drivers/net/ethernet/microchip/lan743x_main.c

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