drivers/net/ethernet/microchip/lan743x_main.c

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /* Copyright (C) 2018 Microchip Technology Inc. */
   3
   4 #include <linux/module.h>
   5 #include <linux/pci.h>
   6 #include <linux/netdevice.h>
   7 #include <linux/etherdevice.h>
   8 #include <linux/crc32.h>
   9 #include <linux/microchipphy.h>
  10 #include <linux/net_tstamp.h>
  11 #include <linux/phy.h>
  12 #include <linux/rtnetlink.h>
  13 #include <linux/iopoll.h>
  14 #include <linux/crc16.h>
  15 #include "lan743x_main.h"
  16 #include "lan743x_ethtool.h"
  17
  18 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  19 {
  20         pci_release_selected_regions(adapter->pdev,
  21                                      pci_select_bars(adapter->pdev,
  22                                                      IORESOURCE_MEM));
  23         pci_disable_device(adapter->pdev);
  24 }
  25
  26 static int lan743x_pci_init(struct lan743x_adapter *adapter,
  27                             struct pci_dev *pdev)
  28 {
  29         unsigned long bars = 0;
  30         int ret;
  31
  32         adapter->pdev = pdev;
  33         ret = pci_enable_device_mem(pdev);
  34         if (ret)
  35                 goto return_error;
  36
  37         netif_info(adapter, probe, adapter->netdev,
  38                    "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
  39                    pdev->vendor, pdev->device);
  40         bars = pci_select_bars(pdev, IORESOURCE_MEM);
  41         if (!test_bit(0, &bars))
  42                 goto disable_device;
  43
  44         ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
  45         if (ret)
  46                 goto disable_device;
  47
  48         pci_set_master(pdev);
  49         return 0;
  50
  51 disable_device:
  52         pci_disable_device(adapter->pdev);
  53
  54 return_error:
  55         return ret;
  56 }
  57
  58 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
  59 {
  60         return ioread32(&adapter->csr.csr_address[offset]);
  61 }
  62
  63 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
  64                        u32 data)
  65 {
  66         iowrite32(data, &adapter->csr.csr_address[offset]);
  67 }
  68
  69 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
  70
  71 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
  72 {
  73         u32 data;
  74
  75         data = lan743x_csr_read(adapter, HW_CFG);
  76         data |= HW_CFG_LRST_;
  77         lan743x_csr_write(adapter, HW_CFG, data);
  78
  79         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
  80                                   !(data & HW_CFG_LRST_), 100000, 10000000);
  81 }
  82
  83 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
  84                                     int offset, u32 bit_mask,
  85                                     int target_value, int usleep_min,
  86                                     int usleep_max, int count)
  87 {
  88         u32 data;
  89
  90         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
  91                                   target_value == ((data & bit_mask) ? 1 : 0),
  92                                   usleep_max, usleep_min * count);
  93 }
  94
  95 static int lan743x_csr_init(struct lan743x_adapter *adapter)
  96 {
  97         struct lan743x_csr *csr = &adapter->csr;
  98         resource_size_t bar_start, bar_length;
  99         int result;
 100
 101         bar_start = pci_resource_start(adapter->pdev, 0);
 102         bar_length = pci_resource_len(adapter->pdev, 0);
 103         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 104                                         bar_start, bar_length);
 105         if (!csr->csr_address) {
 106                 result = -ENOMEM;
 107                 goto clean_up;
 108         }
 109
 110         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 111         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 112         netif_info(adapter, probe, adapter->netdev,
 113                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 114                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 115                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 116         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 117                 result = -ENODEV;
 118                 goto clean_up;
 119         }
 120
 121         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 122         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 123         case ID_REV_CHIP_REV_A0_:
 124                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 125                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 126                 break;
 127         case ID_REV_CHIP_REV_B0_:
 128                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 129                 break;
 130         }
 131
 132         result = lan743x_csr_light_reset(adapter);
 133         if (result)
 134                 goto clean_up;
 135         return 0;
 136 clean_up:
 137         return result;
 138 }
 139
 140 static void lan743x_intr_software_isr(void *context)
 141 {
 142         struct lan743x_adapter *adapter = context;
 143         struct lan743x_intr *intr = &adapter->intr;
 144         u32 int_sts;
 145
 146         int_sts = lan743x_csr_read(adapter, INT_STS);
 147         if (int_sts & INT_BIT_SW_GP_) {
 148                 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
 149                 intr->software_isr_flag = 1;
 150         }
 151 }
 152
 153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 154 {
 155         struct lan743x_tx *tx = context;
 156         struct lan743x_adapter *adapter = tx->adapter;
 157         bool enable_flag = true;
 158         u32 int_en = 0;
 159
 160         int_en = lan743x_csr_read(adapter, INT_EN_SET);
 161         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 162                 lan743x_csr_write(adapter, INT_EN_CLR,
 163                                   INT_BIT_DMA_TX_(tx->channel_number));
 164         }
 165
 166         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 167                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 168                 u32 dmac_int_sts;
 169                 u32 dmac_int_en;
 170
 171                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 172                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 173                 else
 174                         dmac_int_sts = ioc_bit;
 175                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 176                         dmac_int_en = lan743x_csr_read(adapter,
 177                                                        DMAC_INT_EN_SET);
 178                 else
 179                         dmac_int_en = ioc_bit;
 180
 181                 dmac_int_en &= ioc_bit;
 182                 dmac_int_sts &= dmac_int_en;
 183                 if (dmac_int_sts & ioc_bit) {
 184                         napi_schedule(&tx->napi);
 185                         enable_flag = false;/* poll func will enable later */
 186                 }
 187         }
 188
 189         if (enable_flag)
 190                 /* enable isr */
 191                 lan743x_csr_write(adapter, INT_EN_SET,
 192                                   INT_BIT_DMA_TX_(tx->channel_number));
 193 }
 194
 195 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 196 {
 197         struct lan743x_rx *rx = context;
 198         struct lan743x_adapter *adapter = rx->adapter;
 199         bool enable_flag = true;
 200
 201         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 202                 lan743x_csr_write(adapter, INT_EN_CLR,
 203                                   INT_BIT_DMA_RX_(rx->channel_number));
 204         }
 205
 206         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 207                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 208                 u32 dmac_int_sts;
 209                 u32 dmac_int_en;
 210
 211                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 212                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 213                 else
 214                         dmac_int_sts = rx_frame_bit;
 215                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 216                         dmac_int_en = lan743x_csr_read(adapter,
 217                                                        DMAC_INT_EN_SET);
 218                 else
 219                         dmac_int_en = rx_frame_bit;
 220
 221                 dmac_int_en &= rx_frame_bit;
 222                 dmac_int_sts &= dmac_int_en;
 223                 if (dmac_int_sts & rx_frame_bit) {
 224                         napi_schedule(&rx->napi);
 225                         enable_flag = false;/* poll funct will enable later */
 226                 }
 227         }
 228
 229         if (enable_flag) {
 230                 /* enable isr */
 231                 lan743x_csr_write(adapter, INT_EN_SET,
 232                                   INT_BIT_DMA_RX_(rx->channel_number));
 233         }
 234 }
 235
 236 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 237 {
 238         struct lan743x_adapter *adapter = context;
 239         unsigned int channel;
 240
 241         if (int_sts & INT_BIT_ALL_RX_) {
 242                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 243                         channel++) {
 244                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 245
 246                         if (int_sts & int_bit) {
 247                                 lan743x_rx_isr(&adapter->rx[channel],
 248                                                int_bit, flags);
 249                                 int_sts &= ~int_bit;
 250                         }
 251                 }
 252         }
 253         if (int_sts & INT_BIT_ALL_TX_) {
 254                 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
 255                         channel++) {
 256                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 257
 258                         if (int_sts & int_bit) {
 259                                 lan743x_tx_isr(&adapter->tx[channel],
 260                                                int_bit, flags);
 261                                 int_sts &= ~int_bit;
 262                         }
 263                 }
 264         }
 265         if (int_sts & INT_BIT_ALL_OTHER_) {
 266                 if (int_sts & INT_BIT_SW_GP_) {
 267                         lan743x_intr_software_isr(adapter);
 268                         int_sts &= ~INT_BIT_SW_GP_;
 269                 }
 270                 if (int_sts & INT_BIT_1588_) {
 271                         lan743x_ptp_isr(adapter);
 272                         int_sts &= ~INT_BIT_1588_;
 273                 }
 274         }
 275         if (int_sts)
 276                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 277 }
 278
 279 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 280 {
 281         struct lan743x_vector *vector = ptr;
 282         struct lan743x_adapter *adapter = vector->adapter;
 283         irqreturn_t result = IRQ_NONE;
 284         u32 int_enables;
 285         u32 int_sts;
 286
 287         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 288                 int_sts = lan743x_csr_read(adapter, INT_STS);
 289         } else if (vector->flags &
 290                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 291                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 292                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 293         } else {
 294                 /* use mask as implied status */
 295                 int_sts = vector->int_mask | INT_BIT_MAS_;
 296         }
 297
 298         if (!(int_sts & INT_BIT_MAS_))
 299                 goto irq_done;
 300
 301         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 302                 /* disable vector interrupt */
 303                 lan743x_csr_write(adapter,
 304                                   INT_VEC_EN_CLR,
 305                                   INT_VEC_EN_(vector->vector_index));
 306
 307         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 308                 /* disable master interrupt */
 309                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 310
 311         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 312                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 313         } else {
 314                 /*  use vector mask as implied enable mask */
 315                 int_enables = vector->int_mask;
 316         }
 317
 318         int_sts &= int_enables;
 319         int_sts &= vector->int_mask;
 320         if (int_sts) {
 321                 if (vector->handler) {
 322                         vector->handler(vector->context,
 323                                         int_sts, vector->flags);
 324                 } else {
 325                         /* disable interrupts on this vector */
 326                         lan743x_csr_write(adapter, INT_EN_CLR,
 327                                           vector->int_mask);
 328                 }
 329                 result = IRQ_HANDLED;
 330         }
 331
 332         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 333                 /* enable master interrupt */
 334                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 335
 336         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 337                 /* enable vector interrupt */
 338                 lan743x_csr_write(adapter,
 339                                   INT_VEC_EN_SET,
 340                                   INT_VEC_EN_(vector->vector_index));
 341 irq_done:
 342         return result;
 343 }
 344
 345 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 346 {
 347         struct lan743x_intr *intr = &adapter->intr;
 348         int result = -ENODEV;
 349         int timeout = 10;
 350
 351         intr->software_isr_flag = 0;
 352
 353         /* enable interrupt */
 354         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 355
 356         /* activate interrupt here */
 357         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 358         while ((timeout > 0) && (!(intr->software_isr_flag))) {
 359                 usleep_range(1000, 20000);
 360                 timeout--;
 361         }
 362
 363         if (intr->software_isr_flag)
 364                 result = 0;
 365
 366         /* disable interrupts */
 367         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 368         return result;
 369 }
 370
 371 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 372                                      int vector_index, u32 flags,
 373                                      u32 int_mask,
 374                                      lan743x_vector_handler handler,
 375                                      void *context)
 376 {
 377         struct lan743x_vector *vector = &adapter->intr.vector_list
 378                                         [vector_index];
 379         int ret;
 380
 381         vector->adapter = adapter;
 382         vector->flags = flags;
 383         vector->vector_index = vector_index;
 384         vector->int_mask = int_mask;
 385         vector->handler = handler;
 386         vector->context = context;
 387
 388         ret = request_irq(vector->irq,
 389                           lan743x_intr_entry_isr,
 390                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 391                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 392         if (ret) {
 393                 vector->handler = NULL;
 394                 vector->context = NULL;
 395                 vector->int_mask = 0;
 396                 vector->flags = 0;
 397         }
 398         return ret;
 399 }
 400
 401 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 402                                         int vector_index)
 403 {
 404         struct lan743x_vector *vector = &adapter->intr.vector_list
 405                                         [vector_index];
 406
 407         free_irq(vector->irq, vector);
 408         vector->handler = NULL;
 409         vector->context = NULL;
 410         vector->int_mask = 0;
 411         vector->flags = 0;
 412 }
 413
 414 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 415                                          u32 int_mask)
 416 {
 417         int index;
 418
 419         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 420                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 421                         return adapter->intr.vector_list[index].flags;
 422         }
 423         return 0;
 424 }
 425
 426 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 427 {
 428         struct lan743x_intr *intr = &adapter->intr;
 429         int index = 0;
 430
 431         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 432         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 433
 434         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 435                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 436                         lan743x_intr_unregister_isr(adapter, index);
 437                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 438                 }
 439         }
 440
 441         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 442                 pci_disable_msi(adapter->pdev);
 443                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 444         }
 445
 446         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 447                 pci_disable_msix(adapter->pdev);
 448                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 449         }
 450 }
 451
 452 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 453 {
 454         struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
 455         struct lan743x_intr *intr = &adapter->intr;
 456         u32 int_vec_en_auto_clr = 0;
 457         u32 int_vec_map0 = 0;
 458         u32 int_vec_map1 = 0;
 459         int ret = -ENODEV;
 460         int index = 0;
 461         u32 flags = 0;
 462
 463         intr->number_of_vectors = 0;
 464
 465         /* Try to set up MSIX interrupts */
 466         memset(&msix_entries[0], 0,
 467                sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
 468         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
 469                 msix_entries[index].entry = index;
 470         ret = pci_enable_msix_range(adapter->pdev,
 471                                     msix_entries, 1,
 472                                     1 + LAN743X_USED_TX_CHANNELS +
 473                                     LAN743X_USED_RX_CHANNELS);
 474
 475         if (ret > 0) {
 476                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 477                 intr->number_of_vectors = ret;
 478                 intr->using_vectors = true;
 479                 for (index = 0; index < intr->number_of_vectors; index++)
 480                         intr->vector_list[index].irq = msix_entries
 481                                                        [index].vector;
 482                 netif_info(adapter, ifup, adapter->netdev,
 483                            "using MSIX interrupts, number of vectors = %d\n",
 484                            intr->number_of_vectors);
 485         }
 486
 487         /* If MSIX failed try to setup using MSI interrupts */
 488         if (!intr->number_of_vectors) {
 489                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 490                         if (!pci_enable_msi(adapter->pdev)) {
 491                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 492                                 intr->number_of_vectors = 1;
 493                                 intr->using_vectors = true;
 494                                 intr->vector_list[0].irq =
 495                                         adapter->pdev->irq;
 496                                 netif_info(adapter, ifup, adapter->netdev,
 497                                            "using MSI interrupts, number of vectors = %d\n",
 498                                            intr->number_of_vectors);
 499                         }
 500                 }
 501         }
 502
 503         /* If MSIX, and MSI failed, setup using legacy interrupt */
 504         if (!intr->number_of_vectors) {
 505                 intr->number_of_vectors = 1;
 506                 intr->using_vectors = false;
 507                 intr->vector_list[0].irq = intr->irq;
 508                 netif_info(adapter, ifup, adapter->netdev,
 509                            "using legacy interrupts\n");
 510         }
 511
 512         /* At this point we must have at least one irq */
 513         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 514
 515         /* map all interrupts to vector 0 */
 516         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 517         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 518         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 519         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 520                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 521                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 522                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 523
 524         if (intr->using_vectors) {
 525                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 526                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 527         } else {
 528                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 529                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 530                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 531         }
 532
 533         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 534                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 535                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 536                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 537                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 538                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 539                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 540         }
 541
 542         ret = lan743x_intr_register_isr(adapter, 0, flags,
 543                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 544                                         INT_BIT_ALL_OTHER_,
 545                                         lan743x_intr_shared_isr, adapter);
 546         if (ret)
 547                 goto clean_up;
 548         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 549
 550         if (intr->using_vectors)
 551                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 552                                   INT_VEC_EN_(0));
 553
 554         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 555                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 556                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 557                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 558                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 559                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 560                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 561                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 562                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 563                 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 564                 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 565                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 566         }
 567
 568         /* enable interrupts */
 569         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 570         ret = lan743x_intr_test_isr(adapter);
 571         if (ret)
 572                 goto clean_up;
 573
 574         if (intr->number_of_vectors > 1) {
 575                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 576
 577                 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
 578                         number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
 579                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 580                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 581                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 582                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 583                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 584                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 585
 586                 if (adapter->csr.flags &
 587                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 588                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 589                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 590                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 591                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 592                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 593                 }
 594
 595                 for (index = 0; index < number_of_tx_vectors; index++) {
 596                         u32 int_bit = INT_BIT_DMA_TX_(index);
 597                         int vector = index + 1;
 598
 599                         /* map TX interrupt to vector */
 600                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 601                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 602                         if (flags &
 603                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 604                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 605                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 606                                                   int_vec_en_auto_clr);
 607                         }
 608
 609                         /* Remove TX interrupt from shared mask */
 610                         intr->vector_list[0].int_mask &= ~int_bit;
 611                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 612                                                         int_bit, lan743x_tx_isr,
 613                                                         &adapter->tx[index]);
 614                         if (ret)
 615                                 goto clean_up;
 616                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 617                         if (!(flags &
 618                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 619                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 620                                                   INT_VEC_EN_(vector));
 621                 }
 622         }
 623         if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
 624                 int number_of_rx_vectors = intr->number_of_vectors -
 625                                            LAN743X_USED_TX_CHANNELS - 1;
 626
 627                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 628                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 629
 630                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 631                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 632                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 633                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 634                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 635                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 636
 637                 if (adapter->csr.flags &
 638                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 639                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 640                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 641                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 642                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 643                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 644                 }
 645                 for (index = 0; index < number_of_rx_vectors; index++) {
 646                         int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
 647                         u32 int_bit = INT_BIT_DMA_RX_(index);
 648
 649                         /* map RX interrupt to vector */
 650                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 651                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 652                         if (flags &
 653                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 654                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 655                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 656                                                   int_vec_en_auto_clr);
 657                         }
 658
 659                         /* Remove RX interrupt from shared mask */
 660                         intr->vector_list[0].int_mask &= ~int_bit;
 661                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 662                                                         int_bit, lan743x_rx_isr,
 663                                                         &adapter->rx[index]);
 664                         if (ret)
 665                                 goto clean_up;
 666                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 667
 668                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 669                                           INT_VEC_EN_(vector));
 670                 }
 671         }
 672         return 0;
 673
 674 clean_up:
 675         lan743x_intr_close(adapter);
 676         return ret;
 677 }
 678
 679 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 680                             u32 select, u32 addr, u32 length, u32 *buf)
 681 {
 682         int ret = -EIO;
 683         u32 dp_sel;
 684         int i;
 685
 686         mutex_lock(&adapter->dp_lock);
 687         if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 688                                      1, 40, 100, 100))
 689                 goto unlock;
 690         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 691         dp_sel &= ~DP_SEL_MASK_;
 692         dp_sel |= select;
 693         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 694
 695         for (i = 0; i < length; i++) {
 696                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 697                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 698                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 699                 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 700                                              1, 40, 100, 100))
 701                         goto unlock;
 702         }
 703         ret = 0;
 704
 705 unlock:
 706         mutex_unlock(&adapter->dp_lock);
 707         return ret;
 708 }
 709
 710 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 711 {
 712         u32 ret;
 713
 714         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 715                 MAC_MII_ACC_PHY_ADDR_MASK_;
 716         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 717                 MAC_MII_ACC_MIIRINDA_MASK_;
 718
 719         if (read)
 720                 ret |= MAC_MII_ACC_MII_READ_;
 721         else
 722                 ret |= MAC_MII_ACC_MII_WRITE_;
 723         ret |= MAC_MII_ACC_MII_BUSY_;
 724
 725         return ret;
 726 }
 727
 728 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 729 {
 730         u32 data;
 731
 732         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 733                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 734 }
 735
 736 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 737 {
 738         struct lan743x_adapter *adapter = bus->priv;
 739         u32 val, mii_access;
 740         int ret;
 741
 742         /* comfirm MII not busy */
 743         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 744         if (ret < 0)
 745                 return ret;
 746
 747         /* set the address, index & direction (read from PHY) */
 748         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 749         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 750         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 751         if (ret < 0)
 752                 return ret;
 753
 754         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 755         return (int)(val & 0xFFFF);
 756 }
 757
 758 static int lan743x_mdiobus_write(struct mii_bus *bus,
 759                                  int phy_id, int index, u16 regval)
 760 {
 761         struct lan743x_adapter *adapter = bus->priv;
 762         u32 val, mii_access;
 763         int ret;
 764
 765         /* confirm MII not busy */
 766         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 767         if (ret < 0)
 768                 return ret;
 769         val = (u32)regval;
 770         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 771
 772         /* set the address, index & direction (write to PHY) */
 773         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 774         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 775         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 776         return ret;
 777 }
 778
 779 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 780                                     u8 *addr)
 781 {
 782         u32 addr_lo, addr_hi;
 783
 784         addr_lo = addr[0] |
 785                 addr[1] << 8 |
 786                 addr[2] << 16 |
 787                 addr[3] << 24;
 788         addr_hi = addr[4] |
 789                 addr[5] << 8;
 790         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 791         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 792
 793         ether_addr_copy(adapter->mac_address, addr);
 794         netif_info(adapter, drv, adapter->netdev,
 795                    "MAC address set to %pM\n", addr);
 796 }
 797
 798 static int lan743x_mac_init(struct lan743x_adapter *adapter)
 799 {
 800         bool mac_address_valid = true;
 801         struct net_device *netdev;
 802         u32 mac_addr_hi = 0;
 803         u32 mac_addr_lo = 0;
 804         u32 data;
 805
 806         netdev = adapter->netdev;
 807
 808         /* setup auto duplex, and speed detection */
 809         data = lan743x_csr_read(adapter, MAC_CR);
 810         data |= MAC_CR_ADD_ | MAC_CR_ASD_;
 811         data |= MAC_CR_CNTR_RST_;
 812         lan743x_csr_write(adapter, MAC_CR, data);
 813
 814         mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 815         mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 816         adapter->mac_address[0] = mac_addr_lo & 0xFF;
 817         adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 818         adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 819         adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 820         adapter->mac_address[4] = mac_addr_hi & 0xFF;
 821         adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 822
 823         if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 824             mac_addr_lo == 0xFFFFFFFF) {
 825                 mac_address_valid = false;
 826         } else if (!is_valid_ether_addr(adapter->mac_address)) {
 827                 mac_address_valid = false;
 828         }
 829
 830         if (!mac_address_valid)
 831                 eth_random_addr(adapter->mac_address);
 832         lan743x_mac_set_address(adapter, adapter->mac_address);
 833         ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 834         return 0;
 835 }
 836
 837 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 838 {
 839         int ret = 0;
 840         u32 temp;
 841
 842         temp = lan743x_csr_read(adapter, MAC_RX);
 843         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 844         temp = lan743x_csr_read(adapter, MAC_TX);
 845         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 846         return ret;
 847 }
 848
 849 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 850 {
 851         u32 temp;
 852
 853         temp = lan743x_csr_read(adapter, MAC_TX);
 854         temp &= ~MAC_TX_TXEN_;
 855         lan743x_csr_write(adapter, MAC_TX, temp);
 856         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 857                                  1, 1000, 20000, 100);
 858
 859         temp = lan743x_csr_read(adapter, MAC_RX);
 860         temp &= ~MAC_RX_RXEN_;
 861         lan743x_csr_write(adapter, MAC_RX, temp);
 862         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 863                                  1, 1000, 20000, 100);
 864 }
 865
 866 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 867                                               bool tx_enable, bool rx_enable)
 868 {
 869         u32 flow_setting = 0;
 870
 871         /* set maximum pause time because when fifo space frees
 872          * up a zero value pause frame will be sent to release the pause
 873          */
 874         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 875         if (tx_enable)
 876                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 877         if (rx_enable)
 878                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 879         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 880 }
 881
 882 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 883 {
 884         int enabled = 0;
 885         u32 mac_rx = 0;
 886
 887         mac_rx = lan743x_csr_read(adapter, MAC_RX);
 888         if (mac_rx & MAC_RX_RXEN_) {
 889                 enabled = 1;
 890                 if (mac_rx & MAC_RX_RXD_) {
 891                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 892                         mac_rx &= ~MAC_RX_RXD_;
 893                 }
 894                 mac_rx &= ~MAC_RX_RXEN_;
 895                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 896                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 897                                          1, 1000, 20000, 100);
 898                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 899         }
 900
 901         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 902         mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
 903                   MAC_RX_MAX_SIZE_MASK_);
 904         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 905
 906         if (enabled) {
 907                 mac_rx |= MAC_RX_RXEN_;
 908                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 909         }
 910         return 0;
 911 }
 912
 913 /* PHY */
 914 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 915 {
 916         u32 data;
 917
 918         /* Only called with in probe, and before mdiobus_register */
 919
 920         data = lan743x_csr_read(adapter, PMT_CTL);
 921         data |= PMT_CTL_ETH_PHY_RST_;
 922         lan743x_csr_write(adapter, PMT_CTL, data);
 923
 924         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 925                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
 926                                   (data & PMT_CTL_READY_)),
 927                                   50000, 1000000);
 928 }
 929
 930 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 931                                            u8 duplex, u16 local_adv,
 932                                            u16 remote_adv)
 933 {
 934         struct lan743x_phy *phy = &adapter->phy;
 935         u8 cap;
 936
 937         if (phy->fc_autoneg)
 938                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 939         else
 940                 cap = phy->fc_request_control;
 941
 942         lan743x_mac_flow_ctrl_set_enables(adapter,
 943                                           cap & FLOW_CTRL_TX,
 944                                           cap & FLOW_CTRL_RX);
 945 }
 946
 947 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 948 {
 949         return lan743x_phy_reset(adapter);
 950 }
 951
 952 static void lan743x_phy_link_status_change(struct net_device *netdev)
 953 {
 954         struct lan743x_adapter *adapter = netdev_priv(netdev);
 955         struct phy_device *phydev = netdev->phydev;
 956
 957         phy_print_status(phydev);
 958         if (phydev->state == PHY_RUNNING) {
 959                 struct ethtool_link_ksettings ksettings;
 960                 int remote_advertisement = 0;
 961                 int local_advertisement = 0;
 962
 963                 memset(&ksettings, 0, sizeof(ksettings));
 964                 phy_ethtool_get_link_ksettings(netdev, &ksettings);
 965                 local_advertisement = phy_read(phydev, MII_ADVERTISE);
 966                 if (local_advertisement < 0)
 967                         return;
 968
 969                 remote_advertisement = phy_read(phydev, MII_LPA);
 970                 if (remote_advertisement < 0)
 971                         return;
 972
 973                 lan743x_phy_update_flowcontrol(adapter,
 974                                                ksettings.base.duplex,
 975                                                local_advertisement,
 976                                                remote_advertisement);
 977                 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
 978         }
 979 }
 980
 981 static void lan743x_phy_close(struct lan743x_adapter *adapter)
 982 {
 983         struct net_device *netdev = adapter->netdev;
 984
 985         phy_stop(netdev->phydev);
 986         phy_disconnect(netdev->phydev);
 987         netdev->phydev = NULL;
 988 }
 989
 990 static int lan743x_phy_open(struct lan743x_adapter *adapter)
 991 {
 992         struct lan743x_phy *phy = &adapter->phy;
 993         struct phy_device *phydev;
 994         struct net_device *netdev;
 995         int ret = -EIO;
 996
 997         netdev = adapter->netdev;
 998         phydev = phy_find_first(adapter->mdiobus);
 999         if (!phydev)
1000                 goto return_error;
1001
1002         ret = phy_connect_direct(netdev, phydev,
1003                                  lan743x_phy_link_status_change,
1004                                  PHY_INTERFACE_MODE_GMII);
1005         if (ret)
1006                 goto return_error;
1007
1008         /* MAC doesn't support 1000T Half */
1009         phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1010
1011         /* support both flow controls */
1012         phy_support_asym_pause(phydev);
1013         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1014         phy->fc_autoneg = phydev->autoneg;
1015
1016         phy_start(phydev);
1017         phy_start_aneg(phydev);
1018         return 0;
1019
1020 return_error:
1021         return ret;
1022 }
1023
1024 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1025 {
1026         lan743x_csr_write(adapter, RFE_RSS_CFG,
1027                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1028                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1029                 RFE_RSS_CFG_IPV6_EX_ |
1030                 RFE_RSS_CFG_UDP_IPV6_ |
1031                 RFE_RSS_CFG_TCP_IPV6_ |
1032                 RFE_RSS_CFG_IPV6_ |
1033                 RFE_RSS_CFG_UDP_IPV4_ |
1034                 RFE_RSS_CFG_TCP_IPV4_ |
1035                 RFE_RSS_CFG_IPV4_ |
1036                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1037                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1038                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1039                 RFE_RSS_CFG_RSS_ENABLE_);
1040 }
1041
1042 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1043 {
1044         u8 *mac_addr;
1045         u32 mac_addr_hi = 0;
1046         u32 mac_addr_lo = 0;
1047
1048         /* Add mac address to perfect Filter */
1049         mac_addr = adapter->mac_address;
1050         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1051                       (((u32)(mac_addr[1])) << 8) |
1052                       (((u32)(mac_addr[2])) << 16) |
1053                       (((u32)(mac_addr[3])) << 24));
1054         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1055                       (((u32)(mac_addr[5])) << 8));
1056
1057         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1058         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1059                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1060 }
1061
1062 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1063 {
1064         struct net_device *netdev = adapter->netdev;
1065         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1066         u32 rfctl;
1067         u32 data;
1068
1069         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1070         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1071                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1072         rfctl |= RFE_CTL_AB_;
1073         if (netdev->flags & IFF_PROMISC) {
1074                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1075         } else {
1076                 if (netdev->flags & IFF_ALLMULTI)
1077                         rfctl |= RFE_CTL_AM_;
1078         }
1079
1080         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1081         if (netdev_mc_count(netdev)) {
1082                 struct netdev_hw_addr *ha;
1083                 int i;
1084
1085                 rfctl |= RFE_CTL_DA_PERFECT_;
1086                 i = 1;
1087                 netdev_for_each_mc_addr(ha, netdev) {
1088                         /* set first 32 into Perfect Filter */
1089                         if (i < 33) {
1090                                 lan743x_csr_write(adapter,
1091                                                   RFE_ADDR_FILT_HI(i), 0);
1092                                 data = ha->addr[3];
1093                                 data = ha->addr[2] | (data << 8);
1094                                 data = ha->addr[1] | (data << 8);
1095                                 data = ha->addr[0] | (data << 8);
1096                                 lan743x_csr_write(adapter,
1097                                                   RFE_ADDR_FILT_LO(i), data);
1098                                 data = ha->addr[5];
1099                                 data = ha->addr[4] | (data << 8);
1100                                 data |= RFE_ADDR_FILT_HI_VALID_;
1101                                 lan743x_csr_write(adapter,
1102                                                   RFE_ADDR_FILT_HI(i), data);
1103                         } else {
1104                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1105                                              23) & 0x1FF;
1106                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1107                                 rfctl |= RFE_CTL_MCAST_HASH_;
1108                         }
1109                         i++;
1110                 }
1111         }
1112
1113         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1114                          DP_SEL_VHF_VLAN_LEN,
1115                          DP_SEL_VHF_HASH_LEN, hash_table);
1116         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1117 }
1118
1119 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1120 {
1121         u32 data = 0;
1122
1123         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1124         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1125                                  0, 1000, 20000, 100);
1126         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1127         case DMA_DESCRIPTOR_SPACING_16:
1128                 data = DMAC_CFG_MAX_DSPACE_16_;
1129                 break;
1130         case DMA_DESCRIPTOR_SPACING_32:
1131                 data = DMAC_CFG_MAX_DSPACE_32_;
1132                 break;
1133         case DMA_DESCRIPTOR_SPACING_64:
1134                 data = DMAC_CFG_MAX_DSPACE_64_;
1135                 break;
1136         case DMA_DESCRIPTOR_SPACING_128:
1137                 data = DMAC_CFG_MAX_DSPACE_128_;
1138                 break;
1139         default:
1140                 return -EPERM;
1141         }
1142         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1143                 data |= DMAC_CFG_COAL_EN_;
1144         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1145         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1146         lan743x_csr_write(adapter, DMAC_CFG, data);
1147         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1148         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1149         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1150         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1151         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1152         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1153         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1154         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1155         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1156         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1157         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1158         return 0;
1159 }
1160
1161 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1162                                      int tx_channel)
1163 {
1164         u32 dmac_cmd = 0;
1165
1166         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1167         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1168                                       DMAC_CMD_START_T_(tx_channel)),
1169                                       (dmac_cmd &
1170                                       DMAC_CMD_STOP_T_(tx_channel)));
1171 }
1172
1173 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1174                                              int tx_channel)
1175 {
1176         int timeout = 100;
1177         int result = 0;
1178
1179         while (timeout &&
1180                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1181                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1182                 usleep_range(1000, 20000);
1183                 timeout--;
1184         }
1185         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1186                 result = -ENODEV;
1187         return result;
1188 }
1189
1190 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1191                                      int rx_channel)
1192 {
1193         u32 dmac_cmd = 0;
1194
1195         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1196         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1197                                       DMAC_CMD_START_R_(rx_channel)),
1198                                       (dmac_cmd &
1199                                       DMAC_CMD_STOP_R_(rx_channel)));
1200 }
1201
1202 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1203                                              int rx_channel)
1204 {
1205         int timeout = 100;
1206         int result = 0;
1207
1208         while (timeout &&
1209                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1210                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1211                 usleep_range(1000, 20000);
1212                 timeout--;
1213         }
1214         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1215                 result = -ENODEV;
1216         return result;
1217 }
1218
1219 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1220                                     int descriptor_index, bool cleanup)
1221 {
1222         struct lan743x_tx_buffer_info *buffer_info = NULL;
1223         struct lan743x_tx_descriptor *descriptor = NULL;
1224         u32 descriptor_type = 0;
1225         bool ignore_sync;
1226
1227         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1228         buffer_info = &tx->buffer_info[descriptor_index];
1229         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1230                 goto done;
1231
1232         descriptor_type = (descriptor->data0) &
1233                           TX_DESC_DATA0_DTYPE_MASK_;
1234         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1235                 goto clean_up_data_descriptor;
1236         else
1237                 goto clear_active;
1238
1239 clean_up_data_descriptor:
1240         if (buffer_info->dma_ptr) {
1241                 if (buffer_info->flags &
1242                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1243                         dma_unmap_page(&tx->adapter->pdev->dev,
1244                                        buffer_info->dma_ptr,
1245                                        buffer_info->buffer_length,
1246                                        DMA_TO_DEVICE);
1247                 } else {
1248                         dma_unmap_single(&tx->adapter->pdev->dev,
1249                                          buffer_info->dma_ptr,
1250                                          buffer_info->buffer_length,
1251                                          DMA_TO_DEVICE);
1252                 }
1253                 buffer_info->dma_ptr = 0;
1254                 buffer_info->buffer_length = 0;
1255         }
1256         if (!buffer_info->skb)
1257                 goto clear_active;
1258
1259         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1260                 dev_kfree_skb(buffer_info->skb);
1261                 goto clear_skb;
1262         }
1263
1264         if (cleanup) {
1265                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1266                 dev_kfree_skb(buffer_info->skb);
1267         } else {
1268                 ignore_sync = (buffer_info->flags &
1269                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1270                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1271                                              buffer_info->skb, ignore_sync);
1272         }
1273
1274 clear_skb:
1275         buffer_info->skb = NULL;
1276
1277 clear_active:
1278         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1279
1280 done:
1281         memset(buffer_info, 0, sizeof(*buffer_info));
1282         memset(descriptor, 0, sizeof(*descriptor));
1283 }
1284
1285 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1286 {
1287         return ((++index) % tx->ring_size);
1288 }
1289
1290 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1291 {
1292         while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1293                 lan743x_tx_release_desc(tx, tx->last_head, false);
1294                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1295         }
1296 }
1297
1298 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1299 {
1300         u32 original_head = 0;
1301
1302         original_head = tx->last_head;
1303         do {
1304                 lan743x_tx_release_desc(tx, tx->last_head, true);
1305                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1306         } while (tx->last_head != original_head);
1307         memset(tx->ring_cpu_ptr, 0,
1308                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1309         memset(tx->buffer_info, 0,
1310                sizeof(*tx->buffer_info) * (tx->ring_size));
1311 }
1312
1313 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1314                                    struct sk_buff *skb)
1315 {
1316         int result = 1; /* 1 for the main skb buffer */
1317         int nr_frags = 0;
1318
1319         if (skb_is_gso(skb))
1320                 result++; /* requires an extension descriptor */
1321         nr_frags = skb_shinfo(skb)->nr_frags;
1322         result += nr_frags; /* 1 for each fragment buffer */
1323         return result;
1324 }
1325
1326 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1327 {
1328         int last_head = tx->last_head;
1329         int last_tail = tx->last_tail;
1330
1331         if (last_tail >= last_head)
1332                 return tx->ring_size - last_tail + last_head - 1;
1333         else
1334                 return last_head - last_tail - 1;
1335 }
1336
1337 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1338                                       bool enable_timestamping,
1339                                       bool enable_onestep_sync)
1340 {
1341         if (enable_timestamping)
1342                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1343         else
1344                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1345         if (enable_onestep_sync)
1346                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1347         else
1348                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1349 }
1350
1351 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1352                                   unsigned char *first_buffer,
1353                                   unsigned int first_buffer_length,
1354                                   unsigned int frame_length,
1355                                   bool time_stamp,
1356                                   bool check_sum)
1357 {
1358         /* called only from within lan743x_tx_xmit_frame.
1359          * assuming tx->ring_lock has already been acquired.
1360          */
1361         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1362         struct lan743x_tx_buffer_info *buffer_info = NULL;
1363         struct lan743x_adapter *adapter = tx->adapter;
1364         struct device *dev = &adapter->pdev->dev;
1365         dma_addr_t dma_ptr;
1366
1367         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1368         tx->frame_first = tx->last_tail;
1369         tx->frame_tail = tx->frame_first;
1370
1371         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1372         buffer_info = &tx->buffer_info[tx->frame_tail];
1373         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1374                                  DMA_TO_DEVICE);
1375         if (dma_mapping_error(dev, dma_ptr))
1376                 return -ENOMEM;
1377
1378         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1379         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1380         tx_descriptor->data3 = (frame_length << 16) &
1381                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1382
1383         buffer_info->skb = NULL;
1384         buffer_info->dma_ptr = dma_ptr;
1385         buffer_info->buffer_length = first_buffer_length;
1386         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1387
1388         tx->frame_data0 = (first_buffer_length &
1389                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1390                 TX_DESC_DATA0_DTYPE_DATA_ |
1391                 TX_DESC_DATA0_FS_ |
1392                 TX_DESC_DATA0_FCS_;
1393         if (time_stamp)
1394                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1395
1396         if (check_sum)
1397                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1398                                    TX_DESC_DATA0_IPE_ |
1399                                    TX_DESC_DATA0_TPE_;
1400
1401         /* data0 will be programmed in one of other frame assembler functions */
1402         return 0;
1403 }
1404
1405 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1406                                      unsigned int frame_length)
1407 {
1408         /* called only from within lan743x_tx_xmit_frame.
1409          * assuming tx->ring_lock has already been acquired.
1410          */
1411         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1412         struct lan743x_tx_buffer_info *buffer_info = NULL;
1413
1414         /* wrap up previous descriptor */
1415         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1416         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1417         tx_descriptor->data0 = tx->frame_data0;
1418
1419         /* move to next descriptor */
1420         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1421         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1422         buffer_info = &tx->buffer_info[tx->frame_tail];
1423
1424         /* add extension descriptor */
1425         tx_descriptor->data1 = 0;
1426         tx_descriptor->data2 = 0;
1427         tx_descriptor->data3 = 0;
1428
1429         buffer_info->skb = NULL;
1430         buffer_info->dma_ptr = 0;
1431         buffer_info->buffer_length = 0;
1432         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1433
1434         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1435                           TX_DESC_DATA0_DTYPE_EXT_ |
1436                           TX_DESC_DATA0_EXT_LSO_;
1437
1438         /* data0 will be programmed in one of other frame assembler functions */
1439 }
1440
1441 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1442                                          const struct skb_frag_struct *fragment,
1443                                          unsigned int frame_length)
1444 {
1445         /* called only from within lan743x_tx_xmit_frame
1446          * assuming tx->ring_lock has already been acquired
1447          */
1448         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1449         struct lan743x_tx_buffer_info *buffer_info = NULL;
1450         struct lan743x_adapter *adapter = tx->adapter;
1451         struct device *dev = &adapter->pdev->dev;
1452         unsigned int fragment_length = 0;
1453         dma_addr_t dma_ptr;
1454
1455         fragment_length = skb_frag_size(fragment);
1456         if (!fragment_length)
1457                 return 0;
1458
1459         /* wrap up previous descriptor */
1460         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1461         tx_descriptor->data0 = tx->frame_data0;
1462
1463         /* move to next descriptor */
1464         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1465         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1466         buffer_info = &tx->buffer_info[tx->frame_tail];
1467         dma_ptr = skb_frag_dma_map(dev, fragment,
1468                                    0, fragment_length,
1469                                    DMA_TO_DEVICE);
1470         if (dma_mapping_error(dev, dma_ptr)) {
1471                 int desc_index;
1472
1473                 /* cleanup all previously setup descriptors */
1474                 desc_index = tx->frame_first;
1475                 while (desc_index != tx->frame_tail) {
1476                         lan743x_tx_release_desc(tx, desc_index, true);
1477                         desc_index = lan743x_tx_next_index(tx, desc_index);
1478                 }
1479                 dma_wmb();
1480                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1481                 tx->frame_first = 0;
1482                 tx->frame_data0 = 0;
1483                 tx->frame_tail = 0;
1484                 return -ENOMEM;
1485         }
1486
1487         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1488         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1489         tx_descriptor->data3 = (frame_length << 16) &
1490                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1491
1492         buffer_info->skb = NULL;
1493         buffer_info->dma_ptr = dma_ptr;
1494         buffer_info->buffer_length = fragment_length;
1495         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1496         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1497
1498         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1499                           TX_DESC_DATA0_DTYPE_DATA_ |
1500                           TX_DESC_DATA0_FCS_;
1501
1502         /* data0 will be programmed in one of other frame assembler functions */
1503         return 0;
1504 }
1505
1506 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1507                                  struct sk_buff *skb,
1508                                  bool time_stamp,
1509                                  bool ignore_sync)
1510 {
1511         /* called only from within lan743x_tx_xmit_frame
1512          * assuming tx->ring_lock has already been acquired
1513          */
1514         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1515         struct lan743x_tx_buffer_info *buffer_info = NULL;
1516         struct lan743x_adapter *adapter = tx->adapter;
1517         u32 tx_tail_flags = 0;
1518
1519         /* wrap up previous descriptor */
1520         tx->frame_data0 |= TX_DESC_DATA0_LS_;
1521         tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1522
1523         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1524         buffer_info = &tx->buffer_info[tx->frame_tail];
1525         buffer_info->skb = skb;
1526         if (time_stamp)
1527                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1528         if (ignore_sync)
1529                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1530
1531         tx_descriptor->data0 = tx->frame_data0;
1532         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1533         tx->last_tail = tx->frame_tail;
1534
1535         dma_wmb();
1536
1537         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1538                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1539         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1540                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1541                 TX_TAIL_SET_TOP_INT_EN_;
1542
1543         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1544                           tx_tail_flags | tx->frame_tail);
1545         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1546 }
1547
1548 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1549                                          struct sk_buff *skb)
1550 {
1551         int required_number_of_descriptors = 0;
1552         unsigned int start_frame_length = 0;
1553         unsigned int frame_length = 0;
1554         unsigned int head_length = 0;
1555         unsigned long irq_flags = 0;
1556         bool do_timestamp = false;
1557         bool ignore_sync = false;
1558         int nr_frags = 0;
1559         bool gso = false;
1560         int j;
1561
1562         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1563
1564         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1565         if (required_number_of_descriptors >
1566                 lan743x_tx_get_avail_desc(tx)) {
1567                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1568                         dev_kfree_skb(skb);
1569                 } else {
1570                         /* save to overflow buffer */
1571                         tx->overflow_skb = skb;
1572                         netif_stop_queue(tx->adapter->netdev);
1573                 }
1574                 goto unlock;
1575         }
1576
1577         /* space available, transmit skb  */
1578         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1579             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1580             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1581                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1582                 do_timestamp = true;
1583                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1584                         ignore_sync = true;
1585         }
1586         head_length = skb_headlen(skb);
1587         frame_length = skb_pagelen(skb);
1588         nr_frags = skb_shinfo(skb)->nr_frags;
1589         start_frame_length = frame_length;
1590         gso = skb_is_gso(skb);
1591         if (gso) {
1592                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1593                                          (unsigned short)8);
1594         }
1595
1596         if (lan743x_tx_frame_start(tx,
1597                                    skb->data, head_length,
1598                                    start_frame_length,
1599                                    do_timestamp,
1600                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1601                 dev_kfree_skb(skb);
1602                 goto unlock;
1603         }
1604
1605         if (gso)
1606                 lan743x_tx_frame_add_lso(tx, frame_length);
1607
1608         if (nr_frags <= 0)
1609                 goto finish;
1610
1611         for (j = 0; j < nr_frags; j++) {
1612                 const struct skb_frag_struct *frag;
1613
1614                 frag = &(skb_shinfo(skb)->frags[j]);
1615                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1616                         /* upon error no need to call
1617                          *      lan743x_tx_frame_end
1618                          * frame assembler clean up was performed inside
1619                          *      lan743x_tx_frame_add_fragment
1620                          */
1621                         dev_kfree_skb(skb);
1622                         goto unlock;
1623                 }
1624         }
1625
1626 finish:
1627         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1628
1629 unlock:
1630         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1631         return NETDEV_TX_OK;
1632 }
1633
1634 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1635 {
1636         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1637         struct lan743x_adapter *adapter = tx->adapter;
1638         bool start_transmitter = false;
1639         unsigned long irq_flags = 0;
1640         u32 ioc_bit = 0;
1641         u32 int_sts = 0;
1642
1643         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1644         int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1645         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1646                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1647         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1648
1649         /* clean up tx ring */
1650         lan743x_tx_release_completed_descriptors(tx);
1651         if (netif_queue_stopped(adapter->netdev)) {
1652                 if (tx->overflow_skb) {
1653                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1654                                 lan743x_tx_get_avail_desc(tx))
1655                                 start_transmitter = true;
1656                 } else {
1657                         netif_wake_queue(adapter->netdev);
1658                 }
1659         }
1660         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1661
1662         if (start_transmitter) {
1663                 /* space is now available, transmit overflow skb */
1664                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1665                 tx->overflow_skb = NULL;
1666                 netif_wake_queue(adapter->netdev);
1667         }
1668
1669         if (!napi_complete(napi))
1670                 goto done;
1671
1672         /* enable isr */
1673         lan743x_csr_write(adapter, INT_EN_SET,
1674                           INT_BIT_DMA_TX_(tx->channel_number));
1675         lan743x_csr_read(adapter, INT_STS);
1676
1677 done:
1678         return 0;
1679 }
1680
1681 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1682 {
1683         if (tx->head_cpu_ptr) {
1684                 pci_free_consistent(tx->adapter->pdev,
1685                                     sizeof(*tx->head_cpu_ptr),
1686                                     (void *)(tx->head_cpu_ptr),
1687                                     tx->head_dma_ptr);
1688                 tx->head_cpu_ptr = NULL;
1689                 tx->head_dma_ptr = 0;
1690         }
1691         kfree(tx->buffer_info);
1692         tx->buffer_info = NULL;
1693
1694         if (tx->ring_cpu_ptr) {
1695                 pci_free_consistent(tx->adapter->pdev,
1696                                     tx->ring_allocation_size,
1697                                     tx->ring_cpu_ptr,
1698                                     tx->ring_dma_ptr);
1699                 tx->ring_allocation_size = 0;
1700                 tx->ring_cpu_ptr = NULL;
1701                 tx->ring_dma_ptr = 0;
1702         }
1703         tx->ring_size = 0;
1704 }
1705
1706 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1707 {
1708         size_t ring_allocation_size = 0;
1709         void *cpu_ptr = NULL;
1710         dma_addr_t dma_ptr;
1711         int ret = -ENOMEM;
1712
1713         tx->ring_size = LAN743X_TX_RING_SIZE;
1714         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1715                 ret = -EINVAL;
1716                 goto cleanup;
1717         }
1718         ring_allocation_size = ALIGN(tx->ring_size *
1719                                      sizeof(struct lan743x_tx_descriptor),
1720                                      PAGE_SIZE);
1721         dma_ptr = 0;
1722         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1723                                         ring_allocation_size, &dma_ptr);
1724         if (!cpu_ptr) {
1725                 ret = -ENOMEM;
1726                 goto cleanup;
1727         }
1728
1729         tx->ring_allocation_size = ring_allocation_size;
1730         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1731         tx->ring_dma_ptr = dma_ptr;
1732
1733         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1734         if (!cpu_ptr) {
1735                 ret = -ENOMEM;
1736                 goto cleanup;
1737         }
1738         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1739         dma_ptr = 0;
1740         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1741                                         sizeof(*tx->head_cpu_ptr), &dma_ptr);
1742         if (!cpu_ptr) {
1743                 ret = -ENOMEM;
1744                 goto cleanup;
1745         }
1746
1747         tx->head_cpu_ptr = cpu_ptr;
1748         tx->head_dma_ptr = dma_ptr;
1749         if (tx->head_dma_ptr & 0x3) {
1750                 ret = -ENOMEM;
1751                 goto cleanup;
1752         }
1753
1754         return 0;
1755
1756 cleanup:
1757         lan743x_tx_ring_cleanup(tx);
1758         return ret;
1759 }
1760
1761 static void lan743x_tx_close(struct lan743x_tx *tx)
1762 {
1763         struct lan743x_adapter *adapter = tx->adapter;
1764
1765         lan743x_csr_write(adapter,
1766                           DMAC_CMD,
1767                           DMAC_CMD_STOP_T_(tx->channel_number));
1768         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1769
1770         lan743x_csr_write(adapter,
1771                           DMAC_INT_EN_CLR,
1772                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1773         lan743x_csr_write(adapter, INT_EN_CLR,
1774                           INT_BIT_DMA_TX_(tx->channel_number));
1775         napi_disable(&tx->napi);
1776         netif_napi_del(&tx->napi);
1777
1778         lan743x_csr_write(adapter, FCT_TX_CTL,
1779                           FCT_TX_CTL_DIS_(tx->channel_number));
1780         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1781                                  FCT_TX_CTL_EN_(tx->channel_number),
1782                                  0, 1000, 20000, 100);
1783
1784         lan743x_tx_release_all_descriptors(tx);
1785
1786         if (tx->overflow_skb) {
1787                 dev_kfree_skb(tx->overflow_skb);
1788                 tx->overflow_skb = NULL;
1789         }
1790
1791         lan743x_tx_ring_cleanup(tx);
1792 }
1793
1794 static int lan743x_tx_open(struct lan743x_tx *tx)
1795 {
1796         struct lan743x_adapter *adapter = NULL;
1797         u32 data = 0;
1798         int ret;
1799
1800         adapter = tx->adapter;
1801         ret = lan743x_tx_ring_init(tx);
1802         if (ret)
1803                 return ret;
1804
1805         /* initialize fifo */
1806         lan743x_csr_write(adapter, FCT_TX_CTL,
1807                           FCT_TX_CTL_RESET_(tx->channel_number));
1808         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1809                                  FCT_TX_CTL_RESET_(tx->channel_number),
1810                                  0, 1000, 20000, 100);
1811
1812         /* enable fifo */
1813         lan743x_csr_write(adapter, FCT_TX_CTL,
1814                           FCT_TX_CTL_EN_(tx->channel_number));
1815
1816         /* reset tx channel */
1817         lan743x_csr_write(adapter, DMAC_CMD,
1818                           DMAC_CMD_TX_SWR_(tx->channel_number));
1819         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1820                                  DMAC_CMD_TX_SWR_(tx->channel_number),
1821                                  0, 1000, 20000, 100);
1822
1823         /* Write TX_BASE_ADDR */
1824         lan743x_csr_write(adapter,
1825                           TX_BASE_ADDRH(tx->channel_number),
1826                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1827         lan743x_csr_write(adapter,
1828                           TX_BASE_ADDRL(tx->channel_number),
1829                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
1830
1831         /* Write TX_CFG_B */
1832         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1833         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1834         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1835         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1836                 data |= TX_CFG_B_TDMABL_512_;
1837         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1838
1839         /* Write TX_CFG_A */
1840         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1841         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1842                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1843                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1844                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1845                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1846         }
1847         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1848
1849         /* Write TX_HEAD_WRITEBACK_ADDR */
1850         lan743x_csr_write(adapter,
1851                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1852                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
1853         lan743x_csr_write(adapter,
1854                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1855                           DMA_ADDR_LOW32(tx->head_dma_ptr));
1856
1857         /* set last head */
1858         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1859
1860         /* write TX_TAIL */
1861         tx->last_tail = 0;
1862         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1863                           (u32)(tx->last_tail));
1864         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1865                                                          INT_BIT_DMA_TX_
1866                                                          (tx->channel_number));
1867         netif_tx_napi_add(adapter->netdev,
1868                           &tx->napi, lan743x_tx_napi_poll,
1869                           tx->ring_size - 1);
1870         napi_enable(&tx->napi);
1871
1872         data = 0;
1873         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1874                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1875         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1876                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1877         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1878                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1879         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1880                 data |= TX_CFG_C_TX_INT_EN_R2C_;
1881         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1882
1883         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1884                 lan743x_csr_write(adapter, INT_EN_SET,
1885                                   INT_BIT_DMA_TX_(tx->channel_number));
1886         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1887                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1888
1889         /*  start dmac channel */
1890         lan743x_csr_write(adapter, DMAC_CMD,
1891                           DMAC_CMD_START_T_(tx->channel_number));
1892         return 0;
1893 }
1894
1895 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1896 {
1897         return ((++index) % rx->ring_size);
1898 }
1899
1900 static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1901 {
1902         struct lan743x_rx_buffer_info *buffer_info;
1903         struct lan743x_rx_descriptor *descriptor;
1904         int length = 0;
1905
1906         length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1907         descriptor = &rx->ring_cpu_ptr[index];
1908         buffer_info = &rx->buffer_info[index];
1909         buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1910                                               length,
1911                                               GFP_ATOMIC | GFP_DMA);
1912         if (!(buffer_info->skb))
1913                 return -ENOMEM;
1914         buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1915                                               buffer_info->skb->data,
1916                                               length,
1917                                               DMA_FROM_DEVICE);
1918         if (dma_mapping_error(&rx->adapter->pdev->dev,
1919                               buffer_info->dma_ptr)) {
1920                 buffer_info->dma_ptr = 0;
1921                 return -ENOMEM;
1922         }
1923
1924         buffer_info->buffer_length = length;
1925         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1926         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1927         descriptor->data3 = 0;
1928         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1929                             (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1930         skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1931
1932         return 0;
1933 }
1934
1935 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1936 {
1937         struct lan743x_rx_buffer_info *buffer_info;
1938         struct lan743x_rx_descriptor *descriptor;
1939
1940         descriptor = &rx->ring_cpu_ptr[index];
1941         buffer_info = &rx->buffer_info[index];
1942
1943         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1944         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1945         descriptor->data3 = 0;
1946         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1947                             ((buffer_info->buffer_length) &
1948                             RX_DESC_DATA0_BUF_LENGTH_MASK_));
1949 }
1950
1951 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1952 {
1953         struct lan743x_rx_buffer_info *buffer_info;
1954         struct lan743x_rx_descriptor *descriptor;
1955
1956         descriptor = &rx->ring_cpu_ptr[index];
1957         buffer_info = &rx->buffer_info[index];
1958
1959         memset(descriptor, 0, sizeof(*descriptor));
1960
1961         if (buffer_info->dma_ptr) {
1962                 dma_unmap_single(&rx->adapter->pdev->dev,
1963                                  buffer_info->dma_ptr,
1964                                  buffer_info->buffer_length,
1965                                  DMA_FROM_DEVICE);
1966                 buffer_info->dma_ptr = 0;
1967         }
1968
1969         if (buffer_info->skb) {
1970                 dev_kfree_skb(buffer_info->skb);
1971                 buffer_info->skb = NULL;
1972         }
1973
1974         memset(buffer_info, 0, sizeof(*buffer_info));
1975 }
1976
1977 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1978 {
1979         struct skb_shared_hwtstamps *hwtstamps = NULL;
1980         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1981         struct lan743x_rx_buffer_info *buffer_info;
1982         struct lan743x_rx_descriptor *descriptor;
1983         int current_head_index = -1;
1984         int extension_index = -1;
1985         int first_index = -1;
1986         int last_index = -1;
1987
1988         current_head_index = *rx->head_cpu_ptr;
1989         if (current_head_index < 0 || current_head_index >= rx->ring_size)
1990                 goto done;
1991
1992         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
1993                 goto done;
1994
1995         if (rx->last_head != current_head_index) {
1996                 descriptor = &rx->ring_cpu_ptr[rx->last_head];
1997                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1998                         goto done;
1999
2000                 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
2001                         goto done;
2002
2003                 first_index = rx->last_head;
2004                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2005                         last_index = rx->last_head;
2006                 } else {
2007                         int index;
2008
2009                         index = lan743x_rx_next_index(rx, first_index);
2010                         while (index != current_head_index) {
2011                                 descriptor = &rx->ring_cpu_ptr[index];
2012                                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2013                                         goto done;
2014
2015                                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2016                                         last_index = index;
2017                                         break;
2018                                 }
2019                                 index = lan743x_rx_next_index(rx, index);
2020                         }
2021                 }
2022                 if (last_index >= 0) {
2023                         descriptor = &rx->ring_cpu_ptr[last_index];
2024                         if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2025                                 /* extension is expected to follow */
2026                                 int index = lan743x_rx_next_index(rx,
2027                                                                   last_index);
2028                                 if (index != current_head_index) {
2029                                         descriptor = &rx->ring_cpu_ptr[index];
2030                                         if (descriptor->data0 &
2031                                             RX_DESC_DATA0_OWN_) {
2032                                                 goto done;
2033                                         }
2034                                         if (descriptor->data0 &
2035                                             RX_DESC_DATA0_EXT_) {
2036                                                 extension_index = index;
2037                                         } else {
2038                                                 goto done;
2039                                         }
2040                                 } else {
2041                                         /* extension is not yet available */
2042                                         /* prevent processing of this packet */
2043                                         first_index = -1;
2044                                         last_index = -1;
2045                                 }
2046                         }
2047                 }
2048         }
2049         if (first_index >= 0 && last_index >= 0) {
2050                 int real_last_index = last_index;
2051                 struct sk_buff *skb = NULL;
2052                 u32 ts_sec = 0;
2053                 u32 ts_nsec = 0;
2054
2055                 /* packet is available */
2056                 if (first_index == last_index) {
2057                         /* single buffer packet */
2058                         int packet_length;
2059
2060                         buffer_info = &rx->buffer_info[first_index];
2061                         skb = buffer_info->skb;
2062                         descriptor = &rx->ring_cpu_ptr[first_index];
2063
2064                         /* unmap from dma */
2065                         if (buffer_info->dma_ptr) {
2066                                 dma_unmap_single(&rx->adapter->pdev->dev,
2067                                                  buffer_info->dma_ptr,
2068                                                  buffer_info->buffer_length,
2069                                                  DMA_FROM_DEVICE);
2070                                 buffer_info->dma_ptr = 0;
2071                                 buffer_info->buffer_length = 0;
2072                         }
2073                         buffer_info->skb = NULL;
2074                         packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2075                                         (descriptor->data0);
2076                         skb_put(skb, packet_length - 4);
2077                         skb->protocol = eth_type_trans(skb,
2078                                                        rx->adapter->netdev);
2079                         lan743x_rx_allocate_ring_element(rx, first_index);
2080                 } else {
2081                         int index = first_index;
2082
2083                         /* multi buffer packet not supported */
2084                         /* this should not happen since
2085                          * buffers are allocated to be at least jumbo size
2086                          */
2087
2088                         /* clean up buffers */
2089                         if (first_index <= last_index) {
2090                                 while ((index >= first_index) &&
2091                                        (index <= last_index)) {
2092                                         lan743x_rx_release_ring_element(rx,
2093                                                                         index);
2094                                         lan743x_rx_allocate_ring_element(rx,
2095                                                                          index);
2096                                         index = lan743x_rx_next_index(rx,
2097                                                                       index);
2098                                 }
2099                         } else {
2100                                 while ((index >= first_index) ||
2101                                        (index <= last_index)) {
2102                                         lan743x_rx_release_ring_element(rx,
2103                                                                         index);
2104                                         lan743x_rx_allocate_ring_element(rx,
2105                                                                          index);
2106                                         index = lan743x_rx_next_index(rx,
2107                                                                       index);
2108                                 }
2109                         }
2110                 }
2111
2112                 if (extension_index >= 0) {
2113                         descriptor = &rx->ring_cpu_ptr[extension_index];
2114                         buffer_info = &rx->buffer_info[extension_index];
2115
2116                         ts_sec = descriptor->data1;
2117                         ts_nsec = (descriptor->data2 &
2118                                   RX_DESC_DATA2_TS_NS_MASK_);
2119                         lan743x_rx_reuse_ring_element(rx, extension_index);
2120                         real_last_index = extension_index;
2121                 }
2122
2123                 if (!skb) {
2124                         result = RX_PROCESS_RESULT_PACKET_DROPPED;
2125                         goto move_forward;
2126                 }
2127
2128                 if (extension_index < 0)
2129                         goto pass_packet_to_os;
2130                 hwtstamps = skb_hwtstamps(skb);
2131                 if (hwtstamps)
2132                         hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2133
2134 pass_packet_to_os:
2135                 /* pass packet to OS */
2136                 napi_gro_receive(&rx->napi, skb);
2137                 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2138
2139 move_forward:
2140                 /* push tail and head forward */
2141                 rx->last_tail = real_last_index;
2142                 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2143         }
2144 done:
2145         return result;
2146 }
2147
2148 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2149 {
2150         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2151         struct lan743x_adapter *adapter = rx->adapter;
2152         u32 rx_tail_flags = 0;
2153         int count;
2154
2155         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2156                 /* clear int status bit before reading packet */
2157                 lan743x_csr_write(adapter, DMAC_INT_STS,
2158                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2159         }
2160         count = 0;
2161         while (count < weight) {
2162                 int rx_process_result = -1;
2163
2164                 rx_process_result = lan743x_rx_process_packet(rx);
2165                 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2166                         count++;
2167                 } else if (rx_process_result ==
2168                         RX_PROCESS_RESULT_NOTHING_TO_DO) {
2169                         break;
2170                 } else if (rx_process_result ==
2171                         RX_PROCESS_RESULT_PACKET_DROPPED) {
2172                         continue;
2173                 }
2174         }
2175         rx->frame_count += count;
2176         if (count == weight)
2177                 goto done;
2178
2179         if (!napi_complete_done(napi, count))
2180                 goto done;
2181
2182         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2183                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2184         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2185                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2186         } else {
2187                 lan743x_csr_write(adapter, INT_EN_SET,
2188                                   INT_BIT_DMA_RX_(rx->channel_number));
2189         }
2190
2191         /* update RX_TAIL */
2192         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2193                           rx_tail_flags | rx->last_tail);
2194 done:
2195         return count;
2196 }
2197
2198 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2199 {
2200         if (rx->buffer_info && rx->ring_cpu_ptr) {
2201                 int index;
2202
2203                 for (index = 0; index < rx->ring_size; index++)
2204                         lan743x_rx_release_ring_element(rx, index);
2205         }
2206
2207         if (rx->head_cpu_ptr) {
2208                 pci_free_consistent(rx->adapter->pdev,
2209                                     sizeof(*rx->head_cpu_ptr),
2210                                     rx->head_cpu_ptr,
2211                                     rx->head_dma_ptr);
2212                 rx->head_cpu_ptr = NULL;
2213                 rx->head_dma_ptr = 0;
2214         }
2215
2216         kfree(rx->buffer_info);
2217         rx->buffer_info = NULL;
2218
2219         if (rx->ring_cpu_ptr) {
2220                 pci_free_consistent(rx->adapter->pdev,
2221                                     rx->ring_allocation_size,
2222                                     rx->ring_cpu_ptr,
2223                                     rx->ring_dma_ptr);
2224                 rx->ring_allocation_size = 0;
2225                 rx->ring_cpu_ptr = NULL;
2226                 rx->ring_dma_ptr = 0;
2227         }
2228
2229         rx->ring_size = 0;
2230         rx->last_head = 0;
2231 }
2232
2233 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2234 {
2235         size_t ring_allocation_size = 0;
2236         dma_addr_t dma_ptr = 0;
2237         void *cpu_ptr = NULL;
2238         int ret = -ENOMEM;
2239         int index = 0;
2240
2241         rx->ring_size = LAN743X_RX_RING_SIZE;
2242         if (rx->ring_size <= 1) {
2243                 ret = -EINVAL;
2244                 goto cleanup;
2245         }
2246         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2247                 ret = -EINVAL;
2248                 goto cleanup;
2249         }
2250         ring_allocation_size = ALIGN(rx->ring_size *
2251                                      sizeof(struct lan743x_rx_descriptor),
2252                                      PAGE_SIZE);
2253         dma_ptr = 0;
2254         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2255                                         ring_allocation_size, &dma_ptr);
2256         if (!cpu_ptr) {
2257                 ret = -ENOMEM;
2258                 goto cleanup;
2259         }
2260         rx->ring_allocation_size = ring_allocation_size;
2261         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2262         rx->ring_dma_ptr = dma_ptr;
2263
2264         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2265                           GFP_KERNEL);
2266         if (!cpu_ptr) {
2267                 ret = -ENOMEM;
2268                 goto cleanup;
2269         }
2270         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2271         dma_ptr = 0;
2272         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2273                                         sizeof(*rx->head_cpu_ptr), &dma_ptr);
2274         if (!cpu_ptr) {
2275                 ret = -ENOMEM;
2276                 goto cleanup;
2277         }
2278
2279         rx->head_cpu_ptr = cpu_ptr;
2280         rx->head_dma_ptr = dma_ptr;
2281         if (rx->head_dma_ptr & 0x3) {
2282                 ret = -ENOMEM;
2283                 goto cleanup;
2284         }
2285
2286         rx->last_head = 0;
2287         for (index = 0; index < rx->ring_size; index++) {
2288                 ret = lan743x_rx_allocate_ring_element(rx, index);
2289                 if (ret)
2290                         goto cleanup;
2291         }
2292         return 0;
2293
2294 cleanup:
2295         lan743x_rx_ring_cleanup(rx);
2296         return ret;
2297 }
2298
2299 static void lan743x_rx_close(struct lan743x_rx *rx)
2300 {
2301         struct lan743x_adapter *adapter = rx->adapter;
2302
2303         lan743x_csr_write(adapter, FCT_RX_CTL,
2304                           FCT_RX_CTL_DIS_(rx->channel_number));
2305         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2306                                  FCT_RX_CTL_EN_(rx->channel_number),
2307                                  0, 1000, 20000, 100);
2308
2309         lan743x_csr_write(adapter, DMAC_CMD,
2310                           DMAC_CMD_STOP_R_(rx->channel_number));
2311         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2312
2313         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2314                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2315         lan743x_csr_write(adapter, INT_EN_CLR,
2316                           INT_BIT_DMA_RX_(rx->channel_number));
2317         napi_disable(&rx->napi);
2318
2319         netif_napi_del(&rx->napi);
2320
2321         lan743x_rx_ring_cleanup(rx);
2322 }
2323
2324 static int lan743x_rx_open(struct lan743x_rx *rx)
2325 {
2326         struct lan743x_adapter *adapter = rx->adapter;
2327         u32 data = 0;
2328         int ret;
2329
2330         rx->frame_count = 0;
2331         ret = lan743x_rx_ring_init(rx);
2332         if (ret)
2333                 goto return_error;
2334
2335         netif_napi_add(adapter->netdev,
2336                        &rx->napi, lan743x_rx_napi_poll,
2337                        rx->ring_size - 1);
2338
2339         lan743x_csr_write(adapter, DMAC_CMD,
2340                           DMAC_CMD_RX_SWR_(rx->channel_number));
2341         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2342                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2343                                  0, 1000, 20000, 100);
2344
2345         /* set ring base address */
2346         lan743x_csr_write(adapter,
2347                           RX_BASE_ADDRH(rx->channel_number),
2348                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2349         lan743x_csr_write(adapter,
2350                           RX_BASE_ADDRL(rx->channel_number),
2351                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2352
2353         /* set rx write back address */
2354         lan743x_csr_write(adapter,
2355                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2356                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2357         lan743x_csr_write(adapter,
2358                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2359                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2360         data = RX_CFG_A_RX_HP_WB_EN_;
2361         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2362                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2363                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2364                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2365                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2366         }
2367
2368         /* set RX_CFG_A */
2369         lan743x_csr_write(adapter,
2370                           RX_CFG_A(rx->channel_number), data);
2371
2372         /* set RX_CFG_B */
2373         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2374         data &= ~RX_CFG_B_RX_PAD_MASK_;
2375         if (!RX_HEAD_PADDING)
2376                 data |= RX_CFG_B_RX_PAD_0_;
2377         else
2378                 data |= RX_CFG_B_RX_PAD_2_;
2379         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2380         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2381         data |= RX_CFG_B_TS_ALL_RX_;
2382         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2383                 data |= RX_CFG_B_RDMABL_512_;
2384
2385         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2386         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2387                                                          INT_BIT_DMA_RX_
2388                                                          (rx->channel_number));
2389
2390         /* set RX_CFG_C */
2391         data = 0;
2392         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2393                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2394         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2395                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2396         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2397                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2398         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2399                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2400         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2401
2402         rx->last_tail = ((u32)(rx->ring_size - 1));
2403         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2404                           rx->last_tail);
2405         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2406         if (rx->last_head) {
2407                 ret = -EIO;
2408                 goto napi_delete;
2409         }
2410
2411         napi_enable(&rx->napi);
2412
2413         lan743x_csr_write(adapter, INT_EN_SET,
2414                           INT_BIT_DMA_RX_(rx->channel_number));
2415         lan743x_csr_write(adapter, DMAC_INT_STS,
2416                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2417         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2418                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2419         lan743x_csr_write(adapter, DMAC_CMD,
2420                           DMAC_CMD_START_R_(rx->channel_number));
2421
2422         /* initialize fifo */
2423         lan743x_csr_write(adapter, FCT_RX_CTL,
2424                           FCT_RX_CTL_RESET_(rx->channel_number));
2425         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2426                                  FCT_RX_CTL_RESET_(rx->channel_number),
2427                                  0, 1000, 20000, 100);
2428         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2429                           FCT_FLOW_CTL_REQ_EN_ |
2430                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2431                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2432
2433         /* enable fifo */
2434         lan743x_csr_write(adapter, FCT_RX_CTL,
2435                           FCT_RX_CTL_EN_(rx->channel_number));
2436         return 0;
2437
2438 napi_delete:
2439         netif_napi_del(&rx->napi);
2440         lan743x_rx_ring_cleanup(rx);
2441
2442 return_error:
2443         return ret;
2444 }
2445
2446 static int lan743x_netdev_close(struct net_device *netdev)
2447 {
2448         struct lan743x_adapter *adapter = netdev_priv(netdev);
2449         int index;
2450
2451         lan743x_tx_close(&adapter->tx[0]);
2452
2453         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2454                 lan743x_rx_close(&adapter->rx[index]);
2455
2456         lan743x_ptp_close(adapter);
2457
2458         lan743x_phy_close(adapter);
2459
2460         lan743x_mac_close(adapter);
2461
2462         lan743x_intr_close(adapter);
2463
2464         return 0;
2465 }
2466
2467 static int lan743x_netdev_open(struct net_device *netdev)
2468 {
2469         struct lan743x_adapter *adapter = netdev_priv(netdev);
2470         int index;
2471         int ret;
2472
2473         ret = lan743x_intr_open(adapter);
2474         if (ret)
2475                 goto return_error;
2476
2477         ret = lan743x_mac_open(adapter);
2478         if (ret)
2479                 goto close_intr;
2480
2481         ret = lan743x_phy_open(adapter);
2482         if (ret)
2483                 goto close_mac;
2484
2485         ret = lan743x_ptp_open(adapter);
2486         if (ret)
2487                 goto close_phy;
2488
2489         lan743x_rfe_open(adapter);
2490
2491         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2492                 ret = lan743x_rx_open(&adapter->rx[index]);
2493                 if (ret)
2494                         goto close_rx;
2495         }
2496
2497         ret = lan743x_tx_open(&adapter->tx[0]);
2498         if (ret)
2499                 goto close_rx;
2500
2501         return 0;
2502
2503 close_rx:
2504         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2505                 if (adapter->rx[index].ring_cpu_ptr)
2506                         lan743x_rx_close(&adapter->rx[index]);
2507         }
2508         lan743x_ptp_close(adapter);
2509
2510 close_phy:
2511         lan743x_phy_close(adapter);
2512
2513 close_mac:
2514         lan743x_mac_close(adapter);
2515
2516 close_intr:
2517         lan743x_intr_close(adapter);
2518
2519 return_error:
2520         netif_warn(adapter, ifup, adapter->netdev,
2521                    "Error opening LAN743x\n");
2522         return ret;
2523 }
2524
2525 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2526                                              struct net_device *netdev)
2527 {
2528         struct lan743x_adapter *adapter = netdev_priv(netdev);
2529
2530         return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2531 }
2532
2533 static int lan743x_netdev_ioctl(struct net_device *netdev,
2534                                 struct ifreq *ifr, int cmd)
2535 {
2536         if (!netif_running(netdev))
2537                 return -EINVAL;
2538         if (cmd == SIOCSHWTSTAMP)
2539                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2540         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2541 }
2542
2543 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2544 {
2545         struct lan743x_adapter *adapter = netdev_priv(netdev);
2546
2547         lan743x_rfe_set_multicast(adapter);
2548 }
2549
2550 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2551 {
2552         struct lan743x_adapter *adapter = netdev_priv(netdev);
2553         int ret = 0;
2554
2555         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2556         if (!ret)
2557                 netdev->mtu = new_mtu;
2558         return ret;
2559 }
2560
2561 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2562                                        struct rtnl_link_stats64 *stats)
2563 {
2564         struct lan743x_adapter *adapter = netdev_priv(netdev);
2565
2566         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2567         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2568         stats->rx_bytes = lan743x_csr_read(adapter,
2569                                            STAT_RX_UNICAST_BYTE_COUNT) +
2570                           lan743x_csr_read(adapter,
2571                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2572                           lan743x_csr_read(adapter,
2573                                            STAT_RX_MULTICAST_BYTE_COUNT);
2574         stats->tx_bytes = lan743x_csr_read(adapter,
2575                                            STAT_TX_UNICAST_BYTE_COUNT) +
2576                           lan743x_csr_read(adapter,
2577                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2578                           lan743x_csr_read(adapter,
2579                                            STAT_TX_MULTICAST_BYTE_COUNT);
2580         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2581                            lan743x_csr_read(adapter,
2582                                             STAT_RX_ALIGNMENT_ERRORS) +
2583                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2584                            lan743x_csr_read(adapter,
2585                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2586                            lan743x_csr_read(adapter,
2587                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2588         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2589                            lan743x_csr_read(adapter,
2590                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2591                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2592         stats->rx_dropped = lan743x_csr_read(adapter,
2593                                              STAT_RX_DROPPED_FRAMES);
2594         stats->tx_dropped = lan743x_csr_read(adapter,
2595                                              STAT_TX_EXCESSIVE_COLLISION);
2596         stats->multicast = lan743x_csr_read(adapter,
2597                                             STAT_RX_MULTICAST_FRAMES) +
2598                            lan743x_csr_read(adapter,
2599                                             STAT_TX_MULTICAST_FRAMES);
2600         stats->collisions = lan743x_csr_read(adapter,
2601                                              STAT_TX_SINGLE_COLLISIONS) +
2602                             lan743x_csr_read(adapter,
2603                                              STAT_TX_MULTIPLE_COLLISIONS) +
2604                             lan743x_csr_read(adapter,
2605                                              STAT_TX_LATE_COLLISIONS);
2606 }
2607
2608 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2609                                           void *addr)
2610 {
2611         struct lan743x_adapter *adapter = netdev_priv(netdev);
2612         struct sockaddr *sock_addr = addr;
2613         int ret;
2614
2615         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2616         if (ret)
2617                 return ret;
2618         ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2619         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2620         lan743x_rfe_update_mac_address(adapter);
2621         return 0;
2622 }
2623
2624 static const struct net_device_ops lan743x_netdev_ops = {
2625         .ndo_open               = lan743x_netdev_open,
2626         .ndo_stop               = lan743x_netdev_close,
2627         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2628         .ndo_do_ioctl           = lan743x_netdev_ioctl,
2629         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2630         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2631         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2632         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2633 };
2634
2635 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2636 {
2637         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2638 }
2639
2640 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2641 {
2642         mdiobus_unregister(adapter->mdiobus);
2643 }
2644
2645 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2646 {
2647         unregister_netdev(adapter->netdev);
2648
2649         lan743x_mdiobus_cleanup(adapter);
2650         lan743x_hardware_cleanup(adapter);
2651         lan743x_pci_cleanup(adapter);
2652 }
2653
2654 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2655                                  struct pci_dev *pdev)
2656 {
2657         struct lan743x_tx *tx;
2658         int index;
2659         int ret;
2660
2661         adapter->intr.irq = adapter->pdev->irq;
2662         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2663         mutex_init(&adapter->dp_lock);
2664
2665         ret = lan743x_gpio_init(adapter);
2666         if (ret)
2667                 return ret;
2668
2669         ret = lan743x_mac_init(adapter);
2670         if (ret)
2671                 return ret;
2672
2673         ret = lan743x_phy_init(adapter);
2674         if (ret)
2675                 return ret;
2676
2677         ret = lan743x_ptp_init(adapter);
2678         if (ret)
2679                 return ret;
2680
2681         lan743x_rfe_update_mac_address(adapter);
2682
2683         ret = lan743x_dmac_init(adapter);
2684         if (ret)
2685                 return ret;
2686
2687         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2688                 adapter->rx[index].adapter = adapter;
2689                 adapter->rx[index].channel_number = index;
2690         }
2691
2692         tx = &adapter->tx[0];
2693         tx->adapter = adapter;
2694         tx->channel_number = 0;
2695         spin_lock_init(&tx->ring_lock);
2696         return 0;
2697 }
2698
2699 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2700 {
2701         int ret;
2702
2703         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2704         if (!(adapter->mdiobus)) {
2705                 ret = -ENOMEM;
2706                 goto return_error;
2707         }
2708
2709         adapter->mdiobus->priv = (void *)adapter;
2710         adapter->mdiobus->read = lan743x_mdiobus_read;
2711         adapter->mdiobus->write = lan743x_mdiobus_write;
2712         adapter->mdiobus->name = "lan743x-mdiobus";
2713         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2714                  "pci-%s", pci_name(adapter->pdev));
2715
2716         if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2717                 /* LAN7430 uses internal phy at address 1 */
2718                 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2719
2720         /* register mdiobus */
2721         ret = mdiobus_register(adapter->mdiobus);
2722         if (ret < 0)
2723                 goto return_error;
2724         return 0;
2725
2726 return_error:
2727         return ret;
2728 }
2729
2730 /* lan743x_pcidev_probe - Device Initialization Routine
2731  * @pdev: PCI device information struct
2732  * @id: entry in lan743x_pci_tbl
2733  *
2734  * Returns 0 on success, negative on failure
2735  *
2736  * initializes an adapter identified by a pci_dev structure.
2737  * The OS initialization, configuring of the adapter private structure,
2738  * and a hardware reset occur.
2739  **/
2740 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2741                                 const struct pci_device_id *id)
2742 {
2743         struct lan743x_adapter *adapter = NULL;
2744         struct net_device *netdev = NULL;
2745         int ret = -ENODEV;
2746
2747         netdev = devm_alloc_etherdev(&pdev->dev,
2748                                      sizeof(struct lan743x_adapter));
2749         if (!netdev)
2750                 goto return_error;
2751
2752         SET_NETDEV_DEV(netdev, &pdev->dev);
2753         pci_set_drvdata(pdev, netdev);
2754         adapter = netdev_priv(netdev);
2755         adapter->netdev = netdev;
2756         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2757                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
2758                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2759         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2760
2761         ret = lan743x_pci_init(adapter, pdev);
2762         if (ret)
2763                 goto return_error;
2764
2765         ret = lan743x_csr_init(adapter);
2766         if (ret)
2767                 goto cleanup_pci;
2768
2769         ret = lan743x_hardware_init(adapter, pdev);
2770         if (ret)
2771                 goto cleanup_pci;
2772
2773         ret = lan743x_mdiobus_init(adapter);
2774         if (ret)
2775                 goto cleanup_hardware;
2776
2777         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2778         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2779         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2780         adapter->netdev->hw_features = adapter->netdev->features;
2781
2782         /* carrier off reporting is important to ethtool even BEFORE open */
2783         netif_carrier_off(netdev);
2784
2785         ret = register_netdev(adapter->netdev);
2786         if (ret < 0)
2787                 goto cleanup_mdiobus;
2788         return 0;
2789
2790 cleanup_mdiobus:
2791         lan743x_mdiobus_cleanup(adapter);
2792
2793 cleanup_hardware:
2794         lan743x_hardware_cleanup(adapter);
2795
2796 cleanup_pci:
2797         lan743x_pci_cleanup(adapter);
2798
2799 return_error:
2800         pr_warn("Initialization failed\n");
2801         return ret;
2802 }
2803
2804 /**
2805  * lan743x_pcidev_remove - Device Removal Routine
2806  * @pdev: PCI device information struct
2807  *
2808  * this is called by the PCI subsystem to alert the driver
2809  * that it should release a PCI device.  This could be caused by a
2810  * Hot-Plug event, or because the driver is going to be removed from
2811  * memory.
2812  **/
2813 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2814 {
2815         struct net_device *netdev = pci_get_drvdata(pdev);
2816         struct lan743x_adapter *adapter = netdev_priv(netdev);
2817
2818         lan743x_full_cleanup(adapter);
2819 }
2820
2821 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2822 {
2823         struct net_device *netdev = pci_get_drvdata(pdev);
2824         struct lan743x_adapter *adapter = netdev_priv(netdev);
2825
2826         rtnl_lock();
2827         netif_device_detach(netdev);
2828
2829         /* close netdev when netdev is at running state.
2830          * For instance, it is true when system goes to sleep by pm-suspend
2831          * However, it is false when system goes to sleep by suspend GUI menu
2832          */
2833         if (netif_running(netdev))
2834                 lan743x_netdev_close(netdev);
2835         rtnl_unlock();
2836
2837 #ifdef CONFIG_PM
2838         pci_save_state(pdev);
2839 #endif
2840
2841         /* clean up lan743x portion */
2842         lan743x_hardware_cleanup(adapter);
2843 }
2844
2845 #ifdef CONFIG_PM_SLEEP
2846 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2847 {
2848         return bitrev16(crc16(0xFFFF, buf, len));
2849 }
2850
2851 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2852 {
2853         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2854         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2855         const u8 arp_type[2] = { 0x08, 0x06 };
2856         int mask_index;
2857         u32 pmtctl;
2858         u32 wucsr;
2859         u32 macrx;
2860         u16 crc;
2861
2862         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2863                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2864
2865         /* clear wake settings */
2866         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2867         pmtctl |= PMT_CTL_WUPS_MASK_;
2868         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2869                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2870                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2871
2872         macrx = lan743x_csr_read(adapter, MAC_RX);
2873
2874         wucsr = 0;
2875         mask_index = 0;
2876
2877         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2878
2879         if (adapter->wolopts & WAKE_PHY) {
2880                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2881                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2882         }
2883         if (adapter->wolopts & WAKE_MAGIC) {
2884                 wucsr |= MAC_WUCSR_MPEN_;
2885                 macrx |= MAC_RX_RXEN_;
2886                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2887         }
2888         if (adapter->wolopts & WAKE_UCAST) {
2889                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2890                 macrx |= MAC_RX_RXEN_;
2891                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2892                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2893         }
2894         if (adapter->wolopts & WAKE_BCAST) {
2895                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2896                 macrx |= MAC_RX_RXEN_;
2897                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2898                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2899         }
2900         if (adapter->wolopts & WAKE_MCAST) {
2901                 /* IPv4 multicast */
2902                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2903                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2904                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2905                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2906                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2907                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2908                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2909                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2910                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2911                 mask_index++;
2912
2913                 /* IPv6 multicast */
2914                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2915                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2916                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2917                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2918                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2919                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2920                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2921                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2922                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2923                 mask_index++;
2924
2925                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2926                 macrx |= MAC_RX_RXEN_;
2927                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2928                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2929         }
2930         if (adapter->wolopts & WAKE_ARP) {
2931                 /* set MAC_WUF_CFG & WUF_MASK
2932                  * for packettype (offset 12,13) = ARP (0x0806)
2933                  */
2934                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2935                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2936                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2937                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2938                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2939                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2940                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2941                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2942                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2943                 mask_index++;
2944
2945                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2946                 macrx |= MAC_RX_RXEN_;
2947                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2948                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2949         }
2950
2951         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2952         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2953         lan743x_csr_write(adapter, MAC_RX, macrx);
2954 }
2955
2956 static int lan743x_pm_suspend(struct device *dev)
2957 {
2958         struct pci_dev *pdev = to_pci_dev(dev);
2959         struct net_device *netdev = pci_get_drvdata(pdev);
2960         struct lan743x_adapter *adapter = netdev_priv(netdev);
2961         int ret;
2962
2963         lan743x_pcidev_shutdown(pdev);
2964
2965         /* clear all wakes */
2966         lan743x_csr_write(adapter, MAC_WUCSR, 0);
2967         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2968         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
2969
2970         if (adapter->wolopts)
2971                 lan743x_pm_set_wol(adapter);
2972
2973         /* Host sets PME_En, put D3hot */
2974         ret = pci_prepare_to_sleep(pdev);
2975
2976         return 0;
2977 }
2978
2979 static int lan743x_pm_resume(struct device *dev)
2980 {
2981         struct pci_dev *pdev = to_pci_dev(dev);
2982         struct net_device *netdev = pci_get_drvdata(pdev);
2983         struct lan743x_adapter *adapter = netdev_priv(netdev);
2984         int ret;
2985
2986         pci_set_power_state(pdev, PCI_D0);
2987         pci_restore_state(pdev);
2988         pci_save_state(pdev);
2989
2990         ret = lan743x_hardware_init(adapter, pdev);
2991         if (ret) {
2992                 netif_err(adapter, probe, adapter->netdev,
2993                           "lan743x_hardware_init returned %d\n", ret);
2994         }
2995
2996         /* open netdev when netdev is at running state while resume.
2997          * For instance, it is true when system wakesup after pm-suspend
2998          * However, it is false when system wakes up after suspend GUI menu
2999          */
3000         if (netif_running(netdev))
3001                 lan743x_netdev_open(netdev);
3002
3003         netif_device_attach(netdev);
3004
3005         return 0;
3006 }
3007
3008 static const struct dev_pm_ops lan743x_pm_ops = {
3009         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3010 };
3011 #endif /* CONFIG_PM_SLEEP */
3012
3013 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3014         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3015         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3016         { 0, }
3017 };
3018
3019 static struct pci_driver lan743x_pcidev_driver = {
3020         .name     = DRIVER_NAME,
3021         .id_table = lan743x_pcidev_tbl,
3022         .probe    = lan743x_pcidev_probe,
3023         .remove   = lan743x_pcidev_remove,
3024 #ifdef CONFIG_PM_SLEEP
3025         .driver.pm = &lan743x_pm_ops,
3026 #endif
3027         .shutdown = lan743x_pcidev_shutdown,
3028 };
3029
3030 module_pci_driver(lan743x_pcidev_driver);
3031
3032 MODULE_AUTHOR(DRIVER_AUTHOR);
3033 MODULE_DESCRIPTION(DRIVER_DESC);
3034 MODULE_LICENSE("GPL");