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lan743x_main.c (84931B)


      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 <linux/crc16.h>
     15 #include "lan743x_main.h"
     16 #include "lan743x_ethtool.h"
     17 
     18 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
     19 {
     20 	pci_release_selected_regions(adapter->pdev,
     21 				     pci_select_bars(adapter->pdev,
     22 						     IORESOURCE_MEM));
     23 	pci_disable_device(adapter->pdev);
     24 }
     25 
     26 static int lan743x_pci_init(struct lan743x_adapter *adapter,
     27 			    struct pci_dev *pdev)
     28 {
     29 	unsigned long bars = 0;
     30 	int ret;
     31 
     32 	adapter->pdev = pdev;
     33 	ret = pci_enable_device_mem(pdev);
     34 	if (ret)
     35 		goto return_error;
     36 
     37 	netif_info(adapter, probe, adapter->netdev,
     38 		   "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
     39 		   pdev->vendor, pdev->device);
     40 	bars = pci_select_bars(pdev, IORESOURCE_MEM);
     41 	if (!test_bit(0, &bars))
     42 		goto disable_device;
     43 
     44 	ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
     45 	if (ret)
     46 		goto disable_device;
     47 
     48 	pci_set_master(pdev);
     49 	return 0;
     50 
     51 disable_device:
     52 	pci_disable_device(adapter->pdev);
     53 
     54 return_error:
     55 	return ret;
     56 }
     57 
     58 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
     59 {
     60 	return ioread32(&adapter->csr.csr_address[offset]);
     61 }
     62 
     63 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
     64 		       u32 data)
     65 {
     66 	iowrite32(data, &adapter->csr.csr_address[offset]);
     67 }
     68 
     69 #define LAN743X_CSR_READ_OP(offset)	lan743x_csr_read(adapter, offset)
     70 
     71 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
     72 {
     73 	u32 data;
     74 
     75 	data = lan743x_csr_read(adapter, HW_CFG);
     76 	data |= HW_CFG_LRST_;
     77 	lan743x_csr_write(adapter, HW_CFG, data);
     78 
     79 	return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
     80 				  !(data & HW_CFG_LRST_), 100000, 10000000);
     81 }
     82 
     83 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
     84 				    int offset, u32 bit_mask,
     85 				    int target_value, int usleep_min,
     86 				    int usleep_max, int count)
     87 {
     88 	u32 data;
     89 
     90 	return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
     91 				  target_value == ((data & bit_mask) ? 1 : 0),
     92 				  usleep_max, usleep_min * count);
     93 }
     94 
     95 static int lan743x_csr_init(struct lan743x_adapter *adapter)
     96 {
     97 	struct lan743x_csr *csr = &adapter->csr;
     98 	resource_size_t bar_start, bar_length;
     99 	int result;
    100 
    101 	bar_start = pci_resource_start(adapter->pdev, 0);
    102 	bar_length = pci_resource_len(adapter->pdev, 0);
    103 	csr->csr_address = devm_ioremap(&adapter->pdev->dev,
    104 					bar_start, bar_length);
    105 	if (!csr->csr_address) {
    106 		result = -ENOMEM;
    107 		goto clean_up;
    108 	}
    109 
    110 	csr->id_rev = lan743x_csr_read(adapter, ID_REV);
    111 	csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
    112 	netif_info(adapter, probe, adapter->netdev,
    113 		   "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
    114 		   csr->id_rev,	FPGA_REV_GET_MAJOR_(csr->fpga_rev),
    115 		   FPGA_REV_GET_MINOR_(csr->fpga_rev));
    116 	if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
    117 		result = -ENODEV;
    118 		goto clean_up;
    119 	}
    120 
    121 	csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
    122 	switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
    123 	case ID_REV_CHIP_REV_A0_:
    124 		csr->flags |= LAN743X_CSR_FLAG_IS_A0;
    125 		csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
    126 		break;
    127 	case ID_REV_CHIP_REV_B0_:
    128 		csr->flags |= LAN743X_CSR_FLAG_IS_B0;
    129 		break;
    130 	}
    131 
    132 	result = lan743x_csr_light_reset(adapter);
    133 	if (result)
    134 		goto clean_up;
    135 	return 0;
    136 clean_up:
    137 	return result;
    138 }
    139 
    140 static void lan743x_intr_software_isr(void *context)
    141 {
    142 	struct lan743x_adapter *adapter = context;
    143 	struct lan743x_intr *intr = &adapter->intr;
    144 	u32 int_sts;
    145 
    146 	int_sts = lan743x_csr_read(adapter, INT_STS);
    147 	if (int_sts & INT_BIT_SW_GP_) {
    148 		lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
    149 		intr->software_isr_flag = 1;
    150 	}
    151 }
    152 
    153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
    154 {
    155 	struct lan743x_tx *tx = context;
    156 	struct lan743x_adapter *adapter = tx->adapter;
    157 	bool enable_flag = true;
    158 	u32 int_en = 0;
    159 
    160 	int_en = lan743x_csr_read(adapter, INT_EN_SET);
    161 	if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
    162 		lan743x_csr_write(adapter, INT_EN_CLR,
    163 				  INT_BIT_DMA_TX_(tx->channel_number));
    164 	}
    165 
    166 	if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
    167 		u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
    168 		u32 dmac_int_sts;
    169 		u32 dmac_int_en;
    170 
    171 		if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
    172 			dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
    173 		else
    174 			dmac_int_sts = ioc_bit;
    175 		if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
    176 			dmac_int_en = lan743x_csr_read(adapter,
    177 						       DMAC_INT_EN_SET);
    178 		else
    179 			dmac_int_en = ioc_bit;
    180 
    181 		dmac_int_en &= ioc_bit;
    182 		dmac_int_sts &= dmac_int_en;
    183 		if (dmac_int_sts & ioc_bit) {
    184 			napi_schedule(&tx->napi);
    185 			enable_flag = false;/* poll func will enable later */
    186 		}
    187 	}
    188 
    189 	if (enable_flag)
    190 		/* enable isr */
    191 		lan743x_csr_write(adapter, INT_EN_SET,
    192 				  INT_BIT_DMA_TX_(tx->channel_number));
    193 }
    194 
    195 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
    196 {
    197 	struct lan743x_rx *rx = context;
    198 	struct lan743x_adapter *adapter = rx->adapter;
    199 	bool enable_flag = true;
    200 
    201 	if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
    202 		lan743x_csr_write(adapter, INT_EN_CLR,
    203 				  INT_BIT_DMA_RX_(rx->channel_number));
    204 	}
    205 
    206 	if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
    207 		u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
    208 		u32 dmac_int_sts;
    209 		u32 dmac_int_en;
    210 
    211 		if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
    212 			dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
    213 		else
    214 			dmac_int_sts = rx_frame_bit;
    215 		if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
    216 			dmac_int_en = lan743x_csr_read(adapter,
    217 						       DMAC_INT_EN_SET);
    218 		else
    219 			dmac_int_en = rx_frame_bit;
    220 
    221 		dmac_int_en &= rx_frame_bit;
    222 		dmac_int_sts &= dmac_int_en;
    223 		if (dmac_int_sts & rx_frame_bit) {
    224 			napi_schedule(&rx->napi);
    225 			enable_flag = false;/* poll funct will enable later */
    226 		}
    227 	}
    228 
    229 	if (enable_flag) {
    230 		/* enable isr */
    231 		lan743x_csr_write(adapter, INT_EN_SET,
    232 				  INT_BIT_DMA_RX_(rx->channel_number));
    233 	}
    234 }
    235 
    236 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
    237 {
    238 	struct lan743x_adapter *adapter = context;
    239 	unsigned int channel;
    240 
    241 	if (int_sts & INT_BIT_ALL_RX_) {
    242 		for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
    243 			channel++) {
    244 			u32 int_bit = INT_BIT_DMA_RX_(channel);
    245 
    246 			if (int_sts & int_bit) {
    247 				lan743x_rx_isr(&adapter->rx[channel],
    248 					       int_bit, flags);
    249 				int_sts &= ~int_bit;
    250 			}
    251 		}
    252 	}
    253 	if (int_sts & INT_BIT_ALL_TX_) {
    254 		for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
    255 			channel++) {
    256 			u32 int_bit = INT_BIT_DMA_TX_(channel);
    257 
    258 			if (int_sts & int_bit) {
    259 				lan743x_tx_isr(&adapter->tx[channel],
    260 					       int_bit, flags);
    261 				int_sts &= ~int_bit;
    262 			}
    263 		}
    264 	}
    265 	if (int_sts & INT_BIT_ALL_OTHER_) {
    266 		if (int_sts & INT_BIT_SW_GP_) {
    267 			lan743x_intr_software_isr(adapter);
    268 			int_sts &= ~INT_BIT_SW_GP_;
    269 		}
    270 		if (int_sts & INT_BIT_1588_) {
    271 			lan743x_ptp_isr(adapter);
    272 			int_sts &= ~INT_BIT_1588_;
    273 		}
    274 	}
    275 	if (int_sts)
    276 		lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
    277 }
    278 
    279 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
    280 {
    281 	struct lan743x_vector *vector = ptr;
    282 	struct lan743x_adapter *adapter = vector->adapter;
    283 	irqreturn_t result = IRQ_NONE;
    284 	u32 int_enables;
    285 	u32 int_sts;
    286 
    287 	if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
    288 		int_sts = lan743x_csr_read(adapter, INT_STS);
    289 	} else if (vector->flags &
    290 		   (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
    291 		   LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
    292 		int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
    293 	} else {
    294 		/* use mask as implied status */
    295 		int_sts = vector->int_mask | INT_BIT_MAS_;
    296 	}
    297 
    298 	if (!(int_sts & INT_BIT_MAS_))
    299 		goto irq_done;
    300 
    301 	if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
    302 		/* disable vector interrupt */
    303 		lan743x_csr_write(adapter,
    304 				  INT_VEC_EN_CLR,
    305 				  INT_VEC_EN_(vector->vector_index));
    306 
    307 	if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
    308 		/* disable master interrupt */
    309 		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
    310 
    311 	if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
    312 		int_enables = lan743x_csr_read(adapter, INT_EN_SET);
    313 	} else {
    314 		/*  use vector mask as implied enable mask */
    315 		int_enables = vector->int_mask;
    316 	}
    317 
    318 	int_sts &= int_enables;
    319 	int_sts &= vector->int_mask;
    320 	if (int_sts) {
    321 		if (vector->handler) {
    322 			vector->handler(vector->context,
    323 					int_sts, vector->flags);
    324 		} else {
    325 			/* disable interrupts on this vector */
    326 			lan743x_csr_write(adapter, INT_EN_CLR,
    327 					  vector->int_mask);
    328 		}
    329 		result = IRQ_HANDLED;
    330 	}
    331 
    332 	if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
    333 		/* enable master interrupt */
    334 		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
    335 
    336 	if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
    337 		/* enable vector interrupt */
    338 		lan743x_csr_write(adapter,
    339 				  INT_VEC_EN_SET,
    340 				  INT_VEC_EN_(vector->vector_index));
    341 irq_done:
    342 	return result;
    343 }
    344 
    345 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
    346 {
    347 	struct lan743x_intr *intr = &adapter->intr;
    348 	int result = -ENODEV;
    349 	int timeout = 10;
    350 
    351 	intr->software_isr_flag = 0;
    352 
    353 	/* enable interrupt */
    354 	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
    355 
    356 	/* activate interrupt here */
    357 	lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
    358 	while ((timeout > 0) && (!(intr->software_isr_flag))) {
    359 		usleep_range(1000, 20000);
    360 		timeout--;
    361 	}
    362 
    363 	if (intr->software_isr_flag)
    364 		result = 0;
    365 
    366 	/* disable interrupts */
    367 	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
    368 	return result;
    369 }
    370 
    371 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
    372 				     int vector_index, u32 flags,
    373 				     u32 int_mask,
    374 				     lan743x_vector_handler handler,
    375 				     void *context)
    376 {
    377 	struct lan743x_vector *vector = &adapter->intr.vector_list
    378 					[vector_index];
    379 	int ret;
    380 
    381 	vector->adapter = adapter;
    382 	vector->flags = flags;
    383 	vector->vector_index = vector_index;
    384 	vector->int_mask = int_mask;
    385 	vector->handler = handler;
    386 	vector->context = context;
    387 
    388 	ret = request_irq(vector->irq,
    389 			  lan743x_intr_entry_isr,
    390 			  (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
    391 			  IRQF_SHARED : 0, DRIVER_NAME, vector);
    392 	if (ret) {
    393 		vector->handler = NULL;
    394 		vector->context = NULL;
    395 		vector->int_mask = 0;
    396 		vector->flags = 0;
    397 	}
    398 	return ret;
    399 }
    400 
    401 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
    402 					int vector_index)
    403 {
    404 	struct lan743x_vector *vector = &adapter->intr.vector_list
    405 					[vector_index];
    406 
    407 	free_irq(vector->irq, vector);
    408 	vector->handler = NULL;
    409 	vector->context = NULL;
    410 	vector->int_mask = 0;
    411 	vector->flags = 0;
    412 }
    413 
    414 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
    415 					 u32 int_mask)
    416 {
    417 	int index;
    418 
    419 	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
    420 		if (adapter->intr.vector_list[index].int_mask & int_mask)
    421 			return adapter->intr.vector_list[index].flags;
    422 	}
    423 	return 0;
    424 }
    425 
    426 static void lan743x_intr_close(struct lan743x_adapter *adapter)
    427 {
    428 	struct lan743x_intr *intr = &adapter->intr;
    429 	int index = 0;
    430 
    431 	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
    432 	lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
    433 
    434 	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
    435 		if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
    436 			lan743x_intr_unregister_isr(adapter, index);
    437 			intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
    438 		}
    439 	}
    440 
    441 	if (intr->flags & INTR_FLAG_MSI_ENABLED) {
    442 		pci_disable_msi(adapter->pdev);
    443 		intr->flags &= ~INTR_FLAG_MSI_ENABLED;
    444 	}
    445 
    446 	if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
    447 		pci_disable_msix(adapter->pdev);
    448 		intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
    449 	}
    450 }
    451 
    452 static int lan743x_intr_open(struct lan743x_adapter *adapter)
    453 {
    454 	struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
    455 	struct lan743x_intr *intr = &adapter->intr;
    456 	u32 int_vec_en_auto_clr = 0;
    457 	u32 int_vec_map0 = 0;
    458 	u32 int_vec_map1 = 0;
    459 	int ret = -ENODEV;
    460 	int index = 0;
    461 	u32 flags = 0;
    462 
    463 	intr->number_of_vectors = 0;
    464 
    465 	/* Try to set up MSIX interrupts */
    466 	memset(&msix_entries[0], 0,
    467 	       sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
    468 	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
    469 		msix_entries[index].entry = index;
    470 	ret = pci_enable_msix_range(adapter->pdev,
    471 				    msix_entries, 1,
    472 				    1 + LAN743X_USED_TX_CHANNELS +
    473 				    LAN743X_USED_RX_CHANNELS);
    474 
    475 	if (ret > 0) {
    476 		intr->flags |= INTR_FLAG_MSIX_ENABLED;
    477 		intr->number_of_vectors = ret;
    478 		intr->using_vectors = true;
    479 		for (index = 0; index < intr->number_of_vectors; index++)
    480 			intr->vector_list[index].irq = msix_entries
    481 						       [index].vector;
    482 		netif_info(adapter, ifup, adapter->netdev,
    483 			   "using MSIX interrupts, number of vectors = %d\n",
    484 			   intr->number_of_vectors);
    485 	}
    486 
    487 	/* If MSIX failed try to setup using MSI interrupts */
    488 	if (!intr->number_of_vectors) {
    489 		if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
    490 			if (!pci_enable_msi(adapter->pdev)) {
    491 				intr->flags |= INTR_FLAG_MSI_ENABLED;
    492 				intr->number_of_vectors = 1;
    493 				intr->using_vectors = true;
    494 				intr->vector_list[0].irq =
    495 					adapter->pdev->irq;
    496 				netif_info(adapter, ifup, adapter->netdev,
    497 					   "using MSI interrupts, number of vectors = %d\n",
    498 					   intr->number_of_vectors);
    499 			}
    500 		}
    501 	}
    502 
    503 	/* If MSIX, and MSI failed, setup using legacy interrupt */
    504 	if (!intr->number_of_vectors) {
    505 		intr->number_of_vectors = 1;
    506 		intr->using_vectors = false;
    507 		intr->vector_list[0].irq = intr->irq;
    508 		netif_info(adapter, ifup, adapter->netdev,
    509 			   "using legacy interrupts\n");
    510 	}
    511 
    512 	/* At this point we must have at least one irq */
    513 	lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
    514 
    515 	/* map all interrupts to vector 0 */
    516 	lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
    517 	lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
    518 	lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
    519 	flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
    520 		LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
    521 		LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
    522 		LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
    523 
    524 	if (intr->using_vectors) {
    525 		flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
    526 			 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
    527 	} else {
    528 		flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
    529 			 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
    530 			 LAN743X_VECTOR_FLAG_IRQ_SHARED;
    531 	}
    532 
    533 	if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
    534 		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
    535 		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
    536 		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
    537 		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
    538 		flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
    539 		flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
    540 	}
    541 
    542 	ret = lan743x_intr_register_isr(adapter, 0, flags,
    543 					INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
    544 					INT_BIT_ALL_OTHER_,
    545 					lan743x_intr_shared_isr, adapter);
    546 	if (ret)
    547 		goto clean_up;
    548 	intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
    549 
    550 	if (intr->using_vectors)
    551 		lan743x_csr_write(adapter, INT_VEC_EN_SET,
    552 				  INT_VEC_EN_(0));
    553 
    554 	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
    555 		lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
    556 		lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
    557 		lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
    558 		lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
    559 		lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
    560 		lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
    561 		lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
    562 		lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
    563 		lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
    564 		lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
    565 		lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
    566 	}
    567 
    568 	/* enable interrupts */
    569 	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
    570 	ret = lan743x_intr_test_isr(adapter);
    571 	if (ret)
    572 		goto clean_up;
    573 
    574 	if (intr->number_of_vectors > 1) {
    575 		int number_of_tx_vectors = intr->number_of_vectors - 1;
    576 
    577 		if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
    578 			number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
    579 		flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
    580 			LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
    581 			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
    582 			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
    583 			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
    584 			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
    585 
    586 		if (adapter->csr.flags &
    587 		   LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
    588 			flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
    589 				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
    590 				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
    591 				LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
    592 		}
    593 
    594 		for (index = 0; index < number_of_tx_vectors; index++) {
    595 			u32 int_bit = INT_BIT_DMA_TX_(index);
    596 			int vector = index + 1;
    597 
    598 			/* map TX interrupt to vector */
    599 			int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
    600 			lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
    601 
    602 			/* Remove TX interrupt from shared mask */
    603 			intr->vector_list[0].int_mask &= ~int_bit;
    604 			ret = lan743x_intr_register_isr(adapter, vector, flags,
    605 							int_bit, lan743x_tx_isr,
    606 							&adapter->tx[index]);
    607 			if (ret)
    608 				goto clean_up;
    609 			intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
    610 			if (!(flags &
    611 			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
    612 				lan743x_csr_write(adapter, INT_VEC_EN_SET,
    613 						  INT_VEC_EN_(vector));
    614 		}
    615 	}
    616 	if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
    617 		int number_of_rx_vectors = intr->number_of_vectors -
    618 					   LAN743X_USED_TX_CHANNELS - 1;
    619 
    620 		if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
    621 			number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
    622 
    623 		flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
    624 			LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
    625 			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
    626 			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
    627 			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
    628 			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
    629 
    630 		if (adapter->csr.flags &
    631 		    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
    632 			flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
    633 				LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
    634 				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
    635 				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
    636 				LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
    637 		}
    638 		for (index = 0; index < number_of_rx_vectors; index++) {
    639 			int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
    640 			u32 int_bit = INT_BIT_DMA_RX_(index);
    641 
    642 			/* map RX interrupt to vector */
    643 			int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
    644 			lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
    645 			if (flags &
    646 			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
    647 				int_vec_en_auto_clr |= INT_VEC_EN_(vector);
    648 				lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
    649 						  int_vec_en_auto_clr);
    650 			}
    651 
    652 			/* Remove RX interrupt from shared mask */
    653 			intr->vector_list[0].int_mask &= ~int_bit;
    654 			ret = lan743x_intr_register_isr(adapter, vector, flags,
    655 							int_bit, lan743x_rx_isr,
    656 							&adapter->rx[index]);
    657 			if (ret)
    658 				goto clean_up;
    659 			intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
    660 
    661 			lan743x_csr_write(adapter, INT_VEC_EN_SET,
    662 					  INT_VEC_EN_(vector));
    663 		}
    664 	}
    665 	return 0;
    666 
    667 clean_up:
    668 	lan743x_intr_close(adapter);
    669 	return ret;
    670 }
    671 
    672 static int lan743x_dp_write(struct lan743x_adapter *adapter,
    673 			    u32 select, u32 addr, u32 length, u32 *buf)
    674 {
    675 	int ret = -EIO;
    676 	u32 dp_sel;
    677 	int i;
    678 
    679 	mutex_lock(&adapter->dp_lock);
    680 	if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
    681 				     1, 40, 100, 100))
    682 		goto unlock;
    683 	dp_sel = lan743x_csr_read(adapter, DP_SEL);
    684 	dp_sel &= ~DP_SEL_MASK_;
    685 	dp_sel |= select;
    686 	lan743x_csr_write(adapter, DP_SEL, dp_sel);
    687 
    688 	for (i = 0; i < length; i++) {
    689 		lan743x_csr_write(adapter, DP_ADDR, addr + i);
    690 		lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
    691 		lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
    692 		if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
    693 					     1, 40, 100, 100))
    694 			goto unlock;
    695 	}
    696 	ret = 0;
    697 
    698 unlock:
    699 	mutex_unlock(&adapter->dp_lock);
    700 	return ret;
    701 }
    702 
    703 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
    704 {
    705 	u32 ret;
    706 
    707 	ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
    708 		MAC_MII_ACC_PHY_ADDR_MASK_;
    709 	ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
    710 		MAC_MII_ACC_MIIRINDA_MASK_;
    711 
    712 	if (read)
    713 		ret |= MAC_MII_ACC_MII_READ_;
    714 	else
    715 		ret |= MAC_MII_ACC_MII_WRITE_;
    716 	ret |= MAC_MII_ACC_MII_BUSY_;
    717 
    718 	return ret;
    719 }
    720 
    721 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
    722 {
    723 	u32 data;
    724 
    725 	return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
    726 				  !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
    727 }
    728 
    729 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
    730 {
    731 	struct lan743x_adapter *adapter = bus->priv;
    732 	u32 val, mii_access;
    733 	int ret;
    734 
    735 	/* comfirm MII not busy */
    736 	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
    737 	if (ret < 0)
    738 		return ret;
    739 
    740 	/* set the address, index & direction (read from PHY) */
    741 	mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
    742 	lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
    743 	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
    744 	if (ret < 0)
    745 		return ret;
    746 
    747 	val = lan743x_csr_read(adapter, MAC_MII_DATA);
    748 	return (int)(val & 0xFFFF);
    749 }
    750 
    751 static int lan743x_mdiobus_write(struct mii_bus *bus,
    752 				 int phy_id, int index, u16 regval)
    753 {
    754 	struct lan743x_adapter *adapter = bus->priv;
    755 	u32 val, mii_access;
    756 	int ret;
    757 
    758 	/* confirm MII not busy */
    759 	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
    760 	if (ret < 0)
    761 		return ret;
    762 	val = (u32)regval;
    763 	lan743x_csr_write(adapter, MAC_MII_DATA, val);
    764 
    765 	/* set the address, index & direction (write to PHY) */
    766 	mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
    767 	lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
    768 	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
    769 	return ret;
    770 }
    771 
    772 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
    773 				    u8 *addr)
    774 {
    775 	u32 addr_lo, addr_hi;
    776 
    777 	addr_lo = addr[0] |
    778 		addr[1] << 8 |
    779 		addr[2] << 16 |
    780 		addr[3] << 24;
    781 	addr_hi = addr[4] |
    782 		addr[5] << 8;
    783 	lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
    784 	lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
    785 
    786 	ether_addr_copy(adapter->mac_address, addr);
    787 	netif_info(adapter, drv, adapter->netdev,
    788 		   "MAC address set to %pM\n", addr);
    789 }
    790 
    791 static int lan743x_mac_init(struct lan743x_adapter *adapter)
    792 {
    793 	bool mac_address_valid = true;
    794 	struct net_device *netdev;
    795 	u32 mac_addr_hi = 0;
    796 	u32 mac_addr_lo = 0;
    797 	u32 data;
    798 
    799 	netdev = adapter->netdev;
    800 
    801 	/* setup auto duplex, and speed detection */
    802 	data = lan743x_csr_read(adapter, MAC_CR);
    803 	data |= MAC_CR_ADD_ | MAC_CR_ASD_;
    804 	data |= MAC_CR_CNTR_RST_;
    805 	lan743x_csr_write(adapter, MAC_CR, data);
    806 
    807 	mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
    808 	mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
    809 	adapter->mac_address[0] = mac_addr_lo & 0xFF;
    810 	adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
    811 	adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
    812 	adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
    813 	adapter->mac_address[4] = mac_addr_hi & 0xFF;
    814 	adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
    815 
    816 	if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
    817 	    mac_addr_lo == 0xFFFFFFFF) {
    818 		mac_address_valid = false;
    819 	} else if (!is_valid_ether_addr(adapter->mac_address)) {
    820 		mac_address_valid = false;
    821 	}
    822 
    823 	if (!mac_address_valid)
    824 		eth_random_addr(adapter->mac_address);
    825 	lan743x_mac_set_address(adapter, adapter->mac_address);
    826 	ether_addr_copy(netdev->dev_addr, adapter->mac_address);
    827 	return 0;
    828 }
    829 
    830 static int lan743x_mac_open(struct lan743x_adapter *adapter)
    831 {
    832 	int ret = 0;
    833 	u32 temp;
    834 
    835 	temp = lan743x_csr_read(adapter, MAC_RX);
    836 	lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
    837 	temp = lan743x_csr_read(adapter, MAC_TX);
    838 	lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
    839 	return ret;
    840 }
    841 
    842 static void lan743x_mac_close(struct lan743x_adapter *adapter)
    843 {
    844 	u32 temp;
    845 
    846 	temp = lan743x_csr_read(adapter, MAC_TX);
    847 	temp &= ~MAC_TX_TXEN_;
    848 	lan743x_csr_write(adapter, MAC_TX, temp);
    849 	lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
    850 				 1, 1000, 20000, 100);
    851 
    852 	temp = lan743x_csr_read(adapter, MAC_RX);
    853 	temp &= ~MAC_RX_RXEN_;
    854 	lan743x_csr_write(adapter, MAC_RX, temp);
    855 	lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
    856 				 1, 1000, 20000, 100);
    857 }
    858 
    859 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
    860 					      bool tx_enable, bool rx_enable)
    861 {
    862 	u32 flow_setting = 0;
    863 
    864 	/* set maximum pause time because when fifo space frees
    865 	 * up a zero value pause frame will be sent to release the pause
    866 	 */
    867 	flow_setting = MAC_FLOW_CR_FCPT_MASK_;
    868 	if (tx_enable)
    869 		flow_setting |= MAC_FLOW_CR_TX_FCEN_;
    870 	if (rx_enable)
    871 		flow_setting |= MAC_FLOW_CR_RX_FCEN_;
    872 	lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
    873 }
    874 
    875 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
    876 {
    877 	int enabled = 0;
    878 	u32 mac_rx = 0;
    879 
    880 	mac_rx = lan743x_csr_read(adapter, MAC_RX);
    881 	if (mac_rx & MAC_RX_RXEN_) {
    882 		enabled = 1;
    883 		if (mac_rx & MAC_RX_RXD_) {
    884 			lan743x_csr_write(adapter, MAC_RX, mac_rx);
    885 			mac_rx &= ~MAC_RX_RXD_;
    886 		}
    887 		mac_rx &= ~MAC_RX_RXEN_;
    888 		lan743x_csr_write(adapter, MAC_RX, mac_rx);
    889 		lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
    890 					 1, 1000, 20000, 100);
    891 		lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
    892 	}
    893 
    894 	mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
    895 	mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
    896 		  MAC_RX_MAX_SIZE_MASK_);
    897 	lan743x_csr_write(adapter, MAC_RX, mac_rx);
    898 
    899 	if (enabled) {
    900 		mac_rx |= MAC_RX_RXEN_;
    901 		lan743x_csr_write(adapter, MAC_RX, mac_rx);
    902 	}
    903 	return 0;
    904 }
    905 
    906 /* PHY */
    907 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
    908 {
    909 	u32 data;
    910 
    911 	/* Only called with in probe, and before mdiobus_register */
    912 
    913 	data = lan743x_csr_read(adapter, PMT_CTL);
    914 	data |= PMT_CTL_ETH_PHY_RST_;
    915 	lan743x_csr_write(adapter, PMT_CTL, data);
    916 
    917 	return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
    918 				  (!(data & PMT_CTL_ETH_PHY_RST_) &&
    919 				  (data & PMT_CTL_READY_)),
    920 				  50000, 1000000);
    921 }
    922 
    923 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
    924 					   u8 duplex, u16 local_adv,
    925 					   u16 remote_adv)
    926 {
    927 	struct lan743x_phy *phy = &adapter->phy;
    928 	u8 cap;
    929 
    930 	if (phy->fc_autoneg)
    931 		cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
    932 	else
    933 		cap = phy->fc_request_control;
    934 
    935 	lan743x_mac_flow_ctrl_set_enables(adapter,
    936 					  cap & FLOW_CTRL_TX,
    937 					  cap & FLOW_CTRL_RX);
    938 }
    939 
    940 static int lan743x_phy_init(struct lan743x_adapter *adapter)
    941 {
    942 	return lan743x_phy_reset(adapter);
    943 }
    944 
    945 static void lan743x_phy_link_status_change(struct net_device *netdev)
    946 {
    947 	struct lan743x_adapter *adapter = netdev_priv(netdev);
    948 	struct phy_device *phydev = netdev->phydev;
    949 
    950 	phy_print_status(phydev);
    951 	if (phydev->state == PHY_RUNNING) {
    952 		struct ethtool_link_ksettings ksettings;
    953 		int remote_advertisement = 0;
    954 		int local_advertisement = 0;
    955 
    956 		memset(&ksettings, 0, sizeof(ksettings));
    957 		phy_ethtool_get_link_ksettings(netdev, &ksettings);
    958 		local_advertisement =
    959 			linkmode_adv_to_mii_adv_t(phydev->advertising);
    960 		remote_advertisement =
    961 			linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
    962 
    963 		lan743x_phy_update_flowcontrol(adapter,
    964 					       ksettings.base.duplex,
    965 					       local_advertisement,
    966 					       remote_advertisement);
    967 		lan743x_ptp_update_latency(adapter, ksettings.base.speed);
    968 	}
    969 }
    970 
    971 static void lan743x_phy_close(struct lan743x_adapter *adapter)
    972 {
    973 	struct net_device *netdev = adapter->netdev;
    974 
    975 	phy_stop(netdev->phydev);
    976 	phy_disconnect(netdev->phydev);
    977 	netdev->phydev = NULL;
    978 }
    979 
    980 static int lan743x_phy_open(struct lan743x_adapter *adapter)
    981 {
    982 	struct lan743x_phy *phy = &adapter->phy;
    983 	struct phy_device *phydev;
    984 	struct net_device *netdev;
    985 	int ret = -EIO;
    986 
    987 	netdev = adapter->netdev;
    988 	phydev = phy_find_first(adapter->mdiobus);
    989 	if (!phydev)
    990 		goto return_error;
    991 
    992 	ret = phy_connect_direct(netdev, phydev,
    993 				 lan743x_phy_link_status_change,
    994 				 PHY_INTERFACE_MODE_GMII);
    995 	if (ret)
    996 		goto return_error;
    997 
    998 	/* MAC doesn't support 1000T Half */
    999 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
   1000 
   1001 	/* support both flow controls */
   1002 	phy_support_asym_pause(phydev);
   1003 	phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
   1004 	phy->fc_autoneg = phydev->autoneg;
   1005 
   1006 	phy_start(phydev);
   1007 	phy_start_aneg(phydev);
   1008 	return 0;
   1009 
   1010 return_error:
   1011 	return ret;
   1012 }
   1013 
   1014 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
   1015 {
   1016 	lan743x_csr_write(adapter, RFE_RSS_CFG,
   1017 		RFE_RSS_CFG_UDP_IPV6_EX_ |
   1018 		RFE_RSS_CFG_TCP_IPV6_EX_ |
   1019 		RFE_RSS_CFG_IPV6_EX_ |
   1020 		RFE_RSS_CFG_UDP_IPV6_ |
   1021 		RFE_RSS_CFG_TCP_IPV6_ |
   1022 		RFE_RSS_CFG_IPV6_ |
   1023 		RFE_RSS_CFG_UDP_IPV4_ |
   1024 		RFE_RSS_CFG_TCP_IPV4_ |
   1025 		RFE_RSS_CFG_IPV4_ |
   1026 		RFE_RSS_CFG_VALID_HASH_BITS_ |
   1027 		RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
   1028 		RFE_RSS_CFG_RSS_HASH_STORE_ |
   1029 		RFE_RSS_CFG_RSS_ENABLE_);
   1030 }
   1031 
   1032 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
   1033 {
   1034 	u8 *mac_addr;
   1035 	u32 mac_addr_hi = 0;
   1036 	u32 mac_addr_lo = 0;
   1037 
   1038 	/* Add mac address to perfect Filter */
   1039 	mac_addr = adapter->mac_address;
   1040 	mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
   1041 		      (((u32)(mac_addr[1])) << 8) |
   1042 		      (((u32)(mac_addr[2])) << 16) |
   1043 		      (((u32)(mac_addr[3])) << 24));
   1044 	mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
   1045 		      (((u32)(mac_addr[5])) << 8));
   1046 
   1047 	lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
   1048 	lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
   1049 			  mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
   1050 }
   1051 
   1052 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
   1053 {
   1054 	struct net_device *netdev = adapter->netdev;
   1055 	u32 hash_table[DP_SEL_VHF_HASH_LEN];
   1056 	u32 rfctl;
   1057 	u32 data;
   1058 
   1059 	rfctl = lan743x_csr_read(adapter, RFE_CTL);
   1060 	rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
   1061 		 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
   1062 	rfctl |= RFE_CTL_AB_;
   1063 	if (netdev->flags & IFF_PROMISC) {
   1064 		rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
   1065 	} else {
   1066 		if (netdev->flags & IFF_ALLMULTI)
   1067 			rfctl |= RFE_CTL_AM_;
   1068 	}
   1069 
   1070 	memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
   1071 	if (netdev_mc_count(netdev)) {
   1072 		struct netdev_hw_addr *ha;
   1073 		int i;
   1074 
   1075 		rfctl |= RFE_CTL_DA_PERFECT_;
   1076 		i = 1;
   1077 		netdev_for_each_mc_addr(ha, netdev) {
   1078 			/* set first 32 into Perfect Filter */
   1079 			if (i < 33) {
   1080 				lan743x_csr_write(adapter,
   1081 						  RFE_ADDR_FILT_HI(i), 0);
   1082 				data = ha->addr[3];
   1083 				data = ha->addr[2] | (data << 8);
   1084 				data = ha->addr[1] | (data << 8);
   1085 				data = ha->addr[0] | (data << 8);
   1086 				lan743x_csr_write(adapter,
   1087 						  RFE_ADDR_FILT_LO(i), data);
   1088 				data = ha->addr[5];
   1089 				data = ha->addr[4] | (data << 8);
   1090 				data |= RFE_ADDR_FILT_HI_VALID_;
   1091 				lan743x_csr_write(adapter,
   1092 						  RFE_ADDR_FILT_HI(i), data);
   1093 			} else {
   1094 				u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
   1095 					     23) & 0x1FF;
   1096 				hash_table[bitnum / 32] |= (1 << (bitnum % 32));
   1097 				rfctl |= RFE_CTL_MCAST_HASH_;
   1098 			}
   1099 			i++;
   1100 		}
   1101 	}
   1102 
   1103 	lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
   1104 			 DP_SEL_VHF_VLAN_LEN,
   1105 			 DP_SEL_VHF_HASH_LEN, hash_table);
   1106 	lan743x_csr_write(adapter, RFE_CTL, rfctl);
   1107 }
   1108 
   1109 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
   1110 {
   1111 	u32 data = 0;
   1112 
   1113 	lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
   1114 	lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
   1115 				 0, 1000, 20000, 100);
   1116 	switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
   1117 	case DMA_DESCRIPTOR_SPACING_16:
   1118 		data = DMAC_CFG_MAX_DSPACE_16_;
   1119 		break;
   1120 	case DMA_DESCRIPTOR_SPACING_32:
   1121 		data = DMAC_CFG_MAX_DSPACE_32_;
   1122 		break;
   1123 	case DMA_DESCRIPTOR_SPACING_64:
   1124 		data = DMAC_CFG_MAX_DSPACE_64_;
   1125 		break;
   1126 	case DMA_DESCRIPTOR_SPACING_128:
   1127 		data = DMAC_CFG_MAX_DSPACE_128_;
   1128 		break;
   1129 	default:
   1130 		return -EPERM;
   1131 	}
   1132 	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
   1133 		data |= DMAC_CFG_COAL_EN_;
   1134 	data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
   1135 	data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
   1136 	lan743x_csr_write(adapter, DMAC_CFG, data);
   1137 	data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
   1138 	data |= DMAC_COAL_CFG_TIMER_TX_START_;
   1139 	data |= DMAC_COAL_CFG_FLUSH_INTS_;
   1140 	data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
   1141 	data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
   1142 	data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
   1143 	data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
   1144 	lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
   1145 	data = DMAC_OBFF_TX_THRES_SET_(0x08);
   1146 	data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
   1147 	lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
   1148 	return 0;
   1149 }
   1150 
   1151 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
   1152 				     int tx_channel)
   1153 {
   1154 	u32 dmac_cmd = 0;
   1155 
   1156 	dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
   1157 	return DMAC_CHANNEL_STATE_SET((dmac_cmd &
   1158 				      DMAC_CMD_START_T_(tx_channel)),
   1159 				      (dmac_cmd &
   1160 				      DMAC_CMD_STOP_T_(tx_channel)));
   1161 }
   1162 
   1163 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
   1164 					     int tx_channel)
   1165 {
   1166 	int timeout = 100;
   1167 	int result = 0;
   1168 
   1169 	while (timeout &&
   1170 	       ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
   1171 	       DMAC_CHANNEL_STATE_STOP_PENDING)) {
   1172 		usleep_range(1000, 20000);
   1173 		timeout--;
   1174 	}
   1175 	if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
   1176 		result = -ENODEV;
   1177 	return result;
   1178 }
   1179 
   1180 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
   1181 				     int rx_channel)
   1182 {
   1183 	u32 dmac_cmd = 0;
   1184 
   1185 	dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
   1186 	return DMAC_CHANNEL_STATE_SET((dmac_cmd &
   1187 				      DMAC_CMD_START_R_(rx_channel)),
   1188 				      (dmac_cmd &
   1189 				      DMAC_CMD_STOP_R_(rx_channel)));
   1190 }
   1191 
   1192 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
   1193 					     int rx_channel)
   1194 {
   1195 	int timeout = 100;
   1196 	int result = 0;
   1197 
   1198 	while (timeout &&
   1199 	       ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
   1200 	       DMAC_CHANNEL_STATE_STOP_PENDING)) {
   1201 		usleep_range(1000, 20000);
   1202 		timeout--;
   1203 	}
   1204 	if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
   1205 		result = -ENODEV;
   1206 	return result;
   1207 }
   1208 
   1209 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
   1210 				    int descriptor_index, bool cleanup)
   1211 {
   1212 	struct lan743x_tx_buffer_info *buffer_info = NULL;
   1213 	struct lan743x_tx_descriptor *descriptor = NULL;
   1214 	u32 descriptor_type = 0;
   1215 	bool ignore_sync;
   1216 
   1217 	descriptor = &tx->ring_cpu_ptr[descriptor_index];
   1218 	buffer_info = &tx->buffer_info[descriptor_index];
   1219 	if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
   1220 		goto done;
   1221 
   1222 	descriptor_type = (descriptor->data0) &
   1223 			  TX_DESC_DATA0_DTYPE_MASK_;
   1224 	if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
   1225 		goto clean_up_data_descriptor;
   1226 	else
   1227 		goto clear_active;
   1228 
   1229 clean_up_data_descriptor:
   1230 	if (buffer_info->dma_ptr) {
   1231 		if (buffer_info->flags &
   1232 		    TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
   1233 			dma_unmap_page(&tx->adapter->pdev->dev,
   1234 				       buffer_info->dma_ptr,
   1235 				       buffer_info->buffer_length,
   1236 				       DMA_TO_DEVICE);
   1237 		} else {
   1238 			dma_unmap_single(&tx->adapter->pdev->dev,
   1239 					 buffer_info->dma_ptr,
   1240 					 buffer_info->buffer_length,
   1241 					 DMA_TO_DEVICE);
   1242 		}
   1243 		buffer_info->dma_ptr = 0;
   1244 		buffer_info->buffer_length = 0;
   1245 	}
   1246 	if (!buffer_info->skb)
   1247 		goto clear_active;
   1248 
   1249 	if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
   1250 		dev_kfree_skb(buffer_info->skb);
   1251 		goto clear_skb;
   1252 	}
   1253 
   1254 	if (cleanup) {
   1255 		lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
   1256 		dev_kfree_skb(buffer_info->skb);
   1257 	} else {
   1258 		ignore_sync = (buffer_info->flags &
   1259 			       TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
   1260 		lan743x_ptp_tx_timestamp_skb(tx->adapter,
   1261 					     buffer_info->skb, ignore_sync);
   1262 	}
   1263 
   1264 clear_skb:
   1265 	buffer_info->skb = NULL;
   1266 
   1267 clear_active:
   1268 	buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
   1269 
   1270 done:
   1271 	memset(buffer_info, 0, sizeof(*buffer_info));
   1272 	memset(descriptor, 0, sizeof(*descriptor));
   1273 }
   1274 
   1275 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
   1276 {
   1277 	return ((++index) % tx->ring_size);
   1278 }
   1279 
   1280 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
   1281 {
   1282 	while ((*tx->head_cpu_ptr) != (tx->last_head)) {
   1283 		lan743x_tx_release_desc(tx, tx->last_head, false);
   1284 		tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
   1285 	}
   1286 }
   1287 
   1288 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
   1289 {
   1290 	u32 original_head = 0;
   1291 
   1292 	original_head = tx->last_head;
   1293 	do {
   1294 		lan743x_tx_release_desc(tx, tx->last_head, true);
   1295 		tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
   1296 	} while (tx->last_head != original_head);
   1297 	memset(tx->ring_cpu_ptr, 0,
   1298 	       sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
   1299 	memset(tx->buffer_info, 0,
   1300 	       sizeof(*tx->buffer_info) * (tx->ring_size));
   1301 }
   1302 
   1303 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
   1304 				   struct sk_buff *skb)
   1305 {
   1306 	int result = 1; /* 1 for the main skb buffer */
   1307 	int nr_frags = 0;
   1308 
   1309 	if (skb_is_gso(skb))
   1310 		result++; /* requires an extension descriptor */
   1311 	nr_frags = skb_shinfo(skb)->nr_frags;
   1312 	result += nr_frags; /* 1 for each fragment buffer */
   1313 	return result;
   1314 }
   1315 
   1316 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
   1317 {
   1318 	int last_head = tx->last_head;
   1319 	int last_tail = tx->last_tail;
   1320 
   1321 	if (last_tail >= last_head)
   1322 		return tx->ring_size - last_tail + last_head - 1;
   1323 	else
   1324 		return last_head - last_tail - 1;
   1325 }
   1326 
   1327 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
   1328 				      bool enable_timestamping,
   1329 				      bool enable_onestep_sync)
   1330 {
   1331 	if (enable_timestamping)
   1332 		tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
   1333 	else
   1334 		tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
   1335 	if (enable_onestep_sync)
   1336 		tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
   1337 	else
   1338 		tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
   1339 }
   1340 
   1341 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
   1342 				  unsigned char *first_buffer,
   1343 				  unsigned int first_buffer_length,
   1344 				  unsigned int frame_length,
   1345 				  bool time_stamp,
   1346 				  bool check_sum)
   1347 {
   1348 	/* called only from within lan743x_tx_xmit_frame.
   1349 	 * assuming tx->ring_lock has already been acquired.
   1350 	 */
   1351 	struct lan743x_tx_descriptor *tx_descriptor = NULL;
   1352 	struct lan743x_tx_buffer_info *buffer_info = NULL;
   1353 	struct lan743x_adapter *adapter = tx->adapter;
   1354 	struct device *dev = &adapter->pdev->dev;
   1355 	dma_addr_t dma_ptr;
   1356 
   1357 	tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
   1358 	tx->frame_first = tx->last_tail;
   1359 	tx->frame_tail = tx->frame_first;
   1360 
   1361 	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
   1362 	buffer_info = &tx->buffer_info[tx->frame_tail];
   1363 	dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
   1364 				 DMA_TO_DEVICE);
   1365 	if (dma_mapping_error(dev, dma_ptr))
   1366 		return -ENOMEM;
   1367 
   1368 	tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
   1369 	tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
   1370 	tx_descriptor->data3 = (frame_length << 16) &
   1371 		TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
   1372 
   1373 	buffer_info->skb = NULL;
   1374 	buffer_info->dma_ptr = dma_ptr;
   1375 	buffer_info->buffer_length = first_buffer_length;
   1376 	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
   1377 
   1378 	tx->frame_data0 = (first_buffer_length &
   1379 		TX_DESC_DATA0_BUF_LENGTH_MASK_) |
   1380 		TX_DESC_DATA0_DTYPE_DATA_ |
   1381 		TX_DESC_DATA0_FS_ |
   1382 		TX_DESC_DATA0_FCS_;
   1383 	if (time_stamp)
   1384 		tx->frame_data0 |= TX_DESC_DATA0_TSE_;
   1385 
   1386 	if (check_sum)
   1387 		tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
   1388 				   TX_DESC_DATA0_IPE_ |
   1389 				   TX_DESC_DATA0_TPE_;
   1390 
   1391 	/* data0 will be programmed in one of other frame assembler functions */
   1392 	return 0;
   1393 }
   1394 
   1395 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
   1396 				     unsigned int frame_length,
   1397 				     int nr_frags)
   1398 {
   1399 	/* called only from within lan743x_tx_xmit_frame.
   1400 	 * assuming tx->ring_lock has already been acquired.
   1401 	 */
   1402 	struct lan743x_tx_descriptor *tx_descriptor = NULL;
   1403 	struct lan743x_tx_buffer_info *buffer_info = NULL;
   1404 
   1405 	/* wrap up previous descriptor */
   1406 	tx->frame_data0 |= TX_DESC_DATA0_EXT_;
   1407 	if (nr_frags <= 0) {
   1408 		tx->frame_data0 |= TX_DESC_DATA0_LS_;
   1409 		tx->frame_data0 |= TX_DESC_DATA0_IOC_;
   1410 	}
   1411 	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
   1412 	tx_descriptor->data0 = tx->frame_data0;
   1413 
   1414 	/* move to next descriptor */
   1415 	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
   1416 	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
   1417 	buffer_info = &tx->buffer_info[tx->frame_tail];
   1418 
   1419 	/* add extension descriptor */
   1420 	tx_descriptor->data1 = 0;
   1421 	tx_descriptor->data2 = 0;
   1422 	tx_descriptor->data3 = 0;
   1423 
   1424 	buffer_info->skb = NULL;
   1425 	buffer_info->dma_ptr = 0;
   1426 	buffer_info->buffer_length = 0;
   1427 	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
   1428 
   1429 	tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
   1430 			  TX_DESC_DATA0_DTYPE_EXT_ |
   1431 			  TX_DESC_DATA0_EXT_LSO_;
   1432 
   1433 	/* data0 will be programmed in one of other frame assembler functions */
   1434 }
   1435 
   1436 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
   1437 					 const struct skb_frag_struct *fragment,
   1438 					 unsigned int frame_length)
   1439 {
   1440 	/* called only from within lan743x_tx_xmit_frame
   1441 	 * assuming tx->ring_lock has already been acquired
   1442 	 */
   1443 	struct lan743x_tx_descriptor *tx_descriptor = NULL;
   1444 	struct lan743x_tx_buffer_info *buffer_info = NULL;
   1445 	struct lan743x_adapter *adapter = tx->adapter;
   1446 	struct device *dev = &adapter->pdev->dev;
   1447 	unsigned int fragment_length = 0;
   1448 	dma_addr_t dma_ptr;
   1449 
   1450 	fragment_length = skb_frag_size(fragment);
   1451 	if (!fragment_length)
   1452 		return 0;
   1453 
   1454 	/* wrap up previous descriptor */
   1455 	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
   1456 	tx_descriptor->data0 = tx->frame_data0;
   1457 
   1458 	/* move to next descriptor */
   1459 	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
   1460 	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
   1461 	buffer_info = &tx->buffer_info[tx->frame_tail];
   1462 	dma_ptr = skb_frag_dma_map(dev, fragment,
   1463 				   0, fragment_length,
   1464 				   DMA_TO_DEVICE);
   1465 	if (dma_mapping_error(dev, dma_ptr)) {
   1466 		int desc_index;
   1467 
   1468 		/* cleanup all previously setup descriptors */
   1469 		desc_index = tx->frame_first;
   1470 		while (desc_index != tx->frame_tail) {
   1471 			lan743x_tx_release_desc(tx, desc_index, true);
   1472 			desc_index = lan743x_tx_next_index(tx, desc_index);
   1473 		}
   1474 		dma_wmb();
   1475 		tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
   1476 		tx->frame_first = 0;
   1477 		tx->frame_data0 = 0;
   1478 		tx->frame_tail = 0;
   1479 		return -ENOMEM;
   1480 	}
   1481 
   1482 	tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
   1483 	tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
   1484 	tx_descriptor->data3 = (frame_length << 16) &
   1485 			       TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
   1486 
   1487 	buffer_info->skb = NULL;
   1488 	buffer_info->dma_ptr = dma_ptr;
   1489 	buffer_info->buffer_length = fragment_length;
   1490 	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
   1491 	buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
   1492 
   1493 	tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
   1494 			  TX_DESC_DATA0_DTYPE_DATA_ |
   1495 			  TX_DESC_DATA0_FCS_;
   1496 
   1497 	/* data0 will be programmed in one of other frame assembler functions */
   1498 	return 0;
   1499 }
   1500 
   1501 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
   1502 				 struct sk_buff *skb,
   1503 				 bool time_stamp,
   1504 				 bool ignore_sync)
   1505 {
   1506 	/* called only from within lan743x_tx_xmit_frame
   1507 	 * assuming tx->ring_lock has already been acquired
   1508 	 */
   1509 	struct lan743x_tx_descriptor *tx_descriptor = NULL;
   1510 	struct lan743x_tx_buffer_info *buffer_info = NULL;
   1511 	struct lan743x_adapter *adapter = tx->adapter;
   1512 	u32 tx_tail_flags = 0;
   1513 
   1514 	/* wrap up previous descriptor */
   1515 	if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
   1516 	    TX_DESC_DATA0_DTYPE_DATA_) {
   1517 		tx->frame_data0 |= TX_DESC_DATA0_LS_;
   1518 		tx->frame_data0 |= TX_DESC_DATA0_IOC_;
   1519 	}
   1520 
   1521 	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
   1522 	buffer_info = &tx->buffer_info[tx->frame_tail];
   1523 	buffer_info->skb = skb;
   1524 	if (time_stamp)
   1525 		buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
   1526 	if (ignore_sync)
   1527 		buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
   1528 
   1529 	tx_descriptor->data0 = tx->frame_data0;
   1530 	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
   1531 	tx->last_tail = tx->frame_tail;
   1532 
   1533 	dma_wmb();
   1534 
   1535 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
   1536 		tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
   1537 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
   1538 		tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
   1539 		TX_TAIL_SET_TOP_INT_EN_;
   1540 
   1541 	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
   1542 			  tx_tail_flags | tx->frame_tail);
   1543 	tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
   1544 }
   1545 
   1546 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
   1547 					 struct sk_buff *skb)
   1548 {
   1549 	int required_number_of_descriptors = 0;
   1550 	unsigned int start_frame_length = 0;
   1551 	unsigned int frame_length = 0;
   1552 	unsigned int head_length = 0;
   1553 	unsigned long irq_flags = 0;
   1554 	bool do_timestamp = false;
   1555 	bool ignore_sync = false;
   1556 	int nr_frags = 0;
   1557 	bool gso = false;
   1558 	int j;
   1559 
   1560 	required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
   1561 
   1562 	spin_lock_irqsave(&tx->ring_lock, irq_flags);
   1563 	if (required_number_of_descriptors >
   1564 		lan743x_tx_get_avail_desc(tx)) {
   1565 		if (required_number_of_descriptors > (tx->ring_size - 1)) {
   1566 			dev_kfree_skb(skb);
   1567 		} else {
   1568 			/* save to overflow buffer */
   1569 			tx->overflow_skb = skb;
   1570 			netif_stop_queue(tx->adapter->netdev);
   1571 		}
   1572 		goto unlock;
   1573 	}
   1574 
   1575 	/* space available, transmit skb  */
   1576 	if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
   1577 	    (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
   1578 	    (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
   1579 		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
   1580 		do_timestamp = true;
   1581 		if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
   1582 			ignore_sync = true;
   1583 	}
   1584 	head_length = skb_headlen(skb);
   1585 	frame_length = skb_pagelen(skb);
   1586 	nr_frags = skb_shinfo(skb)->nr_frags;
   1587 	start_frame_length = frame_length;
   1588 	gso = skb_is_gso(skb);
   1589 	if (gso) {
   1590 		start_frame_length = max(skb_shinfo(skb)->gso_size,
   1591 					 (unsigned short)8);
   1592 	}
   1593 
   1594 	if (lan743x_tx_frame_start(tx,
   1595 				   skb->data, head_length,
   1596 				   start_frame_length,
   1597 				   do_timestamp,
   1598 				   skb->ip_summed == CHECKSUM_PARTIAL)) {
   1599 		dev_kfree_skb(skb);
   1600 		goto unlock;
   1601 	}
   1602 
   1603 	if (gso)
   1604 		lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
   1605 
   1606 	if (nr_frags <= 0)
   1607 		goto finish;
   1608 
   1609 	for (j = 0; j < nr_frags; j++) {
   1610 		const struct skb_frag_struct *frag;
   1611 
   1612 		frag = &(skb_shinfo(skb)->frags[j]);
   1613 		if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
   1614 			/* upon error no need to call
   1615 			 *	lan743x_tx_frame_end
   1616 			 * frame assembler clean up was performed inside
   1617 			 *	lan743x_tx_frame_add_fragment
   1618 			 */
   1619 			dev_kfree_skb(skb);
   1620 			goto unlock;
   1621 		}
   1622 	}
   1623 
   1624 finish:
   1625 	lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
   1626 
   1627 unlock:
   1628 	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
   1629 	return NETDEV_TX_OK;
   1630 }
   1631 
   1632 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
   1633 {
   1634 	struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
   1635 	struct lan743x_adapter *adapter = tx->adapter;
   1636 	bool start_transmitter = false;
   1637 	unsigned long irq_flags = 0;
   1638 	u32 ioc_bit = 0;
   1639 	u32 int_sts = 0;
   1640 
   1641 	ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
   1642 	int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
   1643 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
   1644 		lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
   1645 	spin_lock_irqsave(&tx->ring_lock, irq_flags);
   1646 
   1647 	/* clean up tx ring */
   1648 	lan743x_tx_release_completed_descriptors(tx);
   1649 	if (netif_queue_stopped(adapter->netdev)) {
   1650 		if (tx->overflow_skb) {
   1651 			if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
   1652 				lan743x_tx_get_avail_desc(tx))
   1653 				start_transmitter = true;
   1654 		} else {
   1655 			netif_wake_queue(adapter->netdev);
   1656 		}
   1657 	}
   1658 	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
   1659 
   1660 	if (start_transmitter) {
   1661 		/* space is now available, transmit overflow skb */
   1662 		lan743x_tx_xmit_frame(tx, tx->overflow_skb);
   1663 		tx->overflow_skb = NULL;
   1664 		netif_wake_queue(adapter->netdev);
   1665 	}
   1666 
   1667 	if (!napi_complete(napi))
   1668 		goto done;
   1669 
   1670 	/* enable isr */
   1671 	lan743x_csr_write(adapter, INT_EN_SET,
   1672 			  INT_BIT_DMA_TX_(tx->channel_number));
   1673 	lan743x_csr_read(adapter, INT_STS);
   1674 
   1675 done:
   1676 	return 0;
   1677 }
   1678 
   1679 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
   1680 {
   1681 	if (tx->head_cpu_ptr) {
   1682 		pci_free_consistent(tx->adapter->pdev,
   1683 				    sizeof(*tx->head_cpu_ptr),
   1684 				    (void *)(tx->head_cpu_ptr),
   1685 				    tx->head_dma_ptr);
   1686 		tx->head_cpu_ptr = NULL;
   1687 		tx->head_dma_ptr = 0;
   1688 	}
   1689 	kfree(tx->buffer_info);
   1690 	tx->buffer_info = NULL;
   1691 
   1692 	if (tx->ring_cpu_ptr) {
   1693 		pci_free_consistent(tx->adapter->pdev,
   1694 				    tx->ring_allocation_size,
   1695 				    tx->ring_cpu_ptr,
   1696 				    tx->ring_dma_ptr);
   1697 		tx->ring_allocation_size = 0;
   1698 		tx->ring_cpu_ptr = NULL;
   1699 		tx->ring_dma_ptr = 0;
   1700 	}
   1701 	tx->ring_size = 0;
   1702 }
   1703 
   1704 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
   1705 {
   1706 	size_t ring_allocation_size = 0;
   1707 	void *cpu_ptr = NULL;
   1708 	dma_addr_t dma_ptr;
   1709 	int ret = -ENOMEM;
   1710 
   1711 	tx->ring_size = LAN743X_TX_RING_SIZE;
   1712 	if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
   1713 		ret = -EINVAL;
   1714 		goto cleanup;
   1715 	}
   1716 	ring_allocation_size = ALIGN(tx->ring_size *
   1717 				     sizeof(struct lan743x_tx_descriptor),
   1718 				     PAGE_SIZE);
   1719 	dma_ptr = 0;
   1720 	cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
   1721 					ring_allocation_size, &dma_ptr);
   1722 	if (!cpu_ptr) {
   1723 		ret = -ENOMEM;
   1724 		goto cleanup;
   1725 	}
   1726 
   1727 	tx->ring_allocation_size = ring_allocation_size;
   1728 	tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
   1729 	tx->ring_dma_ptr = dma_ptr;
   1730 
   1731 	cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
   1732 	if (!cpu_ptr) {
   1733 		ret = -ENOMEM;
   1734 		goto cleanup;
   1735 	}
   1736 	tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
   1737 	dma_ptr = 0;
   1738 	cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
   1739 					sizeof(*tx->head_cpu_ptr), &dma_ptr);
   1740 	if (!cpu_ptr) {
   1741 		ret = -ENOMEM;
   1742 		goto cleanup;
   1743 	}
   1744 
   1745 	tx->head_cpu_ptr = cpu_ptr;
   1746 	tx->head_dma_ptr = dma_ptr;
   1747 	if (tx->head_dma_ptr & 0x3) {
   1748 		ret = -ENOMEM;
   1749 		goto cleanup;
   1750 	}
   1751 
   1752 	return 0;
   1753 
   1754 cleanup:
   1755 	lan743x_tx_ring_cleanup(tx);
   1756 	return ret;
   1757 }
   1758 
   1759 static void lan743x_tx_close(struct lan743x_tx *tx)
   1760 {
   1761 	struct lan743x_adapter *adapter = tx->adapter;
   1762 
   1763 	lan743x_csr_write(adapter,
   1764 			  DMAC_CMD,
   1765 			  DMAC_CMD_STOP_T_(tx->channel_number));
   1766 	lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
   1767 
   1768 	lan743x_csr_write(adapter,
   1769 			  DMAC_INT_EN_CLR,
   1770 			  DMAC_INT_BIT_TX_IOC_(tx->channel_number));
   1771 	lan743x_csr_write(adapter, INT_EN_CLR,
   1772 			  INT_BIT_DMA_TX_(tx->channel_number));
   1773 	napi_disable(&tx->napi);
   1774 	netif_napi_del(&tx->napi);
   1775 
   1776 	lan743x_csr_write(adapter, FCT_TX_CTL,
   1777 			  FCT_TX_CTL_DIS_(tx->channel_number));
   1778 	lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
   1779 				 FCT_TX_CTL_EN_(tx->channel_number),
   1780 				 0, 1000, 20000, 100);
   1781 
   1782 	lan743x_tx_release_all_descriptors(tx);
   1783 
   1784 	if (tx->overflow_skb) {
   1785 		dev_kfree_skb(tx->overflow_skb);
   1786 		tx->overflow_skb = NULL;
   1787 	}
   1788 
   1789 	lan743x_tx_ring_cleanup(tx);
   1790 }
   1791 
   1792 static int lan743x_tx_open(struct lan743x_tx *tx)
   1793 {
   1794 	struct lan743x_adapter *adapter = NULL;
   1795 	u32 data = 0;
   1796 	int ret;
   1797 
   1798 	adapter = tx->adapter;
   1799 	ret = lan743x_tx_ring_init(tx);
   1800 	if (ret)
   1801 		return ret;
   1802 
   1803 	/* initialize fifo */
   1804 	lan743x_csr_write(adapter, FCT_TX_CTL,
   1805 			  FCT_TX_CTL_RESET_(tx->channel_number));
   1806 	lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
   1807 				 FCT_TX_CTL_RESET_(tx->channel_number),
   1808 				 0, 1000, 20000, 100);
   1809 
   1810 	/* enable fifo */
   1811 	lan743x_csr_write(adapter, FCT_TX_CTL,
   1812 			  FCT_TX_CTL_EN_(tx->channel_number));
   1813 
   1814 	/* reset tx channel */
   1815 	lan743x_csr_write(adapter, DMAC_CMD,
   1816 			  DMAC_CMD_TX_SWR_(tx->channel_number));
   1817 	lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
   1818 				 DMAC_CMD_TX_SWR_(tx->channel_number),
   1819 				 0, 1000, 20000, 100);
   1820 
   1821 	/* Write TX_BASE_ADDR */
   1822 	lan743x_csr_write(adapter,
   1823 			  TX_BASE_ADDRH(tx->channel_number),
   1824 			  DMA_ADDR_HIGH32(tx->ring_dma_ptr));
   1825 	lan743x_csr_write(adapter,
   1826 			  TX_BASE_ADDRL(tx->channel_number),
   1827 			  DMA_ADDR_LOW32(tx->ring_dma_ptr));
   1828 
   1829 	/* Write TX_CFG_B */
   1830 	data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
   1831 	data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
   1832 	data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
   1833 	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
   1834 		data |= TX_CFG_B_TDMABL_512_;
   1835 	lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
   1836 
   1837 	/* Write TX_CFG_A */
   1838 	data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
   1839 	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
   1840 		data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
   1841 		data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
   1842 		data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
   1843 		data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
   1844 	}
   1845 	lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
   1846 
   1847 	/* Write TX_HEAD_WRITEBACK_ADDR */
   1848 	lan743x_csr_write(adapter,
   1849 			  TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
   1850 			  DMA_ADDR_HIGH32(tx->head_dma_ptr));
   1851 	lan743x_csr_write(adapter,
   1852 			  TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
   1853 			  DMA_ADDR_LOW32(tx->head_dma_ptr));
   1854 
   1855 	/* set last head */
   1856 	tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
   1857 
   1858 	/* write TX_TAIL */
   1859 	tx->last_tail = 0;
   1860 	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
   1861 			  (u32)(tx->last_tail));
   1862 	tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
   1863 							 INT_BIT_DMA_TX_
   1864 							 (tx->channel_number));
   1865 	netif_tx_napi_add(adapter->netdev,
   1866 			  &tx->napi, lan743x_tx_napi_poll,
   1867 			  tx->ring_size - 1);
   1868 	napi_enable(&tx->napi);
   1869 
   1870 	data = 0;
   1871 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
   1872 		data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
   1873 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
   1874 		data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
   1875 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
   1876 		data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
   1877 	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
   1878 		data |= TX_CFG_C_TX_INT_EN_R2C_;
   1879 	lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
   1880 
   1881 	if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
   1882 		lan743x_csr_write(adapter, INT_EN_SET,
   1883 				  INT_BIT_DMA_TX_(tx->channel_number));
   1884 	lan743x_csr_write(adapter, DMAC_INT_EN_SET,
   1885 			  DMAC_INT_BIT_TX_IOC_(tx->channel_number));
   1886 
   1887 	/*  start dmac channel */
   1888 	lan743x_csr_write(adapter, DMAC_CMD,
   1889 			  DMAC_CMD_START_T_(tx->channel_number));
   1890 	return 0;
   1891 }
   1892 
   1893 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
   1894 {
   1895 	return ((++index) % rx->ring_size);
   1896 }
   1897 
   1898 static struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx)
   1899 {
   1900 	int length = 0;
   1901 
   1902 	length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
   1903 	return __netdev_alloc_skb(rx->adapter->netdev,
   1904 				  length, GFP_ATOMIC | GFP_DMA);
   1905 }
   1906 
   1907 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
   1908 					struct sk_buff *skb)
   1909 {
   1910 	struct lan743x_rx_buffer_info *buffer_info;
   1911 	struct lan743x_rx_descriptor *descriptor;
   1912 	int length = 0;
   1913 
   1914 	length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
   1915 	descriptor = &rx->ring_cpu_ptr[index];
   1916 	buffer_info = &rx->buffer_info[index];
   1917 	buffer_info->skb = skb;
   1918 	if (!(buffer_info->skb))
   1919 		return -ENOMEM;
   1920 	buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
   1921 					      buffer_info->skb->data,
   1922 					      length,
   1923 					      DMA_FROM_DEVICE);
   1924 	if (dma_mapping_error(&rx->adapter->pdev->dev,
   1925 			      buffer_info->dma_ptr)) {
   1926 		buffer_info->dma_ptr = 0;
   1927 		return -ENOMEM;
   1928 	}
   1929 
   1930 	buffer_info->buffer_length = length;
   1931 	descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
   1932 	descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
   1933 	descriptor->data3 = 0;
   1934 	descriptor->data0 = (RX_DESC_DATA0_OWN_ |
   1935 			    (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
   1936 	skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
   1937 
   1938 	return 0;
   1939 }
   1940 
   1941 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
   1942 {
   1943 	struct lan743x_rx_buffer_info *buffer_info;
   1944 	struct lan743x_rx_descriptor *descriptor;
   1945 
   1946 	descriptor = &rx->ring_cpu_ptr[index];
   1947 	buffer_info = &rx->buffer_info[index];
   1948 
   1949 	descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
   1950 	descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
   1951 	descriptor->data3 = 0;
   1952 	descriptor->data0 = (RX_DESC_DATA0_OWN_ |
   1953 			    ((buffer_info->buffer_length) &
   1954 			    RX_DESC_DATA0_BUF_LENGTH_MASK_));
   1955 }
   1956 
   1957 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
   1958 {
   1959 	struct lan743x_rx_buffer_info *buffer_info;
   1960 	struct lan743x_rx_descriptor *descriptor;
   1961 
   1962 	descriptor = &rx->ring_cpu_ptr[index];
   1963 	buffer_info = &rx->buffer_info[index];
   1964 
   1965 	memset(descriptor, 0, sizeof(*descriptor));
   1966 
   1967 	if (buffer_info->dma_ptr) {
   1968 		dma_unmap_single(&rx->adapter->pdev->dev,
   1969 				 buffer_info->dma_ptr,
   1970 				 buffer_info->buffer_length,
   1971 				 DMA_FROM_DEVICE);
   1972 		buffer_info->dma_ptr = 0;
   1973 	}
   1974 
   1975 	if (buffer_info->skb) {
   1976 		dev_kfree_skb(buffer_info->skb);
   1977 		buffer_info->skb = NULL;
   1978 	}
   1979 
   1980 	memset(buffer_info, 0, sizeof(*buffer_info));
   1981 }
   1982 
   1983 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
   1984 {
   1985 	struct skb_shared_hwtstamps *hwtstamps = NULL;
   1986 	int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
   1987 	struct lan743x_rx_buffer_info *buffer_info;
   1988 	struct lan743x_rx_descriptor *descriptor;
   1989 	int current_head_index = -1;
   1990 	int extension_index = -1;
   1991 	int first_index = -1;
   1992 	int last_index = -1;
   1993 
   1994 	current_head_index = *rx->head_cpu_ptr;
   1995 	if (current_head_index < 0 || current_head_index >= rx->ring_size)
   1996 		goto done;
   1997 
   1998 	if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
   1999 		goto done;
   2000 
   2001 	if (rx->last_head != current_head_index) {
   2002 		descriptor = &rx->ring_cpu_ptr[rx->last_head];
   2003 		if (descriptor->data0 & RX_DESC_DATA0_OWN_)
   2004 			goto done;
   2005 
   2006 		if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
   2007 			goto done;
   2008 
   2009 		first_index = rx->last_head;
   2010 		if (descriptor->data0 & RX_DESC_DATA0_LS_) {
   2011 			last_index = rx->last_head;
   2012 		} else {
   2013 			int index;
   2014 
   2015 			index = lan743x_rx_next_index(rx, first_index);
   2016 			while (index != current_head_index) {
   2017 				descriptor = &rx->ring_cpu_ptr[index];
   2018 				if (descriptor->data0 & RX_DESC_DATA0_OWN_)
   2019 					goto done;
   2020 
   2021 				if (descriptor->data0 & RX_DESC_DATA0_LS_) {
   2022 					last_index = index;
   2023 					break;
   2024 				}
   2025 				index = lan743x_rx_next_index(rx, index);
   2026 			}
   2027 		}
   2028 		if (last_index >= 0) {
   2029 			descriptor = &rx->ring_cpu_ptr[last_index];
   2030 			if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
   2031 				/* extension is expected to follow */
   2032 				int index = lan743x_rx_next_index(rx,
   2033 								  last_index);
   2034 				if (index != current_head_index) {
   2035 					descriptor = &rx->ring_cpu_ptr[index];
   2036 					if (descriptor->data0 &
   2037 					    RX_DESC_DATA0_OWN_) {
   2038 						goto done;
   2039 					}
   2040 					if (descriptor->data0 &
   2041 					    RX_DESC_DATA0_EXT_) {
   2042 						extension_index = index;
   2043 					} else {
   2044 						goto done;
   2045 					}
   2046 				} else {
   2047 					/* extension is not yet available */
   2048 					/* prevent processing of this packet */
   2049 					first_index = -1;
   2050 					last_index = -1;
   2051 				}
   2052 			}
   2053 		}
   2054 	}
   2055 	if (first_index >= 0 && last_index >= 0) {
   2056 		int real_last_index = last_index;
   2057 		struct sk_buff *skb = NULL;
   2058 		u32 ts_sec = 0;
   2059 		u32 ts_nsec = 0;
   2060 
   2061 		/* packet is available */
   2062 		if (first_index == last_index) {
   2063 			/* single buffer packet */
   2064 			struct sk_buff *new_skb = NULL;
   2065 			int packet_length;
   2066 
   2067 			new_skb = lan743x_rx_allocate_skb(rx);
   2068 			if (!new_skb) {
   2069 				/* failed to allocate next skb.
   2070 				 * Memory is very low.
   2071 				 * Drop this packet and reuse buffer.
   2072 				 */
   2073 				lan743x_rx_reuse_ring_element(rx, first_index);
   2074 				goto process_extension;
   2075 			}
   2076 
   2077 			buffer_info = &rx->buffer_info[first_index];
   2078 			skb = buffer_info->skb;
   2079 			descriptor = &rx->ring_cpu_ptr[first_index];
   2080 
   2081 			/* unmap from dma */
   2082 			if (buffer_info->dma_ptr) {
   2083 				dma_unmap_single(&rx->adapter->pdev->dev,
   2084 						 buffer_info->dma_ptr,
   2085 						 buffer_info->buffer_length,
   2086 						 DMA_FROM_DEVICE);
   2087 				buffer_info->dma_ptr = 0;
   2088 				buffer_info->buffer_length = 0;
   2089 			}
   2090 			buffer_info->skb = NULL;
   2091 			packet_length =	RX_DESC_DATA0_FRAME_LENGTH_GET_
   2092 					(descriptor->data0);
   2093 			skb_put(skb, packet_length - 4);
   2094 			skb->protocol = eth_type_trans(skb,
   2095 						       rx->adapter->netdev);
   2096 			lan743x_rx_init_ring_element(rx, first_index, new_skb);
   2097 		} else {
   2098 			int index = first_index;
   2099 
   2100 			/* multi buffer packet not supported */
   2101 			/* this should not happen since
   2102 			 * buffers are allocated to be at least jumbo size
   2103 			 */
   2104 
   2105 			/* clean up buffers */
   2106 			if (first_index <= last_index) {
   2107 				while ((index >= first_index) &&
   2108 				       (index <= last_index)) {
   2109 					lan743x_rx_reuse_ring_element(rx,
   2110 								      index);
   2111 					index = lan743x_rx_next_index(rx,
   2112 								      index);
   2113 				}
   2114 			} else {
   2115 				while ((index >= first_index) ||
   2116 				       (index <= last_index)) {
   2117 					lan743x_rx_reuse_ring_element(rx,
   2118 								      index);
   2119 					index = lan743x_rx_next_index(rx,
   2120 								      index);
   2121 				}
   2122 			}
   2123 		}
   2124 
   2125 process_extension:
   2126 		if (extension_index >= 0) {
   2127 			descriptor = &rx->ring_cpu_ptr[extension_index];
   2128 			buffer_info = &rx->buffer_info[extension_index];
   2129 
   2130 			ts_sec = descriptor->data1;
   2131 			ts_nsec = (descriptor->data2 &
   2132 				  RX_DESC_DATA2_TS_NS_MASK_);
   2133 			lan743x_rx_reuse_ring_element(rx, extension_index);
   2134 			real_last_index = extension_index;
   2135 		}
   2136 
   2137 		if (!skb) {
   2138 			result = RX_PROCESS_RESULT_PACKET_DROPPED;
   2139 			goto move_forward;
   2140 		}
   2141 
   2142 		if (extension_index < 0)
   2143 			goto pass_packet_to_os;
   2144 		hwtstamps = skb_hwtstamps(skb);
   2145 		if (hwtstamps)
   2146 			hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
   2147 
   2148 pass_packet_to_os:
   2149 		/* pass packet to OS */
   2150 		napi_gro_receive(&rx->napi, skb);
   2151 		result = RX_PROCESS_RESULT_PACKET_RECEIVED;
   2152 
   2153 move_forward:
   2154 		/* push tail and head forward */
   2155 		rx->last_tail = real_last_index;
   2156 		rx->last_head = lan743x_rx_next_index(rx, real_last_index);
   2157 	}
   2158 done:
   2159 	return result;
   2160 }
   2161 
   2162 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
   2163 {
   2164 	struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
   2165 	struct lan743x_adapter *adapter = rx->adapter;
   2166 	u32 rx_tail_flags = 0;
   2167 	int count;
   2168 
   2169 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
   2170 		/* clear int status bit before reading packet */
   2171 		lan743x_csr_write(adapter, DMAC_INT_STS,
   2172 				  DMAC_INT_BIT_RXFRM_(rx->channel_number));
   2173 	}
   2174 	count = 0;
   2175 	while (count < weight) {
   2176 		int rx_process_result = -1;
   2177 
   2178 		rx_process_result = lan743x_rx_process_packet(rx);
   2179 		if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
   2180 			count++;
   2181 		} else if (rx_process_result ==
   2182 			RX_PROCESS_RESULT_NOTHING_TO_DO) {
   2183 			break;
   2184 		} else if (rx_process_result ==
   2185 			RX_PROCESS_RESULT_PACKET_DROPPED) {
   2186 			continue;
   2187 		}
   2188 	}
   2189 	rx->frame_count += count;
   2190 	if (count == weight)
   2191 		goto done;
   2192 
   2193 	if (!napi_complete_done(napi, count))
   2194 		goto done;
   2195 
   2196 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
   2197 		rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
   2198 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
   2199 		rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
   2200 	} else {
   2201 		lan743x_csr_write(adapter, INT_EN_SET,
   2202 				  INT_BIT_DMA_RX_(rx->channel_number));
   2203 	}
   2204 
   2205 	/* update RX_TAIL */
   2206 	lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
   2207 			  rx_tail_flags | rx->last_tail);
   2208 done:
   2209 	return count;
   2210 }
   2211 
   2212 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
   2213 {
   2214 	if (rx->buffer_info && rx->ring_cpu_ptr) {
   2215 		int index;
   2216 
   2217 		for (index = 0; index < rx->ring_size; index++)
   2218 			lan743x_rx_release_ring_element(rx, index);
   2219 	}
   2220 
   2221 	if (rx->head_cpu_ptr) {
   2222 		pci_free_consistent(rx->adapter->pdev,
   2223 				    sizeof(*rx->head_cpu_ptr),
   2224 				    rx->head_cpu_ptr,
   2225 				    rx->head_dma_ptr);
   2226 		rx->head_cpu_ptr = NULL;
   2227 		rx->head_dma_ptr = 0;
   2228 	}
   2229 
   2230 	kfree(rx->buffer_info);
   2231 	rx->buffer_info = NULL;
   2232 
   2233 	if (rx->ring_cpu_ptr) {
   2234 		pci_free_consistent(rx->adapter->pdev,
   2235 				    rx->ring_allocation_size,
   2236 				    rx->ring_cpu_ptr,
   2237 				    rx->ring_dma_ptr);
   2238 		rx->ring_allocation_size = 0;
   2239 		rx->ring_cpu_ptr = NULL;
   2240 		rx->ring_dma_ptr = 0;
   2241 	}
   2242 
   2243 	rx->ring_size = 0;
   2244 	rx->last_head = 0;
   2245 }
   2246 
   2247 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
   2248 {
   2249 	size_t ring_allocation_size = 0;
   2250 	dma_addr_t dma_ptr = 0;
   2251 	void *cpu_ptr = NULL;
   2252 	int ret = -ENOMEM;
   2253 	int index = 0;
   2254 
   2255 	rx->ring_size = LAN743X_RX_RING_SIZE;
   2256 	if (rx->ring_size <= 1) {
   2257 		ret = -EINVAL;
   2258 		goto cleanup;
   2259 	}
   2260 	if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
   2261 		ret = -EINVAL;
   2262 		goto cleanup;
   2263 	}
   2264 	ring_allocation_size = ALIGN(rx->ring_size *
   2265 				     sizeof(struct lan743x_rx_descriptor),
   2266 				     PAGE_SIZE);
   2267 	dma_ptr = 0;
   2268 	cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
   2269 					ring_allocation_size, &dma_ptr);
   2270 	if (!cpu_ptr) {
   2271 		ret = -ENOMEM;
   2272 		goto cleanup;
   2273 	}
   2274 	rx->ring_allocation_size = ring_allocation_size;
   2275 	rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
   2276 	rx->ring_dma_ptr = dma_ptr;
   2277 
   2278 	cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
   2279 			  GFP_KERNEL);
   2280 	if (!cpu_ptr) {
   2281 		ret = -ENOMEM;
   2282 		goto cleanup;
   2283 	}
   2284 	rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
   2285 	dma_ptr = 0;
   2286 	cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
   2287 					sizeof(*rx->head_cpu_ptr), &dma_ptr);
   2288 	if (!cpu_ptr) {
   2289 		ret = -ENOMEM;
   2290 		goto cleanup;
   2291 	}
   2292 
   2293 	rx->head_cpu_ptr = cpu_ptr;
   2294 	rx->head_dma_ptr = dma_ptr;
   2295 	if (rx->head_dma_ptr & 0x3) {
   2296 		ret = -ENOMEM;
   2297 		goto cleanup;
   2298 	}
   2299 
   2300 	rx->last_head = 0;
   2301 	for (index = 0; index < rx->ring_size; index++) {
   2302 		struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx);
   2303 
   2304 		ret = lan743x_rx_init_ring_element(rx, index, new_skb);
   2305 		if (ret)
   2306 			goto cleanup;
   2307 	}
   2308 	return 0;
   2309 
   2310 cleanup:
   2311 	lan743x_rx_ring_cleanup(rx);
   2312 	return ret;
   2313 }
   2314 
   2315 static void lan743x_rx_close(struct lan743x_rx *rx)
   2316 {
   2317 	struct lan743x_adapter *adapter = rx->adapter;
   2318 
   2319 	lan743x_csr_write(adapter, FCT_RX_CTL,
   2320 			  FCT_RX_CTL_DIS_(rx->channel_number));
   2321 	lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
   2322 				 FCT_RX_CTL_EN_(rx->channel_number),
   2323 				 0, 1000, 20000, 100);
   2324 
   2325 	lan743x_csr_write(adapter, DMAC_CMD,
   2326 			  DMAC_CMD_STOP_R_(rx->channel_number));
   2327 	lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
   2328 
   2329 	lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
   2330 			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
   2331 	lan743x_csr_write(adapter, INT_EN_CLR,
   2332 			  INT_BIT_DMA_RX_(rx->channel_number));
   2333 	napi_disable(&rx->napi);
   2334 
   2335 	netif_napi_del(&rx->napi);
   2336 
   2337 	lan743x_rx_ring_cleanup(rx);
   2338 }
   2339 
   2340 static int lan743x_rx_open(struct lan743x_rx *rx)
   2341 {
   2342 	struct lan743x_adapter *adapter = rx->adapter;
   2343 	u32 data = 0;
   2344 	int ret;
   2345 
   2346 	rx->frame_count = 0;
   2347 	ret = lan743x_rx_ring_init(rx);
   2348 	if (ret)
   2349 		goto return_error;
   2350 
   2351 	netif_napi_add(adapter->netdev,
   2352 		       &rx->napi, lan743x_rx_napi_poll,
   2353 		       rx->ring_size - 1);
   2354 
   2355 	lan743x_csr_write(adapter, DMAC_CMD,
   2356 			  DMAC_CMD_RX_SWR_(rx->channel_number));
   2357 	lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
   2358 				 DMAC_CMD_RX_SWR_(rx->channel_number),
   2359 				 0, 1000, 20000, 100);
   2360 
   2361 	/* set ring base address */
   2362 	lan743x_csr_write(adapter,
   2363 			  RX_BASE_ADDRH(rx->channel_number),
   2364 			  DMA_ADDR_HIGH32(rx->ring_dma_ptr));
   2365 	lan743x_csr_write(adapter,
   2366 			  RX_BASE_ADDRL(rx->channel_number),
   2367 			  DMA_ADDR_LOW32(rx->ring_dma_ptr));
   2368 
   2369 	/* set rx write back address */
   2370 	lan743x_csr_write(adapter,
   2371 			  RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
   2372 			  DMA_ADDR_HIGH32(rx->head_dma_ptr));
   2373 	lan743x_csr_write(adapter,
   2374 			  RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
   2375 			  DMA_ADDR_LOW32(rx->head_dma_ptr));
   2376 	data = RX_CFG_A_RX_HP_WB_EN_;
   2377 	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
   2378 		data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
   2379 			RX_CFG_A_RX_WB_THRES_SET_(0x7) |
   2380 			RX_CFG_A_RX_PF_THRES_SET_(16) |
   2381 			RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
   2382 	}
   2383 
   2384 	/* set RX_CFG_A */
   2385 	lan743x_csr_write(adapter,
   2386 			  RX_CFG_A(rx->channel_number), data);
   2387 
   2388 	/* set RX_CFG_B */
   2389 	data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
   2390 	data &= ~RX_CFG_B_RX_PAD_MASK_;
   2391 	if (!RX_HEAD_PADDING)
   2392 		data |= RX_CFG_B_RX_PAD_0_;
   2393 	else
   2394 		data |= RX_CFG_B_RX_PAD_2_;
   2395 	data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
   2396 	data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
   2397 	data |= RX_CFG_B_TS_ALL_RX_;
   2398 	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
   2399 		data |= RX_CFG_B_RDMABL_512_;
   2400 
   2401 	lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
   2402 	rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
   2403 							 INT_BIT_DMA_RX_
   2404 							 (rx->channel_number));
   2405 
   2406 	/* set RX_CFG_C */
   2407 	data = 0;
   2408 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
   2409 		data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
   2410 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
   2411 		data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
   2412 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
   2413 		data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
   2414 	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
   2415 		data |= RX_CFG_C_RX_INT_EN_R2C_;
   2416 	lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
   2417 
   2418 	rx->last_tail = ((u32)(rx->ring_size - 1));
   2419 	lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
   2420 			  rx->last_tail);
   2421 	rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
   2422 	if (rx->last_head) {
   2423 		ret = -EIO;
   2424 		goto napi_delete;
   2425 	}
   2426 
   2427 	napi_enable(&rx->napi);
   2428 
   2429 	lan743x_csr_write(adapter, INT_EN_SET,
   2430 			  INT_BIT_DMA_RX_(rx->channel_number));
   2431 	lan743x_csr_write(adapter, DMAC_INT_STS,
   2432 			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
   2433 	lan743x_csr_write(adapter, DMAC_INT_EN_SET,
   2434 			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
   2435 	lan743x_csr_write(adapter, DMAC_CMD,
   2436 			  DMAC_CMD_START_R_(rx->channel_number));
   2437 
   2438 	/* initialize fifo */
   2439 	lan743x_csr_write(adapter, FCT_RX_CTL,
   2440 			  FCT_RX_CTL_RESET_(rx->channel_number));
   2441 	lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
   2442 				 FCT_RX_CTL_RESET_(rx->channel_number),
   2443 				 0, 1000, 20000, 100);
   2444 	lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
   2445 			  FCT_FLOW_CTL_REQ_EN_ |
   2446 			  FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
   2447 			  FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
   2448 
   2449 	/* enable fifo */
   2450 	lan743x_csr_write(adapter, FCT_RX_CTL,
   2451 			  FCT_RX_CTL_EN_(rx->channel_number));
   2452 	return 0;
   2453 
   2454 napi_delete:
   2455 	netif_napi_del(&rx->napi);
   2456 	lan743x_rx_ring_cleanup(rx);
   2457 
   2458 return_error:
   2459 	return ret;
   2460 }
   2461 
   2462 static int lan743x_netdev_close(struct net_device *netdev)
   2463 {
   2464 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2465 	int index;
   2466 
   2467 	lan743x_tx_close(&adapter->tx[0]);
   2468 
   2469 	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
   2470 		lan743x_rx_close(&adapter->rx[index]);
   2471 
   2472 	lan743x_ptp_close(adapter);
   2473 
   2474 	lan743x_phy_close(adapter);
   2475 
   2476 	lan743x_mac_close(adapter);
   2477 
   2478 	lan743x_intr_close(adapter);
   2479 
   2480 	return 0;
   2481 }
   2482 
   2483 static int lan743x_netdev_open(struct net_device *netdev)
   2484 {
   2485 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2486 	int index;
   2487 	int ret;
   2488 
   2489 	ret = lan743x_intr_open(adapter);
   2490 	if (ret)
   2491 		goto return_error;
   2492 
   2493 	ret = lan743x_mac_open(adapter);
   2494 	if (ret)
   2495 		goto close_intr;
   2496 
   2497 	ret = lan743x_phy_open(adapter);
   2498 	if (ret)
   2499 		goto close_mac;
   2500 
   2501 	ret = lan743x_ptp_open(adapter);
   2502 	if (ret)
   2503 		goto close_phy;
   2504 
   2505 	lan743x_rfe_open(adapter);
   2506 
   2507 	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
   2508 		ret = lan743x_rx_open(&adapter->rx[index]);
   2509 		if (ret)
   2510 			goto close_rx;
   2511 	}
   2512 
   2513 	ret = lan743x_tx_open(&adapter->tx[0]);
   2514 	if (ret)
   2515 		goto close_rx;
   2516 
   2517 	return 0;
   2518 
   2519 close_rx:
   2520 	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
   2521 		if (adapter->rx[index].ring_cpu_ptr)
   2522 			lan743x_rx_close(&adapter->rx[index]);
   2523 	}
   2524 	lan743x_ptp_close(adapter);
   2525 
   2526 close_phy:
   2527 	lan743x_phy_close(adapter);
   2528 
   2529 close_mac:
   2530 	lan743x_mac_close(adapter);
   2531 
   2532 close_intr:
   2533 	lan743x_intr_close(adapter);
   2534 
   2535 return_error:
   2536 	netif_warn(adapter, ifup, adapter->netdev,
   2537 		   "Error opening LAN743x\n");
   2538 	return ret;
   2539 }
   2540 
   2541 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
   2542 					     struct net_device *netdev)
   2543 {
   2544 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2545 
   2546 	return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
   2547 }
   2548 
   2549 static int lan743x_netdev_ioctl(struct net_device *netdev,
   2550 				struct ifreq *ifr, int cmd)
   2551 {
   2552 	if (!netif_running(netdev))
   2553 		return -EINVAL;
   2554 	if (cmd == SIOCSHWTSTAMP)
   2555 		return lan743x_ptp_ioctl(netdev, ifr, cmd);
   2556 	return phy_mii_ioctl(netdev->phydev, ifr, cmd);
   2557 }
   2558 
   2559 static void lan743x_netdev_set_multicast(struct net_device *netdev)
   2560 {
   2561 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2562 
   2563 	lan743x_rfe_set_multicast(adapter);
   2564 }
   2565 
   2566 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
   2567 {
   2568 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2569 	int ret = 0;
   2570 
   2571 	ret = lan743x_mac_set_mtu(adapter, new_mtu);
   2572 	if (!ret)
   2573 		netdev->mtu = new_mtu;
   2574 	return ret;
   2575 }
   2576 
   2577 static void lan743x_netdev_get_stats64(struct net_device *netdev,
   2578 				       struct rtnl_link_stats64 *stats)
   2579 {
   2580 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2581 
   2582 	stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
   2583 	stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
   2584 	stats->rx_bytes = lan743x_csr_read(adapter,
   2585 					   STAT_RX_UNICAST_BYTE_COUNT) +
   2586 			  lan743x_csr_read(adapter,
   2587 					   STAT_RX_BROADCAST_BYTE_COUNT) +
   2588 			  lan743x_csr_read(adapter,
   2589 					   STAT_RX_MULTICAST_BYTE_COUNT);
   2590 	stats->tx_bytes = lan743x_csr_read(adapter,
   2591 					   STAT_TX_UNICAST_BYTE_COUNT) +
   2592 			  lan743x_csr_read(adapter,
   2593 					   STAT_TX_BROADCAST_BYTE_COUNT) +
   2594 			  lan743x_csr_read(adapter,
   2595 					   STAT_TX_MULTICAST_BYTE_COUNT);
   2596 	stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
   2597 			   lan743x_csr_read(adapter,
   2598 					    STAT_RX_ALIGNMENT_ERRORS) +
   2599 			   lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
   2600 			   lan743x_csr_read(adapter,
   2601 					    STAT_RX_UNDERSIZE_FRAME_ERRORS) +
   2602 			   lan743x_csr_read(adapter,
   2603 					    STAT_RX_OVERSIZE_FRAME_ERRORS);
   2604 	stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
   2605 			   lan743x_csr_read(adapter,
   2606 					    STAT_TX_EXCESS_DEFERRAL_ERRORS) +
   2607 			   lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
   2608 	stats->rx_dropped = lan743x_csr_read(adapter,
   2609 					     STAT_RX_DROPPED_FRAMES);
   2610 	stats->tx_dropped = lan743x_csr_read(adapter,
   2611 					     STAT_TX_EXCESSIVE_COLLISION);
   2612 	stats->multicast = lan743x_csr_read(adapter,
   2613 					    STAT_RX_MULTICAST_FRAMES) +
   2614 			   lan743x_csr_read(adapter,
   2615 					    STAT_TX_MULTICAST_FRAMES);
   2616 	stats->collisions = lan743x_csr_read(adapter,
   2617 					     STAT_TX_SINGLE_COLLISIONS) +
   2618 			    lan743x_csr_read(adapter,
   2619 					     STAT_TX_MULTIPLE_COLLISIONS) +
   2620 			    lan743x_csr_read(adapter,
   2621 					     STAT_TX_LATE_COLLISIONS);
   2622 }
   2623 
   2624 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
   2625 					  void *addr)
   2626 {
   2627 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2628 	struct sockaddr *sock_addr = addr;
   2629 	int ret;
   2630 
   2631 	ret = eth_prepare_mac_addr_change(netdev, sock_addr);
   2632 	if (ret)
   2633 		return ret;
   2634 	ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
   2635 	lan743x_mac_set_address(adapter, sock_addr->sa_data);
   2636 	lan743x_rfe_update_mac_address(adapter);
   2637 	return 0;
   2638 }
   2639 
   2640 static const struct net_device_ops lan743x_netdev_ops = {
   2641 	.ndo_open		= lan743x_netdev_open,
   2642 	.ndo_stop		= lan743x_netdev_close,
   2643 	.ndo_start_xmit		= lan743x_netdev_xmit_frame,
   2644 	.ndo_do_ioctl		= lan743x_netdev_ioctl,
   2645 	.ndo_set_rx_mode	= lan743x_netdev_set_multicast,
   2646 	.ndo_change_mtu		= lan743x_netdev_change_mtu,
   2647 	.ndo_get_stats64	= lan743x_netdev_get_stats64,
   2648 	.ndo_set_mac_address	= lan743x_netdev_set_mac_address,
   2649 };
   2650 
   2651 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
   2652 {
   2653 	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
   2654 }
   2655 
   2656 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
   2657 {
   2658 	mdiobus_unregister(adapter->mdiobus);
   2659 }
   2660 
   2661 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
   2662 {
   2663 	unregister_netdev(adapter->netdev);
   2664 
   2665 	lan743x_mdiobus_cleanup(adapter);
   2666 	lan743x_hardware_cleanup(adapter);
   2667 	lan743x_pci_cleanup(adapter);
   2668 }
   2669 
   2670 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
   2671 				 struct pci_dev *pdev)
   2672 {
   2673 	struct lan743x_tx *tx;
   2674 	int index;
   2675 	int ret;
   2676 
   2677 	adapter->intr.irq = adapter->pdev->irq;
   2678 	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
   2679 	mutex_init(&adapter->dp_lock);
   2680 
   2681 	ret = lan743x_gpio_init(adapter);
   2682 	if (ret)
   2683 		return ret;
   2684 
   2685 	ret = lan743x_mac_init(adapter);
   2686 	if (ret)
   2687 		return ret;
   2688 
   2689 	ret = lan743x_phy_init(adapter);
   2690 	if (ret)
   2691 		return ret;
   2692 
   2693 	ret = lan743x_ptp_init(adapter);
   2694 	if (ret)
   2695 		return ret;
   2696 
   2697 	lan743x_rfe_update_mac_address(adapter);
   2698 
   2699 	ret = lan743x_dmac_init(adapter);
   2700 	if (ret)
   2701 		return ret;
   2702 
   2703 	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
   2704 		adapter->rx[index].adapter = adapter;
   2705 		adapter->rx[index].channel_number = index;
   2706 	}
   2707 
   2708 	tx = &adapter->tx[0];
   2709 	tx->adapter = adapter;
   2710 	tx->channel_number = 0;
   2711 	spin_lock_init(&tx->ring_lock);
   2712 	return 0;
   2713 }
   2714 
   2715 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
   2716 {
   2717 	int ret;
   2718 
   2719 	adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
   2720 	if (!(adapter->mdiobus)) {
   2721 		ret = -ENOMEM;
   2722 		goto return_error;
   2723 	}
   2724 
   2725 	adapter->mdiobus->priv = (void *)adapter;
   2726 	adapter->mdiobus->read = lan743x_mdiobus_read;
   2727 	adapter->mdiobus->write = lan743x_mdiobus_write;
   2728 	adapter->mdiobus->name = "lan743x-mdiobus";
   2729 	snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
   2730 		 "pci-%s", pci_name(adapter->pdev));
   2731 
   2732 	if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
   2733 		/* LAN7430 uses internal phy at address 1 */
   2734 		adapter->mdiobus->phy_mask = ~(u32)BIT(1);
   2735 
   2736 	/* register mdiobus */
   2737 	ret = mdiobus_register(adapter->mdiobus);
   2738 	if (ret < 0)
   2739 		goto return_error;
   2740 	return 0;
   2741 
   2742 return_error:
   2743 	return ret;
   2744 }
   2745 
   2746 /* lan743x_pcidev_probe - Device Initialization Routine
   2747  * @pdev: PCI device information struct
   2748  * @id: entry in lan743x_pci_tbl
   2749  *
   2750  * Returns 0 on success, negative on failure
   2751  *
   2752  * initializes an adapter identified by a pci_dev structure.
   2753  * The OS initialization, configuring of the adapter private structure,
   2754  * and a hardware reset occur.
   2755  **/
   2756 static int lan743x_pcidev_probe(struct pci_dev *pdev,
   2757 				const struct pci_device_id *id)
   2758 {
   2759 	struct lan743x_adapter *adapter = NULL;
   2760 	struct net_device *netdev = NULL;
   2761 	int ret = -ENODEV;
   2762 
   2763 	netdev = devm_alloc_etherdev(&pdev->dev,
   2764 				     sizeof(struct lan743x_adapter));
   2765 	if (!netdev)
   2766 		goto return_error;
   2767 
   2768 	SET_NETDEV_DEV(netdev, &pdev->dev);
   2769 	pci_set_drvdata(pdev, netdev);
   2770 	adapter = netdev_priv(netdev);
   2771 	adapter->netdev = netdev;
   2772 	adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
   2773 			      NETIF_MSG_LINK | NETIF_MSG_IFUP |
   2774 			      NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
   2775 	netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
   2776 
   2777 	ret = lan743x_pci_init(adapter, pdev);
   2778 	if (ret)
   2779 		goto return_error;
   2780 
   2781 	ret = lan743x_csr_init(adapter);
   2782 	if (ret)
   2783 		goto cleanup_pci;
   2784 
   2785 	ret = lan743x_hardware_init(adapter, pdev);
   2786 	if (ret)
   2787 		goto cleanup_pci;
   2788 
   2789 	ret = lan743x_mdiobus_init(adapter);
   2790 	if (ret)
   2791 		goto cleanup_hardware;
   2792 
   2793 	adapter->netdev->netdev_ops = &lan743x_netdev_ops;
   2794 	adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
   2795 	adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
   2796 	adapter->netdev->hw_features = adapter->netdev->features;
   2797 
   2798 	/* carrier off reporting is important to ethtool even BEFORE open */
   2799 	netif_carrier_off(netdev);
   2800 
   2801 	ret = register_netdev(adapter->netdev);
   2802 	if (ret < 0)
   2803 		goto cleanup_mdiobus;
   2804 	return 0;
   2805 
   2806 cleanup_mdiobus:
   2807 	lan743x_mdiobus_cleanup(adapter);
   2808 
   2809 cleanup_hardware:
   2810 	lan743x_hardware_cleanup(adapter);
   2811 
   2812 cleanup_pci:
   2813 	lan743x_pci_cleanup(adapter);
   2814 
   2815 return_error:
   2816 	pr_warn("Initialization failed\n");
   2817 	return ret;
   2818 }
   2819 
   2820 /**
   2821  * lan743x_pcidev_remove - Device Removal Routine
   2822  * @pdev: PCI device information struct
   2823  *
   2824  * this is called by the PCI subsystem to alert the driver
   2825  * that it should release a PCI device.  This could be caused by a
   2826  * Hot-Plug event, or because the driver is going to be removed from
   2827  * memory.
   2828  **/
   2829 static void lan743x_pcidev_remove(struct pci_dev *pdev)
   2830 {
   2831 	struct net_device *netdev = pci_get_drvdata(pdev);
   2832 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2833 
   2834 	lan743x_full_cleanup(adapter);
   2835 }
   2836 
   2837 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
   2838 {
   2839 	struct net_device *netdev = pci_get_drvdata(pdev);
   2840 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2841 
   2842 	rtnl_lock();
   2843 	netif_device_detach(netdev);
   2844 
   2845 	/* close netdev when netdev is at running state.
   2846 	 * For instance, it is true when system goes to sleep by pm-suspend
   2847 	 * However, it is false when system goes to sleep by suspend GUI menu
   2848 	 */
   2849 	if (netif_running(netdev))
   2850 		lan743x_netdev_close(netdev);
   2851 	rtnl_unlock();
   2852 
   2853 #ifdef CONFIG_PM
   2854 	pci_save_state(pdev);
   2855 #endif
   2856 
   2857 	/* clean up lan743x portion */
   2858 	lan743x_hardware_cleanup(adapter);
   2859 }
   2860 
   2861 #ifdef CONFIG_PM_SLEEP
   2862 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
   2863 {
   2864 	return bitrev16(crc16(0xFFFF, buf, len));
   2865 }
   2866 
   2867 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
   2868 {
   2869 	const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
   2870 	const u8 ipv6_multicast[3] = { 0x33, 0x33 };
   2871 	const u8 arp_type[2] = { 0x08, 0x06 };
   2872 	int mask_index;
   2873 	u32 pmtctl;
   2874 	u32 wucsr;
   2875 	u32 macrx;
   2876 	u16 crc;
   2877 
   2878 	for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
   2879 		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
   2880 
   2881 	/* clear wake settings */
   2882 	pmtctl = lan743x_csr_read(adapter, PMT_CTL);
   2883 	pmtctl |= PMT_CTL_WUPS_MASK_;
   2884 	pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
   2885 		PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
   2886 		PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
   2887 
   2888 	macrx = lan743x_csr_read(adapter, MAC_RX);
   2889 
   2890 	wucsr = 0;
   2891 	mask_index = 0;
   2892 
   2893 	pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
   2894 
   2895 	if (adapter->wolopts & WAKE_PHY) {
   2896 		pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
   2897 		pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
   2898 	}
   2899 	if (adapter->wolopts & WAKE_MAGIC) {
   2900 		wucsr |= MAC_WUCSR_MPEN_;
   2901 		macrx |= MAC_RX_RXEN_;
   2902 		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
   2903 	}
   2904 	if (adapter->wolopts & WAKE_UCAST) {
   2905 		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
   2906 		macrx |= MAC_RX_RXEN_;
   2907 		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
   2908 		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
   2909 	}
   2910 	if (adapter->wolopts & WAKE_BCAST) {
   2911 		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
   2912 		macrx |= MAC_RX_RXEN_;
   2913 		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
   2914 		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
   2915 	}
   2916 	if (adapter->wolopts & WAKE_MCAST) {
   2917 		/* IPv4 multicast */
   2918 		crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
   2919 		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
   2920 				  MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
   2921 				  (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
   2922 				  (crc & MAC_WUF_CFG_CRC16_MASK_));
   2923 		lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
   2924 		lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
   2925 		lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
   2926 		lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
   2927 		mask_index++;
   2928 
   2929 		/* IPv6 multicast */
   2930 		crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
   2931 		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
   2932 				  MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
   2933 				  (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
   2934 				  (crc & MAC_WUF_CFG_CRC16_MASK_));
   2935 		lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
   2936 		lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
   2937 		lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
   2938 		lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
   2939 		mask_index++;
   2940 
   2941 		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
   2942 		macrx |= MAC_RX_RXEN_;
   2943 		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
   2944 		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
   2945 	}
   2946 	if (adapter->wolopts & WAKE_ARP) {
   2947 		/* set MAC_WUF_CFG & WUF_MASK
   2948 		 * for packettype (offset 12,13) = ARP (0x0806)
   2949 		 */
   2950 		crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
   2951 		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
   2952 				  MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
   2953 				  (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
   2954 				  (crc & MAC_WUF_CFG_CRC16_MASK_));
   2955 		lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
   2956 		lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
   2957 		lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
   2958 		lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
   2959 		mask_index++;
   2960 
   2961 		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
   2962 		macrx |= MAC_RX_RXEN_;
   2963 		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
   2964 		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
   2965 	}
   2966 
   2967 	lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
   2968 	lan743x_csr_write(adapter, PMT_CTL, pmtctl);
   2969 	lan743x_csr_write(adapter, MAC_RX, macrx);
   2970 }
   2971 
   2972 static int lan743x_pm_suspend(struct device *dev)
   2973 {
   2974 	struct pci_dev *pdev = to_pci_dev(dev);
   2975 	struct net_device *netdev = pci_get_drvdata(pdev);
   2976 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   2977 	int ret;
   2978 
   2979 	lan743x_pcidev_shutdown(pdev);
   2980 
   2981 	/* clear all wakes */
   2982 	lan743x_csr_write(adapter, MAC_WUCSR, 0);
   2983 	lan743x_csr_write(adapter, MAC_WUCSR2, 0);
   2984 	lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
   2985 
   2986 	if (adapter->wolopts)
   2987 		lan743x_pm_set_wol(adapter);
   2988 
   2989 	/* Host sets PME_En, put D3hot */
   2990 	ret = pci_prepare_to_sleep(pdev);
   2991 
   2992 	return 0;
   2993 }
   2994 
   2995 static int lan743x_pm_resume(struct device *dev)
   2996 {
   2997 	struct pci_dev *pdev = to_pci_dev(dev);
   2998 	struct net_device *netdev = pci_get_drvdata(pdev);
   2999 	struct lan743x_adapter *adapter = netdev_priv(netdev);
   3000 	int ret;
   3001 
   3002 	pci_set_power_state(pdev, PCI_D0);
   3003 	pci_restore_state(pdev);
   3004 	pci_save_state(pdev);
   3005 
   3006 	ret = lan743x_hardware_init(adapter, pdev);
   3007 	if (ret) {
   3008 		netif_err(adapter, probe, adapter->netdev,
   3009 			  "lan743x_hardware_init returned %d\n", ret);
   3010 	}
   3011 
   3012 	/* open netdev when netdev is at running state while resume.
   3013 	 * For instance, it is true when system wakesup after pm-suspend
   3014 	 * However, it is false when system wakes up after suspend GUI menu
   3015 	 */
   3016 	if (netif_running(netdev))
   3017 		lan743x_netdev_open(netdev);
   3018 
   3019 	netif_device_attach(netdev);
   3020 
   3021 	return 0;
   3022 }
   3023 
   3024 static const struct dev_pm_ops lan743x_pm_ops = {
   3025 	SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
   3026 };
   3027 #endif /* CONFIG_PM_SLEEP */
   3028 
   3029 static const struct pci_device_id lan743x_pcidev_tbl[] = {
   3030 	{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
   3031 	{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
   3032 	{ 0, }
   3033 };
   3034 
   3035 static struct pci_driver lan743x_pcidev_driver = {
   3036 	.name     = DRIVER_NAME,
   3037 	.id_table = lan743x_pcidev_tbl,
   3038 	.probe    = lan743x_pcidev_probe,
   3039 	.remove   = lan743x_pcidev_remove,
   3040 #ifdef CONFIG_PM_SLEEP
   3041 	.driver.pm = &lan743x_pm_ops,
   3042 #endif
   3043 	.shutdown = lan743x_pcidev_shutdown,
   3044 };
   3045 
   3046 module_pci_driver(lan743x_pcidev_driver);
   3047 
   3048 MODULE_AUTHOR(DRIVER_AUTHOR);
   3049 MODULE_DESCRIPTION(DRIVER_DESC);
   3050 MODULE_LICENSE("GPL");