1/* SPDX-License-Identifier: GPL-2.0+ */
   2/* Copyright (C) 2018 Microchip Technology Inc. */
   3
   4#include <linux/module.h>
   5#include <linux/pci.h>
   6#include <linux/netdevice.h>
   7#include <linux/etherdevice.h>
   8#include <linux/crc32.h>
   9#include <linux/microchipphy.h>
  10#include <linux/net_tstamp.h>
  11#include <linux/phy.h>
  12#include <linux/rtnetlink.h>
  13#include <linux/iopoll.h>
  14#include "lan743x_main.h"
  15
  16static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  17{
  18	pci_release_selected_regions(adapter->pdev,
  19				     pci_select_bars(adapter->pdev,
  20						     IORESOURCE_MEM));
  21	pci_disable_device(adapter->pdev);
  22}
  23
  24static int lan743x_pci_init(struct lan743x_adapter *adapter,
  25			    struct pci_dev *pdev)
  26{
  27	unsigned long bars = 0;
  28	int ret;
  29
  30	adapter->pdev = pdev;
  31	ret = pci_enable_device_mem(pdev);
  32	if (ret)
  33		goto return_error;
  34
  35	netif_info(adapter, probe, adapter->netdev,
  36		   "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
  37		   pdev->vendor, pdev->device);
  38	bars = pci_select_bars(pdev, IORESOURCE_MEM);
  39	if (!test_bit(0, &bars))
  40		goto disable_device;
  41
  42	ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
  43	if (ret)
  44		goto disable_device;
  45
  46	pci_set_master(pdev);
  47	return 0;
  48
  49disable_device:
  50	pci_disable_device(adapter->pdev);
  51
  52return_error:
  53	return ret;
  54}
  55
  56static u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
  57{
  58	return ioread32(&adapter->csr.csr_address[offset]);
  59}
  60
  61static void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
  62			      u32 data)
  63{
  64	iowrite32(data, &adapter->csr.csr_address[offset]);
  65}
  66
  67#define LAN743X_CSR_READ_OP(offset)	lan743x_csr_read(adapter, offset)
  68
  69static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
  70{
  71	u32 data;
  72
  73	data = lan743x_csr_read(adapter, HW_CFG);
  74	data |= HW_CFG_LRST_;
  75	lan743x_csr_write(adapter, HW_CFG, data);
  76
  77	return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
  78				  !(data & HW_CFG_LRST_), 100000, 10000000);
  79}
  80
  81static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
  82				    int offset, u32 bit_mask,
  83				    int target_value, int usleep_min,
  84				    int usleep_max, int count)
  85{
  86	u32 data;
  87
  88	return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
  89				  target_value == ((data & bit_mask) ? 1 : 0),
  90				  usleep_max, usleep_min * count);
  91}
  92
  93static int lan743x_csr_init(struct lan743x_adapter *adapter)
  94{
  95	struct lan743x_csr *csr = &adapter->csr;
  96	resource_size_t bar_start, bar_length;
  97	int result;
  98
  99	bar_start = pci_resource_start(adapter->pdev, 0);
 100	bar_length = pci_resource_len(adapter->pdev, 0);
 101	csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 102					bar_start, bar_length);
 103	if (!csr->csr_address) {
 104		result = -ENOMEM;
 105		goto clean_up;
 106	}
 107
 108	csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 109	csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 110	netif_info(adapter, probe, adapter->netdev,
 111		   "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 112		   csr->id_rev,	FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 113		   FPGA_REV_GET_MINOR_(csr->fpga_rev));
 114	if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 115		result = -ENODEV;
 116		goto clean_up;
 117	}
 118
 119	csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 120	switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 121	case ID_REV_CHIP_REV_A0_:
 122		csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 123		csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 124		break;
 125	case ID_REV_CHIP_REV_B0_:
 126		csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 127		break;
 128	}
 129
 130	result = lan743x_csr_light_reset(adapter);
 131	if (result)
 132		goto clean_up;
 133	return 0;
 134clean_up:
 135	return result;
 136}
 137
 138static void lan743x_intr_software_isr(void *context)
 139{
 140	struct lan743x_adapter *adapter = context;
 141	struct lan743x_intr *intr = &adapter->intr;
 142	u32 int_sts;
 143
 144	int_sts = lan743x_csr_read(adapter, INT_STS);
 145	if (int_sts & INT_BIT_SW_GP_) {
 146		lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
 147		intr->software_isr_flag = 1;
 148	}
 149}
 150
 151static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 152{
 153	struct lan743x_tx *tx = context;
 154	struct lan743x_adapter *adapter = tx->adapter;
 155	bool enable_flag = true;
 156	u32 int_en = 0;
 157
 158	int_en = lan743x_csr_read(adapter, INT_EN_SET);
 159	if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 160		lan743x_csr_write(adapter, INT_EN_CLR,
 161				  INT_BIT_DMA_TX_(tx->channel_number));
 162	}
 163
 164	if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 165		u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 166		u32 dmac_int_sts;
 167		u32 dmac_int_en;
 168
 169		if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 170			dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 171		else
 172			dmac_int_sts = ioc_bit;
 173		if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 174			dmac_int_en = lan743x_csr_read(adapter,
 175						       DMAC_INT_EN_SET);
 176		else
 177			dmac_int_en = ioc_bit;
 178
 179		dmac_int_en &= ioc_bit;
 180		dmac_int_sts &= dmac_int_en;
 181		if (dmac_int_sts & ioc_bit) {
 182			napi_schedule(&tx->napi);
 183			enable_flag = false;/* poll func will enable later */
 184		}
 185	}
 186
 187	if (enable_flag)
 188		/* enable isr */
 189		lan743x_csr_write(adapter, INT_EN_SET,
 190				  INT_BIT_DMA_TX_(tx->channel_number));
 191}
 192
 193static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 194{
 195	struct lan743x_rx *rx = context;
 196	struct lan743x_adapter *adapter = rx->adapter;
 197	bool enable_flag = true;
 198
 199	if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 200		lan743x_csr_write(adapter, INT_EN_CLR,
 201				  INT_BIT_DMA_RX_(rx->channel_number));
 202	}
 203
 204	if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 205		u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 206		u32 dmac_int_sts;
 207		u32 dmac_int_en;
 208
 209		if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 210			dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 211		else
 212			dmac_int_sts = rx_frame_bit;
 213		if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 214			dmac_int_en = lan743x_csr_read(adapter,
 215						       DMAC_INT_EN_SET);
 216		else
 217			dmac_int_en = rx_frame_bit;
 218
 219		dmac_int_en &= rx_frame_bit;
 220		dmac_int_sts &= dmac_int_en;
 221		if (dmac_int_sts & rx_frame_bit) {
 222			napi_schedule(&rx->napi);
 223			enable_flag = false;/* poll funct will enable later */
 224		}
 225	}
 226
 227	if (enable_flag) {
 228		/* enable isr */
 229		lan743x_csr_write(adapter, INT_EN_SET,
 230				  INT_BIT_DMA_RX_(rx->channel_number));
 231	}
 232}
 233
 234static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 235{
 236	struct lan743x_adapter *adapter = context;
 237	unsigned int channel;
 238
 239	if (int_sts & INT_BIT_ALL_RX_) {
 240		for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 241			channel++) {
 242			u32 int_bit = INT_BIT_DMA_RX_(channel);
 243
 244			if (int_sts & int_bit) {
 245				lan743x_rx_isr(&adapter->rx[channel],
 246					       int_bit, flags);
 247				int_sts &= ~int_bit;
 248			}
 249		}
 250	}
 251	if (int_sts & INT_BIT_ALL_TX_) {
 252		for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
 253			channel++) {
 254			u32 int_bit = INT_BIT_DMA_TX_(channel);
 255
 256			if (int_sts & int_bit) {
 257				lan743x_tx_isr(&adapter->tx[channel],
 258					       int_bit, flags);
 259				int_sts &= ~int_bit;
 260			}
 261		}
 262	}
 263	if (int_sts & INT_BIT_ALL_OTHER_) {
 264		if (int_sts & INT_BIT_SW_GP_) {
 265			lan743x_intr_software_isr(adapter);
 266			int_sts &= ~INT_BIT_SW_GP_;
 267		}
 268	}
 269	if (int_sts)
 270		lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 271}
 272
 273static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 274{
 275	struct lan743x_vector *vector = ptr;
 276	struct lan743x_adapter *adapter = vector->adapter;
 277	irqreturn_t result = IRQ_NONE;
 278	u32 int_enables;
 279	u32 int_sts;
 280
 281	if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 282		int_sts = lan743x_csr_read(adapter, INT_STS);
 283	} else if (vector->flags &
 284		   (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 285		   LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 286		int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 287	} else {
 288		/* use mask as implied status */
 289		int_sts = vector->int_mask | INT_BIT_MAS_;
 290	}
 291
 292	if (!(int_sts & INT_BIT_MAS_))
 293		goto irq_done;
 294
 295	if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 296		/* disable vector interrupt */
 297		lan743x_csr_write(adapter,
 298				  INT_VEC_EN_CLR,
 299				  INT_VEC_EN_(vector->vector_index));
 300
 301	if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 302		/* disable master interrupt */
 303		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 304
 305	if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 306		int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 307	} else {
 308		/*  use vector mask as implied enable mask */
 309		int_enables = vector->int_mask;
 310	}
 311
 312	int_sts &= int_enables;
 313	int_sts &= vector->int_mask;
 314	if (int_sts) {
 315		if (vector->handler) {
 316			vector->handler(vector->context,
 317					int_sts, vector->flags);
 318		} else {
 319			/* disable interrupts on this vector */
 320			lan743x_csr_write(adapter, INT_EN_CLR,
 321					  vector->int_mask);
 322		}
 323		result = IRQ_HANDLED;
 324	}
 325
 326	if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 327		/* enable master interrupt */
 328		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 329
 330	if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 331		/* enable vector interrupt */
 332		lan743x_csr_write(adapter,
 333				  INT_VEC_EN_SET,
 334				  INT_VEC_EN_(vector->vector_index));
 335irq_done:
 336	return result;
 337}
 338
 339static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 340{
 341	struct lan743x_intr *intr = &adapter->intr;
 342	int result = -ENODEV;
 343	int timeout = 10;
 344
 345	intr->software_isr_flag = 0;
 346
 347	/* enable interrupt */
 348	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 349
 350	/* activate interrupt here */
 351	lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 352	while ((timeout > 0) && (!(intr->software_isr_flag))) {
 353		usleep_range(1000, 20000);
 354		timeout--;
 355	}
 356
 357	if (intr->software_isr_flag)
 358		result = 0;
 359
 360	/* disable interrupts */
 361	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 362	return result;
 363}
 364
 365static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 366				     int vector_index, u32 flags,
 367				     u32 int_mask,
 368				     lan743x_vector_handler handler,
 369				     void *context)
 370{
 371	struct lan743x_vector *vector = &adapter->intr.vector_list
 372					[vector_index];
 373	int ret;
 374
 375	vector->adapter = adapter;
 376	vector->flags = flags;
 377	vector->vector_index = vector_index;
 378	vector->int_mask = int_mask;
 379	vector->handler = handler;
 380	vector->context = context;
 381
 382	ret = request_irq(vector->irq,
 383			  lan743x_intr_entry_isr,
 384			  (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 385			  IRQF_SHARED : 0, DRIVER_NAME, vector);
 386	if (ret) {
 387		vector->handler = NULL;
 388		vector->context = NULL;
 389		vector->int_mask = 0;
 390		vector->flags = 0;
 391	}
 392	return ret;
 393}
 394
 395static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 396					int vector_index)
 397{
 398	struct lan743x_vector *vector = &adapter->intr.vector_list
 399					[vector_index];
 400
 401	free_irq(vector->irq, vector);
 402	vector->handler = NULL;
 403	vector->context = NULL;
 404	vector->int_mask = 0;
 405	vector->flags = 0;
 406}
 407
 408static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 409					 u32 int_mask)
 410{
 411	int index;
 412
 413	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 414		if (adapter->intr.vector_list[index].int_mask & int_mask)
 415			return adapter->intr.vector_list[index].flags;
 416	}
 417	return 0;
 418}
 419
 420static void lan743x_intr_close(struct lan743x_adapter *adapter)
 421{
 422	struct lan743x_intr *intr = &adapter->intr;
 423	int index = 0;
 424
 425	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 426	lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 427
 428	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 429		if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 430			lan743x_intr_unregister_isr(adapter, index);
 431			intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 432		}
 433	}
 434
 435	if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 436		pci_disable_msi(adapter->pdev);
 437		intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 438	}
 439
 440	if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 441		pci_disable_msix(adapter->pdev);
 442		intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 443	}
 444}
 445
 446static int lan743x_intr_open(struct lan743x_adapter *adapter)
 447{
 448	struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
 449	struct lan743x_intr *intr = &adapter->intr;
 450	u32 int_vec_en_auto_clr = 0;
 451	u32 int_vec_map0 = 0;
 452	u32 int_vec_map1 = 0;
 453	int ret = -ENODEV;
 454	int index = 0;
 455	u32 flags = 0;
 456
 457	intr->number_of_vectors = 0;
 458
 459	/* Try to set up MSIX interrupts */
 460	memset(&msix_entries[0], 0,
 461	       sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
 462	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
 463		msix_entries[index].entry = index;
 464	ret = pci_enable_msix_range(adapter->pdev,
 465				    msix_entries, 1,
 466				    1 + LAN743X_USED_TX_CHANNELS +
 467				    LAN743X_USED_RX_CHANNELS);
 468
 469	if (ret > 0) {
 470		intr->flags |= INTR_FLAG_MSIX_ENABLED;
 471		intr->number_of_vectors = ret;
 472		intr->using_vectors = true;
 473		for (index = 0; index < intr->number_of_vectors; index++)
 474			intr->vector_list[index].irq = msix_entries
 475						       [index].vector;
 476		netif_info(adapter, ifup, adapter->netdev,
 477			   "using MSIX interrupts, number of vectors = %d\n",
 478			   intr->number_of_vectors);
 479	}
 480
 481	/* If MSIX failed try to setup using MSI interrupts */
 482	if (!intr->number_of_vectors) {
 483		if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 484			if (!pci_enable_msi(adapter->pdev)) {
 485				intr->flags |= INTR_FLAG_MSI_ENABLED;
 486				intr->number_of_vectors = 1;
 487				intr->using_vectors = true;
 488				intr->vector_list[0].irq =
 489					adapter->pdev->irq;
 490				netif_info(adapter, ifup, adapter->netdev,
 491					   "using MSI interrupts, number of vectors = %d\n",
 492					   intr->number_of_vectors);
 493			}
 494		}
 495	}
 496
 497	/* If MSIX, and MSI failed, setup using legacy interrupt */
 498	if (!intr->number_of_vectors) {
 499		intr->number_of_vectors = 1;
 500		intr->using_vectors = false;
 501		intr->vector_list[0].irq = intr->irq;
 502		netif_info(adapter, ifup, adapter->netdev,
 503			   "using legacy interrupts\n");
 504	}
 505
 506	/* At this point we must have at least one irq */
 507	lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 508
 509	/* map all interrupts to vector 0 */
 510	lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 511	lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 512	lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 513	flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 514		LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 515		LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 516		LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 517
 518	if (intr->using_vectors) {
 519		flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 520			 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 521	} else {
 522		flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 523			 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 524			 LAN743X_VECTOR_FLAG_IRQ_SHARED;
 525	}
 526
 527	if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 528		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 529		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 530		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 531		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 532		flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 533		flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 534	}
 535
 536	ret = lan743x_intr_register_isr(adapter, 0, flags,
 537					INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 538					INT_BIT_ALL_OTHER_,
 539					lan743x_intr_shared_isr, adapter);
 540	if (ret)
 541		goto clean_up;
 542	intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 543
 544	if (intr->using_vectors)
 545		lan743x_csr_write(adapter, INT_VEC_EN_SET,
 546				  INT_VEC_EN_(0));
 547
 548	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 549		lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 550		lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 551		lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 552		lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 553		lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 554		lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 555		lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 556		lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 557		lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 558		lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 559		lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 560	}
 561
 562	/* enable interrupts */
 563	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 564	ret = lan743x_intr_test_isr(adapter);
 565	if (ret)
 566		goto clean_up;
 567
 568	if (intr->number_of_vectors > 1) {
 569		int number_of_tx_vectors = intr->number_of_vectors - 1;
 570
 571		if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
 572			number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
 573		flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 574			LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 575			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 576			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 577			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 578			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 579
 580		if (adapter->csr.flags &
 581		   LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 582			flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 583				LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 584				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 585				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 586				LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 587		}
 588
 589		for (index = 0; index < number_of_tx_vectors; index++) {
 590			u32 int_bit = INT_BIT_DMA_TX_(index);
 591			int vector = index + 1;
 592
 593			/* map TX interrupt to vector */
 594			int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 595			lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 596			if (flags &
 597			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 598				int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 599				lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 600						  int_vec_en_auto_clr);
 601			}
 602
 603			/* Remove TX interrupt from shared mask */
 604			intr->vector_list[0].int_mask &= ~int_bit;
 605			ret = lan743x_intr_register_isr(adapter, vector, flags,
 606							int_bit, lan743x_tx_isr,
 607							&adapter->tx[index]);
 608			if (ret)
 609				goto clean_up;
 610			intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 611			if (!(flags &
 612			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 613				lan743x_csr_write(adapter, INT_VEC_EN_SET,
 614						  INT_VEC_EN_(vector));
 615		}
 616	}
 617	if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
 618		int number_of_rx_vectors = intr->number_of_vectors -
 619					   LAN743X_USED_TX_CHANNELS - 1;
 620
 621		if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 622			number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 623
 624		flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 625			LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 626			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 627			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 628			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 629			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 630
 631		if (adapter->csr.flags &
 632		    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 633			flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 634				LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 635				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 636				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 637				LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 638		}
 639		for (index = 0; index < number_of_rx_vectors; index++) {
 640			int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
 641			u32 int_bit = INT_BIT_DMA_RX_(index);
 642
 643			/* map RX interrupt to vector */
 644			int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 645			lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 646			if (flags &
 647			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 648				int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 649				lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 650						  int_vec_en_auto_clr);
 651			}
 652
 653			/* Remove RX interrupt from shared mask */
 654			intr->vector_list[0].int_mask &= ~int_bit;
 655			ret = lan743x_intr_register_isr(adapter, vector, flags,
 656							int_bit, lan743x_rx_isr,
 657							&adapter->rx[index]);
 658			if (ret)
 659				goto clean_up;
 660			intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 661
 662			lan743x_csr_write(adapter, INT_VEC_EN_SET,
 663					  INT_VEC_EN_(vector));
 664		}
 665	}
 666	return 0;
 667
 668clean_up:
 669	lan743x_intr_close(adapter);
 670	return ret;
 671}
 672
 673static int lan743x_dp_write(struct lan743x_adapter *adapter,
 674			    u32 select, u32 addr, u32 length, u32 *buf)
 675{
 676	int ret = -EIO;
 677	u32 dp_sel;
 678	int i;
 679
 680	mutex_lock(&adapter->dp_lock);
 681	if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 682				     1, 40, 100, 100))
 683		goto unlock;
 684	dp_sel = lan743x_csr_read(adapter, DP_SEL);
 685	dp_sel &= ~DP_SEL_MASK_;
 686	dp_sel |= select;
 687	lan743x_csr_write(adapter, DP_SEL, dp_sel);
 688
 689	for (i = 0; i < length; i++) {
 690		lan743x_csr_write(adapter, DP_ADDR, addr + i);
 691		lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 692		lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 693		if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 694					     1, 40, 100, 100))
 695			goto unlock;
 696	}
 697	ret = 0;
 698
 699unlock:
 700	mutex_unlock(&adapter->dp_lock);
 701	return ret;
 702}
 703
 704static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 705{
 706	u32 ret;
 707
 708	ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 709		MAC_MII_ACC_PHY_ADDR_MASK_;
 710	ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 711		MAC_MII_ACC_MIIRINDA_MASK_;
 712
 713	if (read)
 714		ret |= MAC_MII_ACC_MII_READ_;
 715	else
 716		ret |= MAC_MII_ACC_MII_WRITE_;
 717	ret |= MAC_MII_ACC_MII_BUSY_;
 718
 719	return ret;
 720}
 721
 722static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 723{
 724	u32 data;
 725
 726	return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 727				  !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 728}
 729
 730static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 731{
 732	struct lan743x_adapter *adapter = bus->priv;
 733	u32 val, mii_access;
 734	int ret;
 735
 736	/* comfirm MII not busy */
 737	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 738	if (ret < 0)
 739		return ret;
 740
 741	/* set the address, index & direction (read from PHY) */
 742	mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 743	lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 744	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 745	if (ret < 0)
 746		return ret;
 747
 748	val = lan743x_csr_read(adapter, MAC_MII_DATA);
 749	return (int)(val & 0xFFFF);
 750}
 751
 752static int lan743x_mdiobus_write(struct mii_bus *bus,
 753				 int phy_id, int index, u16 regval)
 754{
 755	struct lan743x_adapter *adapter = bus->priv;
 756	u32 val, mii_access;
 757	int ret;
 758
 759	/* confirm MII not busy */
 760	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 761	if (ret < 0)
 762		return ret;
 763	val = (u32)regval;
 764	lan743x_csr_write(adapter, MAC_MII_DATA, val);
 765
 766	/* set the address, index & direction (write to PHY) */
 767	mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 768	lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 769	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 770	return ret;
 771}
 772
 773static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 774				    u8 *addr)
 775{
 776	u32 addr_lo, addr_hi;
 777
 778	addr_lo = addr[0] |
 779		addr[1] << 8 |
 780		addr[2] << 16 |
 781		addr[3] << 24;
 782	addr_hi = addr[4] |
 783		addr[5] << 8;
 784	lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 785	lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 786
 787	ether_addr_copy(adapter->mac_address, addr);
 788	netif_info(adapter, drv, adapter->netdev,
 789		   "MAC address set to %pM\n", addr);
 790}
 791
 792static int lan743x_mac_init(struct lan743x_adapter *adapter)
 793{
 794	bool mac_address_valid = true;
 795	struct net_device *netdev;
 796	u32 mac_addr_hi = 0;
 797	u32 mac_addr_lo = 0;
 798	u32 data;
 799	int ret;
 800
 801	netdev = adapter->netdev;
 802	lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
 803	ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
 804				       0, 1000, 20000, 100);
 805	if (ret)
 806		return ret;
 807
 808	/* setup auto duplex, and speed detection */
 809	data = lan743x_csr_read(adapter, MAC_CR);
 810	data |= MAC_CR_ADD_ | MAC_CR_ASD_;
 811	data |= MAC_CR_CNTR_RST_;
 812	lan743x_csr_write(adapter, MAC_CR, data);
 813
 814	mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 815	mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 816	adapter->mac_address[0] = mac_addr_lo & 0xFF;
 817	adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 818	adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 819	adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 820	adapter->mac_address[4] = mac_addr_hi & 0xFF;
 821	adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 822
 823	if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 824	    mac_addr_lo == 0xFFFFFFFF) {
 825		mac_address_valid = false;
 826	} else if (!is_valid_ether_addr(adapter->mac_address)) {
 827		mac_address_valid = false;
 828	}
 829
 830	if (!mac_address_valid)
 831		random_ether_addr(adapter->mac_address);
 832	lan743x_mac_set_address(adapter, adapter->mac_address);
 833	ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 834	return 0;
 835}
 836
 837static int lan743x_mac_open(struct lan743x_adapter *adapter)
 838{
 839	int ret = 0;
 840	u32 temp;
 841
 842	temp = lan743x_csr_read(adapter, MAC_RX);
 843	lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 844	temp = lan743x_csr_read(adapter, MAC_TX);
 845	lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 846	return ret;
 847}
 848
 849static void lan743x_mac_close(struct lan743x_adapter *adapter)
 850{
 851	u32 temp;
 852
 853	temp = lan743x_csr_read(adapter, MAC_TX);
 854	temp &= ~MAC_TX_TXEN_;
 855	lan743x_csr_write(adapter, MAC_TX, temp);
 856	lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 857				 1, 1000, 20000, 100);
 858
 859	temp = lan743x_csr_read(adapter, MAC_RX);
 860	temp &= ~MAC_RX_RXEN_;
 861	lan743x_csr_write(adapter, MAC_RX, temp);
 862	lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 863				 1, 1000, 20000, 100);
 864}
 865
 866static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 867					      bool tx_enable, bool rx_enable)
 868{
 869	u32 flow_setting = 0;
 870
 871	/* set maximum pause time because when fifo space frees
 872	 * up a zero value pause frame will be sent to release the pause
 873	 */
 874	flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 875	if (tx_enable)
 876		flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 877	if (rx_enable)
 878		flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 879	lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 880}
 881
 882static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 883{
 884	int enabled = 0;
 885	u32 mac_rx = 0;
 886
 887	mac_rx = lan743x_csr_read(adapter, MAC_RX);
 888	if (mac_rx & MAC_RX_RXEN_) {
 889		enabled = 1;
 890		if (mac_rx & MAC_RX_RXD_) {
 891			lan743x_csr_write(adapter, MAC_RX, mac_rx);
 892			mac_rx &= ~MAC_RX_RXD_;
 893		}
 894		mac_rx &= ~MAC_RX_RXEN_;
 895		lan743x_csr_write(adapter, MAC_RX, mac_rx);
 896		lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 897					 1, 1000, 20000, 100);
 898		lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 899	}
 900
 901	mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 902	mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
 903		  MAC_RX_MAX_SIZE_MASK_);
 904	lan743x_csr_write(adapter, MAC_RX, mac_rx);
 905
 906	if (enabled) {
 907		mac_rx |= MAC_RX_RXEN_;
 908		lan743x_csr_write(adapter, MAC_RX, mac_rx);
 909	}
 910	return 0;
 911}
 912
 913/* PHY */
 914static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 915{
 916	u32 data;
 917
 918	/* Only called with in probe, and before mdiobus_register */
 919
 920	data = lan743x_csr_read(adapter, PMT_CTL);
 921	data |= PMT_CTL_ETH_PHY_RST_;
 922	lan743x_csr_write(adapter, PMT_CTL, data);
 923
 924	return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 925				  (!(data & PMT_CTL_ETH_PHY_RST_) &&
 926				  (data & PMT_CTL_READY_)),
 927				  50000, 1000000);
 928}
 929
 930static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 931					   u8 duplex, u16 local_adv,
 932					   u16 remote_adv)
 933{
 934	struct lan743x_phy *phy = &adapter->phy;
 935	u8 cap;
 936
 937	if (phy->fc_autoneg)
 938		cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 939	else
 940		cap = phy->fc_request_control;
 941
 942	lan743x_mac_flow_ctrl_set_enables(adapter,
 943					  cap & FLOW_CTRL_TX,
 944					  cap & FLOW_CTRL_RX);
 945}
 946
 947static int lan743x_phy_init(struct lan743x_adapter *adapter)
 948{
 949	return lan743x_phy_reset(adapter);
 950}
 951
 952static void lan743x_phy_link_status_change(struct net_device *netdev)
 953{
 954	struct lan743x_adapter *adapter = netdev_priv(netdev);
 955	struct phy_device *phydev = netdev->phydev;
 956
 957	phy_print_status(phydev);
 958	if (phydev->state == PHY_RUNNING) {
 959		struct ethtool_link_ksettings ksettings;
 960		int remote_advertisement = 0;
 961		int local_advertisement = 0;
 962
 963		memset(&ksettings, 0, sizeof(ksettings));
 964		phy_ethtool_get_link_ksettings(netdev, &ksettings);
 965		local_advertisement = phy_read(phydev, MII_ADVERTISE);
 966		if (local_advertisement < 0)
 967			return;
 968
 969		remote_advertisement = phy_read(phydev, MII_LPA);
 970		if (remote_advertisement < 0)
 971			return;
 972
 973		lan743x_phy_update_flowcontrol(adapter,
 974					       ksettings.base.duplex,
 975					       local_advertisement,
 976					       remote_advertisement);
 977	}
 978}
 979
 980static void lan743x_phy_close(struct lan743x_adapter *adapter)
 981{
 982	struct net_device *netdev = adapter->netdev;
 983
 984	phy_stop(netdev->phydev);
 985	phy_disconnect(netdev->phydev);
 986	netdev->phydev = NULL;
 987}
 988
 989static int lan743x_phy_open(struct lan743x_adapter *adapter)
 990{
 991	struct lan743x_phy *phy = &adapter->phy;
 992	struct phy_device *phydev;
 993	struct net_device *netdev;
 994	int ret = -EIO;
 995	u32 mii_adv;
 996
 997	netdev = adapter->netdev;
 998	phydev = phy_find_first(adapter->mdiobus);
 999	if (!phydev)
1000		goto return_error;
1001
1002	ret = phy_connect_direct(netdev, phydev,
1003				 lan743x_phy_link_status_change,
1004				 PHY_INTERFACE_MODE_GMII);
1005	if (ret)
1006		goto return_error;
1007
1008	/* MAC doesn't support 1000T Half */
1009	phydev->supported &= ~SUPPORTED_1000baseT_Half;
1010
1011	/* support both flow controls */
1012	phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1013	phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1014	mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
1015	phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
1016	phy->fc_autoneg = phydev->autoneg;
1017
1018	phy_start(phydev);
1019	phy_start_aneg(phydev);
1020	return 0;
1021
1022return_error:
1023	return ret;
1024}
1025
1026static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1027{
1028	u8 *mac_addr;
1029	u32 mac_addr_hi = 0;
1030	u32 mac_addr_lo = 0;
1031
1032	/* Add mac address to perfect Filter */
1033	mac_addr = adapter->mac_address;
1034	mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1035		      (((u32)(mac_addr[1])) << 8) |
1036		      (((u32)(mac_addr[2])) << 16) |
1037		      (((u32)(mac_addr[3])) << 24));
1038	mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1039		      (((u32)(mac_addr[5])) << 8));
1040
1041	lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1042	lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1043			  mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1044}
1045
1046static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1047{
1048	struct net_device *netdev = adapter->netdev;
1049	u32 hash_table[DP_SEL_VHF_HASH_LEN];
1050	u32 rfctl;
1051	u32 data;
1052
1053	rfctl = lan743x_csr_read(adapter, RFE_CTL);
1054	rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1055		 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1056	rfctl |= RFE_CTL_AB_;
1057	if (netdev->flags & IFF_PROMISC) {
1058		rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1059	} else {
1060		if (netdev->flags & IFF_ALLMULTI)
1061			rfctl |= RFE_CTL_AM_;
1062	}
1063
1064	memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1065	if (netdev_mc_count(netdev)) {
1066		struct netdev_hw_addr *ha;
1067		int i;
1068
1069		rfctl |= RFE_CTL_DA_PERFECT_;
1070		i = 1;
1071		netdev_for_each_mc_addr(ha, netdev) {
1072			/* set first 32 into Perfect Filter */
1073			if (i < 33) {
1074				lan743x_csr_write(adapter,
1075						  RFE_ADDR_FILT_HI(i), 0);
1076				data = ha->addr[3];
1077				data = ha->addr[2] | (data << 8);
1078				data = ha->addr[1] | (data << 8);
1079				data = ha->addr[0] | (data << 8);
1080				lan743x_csr_write(adapter,
1081						  RFE_ADDR_FILT_LO(i), data);
1082				data = ha->addr[5];
1083				data = ha->addr[4] | (data << 8);
1084				data |= RFE_ADDR_FILT_HI_VALID_;
1085				lan743x_csr_write(adapter,
1086						  RFE_ADDR_FILT_HI(i), data);
1087			} else {
1088				u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1089					     23) & 0x1FF;
1090				hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1091				rfctl |= RFE_CTL_MCAST_HASH_;
1092			}
1093			i++;
1094		}
1095	}
1096
1097	lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1098			 DP_SEL_VHF_VLAN_LEN,
1099			 DP_SEL_VHF_HASH_LEN, hash_table);
1100	lan743x_csr_write(adapter, RFE_CTL, rfctl);
1101}
1102
1103static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1104{
1105	u32 data = 0;
1106
1107	lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1108	lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1109				 0, 1000, 20000, 100);
1110	switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1111	case DMA_DESCRIPTOR_SPACING_16:
1112		data = DMAC_CFG_MAX_DSPACE_16_;
1113		break;
1114	case DMA_DESCRIPTOR_SPACING_32:
1115		data = DMAC_CFG_MAX_DSPACE_32_;
1116		break;
1117	case DMA_DESCRIPTOR_SPACING_64:
1118		data = DMAC_CFG_MAX_DSPACE_64_;
1119		break;
1120	case DMA_DESCRIPTOR_SPACING_128:
1121		data = DMAC_CFG_MAX_DSPACE_128_;
1122		break;
1123	default:
1124		return -EPERM;
1125	}
1126	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1127		data |= DMAC_CFG_COAL_EN_;
1128	data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1129	data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1130	lan743x_csr_write(adapter, DMAC_CFG, data);
1131	data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1132	data |= DMAC_COAL_CFG_TIMER_TX_START_;
1133	data |= DMAC_COAL_CFG_FLUSH_INTS_;
1134	data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1135	data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1136	data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1137	data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1138	lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1139	data = DMAC_OBFF_TX_THRES_SET_(0x08);
1140	data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1141	lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1142	return 0;
1143}
1144
1145static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1146				     int tx_channel)
1147{
1148	u32 dmac_cmd = 0;
1149
1150	dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1151	return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1152				      DMAC_CMD_START_T_(tx_channel)),
1153				      (dmac_cmd &
1154				      DMAC_CMD_STOP_T_(tx_channel)));
1155}
1156
1157static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1158					     int tx_channel)
1159{
1160	int timeout = 100;
1161	int result = 0;
1162
1163	while (timeout &&
1164	       ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1165	       DMAC_CHANNEL_STATE_STOP_PENDING)) {
1166		usleep_range(1000, 20000);
1167		timeout--;
1168	}
1169	if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1170		result = -ENODEV;
1171	return result;
1172}
1173
1174static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1175				     int rx_channel)
1176{
1177	u32 dmac_cmd = 0;
1178
1179	dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1180	return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1181				      DMAC_CMD_START_R_(rx_channel)),
1182				      (dmac_cmd &
1183				      DMAC_CMD_STOP_R_(rx_channel)));
1184}
1185
1186static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1187					     int rx_channel)
1188{
1189	int timeout = 100;
1190	int result = 0;
1191
1192	while (timeout &&
1193	       ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1194	       DMAC_CHANNEL_STATE_STOP_PENDING)) {
1195		usleep_range(1000, 20000);
1196		timeout--;
1197	}
1198	if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1199		result = -ENODEV;
1200	return result;
1201}
1202
1203static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1204				    int descriptor_index, bool cleanup)
1205{
1206	struct lan743x_tx_buffer_info *buffer_info = NULL;
1207	struct lan743x_tx_descriptor *descriptor = NULL;
1208	u32 descriptor_type = 0;
1209
1210	descriptor = &tx->ring_cpu_ptr[descriptor_index];
1211	buffer_info = &tx->buffer_info[descriptor_index];
1212	if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1213		goto done;
1214
1215	descriptor_type = (descriptor->data0) &
1216			  TX_DESC_DATA0_DTYPE_MASK_;
1217	if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1218		goto clean_up_data_descriptor;
1219	else
1220		goto clear_active;
1221
1222clean_up_data_descriptor:
1223	if (buffer_info->dma_ptr) {
1224		if (buffer_info->flags &
1225		    TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1226			dma_unmap_page(&tx->adapter->pdev->dev,
1227				       buffer_info->dma_ptr,
1228				       buffer_info->buffer_length,
1229				       DMA_TO_DEVICE);
1230		} else {
1231			dma_unmap_single(&tx->adapter->pdev->dev,
1232					 buffer_info->dma_ptr,
1233					 buffer_info->buffer_length,
1234					 DMA_TO_DEVICE);
1235		}
1236		buffer_info->dma_ptr = 0;
1237		buffer_info->buffer_length = 0;
1238	}
1239	if (buffer_info->skb) {
1240		dev_kfree_skb(buffer_info->skb);
1241		buffer_info->skb = NULL;
1242	}
1243
1244clear_active:
1245	buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1246
1247done:
1248	memset(buffer_info, 0, sizeof(*buffer_info));
1249	memset(descriptor, 0, sizeof(*descriptor));
1250}
1251
1252static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1253{
1254	return ((++index) % tx->ring_size);
1255}
1256
1257static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1258{
1259	while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1260		lan743x_tx_release_desc(tx, tx->last_head, false);
1261		tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1262	}
1263}
1264
1265static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1266{
1267	u32 original_head = 0;
1268
1269	original_head = tx->last_head;
1270	do {
1271		lan743x_tx_release_desc(tx, tx->last_head, true);
1272		tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1273	} while (tx->last_head != original_head);
1274	memset(tx->ring_cpu_ptr, 0,
1275	       sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1276	memset(tx->buffer_info, 0,
1277	       sizeof(*tx->buffer_info) * (tx->ring_size));
1278}
1279
1280static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1281				   struct sk_buff *skb)
1282{
1283	int result = 1; /* 1 for the main skb buffer */
1284	int nr_frags = 0;
1285
1286	if (skb_is_gso(skb))
1287		result++; /* requires an extension descriptor */
1288	nr_frags = skb_shinfo(skb)->nr_frags;
1289	result += nr_frags; /* 1 for each fragment buffer */
1290	return result;
1291}
1292
1293static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1294{
1295	int last_head = tx->last_head;
1296	int last_tail = tx->last_tail;
1297
1298	if (last_tail >= last_head)
1299		return tx->ring_size - last_tail + last_head - 1;
1300	else
1301		return last_head - last_tail - 1;
1302}
1303
1304static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1305				  unsigned char *first_buffer,
1306				  unsigned int first_buffer_length,
1307				  unsigned int frame_length,
1308				  bool check_sum)
1309{
1310	/* called only from within lan743x_tx_xmit_frame.
1311	 * assuming tx->ring_lock has already been acquired.
1312	 */
1313	struct lan743x_tx_descriptor *tx_descriptor = NULL;
1314	struct lan743x_tx_buffer_info *buffer_info = NULL;
1315	struct lan743x_adapter *adapter = tx->adapter;
1316	struct device *dev = &adapter->pdev->dev;
1317	dma_addr_t dma_ptr;
1318
1319	tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1320	tx->frame_first = tx->last_tail;
1321	tx->frame_tail = tx->frame_first;
1322
1323	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1324	buffer_info = &tx->buffer_info[tx->frame_tail];
1325	dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1326				 DMA_TO_DEVICE);
1327	if (dma_mapping_error(dev, dma_ptr))
1328		return -ENOMEM;
1329
1330	tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1331	tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1332	tx_descriptor->data3 = (frame_length << 16) &
1333		TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1334
1335	buffer_info->skb = NULL;
1336	buffer_info->dma_ptr = dma_ptr;
1337	buffer_info->buffer_length = first_buffer_length;
1338	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1339
1340	tx->frame_data0 = (first_buffer_length &
1341		TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1342		TX_DESC_DATA0_DTYPE_DATA_ |
1343		TX_DESC_DATA0_FS_ |
1344		TX_DESC_DATA0_FCS_;
1345
1346	if (check_sum)
1347		tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1348				   TX_DESC_DATA0_IPE_ |
1349				   TX_DESC_DATA0_TPE_;
1350
1351	/* data0 will be programmed in one of other frame assembler functions */
1352	return 0;
1353}
1354
1355static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1356				     unsigned int frame_length)
1357{
1358	/* called only from within lan743x_tx_xmit_frame.
1359	 * assuming tx->ring_lock has already been acquired.
1360	 */
1361	struct lan743x_tx_descriptor *tx_descriptor = NULL;
1362	struct lan743x_tx_buffer_info *buffer_info = NULL;
1363
1364	/* wrap up previous descriptor */
1365	tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1366	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1367	tx_descriptor->data0 = tx->frame_data0;
1368
1369	/* move to next descriptor */
1370	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1371	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1372	buffer_info = &tx->buffer_info[tx->frame_tail];
1373
1374	/* add extension descriptor */
1375	tx_descriptor->data1 = 0;
1376	tx_descriptor->data2 = 0;
1377	tx_descriptor->data3 = 0;
1378
1379	buffer_info->skb = NULL;
1380	buffer_info->dma_ptr = 0;
1381	buffer_info->buffer_length = 0;
1382	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1383
1384	tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1385			  TX_DESC_DATA0_DTYPE_EXT_ |
1386			  TX_DESC_DATA0_EXT_LSO_;
1387
1388	/* data0 will be programmed in one of other frame assembler functions */
1389}
1390
1391static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1392					 const struct skb_frag_struct *fragment,
1393					 unsigned int frame_length)
1394{
1395	/* called only from within lan743x_tx_xmit_frame
1396	 * assuming tx->ring_lock has already been acquired
1397	 */
1398	struct lan743x_tx_descriptor *tx_descriptor = NULL;
1399	struct lan743x_tx_buffer_info *buffer_info = NULL;
1400	struct lan743x_adapter *adapter = tx->adapter;
1401	struct device *dev = &adapter->pdev->dev;
1402	unsigned int fragment_length = 0;
1403	dma_addr_t dma_ptr;
1404
1405	fragment_length = skb_frag_size(fragment);
1406	if (!fragment_length)
1407		return 0;
1408
1409	/* wrap up previous descriptor */
1410	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1411	tx_descriptor->data0 = tx->frame_data0;
1412
1413	/* move to next descriptor */
1414	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1415	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1416	buffer_info = &tx->buffer_info[tx->frame_tail];
1417	dma_ptr = skb_frag_dma_map(dev, fragment,
1418				   0, fragment_length,
1419				   DMA_TO_DEVICE);
1420	if (dma_mapping_error(dev, dma_ptr)) {
1421		int desc_index;
1422
1423		/* cleanup all previously setup descriptors */
1424		desc_index = tx->frame_first;
1425		while (desc_index != tx->frame_tail) {
1426			lan743x_tx_release_desc(tx, desc_index, true);
1427			desc_index = lan743x_tx_next_index(tx, desc_index);
1428		}
1429		dma_wmb();
1430		tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1431		tx->frame_first = 0;
1432		tx->frame_data0 = 0;
1433		tx->frame_tail = 0;
1434		return -ENOMEM;
1435	}
1436
1437	tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1438	tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1439	tx_descriptor->data3 = (frame_length << 16) &
1440			       TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1441
1442	buffer_info->skb = NULL;
1443	buffer_info->dma_ptr = dma_ptr;
1444	buffer_info->buffer_length = fragment_length;
1445	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1446	buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1447
1448	tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1449			  TX_DESC_DATA0_DTYPE_DATA_ |
1450			  TX_DESC_DATA0_FCS_;
1451
1452	/* data0 will be programmed in one of other frame assembler functions */
1453	return 0;
1454}
1455
1456static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1457				 struct sk_buff *skb,
1458				 bool ignore_sync)
1459{
1460	/* called only from within lan743x_tx_xmit_frame
1461	 * assuming tx->ring_lock has already been acquired
1462	 */
1463	struct lan743x_tx_descriptor *tx_descriptor = NULL;
1464	struct lan743x_tx_buffer_info *buffer_info = NULL;
1465	struct lan743x_adapter *adapter = tx->adapter;
1466	u32 tx_tail_flags = 0;
1467
1468	/* wrap up previous descriptor */
1469	tx->frame_data0 |= TX_DESC_DATA0_LS_;
1470	tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1471
1472	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1473	buffer_info = &tx->buffer_info[tx->frame_tail];
1474	buffer_info->skb = skb;
1475	if (ignore_sync)
1476		buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1477
1478	tx_descriptor->data0 = tx->frame_data0;
1479	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1480	tx->last_tail = tx->frame_tail;
1481
1482	dma_wmb();
1483
1484	if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1485		tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1486	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1487		tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1488		TX_TAIL_SET_TOP_INT_EN_;
1489
1490	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1491			  tx_tail_flags | tx->frame_tail);
1492	tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1493}
1494
1495static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1496					 struct sk_buff *skb)
1497{
1498	int required_number_of_descriptors = 0;
1499	unsigned int start_frame_length = 0;
1500	unsigned int frame_length = 0;
1501	unsigned int head_length = 0;
1502	unsigned long irq_flags = 0;
1503	bool ignore_sync = false;
1504	int nr_frags = 0;
1505	bool gso = false;
1506	int j;
1507
1508	required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1509
1510	spin_lock_irqsave(&tx->ring_lock, irq_flags);
1511	if (required_number_of_descriptors >
1512		lan743x_tx_get_avail_desc(tx)) {
1513		if (required_number_of_descriptors > (tx->ring_size - 1)) {
1514			dev_kfree_skb(skb);
1515		} else {
1516			/* save to overflow buffer */
1517			tx->overflow_skb = skb;
1518			netif_stop_queue(tx->adapter->netdev);
1519		}
1520		goto unlock;
1521	}
1522
1523	/* space available, transmit skb  */
1524	head_length = skb_headlen(skb);
1525	frame_length = skb_pagelen(skb);
1526	nr_frags = skb_shinfo(skb)->nr_frags;
1527	start_frame_length = frame_length;
1528	gso = skb_is_gso(skb);
1529	if (gso) {
1530		start_frame_length = max(skb_shinfo(skb)->gso_size,
1531					 (unsigned short)8);
1532	}
1533
1534	if (lan743x_tx_frame_start(tx,
1535				   skb->data, head_length,
1536				   start_frame_length,
1537				   skb->ip_summed == CHECKSUM_PARTIAL)) {
1538		dev_kfree_skb(skb);
1539		goto unlock;
1540	}
1541
1542	if (gso)
1543		lan743x_tx_frame_add_lso(tx, frame_length);
1544
1545	if (nr_frags <= 0)
1546		goto finish;
1547
1548	for (j = 0; j < nr_frags; j++) {
1549		const struct skb_frag_struct *frag;
1550
1551		frag = &(skb_shinfo(skb)->frags[j]);
1552		if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1553			/* upon error no need to call
1554			 *	lan743x_tx_frame_end
1555			 * frame assembler clean up was performed inside
1556			 *	lan743x_tx_frame_add_fragment
1557			 */
1558			dev_kfree_skb(skb);
1559			goto unlock;
1560		}
1561	}
1562
1563finish:
1564	lan743x_tx_frame_end(tx, skb, ignore_sync);
1565
1566unlock:
1567	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1568	return NETDEV_TX_OK;
1569}
1570
1571static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1572{
1573	struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1574	struct lan743x_adapter *adapter = tx->adapter;
1575	bool start_transmitter = false;
1576	unsigned long irq_flags = 0;
1577	u32 ioc_bit = 0;
1578	u32 int_sts = 0;
1579
1580	ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1581	int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1582	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1583		lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1584	spin_lock_irqsave(&tx->ring_lock, irq_flags);
1585
1586	/* clean up tx ring */
1587	lan743x_tx_release_completed_descriptors(tx);
1588	if (netif_queue_stopped(adapter->netdev)) {
1589		if (tx->overflow_skb) {
1590			if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1591				lan743x_tx_get_avail_desc(tx))
1592				start_transmitter = true;
1593		} else {
1594			netif_wake_queue(adapter->netdev);
1595		}
1596	}
1597	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1598
1599	if (start_transmitter) {
1600		/* space is now available, transmit overflow skb */
1601		lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1602		tx->overflow_skb = NULL;
1603		netif_wake_queue(adapter->netdev);
1604	}
1605
1606	if (!napi_complete_done(napi, weight))
1607		goto done;
1608
1609	/* enable isr */
1610	lan743x_csr_write(adapter, INT_EN_SET,
1611			  INT_BIT_DMA_TX_(tx->channel_number));
1612	lan743x_csr_read(adapter, INT_STS);
1613
1614done:
1615	return weight;
1616}
1617
1618static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1619{
1620	if (tx->head_cpu_ptr) {
1621		pci_free_consistent(tx->adapter->pdev,
1622				    sizeof(*tx->head_cpu_ptr),
1623				    (void *)(tx->head_cpu_ptr),
1624				    tx->head_dma_ptr);
1625		tx->head_cpu_ptr = NULL;
1626		tx->head_dma_ptr = 0;
1627	}
1628	kfree(tx->buffer_info);
1629	tx->buffer_info = NULL;
1630
1631	if (tx->ring_cpu_ptr) {
1632		pci_free_consistent(tx->adapter->pdev,
1633				    tx->ring_allocation_size,
1634				    tx->ring_cpu_ptr,
1635				    tx->ring_dma_ptr);
1636		tx->ring_allocation_size = 0;
1637		tx->ring_cpu_ptr = NULL;
1638		tx->ring_dma_ptr = 0;
1639	}
1640	tx->ring_size = 0;
1641}
1642
1643static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1644{
1645	size_t ring_allocation_size = 0;
1646	void *cpu_ptr = NULL;
1647	dma_addr_t dma_ptr;
1648	int ret = -ENOMEM;
1649
1650	tx->ring_size = LAN743X_TX_RING_SIZE;
1651	if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1652		ret = -EINVAL;
1653		goto cleanup;
1654	}
1655	ring_allocation_size = ALIGN(tx->ring_size *
1656				     sizeof(struct lan743x_tx_descriptor),
1657				     PAGE_SIZE);
1658	dma_ptr = 0;
1659	cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1660					ring_allocation_size, &dma_ptr);
1661	if (!cpu_ptr) {
1662		ret = -ENOMEM;
1663		goto cleanup;
1664	}
1665
1666	tx->ring_allocation_size = ring_allocation_size;
1667	tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1668	tx->ring_dma_ptr = dma_ptr;
1669
1670	cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1671	if (!cpu_ptr) {
1672		ret = -ENOMEM;
1673		goto cleanup;
1674	}
1675	tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1676	dma_ptr = 0;
1677	cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1678					sizeof(*tx->head_cpu_ptr), &dma_ptr);
1679	if (!cpu_ptr) {
1680		ret = -ENOMEM;
1681		goto cleanup;
1682	}
1683
1684	tx->head_cpu_ptr = cpu_ptr;
1685	tx->head_dma_ptr = dma_ptr;
1686	if (tx->head_dma_ptr & 0x3) {
1687		ret = -ENOMEM;
1688		goto cleanup;
1689	}
1690
1691	return 0;
1692
1693cleanup:
1694	lan743x_tx_ring_cleanup(tx);
1695	return ret;
1696}
1697
1698static void lan743x_tx_close(struct lan743x_tx *tx)
1699{
1700	struct lan743x_adapter *adapter = tx->adapter;
1701
1702	lan743x_csr_write(adapter,
1703			  DMAC_CMD,
1704			  DMAC_CMD_STOP_T_(tx->channel_number));
1705	lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1706
1707	lan743x_csr_write(adapter,
1708			  DMAC_INT_EN_CLR,
1709			  DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1710	lan743x_csr_write(adapter, INT_EN_CLR,
1711			  INT_BIT_DMA_TX_(tx->channel_number));
1712	napi_disable(&tx->napi);
1713	netif_napi_del(&tx->napi);
1714
1715	lan743x_csr_write(adapter, FCT_TX_CTL,
1716			  FCT_TX_CTL_DIS_(tx->channel_number));
1717	lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1718				 FCT_TX_CTL_EN_(tx->channel_number),
1719				 0, 1000, 20000, 100);
1720
1721	lan743x_tx_release_all_descriptors(tx);
1722
1723	if (tx->overflow_skb) {
1724		dev_kfree_skb(tx->overflow_skb);
1725		tx->overflow_skb = NULL;
1726	}
1727
1728	lan743x_tx_ring_cleanup(tx);
1729}
1730
1731static int lan743x_tx_open(struct lan743x_tx *tx)
1732{
1733	struct lan743x_adapter *adapter = NULL;
1734	u32 data = 0;
1735	int ret;
1736
1737	adapter = tx->adapter;
1738	ret = lan743x_tx_ring_init(tx);
1739	if (ret)
1740		return ret;
1741
1742	/* initialize fifo */
1743	lan743x_csr_write(adapter, FCT_TX_CTL,
1744			  FCT_TX_CTL_RESET_(tx->channel_number));
1745	lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1746				 FCT_TX_CTL_RESET_(tx->channel_number),
1747				 0, 1000, 20000, 100);
1748
1749	/* enable fifo */
1750	lan743x_csr_write(adapter, FCT_TX_CTL,
1751			  FCT_TX_CTL_EN_(tx->channel_number));
1752
1753	/* reset tx channel */
1754	lan743x_csr_write(adapter, DMAC_CMD,
1755			  DMAC_CMD_TX_SWR_(tx->channel_number));
1756	lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1757				 DMAC_CMD_TX_SWR_(tx->channel_number),
1758				 0, 1000, 20000, 100);
1759
1760	/* Write TX_BASE_ADDR */
1761	lan743x_csr_write(adapter,
1762			  TX_BASE_ADDRH(tx->channel_number),
1763			  DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1764	lan743x_csr_write(adapter,
1765			  TX_BASE_ADDRL(tx->channel_number),
1766			  DMA_ADDR_LOW32(tx->ring_dma_ptr));
1767
1768	/* Write TX_CFG_B */
1769	data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1770	data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1771	data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1772	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1773		data |= TX_CFG_B_TDMABL_512_;
1774	lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1775
1776	/* Write TX_CFG_A */
1777	data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1778	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1779		data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1780		data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1781		data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1782		data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1783	}
1784	lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1785
1786	/* Write TX_HEAD_WRITEBACK_ADDR */
1787	lan743x_csr_write(adapter,
1788			  TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1789			  DMA_ADDR_HIGH32(tx->head_dma_ptr));
1790	lan743x_csr_write(adapter,
1791			  TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1792			  DMA_ADDR_LOW32(tx->head_dma_ptr));
1793
1794	/* set last head */
1795	tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1796
1797	/* write TX_TAIL */
1798	tx->last_tail = 0;
1799	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1800			  (u32)(tx->last_tail));
1801	tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1802							 INT_BIT_DMA_TX_
1803							 (tx->channel_number));
1804	netif_napi_add(adapter->netdev,
1805		       &tx->napi, lan743x_tx_napi_poll,
1806		       tx->ring_size - 1);
1807	napi_enable(&tx->napi);
1808
1809	data = 0;
1810	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1811		data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1812	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1813		data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1814	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1815		data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1816	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1817		data |= TX_CFG_C_TX_INT_EN_R2C_;
1818	lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1819
1820	if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1821		lan743x_csr_write(adapter, INT_EN_SET,
1822				  INT_BIT_DMA_TX_(tx->channel_number));
1823	lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1824			  DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1825
1826	/*  start dmac channel */
1827	lan743x_csr_write(adapter, DMAC_CMD,
1828			  DMAC_CMD_START_T_(tx->channel_number));
1829	return 0;
1830}
1831
1832static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1833{
1834	return ((++index) % rx->ring_size);
1835}
1836
1837static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1838{
1839	struct lan743x_rx_buffer_info *buffer_info;
1840	struct lan743x_rx_descriptor *descriptor;
1841	int length = 0;
1842
1843	length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1844	descriptor = &rx->ring_cpu_ptr[index];
1845	buffer_info = &rx->buffer_info[index];
1846	buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1847					      length,
1848					      GFP_ATOMIC | GFP_DMA);
1849	if (!(buffer_info->skb))
1850		return -ENOMEM;
1851	buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1852					      buffer_info->skb->data,
1853					      length,
1854					      DMA_FROM_DEVICE);
1855	if (dma_mapping_error(&rx->adapter->pdev->dev,
1856			      buffer_info->dma_ptr)) {
1857		buffer_info->dma_ptr = 0;
1858		return -ENOMEM;
1859	}
1860
1861	buffer_info->buffer_length = length;
1862	descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1863	descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1864	descriptor->data3 = 0;
1865	descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1866			    (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1867	skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1868
1869	return 0;
1870}
1871
1872static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1873{
1874	struct lan743x_rx_buffer_info *buffer_info;
1875	struct lan743x_rx_descriptor *descriptor;
1876
1877	descriptor = &rx->ring_cpu_ptr[index];
1878	buffer_info = &rx->buffer_info[index];
1879
1880	descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1881	descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1882	descriptor->data3 = 0;
1883	descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1884			    ((buffer_info->buffer_length) &
1885			    RX_DESC_DATA0_BUF_LENGTH_MASK_));
1886}
1887
1888static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1889{
1890	struct lan743x_rx_buffer_info *buffer_info;
1891	struct lan743x_rx_descriptor *descriptor;
1892
1893	descriptor = &rx->ring_cpu_ptr[index];
1894	buffer_info = &rx->buffer_info[index];
1895
1896	memset(descriptor, 0, sizeof(*descriptor));
1897
1898	if (buffer_info->dma_ptr) {
1899		dma_unmap_single(&rx->adapter->pdev->dev,
1900				 buffer_info->dma_ptr,
1901				 buffer_info->buffer_length,
1902				 DMA_FROM_DEVICE);
1903		buffer_info->dma_ptr = 0;
1904	}
1905
1906	if (buffer_info->skb) {
1907		dev_kfree_skb(buffer_info->skb);
1908		buffer_info->skb = NULL;
1909	}
1910
1911	memset(buffer_info, 0, sizeof(*buffer_info));
1912}
1913
1914static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1915{
1916	struct skb_shared_hwtstamps *hwtstamps = NULL;
1917	int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1918	struct lan743x_rx_buffer_info *buffer_info;
1919	struct lan743x_rx_descriptor *descriptor;
1920	int current_head_index = -1;
1921	int extension_index = -1;
1922	int first_index = -1;
1923	int last_index = -1;
1924
1925	current_head_index = *rx->head_cpu_ptr;
1926	if (current_head_index < 0 || current_head_index >= rx->ring_size)
1927		goto done;
1928
1929	if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
1930		goto done;
1931
1932	if (rx->last_head != current_head_index) {
1933		descriptor = &rx->ring_cpu_ptr[rx->last_head];
1934		if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1935			goto done;
1936
1937		if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
1938			goto done;
1939
1940		first_index = rx->last_head;
1941		if (descriptor->data0 & RX_DESC_DATA0_LS_) {
1942			last_index = rx->last_head;
1943		} else {
1944			int index;
1945
1946			index = lan743x_rx_next_index(rx, first_index);
1947			while (index != current_head_index) {
1948				descriptor = &rx->ring_cpu_ptr[index];
1949				if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1950					goto done;
1951
1952				if (descriptor->data0 & RX_DESC_DATA0_LS_) {
1953					last_index = index;
1954					break;
1955				}
1956				index = lan743x_rx_next_index(rx, index);
1957			}
1958		}
1959		if (last_index >= 0) {
1960			descriptor = &rx->ring_cpu_ptr[last_index];
1961			if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
1962				/* extension is expected to follow */
1963				int index = lan743x_rx_next_index(rx,
1964								  last_index);
1965				if (index != current_head_index) {
1966					descriptor = &rx->ring_cpu_ptr[index];
1967					if (descriptor->data0 &
1968					    RX_DESC_DATA0_OWN_) {
1969						goto done;
1970					}
1971					if (descriptor->data0 &
1972					    RX_DESC_DATA0_EXT_) {
1973						extension_index = index;
1974					} else {
1975						goto done;
1976					}
1977				} else {
1978					/* extension is not yet available */
1979					/* prevent processing of this packet */
1980					first_index = -1;
1981					last_index = -1;
1982				}
1983			}
1984		}
1985	}
1986	if (first_index >= 0 && last_index >= 0) {
1987		int real_last_index = last_index;
1988		struct sk_buff *skb = NULL;
1989		u32 ts_sec = 0;
1990		u32 ts_nsec = 0;
1991
1992		/* packet is available */
1993		if (first_index == last_index) {
1994			/* single buffer packet */
1995			int packet_length;
1996
1997			buffer_info = &rx->buffer_info[first_index];
1998			skb = buffer_info->skb;
1999			descriptor = &rx->ring_cpu_ptr[first_index];
2000
2001			/* unmap from dma */
2002			if (buffer_info->dma_ptr) {
2003				dma_unmap_single(&rx->adapter->pdev->dev,
2004						 buffer_info->dma_ptr,
2005						 buffer_info->buffer_length,
2006						 DMA_FROM_DEVICE);
2007				buffer_info->dma_ptr = 0;
2008				buffer_info->buffer_length = 0;
2009			}
2010			buffer_info->skb = NULL;
2011			packet_length =	RX_DESC_DATA0_FRAME_LENGTH_GET_
2012					(descriptor->data0);
2013			skb_put(skb, packet_length - 4);
2014			skb->protocol = eth_type_trans(skb,
2015						       rx->adapter->netdev);
2016			lan743x_rx_allocate_ring_element(rx, first_index);
2017		} else {
2018			int index = first_index;
2019
2020			/* multi buffer packet not supported */
2021			/* this should not happen since
2022			 * buffers are allocated to be at least jumbo size
2023			 */
2024
2025			/* clean up buffers */
2026			if (first_index <= last_index) {
2027				while ((index >= first_index) &&
2028				       (index <= last_index)) {
2029					lan743x_rx_release_ring_element(rx,
2030									index);
2031					lan743x_rx_allocate_ring_element(rx,
2032									 index);
2033					index = lan743x_rx_next_index(rx,
2034								      index);
2035				}
2036			} else {
2037				while ((index >= first_index) ||
2038				       (index <= last_index)) {
2039					lan743x_rx_release_ring_element(rx,
2040									index);
2041					lan743x_rx_allocate_ring_element(rx,
2042									 index);
2043					index = lan743x_rx_next_index(rx,
2044								      index);
2045				}
2046			}
2047		}
2048
2049		if (extension_index >= 0) {
2050			descriptor = &rx->ring_cpu_ptr[extension_index];
2051			buffer_info = &rx->buffer_info[extension_index];
2052
2053			ts_sec = descriptor->data1;
2054			ts_nsec = (descriptor->data2 &
2055				  RX_DESC_DATA2_TS_NS_MASK_);
2056			lan743x_rx_reuse_ring_element(rx, extension_index);
2057			real_last_index = extension_index;
2058		}
2059
2060		if (!skb) {
2061			result = RX_PROCESS_RESULT_PACKET_DROPPED;
2062			goto move_forward;
2063		}
2064
2065		if (extension_index < 0)
2066			goto pass_packet_to_os;
2067		hwtstamps = skb_hwtstamps(skb);
2068		if (hwtstamps)
2069			hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2070
2071pass_packet_to_os:
2072		/* pass packet to OS */
2073		napi_gro_receive(&rx->napi, skb);
2074		result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2075
2076move_forward:
2077		/* push tail and head forward */
2078		rx->last_tail = real_last_index;
2079		rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2080	}
2081done:
2082	return result;
2083}
2084
2085static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2086{
2087	struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2088	struct lan743x_adapter *adapter = rx->adapter;
2089	u32 rx_tail_flags = 0;
2090	int count;
2091
2092	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2093		/* clear int status bit before reading packet */
2094		lan743x_csr_write(adapter, DMAC_INT_STS,
2095				  DMAC_INT_BIT_RXFRM_(rx->channel_number));
2096	}
2097	count = 0;
2098	while (count < weight) {
2099		int rx_process_result = -1;
2100
2101		rx_process_result = lan743x_rx_process_packet(rx);
2102		if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2103			count++;
2104		} else if (rx_process_result ==
2105			RX_PROCESS_RESULT_NOTHING_TO_DO) {
2106			break;
2107		} else if (rx_process_result ==
2108			RX_PROCESS_RESULT_PACKET_DROPPED) {
2109			continue;
2110		}
2111	}
2112	rx->frame_count += count;
2113	if (count == weight)
2114		goto done;
2115
2116	if (!napi_complete_done(napi, count))
2117		goto done;
2118
2119	if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2120		rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2121	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2122		rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2123	} else {
2124		lan743x_csr_write(adapter, INT_EN_SET,
2125				  INT_BIT_DMA_RX_(rx->channel_number));
2126	}
2127
2128	/* update RX_TAIL */
2129	lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2130			  rx_tail_flags | rx->last_tail);
2131done:
2132	return count;
2133}
2134
2135static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2136{
2137	if (rx->buffer_info && rx->ring_cpu_ptr) {
2138		int index;
2139
2140		for (index = 0; index < rx->ring_size; index++)
2141			lan743x_rx_release_ring_element(rx, index);
2142	}
2143
2144	if (rx->head_cpu_ptr) {
2145		pci_free_consistent(rx->adapter->pdev,
2146				    sizeof(*rx->head_cpu_ptr),
2147				    rx->head_cpu_ptr,
2148				    rx->head_dma_ptr);
2149		rx->head_cpu_ptr = NULL;
2150		rx->head_dma_ptr = 0;
2151	}
2152
2153	kfree(rx->buffer_info);
2154	rx->buffer_info = NULL;
2155
2156	if (rx->ring_cpu_ptr) {
2157		pci_free_consistent(rx->adapter->pdev,
2158				    rx->ring_allocation_size,
2159				    rx->ring_cpu_ptr,
2160				    rx->ring_dma_ptr);
2161		rx->ring_allocation_size = 0;
2162		rx->ring_cpu_ptr = NULL;
2163		rx->ring_dma_ptr = 0;
2164	}
2165
2166	rx->ring_size = 0;
2167	rx->last_head = 0;
2168}
2169
2170static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2171{
2172	size_t ring_allocation_size = 0;
2173	dma_addr_t dma_ptr = 0;
2174	void *cpu_ptr = NULL;
2175	int ret = -ENOMEM;
2176	int index = 0;
2177
2178	rx->ring_size = LAN743X_RX_RING_SIZE;
2179	if (rx->ring_size <= 1) {
2180		ret = -EINVAL;
2181		goto cleanup;
2182	}
2183	if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2184		ret = -EINVAL;
2185		goto cleanup;
2186	}
2187	ring_allocation_size = ALIGN(rx->ring_size *
2188				     sizeof(struct lan743x_rx_descriptor),
2189				     PAGE_SIZE);
2190	dma_ptr = 0;
2191	cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2192					ring_allocation_size, &dma_ptr);
2193	if (!cpu_ptr) {
2194		ret = -ENOMEM;
2195		goto cleanup;
2196	}
2197	rx->ring_allocation_size = ring_allocation_size;
2198	rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2199	rx->ring_dma_ptr = dma_ptr;
2200
2201	cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2202			  GFP_KERNEL);
2203	if (!cpu_ptr) {
2204		ret = -ENOMEM;
2205		goto cleanup;
2206	}
2207	rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2208	dma_ptr = 0;
2209	cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2210					sizeof(*rx->head_cpu_ptr), &dma_ptr);
2211	if (!cpu_ptr) {
2212		ret = -ENOMEM;
2213		goto cleanup;
2214	}
2215
2216	rx->head_cpu_ptr = cpu_ptr;
2217	rx->head_dma_ptr = dma_ptr;
2218	if (rx->head_dma_ptr & 0x3) {
2219		ret = -ENOMEM;
2220		goto cleanup;
2221	}
2222
2223	rx->last_head = 0;
2224	for (index = 0; index < rx->ring_size; index++) {
2225		ret = lan743x_rx_allocate_ring_element(rx, index);
2226		if (ret)
2227			goto cleanup;
2228	}
2229	return 0;
2230
2231cleanup:
2232	lan743x_rx_ring_cleanup(rx);
2233	return ret;
2234}
2235
2236static void lan743x_rx_close(struct lan743x_rx *rx)
2237{
2238	struct lan743x_adapter *adapter = rx->adapter;
2239
2240	lan743x_csr_write(adapter, FCT_RX_CTL,
2241			  FCT_RX_CTL_DIS_(rx->channel_number));
2242	lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2243				 FCT_RX_CTL_EN_(rx->channel_number),
2244				 0, 1000, 20000, 100);
2245
2246	lan743x_csr_write(adapter, DMAC_CMD,
2247			  DMAC_CMD_STOP_R_(rx->channel_number));
2248	lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2249
2250	lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2251			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
2252	lan743x_csr_write(adapter, INT_EN_CLR,
2253			  INT_BIT_DMA_RX_(rx->channel_number));
2254	napi_disable(&rx->napi);
2255
2256	netif_napi_del(&rx->napi);
2257
2258	lan743x_rx_ring_cleanup(rx);
2259}
2260
2261static int lan743x_rx_open(struct lan743x_rx *rx)
2262{
2263	struct lan743x_adapter *adapter = rx->adapter;
2264	u32 data = 0;
2265	int ret;
2266
2267	rx->frame_count = 0;
2268	ret = lan743x_rx_ring_init(rx);
2269	if (ret)
2270		goto return_error;
2271
2272	netif_napi_add(adapter->netdev,
2273		       &rx->napi, lan743x_rx_napi_poll,
2274		       rx->ring_size - 1);
2275
2276	lan743x_csr_write(adapter, DMAC_CMD,
2277			  DMAC_CMD_RX_SWR_(rx->channel_number));
2278	lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2279				 DMAC_CMD_RX_SWR_(rx->channel_number),
2280				 0, 1000, 20000, 100);
2281
2282	/* set ring base address */
2283	lan743x_csr_write(adapter,
2284			  RX_BASE_ADDRH(rx->channel_number),
2285			  DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2286	lan743x_csr_write(adapter,
2287			  RX_BASE_ADDRL(rx->channel_number),
2288			  DMA_ADDR_LOW32(rx->ring_dma_ptr));
2289
2290	/* set rx write back address */
2291	lan743x_csr_write(adapter,
2292			  RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2293			  DMA_ADDR_HIGH32(rx->head_dma_ptr));
2294	lan743x_csr_write(adapter,
2295			  RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2296			  DMA_ADDR_LOW32(rx->head_dma_ptr));
2297	data = RX_CFG_A_RX_HP_WB_EN_;
2298	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2299		data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2300			RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2301			RX_CFG_A_RX_PF_THRES_SET_(16) |
2302			RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2303	}
2304
2305	/* set RX_CFG_A */
2306	lan743x_csr_write(adapter,
2307			  RX_CFG_A(rx->channel_number), data);
2308
2309	/* set RX_CFG_B */
2310	data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2311	data &= ~RX_CFG_B_RX_PAD_MASK_;
2312	if (!RX_HEAD_PADDING)
2313		data |= RX_CFG_B_RX_PAD_0_;
2314	else
2315		data |= RX_CFG_B_RX_PAD_2_;
2316	data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2317	data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2318	data |= RX_CFG_B_TS_ALL_RX_;
2319	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2320		data |= RX_CFG_B_RDMABL_512_;
2321
2322	lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2323	rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2324							 INT_BIT_DMA_RX_
2325							 (rx->channel_number));
2326
2327	/* set RX_CFG_C */
2328	data = 0;
2329	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2330		data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2331	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2332		data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2333	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2334		data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2335	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2336		data |= RX_CFG_C_RX_INT_EN_R2C_;
2337	lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2338
2339	rx->last_tail = ((u32)(rx->ring_size - 1));
2340	lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2341			  rx->last_tail);
2342	rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2343	if (rx->last_head) {
2344		ret = -EIO;
2345		goto napi_delete;
2346	}
2347
2348	napi_enable(&rx->napi);
2349
2350	lan743x_csr_write(adapter, INT_EN_SET,
2351			  INT_BIT_DMA_RX_(rx->channel_number));
2352	lan743x_csr_write(adapter, DMAC_INT_STS,
2353			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
2354	lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2355			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
2356	lan743x_csr_write(adapter, DMAC_CMD,
2357			  DMAC_CMD_START_R_(rx->channel_number));
2358
2359	/* initialize fifo */
2360	lan743x_csr_write(adapter, FCT_RX_CTL,
2361			  FCT_RX_CTL_RESET_(rx->channel_number));
2362	lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2363				 FCT_RX_CTL_RESET_(rx->channel_number),
2364				 0, 1000, 20000, 100);
2365	lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2366			  FCT_FLOW_CTL_REQ_EN_ |
2367			  FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2368			  FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2369
2370	/* enable fifo */
2371	lan743x_csr_write(adapter, FCT_RX_CTL,
2372			  FCT_RX_CTL_EN_(rx->channel_number));
2373	return 0;
2374
2375napi_delete:
2376	netif_napi_del(&rx->napi);
2377	lan743x_rx_ring_cleanup(rx);
2378
2379return_error:
2380	return ret;
2381}
2382
2383static int lan743x_netdev_close(struct net_device *netdev)
2384{
2385	struct lan743x_adapter *adapter = netdev_priv(netdev);
2386	int index;
2387
2388	lan743x_tx_close(&adapter->tx[0]);
2389
2390	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2391		lan743x_rx_close(&adapter->rx[index]);
2392
2393	lan743x_phy_close(adapter);
2394
2395	lan743x_mac_close(adapter);
2396
2397	lan743x_intr_close(adapter);
2398
2399	return 0;
2400}
2401
2402static int lan743x_netdev_open(struct net_device *netdev)
2403{
2404	struct lan743x_adapter *adapter = netdev_priv(netdev);
2405	int index;
2406	int ret;
2407
2408	ret = lan743x_intr_open(adapter);
2409	if (ret)
2410		goto return_error;
2411
2412	ret = lan743x_mac_open(adapter);
2413	if (ret)
2414		goto close_intr;
2415
2416	ret = lan743x_phy_open(adapter);
2417	if (ret)
2418		goto close_mac;
2419
2420	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2421		ret = lan743x_rx_open(&adapter->rx[index]);
2422		if (ret)
2423			goto close_rx;
2424	}
2425
2426	ret = lan743x_tx_open(&adapter->tx[0]);
2427	if (ret)
2428		goto close_rx;
2429
2430	return 0;
2431
2432close_rx:
2433	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2434		if (adapter->rx[index].ring_cpu_ptr)
2435			lan743x_rx_close(&adapter->rx[index]);
2436	}
2437	lan743x_phy_close(adapter);
2438
2439close_mac:
2440	lan743x_mac_close(adapter);
2441
2442close_intr:
2443	lan743x_intr_close(adapter);
2444
2445return_error:
2446	netif_warn(adapter, ifup, adapter->netdev,
2447		   "Error opening LAN743x\n");
2448	return ret;
2449}
2450
2451static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2452					     struct net_device *netdev)
2453{
2454	struct lan743x_adapter *adapter = netdev_priv(netdev);
2455
2456	return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2457}
2458
2459static int lan743x_netdev_ioctl(struct net_device *netdev,
2460				struct ifreq *ifr, int cmd)
2461{
2462	if (!netif_running(netdev))
2463		return -EINVAL;
2464	return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2465}
2466
2467static void lan743x_netdev_set_multicast(struct net_device *netdev)
2468{
2469	struct lan743x_adapter *adapter = netdev_priv(netdev);
2470
2471	lan743x_rfe_set_multicast(adapter);
2472}
2473
2474static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2475{
2476	struct lan743x_adapter *adapter = netdev_priv(netdev);
2477	int ret = 0;
2478
2479	ret = lan743x_mac_set_mtu(adapter, new_mtu);
2480	if (!ret)
2481		netdev->mtu = new_mtu;
2482	return ret;
2483}
2484
2485static void lan743x_netdev_get_stats64(struct net_device *netdev,
2486				       struct rtnl_link_stats64 *stats)
2487{
2488	struct lan743x_adapter *adapter = netdev_priv(netdev);
2489
2490	stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2491	stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2492	stats->rx_bytes = lan743x_csr_read(adapter,
2493					   STAT_RX_UNICAST_BYTE_COUNT) +
2494			  lan743x_csr_read(adapter,
2495					   STAT_RX_BROADCAST_BYTE_COUNT) +
2496			  lan743x_csr_read(adapter,
2497					   STAT_RX_MULTICAST_BYTE_COUNT);
2498	stats->tx_bytes = lan743x_csr_read(adapter,
2499					   STAT_TX_UNICAST_BYTE_COUNT) +
2500			  lan743x_csr_read(adapter,
2501					   STAT_TX_BROADCAST_BYTE_COUNT) +
2502			  lan743x_csr_read(adapter,
2503					   STAT_TX_MULTICAST_BYTE_COUNT);
2504	stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2505			   lan743x_csr_read(adapter,
2506					    STAT_RX_ALIGNMENT_ERRORS) +
2507			   lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2508			   lan743x_csr_read(adapter,
2509					    STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2510			   lan743x_csr_read(adapter,
2511					    STAT_RX_OVERSIZE_FRAME_ERRORS);
2512	stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2513			   lan743x_csr_read(adapter,
2514					    STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2515			   lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2516	stats->rx_dropped = lan743x_csr_read(adapter,
2517					     STAT_RX_DROPPED_FRAMES);
2518	stats->tx_dropped = lan743x_csr_read(adapter,
2519					     STAT_TX_EXCESSIVE_COLLISION);
2520	stats->multicast = lan743x_csr_read(adapter,
2521					    STAT_RX_MULTICAST_FRAMES) +
2522			   lan743x_csr_read(adapter,
2523					    STAT_TX_MULTICAST_FRAMES);
2524	stats->collisions = lan743x_csr_read(adapter,
2525					     STAT_TX_SINGLE_COLLISIONS) +
2526			    lan743x_csr_read(adapter,
2527					     STAT_TX_MULTIPLE_COLLISIONS) +
2528			    lan743x_csr_read(adapter,
2529					     STAT_TX_LATE_COLLISIONS);
2530}
2531
2532static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2533					  void *addr)
2534{
2535	struct lan743x_adapter *adapter = netdev_priv(netdev);
2536	struct sockaddr *sock_addr = addr;
2537	int ret;
2538
2539	ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2540	if (ret)
2541		return ret;
2542	ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2543	lan743x_mac_set_address(adapter, sock_addr->sa_data);
2544	lan743x_rfe_update_mac_address(adapter);
2545	return 0;
2546}
2547
2548static const struct net_device_ops lan743x_netdev_ops = {
2549	.ndo_open		= lan743x_netdev_open,
2550	.ndo_stop		= lan743x_netdev_close,
2551	.ndo_start_xmit		= lan743x_netdev_xmit_frame,
2552	.ndo_do_ioctl		= lan743x_netdev_ioctl,
2553	.ndo_set_rx_mode	= lan743x_netdev_set_multicast,
2554	.ndo_change_mtu		= lan743x_netdev_change_mtu,
2555	.ndo_get_stats64	= lan743x_netdev_get_stats64,
2556	.ndo_set_mac_address	= lan743x_netdev_set_mac_address,
2557};
2558
2559static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2560{
2561	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2562}
2563
2564static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2565{
2566	mdiobus_unregister(adapter->mdiobus);
2567}
2568
2569static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2570{
2571	unregister_netdev(adapter->netdev);
2572
2573	lan743x_mdiobus_cleanup(adapter);
2574	lan743x_hardware_cleanup(adapter);
2575	lan743x_pci_cleanup(adapter);
2576}
2577
2578static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2579				 struct pci_dev *pdev)
2580{
2581	struct lan743x_tx *tx;
2582	int index;
2583	int ret;
2584
2585	adapter->intr.irq = adapter->pdev->irq;
2586	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2587	mutex_init(&adapter->dp_lock);
2588	ret = lan743x_mac_init(adapter);
2589	if (ret)
2590		return ret;
2591
2592	ret = lan743x_phy_init(adapter);
2593	if (ret)
2594		return ret;
2595
2596	lan743x_rfe_update_mac_address(adapter);
2597
2598	ret = lan743x_dmac_init(adapter);
2599	if (ret)
2600		return ret;
2601
2602	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2603		adapter->rx[index].adapter = adapter;
2604		adapter->rx[index].channel_number = index;
2605	}
2606
2607	tx = &adapter->tx[0];
2608	tx->adapter = adapter;
2609	tx->channel_number = 0;
2610	spin_lock_init(&tx->ring_lock);
2611	return 0;
2612}
2613
2614static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2615{
2616	int ret;
2617
2618	adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2619	if (!(adapter->mdiobus)) {
2620		ret = -ENOMEM;
2621		goto return_error;
2622	}
2623
2624	adapter->mdiobus->priv = (void *)adapter;
2625	adapter->mdiobus->read = lan743x_mdiobus_read;
2626	adapter->mdiobus->write = lan743x_mdiobus_write;
2627	adapter->mdiobus->name = "lan743x-mdiobus";
2628	snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2629		 "pci-%s", pci_name(adapter->pdev));
2630
2631	/* set to internal PHY id */
2632	adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2633
2634	/* register mdiobus */
2635	ret = mdiobus_register(adapter->mdiobus);
2636	if (ret < 0)
2637		goto return_error;
2638	return 0;
2639
2640return_error:
2641	return ret;
2642}
2643
2644/* lan743x_pcidev_probe - Device Initialization Routine
2645 * @pdev: PCI device information struct
2646 * @id: entry in lan743x_pci_tbl
2647 *
2648 * Returns 0 on success, negative on failure
2649 *
2650 * initializes an adapter identified by a pci_dev structure.
2651 * The OS initialization, configuring of the adapter private structure,
2652 * and a hardware reset occur.
2653 **/
2654static int lan743x_pcidev_probe(struct pci_dev *pdev,
2655				const struct pci_device_id *id)
2656{
2657	struct lan743x_adapter *adapter = NULL;
2658	struct net_device *netdev = NULL;
2659	int ret = -ENODEV;
2660
2661	netdev = devm_alloc_etherdev(&pdev->dev,
2662				     sizeof(struct lan743x_adapter));
2663	if (!netdev)
2664		goto return_error;
2665
2666	SET_NETDEV_DEV(netdev, &pdev->dev);
2667	pci_set_drvdata(pdev, netdev);
2668	adapter = netdev_priv(netdev);
2669	adapter->netdev = netdev;
2670	adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2671			      NETIF_MSG_LINK | NETIF_MSG_IFUP |
2672			      NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2673	netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2674
2675	ret = lan743x_pci_init(adapter, pdev);
2676	if (ret)
2677		goto return_error;
2678
2679	ret = lan743x_csr_init(adapter);
2680	if (ret)
2681		goto cleanup_pci;
2682
2683	ret = lan743x_hardware_init(adapter, pdev);
2684	if (ret)
2685		goto cleanup_pci;
2686
2687	ret = lan743x_mdiobus_init(adapter);
2688	if (ret)
2689		goto cleanup_hardware;
2690
2691	adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2692	adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2693	adapter->netdev->hw_features = adapter->netdev->features;
2694
2695	/* carrier off reporting is important to ethtool even BEFORE open */
2696	netif_carrier_off(netdev);
2697
2698	ret = register_netdev(adapter->netdev);
2699	if (ret < 0)
2700		goto cleanup_mdiobus;
2701	return 0;
2702
2703cleanup_mdiobus:
2704	lan743x_mdiobus_cleanup(adapter);
2705
2706cleanup_hardware:
2707	lan743x_hardware_cleanup(adapter);
2708
2709cleanup_pci:
2710	lan743x_pci_cleanup(adapter);
2711
2712return_error:
2713	pr_warn("Initialization failed\n");
2714	return ret;
2715}
2716
2717/**
2718 * lan743x_pcidev_remove - Device Removal Routine
2719 * @pdev: PCI device information struct
2720 *
2721 * this is called by the PCI subsystem to alert the driver
2722 * that it should release a PCI device.  This could be caused by a
2723 * Hot-Plug event, or because the driver is going to be removed from
2724 * memory.
2725 **/
2726static void lan743x_pcidev_remove(struct pci_dev *pdev)
2727{
2728	struct net_device *netdev = pci_get_drvdata(pdev);
2729	struct lan743x_adapter *adapter = netdev_priv(netdev);
2730
2731	lan743x_full_cleanup(adapter);
2732}
2733
2734static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2735{
2736	struct net_device *netdev = pci_get_drvdata(pdev);
2737	struct lan743x_adapter *adapter = netdev_priv(netdev);
2738
2739	rtnl_lock();
2740	netif_device_detach(netdev);
2741
2742	/* close netdev when netdev is at running state.
2743	 * For instance, it is true when system goes to sleep by pm-suspend
2744	 * However, it is false when system goes to sleep by suspend GUI menu
2745	 */
2746	if (netif_running(netdev))
2747		lan743x_netdev_close(netdev);
2748	rtnl_unlock();
2749
2750	/* clean up lan743x portion */
2751	lan743x_hardware_cleanup(adapter);
2752}
2753
2754static const struct pci_device_id lan743x_pcidev_tbl[] = {
2755	{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
2756	{ 0, }
2757};
2758
2759static struct pci_driver lan743x_pcidev_driver = {
2760	.name     = DRIVER_NAME,
2761	.id_table = lan743x_pcidev_tbl,
2762	.probe    = lan743x_pcidev_probe,
2763	.remove   = lan743x_pcidev_remove,
2764	.shutdown = lan743x_pcidev_shutdown,
2765};
2766
2767module_pci_driver(lan743x_pcidev_driver);
2768
2769MODULE_AUTHOR(DRIVER_AUTHOR);
2770MODULE_DESCRIPTION(DRIVER_DESC);
2771MODULE_LICENSE("GPL");