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),

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	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),

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	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),

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	INTEL_E1000_ETHERNET_DEVICE(0x1014),

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	INTEL_E1000_ETHERNET_DEVICE(0x1015),

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	INTEL_E1000_ETHERNET_DEVICE(0x1016),

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	INTEL_E1000_ETHERNET_DEVICE(0x1017),

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	INTEL_E1000_ETHERNET_DEVICE(0x1018),

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	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),

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	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),

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	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 __devexit 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, u16 vid);

   170

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

   171

static void e1000_restore_vlan(struct e1000_adapter *adapter);

   172

   173

#ifdef CONFIG_PM

   174

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

   175

static int e1000_resume(struct pci_dev *pdev);

   176

#endif

   177

static void e1000_shutdown(struct pci_dev *pdev);

   178

   179

#ifdef CONFIG_NET_POLL_CONTROLLER

   180

/* for netdump / net console */

   181

static void e1000_netpoll (struct net_device *netdev);

   182

#endif

   183

   184

#define COPYBREAK_DEFAULT 256

   185

static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;

   186

module_param(copybreak, uint, 0644);

   187

MODULE_PARM_DESC(copybreak,

   188

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

   189

   190

static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,

   191

                     pci_channel_state_t state);

   192

static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);

   193

static void e1000_io_resume(struct pci_dev *pdev);

   194

   195

static struct pci_error_handlers e1000_err_handler = {

   196

	.error_detected = e1000_io_error_detected,

   197

	.slot_reset = e1000_io_slot_reset,

   198

	.resume = e1000_io_resume,

   199

};

   200

   201

static struct pci_driver e1000_driver = {

   202

	.name     = e1000_driver_name,

   203

	.id_table = e1000_pci_tbl,

   204

	.probe    = e1000_probe,

   205

	.remove   = __devexit_p(e1000_remove),

   206

#ifdef CONFIG_PM

   207

	/* Power Management Hooks */

   208

	.suspend  = e1000_suspend,

   209

	.resume   = e1000_resume,

   210

#endif

   211

	.shutdown = e1000_shutdown,

   212

	.err_handler = &e1000_err_handler

   213

};

   214

   215

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

   216

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

   217

MODULE_LICENSE("GPL");

   218

MODULE_VERSION(DRV_VERSION);

   219

   220

#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)

   221

static int debug = -1;

   222

module_param(debug, int, 0);

   223

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

   224

   225

/**

   226

 * e1000_get_hw_dev - return device

   227

 * used by hardware layer to print debugging information

   228

 *

   229

 **/

   230

struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)

   231

{

   232

	struct e1000_adapter *adapter = hw->back;

   233

	return adapter->netdev;

   234

}

   235

   236

/**

   237

 * e1000_init_module - Driver Registration Routine

   238

 *

   239

 * e1000_init_module is the first routine called when the driver is

   240

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

   241

 **/

   242

   243

static int __init e1000_init_module(void)

   244

{

   245

	int ret;

   246

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

   247

   248

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

   249

   250

	ret = pci_register_driver(&e1000_driver);

   251

	if (copybreak != COPYBREAK_DEFAULT) {

   252

		if (copybreak == 0)

   253

			pr_info("copybreak disabled\n");

   254

		else

   255

			pr_info("copybreak enabled for "

   256

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

   257

	}

   258

	return ret;

   259

}

   260

   261

module_init(e1000_init_module);

   262

   263

/**

   264

 * e1000_exit_module - Driver Exit Cleanup Routine

   265

 *

   266

 * e1000_exit_module is called just before the driver is removed

   267

 * from memory.

   268

 **/

   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

   305

static void e1000_irq_disable(struct e1000_adapter *adapter)

   306

{

   307

	struct e1000_hw *hw = &adapter->hw;

   308

   309

	ew32(IMC, ~0);

   310

	E1000_WRITE_FLUSH();

   311

	synchronize_irq(adapter->pdev->irq);

   312

}

   313

   314

/**

   315

 * e1000_irq_enable - Enable default interrupt generation settings

   316

 * @adapter: board private structure

   317

 **/

   318

   319

static void e1000_irq_enable(struct e1000_adapter *adapter)

   320

{

   321

	struct e1000_hw *hw = &adapter->hw;

   322

   323

	ew32(IMS, IMS_ENABLE_MASK);

   324

	E1000_WRITE_FLUSH();

   325

}

   326

   327

static void e1000_update_mng_vlan(struct e1000_adapter *adapter)

   328

{

   329

	struct e1000_hw *hw = &adapter->hw;

   330

	struct net_device *netdev = adapter->netdev;

   331

	u16 vid = hw->mng_cookie.vlan_id;

   332

	u16 old_vid = adapter->mng_vlan_id;

   333

   334

	if (!e1000_vlan_used(adapter))

   335

		return;

   336

   337

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

   338

		if (hw->mng_cookie.status &

   339

		    E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   340

			e1000_vlan_rx_add_vid(netdev, vid);

   341

			adapter->mng_vlan_id = vid;

   342

		} else {

   343

			adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   344

		}

   345

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

   346

		    (vid != old_vid) &&

   347

		    !test_bit(old_vid, adapter->active_vlans))

   348

			e1000_vlan_rx_kill_vid(netdev, old_vid);

   349

	} else {

   350

		adapter->mng_vlan_id = vid;

   351

	}

   352

}

   353

   354

static void e1000_init_manageability(struct e1000_adapter *adapter)

   355

{

   356

	struct e1000_hw *hw = &adapter->hw;

   357

   358

	if (adapter->en_mng_pt) {

   359

		u32 manc = er32(MANC);

   360

   361

		/* disable hardware interception of ARP */

   362

		manc &= ~(E1000_MANC_ARP_EN);

   363

   364

		ew32(MANC, manc);

   365

	}

   366

}

   367

   368

static void e1000_release_manageability(struct e1000_adapter *adapter)

   369

{

   370

	struct e1000_hw *hw = &adapter->hw;

   371

   372

	if (adapter->en_mng_pt) {

   373

		u32 manc = er32(MANC);

   374

   375

		/* re-enable hardware interception of ARP */

   376

		manc |= E1000_MANC_ARP_EN;

   377

   378

		ew32(MANC, manc);

   379

	}

   380

}

   381

   382

/**

   383

 * e1000_configure - configure the hardware for RX and TX

   384

 * @adapter = private board structure

   385

 **/

   386

static void e1000_configure(struct e1000_adapter *adapter)

   387

{

   388

	struct net_device *netdev = adapter->netdev;

   389

	int i;

   390

   391

	e1000_set_rx_mode(netdev);

   392

   393

	e1000_restore_vlan(adapter);

   394

	e1000_init_manageability(adapter);

   395

   396

	e1000_configure_tx(adapter);

   397

	e1000_setup_rctl(adapter);

   398

	e1000_configure_rx(adapter);

   399

	/* call E1000_DESC_UNUSED which always leaves

   400

	 * at least 1 descriptor unused to make sure

   401

	 * next_to_use != next_to_clean */

   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

 **/

   438

   439

void e1000_power_up_phy(struct e1000_adapter *adapter)

   440

{

   441

	struct e1000_hw *hw = &adapter->hw;

   442

	u16 mii_reg = 0;

   443

   444

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

   445

	if (hw->media_type == e1000_media_type_copper) {

   446

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

   447

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

   448

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   449

		mii_reg &= ~MII_CR_POWER_DOWN;

   450

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   451

	}

   452

}

   453

   454

static void e1000_power_down_phy(struct e1000_adapter *adapter)

   455

{

   456

	struct e1000_hw *hw = &adapter->hw;

   457

   458

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

   459

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

   460

	 * (a) WoL is enabled

   461

	 * (b) AMT is active

   462

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

   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

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

   498

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

   499

		cancel_work_sync(&adapter->reset_task);

   500

   501

	cancel_delayed_work_sync(&adapter->watchdog_task);

   502

	cancel_delayed_work_sync(&adapter->phy_info_task);

   503

	cancel_delayed_work_sync(&adapter->fifo_stall_task);

   504

}

   505

   506

void e1000_down(struct e1000_adapter *adapter)

   507

{

   508

	struct e1000_hw *hw = &adapter->hw;

   509

	struct net_device *netdev = adapter->netdev;

   510

	u32 rctl, tctl;

   511

   512

   513

	/* disable receives in the hardware */

   514

	rctl = er32(RCTL);

   515

	ew32(RCTL, rctl & ~E1000_RCTL_EN);

   516

	/* flush and sleep below */

   517

   518

	netif_tx_disable(netdev);

   519

   520

	/* disable transmits in the hardware */

   521

	tctl = er32(TCTL);

   522

	tctl &= ~E1000_TCTL_EN;

   523

	ew32(TCTL, tctl);

   524

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

   525

	E1000_WRITE_FLUSH();

   526

	msleep(10);

   527

   528

	napi_disable(&adapter->napi);

   529

   530

	e1000_irq_disable(adapter);