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