1

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

     2

     3

  Intel PRO/1000 Linux driver

     4

  Copyright(c) 1999 - 2009 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

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

    28

    29

/* ethtool support for e1000 */

    30

    31

#include <linux/netdevice.h>

    32

#include <linux/ethtool.h>

    33

#include <linux/pci.h>

    34

#include <linux/slab.h>

    35

#include <linux/delay.h>

    36

    37

#include "e1000-2.6.34-ethercat.h"

    38

    39

enum {NETDEV_STATS, E1000_STATS};

    40

    41

struct e1000_stats {

    42

	char stat_string[ETH_GSTRING_LEN];

    43

	int type;

    44

	int sizeof_stat;

    45

	int stat_offset;

    46

};

    47

    48

#define E1000_STAT(m)		E1000_STATS, \

    49

				sizeof(((struct e1000_adapter *)0)->m), \

    50

		      		offsetof(struct e1000_adapter, m)

    51

#define E1000_NETDEV_STAT(m)	NETDEV_STATS, \

    52

				sizeof(((struct net_device *)0)->m), \

    53

				offsetof(struct net_device, m)

    54

    55

static const struct e1000_stats e1000_gstrings_stats[] = {

    56

	{ "rx_packets", E1000_STAT(stats.gprc) },

    57

	{ "tx_packets", E1000_STAT(stats.gptc) },

    58

	{ "rx_bytes", E1000_STAT(stats.gorc) },

    59

	{ "tx_bytes", E1000_STAT(stats.gotc) },

    60

	{ "rx_broadcast", E1000_STAT(stats.bprc) },

    61

	{ "tx_broadcast", E1000_STAT(stats.bptc) },

    62

	{ "rx_multicast", E1000_STAT(stats.mprc) },

    63

	{ "tx_multicast", E1000_STAT(stats.mptc) },

    64

	{ "rx_errors", E1000_NETDEV_STAT(stats.rx_errors) },

    65

	{ "tx_errors", E1000_NETDEV_STAT(stats.tx_errors) },

    66

	{ "tx_dropped", E1000_NETDEV_STAT(stats.tx_dropped) },

    67

	{ "multicast", E1000_STAT(stats.mprc) },

    68

	{ "collisions", E1000_STAT(stats.colc) },

    69

	{ "rx_length_errors", E1000_NETDEV_STAT(stats.rx_length_errors) },

    70

	{ "rx_over_errors", E1000_NETDEV_STAT(stats.rx_over_errors) },

    71

	{ "rx_crc_errors", E1000_STAT(stats.crcerrs) },

    72

	{ "rx_frame_errors", E1000_NETDEV_STAT(stats.rx_frame_errors) },

    73

	{ "rx_no_buffer_count", E1000_STAT(stats.rnbc) },

    74

	{ "rx_missed_errors", E1000_STAT(stats.mpc) },

    75

	{ "tx_aborted_errors", E1000_STAT(stats.ecol) },

    76

	{ "tx_carrier_errors", E1000_STAT(stats.tncrs) },

    77

	{ "tx_fifo_errors", E1000_NETDEV_STAT(stats.tx_fifo_errors) },

    78

	{ "tx_heartbeat_errors", E1000_NETDEV_STAT(stats.tx_heartbeat_errors) },

    79

	{ "tx_window_errors", E1000_STAT(stats.latecol) },

    80

	{ "tx_abort_late_coll", E1000_STAT(stats.latecol) },

    81

	{ "tx_deferred_ok", E1000_STAT(stats.dc) },

    82

	{ "tx_single_coll_ok", E1000_STAT(stats.scc) },

    83

	{ "tx_multi_coll_ok", E1000_STAT(stats.mcc) },

    84

	{ "tx_timeout_count", E1000_STAT(tx_timeout_count) },

    85

	{ "tx_restart_queue", E1000_STAT(restart_queue) },

    86

	{ "rx_long_length_errors", E1000_STAT(stats.roc) },

    87

	{ "rx_short_length_errors", E1000_STAT(stats.ruc) },

    88

	{ "rx_align_errors", E1000_STAT(stats.algnerrc) },

    89

	{ "tx_tcp_seg_good", E1000_STAT(stats.tsctc) },

    90

	{ "tx_tcp_seg_failed", E1000_STAT(stats.tsctfc) },

    91

	{ "rx_flow_control_xon", E1000_STAT(stats.xonrxc) },

    92

	{ "rx_flow_control_xoff", E1000_STAT(stats.xoffrxc) },

    93

	{ "tx_flow_control_xon", E1000_STAT(stats.xontxc) },

    94

	{ "tx_flow_control_xoff", E1000_STAT(stats.xofftxc) },

    95

	{ "rx_long_byte_count", E1000_STAT(stats.gorc) },

    96

	{ "rx_csum_offload_good", E1000_STAT(hw_csum_good) },

    97

	{ "rx_csum_offload_errors", E1000_STAT(hw_csum_err) },

    98

	{ "rx_header_split", E1000_STAT(rx_hdr_split) },

    99

	{ "alloc_rx_buff_failed", E1000_STAT(alloc_rx_buff_failed) },

   100

	{ "tx_smbus", E1000_STAT(stats.mgptc) },

   101

	{ "rx_smbus", E1000_STAT(stats.mgprc) },

   102

	{ "dropped_smbus", E1000_STAT(stats.mgpdc) },

   103

	{ "rx_dma_failed", E1000_STAT(rx_dma_failed) },

   104

	{ "tx_dma_failed", E1000_STAT(tx_dma_failed) },

   105

};

   106

   107

#define E1000_GLOBAL_STATS_LEN	ARRAY_SIZE(e1000_gstrings_stats)

   108

#define E1000_STATS_LEN (E1000_GLOBAL_STATS_LEN)

   109

static const char e1000_gstrings_test[][ETH_GSTRING_LEN] = {

   110

	"Register test  (offline)", "Eeprom test    (offline)",

   111

	"Interrupt test (offline)", "Loopback test  (offline)",

   112

	"Link test   (on/offline)"

   113

};

   114

#define E1000_TEST_LEN ARRAY_SIZE(e1000_gstrings_test)

   115

   116

static int e1000_get_settings(struct net_device *netdev,

   117

			      struct ethtool_cmd *ecmd)

   118

{

   119

	struct e1000_adapter *adapter = netdev_priv(netdev);

   120

	struct e1000_hw *hw = &adapter->hw;

   121

	u32 status;

   122

   123

	if (hw->phy.media_type == e1000_media_type_copper) {

   124

   125

		ecmd->supported = (SUPPORTED_10baseT_Half |

   126

				   SUPPORTED_10baseT_Full |

   127

				   SUPPORTED_100baseT_Half |

   128

				   SUPPORTED_100baseT_Full |

   129

				   SUPPORTED_1000baseT_Full |

   130

				   SUPPORTED_Autoneg |

   131

				   SUPPORTED_TP);

   132

		if (hw->phy.type == e1000_phy_ife)

   133

			ecmd->supported &= ~SUPPORTED_1000baseT_Full;

   134

		ecmd->advertising = ADVERTISED_TP;

   135

   136

		if (hw->mac.autoneg == 1) {

   137

			ecmd->advertising |= ADVERTISED_Autoneg;

   138

			/* the e1000 autoneg seems to match ethtool nicely */

   139

			ecmd->advertising |= hw->phy.autoneg_advertised;

   140

		}

   141

   142

		ecmd->port = PORT_TP;

   143

		ecmd->phy_address = hw->phy.addr;

   144

		ecmd->transceiver = XCVR_INTERNAL;

   145

   146

	} else {

   147

		ecmd->supported   = (SUPPORTED_1000baseT_Full |

   148

				     SUPPORTED_FIBRE |

   149

				     SUPPORTED_Autoneg);

   150

   151

		ecmd->advertising = (ADVERTISED_1000baseT_Full |

   152

				     ADVERTISED_FIBRE |

   153

				     ADVERTISED_Autoneg);

   154

   155

		ecmd->port = PORT_FIBRE;

   156

		ecmd->transceiver = XCVR_EXTERNAL;

   157

	}

   158

   159

	status = er32(STATUS);

   160

	if (status & E1000_STATUS_LU) {

   161

		if (status & E1000_STATUS_SPEED_1000)

   162

			ecmd->speed = 1000;

   163

		else if (status & E1000_STATUS_SPEED_100)

   164

			ecmd->speed = 100;

   165

		else

   166

			ecmd->speed = 10;

   167

   168

		if (status & E1000_STATUS_FD)

   169

			ecmd->duplex = DUPLEX_FULL;

   170

		else

   171

			ecmd->duplex = DUPLEX_HALF;

   172

	} else {

   173

		ecmd->speed = -1;

   174

		ecmd->duplex = -1;

   175

	}

   176

   177

	ecmd->autoneg = ((hw->phy.media_type == e1000_media_type_fiber) ||

   178

			 hw->mac.autoneg) ? AUTONEG_ENABLE : AUTONEG_DISABLE;

   179

   180

	/* MDI-X => 2; MDI =>1; Invalid =>0 */

   181

	if ((hw->phy.media_type == e1000_media_type_copper) &&

   182

	    !hw->mac.get_link_status)

   183

		ecmd->eth_tp_mdix = hw->phy.is_mdix ? ETH_TP_MDI_X :

   184

		                                      ETH_TP_MDI;

   185

	else

   186

		ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;

   187

   188

	return 0;

   189

}

   190

   191

static u32 e1000_get_link(struct net_device *netdev)

   192

{

   193

	struct e1000_adapter *adapter = netdev_priv(netdev);

   194

	struct e1000_mac_info *mac = &adapter->hw.mac;

   195

   196

	/*

   197

	 * If the link is not reported up to netdev, interrupts are disabled,

   198

	 * and so the physical link state may have changed since we last

   199

	 * looked. Set get_link_status to make sure that the true link

   200

	 * state is interrogated, rather than pulling a cached and possibly

   201

	 * stale link state from the driver.

   202

	 */

   203

	if (!netif_carrier_ok(netdev))

   204

		mac->get_link_status = 1;

   205

   206

	return e1000e_has_link(adapter);

   207

}

   208

   209

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

   210

{

   211

	struct e1000_mac_info *mac = &adapter->hw.mac;

   212

   213

	mac->autoneg = 0;

   214

   215

	/* Fiber NICs only allow 1000 gbps Full duplex */

   216

	if ((adapter->hw.phy.media_type == e1000_media_type_fiber) &&

   217

		spddplx != (SPEED_1000 + DUPLEX_FULL)) {

   218

		e_err("Unsupported Speed/Duplex configuration\n");

   219

		return -EINVAL;

   220

	}

   221

   222

	switch (spddplx) {

   223

	case SPEED_10 + DUPLEX_HALF:

   224

		mac->forced_speed_duplex = ADVERTISE_10_HALF;

   225

		break;

   226

	case SPEED_10 + DUPLEX_FULL:

   227

		mac->forced_speed_duplex = ADVERTISE_10_FULL;

   228

		break;

   229

	case SPEED_100 + DUPLEX_HALF:

   230

		mac->forced_speed_duplex = ADVERTISE_100_HALF;

   231

		break;

   232

	case SPEED_100 + DUPLEX_FULL:

   233

		mac->forced_speed_duplex = ADVERTISE_100_FULL;

   234

		break;

   235

	case SPEED_1000 + DUPLEX_FULL:

   236

		mac->autoneg = 1;

   237

		adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;

   238

		break;

   239

	case SPEED_1000 + DUPLEX_HALF: /* not supported */

   240

	default:

   241

		e_err("Unsupported Speed/Duplex configuration\n");

   242

		return -EINVAL;

   243

	}

   244

	return 0;

   245

}

   246

   247

static int e1000_set_settings(struct net_device *netdev,

   248

			      struct ethtool_cmd *ecmd)

   249

{

   250

	struct e1000_adapter *adapter = netdev_priv(netdev);

   251

	struct e1000_hw *hw = &adapter->hw;

   252

   253

	if (adapter->ecdev)

   254

		return -EBUSY;

   255

   256

	/*

   257

	 * When SoL/IDER sessions are active, autoneg/speed/duplex

   258

	 * cannot be changed

   259

	 */

   260

	if (e1000_check_reset_block(hw)) {

   261

		e_err("Cannot change link characteristics when SoL/IDER is "

   262

		      "active.\n");

   263

		return -EINVAL;

   264

	}

   265

   266

	while (test_and_set_bit(__E1000_RESETTING, &adapter->state))

   267

		msleep(1);

   268

   269

	if (ecmd->autoneg == AUTONEG_ENABLE) {

   270

		hw->mac.autoneg = 1;

   271

		if (hw->phy.media_type == e1000_media_type_fiber)

   272

			hw->phy.autoneg_advertised = ADVERTISED_1000baseT_Full |

   273

						     ADVERTISED_FIBRE |

   274

						     ADVERTISED_Autoneg;

   275

		else

   276

			hw->phy.autoneg_advertised = ecmd->advertising |

   277

						     ADVERTISED_TP |

   278

						     ADVERTISED_Autoneg;

   279

		ecmd->advertising = hw->phy.autoneg_advertised;

   280

		if (adapter->fc_autoneg)

   281

			hw->fc.requested_mode = e1000_fc_default;

   282

	} else {

   283

		if (e1000_set_spd_dplx(adapter, ecmd->speed + ecmd->duplex)) {

   284

			clear_bit(__E1000_RESETTING, &adapter->state);

   285

			return -EINVAL;

   286

		}

   287

	}

   288

   289

	/* reset the link */

   290

   291

	if (netif_running(adapter->netdev)) {

   292

		e1000e_down(adapter);

   293

		e1000e_up(adapter);

   294

	} else {

   295

		e1000e_reset(adapter);

   296

	}

   297

   298

	clear_bit(__E1000_RESETTING, &adapter->state);

   299

	return 0;

   300

}

   301

   302

static void e1000_get_pauseparam(struct net_device *netdev,

   303

				 struct ethtool_pauseparam *pause)

   304

{

   305

	struct e1000_adapter *adapter = netdev_priv(netdev);

   306

	struct e1000_hw *hw = &adapter->hw;

   307

   308

	pause->autoneg =

   309

		(adapter->fc_autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE);

   310

   311

	if (hw->fc.current_mode == e1000_fc_rx_pause) {

   312

		pause->rx_pause = 1;

   313

	} else if (hw->fc.current_mode == e1000_fc_tx_pause) {

   314

		pause->tx_pause = 1;

   315

	} else if (hw->fc.current_mode == e1000_fc_full) {

   316

		pause->rx_pause = 1;

   317

		pause->tx_pause = 1;

   318

	}

   319

}

   320

   321

static int e1000_set_pauseparam(struct net_device *netdev,

   322

				struct ethtool_pauseparam *pause)

   323

{

   324

	struct e1000_adapter *adapter = netdev_priv(netdev);

   325

	struct e1000_hw *hw = &adapter->hw;

   326

	int retval = 0;

   327

   328

	if (adapter->ecdev)

   329

		return -EBUSY;

   330

   331

	adapter->fc_autoneg = pause->autoneg;

   332

   333

	while (test_and_set_bit(__E1000_RESETTING, &adapter->state))

   334

		msleep(1);

   335

   336

	if (adapter->fc_autoneg == AUTONEG_ENABLE) {

   337

		hw->fc.requested_mode = e1000_fc_default;

   338

		if (netif_running(adapter->netdev)) {

   339

			e1000e_down(adapter);

   340

			e1000e_up(adapter);

   341

		} else {

   342

			e1000e_reset(adapter);

   343

		}

   344

	} else {

   345

		if (pause->rx_pause && pause->tx_pause)

   346

			hw->fc.requested_mode = e1000_fc_full;

   347

		else if (pause->rx_pause && !pause->tx_pause)

   348

			hw->fc.requested_mode = e1000_fc_rx_pause;

   349

		else if (!pause->rx_pause && pause->tx_pause)

   350

			hw->fc.requested_mode = e1000_fc_tx_pause;

   351

		else if (!pause->rx_pause && !pause->tx_pause)

   352

			hw->fc.requested_mode = e1000_fc_none;

   353

   354

		hw->fc.current_mode = hw->fc.requested_mode;

   355

   356

		if (hw->phy.media_type == e1000_media_type_fiber) {

   357

			retval = hw->mac.ops.setup_link(hw);

   358

			/* implicit goto out */

   359

		} else {

   360

			retval = e1000e_force_mac_fc(hw);

   361

			if (retval)

   362

				goto out;

   363

			e1000e_set_fc_watermarks(hw);

   364

		}

   365

	}

   366

   367

out:

   368

	clear_bit(__E1000_RESETTING, &adapter->state);

   369

	return retval;

   370

}

   371

   372

static u32 e1000_get_rx_csum(struct net_device *netdev)

   373

{

   374

	struct e1000_adapter *adapter = netdev_priv(netdev);

   375

	return (adapter->flags & FLAG_RX_CSUM_ENABLED);

   376

}

   377

   378

static int e1000_set_rx_csum(struct net_device *netdev, u32 data)

   379

{

   380

	struct e1000_adapter *adapter = netdev_priv(netdev);

   381

   382

	if (adapter->ecdev)

   383

		return -EBUSY;

   384

   385

	if (data)

   386

		adapter->flags |= FLAG_RX_CSUM_ENABLED;

   387

	else

   388

		adapter->flags &= ~FLAG_RX_CSUM_ENABLED;

   389

   390

	if (netif_running(netdev))

   391

		e1000e_reinit_locked(adapter);

   392

	else

   393

		e1000e_reset(adapter);

   394

	return 0;

   395

}

   396

   397

static u32 e1000_get_tx_csum(struct net_device *netdev)

   398

{

   399

	return ((netdev->features & NETIF_F_HW_CSUM) != 0);

   400

}

   401

   402

static int e1000_set_tx_csum(struct net_device *netdev, u32 data)

   403

{

   404

	if (data)

   405

		netdev->features |= NETIF_F_HW_CSUM;

   406

	else

   407

		netdev->features &= ~NETIF_F_HW_CSUM;

   408

   409

	return 0;

   410

}

   411

   412

static int e1000_set_tso(struct net_device *netdev, u32 data)

   413

{

   414

	struct e1000_adapter *adapter = netdev_priv(netdev);

   415

   416

	if (data) {

   417

		netdev->features |= NETIF_F_TSO;

   418

		netdev->features |= NETIF_F_TSO6;

   419

	} else {

   420

		netdev->features &= ~NETIF_F_TSO;

   421

		netdev->features &= ~NETIF_F_TSO6;

   422

	}

   423

   424

	e_info("TSO is %s\n", data ? "Enabled" : "Disabled");

   425

	adapter->flags |= FLAG_TSO_FORCE;

   426

	return 0;

   427

}

   428

   429

static u32 e1000_get_msglevel(struct net_device *netdev)

   430

{

   431

	struct e1000_adapter *adapter = netdev_priv(netdev);

   432

	return adapter->msg_enable;

   433

}

   434

   435

static void e1000_set_msglevel(struct net_device *netdev, u32 data)

   436

{

   437

	struct e1000_adapter *adapter = netdev_priv(netdev);

   438

	adapter->msg_enable = data;

   439

}

   440

   441

static int e1000_get_regs_len(struct net_device *netdev)

   442

{

   443

#define E1000_REGS_LEN 32 /* overestimate */

   444

	return E1000_REGS_LEN * sizeof(u32);

   445

}

   446

   447

static void e1000_get_regs(struct net_device *netdev,

   448

			   struct ethtool_regs *regs, void *p)

   449

{

   450

	struct e1000_adapter *adapter = netdev_priv(netdev);

   451

	struct e1000_hw *hw = &adapter->hw;

   452

	u32 *regs_buff = p;

   453

	u16 phy_data;

   454

	u8 revision_id;

   455

   456

	memset(p, 0, E1000_REGS_LEN * sizeof(u32));

   457

   458

	pci_read_config_byte(adapter->pdev, PCI_REVISION_ID, &revision_id);

   459

   460

	regs->version = (1 << 24) | (revision_id << 16) | adapter->pdev->device;

   461

   462

	regs_buff[0]  = er32(CTRL);

   463

	regs_buff[1]  = er32(STATUS);

   464

   465

	regs_buff[2]  = er32(RCTL);

   466

	regs_buff[3]  = er32(RDLEN);

   467

	regs_buff[4]  = er32(RDH);

   468

	regs_buff[5]  = er32(RDT);

   469

	regs_buff[6]  = er32(RDTR);

   470

   471

	regs_buff[7]  = er32(TCTL);

   472

	regs_buff[8]  = er32(TDLEN);

   473

	regs_buff[9]  = er32(TDH);

   474

	regs_buff[10] = er32(TDT);

   475

	regs_buff[11] = er32(TIDV);

   476

   477

	regs_buff[12] = adapter->hw.phy.type;  /* PHY type (IGP=1, M88=0) */

   478

   479

	/* ethtool doesn't use anything past this point, so all this

   480

	 * code is likely legacy junk for apps that may or may not

   481

	 * exist */

   482

	if (hw->phy.type == e1000_phy_m88) {

   483

		e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);

   484

		regs_buff[13] = (u32)phy_data; /* cable length */

   485

		regs_buff[14] = 0;  /* Dummy (to align w/ IGP phy reg dump) */

   486

		regs_buff[15] = 0;  /* Dummy (to align w/ IGP phy reg dump) */

   487

		regs_buff[16] = 0;  /* Dummy (to align w/ IGP phy reg dump) */

   488

		e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);

   489

		regs_buff[17] = (u32)phy_data; /* extended 10bt distance */

   490

		regs_buff[18] = regs_buff[13]; /* cable polarity */

   491

		regs_buff[19] = 0;  /* Dummy (to align w/ IGP phy reg dump) */

   492

		regs_buff[20] = regs_buff[17]; /* polarity correction */

   493

		/* phy receive errors */

   494

		regs_buff[22] = adapter->phy_stats.receive_errors;

   495

		regs_buff[23] = regs_buff[13]; /* mdix mode */

   496

	}

   497

	regs_buff[21] = 0; /* was idle_errors */

   498

	e1e_rphy(hw, PHY_1000T_STATUS, &phy_data);

   499

	regs_buff[24] = (u32)phy_data;  /* phy local receiver status */

   500

	regs_buff[25] = regs_buff[24];  /* phy remote receiver status */

   501

}

   502

   503

static int e1000_get_eeprom_len(struct net_device *netdev)

   504

{

   505

	struct e1000_adapter *adapter = netdev_priv(netdev);

   506

	return adapter->hw.nvm.word_size * 2;

   507

}

   508

   509

static int e1000_get_eeprom(struct net_device *netdev,

   510

			    struct ethtool_eeprom *eeprom, u8 *bytes)

   511

{

   512

	struct e1000_adapter *adapter = netdev_priv(netdev);

   513

	struct e1000_hw *hw = &adapter->hw;

   514

	u16 *eeprom_buff;

   515

	int first_word;

   516

	int last_word;

   517

	int ret_val = 0;

   518

	u16 i;

   519

   520

	if (eeprom->len == 0)

   521

		return -EINVAL;

   522

   523

	eeprom->magic = adapter->pdev->vendor | (adapter->pdev->device << 16);

   524

   525

	first_word = eeprom->offset >> 1;

   526

	last_word = (eeprom->offset + eeprom->len - 1) >> 1;

   527

   528

	eeprom_buff = kmalloc(sizeof(u16) *

   529

			(last_word - first_word + 1), GFP_KERNEL);