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         int ret;
 806
 807         netdev = adapter->netdev;
 808         lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
 809         ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
 810                                        0, 1000, 20000, 100);
 811         if (ret)
 812                 return ret;
 813
 814         /* setup auto duplex, and speed detection */
 815         data = lan743x_csr_read(adapter, MAC_CR);
 816         data |= MAC_CR_ADD_ | MAC_CR_ASD_;
 817         data |= MAC_CR_CNTR_RST_;
 818         lan743x_csr_write(adapter, MAC_CR, data);
 819
 820         mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 821         mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 822         adapter->mac_address[0] = mac_addr_lo & 0xFF;
 823         adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 824         adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 825         adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 826         adapter->mac_address[4] = mac_addr_hi & 0xFF;
 827         adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 828
 829         if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 830             mac_addr_lo == 0xFFFFFFFF) {
 831                 mac_address_valid = false;
 832         } else if (!is_valid_ether_addr(adapter->mac_address)) {
 833                 mac_address_valid = false;
 834         }
 835
 836         if (!mac_address_valid)
 837                 eth_random_addr(adapter->mac_address);
 838         lan743x_mac_set_address(adapter, adapter->mac_address);
 839         ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 840         return 0;
 841 }
 842
 843 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 844 {
 845         int ret = 0;
 846         u32 temp;
 847
 848         temp = lan743x_csr_read(adapter, MAC_RX);
 849         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 850         temp = lan743x_csr_read(adapter, MAC_TX);
 851         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 852         return ret;
 853 }
 854
 855 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 856 {
 857         u32 temp;
 858
 859         temp = lan743x_csr_read(adapter, MAC_TX);
 860         temp &= ~MAC_TX_TXEN_;
 861         lan743x_csr_write(adapter, MAC_TX, temp);
 862         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 863                                  1, 1000, 20000, 100);
 864
 865         temp = lan743x_csr_read(adapter, MAC_RX);
 866         temp &= ~MAC_RX_RXEN_;
 867         lan743x_csr_write(adapter, MAC_RX, temp);
 868         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 869                                  1, 1000, 20000, 100);
 870 }
 871
 872 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 873                                               bool tx_enable, bool rx_enable)
 874 {
 875         u32 flow_setting = 0;
 876
 877         /* set maximum pause time because when fifo space frees
 878          * up a zero value pause frame will be sent to release the pause
 879          */
 880         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 881         if (tx_enable)
 882                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 883         if (rx_enable)
 884                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 885         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 886 }
 887
 888 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 889 {
 890         int enabled = 0;
 891         u32 mac_rx = 0;
 892
 893         mac_rx = lan743x_csr_read(adapter, MAC_RX);
 894         if (mac_rx & MAC_RX_RXEN_) {
 895                 enabled = 1;
 896                 if (mac_rx & MAC_RX_RXD_) {
 897                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 898                         mac_rx &= ~MAC_RX_RXD_;
 899                 }
 900                 mac_rx &= ~MAC_RX_RXEN_;
 901                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 902                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 903                                          1, 1000, 20000, 100);
 904                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 905         }
 906
 907         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 908         mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
 909                   MAC_RX_MAX_SIZE_MASK_);
 910         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 911
 912         if (enabled) {
 913                 mac_rx |= MAC_RX_RXEN_;
 914                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 915         }
 916         return 0;
 917 }
 918
 919 /* PHY */
 920 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 921 {
 922         u32 data;
 923
 924         /* Only called with in probe, and before mdiobus_register */
 925
 926         data = lan743x_csr_read(adapter, PMT_CTL);
 927         data |= PMT_CTL_ETH_PHY_RST_;
 928         lan743x_csr_write(adapter, PMT_CTL, data);
 929
 930         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 931                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
 932                                   (data & PMT_CTL_READY_)),
 933                                   50000, 1000000);
 934 }
 935
 936 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 937                                            u8 duplex, u16 local_adv,
 938                                            u16 remote_adv)
 939 {
 940         struct lan743x_phy *phy = &adapter->phy;
 941         u8 cap;
 942
 943         if (phy->fc_autoneg)
 944                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 945         else
 946                 cap = phy->fc_request_control;
 947
 948         lan743x_mac_flow_ctrl_set_enables(adapter,
 949                                           cap & FLOW_CTRL_TX,
 950                                           cap & FLOW_CTRL_RX);
 951 }
 952
 953 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 954 {
 955         return lan743x_phy_reset(adapter);
 956 }
 957
 958 static void lan743x_phy_link_status_change(struct net_device *netdev)
 959 {
 960         struct lan743x_adapter *adapter = netdev_priv(netdev);
 961         struct phy_device *phydev = netdev->phydev;
 962
 963         phy_print_status(phydev);
 964         if (phydev->state == PHY_RUNNING) {
 965                 struct ethtool_link_ksettings ksettings;
 966                 int remote_advertisement = 0;
 967                 int local_advertisement = 0;
 968
 969                 memset(&ksettings, 0, sizeof(ksettings));
 970                 phy_ethtool_get_link_ksettings(netdev, &ksettings);
 971                 local_advertisement = phy_read(phydev, MII_ADVERTISE);
 972                 if (local_advertisement < 0)
 973                         return;
 974
 975                 remote_advertisement = phy_read(phydev, MII_LPA);
 976                 if (remote_advertisement < 0)
 977                         return;
 978
 979                 lan743x_phy_update_flowcontrol(adapter,
 980                                                ksettings.base.duplex,
 981                                                local_advertisement,
 982                                                remote_advertisement);
 983                 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
 984         }
 985 }
 986
 987 static void lan743x_phy_close(struct lan743x_adapter *adapter)
 988 {
 989         struct net_device *netdev = adapter->netdev;
 990
 991         phy_stop(netdev->phydev);
 992         phy_disconnect(netdev->phydev);
 993         netdev->phydev = NULL;
 994 }
 995
 996 static int lan743x_phy_open(struct lan743x_adapter *adapter)
 997 {
 998         struct lan743x_phy *phy = &adapter->phy;
 999         struct phy_device *phydev;
1000         struct net_device *netdev;
1001         int ret = -EIO;
1002
1003         netdev = adapter->netdev;
1004         phydev = phy_find_first(adapter->mdiobus);
1005         if (!phydev)
1006                 goto return_error;
1007
1008         ret = phy_connect_direct(netdev, phydev,
1009                                  lan743x_phy_link_status_change,
1010                                  PHY_INTERFACE_MODE_GMII);
1011         if (ret)
1012                 goto return_error;
1013
1014         /* MAC doesn't support 1000T Half */
1015         phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1016
1017         /* support both flow controls */
1018         phy_support_asym_pause(phydev);
1019         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1020         phy->fc_autoneg = phydev->autoneg;
1021
1022         phy_start(phydev);
1023         phy_start_aneg(phydev);
1024         return 0;
1025
1026 return_error:
1027         return ret;
1028 }
1029
1030 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1031 {
1032         lan743x_csr_write(adapter, RFE_RSS_CFG,
1033                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1034                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1035                 RFE_RSS_CFG_IPV6_EX_ |
1036                 RFE_RSS_CFG_UDP_IPV6_ |
1037                 RFE_RSS_CFG_TCP_IPV6_ |
1038                 RFE_RSS_CFG_IPV6_ |
1039                 RFE_RSS_CFG_UDP_IPV4_ |
1040                 RFE_RSS_CFG_TCP_IPV4_ |
1041                 RFE_RSS_CFG_IPV4_ |
1042                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1043                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1044                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1045                 RFE_RSS_CFG_RSS_ENABLE_);
1046 }
1047
1048 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1049 {
1050         u8 *mac_addr;
1051         u32 mac_addr_hi = 0;
1052         u32 mac_addr_lo = 0;
1053
1054         /* Add mac address to perfect Filter */
1055         mac_addr = adapter->mac_address;
1056         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1057                       (((u32)(mac_addr[1])) << 8) |
1058                       (((u32)(mac_addr[2])) << 16) |
1059                       (((u32)(mac_addr[3])) << 24));
1060         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1061                       (((u32)(mac_addr[5])) << 8));
1062
1063         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1064         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1065                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1066 }
1067
1068 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1069 {
1070         struct net_device *netdev = adapter->netdev;
1071         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1072         u32 rfctl;
1073         u32 data;
1074
1075         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1076         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1077                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1078         rfctl |= RFE_CTL_AB_;
1079         if (netdev->flags & IFF_PROMISC) {
1080                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1081         } else {
1082                 if (netdev->flags & IFF_ALLMULTI)
1083                         rfctl |= RFE_CTL_AM_;
1084         }
1085
1086         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1087         if (netdev_mc_count(netdev)) {
1088                 struct netdev_hw_addr *ha;
1089                 int i;
1090
1091                 rfctl |= RFE_CTL_DA_PERFECT_;
1092                 i = 1;
1093                 netdev_for_each_mc_addr(ha, netdev) {
1094                         /* set first 32 into Perfect Filter */
1095                         if (i < 33) {
1096                                 lan743x_csr_write(adapter,
1097                                                   RFE_ADDR_FILT_HI(i), 0);
1098                                 data = ha->addr[3];
1099                                 data = ha->addr[2] | (data << 8);
1100                                 data = ha->addr[1] | (data << 8);
1101                                 data = ha->addr[0] | (data << 8);
1102                                 lan743x_csr_write(adapter,
1103                                                   RFE_ADDR_FILT_LO(i), data);
1104                                 data = ha->addr[5];
1105                                 data = ha->addr[4] | (data << 8);
1106                                 data |= RFE_ADDR_FILT_HI_VALID_;
1107                                 lan743x_csr_write(adapter,
1108                                                   RFE_ADDR_FILT_HI(i), data);
1109                         } else {
1110                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1111                                              23) & 0x1FF;
1112                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1113                                 rfctl |= RFE_CTL_MCAST_HASH_;
1114                         }
1115                         i++;
1116                 }
1117         }
1118
1119         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1120                          DP_SEL_VHF_VLAN_LEN,
1121                          DP_SEL_VHF_HASH_LEN, hash_table);
1122         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1123 }
1124
1125 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1126 {
1127         u32 data = 0;
1128
1129         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1130         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1131                                  0, 1000, 20000, 100);
1132         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1133         case DMA_DESCRIPTOR_SPACING_16:
1134                 data = DMAC_CFG_MAX_DSPACE_16_;
1135                 break;
1136         case DMA_DESCRIPTOR_SPACING_32:
1137                 data = DMAC_CFG_MAX_DSPACE_32_;
1138                 break;
1139         case DMA_DESCRIPTOR_SPACING_64:
1140                 data = DMAC_CFG_MAX_DSPACE_64_;
1141                 break;
1142         case DMA_DESCRIPTOR_SPACING_128:
1143                 data = DMAC_CFG_MAX_DSPACE_128_;
1144                 break;
1145         default:
1146                 return -EPERM;
1147         }
1148         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1149                 data |= DMAC_CFG_COAL_EN_;
1150         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1151         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1152         lan743x_csr_write(adapter, DMAC_CFG, data);
1153         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1154         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1155         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1156         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1157         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1158         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1159         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1160         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1161         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1162         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1163         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1164         return 0;
1165 }
1166
1167 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1168                                      int tx_channel)
1169 {
1170         u32 dmac_cmd = 0;
1171
1172         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1173         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1174                                       DMAC_CMD_START_T_(tx_channel)),
1175                                       (dmac_cmd &
1176                                       DMAC_CMD_STOP_T_(tx_channel)));
1177 }
1178
1179 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1180                                              int tx_channel)
1181 {
1182         int timeout = 100;
1183         int result = 0;
1184
1185         while (timeout &&
1186                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1187                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1188                 usleep_range(1000, 20000);
1189                 timeout--;
1190         }
1191         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1192                 result = -ENODEV;
1193         return result;
1194 }
1195
1196 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1197                                      int rx_channel)
1198 {
1199         u32 dmac_cmd = 0;
1200
1201         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1202         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1203                                       DMAC_CMD_START_R_(rx_channel)),
1204                                       (dmac_cmd &
1205                                       DMAC_CMD_STOP_R_(rx_channel)));
1206 }
1207
1208 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1209                                              int rx_channel)
1210 {
1211         int timeout = 100;
1212         int result = 0;
1213
1214         while (timeout &&
1215                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1216                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1217                 usleep_range(1000, 20000);
1218                 timeout--;
1219         }
1220         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1221                 result = -ENODEV;
1222         return result;
1223 }
1224
1225 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1226                                     int descriptor_index, bool cleanup)
1227 {
1228         struct lan743x_tx_buffer_info *buffer_info = NULL;
1229         struct lan743x_tx_descriptor *descriptor = NULL;
1230         u32 descriptor_type = 0;
1231         bool ignore_sync;
1232
1233         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1234         buffer_info = &tx->buffer_info[descriptor_index];
1235         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1236                 goto done;
1237
1238         descriptor_type = (descriptor->data0) &
1239                           TX_DESC_DATA0_DTYPE_MASK_;
1240         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1241                 goto clean_up_data_descriptor;
1242         else
1243                 goto clear_active;
1244
1245 clean_up_data_descriptor:
1246         if (buffer_info->dma_ptr) {
1247                 if (buffer_info->flags &
1248                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1249                         dma_unmap_page(&tx->adapter->pdev->dev,
1250                                        buffer_info->dma_ptr,
1251                                        buffer_info->buffer_length,
1252                                        DMA_TO_DEVICE);
1253                 } else {
1254                         dma_unmap_single(&tx->adapter->pdev->dev,
1255                                          buffer_info->dma_ptr,
1256                                          buffer_info->buffer_length,
1257                                          DMA_TO_DEVICE);
1258                 }
1259                 buffer_info->dma_ptr = 0;
1260                 buffer_info->buffer_length = 0;
1261         }
1262         if (!buffer_info->skb)
1263                 goto clear_active;
1264
1265         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1266                 dev_kfree_skb(buffer_info->skb);
1267                 goto clear_skb;
1268         }
1269
1270         if (cleanup) {
1271                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1272                 dev_kfree_skb(buffer_info->skb);
1273         } else {
1274                 ignore_sync = (buffer_info->flags &
1275                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1276                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1277                                              buffer_info->skb, ignore_sync);
1278         }
1279
1280 clear_skb:
1281         buffer_info->skb = NULL;
1282
1283 clear_active:
1284         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1285
1286 done:
1287         memset(buffer_info, 0, sizeof(*buffer_info));
1288         memset(descriptor, 0, sizeof(*descriptor));
1289 }
1290
1291 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1292 {
1293         return ((++index) % tx->ring_size);
1294 }
1295
1296 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1297 {
1298         while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1299                 lan743x_tx_release_desc(tx, tx->last_head, false);
1300                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1301         }
1302 }
1303
1304 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1305 {
1306         u32 original_head = 0;
1307
1308         original_head = tx->last_head;
1309         do {
1310                 lan743x_tx_release_desc(tx, tx->last_head, true);
1311                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1312         } while (tx->last_head != original_head);
1313         memset(tx->ring_cpu_ptr, 0,
1314                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1315         memset(tx->buffer_info, 0,
1316                sizeof(*tx->buffer_info) * (tx->ring_size));
1317 }
1318
1319 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1320                                    struct sk_buff *skb)
1321 {
1322         int result = 1; /* 1 for the main skb buffer */
1323         int nr_frags = 0;
1324
1325         if (skb_is_gso(skb))
1326                 result++; /* requires an extension descriptor */
1327         nr_frags = skb_shinfo(skb)->nr_frags;
1328         result += nr_frags; /* 1 for each fragment buffer */
1329         return result;
1330 }
1331
1332 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1333 {
1334         int last_head = tx->last_head;
1335         int last_tail = tx->last_tail;
1336
1337         if (last_tail >= last_head)
1338                 return tx->ring_size - last_tail + last_head - 1;
1339         else
1340                 return last_head - last_tail - 1;
1341 }
1342
1343 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1344                                       bool enable_timestamping,
1345                                       bool enable_onestep_sync)
1346 {
1347         if (enable_timestamping)
1348                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1349         else
1350                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1351         if (enable_onestep_sync)
1352                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1353         else
1354                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1355 }
1356
1357 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1358                                   unsigned char *first_buffer,
1359                                   unsigned int first_buffer_length,
1360                                   unsigned int frame_length,
1361                                   bool time_stamp,
1362                                   bool check_sum)
1363 {
1364         /* called only from within lan743x_tx_xmit_frame.
1365          * assuming tx->ring_lock has already been acquired.
1366          */
1367         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1368         struct lan743x_tx_buffer_info *buffer_info = NULL;
1369         struct lan743x_adapter *adapter = tx->adapter;
1370         struct device *dev = &adapter->pdev->dev;
1371         dma_addr_t dma_ptr;
1372
1373         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1374         tx->frame_first = tx->last_tail;
1375         tx->frame_tail = tx->frame_first;
1376
1377         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1378         buffer_info = &tx->buffer_info[tx->frame_tail];
1379         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1380                                  DMA_TO_DEVICE);
1381         if (dma_mapping_error(dev, dma_ptr))
1382                 return -ENOMEM;
1383
1384         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1385         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1386         tx_descriptor->data3 = (frame_length << 16) &
1387                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1388
1389         buffer_info->skb = NULL;
1390         buffer_info->dma_ptr = dma_ptr;
1391         buffer_info->buffer_length = first_buffer_length;
1392         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1393
1394         tx->frame_data0 = (first_buffer_length &
1395                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1396                 TX_DESC_DATA0_DTYPE_DATA_ |
1397                 TX_DESC_DATA0_FS_ |
1398                 TX_DESC_DATA0_FCS_;
1399         if (time_stamp)
1400                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1401
1402         if (check_sum)
1403                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1404                                    TX_DESC_DATA0_IPE_ |
1405                                    TX_DESC_DATA0_TPE_;
1406
1407         /* data0 will be programmed in one of other frame assembler functions */
1408         return 0;
1409 }
1410
1411 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1412                                      unsigned int frame_length)
1413 {
1414         /* called only from within lan743x_tx_xmit_frame.
1415          * assuming tx->ring_lock has already been acquired.
1416          */
1417         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1418         struct lan743x_tx_buffer_info *buffer_info = NULL;
1419
1420         /* wrap up previous descriptor */
1421         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1422         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1423         tx_descriptor->data0 = tx->frame_data0;
1424
1425         /* move to next descriptor */
1426         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1427         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1428         buffer_info = &tx->buffer_info[tx->frame_tail];
1429
1430         /* add extension descriptor */
1431         tx_descriptor->data1 = 0;
1432         tx_descriptor->data2 = 0;
1433         tx_descriptor->data3 = 0;
1434
1435         buffer_info->skb = NULL;
1436         buffer_info->dma_ptr = 0;
1437         buffer_info->buffer_length = 0;
1438         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1439
1440         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1441                           TX_DESC_DATA0_DTYPE_EXT_ |
1442                           TX_DESC_DATA0_EXT_LSO_;
1443
1444         /* data0 will be programmed in one of other frame assembler functions */
1445 }
1446
1447 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1448                                          const struct skb_frag_struct *fragment,
1449                                          unsigned int frame_length)
1450 {
1451         /* called only from within lan743x_tx_xmit_frame
1452          * assuming tx->ring_lock has already been acquired
1453          */
1454         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1455         struct lan743x_tx_buffer_info *buffer_info = NULL;
1456         struct lan743x_adapter *adapter = tx->adapter;
1457         struct device *dev = &adapter->pdev->dev;
1458         unsigned int fragment_length = 0;
1459         dma_addr_t dma_ptr;
1460
1461         fragment_length = skb_frag_size(fragment);
1462         if (!fragment_length)
1463                 return 0;
1464
1465         /* wrap up previous descriptor */
1466         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1467         tx_descriptor->data0 = tx->frame_data0;
1468
1469         /* move to next descriptor */
1470         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1471         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1472         buffer_info = &tx->buffer_info[tx->frame_tail];
1473         dma_ptr = skb_frag_dma_map(dev, fragment,
1474                                    0, fragment_length,
1475                                    DMA_TO_DEVICE);
1476         if (dma_mapping_error(dev, dma_ptr)) {
1477                 int desc_index;
1478
1479                 /* cleanup all previously setup descriptors */
1480                 desc_index = tx->frame_first;
1481                 while (desc_index != tx->frame_tail) {
1482                         lan743x_tx_release_desc(tx, desc_index, true);
1483                         desc_index = lan743x_tx_next_index(tx, desc_index);
1484                 }
1485                 dma_wmb();
1486                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1487                 tx->frame_first = 0;
1488                 tx->frame_data0 = 0;
1489                 tx->frame_tail = 0;
1490                 return -ENOMEM;
1491         }
1492
1493         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1494         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1495         tx_descriptor->data3 = (frame_length << 16) &
1496                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1497
1498         buffer_info->skb = NULL;
1499         buffer_info->dma_ptr = dma_ptr;
1500         buffer_info->buffer_length = fragment_length;
1501         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1502         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1503
1504         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1505                           TX_DESC_DATA0_DTYPE_DATA_ |
1506                           TX_DESC_DATA0_FCS_;
1507
1508         /* data0 will be programmed in one of other frame assembler functions */
1509         return 0;
1510 }
1511
1512 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1513                                  struct sk_buff *skb,
1514                                  bool time_stamp,
1515                                  bool ignore_sync)
1516 {
1517         /* called only from within lan743x_tx_xmit_frame
1518          * assuming tx->ring_lock has already been acquired
1519          */
1520         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1521         struct lan743x_tx_buffer_info *buffer_info = NULL;
1522         struct lan743x_adapter *adapter = tx->adapter;
1523         u32 tx_tail_flags = 0;
1524
1525         /* wrap up previous descriptor */
1526         tx->frame_data0 |= TX_DESC_DATA0_LS_;
1527         tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1528
1529         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1530         buffer_info = &tx->buffer_info[tx->frame_tail];
1531         buffer_info->skb = skb;
1532         if (time_stamp)
1533                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1534         if (ignore_sync)
1535                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1536
1537         tx_descriptor->data0 = tx->frame_data0;
1538         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1539         tx->last_tail = tx->frame_tail;
1540
1541         dma_wmb();
1542
1543         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1544                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1545         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1546                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1547                 TX_TAIL_SET_TOP_INT_EN_;
1548
1549         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1550                           tx_tail_flags | tx->frame_tail);
1551         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1552 }
1553
1554 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1555                                          struct sk_buff *skb)
1556 {
1557         int required_number_of_descriptors = 0;
1558         unsigned int start_frame_length = 0;
1559         unsigned int frame_length = 0;
1560         unsigned int head_length = 0;
1561         unsigned long irq_flags = 0;
1562         bool do_timestamp = false;
1563         bool ignore_sync = false;
1564         int nr_frags = 0;
1565         bool gso = false;
1566         int j;
1567
1568         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1569
1570         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1571         if (required_number_of_descriptors >
1572                 lan743x_tx_get_avail_desc(tx)) {
1573                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1574                         dev_kfree_skb(skb);
1575                 } else {
1576                         /* save to overflow buffer */
1577                         tx->overflow_skb = skb;
1578                         netif_stop_queue(tx->adapter->netdev);
1579                 }
1580                 goto unlock;
1581         }
1582
1583         /* space available, transmit skb  */
1584         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1585             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1586             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1587                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1588                 do_timestamp = true;
1589                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1590                         ignore_sync = true;
1591         }
1592         head_length = skb_headlen(skb);
1593         frame_length = skb_pagelen(skb);
1594         nr_frags = skb_shinfo(skb)->nr_frags;
1595         start_frame_length = frame_length;
1596         gso = skb_is_gso(skb);
1597         if (gso) {
1598                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1599                                          (unsigned short)8);
1600         }
1601
1602         if (lan743x_tx_frame_start(tx,
1603                                    skb->data, head_length,
1604                                    start_frame_length,
1605                                    do_timestamp,
1606                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1607                 dev_kfree_skb(skb);
1608                 goto unlock;
1609         }
1610
1611         if (gso)
1612                 lan743x_tx_frame_add_lso(tx, frame_length);
1613
1614         if (nr_frags <= 0)
1615                 goto finish;
1616
1617         for (j = 0; j < nr_frags; j++) {
1618                 const struct skb_frag_struct *frag;
1619
1620                 frag = &(skb_shinfo(skb)->frags[j]);
1621                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1622                         /* upon error no need to call
1623                          *      lan743x_tx_frame_end
1624                          * frame assembler clean up was performed inside
1625                          *      lan743x_tx_frame_add_fragment
1626                          */
1627                         dev_kfree_skb(skb);
1628                         goto unlock;
1629                 }
1630         }
1631
1632 finish:
1633         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1634
1635 unlock:
1636         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1637         return NETDEV_TX_OK;
1638 }
1639
1640 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1641 {
1642         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1643         struct lan743x_adapter *adapter = tx->adapter;
1644         bool start_transmitter = false;
1645         unsigned long irq_flags = 0;
1646         u32 ioc_bit = 0;
1647         u32 int_sts = 0;
1648
1649         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1650         int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1651         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1652                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1653         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1654
1655         /* clean up tx ring */
1656         lan743x_tx_release_completed_descriptors(tx);
1657         if (netif_queue_stopped(adapter->netdev)) {
1658                 if (tx->overflow_skb) {
1659                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1660                                 lan743x_tx_get_avail_desc(tx))
1661                                 start_transmitter = true;
1662                 } else {
1663                         netif_wake_queue(adapter->netdev);
1664                 }
1665         }
1666         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1667
1668         if (start_transmitter) {
1669                 /* space is now available, transmit overflow skb */
1670                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1671                 tx->overflow_skb = NULL;
1672                 netif_wake_queue(adapter->netdev);
1673         }
1674
1675         if (!napi_complete_done(napi, weight))
1676                 goto done;
1677
1678         /* enable isr */
1679         lan743x_csr_write(adapter, INT_EN_SET,
1680                           INT_BIT_DMA_TX_(tx->channel_number));
1681         lan743x_csr_read(adapter, INT_STS);
1682
1683 done:
1684         return weight;
1685 }
1686
1687 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1688 {
1689         if (tx->head_cpu_ptr) {
1690                 pci_free_consistent(tx->adapter->pdev,
1691                                     sizeof(*tx->head_cpu_ptr),
1692                                     (void *)(tx->head_cpu_ptr),
1693                                     tx->head_dma_ptr);
1694                 tx->head_cpu_ptr = NULL;
1695                 tx->head_dma_ptr = 0;
1696         }
1697         kfree(tx->buffer_info);
1698         tx->buffer_info = NULL;
1699
1700         if (tx->ring_cpu_ptr) {
1701                 pci_free_consistent(tx->adapter->pdev,
1702                                     tx->ring_allocation_size,
1703                                     tx->ring_cpu_ptr,
1704                                     tx->ring_dma_ptr);
1705                 tx->ring_allocation_size = 0;
1706                 tx->ring_cpu_ptr = NULL;
1707                 tx->ring_dma_ptr = 0;
1708         }
1709         tx->ring_size = 0;
1710 }
1711
1712 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1713 {
1714         size_t ring_allocation_size = 0;
1715         void *cpu_ptr = NULL;
1716         dma_addr_t dma_ptr;
1717         int ret = -ENOMEM;
1718
1719         tx->ring_size = LAN743X_TX_RING_SIZE;
1720         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1721                 ret = -EINVAL;
1722                 goto cleanup;
1723         }
1724         ring_allocation_size = ALIGN(tx->ring_size *
1725                                      sizeof(struct lan743x_tx_descriptor),
1726                                      PAGE_SIZE);
1727         dma_ptr = 0;
1728         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1729                                         ring_allocation_size, &dma_ptr);
1730         if (!cpu_ptr) {
1731                 ret = -ENOMEM;
1732                 goto cleanup;
1733         }
1734
1735         tx->ring_allocation_size = ring_allocation_size;
1736         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1737         tx->ring_dma_ptr = dma_ptr;
1738
1739         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1740         if (!cpu_ptr) {
1741                 ret = -ENOMEM;
1742                 goto cleanup;
1743         }
1744         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1745         dma_ptr = 0;
1746         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1747                                         sizeof(*tx->head_cpu_ptr), &dma_ptr);
1748         if (!cpu_ptr) {
1749                 ret = -ENOMEM;
1750                 goto cleanup;
1751         }
1752
1753         tx->head_cpu_ptr = cpu_ptr;
1754         tx->head_dma_ptr = dma_ptr;
1755         if (tx->head_dma_ptr & 0x3) {
1756                 ret = -ENOMEM;
1757                 goto cleanup;
1758         }
1759
1760         return 0;
1761
1762 cleanup:
1763         lan743x_tx_ring_cleanup(tx);
1764         return ret;
1765 }
1766
1767 static void lan743x_tx_close(struct lan743x_tx *tx)
1768 {
1769         struct lan743x_adapter *adapter = tx->adapter;
1770
1771         lan743x_csr_write(adapter,
1772                           DMAC_CMD,
1773                           DMAC_CMD_STOP_T_(tx->channel_number));
1774         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1775
1776         lan743x_csr_write(adapter,
1777                           DMAC_INT_EN_CLR,
1778                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1779         lan743x_csr_write(adapter, INT_EN_CLR,
1780                           INT_BIT_DMA_TX_(tx->channel_number));
1781         napi_disable(&tx->napi);
1782         netif_napi_del(&tx->napi);
1783
1784         lan743x_csr_write(adapter, FCT_TX_CTL,
1785                           FCT_TX_CTL_DIS_(tx->channel_number));
1786         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1787                                  FCT_TX_CTL_EN_(tx->channel_number),
1788                                  0, 1000, 20000, 100);
1789
1790         lan743x_tx_release_all_descriptors(tx);
1791
1792         if (tx->overflow_skb) {
1793                 dev_kfree_skb(tx->overflow_skb);
1794                 tx->overflow_skb = NULL;
1795         }
1796
1797         lan743x_tx_ring_cleanup(tx);
1798 }
1799
1800 static int lan743x_tx_open(struct lan743x_tx *tx)
1801 {
1802         struct lan743x_adapter *adapter = NULL;
1803         u32 data = 0;
1804         int ret;
1805
1806         adapter = tx->adapter;
1807         ret = lan743x_tx_ring_init(tx);
1808         if (ret)
1809                 return ret;
1810
1811         /* initialize fifo */
1812         lan743x_csr_write(adapter, FCT_TX_CTL,
1813                           FCT_TX_CTL_RESET_(tx->channel_number));
1814         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1815                                  FCT_TX_CTL_RESET_(tx->channel_number),
1816                                  0, 1000, 20000, 100);
1817
1818         /* enable fifo */
1819         lan743x_csr_write(adapter, FCT_TX_CTL,
1820                           FCT_TX_CTL_EN_(tx->channel_number));
1821
1822         /* reset tx channel */
1823         lan743x_csr_write(adapter, DMAC_CMD,
1824                           DMAC_CMD_TX_SWR_(tx->channel_number));
1825         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1826                                  DMAC_CMD_TX_SWR_(tx->channel_number),
1827                                  0, 1000, 20000, 100);
1828
1829         /* Write TX_BASE_ADDR */
1830         lan743x_csr_write(adapter,
1831                           TX_BASE_ADDRH(tx->channel_number),
1832                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1833         lan743x_csr_write(adapter,
1834                           TX_BASE_ADDRL(tx->channel_number),
1835                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
1836
1837         /* Write TX_CFG_B */
1838         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1839         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1840         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1841         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1842                 data |= TX_CFG_B_TDMABL_512_;
1843         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1844
1845         /* Write TX_CFG_A */
1846         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1847         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1848                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1849                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1850                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1851                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1852         }
1853         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1854
1855         /* Write TX_HEAD_WRITEBACK_ADDR */
1856         lan743x_csr_write(adapter,
1857                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1858                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
1859         lan743x_csr_write(adapter,
1860                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1861                           DMA_ADDR_LOW32(tx->head_dma_ptr));
1862
1863         /* set last head */
1864         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1865
1866         /* write TX_TAIL */
1867         tx->last_tail = 0;
1868         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1869                           (u32)(tx->last_tail));
1870         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1871                                                          INT_BIT_DMA_TX_
1872                                                          (tx->channel_number));
1873         netif_napi_add(adapter->netdev,
1874                        &tx->napi, lan743x_tx_napi_poll,
1875                        tx->ring_size - 1);
1876         napi_enable(&tx->napi);
1877
1878         data = 0;
1879         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1880                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1881         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1882                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1883         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1884                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1885         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1886                 data |= TX_CFG_C_TX_INT_EN_R2C_;
1887         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1888
1889         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1890                 lan743x_csr_write(adapter, INT_EN_SET,
1891                                   INT_BIT_DMA_TX_(tx->channel_number));
1892         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1893                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1894
1895         /*  start dmac channel */
1896         lan743x_csr_write(adapter, DMAC_CMD,
1897                           DMAC_CMD_START_T_(tx->channel_number));
1898         return 0;
1899 }
1900
1901 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1902 {
1903         return ((++index) % rx->ring_size);
1904 }
1905
1906 static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1907 {
1908         struct lan743x_rx_buffer_info *buffer_info;
1909         struct lan743x_rx_descriptor *descriptor;
1910         int length = 0;
1911
1912         length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1913         descriptor = &rx->ring_cpu_ptr[index];
1914         buffer_info = &rx->buffer_info[index];
1915         buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1916                                               length,
1917                                               GFP_ATOMIC | GFP_DMA);
1918         if (!(buffer_info->skb))
1919                 return -ENOMEM;
1920         buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1921                                               buffer_info->skb->data,
1922                                               length,
1923                                               DMA_FROM_DEVICE);
1924         if (dma_mapping_error(&rx->adapter->pdev->dev,
1925                               buffer_info->dma_ptr)) {
1926                 buffer_info->dma_ptr = 0;
1927                 return -ENOMEM;
1928         }
1929
1930         buffer_info->buffer_length = length;
1931         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1932         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1933         descriptor->data3 = 0;
1934         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1935                             (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1936         skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1937
1938         return 0;
1939 }
1940
1941 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1942 {
1943         struct lan743x_rx_buffer_info *buffer_info;
1944         struct lan743x_rx_descriptor *descriptor;
1945
1946         descriptor = &rx->ring_cpu_ptr[index];
1947         buffer_info = &rx->buffer_info[index];
1948
1949         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1950         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1951         descriptor->data3 = 0;
1952         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1953                             ((buffer_info->buffer_length) &
1954                             RX_DESC_DATA0_BUF_LENGTH_MASK_));
1955 }
1956
1957 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1958 {
1959         struct lan743x_rx_buffer_info *buffer_info;
1960         struct lan743x_rx_descriptor *descriptor;
1961
1962         descriptor = &rx->ring_cpu_ptr[index];
1963         buffer_info = &rx->buffer_info[index];
1964
1965         memset(descriptor, 0, sizeof(*descriptor));
1966
1967         if (buffer_info->dma_ptr) {
1968                 dma_unmap_single(&rx->adapter->pdev->dev,
1969                                  buffer_info->dma_ptr,
1970                                  buffer_info->buffer_length,
1971                                  DMA_FROM_DEVICE);
1972                 buffer_info->dma_ptr = 0;
1973         }
1974
1975         if (buffer_info->skb) {
1976                 dev_kfree_skb(buffer_info->skb);
1977                 buffer_info->skb = NULL;
1978         }
1979
1980         memset(buffer_info, 0, sizeof(*buffer_info));
1981 }
1982
1983 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1984 {
1985         struct skb_shared_hwtstamps *hwtstamps = NULL;
1986         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1987         struct lan743x_rx_buffer_info *buffer_info;
1988         struct lan743x_rx_descriptor *descriptor;
1989         int current_head_index = -1;
1990         int extension_index = -1;
1991         int first_index = -1;
1992         int last_index = -1;
1993
1994         current_head_index = *rx->head_cpu_ptr;
1995         if (current_head_index < 0 || current_head_index >= rx->ring_size)
1996                 goto done;
1997
1998         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
1999                 goto done;
2000
2001         if (rx->last_head != current_head_index) {
2002                 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2003                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2004                         goto done;
2005
2006                 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
2007                         goto done;
2008
2009                 first_index = rx->last_head;
2010                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2011                         last_index = rx->last_head;
2012                 } else {
2013                         int index;
2014
2015                         index = lan743x_rx_next_index(rx, first_index);
2016                         while (index != current_head_index) {
2017                                 descriptor = &rx->ring_cpu_ptr[index];
2018                                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2019                                         goto done;
2020
2021                                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2022                                         last_index = index;
2023                                         break;
2024                                 }
2025                                 index = lan743x_rx_next_index(rx, index);
2026                         }
2027                 }
2028                 if (last_index >= 0) {
2029                         descriptor = &rx->ring_cpu_ptr[last_index];
2030                         if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2031                                 /* extension is expected to follow */
2032                                 int index = lan743x_rx_next_index(rx,
2033                                                                   last_index);
2034                                 if (index != current_head_index) {
2035                                         descriptor = &rx->ring_cpu_ptr[index];
2036                                         if (descriptor->data0 &
2037                                             RX_DESC_DATA0_OWN_) {
2038                                                 goto done;
2039                                         }
2040                                         if (descriptor->data0 &
2041                                             RX_DESC_DATA0_EXT_) {
2042                                                 extension_index = index;
2043                                         } else {
2044                                                 goto done;
2045                                         }
2046                                 } else {
2047                                         /* extension is not yet available */
2048                                         /* prevent processing of this packet */
2049                                         first_index = -1;
2050                                         last_index = -1;
2051                                 }
2052                         }
2053                 }
2054         }
2055         if (first_index >= 0 && last_index >= 0) {
2056                 int real_last_index = last_index;
2057                 struct sk_buff *skb = NULL;
2058                 u32 ts_sec = 0;
2059                 u32 ts_nsec = 0;
2060
2061                 /* packet is available */
2062                 if (first_index == last_index) {
2063                         /* single buffer packet */
2064                         int packet_length;
2065
2066                         buffer_info = &rx->buffer_info[first_index];
2067                         skb = buffer_info->skb;
2068                         descriptor = &rx->ring_cpu_ptr[first_index];
2069
2070                         /* unmap from dma */
2071                         if (buffer_info->dma_ptr) {
2072                                 dma_unmap_single(&rx->adapter->pdev->dev,
2073                                                  buffer_info->dma_ptr,
2074                                                  buffer_info->buffer_length,
2075                                                  DMA_FROM_DEVICE);
2076                                 buffer_info->dma_ptr = 0;
2077                                 buffer_info->buffer_length = 0;
2078                         }
2079                         buffer_info->skb = NULL;
2080                         packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2081                                         (descriptor->data0);
2082                         skb_put(skb, packet_length - 4);
2083                         skb->protocol = eth_type_trans(skb,
2084                                                        rx->adapter->netdev);
2085                         lan743x_rx_allocate_ring_element(rx, first_index);
2086                 } else {
2087                         int index = first_index;
2088
2089                         /* multi buffer packet not supported */
2090                         /* this should not happen since
2091                          * buffers are allocated to be at least jumbo size
2092                          */
2093
2094                         /* clean up buffers */
2095                         if (first_index <= last_index) {
2096                                 while ((index >= first_index) &&
2097                                        (index <= last_index)) {
2098                                         lan743x_rx_release_ring_element(rx,
2099                                                                         index);
2100                                         lan743x_rx_allocate_ring_element(rx,
2101                                                                          index);
2102                                         index = lan743x_rx_next_index(rx,
2103                                                                       index);
2104                                 }
2105                         } else {
2106                                 while ((index >= first_index) ||
2107                                        (index <= last_index)) {
2108                                         lan743x_rx_release_ring_element(rx,
2109                                                                         index);
2110                                         lan743x_rx_allocate_ring_element(rx,
2111                                                                          index);
2112                                         index = lan743x_rx_next_index(rx,
2113                                                                       index);
2114                                 }
2115                         }
2116                 }
2117
2118                 if (extension_index >= 0) {
2119                         descriptor = &rx->ring_cpu_ptr[extension_index];
2120                         buffer_info = &rx->buffer_info[extension_index];
2121
2122                         ts_sec = descriptor->data1;
2123                         ts_nsec = (descriptor->data2 &
2124                                   RX_DESC_DATA2_TS_NS_MASK_);
2125                         lan743x_rx_reuse_ring_element(rx, extension_index);
2126                         real_last_index = extension_index;
2127                 }
2128
2129                 if (!skb) {
2130                         result = RX_PROCESS_RESULT_PACKET_DROPPED;
2131                         goto move_forward;
2132                 }
2133
2134                 if (extension_index < 0)
2135                         goto pass_packet_to_os;
2136                 hwtstamps = skb_hwtstamps(skb);
2137                 if (hwtstamps)
2138                         hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2139
2140 pass_packet_to_os:
2141                 /* pass packet to OS */
2142                 napi_gro_receive(&rx->napi, skb);
2143                 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2144
2145 move_forward:
2146                 /* push tail and head forward */
2147                 rx->last_tail = real_last_index;
2148                 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2149         }
2150 done:
2151         return result;
2152 }
2153
2154 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2155 {
2156         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2157         struct lan743x_adapter *adapter = rx->adapter;
2158         u32 rx_tail_flags = 0;
2159         int count;
2160
2161         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2162                 /* clear int status bit before reading packet */
2163                 lan743x_csr_write(adapter, DMAC_INT_STS,
2164                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2165         }
2166         count = 0;
2167         while (count < weight) {
2168                 int rx_process_result = -1;
2169
2170                 rx_process_result = lan743x_rx_process_packet(rx);
2171                 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2172                         count++;
2173                 } else if (rx_process_result ==
2174                         RX_PROCESS_RESULT_NOTHING_TO_DO) {
2175                         break;
2176                 } else if (rx_process_result ==
2177                         RX_PROCESS_RESULT_PACKET_DROPPED) {
2178                         continue;
2179                 }
2180         }
2181         rx->frame_count += count;
2182         if (count == weight)
2183                 goto done;
2184
2185         if (!napi_complete_done(napi, count))
2186                 goto done;
2187
2188         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2189                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2190         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2191                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2192         } else {
2193                 lan743x_csr_write(adapter, INT_EN_SET,
2194                                   INT_BIT_DMA_RX_(rx->channel_number));
2195         }
2196
2197         /* update RX_TAIL */
2198         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2199                           rx_tail_flags | rx->last_tail);
2200 done:
2201         return count;
2202 }
2203
2204 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2205 {
2206         if (rx->buffer_info && rx->ring_cpu_ptr) {
2207                 int index;
2208
2209                 for (index = 0; index < rx->ring_size; index++)
2210                         lan743x_rx_release_ring_element(rx, index);
2211         }
2212
2213         if (rx->head_cpu_ptr) {
2214                 pci_free_consistent(rx->adapter->pdev,
2215                                     sizeof(*rx->head_cpu_ptr),
2216                                     rx->head_cpu_ptr,
2217                                     rx->head_dma_ptr);
2218                 rx->head_cpu_ptr = NULL;
2219                 rx->head_dma_ptr = 0;
2220         }
2221
2222         kfree(rx->buffer_info);
2223         rx->buffer_info = NULL;
2224
2225         if (rx->ring_cpu_ptr) {
2226                 pci_free_consistent(rx->adapter->pdev,
2227                                     rx->ring_allocation_size,
2228                                     rx->ring_cpu_ptr,
2229                                     rx->ring_dma_ptr);
2230                 rx->ring_allocation_size = 0;
2231                 rx->ring_cpu_ptr = NULL;
2232                 rx->ring_dma_ptr = 0;
2233         }
2234
2235         rx->ring_size = 0;
2236         rx->last_head = 0;
2237 }
2238
2239 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2240 {
2241         size_t ring_allocation_size = 0;
2242         dma_addr_t dma_ptr = 0;
2243         void *cpu_ptr = NULL;
2244         int ret = -ENOMEM;
2245         int index = 0;
2246
2247         rx->ring_size = LAN743X_RX_RING_SIZE;
2248         if (rx->ring_size <= 1) {
2249                 ret = -EINVAL;
2250                 goto cleanup;
2251         }
2252         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2253                 ret = -EINVAL;
2254                 goto cleanup;
2255         }
2256         ring_allocation_size = ALIGN(rx->ring_size *
2257                                      sizeof(struct lan743x_rx_descriptor),
2258                                      PAGE_SIZE);
2259         dma_ptr = 0;
2260         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2261                                         ring_allocation_size, &dma_ptr);
2262         if (!cpu_ptr) {
2263                 ret = -ENOMEM;
2264                 goto cleanup;
2265         }
2266         rx->ring_allocation_size = ring_allocation_size;
2267         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2268         rx->ring_dma_ptr = dma_ptr;
2269
2270         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2271                           GFP_KERNEL);
2272         if (!cpu_ptr) {
2273                 ret = -ENOMEM;
2274                 goto cleanup;
2275         }
2276         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2277         dma_ptr = 0;
2278         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2279                                         sizeof(*rx->head_cpu_ptr), &dma_ptr);
2280         if (!cpu_ptr) {
2281                 ret = -ENOMEM;
2282                 goto cleanup;
2283         }
2284
2285         rx->head_cpu_ptr = cpu_ptr;
2286         rx->head_dma_ptr = dma_ptr;
2287         if (rx->head_dma_ptr & 0x3) {
2288                 ret = -ENOMEM;
2289                 goto cleanup;
2290         }
2291
2292         rx->last_head = 0;
2293         for (index = 0; index < rx->ring_size; index++) {
2294                 ret = lan743x_rx_allocate_ring_element(rx, index);
2295                 if (ret)
2296                         goto cleanup;
2297         }
2298         return 0;
2299
2300 cleanup:
2301         lan743x_rx_ring_cleanup(rx);
2302         return ret;
2303 }
2304
2305 static void lan743x_rx_close(struct lan743x_rx *rx)
2306 {
2307         struct lan743x_adapter *adapter = rx->adapter;
2308
2309         lan743x_csr_write(adapter, FCT_RX_CTL,
2310                           FCT_RX_CTL_DIS_(rx->channel_number));
2311         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2312                                  FCT_RX_CTL_EN_(rx->channel_number),
2313                                  0, 1000, 20000, 100);
2314
2315         lan743x_csr_write(adapter, DMAC_CMD,
2316                           DMAC_CMD_STOP_R_(rx->channel_number));
2317         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2318
2319         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2320                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2321         lan743x_csr_write(adapter, INT_EN_CLR,
2322                           INT_BIT_DMA_RX_(rx->channel_number));
2323         napi_disable(&rx->napi);
2324
2325         netif_napi_del(&rx->napi);
2326
2327         lan743x_rx_ring_cleanup(rx);
2328 }
2329
2330 static int lan743x_rx_open(struct lan743x_rx *rx)
2331 {
2332         struct lan743x_adapter *adapter = rx->adapter;
2333         u32 data = 0;
2334         int ret;
2335
2336         rx->frame_count = 0;
2337         ret = lan743x_rx_ring_init(rx);
2338         if (ret)
2339                 goto return_error;
2340
2341         netif_napi_add(adapter->netdev,
2342                        &rx->napi, lan743x_rx_napi_poll,
2343                        rx->ring_size - 1);
2344
2345         lan743x_csr_write(adapter, DMAC_CMD,
2346                           DMAC_CMD_RX_SWR_(rx->channel_number));
2347         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2348                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2349                                  0, 1000, 20000, 100);
2350
2351         /* set ring base address */
2352         lan743x_csr_write(adapter,
2353                           RX_BASE_ADDRH(rx->channel_number),
2354                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2355         lan743x_csr_write(adapter,
2356                           RX_BASE_ADDRL(rx->channel_number),
2357                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2358
2359         /* set rx write back address */
2360         lan743x_csr_write(adapter,
2361                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2362                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2363         lan743x_csr_write(adapter,
2364                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2365                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2366         data = RX_CFG_A_RX_HP_WB_EN_;
2367         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2368                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2369                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2370                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2371                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2372         }
2373
2374         /* set RX_CFG_A */
2375         lan743x_csr_write(adapter,
2376                           RX_CFG_A(rx->channel_number), data);
2377
2378         /* set RX_CFG_B */
2379         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2380         data &= ~RX_CFG_B_RX_PAD_MASK_;
2381         if (!RX_HEAD_PADDING)
2382                 data |= RX_CFG_B_RX_PAD_0_;
2383         else
2384                 data |= RX_CFG_B_RX_PAD_2_;
2385         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2386         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2387         data |= RX_CFG_B_TS_ALL_RX_;
2388         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2389                 data |= RX_CFG_B_RDMABL_512_;
2390
2391         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2392         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2393                                                          INT_BIT_DMA_RX_
2394                                                          (rx->channel_number));
2395
2396         /* set RX_CFG_C */
2397         data = 0;
2398         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2399                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2400         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2401                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2402         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2403                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2404         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2405                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2406         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2407
2408         rx->last_tail = ((u32)(rx->ring_size - 1));
2409         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2410                           rx->last_tail);
2411         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2412         if (rx->last_head) {
2413                 ret = -EIO;
2414                 goto napi_delete;
2415         }
2416
2417         napi_enable(&rx->napi);
2418
2419         lan743x_csr_write(adapter, INT_EN_SET,
2420                           INT_BIT_DMA_RX_(rx->channel_number));
2421         lan743x_csr_write(adapter, DMAC_INT_STS,
2422                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2423         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2424                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2425         lan743x_csr_write(adapter, DMAC_CMD,
2426                           DMAC_CMD_START_R_(rx->channel_number));
2427
2428         /* initialize fifo */
2429         lan743x_csr_write(adapter, FCT_RX_CTL,
2430                           FCT_RX_CTL_RESET_(rx->channel_number));
2431         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2432                                  FCT_RX_CTL_RESET_(rx->channel_number),
2433                                  0, 1000, 20000, 100);
2434         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2435                           FCT_FLOW_CTL_REQ_EN_ |
2436                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2437                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2438
2439         /* enable fifo */
2440         lan743x_csr_write(adapter, FCT_RX_CTL,
2441                           FCT_RX_CTL_EN_(rx->channel_number));
2442         return 0;
2443
2444 napi_delete:
2445         netif_napi_del(&rx->napi);
2446         lan743x_rx_ring_cleanup(rx);
2447
2448 return_error:
2449         return ret;
2450 }
2451
2452 static int lan743x_netdev_close(struct net_device *netdev)
2453 {
2454         struct lan743x_adapter *adapter = netdev_priv(netdev);
2455         int index;
2456
2457         lan743x_tx_close(&adapter->tx[0]);
2458
2459         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2460                 lan743x_rx_close(&adapter->rx[index]);
2461
2462         lan743x_ptp_close(adapter);
2463
2464         lan743x_phy_close(adapter);
2465
2466         lan743x_mac_close(adapter);
2467
2468         lan743x_intr_close(adapter);
2469
2470         return 0;
2471 }
2472
2473 static int lan743x_netdev_open(struct net_device *netdev)
2474 {
2475         struct lan743x_adapter *adapter = netdev_priv(netdev);
2476         int index;
2477         int ret;
2478
2479         ret = lan743x_intr_open(adapter);
2480         if (ret)
2481                 goto return_error;
2482
2483         ret = lan743x_mac_open(adapter);
2484         if (ret)
2485                 goto close_intr;
2486
2487         ret = lan743x_phy_open(adapter);
2488         if (ret)
2489                 goto close_mac;
2490
2491         ret = lan743x_ptp_open(adapter);
2492         if (ret)
2493                 goto close_phy;
2494
2495         lan743x_rfe_open(adapter);
2496
2497         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2498                 ret = lan743x_rx_open(&adapter->rx[index]);
2499                 if (ret)
2500                         goto close_rx;
2501         }
2502
2503         ret = lan743x_tx_open(&adapter->tx[0]);
2504         if (ret)
2505                 goto close_rx;
2506
2507         return 0;
2508
2509 close_rx:
2510         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2511                 if (adapter->rx[index].ring_cpu_ptr)
2512                         lan743x_rx_close(&adapter->rx[index]);
2513         }
2514         lan743x_ptp_close(adapter);
2515
2516 close_phy:
2517         lan743x_phy_close(adapter);
2518
2519 close_mac:
2520         lan743x_mac_close(adapter);
2521
2522 close_intr:
2523         lan743x_intr_close(adapter);
2524
2525 return_error:
2526         netif_warn(adapter, ifup, adapter->netdev,
2527                    "Error opening LAN743x\n");
2528         return ret;
2529 }
2530
2531 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2532                                              struct net_device *netdev)
2533 {
2534         struct lan743x_adapter *adapter = netdev_priv(netdev);
2535
2536         return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2537 }
2538
2539 static int lan743x_netdev_ioctl(struct net_device *netdev,
2540                                 struct ifreq *ifr, int cmd)
2541 {
2542         if (!netif_running(netdev))
2543                 return -EINVAL;
2544         if (cmd == SIOCSHWTSTAMP)
2545                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2546         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2547 }
2548
2549 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2550 {
2551         struct lan743x_adapter *adapter = netdev_priv(netdev);
2552
2553         lan743x_rfe_set_multicast(adapter);
2554 }
2555
2556 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2557 {
2558         struct lan743x_adapter *adapter = netdev_priv(netdev);
2559         int ret = 0;
2560
2561         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2562         if (!ret)
2563                 netdev->mtu = new_mtu;
2564         return ret;
2565 }
2566
2567 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2568                                        struct rtnl_link_stats64 *stats)
2569 {
2570         struct lan743x_adapter *adapter = netdev_priv(netdev);
2571
2572         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2573         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2574         stats->rx_bytes = lan743x_csr_read(adapter,
2575                                            STAT_RX_UNICAST_BYTE_COUNT) +
2576                           lan743x_csr_read(adapter,
2577                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2578                           lan743x_csr_read(adapter,
2579                                            STAT_RX_MULTICAST_BYTE_COUNT);
2580         stats->tx_bytes = lan743x_csr_read(adapter,
2581                                            STAT_TX_UNICAST_BYTE_COUNT) +
2582                           lan743x_csr_read(adapter,
2583                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2584                           lan743x_csr_read(adapter,
2585                                            STAT_TX_MULTICAST_BYTE_COUNT);
2586         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2587                            lan743x_csr_read(adapter,
2588                                             STAT_RX_ALIGNMENT_ERRORS) +
2589                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2590                            lan743x_csr_read(adapter,
2591                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2592                            lan743x_csr_read(adapter,
2593                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2594         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2595                            lan743x_csr_read(adapter,
2596                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2597                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2598         stats->rx_dropped = lan743x_csr_read(adapter,
2599                                              STAT_RX_DROPPED_FRAMES);
2600         stats->tx_dropped = lan743x_csr_read(adapter,
2601                                              STAT_TX_EXCESSIVE_COLLISION);
2602         stats->multicast = lan743x_csr_read(adapter,
2603                                             STAT_RX_MULTICAST_FRAMES) +
2604                            lan743x_csr_read(adapter,
2605                                             STAT_TX_MULTICAST_FRAMES);
2606         stats->collisions = lan743x_csr_read(adapter,
2607                                              STAT_TX_SINGLE_COLLISIONS) +
2608                             lan743x_csr_read(adapter,
2609                                              STAT_TX_MULTIPLE_COLLISIONS) +
2610                             lan743x_csr_read(adapter,
2611                                              STAT_TX_LATE_COLLISIONS);
2612 }
2613
2614 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2615                                           void *addr)
2616 {
2617         struct lan743x_adapter *adapter = netdev_priv(netdev);
2618         struct sockaddr *sock_addr = addr;
2619         int ret;
2620
2621         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2622         if (ret)
2623                 return ret;
2624         ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2625         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2626         lan743x_rfe_update_mac_address(adapter);
2627         return 0;
2628 }
2629
2630 static const struct net_device_ops lan743x_netdev_ops = {
2631         .ndo_open               = lan743x_netdev_open,
2632         .ndo_stop               = lan743x_netdev_close,
2633         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2634         .ndo_do_ioctl           = lan743x_netdev_ioctl,
2635         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2636         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2637         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2638         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2639 };
2640
2641 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2642 {
2643         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2644 }
2645
2646 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2647 {
2648         mdiobus_unregister(adapter->mdiobus);
2649 }
2650
2651 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2652 {
2653         unregister_netdev(adapter->netdev);
2654
2655         lan743x_mdiobus_cleanup(adapter);
2656         lan743x_hardware_cleanup(adapter);
2657         lan743x_pci_cleanup(adapter);
2658 }
2659
2660 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2661                                  struct pci_dev *pdev)
2662 {
2663         struct lan743x_tx *tx;
2664         int index;
2665         int ret;
2666
2667         adapter->intr.irq = adapter->pdev->irq;
2668         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2669         mutex_init(&adapter->dp_lock);
2670
2671         ret = lan743x_gpio_init(adapter);
2672         if (ret)
2673                 return ret;
2674
2675         ret = lan743x_mac_init(adapter);
2676         if (ret)
2677                 return ret;
2678
2679         ret = lan743x_phy_init(adapter);
2680         if (ret)
2681                 return ret;
2682
2683         ret = lan743x_ptp_init(adapter);
2684         if (ret)
2685                 return ret;
2686
2687         lan743x_rfe_update_mac_address(adapter);
2688
2689         ret = lan743x_dmac_init(adapter);
2690         if (ret)
2691                 return ret;
2692
2693         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2694                 adapter->rx[index].adapter = adapter;
2695                 adapter->rx[index].channel_number = index;
2696         }
2697
2698         tx = &adapter->tx[0];
2699         tx->adapter = adapter;
2700         tx->channel_number = 0;
2701         spin_lock_init(&tx->ring_lock);
2702         return 0;
2703 }
2704
2705 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2706 {
2707         int ret;
2708
2709         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2710         if (!(adapter->mdiobus)) {
2711                 ret = -ENOMEM;
2712                 goto return_error;
2713         }
2714
2715         adapter->mdiobus->priv = (void *)adapter;
2716         adapter->mdiobus->read = lan743x_mdiobus_read;
2717         adapter->mdiobus->write = lan743x_mdiobus_write;
2718         adapter->mdiobus->name = "lan743x-mdiobus";
2719         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2720                  "pci-%s", pci_name(adapter->pdev));
2721
2722         /* set to internal PHY id */
2723         adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2724
2725         /* register mdiobus */
2726         ret = mdiobus_register(adapter->mdiobus);
2727         if (ret < 0)
2728                 goto return_error;
2729         return 0;
2730
2731 return_error:
2732         return ret;
2733 }
2734
2735 /* lan743x_pcidev_probe - Device Initialization Routine
2736  * @pdev: PCI device information struct
2737  * @id: entry in lan743x_pci_tbl
2738  *
2739  * Returns 0 on success, negative on failure
2740  *
2741  * initializes an adapter identified by a pci_dev structure.
2742  * The OS initialization, configuring of the adapter private structure,
2743  * and a hardware reset occur.
2744  **/
2745 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2746                                 const struct pci_device_id *id)
2747 {
2748         struct lan743x_adapter *adapter = NULL;
2749         struct net_device *netdev = NULL;
2750         int ret = -ENODEV;
2751
2752         netdev = devm_alloc_etherdev(&pdev->dev,
2753                                      sizeof(struct lan743x_adapter));
2754         if (!netdev)
2755                 goto return_error;
2756
2757         SET_NETDEV_DEV(netdev, &pdev->dev);
2758         pci_set_drvdata(pdev, netdev);
2759         adapter = netdev_priv(netdev);
2760         adapter->netdev = netdev;
2761         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2762                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
2763                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2764         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2765
2766         ret = lan743x_pci_init(adapter, pdev);
2767         if (ret)
2768                 goto return_error;
2769
2770         ret = lan743x_csr_init(adapter);
2771         if (ret)
2772                 goto cleanup_pci;
2773
2774         ret = lan743x_hardware_init(adapter, pdev);
2775         if (ret)
2776                 goto cleanup_pci;
2777
2778         ret = lan743x_mdiobus_init(adapter);
2779         if (ret)
2780                 goto cleanup_hardware;
2781
2782         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2783         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2784         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2785         adapter->netdev->hw_features = adapter->netdev->features;
2786
2787         /* carrier off reporting is important to ethtool even BEFORE open */
2788         netif_carrier_off(netdev);
2789
2790         ret = register_netdev(adapter->netdev);
2791         if (ret < 0)
2792                 goto cleanup_mdiobus;
2793         return 0;
2794
2795 cleanup_mdiobus:
2796         lan743x_mdiobus_cleanup(adapter);
2797
2798 cleanup_hardware:
2799         lan743x_hardware_cleanup(adapter);
2800
2801 cleanup_pci:
2802         lan743x_pci_cleanup(adapter);
2803
2804 return_error:
2805         pr_warn("Initialization failed\n");
2806         return ret;
2807 }
2808
2809 /**
2810  * lan743x_pcidev_remove - Device Removal Routine
2811  * @pdev: PCI device information struct
2812  *
2813  * this is called by the PCI subsystem to alert the driver
2814  * that it should release a PCI device.  This could be caused by a
2815  * Hot-Plug event, or because the driver is going to be removed from
2816  * memory.
2817  **/
2818 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2819 {
2820         struct net_device *netdev = pci_get_drvdata(pdev);
2821         struct lan743x_adapter *adapter = netdev_priv(netdev);
2822
2823         lan743x_full_cleanup(adapter);
2824 }
2825
2826 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2827 {
2828         struct net_device *netdev = pci_get_drvdata(pdev);
2829         struct lan743x_adapter *adapter = netdev_priv(netdev);
2830
2831         rtnl_lock();
2832         netif_device_detach(netdev);
2833
2834         /* close netdev when netdev is at running state.
2835          * For instance, it is true when system goes to sleep by pm-suspend
2836          * However, it is false when system goes to sleep by suspend GUI menu
2837          */
2838         if (netif_running(netdev))
2839                 lan743x_netdev_close(netdev);
2840         rtnl_unlock();
2841
2842 #ifdef CONFIG_PM
2843         pci_save_state(pdev);
2844 #endif
2845
2846         /* clean up lan743x portion */
2847         lan743x_hardware_cleanup(adapter);
2848 }
2849
2850 #ifdef CONFIG_PM_SLEEP
2851 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2852 {
2853         return bitrev16(crc16(0xFFFF, buf, len));
2854 }
2855
2856 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2857 {
2858         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2859         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2860         const u8 arp_type[2] = { 0x08, 0x06 };
2861         int mask_index;
2862         u32 pmtctl;
2863         u32 wucsr;
2864         u32 macrx;
2865         u16 crc;
2866
2867         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2868                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2869
2870         /* clear wake settings */
2871         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2872         pmtctl |= PMT_CTL_WUPS_MASK_;
2873         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2874                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2875                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2876
2877         macrx = lan743x_csr_read(adapter, MAC_RX);
2878
2879         wucsr = 0;
2880         mask_index = 0;
2881
2882         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2883
2884         if (adapter->wolopts & WAKE_PHY) {
2885                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2886                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2887         }
2888         if (adapter->wolopts & WAKE_MAGIC) {
2889                 wucsr |= MAC_WUCSR_MPEN_;
2890                 macrx |= MAC_RX_RXEN_;
2891                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2892         }
2893         if (adapter->wolopts & WAKE_UCAST) {
2894                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2895                 macrx |= MAC_RX_RXEN_;
2896                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2897                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2898         }
2899         if (adapter->wolopts & WAKE_BCAST) {
2900                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2901                 macrx |= MAC_RX_RXEN_;
2902                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2903                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2904         }
2905         if (adapter->wolopts & WAKE_MCAST) {
2906                 /* IPv4 multicast */
2907                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2908                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2909                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2910                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2911                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2912                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2913                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2914                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2915                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2916                 mask_index++;
2917
2918                 /* IPv6 multicast */
2919                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2920                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2921                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2922                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2923                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2924                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2925                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2926                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2927                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2928                 mask_index++;
2929
2930                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2931                 macrx |= MAC_RX_RXEN_;
2932                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2933                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2934         }
2935         if (adapter->wolopts & WAKE_ARP) {
2936                 /* set MAC_WUF_CFG & WUF_MASK
2937                  * for packettype (offset 12,13) = ARP (0x0806)
2938                  */
2939                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2940                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2941                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2942                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2943                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2944                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2945                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2946                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2947                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2948                 mask_index++;
2949
2950                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2951                 macrx |= MAC_RX_RXEN_;
2952                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2953                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2954         }
2955
2956         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2957         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2958         lan743x_csr_write(adapter, MAC_RX, macrx);
2959 }
2960
2961 static int lan743x_pm_suspend(struct device *dev)
2962 {
2963         struct pci_dev *pdev = to_pci_dev(dev);
2964         struct net_device *netdev = pci_get_drvdata(pdev);
2965         struct lan743x_adapter *adapter = netdev_priv(netdev);
2966         int ret;
2967
2968         lan743x_pcidev_shutdown(pdev);
2969
2970         /* clear all wakes */
2971         lan743x_csr_write(adapter, MAC_WUCSR, 0);
2972         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2973         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
2974
2975         if (adapter->wolopts)
2976                 lan743x_pm_set_wol(adapter);
2977
2978         /* Host sets PME_En, put D3hot */
2979         ret = pci_prepare_to_sleep(pdev);
2980
2981         return 0;
2982 }
2983
2984 static int lan743x_pm_resume(struct device *dev)
2985 {
2986         struct pci_dev *pdev = to_pci_dev(dev);
2987         struct net_device *netdev = pci_get_drvdata(pdev);
2988         struct lan743x_adapter *adapter = netdev_priv(netdev);
2989         int ret;
2990
2991         pci_set_power_state(pdev, PCI_D0);
2992         pci_restore_state(pdev);
2993         pci_save_state(pdev);
2994
2995         ret = lan743x_hardware_init(adapter, pdev);
2996         if (ret) {
2997                 netif_err(adapter, probe, adapter->netdev,
2998                           "lan743x_hardware_init returned %d\n", ret);
2999         }
3000
3001         /* open netdev when netdev is at running state while resume.
3002          * For instance, it is true when system wakesup after pm-suspend
3003          * However, it is false when system wakes up after suspend GUI menu
3004          */
3005         if (netif_running(netdev))
3006                 lan743x_netdev_open(netdev);
3007
3008         netif_device_attach(netdev);
3009
3010         return 0;
3011 }
3012
3013 static const struct dev_pm_ops lan743x_pm_ops = {
3014         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3015 };
3016 #endif /* CONFIG_PM_SLEEP */
3017
3018 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3019         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3020         { 0, }
3021 };
3022
3023 static struct pci_driver lan743x_pcidev_driver = {
3024         .name     = DRIVER_NAME,
3025         .id_table = lan743x_pcidev_tbl,
3026         .probe    = lan743x_pcidev_probe,
3027         .remove   = lan743x_pcidev_remove,
3028 #ifdef CONFIG_PM_SLEEP
3029         .driver.pm = &lan743x_pm_ops,
3030 #endif
3031         .shutdown = lan743x_pcidev_shutdown,
3032 };
3033
3034 module_pci_driver(lan743x_pcidev_driver);
3035
3036 MODULE_AUTHOR(DRIVER_AUTHOR);
3037 MODULE_DESCRIPTION(DRIVER_DESC);
3038 MODULE_LICENSE("GPL");