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

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    27

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

    28

    29

#include "e1000.h"

    30

#include <net/ip6_checksum.h>

    31

#include <linux/io.h>

    32

#include <linux/prefetch.h>

    33

#include <linux/bitops.h>

    34

#include <linux/if_vlan.h>

    35

    36

char e1000_driver_name[] = "e1000";

    37

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

    38

#define DRV_VERSION "7.3.21-k8-NAPI"

    39

const char e1000_driver_version[] = DRV_VERSION;

    40

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

    41

    42

/* e1000_pci_tbl - PCI Device ID Table

    43

 *

    44

 * Last entry must be all 0s

    45

 *

    46

 * Macro expands to...

    47

 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

    48

 */

    49

static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {

    50

	INTEL_E1000_ETHERNET_DEVICE(0x1000),

    51

	INTEL_E1000_ETHERNET_DEVICE(0x1001),

    52

	INTEL_E1000_ETHERNET_DEVICE(0x1004),

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	INTEL_E1000_ETHERNET_DEVICE(0x1008),

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	INTEL_E1000_ETHERNET_DEVICE(0x1009),

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	INTEL_E1000_ETHERNET_DEVICE(0x100C),

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	INTEL_E1000_ETHERNET_DEVICE(0x100D),

    57

	INTEL_E1000_ETHERNET_DEVICE(0x100E),

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	INTEL_E1000_ETHERNET_DEVICE(0x100F),

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	INTEL_E1000_ETHERNET_DEVICE(0x1010),

    60

	INTEL_E1000_ETHERNET_DEVICE(0x1011),

    61

	INTEL_E1000_ETHERNET_DEVICE(0x1012),

    62

	INTEL_E1000_ETHERNET_DEVICE(0x1013),

    63

	INTEL_E1000_ETHERNET_DEVICE(0x1014),

    64

	INTEL_E1000_ETHERNET_DEVICE(0x1015),

    65

	INTEL_E1000_ETHERNET_DEVICE(0x1016),

    66

	INTEL_E1000_ETHERNET_DEVICE(0x1017),

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	INTEL_E1000_ETHERNET_DEVICE(0x1018),

    68

	INTEL_E1000_ETHERNET_DEVICE(0x1019),

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	INTEL_E1000_ETHERNET_DEVICE(0x101A),

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	INTEL_E1000_ETHERNET_DEVICE(0x101D),

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	INTEL_E1000_ETHERNET_DEVICE(0x101E),

    72

	INTEL_E1000_ETHERNET_DEVICE(0x1026),

    73

	INTEL_E1000_ETHERNET_DEVICE(0x1027),

    74

	INTEL_E1000_ETHERNET_DEVICE(0x1028),

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	INTEL_E1000_ETHERNET_DEVICE(0x1075),

    76

	INTEL_E1000_ETHERNET_DEVICE(0x1076),

    77

	INTEL_E1000_ETHERNET_DEVICE(0x1077),

    78

	INTEL_E1000_ETHERNET_DEVICE(0x1078),

    79

	INTEL_E1000_ETHERNET_DEVICE(0x1079),

    80

	INTEL_E1000_ETHERNET_DEVICE(0x107A),

    81

	INTEL_E1000_ETHERNET_DEVICE(0x107B),

    82

	INTEL_E1000_ETHERNET_DEVICE(0x107C),

    83

	INTEL_E1000_ETHERNET_DEVICE(0x108A),

    84

	INTEL_E1000_ETHERNET_DEVICE(0x1099),

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	INTEL_E1000_ETHERNET_DEVICE(0x10B5),

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	INTEL_E1000_ETHERNET_DEVICE(0x2E6E),

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	/* required last entry */

    88

	{0,}

    89

};

    90

    91

MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

    92

    93

int e1000_up(struct e1000_adapter *adapter);

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void e1000_down(struct e1000_adapter *adapter);

    95

void e1000_reinit_locked(struct e1000_adapter *adapter);

    96

void e1000_reset(struct e1000_adapter *adapter);

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int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);

    98

int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);

    99

void e1000_free_all_tx_resources(struct e1000_adapter *adapter);

   100

void e1000_free_all_rx_resources(struct e1000_adapter *adapter);

   101

static int e1000_setup_tx_resources(struct e1000_adapter *adapter,

   102

                             struct e1000_tx_ring *txdr);

   103

static int e1000_setup_rx_resources(struct e1000_adapter *adapter,

   104

                             struct e1000_rx_ring *rxdr);

   105

static void e1000_free_tx_resources(struct e1000_adapter *adapter,

   106

                             struct e1000_tx_ring *tx_ring);

   107

static void e1000_free_rx_resources(struct e1000_adapter *adapter,

   108

                             struct e1000_rx_ring *rx_ring);

   109

void e1000_update_stats(struct e1000_adapter *adapter);

   110

   111

static int e1000_init_module(void);

   112

static void e1000_exit_module(void);

   113

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

   114

static void e1000_remove(struct pci_dev *pdev);

   115

static int e1000_alloc_queues(struct e1000_adapter *adapter);

   116

static int e1000_sw_init(struct e1000_adapter *adapter);

   117

static int e1000_open(struct net_device *netdev);

   118

static int e1000_close(struct net_device *netdev);

   119

static void e1000_configure_tx(struct e1000_adapter *adapter);

   120

static void e1000_configure_rx(struct e1000_adapter *adapter);

   121

static void e1000_setup_rctl(struct e1000_adapter *adapter);

   122

static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);

   123

static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);

   124

static void e1000_clean_tx_ring(struct e1000_adapter *adapter,

   125

                                struct e1000_tx_ring *tx_ring);

   126

static void e1000_clean_rx_ring(struct e1000_adapter *adapter,

   127

                                struct e1000_rx_ring *rx_ring);

   128

static void e1000_set_rx_mode(struct net_device *netdev);

   129

static void e1000_update_phy_info_task(struct work_struct *work);

   130

static void e1000_watchdog(struct work_struct *work);

   131

static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);

   132

static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,

   133

				    struct net_device *netdev);

   134

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

   135

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

   136

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

   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 bool e1000_vlan_used(struct e1000_adapter *adapter);

   165

static void e1000_vlan_mode(struct net_device *netdev,

   166

			    netdev_features_t features);

   167

static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,

   168

				     bool filter_on);

   169

static int e1000_vlan_rx_add_vid(struct net_device *netdev,

   170

				 __be16 proto, u16 vid);

   171

static int e1000_vlan_rx_kill_vid(struct net_device *netdev,

   172

				  __be16 proto, u16 vid);

   173

static void e1000_restore_vlan(struct e1000_adapter *adapter);

   174

   175

#ifdef CONFIG_PM

   176

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

   177

static int e1000_resume(struct pci_dev *pdev);

   178

#endif

   179

static void e1000_shutdown(struct pci_dev *pdev);

   180

   181

#ifdef CONFIG_NET_POLL_CONTROLLER

   182

/* for netdump / net console */

   183

static void e1000_netpoll (struct net_device *netdev);

   184

#endif

   185

   186

#define COPYBREAK_DEFAULT 256

   187

static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;

   188

module_param(copybreak, uint, 0644);

   189

MODULE_PARM_DESC(copybreak,

   190

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

   191

   192

static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,

   193

                     pci_channel_state_t state);

   194

static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);

   195

static void e1000_io_resume(struct pci_dev *pdev);

   196

   197

static const struct pci_error_handlers e1000_err_handler = {

   198

	.error_detected = e1000_io_error_detected,

   199

	.slot_reset = e1000_io_slot_reset,

   200

	.resume = e1000_io_resume,

   201

};

   202

   203

static struct pci_driver e1000_driver = {

   204

	.name     = e1000_driver_name,

   205

	.id_table = e1000_pci_tbl,

   206

	.probe    = e1000_probe,

   207

	.remove   = e1000_remove,

   208

#ifdef CONFIG_PM

   209

	/* Power Management Hooks */

   210

	.suspend  = e1000_suspend,

   211

	.resume   = e1000_resume,

   212

#endif

   213

	.shutdown = e1000_shutdown,

   214

	.err_handler = &e1000_err_handler

   215

};

   216

   217

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");

   218

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

   219

MODULE_LICENSE("GPL");

   220

MODULE_VERSION(DRV_VERSION);

   221

   222

#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)

   223

static int debug = -1;

   224

module_param(debug, int, 0);

   225

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

   226

   227

/**

   228

 * e1000_get_hw_dev - return device

   229

 * used by hardware layer to print debugging information

   230

 *

   231

 **/

   232

struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)

   233

{

   234

	struct e1000_adapter *adapter = hw->back;

   235

	return adapter->netdev;

   236

}

   237

   238

/**

   239

 * e1000_init_module - Driver Registration Routine

   240

 *

   241

 * e1000_init_module is the first routine called when the driver is

   242

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

   243

 **/

   244

static int __init e1000_init_module(void)

   245

{

   246

	int ret;

   247

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

   248

   249

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

   250

   251

	ret = pci_register_driver(&e1000_driver);

   252

	if (copybreak != COPYBREAK_DEFAULT) {

   253

		if (copybreak == 0)

   254

			pr_info("copybreak disabled\n");

   255

		else

   256

			pr_info("copybreak enabled for "

   257

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

   258

	}

   259

	return ret;

   260

}

   261

   262

module_init(e1000_init_module);

   263

   264

/**

   265

 * e1000_exit_module - Driver Exit Cleanup Routine

   266

 *

   267

 * e1000_exit_module is called just before the driver is removed

   268

 * from memory.

   269

 **/

   270

static void __exit e1000_exit_module(void)

   271

{

   272

	pci_unregister_driver(&e1000_driver);

   273

}

   274

   275

module_exit(e1000_exit_module);

   276

   277

static int e1000_request_irq(struct e1000_adapter *adapter)

   278

{

   279

	struct net_device *netdev = adapter->netdev;

   280

	irq_handler_t handler = e1000_intr;

   281

	int irq_flags = IRQF_SHARED;

   282

	int err;

   283

   284

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

   285

	                  netdev);

   286

	if (err) {

   287

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

   288

	}

   289

   290

	return err;

   291

}

   292

   293

static void e1000_free_irq(struct e1000_adapter *adapter)

   294

{

   295

	struct net_device *netdev = adapter->netdev;

   296

   297

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

   298

}

   299

   300

/**

   301

 * e1000_irq_disable - Mask off interrupt generation on the NIC

   302

 * @adapter: board private structure

   303

 **/

   304

static void e1000_irq_disable(struct e1000_adapter *adapter)

   305

{

   306

	struct e1000_hw *hw = &adapter->hw;

   307

   308

	ew32(IMC, ~0);

   309

	E1000_WRITE_FLUSH();

   310

	synchronize_irq(adapter->pdev->irq);

   311

}

   312

   313

/**

   314

 * e1000_irq_enable - Enable default interrupt generation settings

   315

 * @adapter: board private structure

   316

 **/

   317

static void e1000_irq_enable(struct e1000_adapter *adapter)

   318

{

   319

	struct e1000_hw *hw = &adapter->hw;

   320

   321

	ew32(IMS, IMS_ENABLE_MASK);

   322

	E1000_WRITE_FLUSH();

   323

}

   324

   325

static void e1000_update_mng_vlan(struct e1000_adapter *adapter)

   326

{

   327

	struct e1000_hw *hw = &adapter->hw;

   328

	struct net_device *netdev = adapter->netdev;

   329

	u16 vid = hw->mng_cookie.vlan_id;

   330

	u16 old_vid = adapter->mng_vlan_id;

   331

   332

	if (!e1000_vlan_used(adapter))

   333

		return;

   334

   335

	if (!test_bit(vid, adapter->active_vlans)) {

   336

		if (hw->mng_cookie.status &

   337

		    E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   338

			e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);

   339

			adapter->mng_vlan_id = vid;

   340

		} else {

   341

			adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   342

		}

   343

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

   344

		    (vid != old_vid) &&

   345

		    !test_bit(old_vid, adapter->active_vlans))

   346

			e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),

   347

					       old_vid);

   348

	} else {

   349

		adapter->mng_vlan_id = vid;

   350

	}

   351

}

   352

   353

static void e1000_init_manageability(struct e1000_adapter *adapter)

   354

{

   355

	struct e1000_hw *hw = &adapter->hw;

   356

   357

	if (adapter->en_mng_pt) {

   358

		u32 manc = er32(MANC);

   359

   360

		/* disable hardware interception of ARP */

   361

		manc &= ~(E1000_MANC_ARP_EN);

   362

   363

		ew32(MANC, manc);

   364

	}

   365

}

   366

   367

static void e1000_release_manageability(struct e1000_adapter *adapter)

   368

{

   369

	struct e1000_hw *hw = &adapter->hw;

   370

   371

	if (adapter->en_mng_pt) {

   372

		u32 manc = er32(MANC);

   373

   374

		/* re-enable hardware interception of ARP */

   375

		manc |= E1000_MANC_ARP_EN;

   376

   377

		ew32(MANC, manc);

   378

	}

   379

}

   380

   381

/**

   382

 * e1000_configure - configure the hardware for RX and TX

   383

 * @adapter = private board structure

   384

 **/

   385

static void e1000_configure(struct e1000_adapter *adapter)

   386

{

   387

	struct net_device *netdev = adapter->netdev;

   388

	int i;

   389

   390

	e1000_set_rx_mode(netdev);

   391

   392

	e1000_restore_vlan(adapter);

   393

	e1000_init_manageability(adapter);

   394

   395

	e1000_configure_tx(adapter);

   396

	e1000_setup_rctl(adapter);

   397

	e1000_configure_rx(adapter);

   398

	/* call E1000_DESC_UNUSED which always leaves

   399

	 * at least 1 descriptor unused to make sure

   400

	 * next_to_use != next_to_clean

   401

	 */

   402

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

   403

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

   404

		adapter->alloc_rx_buf(adapter, ring,

   405

				      E1000_DESC_UNUSED(ring));

   406

	}

   407

}

   408

   409

int e1000_up(struct e1000_adapter *adapter)

   410

{

   411

	struct e1000_hw *hw = &adapter->hw;

   412

   413

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

   414

	e1000_configure(adapter);

   415

   416

	clear_bit(__E1000_DOWN, &adapter->flags);

   417

   418

	napi_enable(&adapter->napi);

   419

   420

	e1000_irq_enable(adapter);

   421

   422

	netif_wake_queue(adapter->netdev);

   423

   424

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

   425

	ew32(ICS, E1000_ICS_LSC);

   426

	return 0;

   427

}

   428

   429

/**

   430

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

   431

 * @adapter: address of board private structure

   432

 *

   433

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

   434

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

   435

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

   436

 **/

   437

void e1000_power_up_phy(struct e1000_adapter *adapter)

   438

{

   439

	struct e1000_hw *hw = &adapter->hw;

   440

	u16 mii_reg = 0;

   441

   442

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

   443

	if (hw->media_type == e1000_media_type_copper) {

   444

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

   445

		 * settings across a power-down/up cycle

   446

		 */

   447

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   448

		mii_reg &= ~MII_CR_POWER_DOWN;

   449

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   450

	}

   451

}

   452

   453

static void e1000_power_down_phy(struct e1000_adapter *adapter)

   454

{

   455

	struct e1000_hw *hw = &adapter->hw;

   456

   457

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

   458

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

   459

	 * (a) WoL is enabled

   460

	 * (b) AMT is active

   461

	 * (c) SoL/IDER session is active

   462

	 */

   463

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

   464

	   hw->media_type == e1000_media_type_copper) {

   465

		u16 mii_reg = 0;

   466

   467

		switch (hw->mac_type) {

   468

		case e1000_82540:

   469

		case e1000_82545:

   470

		case e1000_82545_rev_3:

   471

		case e1000_82546:

   472

		case e1000_ce4100:

   473

		case e1000_82546_rev_3:

   474

		case e1000_82541:

   475

		case e1000_82541_rev_2:

   476

		case e1000_82547:

   477

		case e1000_82547_rev_2:

   478

			if (er32(MANC) & E1000_MANC_SMBUS_EN)

   479

				goto out;

   480

			break;

   481

		default:

   482

			goto out;

   483

		}

   484

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   485

		mii_reg |= MII_CR_POWER_DOWN;

   486

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   487

		msleep(1);

   488

	}

   489

out:

   490

	return;

   491

}

   492

   493

static void e1000_down_and_stop(struct e1000_adapter *adapter)

   494

{

   495

	set_bit(__E1000_DOWN, &adapter->flags);

   496

   497

	cancel_delayed_work_sync(&adapter->watchdog_task);

   498

   499

	/*

   500

	 * Since the watchdog task can reschedule other tasks, we should cancel

   501

	 * it first, otherwise we can run into the situation when a work is

   502

	 * still running after the adapter has been turned down.

   503

	 */

   504

   505

	cancel_delayed_work_sync(&adapter->phy_info_task);

   506

	cancel_delayed_work_sync(&adapter->fifo_stall_task);

   507

   508

	/* Only kill reset task if adapter is not resetting */

   509

	if (!test_bit(__E1000_RESETTING, &adapter->flags))

   510

		cancel_work_sync(&adapter->reset_task);

   511

}

   512

   513

void e1000_down(struct e1000_adapter *adapter)

   514

{

   515

	struct e1000_hw *hw = &adapter->hw;

   516

	struct net_device *netdev = adapter->netdev;

   517

	u32 rctl, tctl;

   518

   519

   520

	/* disable receives in the hardware */

   521

	rctl = er32(RCTL);

   522

	ew32(RCTL, rctl & ~E1000_RCTL_EN);

   523

	/* flush and sleep below */

   524

   525

	netif_tx_disable(netdev);

   526

   527

	/* disable transmits in the hardware */

   528

	tctl = er32(TCTL);

   529

	tctl &= ~E1000_TCTL_EN;