1

/*******************************************************************************

     2

     3

  Intel PRO/1000 Linux driver

     4

  Copyright(c) 1999 - 2006 Intel Corporation.

     5

     6

  This program is free software; you can redistribute it and/or modify it

     7

  under the terms and conditions of the GNU General Public License,

     8

  version 2, as published by the Free Software Foundation.

     9

    10

  This program is distributed in the hope it will be useful, but WITHOUT

    11

  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12

  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

    13

  more details.

    14

    15

  You should have received a copy of the GNU General Public License along with

    16

  this program; if not, write to the Free Software Foundation, Inc.,

    17

  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

    18

    19

  The full GNU General Public License is included in this distribution in

    20

  the file called "COPYING".

    21

    22

  Contact Information:

    23

  Linux NICS <linux.nics@intel.com>

    24

  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>

    25

  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

    26

    27

  vim: noexpandtab

    28

    29

*******************************************************************************/

    30

    31

#include "e1000-2.6.35-ethercat.h"

    32

#include <net/ip6_checksum.h>

    33

    34

char e1000_driver_name[] = "ec_e1000";

    35

static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";

    36

#define DRV_VERSION "7.3.21-k6-NAPI"

    37

const char e1000_driver_version[] = DRV_VERSION;

    38

static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";

    39

    40

/* e1000_pci_tbl - PCI Device ID Table

    41

 *

    42

 * Last entry must be all 0s

    43

 *

    44

 * Macro expands to...

    45

 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

    46

 */

    47

static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {

    48

	INTEL_E1000_ETHERNET_DEVICE(0x1000),

    49

	INTEL_E1000_ETHERNET_DEVICE(0x1001),

    50

	INTEL_E1000_ETHERNET_DEVICE(0x1004),

    51

	INTEL_E1000_ETHERNET_DEVICE(0x1008),

    52

	INTEL_E1000_ETHERNET_DEVICE(0x1009),

    53

	INTEL_E1000_ETHERNET_DEVICE(0x100C),

    54

	INTEL_E1000_ETHERNET_DEVICE(0x100D),

    55

	INTEL_E1000_ETHERNET_DEVICE(0x100E),

    56

	INTEL_E1000_ETHERNET_DEVICE(0x100F),

    57

	INTEL_E1000_ETHERNET_DEVICE(0x1010),

    58

	INTEL_E1000_ETHERNET_DEVICE(0x1011),

    59

	INTEL_E1000_ETHERNET_DEVICE(0x1012),

    60

	INTEL_E1000_ETHERNET_DEVICE(0x1013),

    61

	INTEL_E1000_ETHERNET_DEVICE(0x1014),

    62

	INTEL_E1000_ETHERNET_DEVICE(0x1015),

    63

	INTEL_E1000_ETHERNET_DEVICE(0x1016),

    64

	INTEL_E1000_ETHERNET_DEVICE(0x1017),

    65

	INTEL_E1000_ETHERNET_DEVICE(0x1018),

    66

	INTEL_E1000_ETHERNET_DEVICE(0x1019),

    67

	INTEL_E1000_ETHERNET_DEVICE(0x101A),

    68

	INTEL_E1000_ETHERNET_DEVICE(0x101D),

    69

	INTEL_E1000_ETHERNET_DEVICE(0x101E),

    70

	INTEL_E1000_ETHERNET_DEVICE(0x1026),

    71

	INTEL_E1000_ETHERNET_DEVICE(0x1027),

    72

	INTEL_E1000_ETHERNET_DEVICE(0x1028),

    73

	INTEL_E1000_ETHERNET_DEVICE(0x1075),

    74

	INTEL_E1000_ETHERNET_DEVICE(0x1076),

    75

	INTEL_E1000_ETHERNET_DEVICE(0x1077),

    76

	INTEL_E1000_ETHERNET_DEVICE(0x1078),

    77

	INTEL_E1000_ETHERNET_DEVICE(0x1079),

    78

	INTEL_E1000_ETHERNET_DEVICE(0x107A),

    79

	INTEL_E1000_ETHERNET_DEVICE(0x107B),

    80

	INTEL_E1000_ETHERNET_DEVICE(0x107C),

    81

	INTEL_E1000_ETHERNET_DEVICE(0x108A),

    82

	INTEL_E1000_ETHERNET_DEVICE(0x1099),

    83

	INTEL_E1000_ETHERNET_DEVICE(0x10B5),

    84

	/* required last entry */

    85

	{0,}

    86

};

    87

    88

// do not auto-load driver

    89

// MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

    90

    91

int e1000_up(struct e1000_adapter *adapter);

    92

void e1000_down(struct e1000_adapter *adapter);

    93

void e1000_reinit_locked(struct e1000_adapter *adapter);

    94

void e1000_reset(struct e1000_adapter *adapter);

    95

int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);

    96

int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);

    97

int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);

    98

void e1000_free_all_tx_resources(struct e1000_adapter *adapter);

    99

void e1000_free_all_rx_resources(struct e1000_adapter *adapter);

   100

static int e1000_setup_tx_resources(struct e1000_adapter *adapter,

   101

                             struct e1000_tx_ring *txdr);

   102

static int e1000_setup_rx_resources(struct e1000_adapter *adapter,

   103

                             struct e1000_rx_ring *rxdr);

   104

static void e1000_free_tx_resources(struct e1000_adapter *adapter,

   105

                             struct e1000_tx_ring *tx_ring);

   106

static void e1000_free_rx_resources(struct e1000_adapter *adapter,

   107

                             struct e1000_rx_ring *rx_ring);

   108

void e1000_update_stats(struct e1000_adapter *adapter);

   109

   110

static int e1000_init_module(void);

   111

static void e1000_exit_module(void);

   112

static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);

   113

static void __devexit e1000_remove(struct pci_dev *pdev);

   114

static int e1000_alloc_queues(struct e1000_adapter *adapter);

   115

static int e1000_sw_init(struct e1000_adapter *adapter);

   116

static int e1000_open(struct net_device *netdev);

   117

static int e1000_close(struct net_device *netdev);

   118

static void e1000_configure_tx(struct e1000_adapter *adapter);

   119

static void e1000_configure_rx(struct e1000_adapter *adapter);

   120

static void e1000_setup_rctl(struct e1000_adapter *adapter);

   121

static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);

   122

static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);

   123

static void e1000_clean_tx_ring(struct e1000_adapter *adapter,

   124

                                struct e1000_tx_ring *tx_ring);

   125

static void e1000_clean_rx_ring(struct e1000_adapter *adapter,

   126

                                struct e1000_rx_ring *rx_ring);

   127

static void e1000_set_rx_mode(struct net_device *netdev);

   128

static void e1000_update_phy_info(unsigned long data);

   129

static void e1000_watchdog(unsigned long data);

   130

static void e1000_82547_tx_fifo_stall(unsigned long data);

   131

static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,

   132

				    struct net_device *netdev);

   133

static struct net_device_stats * e1000_get_stats(struct net_device *netdev);

   134

static int e1000_change_mtu(struct net_device *netdev, int new_mtu);

   135

static int e1000_set_mac(struct net_device *netdev, void *p);

   136

void ec_poll(struct net_device *);

   137

static irqreturn_t e1000_intr(int irq, void *data);

   138

static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,

   139

			       struct e1000_tx_ring *tx_ring);

   140

static int e1000_clean(struct napi_struct *napi, int budget);

   141

static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,

   142

			       struct e1000_rx_ring *rx_ring,

   143

			       int *work_done, int work_to_do);

   144

static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,

   145

				     struct e1000_rx_ring *rx_ring,

   146

				     int *work_done, int work_to_do);

   147

static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,

   148

				   struct e1000_rx_ring *rx_ring,

   149

				   int cleaned_count);

   150

static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,

   151

					 struct e1000_rx_ring *rx_ring,

   152

					 int cleaned_count);

   153

static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);

   154

static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,

   155

			   int cmd);

   156

static void e1000_enter_82542_rst(struct e1000_adapter *adapter);

   157

static void e1000_leave_82542_rst(struct e1000_adapter *adapter);

   158

static void e1000_tx_timeout(struct net_device *dev);

   159

static void e1000_reset_task(struct work_struct *work);

   160

static void e1000_smartspeed(struct e1000_adapter *adapter);

   161

static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,

   162

                                       struct sk_buff *skb);

   163

   164

static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);

   165

static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);

   166

static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);

   167

static void e1000_restore_vlan(struct e1000_adapter *adapter);

   168

   169

#ifdef CONFIG_PM

   170

static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);

   171

static int e1000_resume(struct pci_dev *pdev);

   172

#endif

   173

static void e1000_shutdown(struct pci_dev *pdev);

   174

   175

#ifdef CONFIG_NET_POLL_CONTROLLER

   176

/* for netdump / net console */

   177

static void e1000_netpoll (struct net_device *netdev);

   178

#endif

   179

   180

#define COPYBREAK_DEFAULT 256

   181

static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;

   182

module_param(copybreak, uint, 0644);

   183

MODULE_PARM_DESC(copybreak,

   184

	"Maximum size of packet that is copied to a new buffer on receive");

   185

   186

static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,

   187

                     pci_channel_state_t state);

   188

static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);

   189

static void e1000_io_resume(struct pci_dev *pdev);

   190

   191

static struct pci_error_handlers e1000_err_handler = {

   192

	.error_detected = e1000_io_error_detected,

   193

	.slot_reset = e1000_io_slot_reset,

   194

	.resume = e1000_io_resume,

   195

};

   196

   197

static struct pci_driver e1000_driver = {

   198

	.name     = e1000_driver_name,

   199

	.id_table = e1000_pci_tbl,

   200

	.probe    = e1000_probe,

   201

	.remove   = __devexit_p(e1000_remove),

   202

#ifdef CONFIG_PM

   203

	/* Power Managment Hooks */

   204

	.suspend  = e1000_suspend,

   205

	.resume   = e1000_resume,

   206

#endif

   207

	.shutdown = e1000_shutdown,

   208

	.err_handler = &e1000_err_handler

   209

};

   210

   211

MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");

   212

MODULE_DESCRIPTION("EtherCAT-capable Intel(R) PRO/1000 Network Driver");

   213

MODULE_LICENSE("GPL");

   214

MODULE_VERSION(DRV_VERSION);

   215

   216

static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;

   217

module_param(debug, int, 0);

   218

MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");

   219

   220

/**

   221

 * e1000_get_hw_dev - return device

   222

 * used by hardware layer to print debugging information

   223

 *

   224

 **/

   225

struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)

   226

{

   227

	struct e1000_adapter *adapter = hw->back;

   228

	return adapter->netdev;

   229

}

   230

   231

/**

   232

 * e1000_init_module - Driver Registration Routine

   233

 *

   234

 * e1000_init_module is the first routine called when the driver is

   235

 * loaded. All it does is register with the PCI subsystem.

   236

 **/

   237

   238

static int __init e1000_init_module(void)

   239

{

   240

	int ret;

   241

	pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);

   242

   243

	pr_info("%s\n", e1000_copyright);

   244

   245

	ret = pci_register_driver(&e1000_driver);

   246

	if (copybreak != COPYBREAK_DEFAULT) {

   247

		if (copybreak == 0)

   248

			pr_info("copybreak disabled\n");

   249

		else

   250

			pr_info("copybreak enabled for "

   251

				   "packets <= %u bytes\n", copybreak);

   252

	}

   253

	return ret;

   254

}

   255

   256

module_init(e1000_init_module);

   257

   258

/**

   259

 * e1000_exit_module - Driver Exit Cleanup Routine

   260

 *

   261

 * e1000_exit_module is called just before the driver is removed

   262

 * from memory.

   263

 **/

   264

   265

static void __exit e1000_exit_module(void)

   266

{

   267

	pci_unregister_driver(&e1000_driver);

   268

}

   269

   270

module_exit(e1000_exit_module);

   271

   272

static int e1000_request_irq(struct e1000_adapter *adapter)

   273

{

   274

	struct net_device *netdev = adapter->netdev;

   275

	irq_handler_t handler = e1000_intr;

   276

	int irq_flags = IRQF_SHARED;

   277

	int err;

   278

   279

	if (adapter->ecdev)

   280

		return 0;

   281

   282

	err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,

   283

	                  netdev);

   284

	if (err) {

   285

		e_err("Unable to allocate interrupt Error: %d\n", err);

   286

	}

   287

   288

	return err;

   289

}

   290

   291

static void e1000_free_irq(struct e1000_adapter *adapter)

   292

{

   293

	struct net_device *netdev = adapter->netdev;

   294

   295

	if (adapter->ecdev)

   296

		return;

   297

   298

	free_irq(adapter->pdev->irq, netdev);

   299

}

   300

   301

/**

   302

 * e1000_irq_disable - Mask off interrupt generation on the NIC

   303

 * @adapter: board private structure

   304

 **/

   305

   306

static void e1000_irq_disable(struct e1000_adapter *adapter)

   307

{

   308

	struct e1000_hw *hw = &adapter->hw;

   309

   310

	if (adapter->ecdev)

   311

		return;

   312

   313

	ew32(IMC, ~0);

   314

	E1000_WRITE_FLUSH();

   315

	synchronize_irq(adapter->pdev->irq);

   316

}

   317

   318

/**

   319

 * e1000_irq_enable - Enable default interrupt generation settings

   320

 * @adapter: board private structure

   321

 **/

   322

   323

static void e1000_irq_enable(struct e1000_adapter *adapter)

   324

{

   325

	struct e1000_hw *hw = &adapter->hw;

   326

   327

	if (adapter->ecdev)

   328

		return;

   329

   330

	ew32(IMS, IMS_ENABLE_MASK);

   331

	E1000_WRITE_FLUSH();

   332

}

   333

   334

static void e1000_update_mng_vlan(struct e1000_adapter *adapter)

   335

{

   336

	struct e1000_hw *hw = &adapter->hw;

   337

	struct net_device *netdev = adapter->netdev;

   338

	u16 vid = hw->mng_cookie.vlan_id;

   339

	u16 old_vid = adapter->mng_vlan_id;

   340

	if (adapter->vlgrp) {

   341

		if (!vlan_group_get_device(adapter->vlgrp, vid)) {

   342

			if (hw->mng_cookie.status &

   343

				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   344

				e1000_vlan_rx_add_vid(netdev, vid);

   345

				adapter->mng_vlan_id = vid;

   346

			} else

   347

				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   348

   349

			if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&

   350

					(vid != old_vid) &&

   351

			    !vlan_group_get_device(adapter->vlgrp, old_vid))

   352

				e1000_vlan_rx_kill_vid(netdev, old_vid);

   353

		} else

   354

			adapter->mng_vlan_id = vid;

   355

	}

   356

}

   357

   358

static void e1000_init_manageability(struct e1000_adapter *adapter)

   359

{

   360

	struct e1000_hw *hw = &adapter->hw;

   361

   362

	if (adapter->en_mng_pt) {

   363

		u32 manc = er32(MANC);

   364

   365

		/* disable hardware interception of ARP */

   366

		manc &= ~(E1000_MANC_ARP_EN);

   367

   368

		ew32(MANC, manc);

   369

	}

   370

}

   371

   372

static void e1000_release_manageability(struct e1000_adapter *adapter)

   373

{

   374

	struct e1000_hw *hw = &adapter->hw;

   375

   376

	if (adapter->en_mng_pt) {

   377

		u32 manc = er32(MANC);

   378

   379

		/* re-enable hardware interception of ARP */

   380

		manc |= E1000_MANC_ARP_EN;

   381

   382

		ew32(MANC, manc);

   383

	}

   384

}

   385

   386

/**

   387

 * e1000_configure - configure the hardware for RX and TX

   388

 * @adapter = private board structure

   389

 **/

   390

static void e1000_configure(struct e1000_adapter *adapter)

   391

{

   392

	struct net_device *netdev = adapter->netdev;

   393

	int i;

   394

   395

	e1000_set_rx_mode(netdev);

   396

   397

	e1000_restore_vlan(adapter);

   398

	e1000_init_manageability(adapter);

   399

   400

	e1000_configure_tx(adapter);

   401

	e1000_setup_rctl(adapter);

   402

	e1000_configure_rx(adapter);

   403

	/* call E1000_DESC_UNUSED which always leaves

   404

	 * at least 1 descriptor unused to make sure

   405

	 * next_to_use != next_to_clean */

   406

	for (i = 0; i < adapter->num_rx_queues; i++) {

   407

		struct e1000_rx_ring *ring = &adapter->rx_ring[i];

   408

		if (adapter->ecdev) {

   409

			/* fill rx ring completely! */

   410

			adapter->alloc_rx_buf(adapter, ring, ring->count);

   411

		} else {

   412

			/* this one leaves the last ring element unallocated! */

   413

			adapter->alloc_rx_buf(adapter, ring,

   414

					E1000_DESC_UNUSED(ring));

   415

		}

   416

	}

   417

}

   418

   419

int e1000_up(struct e1000_adapter *adapter)

   420

{

   421

	struct e1000_hw *hw = &adapter->hw;

   422

   423

	/* hardware has been reset, we need to reload some things */

   424

	e1000_configure(adapter);

   425

   426

	clear_bit(__E1000_DOWN, &adapter->flags);

   427

   428

	if (!adapter->ecdev) {

   429

		napi_enable(&adapter->napi);

   430

   431

		e1000_irq_enable(adapter);

   432

   433

		netif_wake_queue(adapter->netdev);

   434

   435

		/* fire a link change interrupt to start the watchdog */

   436

		ew32(ICS, E1000_ICS_LSC);

   437

	}

   438

	return 0;

   439

}

   440

   441

/**

   442

 * e1000_power_up_phy - restore link in case the phy was powered down

   443

 * @adapter: address of board private structure

   444

 *

   445

 * The phy may be powered down to save power and turn off link when the

   446

 * driver is unloaded and wake on lan is not enabled (among others)

   447

 * *** this routine MUST be followed by a call to e1000_reset ***

   448

 *

   449

 **/

   450

   451

void e1000_power_up_phy(struct e1000_adapter *adapter)

   452

{

   453

	struct e1000_hw *hw = &adapter->hw;

   454

	u16 mii_reg = 0;

   455

   456

	/* Just clear the power down bit to wake the phy back up */

   457

	if (hw->media_type == e1000_media_type_copper) {

   458

		/* according to the manual, the phy will retain its

   459

		 * settings across a power-down/up cycle */

   460

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   461

		mii_reg &= ~MII_CR_POWER_DOWN;

   462

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   463

	}

   464

}

   465

   466

static void e1000_power_down_phy(struct e1000_adapter *adapter)

   467

{

   468

	struct e1000_hw *hw = &adapter->hw;

   469

   470

	/* Power down the PHY so no link is implied when interface is down *

   471

	 * The PHY cannot be powered down if any of the following is true *

   472

	 * (a) WoL is enabled

   473

	 * (b) AMT is active

   474

	 * (c) SoL/IDER session is active */

   475

	if (!adapter->wol && hw->mac_type >= e1000_82540 &&

   476

	   hw->media_type == e1000_media_type_copper) {

   477

		u16 mii_reg = 0;

   478

   479

		switch (hw->mac_type) {

   480

		case e1000_82540:

   481

		case e1000_82545:

   482

		case e1000_82545_rev_3:

   483

		case e1000_82546:

   484

		case e1000_82546_rev_3:

   485

		case e1000_82541:

   486

		case e1000_82541_rev_2:

   487

		case e1000_82547:

   488

		case e1000_82547_rev_2:

   489

			if (er32(MANC) & E1000_MANC_SMBUS_EN)

   490

				goto out;

   491

			break;

   492

		default:

   493

			goto out;

   494

		}

   495

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   496

		mii_reg |= MII_CR_POWER_DOWN;

   497

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   498

		mdelay(1);

   499

	}

   500

out:

   501

	return;

   502

}

   503

   504

void e1000_down(struct e1000_adapter *adapter)

   505

{

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	struct e1000_hw *hw = &adapter->hw;

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	struct net_device *netdev = adapter->netdev;

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	u32 rctl, tctl;

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	/* signal that we're down so the interrupt handler does not

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	 * reschedule our watchdog timer */

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	set_bit(__E1000_DOWN, &adapter->flags);

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	/* disable receives in the hardware */	

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	rctl = er32(RCTL);

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	ew32(RCTL, rctl & ~E1000_RCTL_EN);

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	if (!adapter->ecdev) {

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		/* flush and sleep below */

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		netif_tx_disable(netdev);

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	}

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	/* disable transmits in the hardware */

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	tctl = er32(TCTL);

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	tctl &= ~E1000_TCTL_EN;

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	ew32(TCTL, tctl);

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	/* flush both disables and wait for them to finish */

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	E1000_WRITE_FLUSH();

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	msleep(10);