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 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
  57 {
  58         return ioread32(&adapter->csr.csr_address[offset]);
  59 }
  60
  61 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset, u32 data)
  62 {
  63         iowrite32(data, &adapter->csr.csr_address[offset]);
  64 }
  65
  66 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
  67
  68 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
  69 {
  70         u32 data;
  71
  72         data = lan743x_csr_read(adapter, HW_CFG);
  73         data |= HW_CFG_LRST_;
  74         lan743x_csr_write(adapter, HW_CFG, data);
  75
  76         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
  77                                   !(data & HW_CFG_LRST_), 100000, 10000000);
  78 }
  79
  80 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
  81                                     int offset, u32 bit_mask,
  82                                     int target_value, int usleep_min,
  83                                     int usleep_max, int count)
  84 {
  85         u32 data;
  86
  87         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
  88                                   target_value == ((data & bit_mask) ? 1 : 0),
  89                                   usleep_max, usleep_min * count);
  90 }
  91
  92 static int lan743x_csr_init(struct lan743x_adapter *adapter)
  93 {
  94         struct lan743x_csr *csr = &adapter->csr;
  95         resource_size_t bar_start, bar_length;
  96         int result;
  97
  98         bar_start = pci_resource_start(adapter->pdev, 0);
  99         bar_length = pci_resource_len(adapter->pdev, 0);
 100         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 101                                         bar_start, bar_length);
 102         if (!csr->csr_address) {
 103                 result = -ENOMEM;
 104                 goto clean_up;
 105         }
 106
 107         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 108         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 109         netif_info(adapter, probe, adapter->netdev,
 110                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 111                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 112                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 113         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 114                 result = -ENODEV;
 115                 goto clean_up;
 116         }
 117
 118         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 119         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 120         case ID_REV_CHIP_REV_A0_:
 121                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 122                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 123                 break;
 124         case ID_REV_CHIP_REV_B0_:
 125                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 126                 break;
 127         }
 128
 129         result = lan743x_csr_light_reset(adapter);
 130         if (result)
 131                 goto clean_up;
 132         return 0;
 133 clean_up:
 134         return result;
 135 }
 136
 137 static void lan743x_intr_software_isr(void *context)
 138 {
 139         struct lan743x_adapter *adapter = context;
 140         struct lan743x_intr *intr = &adapter->intr;
 141         u32 int_sts;
 142
 143         int_sts = lan743x_csr_read(adapter, INT_STS);
 144         if (int_sts & INT_BIT_SW_GP_) {
 145                 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
 146                 intr->software_isr_flag = 1;
 147         }
 148 }
 149
 150 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 151 {
 152         struct lan743x_tx *tx = context;
 153         struct lan743x_adapter *adapter = tx->adapter;
 154         bool enable_flag = true;
 155         u32 int_en = 0;
 156
 157         int_en = lan743x_csr_read(adapter, INT_EN_SET);
 158         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 159                 lan743x_csr_write(adapter, INT_EN_CLR,
 160                                   INT_BIT_DMA_TX_(tx->channel_number));
 161         }
 162
 163         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 164                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 165                 u32 dmac_int_sts;
 166                 u32 dmac_int_en;
 167
 168                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 169                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 170                 else
 171                         dmac_int_sts = ioc_bit;
 172                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 173                         dmac_int_en = lan743x_csr_read(adapter,
 174                                                        DMAC_INT_EN_SET);
 175                 else
 176                         dmac_int_en = ioc_bit;
 177
 178                 dmac_int_en &= ioc_bit;
 179                 dmac_int_sts &= dmac_int_en;
 180                 if (dmac_int_sts & ioc_bit) {
 181                         napi_schedule(&tx->napi);
 182                         enable_flag = false;/* poll func will enable later */
 183                 }
 184         }
 185
 186         if (enable_flag)
 187                 /* enable isr */
 188                 lan743x_csr_write(adapter, INT_EN_SET,
 189                                   INT_BIT_DMA_TX_(tx->channel_number));
 190 }
 191
 192 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 193 {
 194         struct lan743x_rx *rx = context;
 195         struct lan743x_adapter *adapter = rx->adapter;
 196         bool enable_flag = true;
 197
 198         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 199                 lan743x_csr_write(adapter, INT_EN_CLR,
 200                                   INT_BIT_DMA_RX_(rx->channel_number));
 201         }
 202
 203         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 204                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 205                 u32 dmac_int_sts;
 206                 u32 dmac_int_en;
 207
 208                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 209                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 210                 else
 211                         dmac_int_sts = rx_frame_bit;
 212                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 213                         dmac_int_en = lan743x_csr_read(adapter,
 214                                                        DMAC_INT_EN_SET);
 215                 else
 216                         dmac_int_en = rx_frame_bit;
 217
 218                 dmac_int_en &= rx_frame_bit;
 219                 dmac_int_sts &= dmac_int_en;
 220                 if (dmac_int_sts & rx_frame_bit) {
 221                         napi_schedule(&rx->napi);
 222                         enable_flag = false;/* poll funct will enable later */
 223                 }
 224         }
 225
 226         if (enable_flag) {
 227                 /* enable isr */
 228                 lan743x_csr_write(adapter, INT_EN_SET,
 229                                   INT_BIT_DMA_RX_(rx->channel_number));
 230         }
 231 }
 232
 233 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 234 {
 235         struct lan743x_adapter *adapter = context;
 236         unsigned int channel;
 237
 238         if (int_sts & INT_BIT_ALL_RX_) {
 239                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 240                         channel++) {
 241                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 242
 243                         if (int_sts & int_bit) {
 244                                 lan743x_rx_isr(&adapter->rx[channel],
 245                                                int_bit, flags);
 246                                 int_sts &= ~int_bit;
 247                         }
 248                 }
 249         }
 250         if (int_sts & INT_BIT_ALL_TX_) {
 251                 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
 252                         channel++) {
 253                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 254
 255                         if (int_sts & int_bit) {
 256                                 lan743x_tx_isr(&adapter->tx[channel],
 257                                                int_bit, flags);
 258                                 int_sts &= ~int_bit;
 259                         }
 260                 }
 261         }
 262         if (int_sts & INT_BIT_ALL_OTHER_) {
 263                 if (int_sts & INT_BIT_SW_GP_) {
 264                         lan743x_intr_software_isr(adapter);
 265                         int_sts &= ~INT_BIT_SW_GP_;
 266                 }
 267         }
 268         if (int_sts)
 269                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 270 }
 271
 272 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 273 {
 274         struct lan743x_vector *vector = ptr;
 275         struct lan743x_adapter *adapter = vector->adapter;
 276         irqreturn_t result = IRQ_NONE;
 277         u32 int_enables;
 278         u32 int_sts;
 279
 280         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 281                 int_sts = lan743x_csr_read(adapter, INT_STS);
 282         } else if (vector->flags &
 283                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 284                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 285                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 286         } else {
 287                 /* use mask as implied status */
 288                 int_sts = vector->int_mask | INT_BIT_MAS_;
 289         }
 290
 291         if (!(int_sts & INT_BIT_MAS_))
 292                 goto irq_done;
 293
 294         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 295                 /* disable vector interrupt */
 296                 lan743x_csr_write(adapter,
 297                                   INT_VEC_EN_CLR,
 298                                   INT_VEC_EN_(vector->vector_index));
 299
 300         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 301                 /* disable master interrupt */
 302                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 303
 304         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 305                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 306         } else {
 307                 /*  use vector mask as implied enable mask */
 308                 int_enables = vector->int_mask;
 309         }
 310
 311         int_sts &= int_enables;
 312         int_sts &= vector->int_mask;
 313         if (int_sts) {
 314                 if (vector->handler) {
 315                         vector->handler(vector->context,
 316                                         int_sts, vector->flags);
 317                 } else {
 318                         /* disable interrupts on this vector */
 319                         lan743x_csr_write(adapter, INT_EN_CLR,
 320                                           vector->int_mask);
 321                 }
 322                 result = IRQ_HANDLED;
 323         }
 324
 325         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 326                 /* enable master interrupt */
 327                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 328
 329         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 330                 /* enable vector interrupt */
 331                 lan743x_csr_write(adapter,
 332                                   INT_VEC_EN_SET,
 333                                   INT_VEC_EN_(vector->vector_index));
 334 irq_done:
 335         return result;
 336 }
 337
 338 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 339 {
 340         struct lan743x_intr *intr = &adapter->intr;
 341         int result = -ENODEV;
 342         int timeout = 10;
 343
 344         intr->software_isr_flag = 0;
 345
 346         /* enable interrupt */
 347         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 348
 349         /* activate interrupt here */
 350         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 351         while ((timeout > 0) && (!(intr->software_isr_flag))) {
 352                 usleep_range(1000, 20000);
 353                 timeout--;
 354         }
 355
 356         if (intr->software_isr_flag)
 357                 result = 0;
 358
 359         /* disable interrupts */
 360         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 361         return result;
 362 }
 363
 364 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 365                                      int vector_index, u32 flags,
 366                                      u32 int_mask,
 367                                      lan743x_vector_handler handler,
 368                                      void *context)
 369 {
 370         struct lan743x_vector *vector = &adapter->intr.vector_list
 371                                         [vector_index];
 372         int ret;
 373
 374         vector->adapter = adapter;
 375         vector->flags = flags;
 376         vector->vector_index = vector_index;
 377         vector->int_mask = int_mask;
 378         vector->handler = handler;
 379         vector->context = context;
 380
 381         ret = request_irq(vector->irq,
 382                           lan743x_intr_entry_isr,
 383                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 384                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 385         if (ret) {
 386                 vector->handler = NULL;
 387                 vector->context = NULL;
 388                 vector->int_mask = 0;
 389                 vector->flags = 0;
 390         }
 391         return ret;
 392 }
 393
 394 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 395                                         int vector_index)
 396 {
 397         struct lan743x_vector *vector = &adapter->intr.vector_list
 398                                         [vector_index];
 399
 400         free_irq(vector->irq, vector);
 401         vector->handler = NULL;
 402         vector->context = NULL;
 403         vector->int_mask = 0;
 404         vector->flags = 0;
 405 }
 406
 407 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 408                                          u32 int_mask)
 409 {
 410         int index;
 411
 412         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 413                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 414                         return adapter->intr.vector_list[index].flags;
 415         }
 416         return 0;
 417 }
 418
 419 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 420 {
 421         struct lan743x_intr *intr = &adapter->intr;
 422         int index = 0;
 423
 424         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 425         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 426
 427         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 428                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 429                         lan743x_intr_unregister_isr(adapter, index);
 430                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 431                 }
 432         }
 433
 434         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 435                 pci_disable_msi(adapter->pdev);
 436                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 437         }
 438
 439         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 440                 pci_disable_msix(adapter->pdev);
 441                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 442         }
 443 }
 444
 445 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 446 {
 447         struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
 448         struct lan743x_intr *intr = &adapter->intr;
 449         u32 int_vec_en_auto_clr = 0;
 450         u32 int_vec_map0 = 0;
 451         u32 int_vec_map1 = 0;
 452         int ret = -ENODEV;
 453         int index = 0;
 454         u32 flags = 0;
 455
 456         intr->number_of_vectors = 0;
 457
 458         /* Try to set up MSIX interrupts */
 459         memset(&msix_entries[0], 0,
 460                sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
 461         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
 462                 msix_entries[index].entry = index;
 463         ret = pci_enable_msix_range(adapter->pdev,
 464                                     msix_entries, 1,
 465                                     1 + LAN743X_USED_TX_CHANNELS +
 466                                     LAN743X_USED_RX_CHANNELS);
 467
 468         if (ret > 0) {
 469                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 470                 intr->number_of_vectors = ret;
 471                 intr->using_vectors = true;
 472                 for (index = 0; index < intr->number_of_vectors; index++)
 473                         intr->vector_list[index].irq = msix_entries
 474                                                        [index].vector;
 475                 netif_info(adapter, ifup, adapter->netdev,
 476                            "using MSIX interrupts, number of vectors = %d\n",
 477                            intr->number_of_vectors);
 478         }
 479
 480         /* If MSIX failed try to setup using MSI interrupts */
 481         if (!intr->number_of_vectors) {
 482                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 483                         if (!pci_enable_msi(adapter->pdev)) {
 484                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 485                                 intr->number_of_vectors = 1;
 486                                 intr->using_vectors = true;
 487                                 intr->vector_list[0].irq =
 488                                         adapter->pdev->irq;
 489                                 netif_info(adapter, ifup, adapter->netdev,
 490                                            "using MSI interrupts, number of vectors = %d\n",
 491                                            intr->number_of_vectors);
 492                         }
 493                 }
 494         }
 495
 496         /* If MSIX, and MSI failed, setup using legacy interrupt */
 497         if (!intr->number_of_vectors) {
 498                 intr->number_of_vectors = 1;
 499                 intr->using_vectors = false;
 500                 intr->vector_list[0].irq = intr->irq;
 501                 netif_info(adapter, ifup, adapter->netdev,
 502                            "using legacy interrupts\n");
 503         }
 504
 505         /* At this point we must have at least one irq */
 506         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 507
 508         /* map all interrupts to vector 0 */
 509         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 510         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 511         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 512         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 513                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 514                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 515                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 516
 517         if (intr->using_vectors) {
 518                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 519                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 520         } else {
 521                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 522                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 523                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 524         }
 525
 526         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 527                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 528                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 529                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 530                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 531                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 532                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 533         }
 534
 535         ret = lan743x_intr_register_isr(adapter, 0, flags,
 536                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 537                                         INT_BIT_ALL_OTHER_,
 538                                         lan743x_intr_shared_isr, adapter);
 539         if (ret)
 540                 goto clean_up;
 541         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 542
 543         if (intr->using_vectors)
 544                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 545                                   INT_VEC_EN_(0));
 546
 547         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 548                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 549                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 550                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 551                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 552                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 553                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 554                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 555                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 556                 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 557                 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 558                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 559         }
 560
 561         /* enable interrupts */
 562         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 563         ret = lan743x_intr_test_isr(adapter);
 564         if (ret)
 565                 goto clean_up;
 566
 567         if (intr->number_of_vectors > 1) {
 568                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 569
 570                 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
 571                         number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
 572                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 573                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 574                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 575                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 576                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 577                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 578
 579                 if (adapter->csr.flags &
 580                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 581                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 582                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 583                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 584                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 585                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 586                 }
 587
 588                 for (index = 0; index < number_of_tx_vectors; index++) {
 589                         u32 int_bit = INT_BIT_DMA_TX_(index);
 590                         int vector = index + 1;
 591
 592                         /* map TX interrupt to vector */
 593                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 594                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 595                         if (flags &
 596                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 597                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 598                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 599                                                   int_vec_en_auto_clr);
 600                         }
 601
 602                         /* Remove TX interrupt from shared mask */
 603                         intr->vector_list[0].int_mask &= ~int_bit;
 604                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 605                                                         int_bit, lan743x_tx_isr,
 606                                                         &adapter->tx[index]);
 607                         if (ret)
 608                                 goto clean_up;
 609                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 610                         if (!(flags &
 611                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 612                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 613                                                   INT_VEC_EN_(vector));
 614                 }
 615         }
 616         if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
 617                 int number_of_rx_vectors = intr->number_of_vectors -
 618                                            LAN743X_USED_TX_CHANNELS - 1;
 619
 620                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 621                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 622
 623                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 624                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 625                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 626                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 627                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 628                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 629
 630                 if (adapter->csr.flags &
 631                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 632                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 633                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 634                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 635                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 636                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 637                 }
 638                 for (index = 0; index < number_of_rx_vectors; index++) {
 639                         int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
 640                         u32 int_bit = INT_BIT_DMA_RX_(index);
 641
 642                         /* map RX interrupt to vector */
 643                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 644                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 645                         if (flags &
 646                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 647                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 648                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 649                                                   int_vec_en_auto_clr);
 650                         }
 651
 652                         /* Remove RX interrupt from shared mask */
 653                         intr->vector_list[0].int_mask &= ~int_bit;
 654                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 655                                                         int_bit, lan743x_rx_isr,
 656                                                         &adapter->rx[index]);
 657                         if (ret)
 658                                 goto clean_up;
 659                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 660
 661                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 662                                           INT_VEC_EN_(vector));
 663                 }
 664         }
 665         return 0;
 666
 667 clean_up:
 668         lan743x_intr_close(adapter);
 669         return ret;
 670 }
 671
 672 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 673                             u32 select, u32 addr, u32 length, u32 *buf)
 674 {
 675         int ret = -EIO;
 676         u32 dp_sel;
 677         int i;
 678
 679         mutex_lock(&adapter->dp_lock);
 680         if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 681                                      1, 40, 100, 100))
 682                 goto unlock;
 683         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 684         dp_sel &= ~DP_SEL_MASK_;
 685         dp_sel |= select;
 686         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 687
 688         for (i = 0; i < length; i++) {
 689                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 690                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 691                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 692                 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 693                                              1, 40, 100, 100))
 694                         goto unlock;
 695         }
 696         ret = 0;
 697
 698 unlock:
 699         mutex_unlock(&adapter->dp_lock);
 700         return ret;
 701 }
 702
 703 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 704 {
 705         u32 ret;
 706
 707         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 708                 MAC_MII_ACC_PHY_ADDR_MASK_;
 709         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 710                 MAC_MII_ACC_MIIRINDA_MASK_;
 711
 712         if (read)
 713                 ret |= MAC_MII_ACC_MII_READ_;
 714         else
 715                 ret |= MAC_MII_ACC_MII_WRITE_;
 716         ret |= MAC_MII_ACC_MII_BUSY_;
 717
 718         return ret;
 719 }
 720
 721 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 722 {
 723         u32 data;
 724
 725         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 726                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 727 }
 728
 729 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 730 {
 731         struct lan743x_adapter *adapter = bus->priv;
 732         u32 val, mii_access;
 733         int ret;
 734
 735         /* comfirm MII not busy */
 736         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 737         if (ret < 0)
 738                 return ret;
 739
 740         /* set the address, index & direction (read from PHY) */
 741         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 742         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 743         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 744         if (ret < 0)
 745                 return ret;
 746
 747         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 748         return (int)(val & 0xFFFF);
 749 }
 750
 751 static int lan743x_mdiobus_write(struct mii_bus *bus,
 752                                  int phy_id, int index, u16 regval)
 753 {
 754         struct lan743x_adapter *adapter = bus->priv;
 755         u32 val, mii_access;
 756         int ret;
 757
 758         /* confirm MII not busy */
 759         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 760         if (ret < 0)
 761                 return ret;
 762         val = (u32)regval;
 763         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 764
 765         /* set the address, index & direction (write to PHY) */
 766         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 767         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 768         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 769         return ret;
 770 }
 771
 772 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 773                                     u8 *addr)
 774 {
 775         u32 addr_lo, addr_hi;
 776
 777         addr_lo = addr[0] |
 778                 addr[1] << 8 |
 779                 addr[2] << 16 |
 780                 addr[3] << 24;
 781         addr_hi = addr[4] |
 782                 addr[5] << 8;
 783         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 784         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 785
 786         ether_addr_copy(adapter->mac_address, addr);
 787         netif_info(adapter, drv, adapter->netdev,
 788                    "MAC address set to %pM\n", addr);
 789 }
 790
 791 static int lan743x_mac_init(struct lan743x_adapter *adapter)
 792 {
 793         bool mac_address_valid = true;
 794         struct net_device *netdev;
 795         u32 mac_addr_hi = 0;
 796         u32 mac_addr_lo = 0;
 797         u32 data;
 798         int ret;
 799
 800         netdev = adapter->netdev;
 801         lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
 802         ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
 803                                        0, 1000, 20000, 100);
 804         if (ret)
 805                 return ret;
 806
 807         /* setup auto duplex, and speed detection */
 808         data = lan743x_csr_read(adapter, MAC_CR);
 809         data |= MAC_CR_ADD_ | MAC_CR_ASD_;
 810         data |= MAC_CR_CNTR_RST_;
 811         lan743x_csr_write(adapter, MAC_CR, data);
 812
 813         mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 814         mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 815         adapter->mac_address[0] = mac_addr_lo & 0xFF;
 816         adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 817         adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 818         adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 819         adapter->mac_address[4] = mac_addr_hi & 0xFF;
 820         adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 821
 822         if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 823             mac_addr_lo == 0xFFFFFFFF) {
 824                 mac_address_valid = false;
 825         } else if (!is_valid_ether_addr(adapter->mac_address)) {
 826                 mac_address_valid = false;
 827         }
 828
 829         if (!mac_address_valid)
 830                 random_ether_addr(adapter->mac_address);
 831         lan743x_mac_set_address(adapter, adapter->mac_address);
 832         ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 833         return 0;
 834 }
 835
 836 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 837 {
 838         int ret = 0;
 839         u32 temp;
 840
 841         temp = lan743x_csr_read(adapter, MAC_RX);
 842         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 843         temp = lan743x_csr_read(adapter, MAC_TX);
 844         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 845         return ret;
 846 }
 847
 848 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 849 {
 850         u32 temp;
 851
 852         temp = lan743x_csr_read(adapter, MAC_TX);
 853         temp &= ~MAC_TX_TXEN_;
 854         lan743x_csr_write(adapter, MAC_TX, temp);
 855         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 856                                  1, 1000, 20000, 100);
 857
 858         temp = lan743x_csr_read(adapter, MAC_RX);
 859         temp &= ~MAC_RX_RXEN_;
 860         lan743x_csr_write(adapter, MAC_RX, temp);
 861         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 862                                  1, 1000, 20000, 100);
 863 }
 864
 865 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 866                                               bool tx_enable, bool rx_enable)
 867 {
 868         u32 flow_setting = 0;
 869
 870         /* set maximum pause time because when fifo space frees
 871          * up a zero value pause frame will be sent to release the pause
 872          */
 873         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 874         if (tx_enable)
 875                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 876         if (rx_enable)
 877                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 878         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 879 }
 880
 881 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 882 {
 883         int enabled = 0;
 884         u32 mac_rx = 0;
 885
 886         mac_rx = lan743x_csr_read(adapter, MAC_RX);
 887         if (mac_rx & MAC_RX_RXEN_) {
 888                 enabled = 1;
 889                 if (mac_rx & MAC_RX_RXD_) {
 890                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 891                         mac_rx &= ~MAC_RX_RXD_;
 892                 }
 893                 mac_rx &= ~MAC_RX_RXEN_;
 894                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 895                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 896                                          1, 1000, 20000, 100);
 897                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 898         }
 899
 900         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 901         mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
 902                   MAC_RX_MAX_SIZE_MASK_);
 903         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 904
 905         if (enabled) {
 906                 mac_rx |= MAC_RX_RXEN_;
 907                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 908         }
 909         return 0;
 910 }
 911
 912 /* PHY */
 913 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 914 {
 915         u32 data;
 916
 917         /* Only called with in probe, and before mdiobus_register */
 918
 919         data = lan743x_csr_read(adapter, PMT_CTL);
 920         data |= PMT_CTL_ETH_PHY_RST_;
 921         lan743x_csr_write(adapter, PMT_CTL, data);
 922
 923         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 924                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
 925                                   (data & PMT_CTL_READY_)),
 926                                   50000, 1000000);
 927 }
 928
 929 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 930                                            u8 duplex, u16 local_adv,
 931                                            u16 remote_adv)
 932 {
 933         struct lan743x_phy *phy = &adapter->phy;
 934         u8 cap;
 935
 936         if (phy->fc_autoneg)
 937                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 938         else
 939                 cap = phy->fc_request_control;
 940
 941         lan743x_mac_flow_ctrl_set_enables(adapter,
 942                                           cap & FLOW_CTRL_TX,
 943                                           cap & FLOW_CTRL_RX);
 944 }
 945
 946 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 947 {
 948         struct net_device *netdev;
 949         int ret;
 950
 951         netdev = adapter->netdev;
 952         ret = lan743x_phy_reset(adapter);
 953         if (ret)
 954                 return ret;
 955
 956         return 0;
 957 }
 958
 959 static void lan743x_phy_link_status_change(struct net_device *netdev)
 960 {
 961         struct lan743x_adapter *adapter = netdev_priv(netdev);
 962         struct phy_device *phydev = netdev->phydev;
 963
 964         phy_print_status(phydev);
 965         if (phydev->state == PHY_RUNNING) {
 966                 struct ethtool_link_ksettings ksettings;
 967                 struct lan743x_phy *phy = NULL;
 968                 int remote_advertisement = 0;
 969                 int local_advertisement = 0;
 970
 971                 phy = &adapter->phy;
 972                 memset(&ksettings, 0, sizeof(ksettings));
 973                 phy_ethtool_get_link_ksettings(netdev, &ksettings);
 974                 local_advertisement = phy_read(phydev, MII_ADVERTISE);
 975                 if (local_advertisement < 0)
 976                         return;
 977
 978                 remote_advertisement = phy_read(phydev, MII_LPA);
 979                 if (remote_advertisement < 0)
 980                         return;
 981
 982                 lan743x_phy_update_flowcontrol(adapter,
 983                                                ksettings.base.duplex,
 984                                                local_advertisement,
 985                                                remote_advertisement);
 986         }
 987 }
 988
 989 static void lan743x_phy_close(struct lan743x_adapter *adapter)
 990 {
 991         struct net_device *netdev = adapter->netdev;
 992
 993         phy_stop(netdev->phydev);
 994         phy_disconnect(netdev->phydev);
 995         netdev->phydev = NULL;
 996 }
 997
 998 static int lan743x_phy_open(struct lan743x_adapter *adapter)
 999 {
1000         struct lan743x_phy *phy = &adapter->phy;
1001         struct phy_device *phydev;
1002         struct net_device *netdev;
1003         int ret = -EIO;
1004         u32 mii_adv;
1005
1006         netdev = adapter->netdev;
1007         phydev = phy_find_first(adapter->mdiobus);
1008         if (!phydev)
1009                 goto return_error;
1010
1011         ret = phy_connect_direct(netdev, phydev,
1012                                  lan743x_phy_link_status_change,
1013                                  PHY_INTERFACE_MODE_GMII);
1014         if (ret)
1015                 goto return_error;
1016
1017         /* MAC doesn't support 1000T Half */
1018         phydev->supported &= ~SUPPORTED_1000baseT_Half;
1019
1020         /* support both flow controls */
1021         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1022         phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1023         mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
1024         phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
1025         phy->fc_autoneg = phydev->autoneg;
1026
1027         phy_start(phydev);
1028         phy_start_aneg(phydev);
1029         return 0;
1030
1031 return_error:
1032         return ret;
1033 }
1034
1035 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1036 {
1037         u8 *mac_addr;
1038         u32 mac_addr_hi = 0;
1039         u32 mac_addr_lo = 0;
1040
1041         /* Add mac address to perfect Filter */
1042         mac_addr = adapter->mac_address;
1043         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1044                       (((u32)(mac_addr[1])) << 8) |
1045                       (((u32)(mac_addr[2])) << 16) |
1046                       (((u32)(mac_addr[3])) << 24));
1047         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1048                       (((u32)(mac_addr[5])) << 8));
1049
1050         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1051         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1052                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1053 }
1054
1055 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1056 {
1057         struct net_device *netdev = adapter->netdev;
1058         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1059         u32 rfctl;
1060         u32 data;
1061
1062         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1063         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1064                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1065         rfctl |= RFE_CTL_AB_;
1066         if (netdev->flags & IFF_PROMISC) {
1067                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1068         } else {
1069                 if (netdev->flags & IFF_ALLMULTI)
1070                         rfctl |= RFE_CTL_AM_;
1071         }
1072
1073         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1074         if (netdev_mc_count(netdev)) {
1075                 struct netdev_hw_addr *ha;
1076                 int i;
1077
1078                 rfctl |= RFE_CTL_DA_PERFECT_;
1079                 i = 1;
1080                 netdev_for_each_mc_addr(ha, netdev) {
1081                         /* set first 32 into Perfect Filter */
1082                         if (i < 33) {
1083                                 lan743x_csr_write(adapter,
1084                                                   RFE_ADDR_FILT_HI(i), 0);
1085                                 data = ha->addr[3];
1086                                 data = ha->addr[2] | (data << 8);
1087                                 data = ha->addr[1] | (data << 8);
1088                                 data = ha->addr[0] | (data << 8);
1089                                 lan743x_csr_write(adapter,
1090                                                   RFE_ADDR_FILT_LO(i), data);
1091                                 data = ha->addr[5];
1092                                 data = ha->addr[4] | (data << 8);
1093                                 data |= RFE_ADDR_FILT_HI_VALID_;
1094                                 lan743x_csr_write(adapter,
1095                                                   RFE_ADDR_FILT_HI(i), data);
1096                         } else {
1097                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1098                                              23) & 0x1FF;
1099                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1100                                 rfctl |= RFE_CTL_MCAST_HASH_;
1101                         }
1102                         i++;
1103                 }
1104         }
1105
1106         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1107                          DP_SEL_VHF_VLAN_LEN,
1108                          DP_SEL_VHF_HASH_LEN, hash_table);
1109         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1110 }
1111
1112 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1113 {
1114         u32 data = 0;
1115
1116         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1117         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1118                                  0, 1000, 20000, 100);
1119         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1120         case DMA_DESCRIPTOR_SPACING_16:
1121                 data = DMAC_CFG_MAX_DSPACE_16_;
1122                 break;
1123         case DMA_DESCRIPTOR_SPACING_32:
1124                 data = DMAC_CFG_MAX_DSPACE_32_;
1125                 break;
1126         case DMA_DESCRIPTOR_SPACING_64:
1127                 data = DMAC_CFG_MAX_DSPACE_64_;
1128                 break;
1129         case DMA_DESCRIPTOR_SPACING_128:
1130                 data = DMAC_CFG_MAX_DSPACE_128_;
1131                 break;
1132         default:
1133                 return -EPERM;
1134         }
1135         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1136                 data |= DMAC_CFG_COAL_EN_;
1137         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1138         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1139         lan743x_csr_write(adapter, DMAC_CFG, data);
1140         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1141         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1142         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1143         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1144         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1145         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1146         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1147         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1148         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1149         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1150         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1151         return 0;
1152 }
1153
1154 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1155                                      int tx_channel)
1156 {
1157         u32 dmac_cmd = 0;
1158
1159         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1160         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1161                                       DMAC_CMD_START_T_(tx_channel)),
1162                                       (dmac_cmd &
1163                                       DMAC_CMD_STOP_T_(tx_channel)));
1164 }
1165
1166 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1167                                              int tx_channel)
1168 {
1169         int timeout = 100;
1170         int result = 0;
1171
1172         while (timeout &&
1173                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1174                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1175                 usleep_range(1000, 20000);
1176                 timeout--;
1177         }
1178         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1179                 result = -ENODEV;
1180         return result;
1181 }
1182
1183 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1184                                      int rx_channel)
1185 {
1186         u32 dmac_cmd = 0;
1187
1188         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1189         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1190                                       DMAC_CMD_START_R_(rx_channel)),
1191                                       (dmac_cmd &
1192                                       DMAC_CMD_STOP_R_(rx_channel)));
1193 }
1194
1195 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1196                                              int rx_channel)
1197 {
1198         int timeout = 100;
1199         int result = 0;
1200
1201         while (timeout &&
1202                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1203                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1204                 usleep_range(1000, 20000);
1205                 timeout--;
1206         }
1207         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1208                 result = -ENODEV;
1209         return result;
1210 }
1211
1212 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1213                                     int descriptor_index, bool cleanup)
1214 {
1215         struct lan743x_tx_buffer_info *buffer_info = NULL;
1216         struct lan743x_tx_descriptor *descriptor = NULL;
1217         u32 descriptor_type = 0;
1218
1219         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1220         buffer_info = &tx->buffer_info[descriptor_index];
1221         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1222                 goto done;
1223
1224         descriptor_type = (descriptor->data0) &
1225                           TX_DESC_DATA0_DTYPE_MASK_;
1226         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1227                 goto clean_up_data_descriptor;
1228         else
1229                 goto clear_active;
1230
1231 clean_up_data_descriptor:
1232         if (buffer_info->dma_ptr) {
1233                 if (buffer_info->flags &
1234                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1235                         dma_unmap_page(&tx->adapter->pdev->dev,
1236                                        buffer_info->dma_ptr,
1237                                        buffer_info->buffer_length,
1238                                        DMA_TO_DEVICE);
1239                 } else {
1240                         dma_unmap_single(&tx->adapter->pdev->dev,
1241                                          buffer_info->dma_ptr,
1242                                          buffer_info->buffer_length,
1243                                          DMA_TO_DEVICE);
1244                 }
1245                 buffer_info->dma_ptr = 0;
1246                 buffer_info->buffer_length = 0;
1247         }
1248         if (buffer_info->skb) {
1249                 dev_kfree_skb(buffer_info->skb);
1250                 buffer_info->skb = NULL;
1251         }
1252
1253 clear_active:
1254         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1255
1256 done:
1257         memset(buffer_info, 0, sizeof(*buffer_info));
1258         memset(descriptor, 0, sizeof(*descriptor));
1259 }
1260
1261 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1262 {
1263         return ((++index) % tx->ring_size);
1264 }
1265
1266 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1267 {
1268         while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1269                 lan743x_tx_release_desc(tx, tx->last_head, false);
1270                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1271         }
1272 }
1273
1274 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1275 {
1276         u32 original_head = 0;
1277
1278         original_head = tx->last_head;
1279         do {
1280                 lan743x_tx_release_desc(tx, tx->last_head, true);
1281                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1282         } while (tx->last_head != original_head);
1283         memset(tx->ring_cpu_ptr, 0,
1284                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1285         memset(tx->buffer_info, 0,
1286                sizeof(*tx->buffer_info) * (tx->ring_size));
1287 }
1288
1289 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1290                                    struct sk_buff *skb)
1291 {
1292         int result = 1; /* 1 for the main skb buffer */
1293         int nr_frags = 0;
1294
1295         if (skb_is_gso(skb))
1296                 result++; /* requires an extension descriptor */
1297         nr_frags = skb_shinfo(skb)->nr_frags;
1298         result += nr_frags; /* 1 for each fragment buffer */
1299         return result;
1300 }
1301
1302 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1303 {
1304         int last_head = tx->last_head;
1305         int last_tail = tx->last_tail;
1306
1307         if (last_tail >= last_head)
1308                 return tx->ring_size - last_tail + last_head - 1;
1309         else
1310                 return last_head - last_tail - 1;
1311 }
1312
1313 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1314                                   unsigned char *first_buffer,
1315                                   unsigned int first_buffer_length,
1316                                   unsigned int frame_length,
1317                                   bool check_sum)
1318 {
1319         /* called only from within lan743x_tx_xmit_frame.
1320          * assuming tx->ring_lock has already been acquired.
1321          */
1322         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1323         struct lan743x_tx_buffer_info *buffer_info = NULL;
1324         struct lan743x_adapter *adapter = tx->adapter;
1325         struct device *dev = &adapter->pdev->dev;
1326         dma_addr_t dma_ptr;
1327
1328         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1329         tx->frame_first = tx->last_tail;
1330         tx->frame_tail = tx->frame_first;
1331
1332         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1333         buffer_info = &tx->buffer_info[tx->frame_tail];
1334         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1335                                  DMA_TO_DEVICE);
1336         if (dma_mapping_error(dev, dma_ptr))
1337                 return -ENOMEM;
1338
1339         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1340         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1341         tx_descriptor->data3 = (frame_length << 16) &
1342                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1343
1344         buffer_info->skb = NULL;
1345         buffer_info->dma_ptr = dma_ptr;
1346         buffer_info->buffer_length = first_buffer_length;
1347         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1348
1349         tx->frame_data0 = (first_buffer_length &
1350                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1351                 TX_DESC_DATA0_DTYPE_DATA_ |
1352                 TX_DESC_DATA0_FS_ |
1353                 TX_DESC_DATA0_FCS_;
1354
1355         if (check_sum)
1356                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1357                                    TX_DESC_DATA0_IPE_ |
1358                                    TX_DESC_DATA0_TPE_;
1359
1360         /* data0 will be programmed in one of other frame assembler functions */
1361         return 0;
1362 }
1363
1364 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1365                                      unsigned int frame_length)
1366 {
1367         /* called only from within lan743x_tx_xmit_frame.
1368          * assuming tx->ring_lock has already been acquired.
1369          */
1370         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1371         struct lan743x_tx_buffer_info *buffer_info = NULL;
1372
1373         /* wrap up previous descriptor */
1374         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1375         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1376         tx_descriptor->data0 = tx->frame_data0;
1377
1378         /* move to next descriptor */
1379         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1380         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1381         buffer_info = &tx->buffer_info[tx->frame_tail];
1382
1383         /* add extension descriptor */
1384         tx_descriptor->data1 = 0;
1385         tx_descriptor->data2 = 0;
1386         tx_descriptor->data3 = 0;
1387
1388         buffer_info->skb = NULL;
1389         buffer_info->dma_ptr = 0;
1390         buffer_info->buffer_length = 0;
1391         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1392
1393         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1394                           TX_DESC_DATA0_DTYPE_EXT_ |
1395                           TX_DESC_DATA0_EXT_LSO_;
1396
1397         /* data0 will be programmed in one of other frame assembler functions */
1398 }
1399
1400 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1401                                          const struct skb_frag_struct *fragment,
1402                                          unsigned int frame_length)
1403 {
1404         /* called only from within lan743x_tx_xmit_frame
1405          * assuming tx->ring_lock has already been acquired
1406          */
1407         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1408         struct lan743x_tx_buffer_info *buffer_info = NULL;
1409         struct lan743x_adapter *adapter = tx->adapter;
1410         struct device *dev = &adapter->pdev->dev;
1411         unsigned int fragment_length = 0;
1412         dma_addr_t dma_ptr;
1413
1414         fragment_length = skb_frag_size(fragment);
1415         if (!fragment_length)
1416                 return 0;
1417
1418         /* wrap up previous descriptor */
1419         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1420         tx_descriptor->data0 = tx->frame_data0;
1421
1422         /* move to next descriptor */
1423         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1424         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1425         buffer_info = &tx->buffer_info[tx->frame_tail];
1426         dma_ptr = skb_frag_dma_map(dev, fragment,
1427                                    0, fragment_length,
1428                                    DMA_TO_DEVICE);
1429         if (dma_mapping_error(dev, dma_ptr)) {
1430                 int desc_index;
1431
1432                 /* cleanup all previously setup descriptors */
1433                 desc_index = tx->frame_first;
1434                 while (desc_index != tx->frame_tail) {
1435                         lan743x_tx_release_desc(tx, desc_index, true);
1436                         desc_index = lan743x_tx_next_index(tx, desc_index);
1437                 }
1438                 dma_wmb();
1439                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1440                 tx->frame_first = 0;
1441                 tx->frame_data0 = 0;
1442                 tx->frame_tail = 0;
1443                 return -ENOMEM;
1444         }
1445
1446         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1447         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1448         tx_descriptor->data3 = (frame_length << 16) &
1449                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1450
1451         buffer_info->skb = NULL;
1452         buffer_info->dma_ptr = dma_ptr;
1453         buffer_info->buffer_length = fragment_length;
1454         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1455         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1456
1457         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1458                           TX_DESC_DATA0_DTYPE_DATA_ |
1459                           TX_DESC_DATA0_FCS_;
1460
1461         /* data0 will be programmed in one of other frame assembler functions */
1462         return 0;
1463 }
1464
1465 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1466                                  struct sk_buff *skb,
1467                                  bool ignore_sync)
1468 {
1469         /* called only from within lan743x_tx_xmit_frame
1470          * assuming tx->ring_lock has already been acquired
1471          */
1472         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1473         struct lan743x_tx_buffer_info *buffer_info = NULL;
1474         struct lan743x_adapter *adapter = tx->adapter;
1475         u32 tx_tail_flags = 0;
1476
1477         /* wrap up previous descriptor */
1478         tx->frame_data0 |= TX_DESC_DATA0_LS_;
1479         tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1480
1481         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1482         buffer_info = &tx->buffer_info[tx->frame_tail];
1483         buffer_info->skb = skb;
1484         if (ignore_sync)
1485                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1486
1487         tx_descriptor->data0 = tx->frame_data0;
1488         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1489         tx->last_tail = tx->frame_tail;
1490
1491         dma_wmb();
1492
1493         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1494                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1495         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1496                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1497                 TX_TAIL_SET_TOP_INT_EN_;
1498
1499         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1500                           tx_tail_flags | tx->frame_tail);
1501         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1502 }
1503
1504 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1505                                          struct sk_buff *skb)
1506 {
1507         int required_number_of_descriptors = 0;
1508         unsigned int start_frame_length = 0;
1509         unsigned int frame_length = 0;
1510         unsigned int head_length = 0;
1511         unsigned long irq_flags = 0;
1512         bool ignore_sync = false;
1513         int nr_frags = 0;
1514         bool gso = false;
1515         int j;
1516
1517         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1518
1519         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1520         if (required_number_of_descriptors >
1521                 lan743x_tx_get_avail_desc(tx)) {
1522                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1523                         dev_kfree_skb(skb);
1524                 } else {
1525                         /* save to overflow buffer */
1526                         tx->overflow_skb = skb;
1527                         netif_stop_queue(tx->adapter->netdev);
1528                 }
1529                 goto unlock;
1530         }
1531
1532         /* space available, transmit skb  */
1533         head_length = skb_headlen(skb);
1534         frame_length = skb_pagelen(skb);
1535         nr_frags = skb_shinfo(skb)->nr_frags;
1536         start_frame_length = frame_length;
1537         gso = skb_is_gso(skb);
1538         if (gso) {
1539                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1540                                          (unsigned short)8);
1541         }
1542
1543         if (lan743x_tx_frame_start(tx,
1544                                    skb->data, head_length,
1545                                    start_frame_length,
1546                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1547                 dev_kfree_skb(skb);
1548                 goto unlock;
1549         }
1550
1551         if (gso)
1552                 lan743x_tx_frame_add_lso(tx, frame_length);
1553
1554         if (nr_frags <= 0)
1555                 goto finish;
1556
1557         for (j = 0; j < nr_frags; j++) {
1558                 const struct skb_frag_struct *frag;
1559
1560                 frag = &(skb_shinfo(skb)->frags[j]);
1561                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1562                         /* upon error no need to call
1563                          *      lan743x_tx_frame_end
1564                          * frame assembler clean up was performed inside
1565                          *      lan743x_tx_frame_add_fragment
1566                          */
1567                         dev_kfree_skb(skb);
1568                         goto unlock;
1569                 }
1570         }
1571
1572 finish:
1573         lan743x_tx_frame_end(tx, skb, ignore_sync);
1574
1575 unlock:
1576         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1577         return NETDEV_TX_OK;
1578 }
1579
1580 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1581 {
1582         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1583         struct lan743x_adapter *adapter = tx->adapter;
1584         bool start_transmitter = false;
1585         unsigned long irq_flags = 0;
1586         u32 ioc_bit = 0;
1587         u32 int_sts = 0;
1588
1589         adapter = tx->adapter;
1590         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1591         int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1592         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1593                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1594         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1595
1596         /* clean up tx ring */
1597         lan743x_tx_release_completed_descriptors(tx);
1598         if (netif_queue_stopped(adapter->netdev)) {
1599                 if (tx->overflow_skb) {
1600                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1601                                 lan743x_tx_get_avail_desc(tx))
1602                                 start_transmitter = true;
1603                 } else {
1604                         netif_wake_queue(adapter->netdev);
1605                 }
1606         }
1607         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1608
1609         if (start_transmitter) {
1610                 /* space is now available, transmit overflow skb */
1611                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1612                 tx->overflow_skb = NULL;
1613                 netif_wake_queue(adapter->netdev);
1614         }
1615
1616         if (!napi_complete_done(napi, weight))
1617                 goto done;
1618
1619         /* enable isr */
1620         lan743x_csr_write(adapter, INT_EN_SET,
1621                           INT_BIT_DMA_TX_(tx->channel_number));
1622         lan743x_csr_read(adapter, INT_STS);
1623
1624 done:
1625         return weight;
1626 }
1627
1628 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1629 {
1630         if (tx->head_cpu_ptr) {
1631                 pci_free_consistent(tx->adapter->pdev,
1632                                     sizeof(*tx->head_cpu_ptr),
1633                                     (void *)(tx->head_cpu_ptr),
1634                                     tx->head_dma_ptr);
1635                 tx->head_cpu_ptr = NULL;
1636                 tx->head_dma_ptr = 0;
1637         }
1638         kfree(tx->buffer_info);
1639         tx->buffer_info = NULL;
1640
1641         if (tx->ring_cpu_ptr) {
1642                 pci_free_consistent(tx->adapter->pdev,
1643                                     tx->ring_allocation_size,
1644                                     tx->ring_cpu_ptr,
1645                                     tx->ring_dma_ptr);
1646                 tx->ring_allocation_size = 0;
1647                 tx->ring_cpu_ptr = NULL;
1648                 tx->ring_dma_ptr = 0;
1649         }
1650         tx->ring_size = 0;
1651 }
1652
1653 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1654 {
1655         size_t ring_allocation_size = 0;
1656         void *cpu_ptr = NULL;
1657         dma_addr_t dma_ptr;
1658         int ret = -ENOMEM;
1659
1660         tx->ring_size = LAN743X_TX_RING_SIZE;
1661         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1662                 ret = -EINVAL;
1663                 goto cleanup;
1664         }
1665         ring_allocation_size = ALIGN(tx->ring_size *
1666                                      sizeof(struct lan743x_tx_descriptor),
1667                                      PAGE_SIZE);
1668         dma_ptr = 0;
1669         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1670                                         ring_allocation_size, &dma_ptr);
1671         if (!cpu_ptr) {
1672                 ret = -ENOMEM;
1673                 goto cleanup;
1674         }
1675
1676         tx->ring_allocation_size = ring_allocation_size;
1677         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1678         tx->ring_dma_ptr = dma_ptr;
1679
1680         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1681         if (!cpu_ptr) {
1682                 ret = -ENOMEM;
1683                 goto cleanup;
1684         }
1685         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1686         dma_ptr = 0;
1687         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1688                                         sizeof(*tx->head_cpu_ptr), &dma_ptr);
1689         if (!cpu_ptr) {
1690                 ret = -ENOMEM;
1691                 goto cleanup;
1692         }
1693
1694         tx->head_cpu_ptr = cpu_ptr;
1695         tx->head_dma_ptr = dma_ptr;
1696         if (tx->head_dma_ptr & 0x3) {
1697                 ret = -ENOMEM;
1698                 goto cleanup;
1699         }
1700
1701         return 0;
1702
1703 cleanup:
1704         lan743x_tx_ring_cleanup(tx);
1705         return ret;
1706 }
1707
1708 static void lan743x_tx_close(struct lan743x_tx *tx)
1709 {
1710         struct lan743x_adapter *adapter = tx->adapter;
1711
1712         lan743x_csr_write(adapter,
1713                           DMAC_CMD,
1714                           DMAC_CMD_STOP_T_(tx->channel_number));
1715         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1716
1717         lan743x_csr_write(adapter,
1718                           DMAC_INT_EN_CLR,
1719                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1720         lan743x_csr_write(adapter, INT_EN_CLR,
1721                           INT_BIT_DMA_TX_(tx->channel_number));
1722         napi_disable(&tx->napi);
1723         netif_napi_del(&tx->napi);
1724
1725         lan743x_csr_write(adapter, FCT_TX_CTL,
1726                           FCT_TX_CTL_DIS_(tx->channel_number));
1727         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1728                                  FCT_TX_CTL_EN_(tx->channel_number),
1729                                  0, 1000, 20000, 100);
1730
1731         lan743x_tx_release_all_descriptors(tx);
1732
1733         if (tx->overflow_skb) {
1734                 dev_kfree_skb(tx->overflow_skb);
1735                 tx->overflow_skb = NULL;
1736         }
1737
1738         lan743x_tx_ring_cleanup(tx);
1739 }
1740
1741 static int lan743x_tx_open(struct lan743x_tx *tx)
1742 {
1743         struct lan743x_adapter *adapter = NULL;
1744         u32 data = 0;
1745         int ret;
1746
1747         adapter = tx->adapter;
1748         ret = lan743x_tx_ring_init(tx);
1749         if (ret)
1750                 return ret;
1751
1752         /* initialize fifo */
1753         lan743x_csr_write(adapter, FCT_TX_CTL,
1754                           FCT_TX_CTL_RESET_(tx->channel_number));
1755         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1756                                  FCT_TX_CTL_RESET_(tx->channel_number),
1757                                  0, 1000, 20000, 100);
1758
1759         /* enable fifo */
1760         lan743x_csr_write(adapter, FCT_TX_CTL,
1761                           FCT_TX_CTL_EN_(tx->channel_number));
1762
1763         /* reset tx channel */
1764         lan743x_csr_write(adapter, DMAC_CMD,
1765                           DMAC_CMD_TX_SWR_(tx->channel_number));
1766         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1767                                  DMAC_CMD_TX_SWR_(tx->channel_number),
1768                                  0, 1000, 20000, 100);
1769
1770         /* Write TX_BASE_ADDR */
1771         lan743x_csr_write(adapter,
1772                           TX_BASE_ADDRH(tx->channel_number),
1773                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1774         lan743x_csr_write(adapter,
1775                           TX_BASE_ADDRL(tx->channel_number),
1776                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
1777
1778         /* Write TX_CFG_B */
1779         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1780         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1781         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1782         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1783                 data |= TX_CFG_B_TDMABL_512_;
1784         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1785
1786         /* Write TX_CFG_A */
1787         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1788         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1789                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1790                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1791                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1792                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1793         }
1794         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1795
1796         /* Write TX_HEAD_WRITEBACK_ADDR */
1797         lan743x_csr_write(adapter,
1798                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1799                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
1800         lan743x_csr_write(adapter,
1801                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1802                           DMA_ADDR_LOW32(tx->head_dma_ptr));
1803
1804         /* set last head */
1805         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1806
1807         /* write TX_TAIL */
1808         tx->last_tail = 0;
1809         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1810                           (u32)(tx->last_tail));
1811         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1812                                                          INT_BIT_DMA_TX_
1813                                                          (tx->channel_number));
1814         netif_napi_add(adapter->netdev,
1815                        &tx->napi, lan743x_tx_napi_poll,
1816                        tx->ring_size - 1);
1817         napi_enable(&tx->napi);
1818
1819         data = 0;
1820         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1821                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1822         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1823                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1824         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1825                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1826         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1827                 data |= TX_CFG_C_TX_INT_EN_R2C_;
1828         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1829
1830         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1831                 lan743x_csr_write(adapter, INT_EN_SET,
1832                                   INT_BIT_DMA_TX_(tx->channel_number));
1833         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1834                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1835
1836         /*  start dmac channel */
1837         lan743x_csr_write(adapter, DMAC_CMD,
1838                           DMAC_CMD_START_T_(tx->channel_number));
1839         return 0;
1840 }
1841
1842 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1843 {
1844         return ((++index) % rx->ring_size);
1845 }
1846
1847 static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1848 {
1849         struct lan743x_rx_buffer_info *buffer_info;
1850         struct lan743x_rx_descriptor *descriptor;
1851         int length = 0;
1852
1853         length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1854         descriptor = &rx->ring_cpu_ptr[index];
1855         buffer_info = &rx->buffer_info[index];
1856         buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1857                                               length,
1858                                               GFP_ATOMIC | GFP_DMA);
1859         if (!(buffer_info->skb))
1860                 return -ENOMEM;
1861         buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1862                                               buffer_info->skb->data,
1863                                               length,
1864                                               DMA_FROM_DEVICE);
1865         if (dma_mapping_error(&rx->adapter->pdev->dev,
1866                               buffer_info->dma_ptr)) {
1867                 buffer_info->dma_ptr = 0;
1868                 return -ENOMEM;
1869         }
1870
1871         buffer_info->buffer_length = length;
1872         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1873         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1874         descriptor->data3 = 0;
1875         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1876                             (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1877         skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1878
1879         return 0;
1880 }
1881
1882 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1883 {
1884         struct lan743x_rx_buffer_info *buffer_info;
1885         struct lan743x_rx_descriptor *descriptor;
1886
1887         descriptor = &rx->ring_cpu_ptr[index];
1888         buffer_info = &rx->buffer_info[index];
1889
1890         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1891         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1892         descriptor->data3 = 0;
1893         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1894                             ((buffer_info->buffer_length) &
1895                             RX_DESC_DATA0_BUF_LENGTH_MASK_));
1896 }
1897
1898 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1899 {
1900         struct lan743x_rx_buffer_info *buffer_info;
1901         struct lan743x_rx_descriptor *descriptor;
1902
1903         descriptor = &rx->ring_cpu_ptr[index];
1904         buffer_info = &rx->buffer_info[index];
1905
1906         memset(descriptor, 0, sizeof(*descriptor));
1907
1908         if (buffer_info->dma_ptr) {
1909                 dma_unmap_single(&rx->adapter->pdev->dev,
1910                                  buffer_info->dma_ptr,
1911                                  buffer_info->buffer_length,
1912                                  DMA_FROM_DEVICE);
1913                 buffer_info->dma_ptr = 0;
1914         }
1915
1916         if (buffer_info->skb) {
1917                 dev_kfree_skb(buffer_info->skb);
1918                 buffer_info->skb = NULL;
1919         }
1920
1921         memset(buffer_info, 0, sizeof(*buffer_info));
1922 }
1923
1924 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1925 {
1926         struct skb_shared_hwtstamps *hwtstamps = NULL;
1927         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1928         struct lan743x_rx_buffer_info *buffer_info;
1929         struct lan743x_rx_descriptor *descriptor;
1930         int current_head_index = -1;
1931         int extension_index = -1;
1932         int first_index = -1;
1933         int last_index = -1;
1934
1935         current_head_index = *rx->head_cpu_ptr;
1936         if (current_head_index < 0 || current_head_index >= rx->ring_size)
1937                 goto done;
1938
1939         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
1940                 goto done;
1941
1942         if (rx->last_head != current_head_index) {
1943                 descriptor = &rx->ring_cpu_ptr[rx->last_head];
1944                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1945                         goto done;
1946
1947                 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
1948                         goto done;
1949
1950                 first_index = rx->last_head;
1951                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
1952                         last_index = rx->last_head;
1953                 } else {
1954                         int index;
1955
1956                         index = lan743x_rx_next_index(rx, first_index);
1957                         while (index != current_head_index) {
1958                                 descriptor = &rx->ring_cpu_ptr[index];
1959                                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1960                                         goto done;
1961
1962                                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
1963                                         last_index = index;
1964                                         break;
1965                                 }
1966                                 index = lan743x_rx_next_index(rx, index);
1967                         }
1968                 }
1969                 if (last_index >= 0) {
1970                         descriptor = &rx->ring_cpu_ptr[last_index];
1971                         if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
1972                                 /* extension is expected to follow */
1973                                 int index = lan743x_rx_next_index(rx,
1974                                                                   last_index);
1975                                 if (index != current_head_index) {
1976                                         descriptor = &rx->ring_cpu_ptr[index];
1977                                         if (descriptor->data0 &
1978                                             RX_DESC_DATA0_OWN_) {
1979                                                 goto done;
1980                                         }
1981                                         if (descriptor->data0 &
1982                                             RX_DESC_DATA0_EXT_) {
1983                                                 extension_index = index;
1984                                         } else {
1985                                                 goto done;
1986                                         }
1987                                 } else {
1988                                         /* extension is not yet available */
1989                                         /* prevent processing of this packet */
1990                                         first_index = -1;
1991                                         last_index = -1;
1992                                 }
1993                         }
1994                 }
1995         }
1996         if (first_index >= 0 && last_index >= 0) {
1997                 int real_last_index = last_index;
1998                 struct sk_buff *skb = NULL;
1999                 u32 ts_sec = 0;
2000                 u32 ts_nsec = 0;
2001
2002                 /* packet is available */
2003                 if (first_index == last_index) {
2004                         /* single buffer packet */
2005                         int packet_length;
2006
2007                         buffer_info = &rx->buffer_info[first_index];
2008                         skb = buffer_info->skb;
2009                         descriptor = &rx->ring_cpu_ptr[first_index];
2010
2011                         /* unmap from dma */
2012                         if (buffer_info->dma_ptr) {
2013                                 dma_unmap_single(&rx->adapter->pdev->dev,
2014                                                  buffer_info->dma_ptr,
2015                                                  buffer_info->buffer_length,
2016                                                  DMA_FROM_DEVICE);
2017                                 buffer_info->dma_ptr = 0;
2018                                 buffer_info->buffer_length = 0;
2019                         }
2020                         buffer_info->skb = NULL;
2021                         packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2022                                         (descriptor->data0);
2023                         skb_put(skb, packet_length - 4);
2024                         skb->protocol = eth_type_trans(skb,
2025                                                        rx->adapter->netdev);
2026                         lan743x_rx_allocate_ring_element(rx, first_index);
2027                 } else {
2028                         int index = first_index;
2029
2030                         /* multi buffer packet not supported */
2031                         /* this should not happen since
2032                          * buffers are allocated to be at least jumbo size
2033                          */
2034
2035                         /* clean up buffers */
2036                         if (first_index <= last_index) {
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                         } else {
2047                                 while ((index >= first_index) ||
2048                                        (index <= last_index)) {
2049                                         lan743x_rx_release_ring_element(rx,
2050                                                                         index);
2051                                         lan743x_rx_allocate_ring_element(rx,
2052                                                                          index);
2053                                         index = lan743x_rx_next_index(rx,
2054                                                                       index);
2055                                 }
2056                         }
2057                 }
2058
2059                 if (extension_index >= 0) {
2060                         descriptor = &rx->ring_cpu_ptr[extension_index];
2061                         buffer_info = &rx->buffer_info[extension_index];
2062
2063                         ts_sec = descriptor->data1;
2064                         ts_nsec = (descriptor->data2 &
2065                                   RX_DESC_DATA2_TS_NS_MASK_);
2066                         lan743x_rx_reuse_ring_element(rx, extension_index);
2067                         real_last_index = extension_index;
2068                 }
2069
2070                 if (!skb) {
2071                         result = RX_PROCESS_RESULT_PACKET_DROPPED;
2072                         goto move_forward;
2073                 }
2074
2075                 if (extension_index < 0)
2076                         goto pass_packet_to_os;
2077                 hwtstamps = skb_hwtstamps(skb);
2078                 if (hwtstamps)
2079                         hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2080
2081 pass_packet_to_os:
2082                 /* pass packet to OS */
2083                 napi_gro_receive(&rx->napi, skb);
2084                 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2085
2086 move_forward:
2087                 /* push tail and head forward */
2088                 rx->last_tail = real_last_index;
2089                 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2090         }
2091 done:
2092         return result;
2093 }
2094
2095 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2096 {
2097         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2098         struct lan743x_adapter *adapter = rx->adapter;
2099         u32 rx_tail_flags = 0;
2100         int count;
2101
2102         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2103                 /* clear int status bit before reading packet */
2104                 lan743x_csr_write(adapter, DMAC_INT_STS,
2105                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2106         }
2107         count = 0;
2108         while (count < weight) {
2109                 int rx_process_result = -1;
2110
2111                 rx_process_result = lan743x_rx_process_packet(rx);
2112                 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2113                         count++;
2114                 } else if (rx_process_result ==
2115                         RX_PROCESS_RESULT_NOTHING_TO_DO) {
2116                         break;
2117                 } else if (rx_process_result ==
2118                         RX_PROCESS_RESULT_PACKET_DROPPED) {
2119                         continue;
2120                 }
2121         }
2122         rx->frame_count += count;
2123         if (count == weight)
2124                 goto done;
2125
2126         if (!napi_complete_done(napi, count))
2127                 goto done;
2128
2129         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2130                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2131         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2132                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2133         } else {
2134                 lan743x_csr_write(adapter, INT_EN_SET,
2135                                   INT_BIT_DMA_RX_(rx->channel_number));
2136         }
2137
2138         /* update RX_TAIL */
2139         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2140                           rx_tail_flags | rx->last_tail);
2141 done:
2142         return count;
2143 }
2144
2145 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2146 {
2147         if (rx->buffer_info && rx->ring_cpu_ptr) {
2148                 int index;
2149
2150                 for (index = 0; index < rx->ring_size; index++)
2151                         lan743x_rx_release_ring_element(rx, index);
2152         }
2153
2154         if (rx->head_cpu_ptr) {
2155                 pci_free_consistent(rx->adapter->pdev,
2156                                     sizeof(*rx->head_cpu_ptr),
2157                                     rx->head_cpu_ptr,
2158                                     rx->head_dma_ptr);
2159                 rx->head_cpu_ptr = NULL;
2160                 rx->head_dma_ptr = 0;
2161         }
2162
2163         kfree(rx->buffer_info);
2164         rx->buffer_info = NULL;
2165
2166         if (rx->ring_cpu_ptr) {
2167                 pci_free_consistent(rx->adapter->pdev,
2168                                     rx->ring_allocation_size,
2169                                     rx->ring_cpu_ptr,
2170                                     rx->ring_dma_ptr);
2171                 rx->ring_allocation_size = 0;
2172                 rx->ring_cpu_ptr = NULL;
2173                 rx->ring_dma_ptr = 0;
2174         }
2175
2176         rx->ring_size = 0;
2177         rx->last_head = 0;
2178 }
2179
2180 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2181 {
2182         size_t ring_allocation_size = 0;
2183         dma_addr_t dma_ptr = 0;
2184         void *cpu_ptr = NULL;
2185         int ret = -ENOMEM;
2186         int index = 0;
2187
2188         rx->ring_size = LAN743X_RX_RING_SIZE;
2189         if (rx->ring_size <= 1) {
2190                 ret = -EINVAL;
2191                 goto cleanup;
2192         }
2193         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2194                 ret = -EINVAL;
2195                 goto cleanup;
2196         }
2197         ring_allocation_size = ALIGN(rx->ring_size *
2198                                      sizeof(struct lan743x_rx_descriptor),
2199                                      PAGE_SIZE);
2200         dma_ptr = 0;
2201         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2202                                         ring_allocation_size, &dma_ptr);
2203         if (!cpu_ptr) {
2204                 ret = -ENOMEM;
2205                 goto cleanup;
2206         }
2207         rx->ring_allocation_size = ring_allocation_size;
2208         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2209         rx->ring_dma_ptr = dma_ptr;
2210
2211         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2212                           GFP_KERNEL);
2213         if (!cpu_ptr) {
2214                 ret = -ENOMEM;
2215                 goto cleanup;
2216         }
2217         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2218         dma_ptr = 0;
2219         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2220                                         sizeof(*rx->head_cpu_ptr), &dma_ptr);
2221         if (!cpu_ptr) {
2222                 ret = -ENOMEM;
2223                 goto cleanup;
2224         }
2225
2226         rx->head_cpu_ptr = cpu_ptr;
2227         rx->head_dma_ptr = dma_ptr;
2228         if (rx->head_dma_ptr & 0x3) {
2229                 ret = -ENOMEM;
2230                 goto cleanup;
2231         }
2232
2233         rx->last_head = 0;
2234         for (index = 0; index < rx->ring_size; index++) {
2235                 ret = lan743x_rx_allocate_ring_element(rx, index);
2236                 if (ret)
2237                         goto cleanup;
2238         }
2239         return 0;
2240
2241 cleanup:
2242         lan743x_rx_ring_cleanup(rx);
2243         return ret;
2244 }
2245
2246 static void lan743x_rx_close(struct lan743x_rx *rx)
2247 {
2248         struct lan743x_adapter *adapter = rx->adapter;
2249
2250         lan743x_csr_write(adapter, FCT_RX_CTL,
2251                           FCT_RX_CTL_DIS_(rx->channel_number));
2252         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2253                                  FCT_RX_CTL_EN_(rx->channel_number),
2254                                  0, 1000, 20000, 100);
2255
2256         lan743x_csr_write(adapter, DMAC_CMD,
2257                           DMAC_CMD_STOP_R_(rx->channel_number));
2258         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2259
2260         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2261                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2262         lan743x_csr_write(adapter, INT_EN_CLR,
2263                           INT_BIT_DMA_RX_(rx->channel_number));
2264         napi_disable(&rx->napi);
2265
2266         netif_napi_del(&rx->napi);
2267
2268         lan743x_rx_ring_cleanup(rx);
2269 }
2270
2271 static int lan743x_rx_open(struct lan743x_rx *rx)
2272 {
2273         struct lan743x_adapter *adapter = rx->adapter;
2274         u32 data = 0;
2275         int ret;
2276
2277         rx->frame_count = 0;
2278         ret = lan743x_rx_ring_init(rx);
2279         if (ret)
2280                 goto return_error;
2281
2282         netif_napi_add(adapter->netdev,
2283                        &rx->napi, lan743x_rx_napi_poll,
2284                        rx->ring_size - 1);
2285
2286         lan743x_csr_write(adapter, DMAC_CMD,
2287                           DMAC_CMD_RX_SWR_(rx->channel_number));
2288         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2289                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2290                                  0, 1000, 20000, 100);
2291
2292         /* set ring base address */
2293         lan743x_csr_write(adapter,
2294                           RX_BASE_ADDRH(rx->channel_number),
2295                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2296         lan743x_csr_write(adapter,
2297                           RX_BASE_ADDRL(rx->channel_number),
2298                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2299
2300         /* set rx write back address */
2301         lan743x_csr_write(adapter,
2302                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2303                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2304         lan743x_csr_write(adapter,
2305                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2306                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2307         data = RX_CFG_A_RX_HP_WB_EN_;
2308         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2309                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2310                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2311                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2312                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2313         }
2314
2315         /* set RX_CFG_A */
2316         lan743x_csr_write(adapter,
2317                           RX_CFG_A(rx->channel_number), data);
2318
2319         /* set RX_CFG_B */
2320         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2321         data &= ~RX_CFG_B_RX_PAD_MASK_;
2322         if (!RX_HEAD_PADDING)
2323                 data |= RX_CFG_B_RX_PAD_0_;
2324         else
2325                 data |= RX_CFG_B_RX_PAD_2_;
2326         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2327         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2328         data |= RX_CFG_B_TS_ALL_RX_;
2329         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2330                 data |= RX_CFG_B_RDMABL_512_;
2331
2332         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2333         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2334                                                          INT_BIT_DMA_RX_
2335                                                          (rx->channel_number));
2336
2337         /* set RX_CFG_C */
2338         data = 0;
2339         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2340                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2341         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2342                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2343         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2344                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2345         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2346                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2347         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2348
2349         rx->last_tail = ((u32)(rx->ring_size - 1));
2350         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2351                           rx->last_tail);
2352         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2353         if (rx->last_head) {
2354                 ret = -EIO;
2355                 goto napi_delete;
2356         }
2357
2358         napi_enable(&rx->napi);
2359
2360         lan743x_csr_write(adapter, INT_EN_SET,
2361                           INT_BIT_DMA_RX_(rx->channel_number));
2362         lan743x_csr_write(adapter, DMAC_INT_STS,
2363                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2364         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2365                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2366         lan743x_csr_write(adapter, DMAC_CMD,
2367                           DMAC_CMD_START_R_(rx->channel_number));
2368
2369         /* initialize fifo */
2370         lan743x_csr_write(adapter, FCT_RX_CTL,
2371                           FCT_RX_CTL_RESET_(rx->channel_number));
2372         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2373                                  FCT_RX_CTL_RESET_(rx->channel_number),
2374                                  0, 1000, 20000, 100);
2375         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2376                           FCT_FLOW_CTL_REQ_EN_ |
2377                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2378                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2379
2380         /* enable fifo */
2381         lan743x_csr_write(adapter, FCT_RX_CTL,
2382                           FCT_RX_CTL_EN_(rx->channel_number));
2383         return 0;
2384
2385 napi_delete:
2386         netif_napi_del(&rx->napi);
2387         lan743x_rx_ring_cleanup(rx);
2388
2389 return_error:
2390         return ret;
2391 }
2392
2393 static int lan743x_netdev_close(struct net_device *netdev)
2394 {
2395         struct lan743x_adapter *adapter = netdev_priv(netdev);
2396         int index;
2397
2398         lan743x_tx_close(&adapter->tx[0]);
2399
2400         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2401                 lan743x_rx_close(&adapter->rx[index]);
2402
2403         lan743x_phy_close(adapter);
2404
2405         lan743x_mac_close(adapter);
2406
2407         lan743x_intr_close(adapter);
2408
2409         return 0;
2410 }
2411
2412 static int lan743x_netdev_open(struct net_device *netdev)
2413 {
2414         struct lan743x_adapter *adapter = netdev_priv(netdev);
2415         int index;
2416         int ret;
2417
2418         ret = lan743x_intr_open(adapter);
2419         if (ret)
2420                 goto return_error;
2421
2422         ret = lan743x_mac_open(adapter);
2423         if (ret)
2424                 goto close_intr;
2425
2426         ret = lan743x_phy_open(adapter);
2427         if (ret)
2428                 goto close_mac;
2429
2430         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2431                 ret = lan743x_rx_open(&adapter->rx[index]);
2432                 if (ret)
2433                         goto close_rx;
2434         }
2435
2436         ret = lan743x_tx_open(&adapter->tx[0]);
2437         if (ret)
2438                 goto close_rx;
2439
2440         return 0;
2441
2442 close_rx:
2443         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2444                 if (adapter->rx[index].ring_cpu_ptr)
2445                         lan743x_rx_close(&adapter->rx[index]);
2446         }
2447         lan743x_phy_close(adapter);
2448
2449 close_mac:
2450         lan743x_mac_close(adapter);
2451
2452 close_intr:
2453         lan743x_intr_close(adapter);
2454
2455 return_error:
2456         netif_warn(adapter, ifup, adapter->netdev,
2457                    "Error opening LAN743x\n");
2458         return ret;
2459 }
2460
2461 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2462                                              struct net_device *netdev)
2463 {
2464         struct lan743x_adapter *adapter = netdev_priv(netdev);
2465
2466         return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2467 }
2468
2469 static int lan743x_netdev_ioctl(struct net_device *netdev,
2470                                 struct ifreq *ifr, int cmd)
2471 {
2472         if (!netif_running(netdev))
2473                 return -EINVAL;
2474         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2475 }
2476
2477 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2478 {
2479         struct lan743x_adapter *adapter = netdev_priv(netdev);
2480
2481         lan743x_rfe_set_multicast(adapter);
2482 }
2483
2484 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2485 {
2486         struct lan743x_adapter *adapter = netdev_priv(netdev);
2487         int ret = 0;
2488
2489         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2490         if (!ret)
2491                 netdev->mtu = new_mtu;
2492         return ret;
2493 }
2494
2495 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2496                                        struct rtnl_link_stats64 *stats)
2497 {
2498         struct lan743x_adapter *adapter = netdev_priv(netdev);
2499
2500         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2501         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2502         stats->rx_bytes = lan743x_csr_read(adapter,
2503                                            STAT_RX_UNICAST_BYTE_COUNT) +
2504                           lan743x_csr_read(adapter,
2505                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2506                           lan743x_csr_read(adapter,
2507                                            STAT_RX_MULTICAST_BYTE_COUNT);
2508         stats->tx_bytes = lan743x_csr_read(adapter,
2509                                            STAT_TX_UNICAST_BYTE_COUNT) +
2510                           lan743x_csr_read(adapter,
2511                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2512                           lan743x_csr_read(adapter,
2513                                            STAT_TX_MULTICAST_BYTE_COUNT);
2514         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2515                            lan743x_csr_read(adapter,
2516                                             STAT_RX_ALIGNMENT_ERRORS) +
2517                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2518                            lan743x_csr_read(adapter,
2519                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2520                            lan743x_csr_read(adapter,
2521                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2522         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2523                            lan743x_csr_read(adapter,
2524                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2525                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2526         stats->rx_dropped = lan743x_csr_read(adapter,
2527                                              STAT_RX_DROPPED_FRAMES);
2528         stats->tx_dropped = lan743x_csr_read(adapter,
2529                                              STAT_TX_EXCESSIVE_COLLISION);
2530         stats->multicast = lan743x_csr_read(adapter,
2531                                             STAT_RX_MULTICAST_FRAMES) +
2532                            lan743x_csr_read(adapter,
2533                                             STAT_TX_MULTICAST_FRAMES);
2534         stats->collisions = lan743x_csr_read(adapter,
2535                                              STAT_TX_SINGLE_COLLISIONS) +
2536                             lan743x_csr_read(adapter,
2537                                              STAT_TX_MULTIPLE_COLLISIONS) +
2538                             lan743x_csr_read(adapter,
2539                                              STAT_TX_LATE_COLLISIONS);
2540 }
2541
2542 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2543                                           void *addr)
2544 {
2545         struct lan743x_adapter *adapter = netdev_priv(netdev);
2546         struct sockaddr *sock_addr = addr;
2547         int ret;
2548
2549         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2550         if (ret)
2551                 return ret;
2552         ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2553         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2554         lan743x_rfe_update_mac_address(adapter);
2555         return 0;
2556 }
2557
2558 static const struct net_device_ops lan743x_netdev_ops = {
2559         .ndo_open               = lan743x_netdev_open,
2560         .ndo_stop               = lan743x_netdev_close,
2561         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2562         .ndo_do_ioctl           = lan743x_netdev_ioctl,
2563         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2564         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2565         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2566         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2567 };
2568
2569 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2570 {
2571         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2572 }
2573
2574 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2575 {
2576         mdiobus_unregister(adapter->mdiobus);
2577 }
2578
2579 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2580 {
2581         unregister_netdev(adapter->netdev);
2582
2583         lan743x_mdiobus_cleanup(adapter);
2584         lan743x_hardware_cleanup(adapter);
2585         lan743x_pci_cleanup(adapter);
2586 }
2587
2588 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2589                                  struct pci_dev *pdev)
2590 {
2591         struct lan743x_tx *tx;
2592         int index;
2593         int ret;
2594
2595         adapter->intr.irq = adapter->pdev->irq;
2596         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2597         mutex_init(&adapter->dp_lock);
2598         ret = lan743x_mac_init(adapter);
2599         if (ret)
2600                 return ret;
2601
2602         ret = lan743x_phy_init(adapter);
2603         if (ret)
2604                 return ret;
2605
2606         lan743x_rfe_update_mac_address(adapter);
2607
2608         ret = lan743x_dmac_init(adapter);
2609         if (ret)
2610                 return ret;
2611
2612         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2613                 adapter->rx[index].adapter = adapter;
2614                 adapter->rx[index].channel_number = index;
2615         }
2616
2617         tx = &adapter->tx[0];
2618         tx->adapter = adapter;
2619         tx->channel_number = 0;
2620         spin_lock_init(&tx->ring_lock);
2621         return 0;
2622 }
2623
2624 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2625 {
2626         int ret;
2627
2628         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2629         if (!(adapter->mdiobus)) {
2630                 ret = -ENOMEM;
2631                 goto return_error;
2632         }
2633
2634         adapter->mdiobus->priv = (void *)adapter;
2635         adapter->mdiobus->read = lan743x_mdiobus_read;
2636         adapter->mdiobus->write = lan743x_mdiobus_write;
2637         adapter->mdiobus->name = "lan743x-mdiobus";
2638         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2639                  "pci-%s", pci_name(adapter->pdev));
2640
2641         /* set to internal PHY id */
2642         adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2643
2644         /* register mdiobus */
2645         ret = mdiobus_register(adapter->mdiobus);
2646         if (ret < 0)
2647                 goto return_error;
2648         return 0;
2649
2650 return_error:
2651         return ret;
2652 }
2653
2654 /* lan743x_pcidev_probe - Device Initialization Routine
2655  * @pdev: PCI device information struct
2656  * @id: entry in lan743x_pci_tbl
2657  *
2658  * Returns 0 on success, negative on failure
2659  *
2660  * initializes an adapter identified by a pci_dev structure.
2661  * The OS initialization, configuring of the adapter private structure,
2662  * and a hardware reset occur.
2663  **/
2664 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2665                                 const struct pci_device_id *id)
2666 {
2667         struct lan743x_adapter *adapter = NULL;
2668         struct net_device *netdev = NULL;
2669         int ret = -ENODEV;
2670
2671         netdev = devm_alloc_etherdev(&pdev->dev,
2672                                      sizeof(struct lan743x_adapter));
2673         if (!netdev)
2674                 goto return_error;
2675
2676         SET_NETDEV_DEV(netdev, &pdev->dev);
2677         pci_set_drvdata(pdev, netdev);
2678         adapter = netdev_priv(netdev);
2679         adapter->netdev = netdev;
2680         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2681                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
2682                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2683         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2684
2685         ret = lan743x_pci_init(adapter, pdev);
2686         if (ret)
2687                 goto return_error;
2688
2689         ret = lan743x_csr_init(adapter);
2690         if (ret)
2691                 goto cleanup_pci;
2692
2693         ret = lan743x_hardware_init(adapter, pdev);
2694         if (ret)
2695                 goto cleanup_pci;
2696
2697         ret = lan743x_mdiobus_init(adapter);
2698         if (ret)
2699                 goto cleanup_hardware;
2700
2701         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2702         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2703         adapter->netdev->hw_features = adapter->netdev->features;
2704
2705         /* carrier off reporting is important to ethtool even BEFORE open */
2706         netif_carrier_off(netdev);
2707
2708         ret = register_netdev(adapter->netdev);
2709         if (ret < 0)
2710                 goto cleanup_mdiobus;
2711         return 0;
2712
2713 cleanup_mdiobus:
2714         lan743x_mdiobus_cleanup(adapter);
2715
2716 cleanup_hardware:
2717         lan743x_hardware_cleanup(adapter);
2718
2719 cleanup_pci:
2720         lan743x_pci_cleanup(adapter);
2721
2722 return_error:
2723         pr_warn("Initialization failed\n");
2724         return ret;
2725 }
2726
2727 /**
2728  * lan743x_pcidev_remove - Device Removal Routine
2729  * @pdev: PCI device information struct
2730  *
2731  * this is called by the PCI subsystem to alert the driver
2732  * that it should release a PCI device.  This could be caused by a
2733  * Hot-Plug event, or because the driver is going to be removed from
2734  * memory.
2735  **/
2736 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2737 {
2738         struct net_device *netdev = pci_get_drvdata(pdev);
2739         struct lan743x_adapter *adapter = netdev_priv(netdev);
2740
2741         lan743x_full_cleanup(adapter);
2742 }
2743
2744 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2745 {
2746         struct net_device *netdev = pci_get_drvdata(pdev);
2747         struct lan743x_adapter *adapter = netdev_priv(netdev);
2748
2749         rtnl_lock();
2750         netif_device_detach(netdev);
2751
2752         /* close netdev when netdev is at running state.
2753          * For instance, it is true when system goes to sleep by pm-suspend
2754          * However, it is false when system goes to sleep by suspend GUI menu
2755          */
2756         if (netif_running(netdev))
2757                 lan743x_netdev_close(netdev);
2758         rtnl_unlock();
2759
2760         /* clean up lan743x portion */
2761         lan743x_hardware_cleanup(adapter);
2762 }
2763
2764 static const struct pci_device_id lan743x_pcidev_tbl[] = {
2765         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
2766         { 0, }
2767 };
2768
2769 static struct pci_driver lan743x_pcidev_driver = {
2770         .name     = DRIVER_NAME,
2771         .id_table = lan743x_pcidev_tbl,
2772         .probe    = lan743x_pcidev_probe,
2773         .remove   = lan743x_pcidev_remove,
2774         .shutdown = lan743x_pcidev_shutdown,
2775 };
2776
2777 module_pci_driver(lan743x_pcidev_driver);
2778
2779 MODULE_AUTHOR(DRIVER_AUTHOR);
2780 MODULE_DESCRIPTION(DRIVER_DESC);
2781 MODULE_LICENSE("GPL");