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 <linux/crc16.h>
  15 #include "lan743x_main.h"
  16 #include "lan743x_ethtool.h"
  17
  18 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  19 {
  20         pci_release_selected_regions(adapter->pdev,
  21                                      pci_select_bars(adapter->pdev,
  22                                                      IORESOURCE_MEM));
  23         pci_disable_device(adapter->pdev);
  24 }
  25
  26 static int lan743x_pci_init(struct lan743x_adapter *adapter,
  27                             struct pci_dev *pdev)
  28 {
  29         unsigned long bars = 0;
  30         int ret;
  31
  32         adapter->pdev = pdev;
  33         ret = pci_enable_device_mem(pdev);
  34         if (ret)
  35                 goto return_error;
  36
  37         netif_info(adapter, probe, adapter->netdev,
  38                    "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
  39                    pdev->vendor, pdev->device);
  40         bars = pci_select_bars(pdev, IORESOURCE_MEM);
  41         if (!test_bit(0, &bars))
  42                 goto disable_device;
  43
  44         ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
  45         if (ret)
  46                 goto disable_device;
  47
  48         pci_set_master(pdev);
  49         return 0;
  50
  51 disable_device:
  52         pci_disable_device(adapter->pdev);
  53
  54 return_error:
  55         return ret;
  56 }
  57
  58 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
  59 {
  60         return ioread32(&adapter->csr.csr_address[offset]);
  61 }
  62
  63 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
  64                        u32 data)
  65 {
  66         iowrite32(data, &adapter->csr.csr_address[offset]);
  67 }
  68
  69 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
  70
  71 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
  72 {
  73         u32 data;
  74
  75         data = lan743x_csr_read(adapter, HW_CFG);
  76         data |= HW_CFG_LRST_;
  77         lan743x_csr_write(adapter, HW_CFG, data);
  78
  79         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
  80                                   !(data & HW_CFG_LRST_), 100000, 10000000);
  81 }
  82
  83 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
  84                                     int offset, u32 bit_mask,
  85                                     int target_value, int usleep_min,
  86                                     int usleep_max, int count)
  87 {
  88         u32 data;
  89
  90         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
  91                                   target_value == ((data & bit_mask) ? 1 : 0),
  92                                   usleep_max, usleep_min * count);
  93 }
  94
  95 static int lan743x_csr_init(struct lan743x_adapter *adapter)
  96 {
  97         struct lan743x_csr *csr = &adapter->csr;
  98         resource_size_t bar_start, bar_length;
  99         int result;
 100
 101         bar_start = pci_resource_start(adapter->pdev, 0);
 102         bar_length = pci_resource_len(adapter->pdev, 0);
 103         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 104                                         bar_start, bar_length);
 105         if (!csr->csr_address) {
 106                 result = -ENOMEM;
 107                 goto clean_up;
 108         }
 109
 110         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 111         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 112         netif_info(adapter, probe, adapter->netdev,
 113                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 114                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 115                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 116         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 117                 result = -ENODEV;
 118                 goto clean_up;
 119         }
 120
 121         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 122         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 123         case ID_REV_CHIP_REV_A0_:
 124                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 125                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 126                 break;
 127         case ID_REV_CHIP_REV_B0_:
 128                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 129                 break;
 130         }
 131
 132         result = lan743x_csr_light_reset(adapter);
 133         if (result)
 134                 goto clean_up;
 135         return 0;
 136 clean_up:
 137         return result;
 138 }
 139
 140 static void lan743x_intr_software_isr(void *context)
 141 {
 142         struct lan743x_adapter *adapter = context;
 143         struct lan743x_intr *intr = &adapter->intr;
 144         u32 int_sts;
 145
 146         int_sts = lan743x_csr_read(adapter, INT_STS);
 147         if (int_sts & INT_BIT_SW_GP_) {
 148                 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
 149                 intr->software_isr_flag = 1;
 150         }
 151 }
 152
 153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 154 {
 155         struct lan743x_tx *tx = context;
 156         struct lan743x_adapter *adapter = tx->adapter;
 157         bool enable_flag = true;
 158         u32 int_en = 0;
 159
 160         int_en = lan743x_csr_read(adapter, INT_EN_SET);
 161         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 162                 lan743x_csr_write(adapter, INT_EN_CLR,
 163                                   INT_BIT_DMA_TX_(tx->channel_number));
 164         }
 165
 166         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 167                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 168                 u32 dmac_int_sts;
 169                 u32 dmac_int_en;
 170
 171                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 172                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 173                 else
 174                         dmac_int_sts = ioc_bit;
 175                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 176                         dmac_int_en = lan743x_csr_read(adapter,
 177                                                        DMAC_INT_EN_SET);
 178                 else
 179                         dmac_int_en = ioc_bit;
 180
 181                 dmac_int_en &= ioc_bit;
 182                 dmac_int_sts &= dmac_int_en;
 183                 if (dmac_int_sts & ioc_bit) {
 184                         napi_schedule(&tx->napi);
 185                         enable_flag = false;/* poll func will enable later */
 186                 }
 187         }
 188
 189         if (enable_flag)
 190                 /* enable isr */
 191                 lan743x_csr_write(adapter, INT_EN_SET,
 192                                   INT_BIT_DMA_TX_(tx->channel_number));
 193 }
 194
 195 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 196 {
 197         struct lan743x_rx *rx = context;
 198         struct lan743x_adapter *adapter = rx->adapter;
 199         bool enable_flag = true;
 200
 201         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 202                 lan743x_csr_write(adapter, INT_EN_CLR,
 203                                   INT_BIT_DMA_RX_(rx->channel_number));
 204         }
 205
 206         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 207                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 208                 u32 dmac_int_sts;
 209                 u32 dmac_int_en;
 210
 211                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 212                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 213                 else
 214                         dmac_int_sts = rx_frame_bit;
 215                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 216                         dmac_int_en = lan743x_csr_read(adapter,
 217                                                        DMAC_INT_EN_SET);
 218                 else
 219                         dmac_int_en = rx_frame_bit;
 220
 221                 dmac_int_en &= rx_frame_bit;
 222                 dmac_int_sts &= dmac_int_en;
 223                 if (dmac_int_sts & rx_frame_bit) {
 224                         napi_schedule(&rx->napi);
 225                         enable_flag = false;/* poll funct will enable later */
 226                 }
 227         }
 228
 229         if (enable_flag) {
 230                 /* enable isr */
 231                 lan743x_csr_write(adapter, INT_EN_SET,
 232                                   INT_BIT_DMA_RX_(rx->channel_number));
 233         }
 234 }
 235
 236 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 237 {
 238         struct lan743x_adapter *adapter = context;
 239         unsigned int channel;
 240
 241         if (int_sts & INT_BIT_ALL_RX_) {
 242                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 243                         channel++) {
 244                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 245
 246                         if (int_sts & int_bit) {
 247                                 lan743x_rx_isr(&adapter->rx[channel],
 248                                                int_bit, flags);
 249                                 int_sts &= ~int_bit;
 250                         }
 251                 }
 252         }
 253         if (int_sts & INT_BIT_ALL_TX_) {
 254                 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
 255                         channel++) {
 256                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 257
 258                         if (int_sts & int_bit) {
 259                                 lan743x_tx_isr(&adapter->tx[channel],
 260                                                int_bit, flags);
 261                                 int_sts &= ~int_bit;
 262                         }
 263                 }
 264         }
 265         if (int_sts & INT_BIT_ALL_OTHER_) {
 266                 if (int_sts & INT_BIT_SW_GP_) {
 267                         lan743x_intr_software_isr(adapter);
 268                         int_sts &= ~INT_BIT_SW_GP_;
 269                 }
 270                 if (int_sts & INT_BIT_1588_) {
 271                         lan743x_ptp_isr(adapter);
 272                         int_sts &= ~INT_BIT_1588_;
 273                 }
 274         }
 275         if (int_sts)
 276                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 277 }
 278
 279 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 280 {
 281         struct lan743x_vector *vector = ptr;
 282         struct lan743x_adapter *adapter = vector->adapter;
 283         irqreturn_t result = IRQ_NONE;
 284         u32 int_enables;
 285         u32 int_sts;
 286
 287         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 288                 int_sts = lan743x_csr_read(adapter, INT_STS);
 289         } else if (vector->flags &
 290                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 291                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 292                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 293         } else {
 294                 /* use mask as implied status */
 295                 int_sts = vector->int_mask | INT_BIT_MAS_;
 296         }
 297
 298         if (!(int_sts & INT_BIT_MAS_))
 299                 goto irq_done;
 300
 301         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 302                 /* disable vector interrupt */
 303                 lan743x_csr_write(adapter,
 304                                   INT_VEC_EN_CLR,
 305                                   INT_VEC_EN_(vector->vector_index));
 306
 307         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 308                 /* disable master interrupt */
 309                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 310
 311         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 312                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 313         } else {
 314                 /*  use vector mask as implied enable mask */
 315                 int_enables = vector->int_mask;
 316         }
 317
 318         int_sts &= int_enables;
 319         int_sts &= vector->int_mask;
 320         if (int_sts) {
 321                 if (vector->handler) {
 322                         vector->handler(vector->context,
 323                                         int_sts, vector->flags);
 324                 } else {
 325                         /* disable interrupts on this vector */
 326                         lan743x_csr_write(adapter, INT_EN_CLR,
 327                                           vector->int_mask);
 328                 }
 329                 result = IRQ_HANDLED;
 330         }
 331
 332         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 333                 /* enable master interrupt */
 334                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 335
 336         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 337                 /* enable vector interrupt */
 338                 lan743x_csr_write(adapter,
 339                                   INT_VEC_EN_SET,
 340                                   INT_VEC_EN_(vector->vector_index));
 341 irq_done:
 342         return result;
 343 }
 344
 345 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 346 {
 347         struct lan743x_intr *intr = &adapter->intr;
 348         int result = -ENODEV;
 349         int timeout = 10;
 350
 351         intr->software_isr_flag = 0;
 352
 353         /* enable interrupt */
 354         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 355
 356         /* activate interrupt here */
 357         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 358         while ((timeout > 0) && (!(intr->software_isr_flag))) {
 359                 usleep_range(1000, 20000);
 360                 timeout--;
 361         }
 362
 363         if (intr->software_isr_flag)
 364                 result = 0;
 365
 366         /* disable interrupts */
 367         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 368         return result;
 369 }
 370
 371 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 372                                      int vector_index, u32 flags,
 373                                      u32 int_mask,
 374                                      lan743x_vector_handler handler,
 375                                      void *context)
 376 {
 377         struct lan743x_vector *vector = &adapter->intr.vector_list
 378                                         [vector_index];
 379         int ret;
 380
 381         vector->adapter = adapter;
 382         vector->flags = flags;
 383         vector->vector_index = vector_index;
 384         vector->int_mask = int_mask;
 385         vector->handler = handler;
 386         vector->context = context;
 387
 388         ret = request_irq(vector->irq,
 389                           lan743x_intr_entry_isr,
 390                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 391                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 392         if (ret) {
 393                 vector->handler = NULL;
 394                 vector->context = NULL;
 395                 vector->int_mask = 0;
 396                 vector->flags = 0;
 397         }
 398         return ret;
 399 }
 400
 401 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 402                                         int vector_index)
 403 {
 404         struct lan743x_vector *vector = &adapter->intr.vector_list
 405                                         [vector_index];
 406
 407         free_irq(vector->irq, vector);
 408         vector->handler = NULL;
 409         vector->context = NULL;
 410         vector->int_mask = 0;
 411         vector->flags = 0;
 412 }
 413
 414 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 415                                          u32 int_mask)
 416 {
 417         int index;
 418
 419         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 420                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 421                         return adapter->intr.vector_list[index].flags;
 422         }
 423         return 0;
 424 }
 425
 426 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 427 {
 428         struct lan743x_intr *intr = &adapter->intr;
 429         int index = 0;
 430
 431         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 432         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 433
 434         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 435                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 436                         lan743x_intr_unregister_isr(adapter, index);
 437                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 438                 }
 439         }
 440
 441         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 442                 pci_disable_msi(adapter->pdev);
 443                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 444         }
 445
 446         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 447                 pci_disable_msix(adapter->pdev);
 448                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 449         }
 450 }
 451
 452 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 453 {
 454         struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
 455         struct lan743x_intr *intr = &adapter->intr;
 456         u32 int_vec_en_auto_clr = 0;
 457         u32 int_vec_map0 = 0;
 458         u32 int_vec_map1 = 0;
 459         int ret = -ENODEV;
 460         int index = 0;
 461         u32 flags = 0;
 462
 463         intr->number_of_vectors = 0;
 464
 465         /* Try to set up MSIX interrupts */
 466         memset(&msix_entries[0], 0,
 467                sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
 468         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
 469                 msix_entries[index].entry = index;
 470         ret = pci_enable_msix_range(adapter->pdev,
 471                                     msix_entries, 1,
 472                                     1 + LAN743X_USED_TX_CHANNELS +
 473                                     LAN743X_USED_RX_CHANNELS);
 474
 475         if (ret > 0) {
 476                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 477                 intr->number_of_vectors = ret;
 478                 intr->using_vectors = true;
 479                 for (index = 0; index < intr->number_of_vectors; index++)
 480                         intr->vector_list[index].irq = msix_entries
 481                                                        [index].vector;
 482                 netif_info(adapter, ifup, adapter->netdev,
 483                            "using MSIX interrupts, number of vectors = %d\n",
 484                            intr->number_of_vectors);
 485         }
 486
 487         /* If MSIX failed try to setup using MSI interrupts */
 488         if (!intr->number_of_vectors) {
 489                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 490                         if (!pci_enable_msi(adapter->pdev)) {
 491                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 492                                 intr->number_of_vectors = 1;
 493                                 intr->using_vectors = true;
 494                                 intr->vector_list[0].irq =
 495                                         adapter->pdev->irq;
 496                                 netif_info(adapter, ifup, adapter->netdev,
 497                                            "using MSI interrupts, number of vectors = %d\n",
 498                                            intr->number_of_vectors);
 499                         }
 500                 }
 501         }
 502
 503         /* If MSIX, and MSI failed, setup using legacy interrupt */
 504         if (!intr->number_of_vectors) {
 505                 intr->number_of_vectors = 1;
 506                 intr->using_vectors = false;
 507                 intr->vector_list[0].irq = intr->irq;
 508                 netif_info(adapter, ifup, adapter->netdev,
 509                            "using legacy interrupts\n");
 510         }
 511
 512         /* At this point we must have at least one irq */
 513         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 514
 515         /* map all interrupts to vector 0 */
 516         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 517         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 518         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 519         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 520                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 521                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 522                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 523
 524         if (intr->using_vectors) {
 525                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 526                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 527         } else {
 528                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 529                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 530                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 531         }
 532
 533         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 534                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 535                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 536                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 537                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 538                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 539                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 540         }
 541
 542         ret = lan743x_intr_register_isr(adapter, 0, flags,
 543                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 544                                         INT_BIT_ALL_OTHER_,
 545                                         lan743x_intr_shared_isr, adapter);
 546         if (ret)
 547                 goto clean_up;
 548         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 549
 550         if (intr->using_vectors)
 551                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 552                                   INT_VEC_EN_(0));
 553
 554         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 555                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 556                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 557                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 558                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 559                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 560                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 561                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 562                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 563                 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 564                 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 565                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 566         }
 567
 568         /* enable interrupts */
 569         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 570         ret = lan743x_intr_test_isr(adapter);
 571         if (ret)
 572                 goto clean_up;
 573
 574         if (intr->number_of_vectors > 1) {
 575                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 576
 577                 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
 578                         number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
 579                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 580                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 581                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 582                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 583                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 584                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 585
 586                 if (adapter->csr.flags &
 587                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 588                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 589                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 590                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 591                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 592                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 593                 }
 594
 595                 for (index = 0; index < number_of_tx_vectors; index++) {
 596                         u32 int_bit = INT_BIT_DMA_TX_(index);
 597                         int vector = index + 1;
 598
 599                         /* map TX interrupt to vector */
 600                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 601                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 602                         if (flags &
 603                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 604                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 605                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 606                                                   int_vec_en_auto_clr);
 607                         }
 608
 609                         /* Remove TX interrupt from shared mask */
 610                         intr->vector_list[0].int_mask &= ~int_bit;
 611                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 612                                                         int_bit, lan743x_tx_isr,
 613                                                         &adapter->tx[index]);
 614                         if (ret)
 615                                 goto clean_up;
 616                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 617                         if (!(flags &
 618                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 619                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 620                                                   INT_VEC_EN_(vector));
 621                 }
 622         }
 623         if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
 624                 int number_of_rx_vectors = intr->number_of_vectors -
 625                                            LAN743X_USED_TX_CHANNELS - 1;
 626
 627                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 628                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 629
 630                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 631                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 632                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 633                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 634                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 635                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 636
 637                 if (adapter->csr.flags &
 638                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 639                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 640                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 641                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 642                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 643                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 644                 }
 645                 for (index = 0; index < number_of_rx_vectors; index++) {
 646                         int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
 647                         u32 int_bit = INT_BIT_DMA_RX_(index);
 648
 649                         /* map RX interrupt to vector */
 650                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 651                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 652                         if (flags &
 653                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 654                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 655                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 656                                                   int_vec_en_auto_clr);
 657                         }
 658
 659                         /* Remove RX interrupt from shared mask */
 660                         intr->vector_list[0].int_mask &= ~int_bit;
 661                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 662                                                         int_bit, lan743x_rx_isr,
 663                                                         &adapter->rx[index]);
 664                         if (ret)
 665                                 goto clean_up;
 666                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 667
 668                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 669                                           INT_VEC_EN_(vector));
 670                 }
 671         }
 672         return 0;
 673
 674 clean_up:
 675         lan743x_intr_close(adapter);
 676         return ret;
 677 }
 678
 679 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 680                             u32 select, u32 addr, u32 length, u32 *buf)
 681 {
 682         int ret = -EIO;
 683         u32 dp_sel;
 684         int i;
 685
 686         mutex_lock(&adapter->dp_lock);
 687         if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 688                                      1, 40, 100, 100))
 689                 goto unlock;
 690         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 691         dp_sel &= ~DP_SEL_MASK_;
 692         dp_sel |= select;
 693         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 694
 695         for (i = 0; i < length; i++) {
 696                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 697                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 698                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 699                 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 700                                              1, 40, 100, 100))
 701                         goto unlock;
 702         }
 703         ret = 0;
 704
 705 unlock:
 706         mutex_unlock(&adapter->dp_lock);
 707         return ret;
 708 }
 709
 710 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 711 {
 712         u32 ret;
 713
 714         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 715                 MAC_MII_ACC_PHY_ADDR_MASK_;
 716         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 717                 MAC_MII_ACC_MIIRINDA_MASK_;
 718
 719         if (read)
 720                 ret |= MAC_MII_ACC_MII_READ_;
 721         else
 722                 ret |= MAC_MII_ACC_MII_WRITE_;
 723         ret |= MAC_MII_ACC_MII_BUSY_;
 724
 725         return ret;
 726 }
 727
 728 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 729 {
 730         u32 data;
 731
 732         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 733                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 734 }
 735
 736 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 737 {
 738         struct lan743x_adapter *adapter = bus->priv;
 739         u32 val, mii_access;
 740         int ret;
 741
 742         /* comfirm MII not busy */
 743         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 744         if (ret < 0)
 745                 return ret;
 746
 747         /* set the address, index & direction (read from PHY) */
 748         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 749         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 750         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 751         if (ret < 0)
 752                 return ret;
 753
 754         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 755         return (int)(val & 0xFFFF);
 756 }
 757
 758 static int lan743x_mdiobus_write(struct mii_bus *bus,
 759                                  int phy_id, int index, u16 regval)
 760 {
 761         struct lan743x_adapter *adapter = bus->priv;
 762         u32 val, mii_access;
 763         int ret;
 764
 765         /* confirm MII not busy */
 766         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 767         if (ret < 0)
 768                 return ret;
 769         val = (u32)regval;
 770         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 771
 772         /* set the address, index & direction (write to PHY) */
 773         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 774         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 775         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 776         return ret;
 777 }
 778
 779 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 780                                     u8 *addr)
 781 {
 782         u32 addr_lo, addr_hi;
 783
 784         addr_lo = addr[0] |
 785                 addr[1] << 8 |
 786                 addr[2] << 16 |
 787                 addr[3] << 24;
 788         addr_hi = addr[4] |
 789                 addr[5] << 8;
 790         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 791         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 792
 793         ether_addr_copy(adapter->mac_address, addr);
 794         netif_info(adapter, drv, adapter->netdev,
 795                    "MAC address set to %pM\n", addr);
 796 }
 797
 798 static int lan743x_mac_init(struct lan743x_adapter *adapter)
 799 {
 800         bool mac_address_valid = true;
 801         struct net_device *netdev;
 802         u32 mac_addr_hi = 0;
 803         u32 mac_addr_lo = 0;
 804         u32 data;
 805
 806         netdev = adapter->netdev;
 807
 808         /* setup auto duplex, and speed detection */
 809         data = lan743x_csr_read(adapter, MAC_CR);
 810         data |= MAC_CR_ADD_ | MAC_CR_ASD_;
 811         data |= MAC_CR_CNTR_RST_;
 812         lan743x_csr_write(adapter, MAC_CR, data);
 813
 814         mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 815         mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 816         adapter->mac_address[0] = mac_addr_lo & 0xFF;
 817         adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 818         adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 819         adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 820         adapter->mac_address[4] = mac_addr_hi & 0xFF;
 821         adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 822
 823         if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 824             mac_addr_lo == 0xFFFFFFFF) {
 825                 mac_address_valid = false;
 826         } else if (!is_valid_ether_addr(adapter->mac_address)) {
 827                 mac_address_valid = false;
 828         }
 829
 830         if (!mac_address_valid)
 831                 eth_random_addr(adapter->mac_address);
 832         lan743x_mac_set_address(adapter, adapter->mac_address);
 833         ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 834         return 0;
 835 }
 836
 837 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 838 {
 839         int ret = 0;
 840         u32 temp;
 841
 842         temp = lan743x_csr_read(adapter, MAC_RX);
 843         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 844         temp = lan743x_csr_read(adapter, MAC_TX);
 845         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 846         return ret;
 847 }
 848
 849 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 850 {
 851         u32 temp;
 852
 853         temp = lan743x_csr_read(adapter, MAC_TX);
 854         temp &= ~MAC_TX_TXEN_;
 855         lan743x_csr_write(adapter, MAC_TX, temp);
 856         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 857                                  1, 1000, 20000, 100);
 858
 859         temp = lan743x_csr_read(adapter, MAC_RX);
 860         temp &= ~MAC_RX_RXEN_;
 861         lan743x_csr_write(adapter, MAC_RX, temp);
 862         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 863                                  1, 1000, 20000, 100);
 864 }
 865
 866 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 867                                               bool tx_enable, bool rx_enable)
 868 {
 869         u32 flow_setting = 0;
 870
 871         /* set maximum pause time because when fifo space frees
 872          * up a zero value pause frame will be sent to release the pause
 873          */
 874         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 875         if (tx_enable)
 876                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 877         if (rx_enable)
 878                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 879         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 880 }
 881
 882 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 883 {
 884         int enabled = 0;
 885         u32 mac_rx = 0;
 886
 887         mac_rx = lan743x_csr_read(adapter, MAC_RX);
 888         if (mac_rx & MAC_RX_RXEN_) {
 889                 enabled = 1;
 890                 if (mac_rx & MAC_RX_RXD_) {
 891                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 892                         mac_rx &= ~MAC_RX_RXD_;
 893                 }
 894                 mac_rx &= ~MAC_RX_RXEN_;
 895                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 896                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 897                                          1, 1000, 20000, 100);
 898                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 899         }
 900
 901         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 902         mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
 903                   MAC_RX_MAX_SIZE_MASK_);
 904         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 905
 906         if (enabled) {
 907                 mac_rx |= MAC_RX_RXEN_;
 908                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 909         }
 910         return 0;
 911 }
 912
 913 /* PHY */
 914 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 915 {
 916         u32 data;
 917
 918         /* Only called with in probe, and before mdiobus_register */
 919
 920         data = lan743x_csr_read(adapter, PMT_CTL);
 921         data |= PMT_CTL_ETH_PHY_RST_;
 922         lan743x_csr_write(adapter, PMT_CTL, data);
 923
 924         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 925                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
 926                                   (data & PMT_CTL_READY_)),
 927                                   50000, 1000000);
 928 }
 929
 930 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 931                                            u8 duplex, u16 local_adv,
 932                                            u16 remote_adv)
 933 {
 934         struct lan743x_phy *phy = &adapter->phy;
 935         u8 cap;
 936
 937         if (phy->fc_autoneg)
 938                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 939         else
 940                 cap = phy->fc_request_control;
 941
 942         lan743x_mac_flow_ctrl_set_enables(adapter,
 943                                           cap & FLOW_CTRL_TX,
 944                                           cap & FLOW_CTRL_RX);
 945 }
 946
 947 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 948 {
 949         return lan743x_phy_reset(adapter);
 950 }
 951
 952 static void lan743x_phy_link_status_change(struct net_device *netdev)
 953 {
 954         struct lan743x_adapter *adapter = netdev_priv(netdev);
 955         struct phy_device *phydev = netdev->phydev;
 956
 957         phy_print_status(phydev);
 958         if (phydev->state == PHY_RUNNING) {
 959                 struct ethtool_link_ksettings ksettings;
 960                 int remote_advertisement = 0;
 961                 int local_advertisement = 0;
 962
 963                 memset(&ksettings, 0, sizeof(ksettings));
 964                 phy_ethtool_get_link_ksettings(netdev, &ksettings);
 965                 local_advertisement =
 966                         linkmode_adv_to_mii_adv_t(phydev->advertising);
 967                 remote_advertisement =
 968                         linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
 969
 970                 lan743x_phy_update_flowcontrol(adapter,
 971                                                ksettings.base.duplex,
 972                                                local_advertisement,
 973                                                remote_advertisement);
 974                 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
 975         }
 976 }
 977
 978 static void lan743x_phy_close(struct lan743x_adapter *adapter)
 979 {
 980         struct net_device *netdev = adapter->netdev;
 981
 982         phy_stop(netdev->phydev);
 983         phy_disconnect(netdev->phydev);
 984         netdev->phydev = NULL;
 985 }
 986
 987 static int lan743x_phy_open(struct lan743x_adapter *adapter)
 988 {
 989         struct lan743x_phy *phy = &adapter->phy;
 990         struct phy_device *phydev;
 991         struct net_device *netdev;
 992         int ret = -EIO;
 993
 994         netdev = adapter->netdev;
 995         phydev = phy_find_first(adapter->mdiobus);
 996         if (!phydev)
 997                 goto return_error;
 998
 999         ret = phy_connect_direct(netdev, phydev,
1000                                  lan743x_phy_link_status_change,
1001                                  PHY_INTERFACE_MODE_GMII);
1002         if (ret)
1003                 goto return_error;
1004
1005         /* MAC doesn't support 1000T Half */
1006         phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1007
1008         /* support both flow controls */
1009         phy_support_asym_pause(phydev);
1010         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1011         phy->fc_autoneg = phydev->autoneg;
1012
1013         phy_start(phydev);
1014         phy_start_aneg(phydev);
1015         return 0;
1016
1017 return_error:
1018         return ret;
1019 }
1020
1021 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1022 {
1023         lan743x_csr_write(adapter, RFE_RSS_CFG,
1024                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1025                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1026                 RFE_RSS_CFG_IPV6_EX_ |
1027                 RFE_RSS_CFG_UDP_IPV6_ |
1028                 RFE_RSS_CFG_TCP_IPV6_ |
1029                 RFE_RSS_CFG_IPV6_ |
1030                 RFE_RSS_CFG_UDP_IPV4_ |
1031                 RFE_RSS_CFG_TCP_IPV4_ |
1032                 RFE_RSS_CFG_IPV4_ |
1033                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1034                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1035                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1036                 RFE_RSS_CFG_RSS_ENABLE_);
1037 }
1038
1039 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1040 {
1041         u8 *mac_addr;
1042         u32 mac_addr_hi = 0;
1043         u32 mac_addr_lo = 0;
1044
1045         /* Add mac address to perfect Filter */
1046         mac_addr = adapter->mac_address;
1047         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1048                       (((u32)(mac_addr[1])) << 8) |
1049                       (((u32)(mac_addr[2])) << 16) |
1050                       (((u32)(mac_addr[3])) << 24));
1051         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1052                       (((u32)(mac_addr[5])) << 8));
1053
1054         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1055         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1056                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1057 }
1058
1059 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1060 {
1061         struct net_device *netdev = adapter->netdev;
1062         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1063         u32 rfctl;
1064         u32 data;
1065
1066         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1067         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1068                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1069         rfctl |= RFE_CTL_AB_;
1070         if (netdev->flags & IFF_PROMISC) {
1071                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1072         } else {
1073                 if (netdev->flags & IFF_ALLMULTI)
1074                         rfctl |= RFE_CTL_AM_;
1075         }
1076
1077         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1078         if (netdev_mc_count(netdev)) {
1079                 struct netdev_hw_addr *ha;
1080                 int i;
1081
1082                 rfctl |= RFE_CTL_DA_PERFECT_;
1083                 i = 1;
1084                 netdev_for_each_mc_addr(ha, netdev) {
1085                         /* set first 32 into Perfect Filter */
1086                         if (i < 33) {
1087                                 lan743x_csr_write(adapter,
1088                                                   RFE_ADDR_FILT_HI(i), 0);
1089                                 data = ha->addr[3];
1090                                 data = ha->addr[2] | (data << 8);
1091                                 data = ha->addr[1] | (data << 8);
1092                                 data = ha->addr[0] | (data << 8);
1093                                 lan743x_csr_write(adapter,
1094                                                   RFE_ADDR_FILT_LO(i), data);
1095                                 data = ha->addr[5];
1096                                 data = ha->addr[4] | (data << 8);
1097                                 data |= RFE_ADDR_FILT_HI_VALID_;
1098                                 lan743x_csr_write(adapter,
1099                                                   RFE_ADDR_FILT_HI(i), data);
1100                         } else {
1101                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1102                                              23) & 0x1FF;
1103                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1104                                 rfctl |= RFE_CTL_MCAST_HASH_;
1105                         }
1106                         i++;
1107                 }
1108         }
1109
1110         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1111                          DP_SEL_VHF_VLAN_LEN,
1112                          DP_SEL_VHF_HASH_LEN, hash_table);
1113         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1114 }
1115
1116 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1117 {
1118         u32 data = 0;
1119
1120         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1121         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1122                                  0, 1000, 20000, 100);
1123         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1124         case DMA_DESCRIPTOR_SPACING_16:
1125                 data = DMAC_CFG_MAX_DSPACE_16_;
1126                 break;
1127         case DMA_DESCRIPTOR_SPACING_32:
1128                 data = DMAC_CFG_MAX_DSPACE_32_;
1129                 break;
1130         case DMA_DESCRIPTOR_SPACING_64:
1131                 data = DMAC_CFG_MAX_DSPACE_64_;
1132                 break;
1133         case DMA_DESCRIPTOR_SPACING_128:
1134                 data = DMAC_CFG_MAX_DSPACE_128_;
1135                 break;
1136         default:
1137                 return -EPERM;
1138         }
1139         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1140                 data |= DMAC_CFG_COAL_EN_;
1141         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1142         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1143         lan743x_csr_write(adapter, DMAC_CFG, data);
1144         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1145         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1146         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1147         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1148         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1149         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1150         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1151         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1152         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1153         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1154         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1155         return 0;
1156 }
1157
1158 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1159                                      int tx_channel)
1160 {
1161         u32 dmac_cmd = 0;
1162
1163         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1164         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1165                                       DMAC_CMD_START_T_(tx_channel)),
1166                                       (dmac_cmd &
1167                                       DMAC_CMD_STOP_T_(tx_channel)));
1168 }
1169
1170 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1171                                              int tx_channel)
1172 {
1173         int timeout = 100;
1174         int result = 0;
1175
1176         while (timeout &&
1177                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1178                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1179                 usleep_range(1000, 20000);
1180                 timeout--;
1181         }
1182         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1183                 result = -ENODEV;
1184         return result;
1185 }
1186
1187 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1188                                      int rx_channel)
1189 {
1190         u32 dmac_cmd = 0;
1191
1192         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1193         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1194                                       DMAC_CMD_START_R_(rx_channel)),
1195                                       (dmac_cmd &
1196                                       DMAC_CMD_STOP_R_(rx_channel)));
1197 }
1198
1199 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1200                                              int rx_channel)
1201 {
1202         int timeout = 100;
1203         int result = 0;
1204
1205         while (timeout &&
1206                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1207                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1208                 usleep_range(1000, 20000);
1209                 timeout--;
1210         }
1211         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1212                 result = -ENODEV;
1213         return result;
1214 }
1215
1216 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1217                                     int descriptor_index, bool cleanup)
1218 {
1219         struct lan743x_tx_buffer_info *buffer_info = NULL;
1220         struct lan743x_tx_descriptor *descriptor = NULL;
1221         u32 descriptor_type = 0;
1222         bool ignore_sync;
1223
1224         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1225         buffer_info = &tx->buffer_info[descriptor_index];
1226         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1227                 goto done;
1228
1229         descriptor_type = (descriptor->data0) &
1230                           TX_DESC_DATA0_DTYPE_MASK_;
1231         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1232                 goto clean_up_data_descriptor;
1233         else
1234                 goto clear_active;
1235
1236 clean_up_data_descriptor:
1237         if (buffer_info->dma_ptr) {
1238                 if (buffer_info->flags &
1239                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1240                         dma_unmap_page(&tx->adapter->pdev->dev,
1241                                        buffer_info->dma_ptr,
1242                                        buffer_info->buffer_length,
1243                                        DMA_TO_DEVICE);
1244                 } else {
1245                         dma_unmap_single(&tx->adapter->pdev->dev,
1246                                          buffer_info->dma_ptr,
1247                                          buffer_info->buffer_length,
1248                                          DMA_TO_DEVICE);
1249                 }
1250                 buffer_info->dma_ptr = 0;
1251                 buffer_info->buffer_length = 0;
1252         }
1253         if (!buffer_info->skb)
1254                 goto clear_active;
1255
1256         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1257                 dev_kfree_skb(buffer_info->skb);
1258                 goto clear_skb;
1259         }
1260
1261         if (cleanup) {
1262                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1263                 dev_kfree_skb(buffer_info->skb);
1264         } else {
1265                 ignore_sync = (buffer_info->flags &
1266                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1267                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1268                                              buffer_info->skb, ignore_sync);
1269         }
1270
1271 clear_skb:
1272         buffer_info->skb = NULL;
1273
1274 clear_active:
1275         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1276
1277 done:
1278         memset(buffer_info, 0, sizeof(*buffer_info));
1279         memset(descriptor, 0, sizeof(*descriptor));
1280 }
1281
1282 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1283 {
1284         return ((++index) % tx->ring_size);
1285 }
1286
1287 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1288 {
1289         while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1290                 lan743x_tx_release_desc(tx, tx->last_head, false);
1291                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1292         }
1293 }
1294
1295 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1296 {
1297         u32 original_head = 0;
1298
1299         original_head = tx->last_head;
1300         do {
1301                 lan743x_tx_release_desc(tx, tx->last_head, true);
1302                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1303         } while (tx->last_head != original_head);
1304         memset(tx->ring_cpu_ptr, 0,
1305                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1306         memset(tx->buffer_info, 0,
1307                sizeof(*tx->buffer_info) * (tx->ring_size));
1308 }
1309
1310 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1311                                    struct sk_buff *skb)
1312 {
1313         int result = 1; /* 1 for the main skb buffer */
1314         int nr_frags = 0;
1315
1316         if (skb_is_gso(skb))
1317                 result++; /* requires an extension descriptor */
1318         nr_frags = skb_shinfo(skb)->nr_frags;
1319         result += nr_frags; /* 1 for each fragment buffer */
1320         return result;
1321 }
1322
1323 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1324 {
1325         int last_head = tx->last_head;
1326         int last_tail = tx->last_tail;
1327
1328         if (last_tail >= last_head)
1329                 return tx->ring_size - last_tail + last_head - 1;
1330         else
1331                 return last_head - last_tail - 1;
1332 }
1333
1334 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1335                                       bool enable_timestamping,
1336                                       bool enable_onestep_sync)
1337 {
1338         if (enable_timestamping)
1339                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1340         else
1341                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1342         if (enable_onestep_sync)
1343                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1344         else
1345                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1346 }
1347
1348 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1349                                   unsigned char *first_buffer,
1350                                   unsigned int first_buffer_length,
1351                                   unsigned int frame_length,
1352                                   bool time_stamp,
1353                                   bool check_sum)
1354 {
1355         /* called only from within lan743x_tx_xmit_frame.
1356          * assuming tx->ring_lock has already been acquired.
1357          */
1358         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1359         struct lan743x_tx_buffer_info *buffer_info = NULL;
1360         struct lan743x_adapter *adapter = tx->adapter;
1361         struct device *dev = &adapter->pdev->dev;
1362         dma_addr_t dma_ptr;
1363
1364         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1365         tx->frame_first = tx->last_tail;
1366         tx->frame_tail = tx->frame_first;
1367
1368         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1369         buffer_info = &tx->buffer_info[tx->frame_tail];
1370         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1371                                  DMA_TO_DEVICE);
1372         if (dma_mapping_error(dev, dma_ptr))
1373                 return -ENOMEM;
1374
1375         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1376         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1377         tx_descriptor->data3 = (frame_length << 16) &
1378                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1379
1380         buffer_info->skb = NULL;
1381         buffer_info->dma_ptr = dma_ptr;
1382         buffer_info->buffer_length = first_buffer_length;
1383         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1384
1385         tx->frame_data0 = (first_buffer_length &
1386                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1387                 TX_DESC_DATA0_DTYPE_DATA_ |
1388                 TX_DESC_DATA0_FS_ |
1389                 TX_DESC_DATA0_FCS_;
1390         if (time_stamp)
1391                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1392
1393         if (check_sum)
1394                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1395                                    TX_DESC_DATA0_IPE_ |
1396                                    TX_DESC_DATA0_TPE_;
1397
1398         /* data0 will be programmed in one of other frame assembler functions */
1399         return 0;
1400 }
1401
1402 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1403                                      unsigned int frame_length)
1404 {
1405         /* called only from within lan743x_tx_xmit_frame.
1406          * assuming tx->ring_lock has already been acquired.
1407          */
1408         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1409         struct lan743x_tx_buffer_info *buffer_info = NULL;
1410
1411         /* wrap up previous descriptor */
1412         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1413         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1414         tx_descriptor->data0 = tx->frame_data0;
1415
1416         /* move to next descriptor */
1417         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1418         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1419         buffer_info = &tx->buffer_info[tx->frame_tail];
1420
1421         /* add extension descriptor */
1422         tx_descriptor->data1 = 0;
1423         tx_descriptor->data2 = 0;
1424         tx_descriptor->data3 = 0;
1425
1426         buffer_info->skb = NULL;
1427         buffer_info->dma_ptr = 0;
1428         buffer_info->buffer_length = 0;
1429         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1430
1431         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1432                           TX_DESC_DATA0_DTYPE_EXT_ |
1433                           TX_DESC_DATA0_EXT_LSO_;
1434
1435         /* data0 will be programmed in one of other frame assembler functions */
1436 }
1437
1438 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1439                                          const struct skb_frag_struct *fragment,
1440                                          unsigned int frame_length)
1441 {
1442         /* called only from within lan743x_tx_xmit_frame
1443          * assuming tx->ring_lock has already been acquired
1444          */
1445         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1446         struct lan743x_tx_buffer_info *buffer_info = NULL;
1447         struct lan743x_adapter *adapter = tx->adapter;
1448         struct device *dev = &adapter->pdev->dev;
1449         unsigned int fragment_length = 0;
1450         dma_addr_t dma_ptr;
1451
1452         fragment_length = skb_frag_size(fragment);
1453         if (!fragment_length)
1454                 return 0;
1455
1456         /* wrap up previous descriptor */
1457         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1458         tx_descriptor->data0 = tx->frame_data0;
1459
1460         /* move to next descriptor */
1461         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1462         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1463         buffer_info = &tx->buffer_info[tx->frame_tail];
1464         dma_ptr = skb_frag_dma_map(dev, fragment,
1465                                    0, fragment_length,
1466                                    DMA_TO_DEVICE);
1467         if (dma_mapping_error(dev, dma_ptr)) {
1468                 int desc_index;
1469
1470                 /* cleanup all previously setup descriptors */
1471                 desc_index = tx->frame_first;
1472                 while (desc_index != tx->frame_tail) {
1473                         lan743x_tx_release_desc(tx, desc_index, true);
1474                         desc_index = lan743x_tx_next_index(tx, desc_index);
1475                 }
1476                 dma_wmb();
1477                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1478                 tx->frame_first = 0;
1479                 tx->frame_data0 = 0;
1480                 tx->frame_tail = 0;
1481                 return -ENOMEM;
1482         }
1483
1484         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1485         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1486         tx_descriptor->data3 = (frame_length << 16) &
1487                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1488
1489         buffer_info->skb = NULL;
1490         buffer_info->dma_ptr = dma_ptr;
1491         buffer_info->buffer_length = fragment_length;
1492         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1493         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1494
1495         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1496                           TX_DESC_DATA0_DTYPE_DATA_ |
1497                           TX_DESC_DATA0_FCS_;
1498
1499         /* data0 will be programmed in one of other frame assembler functions */
1500         return 0;
1501 }
1502
1503 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1504                                  struct sk_buff *skb,
1505                                  bool time_stamp,
1506                                  bool ignore_sync)
1507 {
1508         /* called only from within lan743x_tx_xmit_frame
1509          * assuming tx->ring_lock has already been acquired
1510          */
1511         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1512         struct lan743x_tx_buffer_info *buffer_info = NULL;
1513         struct lan743x_adapter *adapter = tx->adapter;
1514         u32 tx_tail_flags = 0;
1515
1516         /* wrap up previous descriptor */
1517         tx->frame_data0 |= TX_DESC_DATA0_LS_;
1518         tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1519
1520         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1521         buffer_info = &tx->buffer_info[tx->frame_tail];
1522         buffer_info->skb = skb;
1523         if (time_stamp)
1524                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1525         if (ignore_sync)
1526                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1527
1528         tx_descriptor->data0 = tx->frame_data0;
1529         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1530         tx->last_tail = tx->frame_tail;
1531
1532         dma_wmb();
1533
1534         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1535                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1536         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1537                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1538                 TX_TAIL_SET_TOP_INT_EN_;
1539
1540         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1541                           tx_tail_flags | tx->frame_tail);
1542         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1543 }
1544
1545 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1546                                          struct sk_buff *skb)
1547 {
1548         int required_number_of_descriptors = 0;
1549         unsigned int start_frame_length = 0;
1550         unsigned int frame_length = 0;
1551         unsigned int head_length = 0;
1552         unsigned long irq_flags = 0;
1553         bool do_timestamp = false;
1554         bool ignore_sync = false;
1555         int nr_frags = 0;
1556         bool gso = false;
1557         int j;
1558
1559         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1560
1561         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1562         if (required_number_of_descriptors >
1563                 lan743x_tx_get_avail_desc(tx)) {
1564                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1565                         dev_kfree_skb(skb);
1566                 } else {
1567                         /* save to overflow buffer */
1568                         tx->overflow_skb = skb;
1569                         netif_stop_queue(tx->adapter->netdev);
1570                 }
1571                 goto unlock;
1572         }
1573
1574         /* space available, transmit skb  */
1575         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1576             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1577             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1578                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1579                 do_timestamp = true;
1580                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1581                         ignore_sync = true;
1582         }
1583         head_length = skb_headlen(skb);
1584         frame_length = skb_pagelen(skb);
1585         nr_frags = skb_shinfo(skb)->nr_frags;
1586         start_frame_length = frame_length;
1587         gso = skb_is_gso(skb);
1588         if (gso) {
1589                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1590                                          (unsigned short)8);
1591         }
1592
1593         if (lan743x_tx_frame_start(tx,
1594                                    skb->data, head_length,
1595                                    start_frame_length,
1596                                    do_timestamp,
1597                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1598                 dev_kfree_skb(skb);
1599                 goto unlock;
1600         }
1601
1602         if (gso)
1603                 lan743x_tx_frame_add_lso(tx, frame_length);
1604
1605         if (nr_frags <= 0)
1606                 goto finish;
1607
1608         for (j = 0; j < nr_frags; j++) {
1609                 const struct skb_frag_struct *frag;
1610
1611                 frag = &(skb_shinfo(skb)->frags[j]);
1612                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1613                         /* upon error no need to call
1614                          *      lan743x_tx_frame_end
1615                          * frame assembler clean up was performed inside
1616                          *      lan743x_tx_frame_add_fragment
1617                          */
1618                         dev_kfree_skb(skb);
1619                         goto unlock;
1620                 }
1621         }
1622
1623 finish:
1624         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1625
1626 unlock:
1627         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1628         return NETDEV_TX_OK;
1629 }
1630
1631 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1632 {
1633         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1634         struct lan743x_adapter *adapter = tx->adapter;
1635         bool start_transmitter = false;
1636         unsigned long irq_flags = 0;
1637         u32 ioc_bit = 0;
1638         u32 int_sts = 0;
1639
1640         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1641         int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1642         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1643                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1644         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1645
1646         /* clean up tx ring */
1647         lan743x_tx_release_completed_descriptors(tx);
1648         if (netif_queue_stopped(adapter->netdev)) {
1649                 if (tx->overflow_skb) {
1650                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1651                                 lan743x_tx_get_avail_desc(tx))
1652                                 start_transmitter = true;
1653                 } else {
1654                         netif_wake_queue(adapter->netdev);
1655                 }
1656         }
1657         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1658
1659         if (start_transmitter) {
1660                 /* space is now available, transmit overflow skb */
1661                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1662                 tx->overflow_skb = NULL;
1663                 netif_wake_queue(adapter->netdev);
1664         }
1665
1666         if (!napi_complete(napi))
1667                 goto done;
1668
1669         /* enable isr */
1670         lan743x_csr_write(adapter, INT_EN_SET,
1671                           INT_BIT_DMA_TX_(tx->channel_number));
1672         lan743x_csr_read(adapter, INT_STS);
1673
1674 done:
1675         return 0;
1676 }
1677
1678 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1679 {
1680         if (tx->head_cpu_ptr) {
1681                 pci_free_consistent(tx->adapter->pdev,
1682                                     sizeof(*tx->head_cpu_ptr),
1683                                     (void *)(tx->head_cpu_ptr),
1684                                     tx->head_dma_ptr);
1685                 tx->head_cpu_ptr = NULL;
1686                 tx->head_dma_ptr = 0;
1687         }
1688         kfree(tx->buffer_info);
1689         tx->buffer_info = NULL;
1690
1691         if (tx->ring_cpu_ptr) {
1692                 pci_free_consistent(tx->adapter->pdev,
1693                                     tx->ring_allocation_size,
1694                                     tx->ring_cpu_ptr,
1695                                     tx->ring_dma_ptr);
1696                 tx->ring_allocation_size = 0;
1697                 tx->ring_cpu_ptr = NULL;
1698                 tx->ring_dma_ptr = 0;
1699         }
1700         tx->ring_size = 0;
1701 }
1702
1703 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1704 {
1705         size_t ring_allocation_size = 0;
1706         void *cpu_ptr = NULL;
1707         dma_addr_t dma_ptr;
1708         int ret = -ENOMEM;
1709
1710         tx->ring_size = LAN743X_TX_RING_SIZE;
1711         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1712                 ret = -EINVAL;
1713                 goto cleanup;
1714         }
1715         ring_allocation_size = ALIGN(tx->ring_size *
1716                                      sizeof(struct lan743x_tx_descriptor),
1717                                      PAGE_SIZE);
1718         dma_ptr = 0;
1719         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1720                                         ring_allocation_size, &dma_ptr);
1721         if (!cpu_ptr) {
1722                 ret = -ENOMEM;
1723                 goto cleanup;
1724         }
1725
1726         tx->ring_allocation_size = ring_allocation_size;
1727         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1728         tx->ring_dma_ptr = dma_ptr;
1729
1730         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1731         if (!cpu_ptr) {
1732                 ret = -ENOMEM;
1733                 goto cleanup;
1734         }
1735         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1736         dma_ptr = 0;
1737         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1738                                         sizeof(*tx->head_cpu_ptr), &dma_ptr);
1739         if (!cpu_ptr) {
1740                 ret = -ENOMEM;
1741                 goto cleanup;
1742         }
1743
1744         tx->head_cpu_ptr = cpu_ptr;
1745         tx->head_dma_ptr = dma_ptr;
1746         if (tx->head_dma_ptr & 0x3) {
1747                 ret = -ENOMEM;
1748                 goto cleanup;
1749         }
1750
1751         return 0;
1752
1753 cleanup:
1754         lan743x_tx_ring_cleanup(tx);
1755         return ret;
1756 }
1757
1758 static void lan743x_tx_close(struct lan743x_tx *tx)
1759 {
1760         struct lan743x_adapter *adapter = tx->adapter;
1761
1762         lan743x_csr_write(adapter,
1763                           DMAC_CMD,
1764                           DMAC_CMD_STOP_T_(tx->channel_number));
1765         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1766
1767         lan743x_csr_write(adapter,
1768                           DMAC_INT_EN_CLR,
1769                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1770         lan743x_csr_write(adapter, INT_EN_CLR,
1771                           INT_BIT_DMA_TX_(tx->channel_number));
1772         napi_disable(&tx->napi);
1773         netif_napi_del(&tx->napi);
1774
1775         lan743x_csr_write(adapter, FCT_TX_CTL,
1776                           FCT_TX_CTL_DIS_(tx->channel_number));
1777         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1778                                  FCT_TX_CTL_EN_(tx->channel_number),
1779                                  0, 1000, 20000, 100);
1780
1781         lan743x_tx_release_all_descriptors(tx);
1782
1783         if (tx->overflow_skb) {
1784                 dev_kfree_skb(tx->overflow_skb);
1785                 tx->overflow_skb = NULL;
1786         }
1787
1788         lan743x_tx_ring_cleanup(tx);
1789 }
1790
1791 static int lan743x_tx_open(struct lan743x_tx *tx)
1792 {
1793         struct lan743x_adapter *adapter = NULL;
1794         u32 data = 0;
1795         int ret;
1796
1797         adapter = tx->adapter;
1798         ret = lan743x_tx_ring_init(tx);
1799         if (ret)
1800                 return ret;
1801
1802         /* initialize fifo */
1803         lan743x_csr_write(adapter, FCT_TX_CTL,
1804                           FCT_TX_CTL_RESET_(tx->channel_number));
1805         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1806                                  FCT_TX_CTL_RESET_(tx->channel_number),
1807                                  0, 1000, 20000, 100);
1808
1809         /* enable fifo */
1810         lan743x_csr_write(adapter, FCT_TX_CTL,
1811                           FCT_TX_CTL_EN_(tx->channel_number));
1812
1813         /* reset tx channel */
1814         lan743x_csr_write(adapter, DMAC_CMD,
1815                           DMAC_CMD_TX_SWR_(tx->channel_number));
1816         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1817                                  DMAC_CMD_TX_SWR_(tx->channel_number),
1818                                  0, 1000, 20000, 100);
1819
1820         /* Write TX_BASE_ADDR */
1821         lan743x_csr_write(adapter,
1822                           TX_BASE_ADDRH(tx->channel_number),
1823                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1824         lan743x_csr_write(adapter,
1825                           TX_BASE_ADDRL(tx->channel_number),
1826                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
1827
1828         /* Write TX_CFG_B */
1829         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1830         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1831         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1832         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1833                 data |= TX_CFG_B_TDMABL_512_;
1834         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1835
1836         /* Write TX_CFG_A */
1837         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1838         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1839                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1840                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1841                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1842                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1843         }
1844         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1845
1846         /* Write TX_HEAD_WRITEBACK_ADDR */
1847         lan743x_csr_write(adapter,
1848                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1849                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
1850         lan743x_csr_write(adapter,
1851                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1852                           DMA_ADDR_LOW32(tx->head_dma_ptr));
1853
1854         /* set last head */
1855         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1856
1857         /* write TX_TAIL */
1858         tx->last_tail = 0;
1859         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1860                           (u32)(tx->last_tail));
1861         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1862                                                          INT_BIT_DMA_TX_
1863                                                          (tx->channel_number));
1864         netif_tx_napi_add(adapter->netdev,
1865                           &tx->napi, lan743x_tx_napi_poll,
1866                           tx->ring_size - 1);
1867         napi_enable(&tx->napi);
1868
1869         data = 0;
1870         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1871                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1872         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1873                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1874         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1875                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1876         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1877                 data |= TX_CFG_C_TX_INT_EN_R2C_;
1878         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1879
1880         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1881                 lan743x_csr_write(adapter, INT_EN_SET,
1882                                   INT_BIT_DMA_TX_(tx->channel_number));
1883         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1884                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1885
1886         /*  start dmac channel */
1887         lan743x_csr_write(adapter, DMAC_CMD,
1888                           DMAC_CMD_START_T_(tx->channel_number));
1889         return 0;
1890 }
1891
1892 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1893 {
1894         return ((++index) % rx->ring_size);
1895 }
1896
1897 static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1898 {
1899         struct lan743x_rx_buffer_info *buffer_info;
1900         struct lan743x_rx_descriptor *descriptor;
1901         int length = 0;
1902
1903         length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1904         descriptor = &rx->ring_cpu_ptr[index];
1905         buffer_info = &rx->buffer_info[index];
1906         buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1907                                               length,
1908                                               GFP_ATOMIC | GFP_DMA);
1909         if (!(buffer_info->skb))
1910                 return -ENOMEM;
1911         buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1912                                               buffer_info->skb->data,
1913                                               length,
1914                                               DMA_FROM_DEVICE);
1915         if (dma_mapping_error(&rx->adapter->pdev->dev,
1916                               buffer_info->dma_ptr)) {
1917                 buffer_info->dma_ptr = 0;
1918                 return -ENOMEM;
1919         }
1920
1921         buffer_info->buffer_length = length;
1922         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1923         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1924         descriptor->data3 = 0;
1925         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1926                             (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1927         skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1928
1929         return 0;
1930 }
1931
1932 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1933 {
1934         struct lan743x_rx_buffer_info *buffer_info;
1935         struct lan743x_rx_descriptor *descriptor;
1936
1937         descriptor = &rx->ring_cpu_ptr[index];
1938         buffer_info = &rx->buffer_info[index];
1939
1940         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1941         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1942         descriptor->data3 = 0;
1943         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1944                             ((buffer_info->buffer_length) &
1945                             RX_DESC_DATA0_BUF_LENGTH_MASK_));
1946 }
1947
1948 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1949 {
1950         struct lan743x_rx_buffer_info *buffer_info;
1951         struct lan743x_rx_descriptor *descriptor;
1952
1953         descriptor = &rx->ring_cpu_ptr[index];
1954         buffer_info = &rx->buffer_info[index];
1955
1956         memset(descriptor, 0, sizeof(*descriptor));
1957
1958         if (buffer_info->dma_ptr) {
1959                 dma_unmap_single(&rx->adapter->pdev->dev,
1960                                  buffer_info->dma_ptr,
1961                                  buffer_info->buffer_length,
1962                                  DMA_FROM_DEVICE);
1963                 buffer_info->dma_ptr = 0;
1964         }
1965
1966         if (buffer_info->skb) {
1967                 dev_kfree_skb(buffer_info->skb);
1968                 buffer_info->skb = NULL;
1969         }
1970
1971         memset(buffer_info, 0, sizeof(*buffer_info));
1972 }
1973
1974 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1975 {
1976         struct skb_shared_hwtstamps *hwtstamps = NULL;
1977         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1978         struct lan743x_rx_buffer_info *buffer_info;
1979         struct lan743x_rx_descriptor *descriptor;
1980         int current_head_index = -1;
1981         int extension_index = -1;
1982         int first_index = -1;
1983         int last_index = -1;
1984
1985         current_head_index = *rx->head_cpu_ptr;
1986         if (current_head_index < 0 || current_head_index >= rx->ring_size)
1987                 goto done;
1988
1989         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
1990                 goto done;
1991
1992         if (rx->last_head != current_head_index) {
1993                 descriptor = &rx->ring_cpu_ptr[rx->last_head];
1994                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1995                         goto done;
1996
1997                 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
1998                         goto done;
1999
2000                 first_index = rx->last_head;
2001                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2002                         last_index = rx->last_head;
2003                 } else {
2004                         int index;
2005
2006                         index = lan743x_rx_next_index(rx, first_index);
2007                         while (index != current_head_index) {
2008                                 descriptor = &rx->ring_cpu_ptr[index];
2009                                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2010                                         goto done;
2011
2012                                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2013                                         last_index = index;
2014                                         break;
2015                                 }
2016                                 index = lan743x_rx_next_index(rx, index);
2017                         }
2018                 }
2019                 if (last_index >= 0) {
2020                         descriptor = &rx->ring_cpu_ptr[last_index];
2021                         if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2022                                 /* extension is expected to follow */
2023                                 int index = lan743x_rx_next_index(rx,
2024                                                                   last_index);
2025                                 if (index != current_head_index) {
2026                                         descriptor = &rx->ring_cpu_ptr[index];
2027                                         if (descriptor->data0 &
2028                                             RX_DESC_DATA0_OWN_) {
2029                                                 goto done;
2030                                         }
2031                                         if (descriptor->data0 &
2032                                             RX_DESC_DATA0_EXT_) {
2033                                                 extension_index = index;
2034                                         } else {
2035                                                 goto done;
2036                                         }
2037                                 } else {
2038                                         /* extension is not yet available */
2039                                         /* prevent processing of this packet */
2040                                         first_index = -1;
2041                                         last_index = -1;
2042                                 }
2043                         }
2044                 }
2045         }
2046         if (first_index >= 0 && last_index >= 0) {
2047                 int real_last_index = last_index;
2048                 struct sk_buff *skb = NULL;
2049                 u32 ts_sec = 0;
2050                 u32 ts_nsec = 0;
2051
2052                 /* packet is available */
2053                 if (first_index == last_index) {
2054                         /* single buffer packet */
2055                         int packet_length;
2056
2057                         buffer_info = &rx->buffer_info[first_index];
2058                         skb = buffer_info->skb;
2059                         descriptor = &rx->ring_cpu_ptr[first_index];
2060
2061                         /* unmap from dma */
2062                         if (buffer_info->dma_ptr) {
2063                                 dma_unmap_single(&rx->adapter->pdev->dev,
2064                                                  buffer_info->dma_ptr,
2065                                                  buffer_info->buffer_length,
2066                                                  DMA_FROM_DEVICE);
2067                                 buffer_info->dma_ptr = 0;
2068                                 buffer_info->buffer_length = 0;
2069                         }
2070                         buffer_info->skb = NULL;
2071                         packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2072                                         (descriptor->data0);
2073                         skb_put(skb, packet_length - 4);
2074                         skb->protocol = eth_type_trans(skb,
2075                                                        rx->adapter->netdev);
2076                         lan743x_rx_allocate_ring_element(rx, first_index);
2077                 } else {
2078                         int index = first_index;
2079
2080                         /* multi buffer packet not supported */
2081                         /* this should not happen since
2082                          * buffers are allocated to be at least jumbo size
2083                          */
2084
2085                         /* clean up buffers */
2086                         if (first_index <= last_index) {
2087                                 while ((index >= first_index) &&
2088                                        (index <= last_index)) {
2089                                         lan743x_rx_release_ring_element(rx,
2090                                                                         index);
2091                                         lan743x_rx_allocate_ring_element(rx,
2092                                                                          index);
2093                                         index = lan743x_rx_next_index(rx,
2094                                                                       index);
2095                                 }
2096                         } else {
2097                                 while ((index >= first_index) ||
2098                                        (index <= last_index)) {
2099                                         lan743x_rx_release_ring_element(rx,
2100                                                                         index);
2101                                         lan743x_rx_allocate_ring_element(rx,
2102                                                                          index);
2103                                         index = lan743x_rx_next_index(rx,
2104                                                                       index);
2105                                 }
2106                         }
2107                 }
2108
2109                 if (extension_index >= 0) {
2110                         descriptor = &rx->ring_cpu_ptr[extension_index];
2111                         buffer_info = &rx->buffer_info[extension_index];
2112
2113                         ts_sec = descriptor->data1;
2114                         ts_nsec = (descriptor->data2 &
2115                                   RX_DESC_DATA2_TS_NS_MASK_);
2116                         lan743x_rx_reuse_ring_element(rx, extension_index);
2117                         real_last_index = extension_index;
2118                 }
2119
2120                 if (!skb) {
2121                         result = RX_PROCESS_RESULT_PACKET_DROPPED;
2122                         goto move_forward;
2123                 }
2124
2125                 if (extension_index < 0)
2126                         goto pass_packet_to_os;
2127                 hwtstamps = skb_hwtstamps(skb);
2128                 if (hwtstamps)
2129                         hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2130
2131 pass_packet_to_os:
2132                 /* pass packet to OS */
2133                 napi_gro_receive(&rx->napi, skb);
2134                 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2135
2136 move_forward:
2137                 /* push tail and head forward */
2138                 rx->last_tail = real_last_index;
2139                 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2140         }
2141 done:
2142         return result;
2143 }
2144
2145 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2146 {
2147         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2148         struct lan743x_adapter *adapter = rx->adapter;
2149         u32 rx_tail_flags = 0;
2150         int count;
2151
2152         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2153                 /* clear int status bit before reading packet */
2154                 lan743x_csr_write(adapter, DMAC_INT_STS,
2155                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2156         }
2157         count = 0;
2158         while (count < weight) {
2159                 int rx_process_result = -1;
2160
2161                 rx_process_result = lan743x_rx_process_packet(rx);
2162                 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2163                         count++;
2164                 } else if (rx_process_result ==
2165                         RX_PROCESS_RESULT_NOTHING_TO_DO) {
2166                         break;
2167                 } else if (rx_process_result ==
2168                         RX_PROCESS_RESULT_PACKET_DROPPED) {
2169                         continue;
2170                 }
2171         }
2172         rx->frame_count += count;
2173         if (count == weight)
2174                 goto done;
2175
2176         if (!napi_complete_done(napi, count))
2177                 goto done;
2178
2179         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2180                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2181         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2182                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2183         } else {
2184                 lan743x_csr_write(adapter, INT_EN_SET,
2185                                   INT_BIT_DMA_RX_(rx->channel_number));
2186         }
2187
2188         /* update RX_TAIL */
2189         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2190                           rx_tail_flags | rx->last_tail);
2191 done:
2192         return count;
2193 }
2194
2195 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2196 {
2197         if (rx->buffer_info && rx->ring_cpu_ptr) {
2198                 int index;
2199
2200                 for (index = 0; index < rx->ring_size; index++)
2201                         lan743x_rx_release_ring_element(rx, index);
2202         }
2203
2204         if (rx->head_cpu_ptr) {
2205                 pci_free_consistent(rx->adapter->pdev,
2206                                     sizeof(*rx->head_cpu_ptr),
2207                                     rx->head_cpu_ptr,
2208                                     rx->head_dma_ptr);
2209                 rx->head_cpu_ptr = NULL;
2210                 rx->head_dma_ptr = 0;
2211         }
2212
2213         kfree(rx->buffer_info);
2214         rx->buffer_info = NULL;
2215
2216         if (rx->ring_cpu_ptr) {
2217                 pci_free_consistent(rx->adapter->pdev,
2218                                     rx->ring_allocation_size,
2219                                     rx->ring_cpu_ptr,
2220                                     rx->ring_dma_ptr);
2221                 rx->ring_allocation_size = 0;
2222                 rx->ring_cpu_ptr = NULL;
2223                 rx->ring_dma_ptr = 0;
2224         }
2225
2226         rx->ring_size = 0;
2227         rx->last_head = 0;
2228 }
2229
2230 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2231 {
2232         size_t ring_allocation_size = 0;
2233         dma_addr_t dma_ptr = 0;
2234         void *cpu_ptr = NULL;
2235         int ret = -ENOMEM;
2236         int index = 0;
2237
2238         rx->ring_size = LAN743X_RX_RING_SIZE;
2239         if (rx->ring_size <= 1) {
2240                 ret = -EINVAL;
2241                 goto cleanup;
2242         }
2243         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2244                 ret = -EINVAL;
2245                 goto cleanup;
2246         }
2247         ring_allocation_size = ALIGN(rx->ring_size *
2248                                      sizeof(struct lan743x_rx_descriptor),
2249                                      PAGE_SIZE);
2250         dma_ptr = 0;
2251         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2252                                         ring_allocation_size, &dma_ptr);
2253         if (!cpu_ptr) {
2254                 ret = -ENOMEM;
2255                 goto cleanup;
2256         }
2257         rx->ring_allocation_size = ring_allocation_size;
2258         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2259         rx->ring_dma_ptr = dma_ptr;
2260
2261         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2262                           GFP_KERNEL);
2263         if (!cpu_ptr) {
2264                 ret = -ENOMEM;
2265                 goto cleanup;
2266         }
2267         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2268         dma_ptr = 0;
2269         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2270                                         sizeof(*rx->head_cpu_ptr), &dma_ptr);
2271         if (!cpu_ptr) {
2272                 ret = -ENOMEM;
2273                 goto cleanup;
2274         }
2275
2276         rx->head_cpu_ptr = cpu_ptr;
2277         rx->head_dma_ptr = dma_ptr;
2278         if (rx->head_dma_ptr & 0x3) {
2279                 ret = -ENOMEM;
2280                 goto cleanup;
2281         }
2282
2283         rx->last_head = 0;
2284         for (index = 0; index < rx->ring_size; index++) {
2285                 ret = lan743x_rx_allocate_ring_element(rx, index);
2286                 if (ret)
2287                         goto cleanup;
2288         }
2289         return 0;
2290
2291 cleanup:
2292         lan743x_rx_ring_cleanup(rx);
2293         return ret;
2294 }
2295
2296 static void lan743x_rx_close(struct lan743x_rx *rx)
2297 {
2298         struct lan743x_adapter *adapter = rx->adapter;
2299
2300         lan743x_csr_write(adapter, FCT_RX_CTL,
2301                           FCT_RX_CTL_DIS_(rx->channel_number));
2302         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2303                                  FCT_RX_CTL_EN_(rx->channel_number),
2304                                  0, 1000, 20000, 100);
2305
2306         lan743x_csr_write(adapter, DMAC_CMD,
2307                           DMAC_CMD_STOP_R_(rx->channel_number));
2308         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2309
2310         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2311                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2312         lan743x_csr_write(adapter, INT_EN_CLR,
2313                           INT_BIT_DMA_RX_(rx->channel_number));
2314         napi_disable(&rx->napi);
2315
2316         netif_napi_del(&rx->napi);
2317
2318         lan743x_rx_ring_cleanup(rx);
2319 }
2320
2321 static int lan743x_rx_open(struct lan743x_rx *rx)
2322 {
2323         struct lan743x_adapter *adapter = rx->adapter;
2324         u32 data = 0;
2325         int ret;
2326
2327         rx->frame_count = 0;
2328         ret = lan743x_rx_ring_init(rx);
2329         if (ret)
2330                 goto return_error;
2331
2332         netif_napi_add(adapter->netdev,
2333                        &rx->napi, lan743x_rx_napi_poll,
2334                        rx->ring_size - 1);
2335
2336         lan743x_csr_write(adapter, DMAC_CMD,
2337                           DMAC_CMD_RX_SWR_(rx->channel_number));
2338         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2339                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2340                                  0, 1000, 20000, 100);
2341
2342         /* set ring base address */
2343         lan743x_csr_write(adapter,
2344                           RX_BASE_ADDRH(rx->channel_number),
2345                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2346         lan743x_csr_write(adapter,
2347                           RX_BASE_ADDRL(rx->channel_number),
2348                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2349
2350         /* set rx write back address */
2351         lan743x_csr_write(adapter,
2352                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2353                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2354         lan743x_csr_write(adapter,
2355                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2356                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2357         data = RX_CFG_A_RX_HP_WB_EN_;
2358         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2359                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2360                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2361                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2362                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2363         }
2364
2365         /* set RX_CFG_A */
2366         lan743x_csr_write(adapter,
2367                           RX_CFG_A(rx->channel_number), data);
2368
2369         /* set RX_CFG_B */
2370         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2371         data &= ~RX_CFG_B_RX_PAD_MASK_;
2372         if (!RX_HEAD_PADDING)
2373                 data |= RX_CFG_B_RX_PAD_0_;
2374         else
2375                 data |= RX_CFG_B_RX_PAD_2_;
2376         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2377         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2378         data |= RX_CFG_B_TS_ALL_RX_;
2379         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2380                 data |= RX_CFG_B_RDMABL_512_;
2381
2382         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2383         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2384                                                          INT_BIT_DMA_RX_
2385                                                          (rx->channel_number));
2386
2387         /* set RX_CFG_C */
2388         data = 0;
2389         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2390                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2391         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2392                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2393         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2394                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2395         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2396                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2397         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2398
2399         rx->last_tail = ((u32)(rx->ring_size - 1));
2400         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2401                           rx->last_tail);
2402         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2403         if (rx->last_head) {
2404                 ret = -EIO;
2405                 goto napi_delete;
2406         }
2407
2408         napi_enable(&rx->napi);
2409
2410         lan743x_csr_write(adapter, INT_EN_SET,
2411                           INT_BIT_DMA_RX_(rx->channel_number));
2412         lan743x_csr_write(adapter, DMAC_INT_STS,
2413                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2414         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2415                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2416         lan743x_csr_write(adapter, DMAC_CMD,
2417                           DMAC_CMD_START_R_(rx->channel_number));
2418
2419         /* initialize fifo */
2420         lan743x_csr_write(adapter, FCT_RX_CTL,
2421                           FCT_RX_CTL_RESET_(rx->channel_number));
2422         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2423                                  FCT_RX_CTL_RESET_(rx->channel_number),
2424                                  0, 1000, 20000, 100);
2425         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2426                           FCT_FLOW_CTL_REQ_EN_ |
2427                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2428                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2429
2430         /* enable fifo */
2431         lan743x_csr_write(adapter, FCT_RX_CTL,
2432                           FCT_RX_CTL_EN_(rx->channel_number));
2433         return 0;
2434
2435 napi_delete:
2436         netif_napi_del(&rx->napi);
2437         lan743x_rx_ring_cleanup(rx);
2438
2439 return_error:
2440         return ret;
2441 }
2442
2443 static int lan743x_netdev_close(struct net_device *netdev)
2444 {
2445         struct lan743x_adapter *adapter = netdev_priv(netdev);
2446         int index;
2447
2448         lan743x_tx_close(&adapter->tx[0]);
2449
2450         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2451                 lan743x_rx_close(&adapter->rx[index]);
2452
2453         lan743x_ptp_close(adapter);
2454
2455         lan743x_phy_close(adapter);
2456
2457         lan743x_mac_close(adapter);
2458
2459         lan743x_intr_close(adapter);
2460
2461         return 0;
2462 }
2463
2464 static int lan743x_netdev_open(struct net_device *netdev)
2465 {
2466         struct lan743x_adapter *adapter = netdev_priv(netdev);
2467         int index;
2468         int ret;
2469
2470         ret = lan743x_intr_open(adapter);
2471         if (ret)
2472                 goto return_error;
2473
2474         ret = lan743x_mac_open(adapter);
2475         if (ret)
2476                 goto close_intr;
2477
2478         ret = lan743x_phy_open(adapter);
2479         if (ret)
2480                 goto close_mac;
2481
2482         ret = lan743x_ptp_open(adapter);
2483         if (ret)
2484                 goto close_phy;
2485
2486         lan743x_rfe_open(adapter);
2487
2488         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2489                 ret = lan743x_rx_open(&adapter->rx[index]);
2490                 if (ret)
2491                         goto close_rx;
2492         }
2493
2494         ret = lan743x_tx_open(&adapter->tx[0]);
2495         if (ret)
2496                 goto close_rx;
2497
2498         return 0;
2499
2500 close_rx:
2501         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2502                 if (adapter->rx[index].ring_cpu_ptr)
2503                         lan743x_rx_close(&adapter->rx[index]);
2504         }
2505         lan743x_ptp_close(adapter);
2506
2507 close_phy:
2508         lan743x_phy_close(adapter);
2509
2510 close_mac:
2511         lan743x_mac_close(adapter);
2512
2513 close_intr:
2514         lan743x_intr_close(adapter);
2515
2516 return_error:
2517         netif_warn(adapter, ifup, adapter->netdev,
2518                    "Error opening LAN743x\n");
2519         return ret;
2520 }
2521
2522 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2523                                              struct net_device *netdev)
2524 {
2525         struct lan743x_adapter *adapter = netdev_priv(netdev);
2526
2527         return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2528 }
2529
2530 static int lan743x_netdev_ioctl(struct net_device *netdev,
2531                                 struct ifreq *ifr, int cmd)
2532 {
2533         if (!netif_running(netdev))
2534                 return -EINVAL;
2535         if (cmd == SIOCSHWTSTAMP)
2536                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2537         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2538 }
2539
2540 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2541 {
2542         struct lan743x_adapter *adapter = netdev_priv(netdev);
2543
2544         lan743x_rfe_set_multicast(adapter);
2545 }
2546
2547 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2548 {
2549         struct lan743x_adapter *adapter = netdev_priv(netdev);
2550         int ret = 0;
2551
2552         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2553         if (!ret)
2554                 netdev->mtu = new_mtu;
2555         return ret;
2556 }
2557
2558 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2559                                        struct rtnl_link_stats64 *stats)
2560 {
2561         struct lan743x_adapter *adapter = netdev_priv(netdev);
2562
2563         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2564         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2565         stats->rx_bytes = lan743x_csr_read(adapter,
2566                                            STAT_RX_UNICAST_BYTE_COUNT) +
2567                           lan743x_csr_read(adapter,
2568                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2569                           lan743x_csr_read(adapter,
2570                                            STAT_RX_MULTICAST_BYTE_COUNT);
2571         stats->tx_bytes = lan743x_csr_read(adapter,
2572                                            STAT_TX_UNICAST_BYTE_COUNT) +
2573                           lan743x_csr_read(adapter,
2574                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2575                           lan743x_csr_read(adapter,
2576                                            STAT_TX_MULTICAST_BYTE_COUNT);
2577         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2578                            lan743x_csr_read(adapter,
2579                                             STAT_RX_ALIGNMENT_ERRORS) +
2580                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2581                            lan743x_csr_read(adapter,
2582                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2583                            lan743x_csr_read(adapter,
2584                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2585         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2586                            lan743x_csr_read(adapter,
2587                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2588                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2589         stats->rx_dropped = lan743x_csr_read(adapter,
2590                                              STAT_RX_DROPPED_FRAMES);
2591         stats->tx_dropped = lan743x_csr_read(adapter,
2592                                              STAT_TX_EXCESSIVE_COLLISION);
2593         stats->multicast = lan743x_csr_read(adapter,
2594                                             STAT_RX_MULTICAST_FRAMES) +
2595                            lan743x_csr_read(adapter,
2596                                             STAT_TX_MULTICAST_FRAMES);
2597         stats->collisions = lan743x_csr_read(adapter,
2598                                              STAT_TX_SINGLE_COLLISIONS) +
2599                             lan743x_csr_read(adapter,
2600                                              STAT_TX_MULTIPLE_COLLISIONS) +
2601                             lan743x_csr_read(adapter,
2602                                              STAT_TX_LATE_COLLISIONS);
2603 }
2604
2605 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2606                                           void *addr)
2607 {
2608         struct lan743x_adapter *adapter = netdev_priv(netdev);
2609         struct sockaddr *sock_addr = addr;
2610         int ret;
2611
2612         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2613         if (ret)
2614                 return ret;
2615         ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2616         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2617         lan743x_rfe_update_mac_address(adapter);
2618         return 0;
2619 }
2620
2621 static const struct net_device_ops lan743x_netdev_ops = {
2622         .ndo_open               = lan743x_netdev_open,
2623         .ndo_stop               = lan743x_netdev_close,
2624         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2625         .ndo_do_ioctl           = lan743x_netdev_ioctl,
2626         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2627         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2628         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2629         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2630 };
2631
2632 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2633 {
2634         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2635 }
2636
2637 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2638 {
2639         mdiobus_unregister(adapter->mdiobus);
2640 }
2641
2642 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2643 {
2644         unregister_netdev(adapter->netdev);
2645
2646         lan743x_mdiobus_cleanup(adapter);
2647         lan743x_hardware_cleanup(adapter);
2648         lan743x_pci_cleanup(adapter);
2649 }
2650
2651 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2652                                  struct pci_dev *pdev)
2653 {
2654         struct lan743x_tx *tx;
2655         int index;
2656         int ret;
2657
2658         adapter->intr.irq = adapter->pdev->irq;
2659         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2660         mutex_init(&adapter->dp_lock);
2661
2662         ret = lan743x_gpio_init(adapter);
2663         if (ret)
2664                 return ret;
2665
2666         ret = lan743x_mac_init(adapter);
2667         if (ret)
2668                 return ret;
2669
2670         ret = lan743x_phy_init(adapter);
2671         if (ret)
2672                 return ret;
2673
2674         ret = lan743x_ptp_init(adapter);
2675         if (ret)
2676                 return ret;
2677
2678         lan743x_rfe_update_mac_address(adapter);
2679
2680         ret = lan743x_dmac_init(adapter);
2681         if (ret)
2682                 return ret;
2683
2684         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2685                 adapter->rx[index].adapter = adapter;
2686                 adapter->rx[index].channel_number = index;
2687         }
2688
2689         tx = &adapter->tx[0];
2690         tx->adapter = adapter;
2691         tx->channel_number = 0;
2692         spin_lock_init(&tx->ring_lock);
2693         return 0;
2694 }
2695
2696 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2697 {
2698         int ret;
2699
2700         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2701         if (!(adapter->mdiobus)) {
2702                 ret = -ENOMEM;
2703                 goto return_error;
2704         }
2705
2706         adapter->mdiobus->priv = (void *)adapter;
2707         adapter->mdiobus->read = lan743x_mdiobus_read;
2708         adapter->mdiobus->write = lan743x_mdiobus_write;
2709         adapter->mdiobus->name = "lan743x-mdiobus";
2710         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2711                  "pci-%s", pci_name(adapter->pdev));
2712
2713         if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2714                 /* LAN7430 uses internal phy at address 1 */
2715                 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2716
2717         /* register mdiobus */
2718         ret = mdiobus_register(adapter->mdiobus);
2719         if (ret < 0)
2720                 goto return_error;
2721         return 0;
2722
2723 return_error:
2724         return ret;
2725 }
2726
2727 /* lan743x_pcidev_probe - Device Initialization Routine
2728  * @pdev: PCI device information struct
2729  * @id: entry in lan743x_pci_tbl
2730  *
2731  * Returns 0 on success, negative on failure
2732  *
2733  * initializes an adapter identified by a pci_dev structure.
2734  * The OS initialization, configuring of the adapter private structure,
2735  * and a hardware reset occur.
2736  **/
2737 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2738                                 const struct pci_device_id *id)
2739 {
2740         struct lan743x_adapter *adapter = NULL;
2741         struct net_device *netdev = NULL;
2742         int ret = -ENODEV;
2743
2744         netdev = devm_alloc_etherdev(&pdev->dev,
2745                                      sizeof(struct lan743x_adapter));
2746         if (!netdev)
2747                 goto return_error;
2748
2749         SET_NETDEV_DEV(netdev, &pdev->dev);
2750         pci_set_drvdata(pdev, netdev);
2751         adapter = netdev_priv(netdev);
2752         adapter->netdev = netdev;
2753         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2754                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
2755                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2756         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2757
2758         ret = lan743x_pci_init(adapter, pdev);
2759         if (ret)
2760                 goto return_error;
2761
2762         ret = lan743x_csr_init(adapter);
2763         if (ret)
2764                 goto cleanup_pci;
2765
2766         ret = lan743x_hardware_init(adapter, pdev);
2767         if (ret)
2768                 goto cleanup_pci;
2769
2770         ret = lan743x_mdiobus_init(adapter);
2771         if (ret)
2772                 goto cleanup_hardware;
2773
2774         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2775         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2776         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2777         adapter->netdev->hw_features = adapter->netdev->features;
2778
2779         /* carrier off reporting is important to ethtool even BEFORE open */
2780         netif_carrier_off(netdev);
2781
2782         ret = register_netdev(adapter->netdev);
2783         if (ret < 0)
2784                 goto cleanup_mdiobus;
2785         return 0;
2786
2787 cleanup_mdiobus:
2788         lan743x_mdiobus_cleanup(adapter);
2789
2790 cleanup_hardware:
2791         lan743x_hardware_cleanup(adapter);
2792
2793 cleanup_pci:
2794         lan743x_pci_cleanup(adapter);
2795
2796 return_error:
2797         pr_warn("Initialization failed\n");
2798         return ret;
2799 }
2800
2801 /**
2802  * lan743x_pcidev_remove - Device Removal Routine
2803  * @pdev: PCI device information struct
2804  *
2805  * this is called by the PCI subsystem to alert the driver
2806  * that it should release a PCI device.  This could be caused by a
2807  * Hot-Plug event, or because the driver is going to be removed from
2808  * memory.
2809  **/
2810 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2811 {
2812         struct net_device *netdev = pci_get_drvdata(pdev);
2813         struct lan743x_adapter *adapter = netdev_priv(netdev);
2814
2815         lan743x_full_cleanup(adapter);
2816 }
2817
2818 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2819 {
2820         struct net_device *netdev = pci_get_drvdata(pdev);
2821         struct lan743x_adapter *adapter = netdev_priv(netdev);
2822
2823         rtnl_lock();
2824         netif_device_detach(netdev);
2825
2826         /* close netdev when netdev is at running state.
2827          * For instance, it is true when system goes to sleep by pm-suspend
2828          * However, it is false when system goes to sleep by suspend GUI menu
2829          */
2830         if (netif_running(netdev))
2831                 lan743x_netdev_close(netdev);
2832         rtnl_unlock();
2833
2834 #ifdef CONFIG_PM
2835         pci_save_state(pdev);
2836 #endif
2837
2838         /* clean up lan743x portion */
2839         lan743x_hardware_cleanup(adapter);
2840 }
2841
2842 #ifdef CONFIG_PM_SLEEP
2843 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2844 {
2845         return bitrev16(crc16(0xFFFF, buf, len));
2846 }
2847
2848 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2849 {
2850         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2851         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2852         const u8 arp_type[2] = { 0x08, 0x06 };
2853         int mask_index;
2854         u32 pmtctl;
2855         u32 wucsr;
2856         u32 macrx;
2857         u16 crc;
2858
2859         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2860                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2861
2862         /* clear wake settings */
2863         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2864         pmtctl |= PMT_CTL_WUPS_MASK_;
2865         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2866                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2867                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2868
2869         macrx = lan743x_csr_read(adapter, MAC_RX);
2870
2871         wucsr = 0;
2872         mask_index = 0;
2873
2874         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2875
2876         if (adapter->wolopts & WAKE_PHY) {
2877                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2878                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2879         }
2880         if (adapter->wolopts & WAKE_MAGIC) {
2881                 wucsr |= MAC_WUCSR_MPEN_;
2882                 macrx |= MAC_RX_RXEN_;
2883                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2884         }
2885         if (adapter->wolopts & WAKE_UCAST) {
2886                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2887                 macrx |= MAC_RX_RXEN_;
2888                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2889                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2890         }
2891         if (adapter->wolopts & WAKE_BCAST) {
2892                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2893                 macrx |= MAC_RX_RXEN_;
2894                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2895                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2896         }
2897         if (adapter->wolopts & WAKE_MCAST) {
2898                 /* IPv4 multicast */
2899                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2900                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2901                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2902                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2903                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2904                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2905                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2906                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2907                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2908                 mask_index++;
2909
2910                 /* IPv6 multicast */
2911                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2912                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2913                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2914                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2915                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2916                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2917                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2918                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2919                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2920                 mask_index++;
2921
2922                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2923                 macrx |= MAC_RX_RXEN_;
2924                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2925                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2926         }
2927         if (adapter->wolopts & WAKE_ARP) {
2928                 /* set MAC_WUF_CFG & WUF_MASK
2929                  * for packettype (offset 12,13) = ARP (0x0806)
2930                  */
2931                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2932                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2933                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2934                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2935                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2936                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2937                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2938                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2939                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2940                 mask_index++;
2941
2942                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2943                 macrx |= MAC_RX_RXEN_;
2944                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2945                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2946         }
2947
2948         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2949         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2950         lan743x_csr_write(adapter, MAC_RX, macrx);
2951 }
2952
2953 static int lan743x_pm_suspend(struct device *dev)
2954 {
2955         struct pci_dev *pdev = to_pci_dev(dev);
2956         struct net_device *netdev = pci_get_drvdata(pdev);
2957         struct lan743x_adapter *adapter = netdev_priv(netdev);
2958         int ret;
2959
2960         lan743x_pcidev_shutdown(pdev);
2961
2962         /* clear all wakes */
2963         lan743x_csr_write(adapter, MAC_WUCSR, 0);
2964         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2965         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
2966
2967         if (adapter->wolopts)
2968                 lan743x_pm_set_wol(adapter);
2969
2970         /* Host sets PME_En, put D3hot */
2971         ret = pci_prepare_to_sleep(pdev);
2972
2973         return 0;
2974 }
2975
2976 static int lan743x_pm_resume(struct device *dev)
2977 {
2978         struct pci_dev *pdev = to_pci_dev(dev);
2979         struct net_device *netdev = pci_get_drvdata(pdev);
2980         struct lan743x_adapter *adapter = netdev_priv(netdev);
2981         int ret;
2982
2983         pci_set_power_state(pdev, PCI_D0);
2984         pci_restore_state(pdev);
2985         pci_save_state(pdev);
2986
2987         ret = lan743x_hardware_init(adapter, pdev);
2988         if (ret) {
2989                 netif_err(adapter, probe, adapter->netdev,
2990                           "lan743x_hardware_init returned %d\n", ret);
2991         }
2992
2993         /* open netdev when netdev is at running state while resume.
2994          * For instance, it is true when system wakesup after pm-suspend
2995          * However, it is false when system wakes up after suspend GUI menu
2996          */
2997         if (netif_running(netdev))
2998                 lan743x_netdev_open(netdev);
2999
3000         netif_device_attach(netdev);
3001
3002         return 0;
3003 }
3004
3005 static const struct dev_pm_ops lan743x_pm_ops = {
3006         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3007 };
3008 #endif /* CONFIG_PM_SLEEP */
3009
3010 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3011         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3012         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3013         { 0, }
3014 };
3015
3016 static struct pci_driver lan743x_pcidev_driver = {
3017         .name     = DRIVER_NAME,
3018         .id_table = lan743x_pcidev_tbl,
3019         .probe    = lan743x_pcidev_probe,
3020         .remove   = lan743x_pcidev_remove,
3021 #ifdef CONFIG_PM_SLEEP
3022         .driver.pm = &lan743x_pm_ops,
3023 #endif
3024         .shutdown = lan743x_pcidev_shutdown,
3025 };
3026
3027 module_pci_driver(lan743x_pcidev_driver);
3028
3029 MODULE_AUTHOR(DRIVER_AUTHOR);
3030 MODULE_DESCRIPTION(DRIVER_DESC);
3031 MODULE_LICENSE("GPL");