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

     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

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  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

  vim: noexpandtab

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    29

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

    30

    31

#include "e1000-3.0-ethercat.h"

    32

#include <net/ip6_checksum.h>

    33

#include <linux/io.h>

    34

#include <linux/prefetch.h>

    35

    36

/* Intel Media SOC GbE MDIO physical base address */

    37

static unsigned long ce4100_gbe_mdio_base_phy;

    38

/* Intel Media SOC GbE MDIO virtual base address */

    39

void __iomem *ce4100_gbe_mdio_base_virt;

    40

    41

char e1000_driver_name[] = "ec_e1000";

    42

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

    43

#define DRV_VERSION "7.3.21-k8-NAPI"

    44

const char e1000_driver_version[] = DRV_VERSION;

    45

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

    46

    47

/* e1000_pci_tbl - PCI Device ID Table

    48

 *

    49

 * Last entry must be all 0s

    50

 *

    51

 * Macro expands to...

    52

 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

    53

 */

    54

static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {

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	INTEL_E1000_ETHERNET_DEVICE(0x1000),

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	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),

    62

	INTEL_E1000_ETHERNET_DEVICE(0x100E),

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	INTEL_E1000_ETHERNET_DEVICE(0x100F),

    64

	INTEL_E1000_ETHERNET_DEVICE(0x1010),

    65

	INTEL_E1000_ETHERNET_DEVICE(0x1011),

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	INTEL_E1000_ETHERNET_DEVICE(0x1012),

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	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),

    78

	INTEL_E1000_ETHERNET_DEVICE(0x1027),

    79

	INTEL_E1000_ETHERNET_DEVICE(0x1028),

    80

	INTEL_E1000_ETHERNET_DEVICE(0x1075),

    81

	INTEL_E1000_ETHERNET_DEVICE(0x1076),

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	INTEL_E1000_ETHERNET_DEVICE(0x1077),

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	INTEL_E1000_ETHERNET_DEVICE(0x1078),

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	INTEL_E1000_ETHERNET_DEVICE(0x1079),

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	INTEL_E1000_ETHERNET_DEVICE(0x107A),

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	INTEL_E1000_ETHERNET_DEVICE(0x107B),

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	INTEL_E1000_ETHERNET_DEVICE(0x107C),

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	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 */

    93

	{0,}

    94

};

    95

    96

// do not auto-load driver

    97

// MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

    98

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int e1000_up(struct e1000_adapter *adapter);

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void e1000_down(struct e1000_adapter *adapter);

   101

void e1000_reinit_locked(struct e1000_adapter *adapter);

   102

void e1000_reset(struct e1000_adapter *adapter);

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int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);

   104

int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);

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void e1000_free_all_tx_resources(struct e1000_adapter *adapter);

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void e1000_free_all_rx_resources(struct e1000_adapter *adapter);

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static int e1000_setup_tx_resources(struct e1000_adapter *adapter,

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                             struct e1000_tx_ring *txdr);

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static int e1000_setup_rx_resources(struct e1000_adapter *adapter,

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                             struct e1000_rx_ring *rxdr);

   111

static void e1000_free_tx_resources(struct e1000_adapter *adapter,

   112

                             struct e1000_tx_ring *tx_ring);

   113

static void e1000_free_rx_resources(struct e1000_adapter *adapter,

   114

                             struct e1000_rx_ring *rx_ring);

   115

void e1000_update_stats(struct e1000_adapter *adapter);

   116

   117

static int e1000_init_module(void);

   118

static void e1000_exit_module(void);

   119

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

   120

static void __devexit e1000_remove(struct pci_dev *pdev);

   121

static int e1000_alloc_queues(struct e1000_adapter *adapter);

   122

static int e1000_sw_init(struct e1000_adapter *adapter);

   123

static int e1000_open(struct net_device *netdev);

   124

static int e1000_close(struct net_device *netdev);

   125

static void e1000_configure_tx(struct e1000_adapter *adapter);

   126

static void e1000_configure_rx(struct e1000_adapter *adapter);

   127

static void e1000_setup_rctl(struct e1000_adapter *adapter);

   128

static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);

   129

static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);

   130

static void e1000_clean_tx_ring(struct e1000_adapter *adapter,

   131

                                struct e1000_tx_ring *tx_ring);

   132

static void e1000_clean_rx_ring(struct e1000_adapter *adapter,

   133

                                struct e1000_rx_ring *rx_ring);

   134

static void e1000_set_rx_mode(struct net_device *netdev);

   135

static void e1000_update_phy_info(unsigned long data);

   136

static void e1000_update_phy_info_task(struct work_struct *work);

   137

static void e1000_watchdog(unsigned long data);

   138

static void e1000_82547_tx_fifo_stall(unsigned long data);

   139

static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);

   140

static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,

   141

				    struct net_device *netdev);

   142

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

   143

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

   144

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

   145

void ec_poll(struct net_device *);

   146

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

   147

static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,

   148

			       struct e1000_tx_ring *tx_ring);

   149

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

   150

static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,

   151

			       struct e1000_rx_ring *rx_ring,

   152

			       int *work_done, int work_to_do);

   153

static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,

   154

				     struct e1000_rx_ring *rx_ring,

   155

				     int *work_done, int work_to_do);

   156

static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,

   157

				   struct e1000_rx_ring *rx_ring,

   158

				   int cleaned_count);

   159

static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,

   160

					 struct e1000_rx_ring *rx_ring,

   161

					 int cleaned_count);

   162

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

   163

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

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			   int cmd);

   165

static void e1000_enter_82542_rst(struct e1000_adapter *adapter);

   166

static void e1000_leave_82542_rst(struct e1000_adapter *adapter);

   167

static void e1000_tx_timeout(struct net_device *dev);

   168

static void e1000_reset_task(struct work_struct *work);

   169

static void e1000_smartspeed(struct e1000_adapter *adapter);

   170

static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,

   171

                                       struct sk_buff *skb);

   172

   173

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

   174

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

   175

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

   176

static void e1000_restore_vlan(struct e1000_adapter *adapter);

   177

   178

#ifdef CONFIG_PM

   179

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

   180

static int e1000_resume(struct pci_dev *pdev);

   181

#endif

   182

static void e1000_shutdown(struct pci_dev *pdev);

   183

   184

#ifdef CONFIG_NET_POLL_CONTROLLER

   185

/* for netdump / net console */

   186

static void e1000_netpoll (struct net_device *netdev);

   187

#endif

   188

   189

#define COPYBREAK_DEFAULT 256

   190

static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;

   191

module_param(copybreak, uint, 0644);

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MODULE_PARM_DESC(copybreak,

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

   194

   195

static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,

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                     pci_channel_state_t state);

   197

static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);

   198

static void e1000_io_resume(struct pci_dev *pdev);

   199

   200

static struct pci_error_handlers e1000_err_handler = {

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	.error_detected = e1000_io_error_detected,

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	.slot_reset = e1000_io_slot_reset,

   203

	.resume = e1000_io_resume,

   204

};

   205

   206

static struct pci_driver e1000_driver = {

   207

	.name     = e1000_driver_name,

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	.id_table = e1000_pci_tbl,

   209

	.probe    = e1000_probe,

   210

	.remove   = __devexit_p(e1000_remove),

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#ifdef CONFIG_PM

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	/* Power Management Hooks */

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	.suspend  = e1000_suspend,

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	.resume   = e1000_resume,

   215

#endif

   216

	.shutdown = e1000_shutdown,

   217

	.err_handler = &e1000_err_handler

   218

};

   219

   220

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

   221

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

   222

MODULE_LICENSE("GPL");

   223

MODULE_VERSION(DRV_VERSION);

   224

   225

static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;

   226

module_param(debug, int, 0);

   227

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

   228

   229

/**

   230

 * e1000_get_hw_dev - return device

   231

 * used by hardware layer to print debugging information

   232

 *

   233

 **/

   234

struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)

   235

{

   236

	struct e1000_adapter *adapter = hw->back;

   237

	return adapter->netdev;

   238

}

   239

   240

/**

   241

 * e1000_init_module - Driver Registration Routine

   242

 *

   243

 * e1000_init_module is the first routine called when the driver is

   244

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

   245

 **/

   246

   247

static int __init e1000_init_module(void)

   248

{

   249

	int ret;

   250

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

   251

   252

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

   253

   254

	ret = pci_register_driver(&e1000_driver);

   255

	if (copybreak != COPYBREAK_DEFAULT) {

   256

		if (copybreak == 0)

   257

			pr_info("copybreak disabled\n");

   258

		else

   259

			pr_info("copybreak enabled for "

   260

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

   261

	}

   262

	return ret;

   263

}

   264

   265

module_init(e1000_init_module);

   266

   267

/**

   268

 * e1000_exit_module - Driver Exit Cleanup Routine

   269

 *

   270

 * e1000_exit_module is called just before the driver is removed

   271

 * from memory.

   272

 **/

   273

   274

static void __exit e1000_exit_module(void)

   275

{

   276

	pci_unregister_driver(&e1000_driver);

   277

}

   278

   279

module_exit(e1000_exit_module);

   280

   281

static int e1000_request_irq(struct e1000_adapter *adapter)

   282

{

   283

	struct net_device *netdev = adapter->netdev;

   284

	irq_handler_t handler = e1000_intr;

   285

	int irq_flags = IRQF_SHARED;

   286

	int err;

   287

   288

	if (adapter->ecdev) {

   289

		return 0;

   290

	}

   291

   292

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

   293

	                  netdev);

   294

	if (err) {

   295

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

   296

	}

   297

   298

	return err;

   299

}

   300

   301

static void e1000_free_irq(struct e1000_adapter *adapter)

   302

{

   303

	struct net_device *netdev = adapter->netdev;

   304

   305

	if (adapter->ecdev) {

   306

		return;

   307

	}

   308

   309

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

   310

}

   311

   312

/**

   313

 * e1000_irq_disable - Mask off interrupt generation on the NIC

   314

 * @adapter: board private structure

   315

 **/

   316

   317

static void e1000_irq_disable(struct e1000_adapter *adapter)

   318

{

   319

	struct e1000_hw *hw = &adapter->hw;

   320

   321

	if (adapter->ecdev) {

   322

		return;

   323

	}

   324

   325

	ew32(IMC, ~0);

   326

	E1000_WRITE_FLUSH();

   327

	synchronize_irq(adapter->pdev->irq);

   328

}

   329

   330

/**

   331

 * e1000_irq_enable - Enable default interrupt generation settings

   332

 * @adapter: board private structure

   333

 **/

   334

   335

static void e1000_irq_enable(struct e1000_adapter *adapter)

   336

{

   337

	struct e1000_hw *hw = &adapter->hw;

   338

   339

	if (adapter->ecdev) {

   340

		return;

   341

	}

   342

   343

	ew32(IMS, IMS_ENABLE_MASK);

   344

	E1000_WRITE_FLUSH();

   345

}

   346

   347

static void e1000_update_mng_vlan(struct e1000_adapter *adapter)

   348

{

   349

	struct e1000_hw *hw = &adapter->hw;

   350

	struct net_device *netdev = adapter->netdev;

   351

	u16 vid = hw->mng_cookie.vlan_id;

   352

	u16 old_vid = adapter->mng_vlan_id;

   353

	if (adapter->vlgrp) {

   354

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

   355

			if (hw->mng_cookie.status &

   356

				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   357

				e1000_vlan_rx_add_vid(netdev, vid);

   358

				adapter->mng_vlan_id = vid;

   359

			} else

   360

				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   361

   362

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

   363

					(vid != old_vid) &&

   364

			    !vlan_group_get_device(adapter->vlgrp, old_vid))

   365

				e1000_vlan_rx_kill_vid(netdev, old_vid);

   366

		} else

   367

			adapter->mng_vlan_id = vid;

   368

	}

   369

}

   370

   371

static void e1000_init_manageability(struct e1000_adapter *adapter)

   372

{

   373

	struct e1000_hw *hw = &adapter->hw;

   374

   375

	if (adapter->en_mng_pt) {

   376

		u32 manc = er32(MANC);

   377

   378

		/* disable hardware interception of ARP */

   379

		manc &= ~(E1000_MANC_ARP_EN);

   380

   381

		ew32(MANC, manc);

   382

	}

   383

}

   384

   385

static void e1000_release_manageability(struct e1000_adapter *adapter)

   386

{

   387

	struct e1000_hw *hw = &adapter->hw;

   388

   389

	if (adapter->en_mng_pt) {

   390

		u32 manc = er32(MANC);

   391

   392

		/* re-enable hardware interception of ARP */

   393

		manc |= E1000_MANC_ARP_EN;

   394

   395

		ew32(MANC, manc);

   396

	}

   397

}

   398

   399

/**

   400

 * e1000_configure - configure the hardware for RX and TX

   401

 * @adapter = private board structure

   402

 **/

   403

static void e1000_configure(struct e1000_adapter *adapter)

   404

{

   405

	struct net_device *netdev = adapter->netdev;

   406

	int i;

   407

   408

	e1000_set_rx_mode(netdev);

   409

   410

	e1000_restore_vlan(adapter);

   411

	e1000_init_manageability(adapter);

   412

   413

	e1000_configure_tx(adapter);

   414

	e1000_setup_rctl(adapter);

   415

	e1000_configure_rx(adapter);

   416

	/* call E1000_DESC_UNUSED which always leaves

   417

	 * at least 1 descriptor unused to make sure

   418

	 * next_to_use != next_to_clean */

   419

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

   420

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

   421

		if (adapter->ecdev) {

   422

			/* fill rx ring completely! */

   423

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

   424

		} else {

   425

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

   426

			adapter->alloc_rx_buf(adapter, ring,

   427

					E1000_DESC_UNUSED(ring));

   428

		}

   429

	}

   430

}

   431

   432

int e1000_up(struct e1000_adapter *adapter)

   433

{

   434

	struct e1000_hw *hw = &adapter->hw;

   435

   436

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

   437

	e1000_configure(adapter);

   438

   439

	clear_bit(__E1000_DOWN, &adapter->flags);

   440

   441

	if (!adapter->ecdev) {

   442

		napi_enable(&adapter->napi);

   443

   444

		e1000_irq_enable(adapter);

   445

   446

		netif_wake_queue(adapter->netdev);

   447

   448

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

   449

		ew32(ICS, E1000_ICS_LSC);

   450

	}

   451

	return 0;

   452

}

   453

   454

/**

   455

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

   456

 * @adapter: address of board private structure

   457

 *

   458

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

   459

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

   460

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

   461

 *

   462

 **/

   463

   464

void e1000_power_up_phy(struct e1000_adapter *adapter)

   465

{

   466

	struct e1000_hw *hw = &adapter->hw;

   467

	u16 mii_reg = 0;

   468

   469

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

   470

	if (hw->media_type == e1000_media_type_copper) {

   471

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

   472

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

   473

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   474

		mii_reg &= ~MII_CR_POWER_DOWN;

   475

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   476

	}

   477

}

   478

   479

static void e1000_power_down_phy(struct e1000_adapter *adapter)

   480

{

   481

	struct e1000_hw *hw = &adapter->hw;

   482

   483

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

   484

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

   485

	 * (a) WoL is enabled

   486

	 * (b) AMT is active

   487

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

   488

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

   489

	   hw->media_type == e1000_media_type_copper) {

   490

		u16 mii_reg = 0;

   491

   492

		switch (hw->mac_type) {

   493

		case e1000_82540:

   494

		case e1000_82545:

   495

		case e1000_82545_rev_3:

   496

		case e1000_82546:

   497

		case e1000_ce4100:

   498

		case e1000_82546_rev_3:

   499

		case e1000_82541:

   500

		case e1000_82541_rev_2:

   501

		case e1000_82547:

   502

		case e1000_82547_rev_2:

   503

			if (er32(MANC) & E1000_MANC_SMBUS_EN)

   504

				goto out;

   505

			break;

   506

		default:

   507

			goto out;

   508

		}

   509

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   510

		mii_reg |= MII_CR_POWER_DOWN;

   511

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   512

		mdelay(1);

   513

	}

   514

out:

   515

	return;

   516

}

   517

   518

void e1000_down(struct e1000_adapter *adapter)

   519

{

   520

	struct e1000_hw *hw = &adapter->hw;

   521

	struct net_device *netdev = adapter->netdev;

   522

	u32 rctl, tctl;

   523

   524

   525

	/* disable receives in the hardware */	

   526

	rctl = er32(RCTL);

   527

	ew32(RCTL, rctl & ~E1000_RCTL_EN);

   528

   529

	if (!adapter->ecdev) {