drivers/net/ethernet/microchip/lan743x_main.c

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /* Copyright (C) 2018 Microchip Technology Inc. */
   3
   4 #include <linux/module.h>
   5 #include <linux/pci.h>
   6 #include <linux/netdevice.h>
   7 #include <linux/etherdevice.h>
   8 #include <linux/crc32.h>
   9 #include <linux/microchipphy.h>
  10 #include <linux/net_tstamp.h>
  11 #include <linux/phy.h>
  12 #include <linux/rtnetlink.h>
  13 #include <linux/iopoll.h>
  14 #include <linux/crc16.h>
  15 #include "lan743x_main.h"
  16 #include "lan743x_ethtool.h"
  17
  18 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  19 {
  20         pci_release_selected_regions(adapter->pdev,
  21                                      pci_select_bars(adapter->pdev,
  22                                                      IORESOURCE_MEM));
  23         pci_disable_device(adapter->pdev);
  24 }
  25
  26 static int lan743x_pci_init(struct lan743x_adapter *adapter,
  27                             struct pci_dev *pdev)
  28 {
  29         unsigned long bars = 0;
  30         int ret;
  31
  32         adapter->pdev = pdev;
  33         ret = pci_enable_device_mem(pdev);
  34         if (ret)
  35                 goto return_error;
  36
  37         netif_info(adapter, probe, adapter->netdev,
  38                    "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
  39                    pdev->vendor, pdev->device);
  40         bars = pci_select_bars(pdev, IORESOURCE_MEM);
  41         if (!test_bit(0, &bars))
  42                 goto disable_device;
  43
  44         ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
  45         if (ret)
  46                 goto disable_device;
  47
  48         pci_set_master(pdev);
  49         return 0;
  50
  51 disable_device:
  52         pci_disable_device(adapter->pdev);
  53
  54 return_error:
  55         return ret;
  56 }
  57
  58 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
  59 {
  60         return ioread32(&adapter->csr.csr_address[offset]);
  61 }
  62
  63 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
  64                        u32 data)
  65 {
  66         iowrite32(data, &adapter->csr.csr_address[offset]);
  67 }
  68
  69 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
  70
  71 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
  72 {
  73         u32 data;
  74
  75         data = lan743x_csr_read(adapter, HW_CFG);
  76         data |= HW_CFG_LRST_;
  77         lan743x_csr_write(adapter, HW_CFG, data);
  78
  79         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
  80                                   !(data & HW_CFG_LRST_), 100000, 10000000);
  81 }
  82
  83 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
  84                                     int offset, u32 bit_mask,
  85                                     int target_value, int usleep_min,
  86                                     int usleep_max, int count)
  87 {
  88         u32 data;
  89
  90         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
  91                                   target_value == ((data & bit_mask) ? 1 : 0),
  92                                   usleep_max, usleep_min * count);
  93 }
  94
  95 static int lan743x_csr_init(struct lan743x_adapter *adapter)
  96 {
  97         struct lan743x_csr *csr = &adapter->csr;
  98         resource_size_t bar_start, bar_length;
  99         int result;
 100
 101         bar_start = pci_resource_start(adapter->pdev, 0);
 102         bar_length = pci_resource_len(adapter->pdev, 0);
 103         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 104                                         bar_start, bar_length);
 105         if (!csr->csr_address) {
 106                 result = -ENOMEM;
 107                 goto clean_up;
 108         }
 109
 110         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 111         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 112         netif_info(adapter, probe, adapter->netdev,
 113                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 114                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 115                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 116         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 117                 result = -ENODEV;
 118                 goto clean_up;
 119         }
 120
 121         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 122         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 123         case ID_REV_CHIP_REV_A0_:
 124                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 125                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 126                 break;
 127         case ID_REV_CHIP_REV_B0_:
 128                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 129                 break;
 130         }
 131
 132         result = lan743x_csr_light_reset(adapter);
 133         if (result)
 134                 goto clean_up;
 135         return 0;
 136 clean_up:
 137         return result;
 138 }
 139
 140 static void lan743x_intr_software_isr(void *context)
 141 {
 142         struct lan743x_adapter *adapter = context;
 143         struct lan743x_intr *intr = &adapter->intr;
 144         u32 int_sts;
 145
 146         int_sts = lan743x_csr_read(adapter, INT_STS);
 147         if (int_sts & INT_BIT_SW_GP_) {
 148                 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
 149                 intr->software_isr_flag = 1;
 150         }
 151 }
 152
 153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 154 {
 155         struct lan743x_tx *tx = context;
 156         struct lan743x_adapter *adapter = tx->adapter;
 157         bool enable_flag = true;
 158         u32 int_en = 0;
 159
 160         int_en = lan743x_csr_read(adapter, INT_EN_SET);
 161         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 162                 lan743x_csr_write(adapter, INT_EN_CLR,
 163                                   INT_BIT_DMA_TX_(tx->channel_number));
 164         }
 165
 166         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 167                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 168                 u32 dmac_int_sts;
 169                 u32 dmac_int_en;
 170
 171                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 172                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 173                 else
 174                         dmac_int_sts = ioc_bit;
 175                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 176                         dmac_int_en = lan743x_csr_read(adapter,
 177                                                        DMAC_INT_EN_SET);
 178                 else
 179                         dmac_int_en = ioc_bit;
 180
 181                 dmac_int_en &= ioc_bit;
 182                 dmac_int_sts &= dmac_int_en;
 183                 if (dmac_int_sts & ioc_bit) {
 184                         napi_schedule(&tx->napi);
 185                         enable_flag = false;/* poll func will enable later */
 186                 }
 187         }
 188
 189         if (enable_flag)
 190                 /* enable isr */
 191                 lan743x_csr_write(adapter, INT_EN_SET,
 192                                   INT_BIT_DMA_TX_(tx->channel_number));
 193 }
 194
 195 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 196 {
 197         struct lan743x_rx *rx = context;
 198         struct lan743x_adapter *adapter = rx->adapter;
 199         bool enable_flag = true;
 200
 201         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 202                 lan743x_csr_write(adapter, INT_EN_CLR,
 203                                   INT_BIT_DMA_RX_(rx->channel_number));
 204         }
 205
 206         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 207                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 208                 u32 dmac_int_sts;
 209                 u32 dmac_int_en;
 210
 211                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 212                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 213                 else
 214                         dmac_int_sts = rx_frame_bit;
 215                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 216                         dmac_int_en = lan743x_csr_read(adapter,
 217                                                        DMAC_INT_EN_SET);
 218                 else
 219                         dmac_int_en = rx_frame_bit;
 220
 221                 dmac_int_en &= rx_frame_bit;
 222                 dmac_int_sts &= dmac_int_en;
 223                 if (dmac_int_sts & rx_frame_bit) {
 224                         napi_schedule(&rx->napi);
 225                         enable_flag = false;/* poll funct will enable later */
 226                 }
 227         }
 228
 229         if (enable_flag) {
 230                 /* enable isr */
 231                 lan743x_csr_write(adapter, INT_EN_SET,
 232                                   INT_BIT_DMA_RX_(rx->channel_number));
 233         }
 234 }
 235
 236 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 237 {
 238         struct lan743x_adapter *adapter = context;
 239         unsigned int channel;
 240
 241         if (int_sts & INT_BIT_ALL_RX_) {
 242                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 243                         channel++) {
 244                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 245
 246                         if (int_sts & int_bit) {
 247                                 lan743x_rx_isr(&adapter->rx[channel],
 248                                                int_bit, flags);
 249                                 int_sts &= ~int_bit;
 250                         }
 251                 }
 252         }
 253         if (int_sts & INT_BIT_ALL_TX_) {
 254                 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
 255                         channel++) {
 256                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 257
 258                         if (int_sts & int_bit) {
 259                                 lan743x_tx_isr(&adapter->tx[channel],
 260                                                int_bit, flags);
 261                                 int_sts &= ~int_bit;
 262                         }
 263                 }
 264         }
 265         if (int_sts & INT_BIT_ALL_OTHER_) {
 266                 if (int_sts & INT_BIT_SW_GP_) {
 267                         lan743x_intr_software_isr(adapter);
 268                         int_sts &= ~INT_BIT_SW_GP_;
 269                 }
 270                 if (int_sts & INT_BIT_1588_) {
 271                         lan743x_ptp_isr(adapter);
 272                         int_sts &= ~INT_BIT_1588_;
 273                 }
 274         }
 275         if (int_sts)
 276                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 277 }
 278
 279 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 280 {
 281         struct lan743x_vector *vector = ptr;
 282         struct lan743x_adapter *adapter = vector->adapter;
 283         irqreturn_t result = IRQ_NONE;
 284         u32 int_enables;
 285         u32 int_sts;
 286
 287         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 288                 int_sts = lan743x_csr_read(adapter, INT_STS);
 289         } else if (vector->flags &
 290                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 291                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 292                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 293         } else {
 294                 /* use mask as implied status */
 295                 int_sts = vector->int_mask | INT_BIT_MAS_;
 296         }
 297
 298         if (!(int_sts & INT_BIT_MAS_))
 299                 goto irq_done;
 300
 301         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 302                 /* disable vector interrupt */
 303                 lan743x_csr_write(adapter,
 304                                   INT_VEC_EN_CLR,
 305                                   INT_VEC_EN_(vector->vector_index));
 306
 307         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 308                 /* disable master interrupt */
 309                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 310
 311         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 312                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 313         } else {
 314                 /*  use vector mask as implied enable mask */
 315                 int_enables = vector->int_mask;
 316         }
 317
 318         int_sts &= int_enables;
 319         int_sts &= vector->int_mask;
 320         if (int_sts) {
 321                 if (vector->handler) {
 322                         vector->handler(vector->context,
 323                                         int_sts, vector->flags);
 324                 } else {
 325                         /* disable interrupts on this vector */
 326                         lan743x_csr_write(adapter, INT_EN_CLR,
 327                                           vector->int_mask);
 328                 }
 329                 result = IRQ_HANDLED;
 330         }
 331
 332         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 333                 /* enable master interrupt */
 334                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 335
 336         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 337                 /* enable vector interrupt */
 338                 lan743x_csr_write(adapter,
 339                                   INT_VEC_EN_SET,
 340                                   INT_VEC_EN_(vector->vector_index));
 341 irq_done:
 342         return result;
 343 }
 344
 345 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 346 {
 347         struct lan743x_intr *intr = &adapter->intr;
 348         int result = -ENODEV;
 349         int timeout = 10;
 350
 351         intr->software_isr_flag = 0;
 352
 353         /* enable interrupt */
 354         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 355
 356         /* activate interrupt here */
 357         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 358         while ((timeout > 0) && (!(intr->software_isr_flag))) {
 359                 usleep_range(1000, 20000);
 360                 timeout--;
 361         }
 362
 363         if (intr->software_isr_flag)
 364                 result = 0;
 365
 366         /* disable interrupts */
 367         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 368         return result;
 369 }
 370
 371 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 372                                      int vector_index, u32 flags,
 373                                      u32 int_mask,
 374                                      lan743x_vector_handler handler,
 375                                      void *context)
 376 {
 377         struct lan743x_vector *vector = &adapter->intr.vector_list
 378                                         [vector_index];
 379         int ret;
 380
 381         vector->adapter = adapter;
 382         vector->flags = flags;
 383         vector->vector_index = vector_index;
 384         vector->int_mask = int_mask;
 385         vector->handler = handler;
 386         vector->context = context;
 387
 388         ret = request_irq(vector->irq,
 389                           lan743x_intr_entry_isr,
 390                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 391                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 392         if (ret) {
 393                 vector->handler = NULL;
 394                 vector->context = NULL;
 395                 vector->int_mask = 0;
 396                 vector->flags = 0;
 397         }
 398         return ret;
 399 }
 400
 401 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 402                                         int vector_index)
 403 {
 404         struct lan743x_vector *vector = &adapter->intr.vector_list
 405                                         [vector_index];
 406
 407         free_irq(vector->irq, vector);
 408         vector->handler = NULL;
 409         vector->context = NULL;
 410         vector->int_mask = 0;
 411         vector->flags = 0;
 412 }
 413
 414 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 415                                          u32 int_mask)
 416 {
 417         int index;
 418
 419         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 420                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 421                         return adapter->intr.vector_list[index].flags;
 422         }
 423         return 0;
 424 }
 425
 426 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 427 {
 428         struct lan743x_intr *intr = &adapter->intr;
 429         int index = 0;
 430
 431         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 432         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 433
 434         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 435                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 436                         lan743x_intr_unregister_isr(adapter, index);
 437                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 438                 }
 439         }
 440
 441         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 442                 pci_disable_msi(adapter->pdev);
 443                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 444         }
 445
 446         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 447                 pci_disable_msix(adapter->pdev);
 448                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 449         }
 450 }
 451
 452 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 453 {
 454         struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
 455         struct lan743x_intr *intr = &adapter->intr;
 456         u32 int_vec_en_auto_clr = 0;
 457         u32 int_vec_map0 = 0;
 458         u32 int_vec_map1 = 0;
 459         int ret = -ENODEV;
 460         int index = 0;
 461         u32 flags = 0;
 462
 463         intr->number_of_vectors = 0;
 464
 465         /* Try to set up MSIX interrupts */
 466         memset(&msix_entries[0], 0,
 467                sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
 468         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
 469                 msix_entries[index].entry = index;
 470         ret = pci_enable_msix_range(adapter->pdev,
 471                                     msix_entries, 1,
 472                                     1 + LAN743X_USED_TX_CHANNELS +
 473                                     LAN743X_USED_RX_CHANNELS);
 474
 475         if (ret > 0) {
 476                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 477                 intr->number_of_vectors = ret;
 478                 intr->using_vectors = true;
 479                 for (index = 0; index < intr->number_of_vectors; index++)
 480                         intr->vector_list[index].irq = msix_entries
 481                                                        [index].vector;
 482                 netif_info(adapter, ifup, adapter->netdev,
 483                            "using MSIX interrupts, number of vectors = %d\n",
 484                            intr->number_of_vectors);
 485         }
 486
 487         /* If MSIX failed try to setup using MSI interrupts */
 488         if (!intr->number_of_vectors) {
 489                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 490                         if (!pci_enable_msi(adapter->pdev)) {
 491                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 492                                 intr->number_of_vectors = 1;
 493                                 intr->using_vectors = true;
 494                                 intr->vector_list[0].irq =
 495                                         adapter->pdev->irq;
 496                                 netif_info(adapter, ifup, adapter->netdev,
 497                                            "using MSI interrupts, number of vectors = %d\n",
 498                                            intr->number_of_vectors);
 499                         }
 500                 }
 501         }
 502
 503         /* If MSIX, and MSI failed, setup using legacy interrupt */
 504         if (!intr->number_of_vectors) {
 505                 intr->number_of_vectors = 1;
 506                 intr->using_vectors = false;
 507                 intr->vector_list[0].irq = intr->irq;
 508                 netif_info(adapter, ifup, adapter->netdev,
 509                            "using legacy interrupts\n");
 510         }
 511
 512         /* At this point we must have at least one irq */
 513         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 514
 515         /* map all interrupts to vector 0 */
 516         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 517         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 518         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 519         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 520                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 521                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 522                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 523
 524         if (intr->using_vectors) {
 525                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 526                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 527         } else {
 528                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 529                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 530                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 531         }
 532
 533         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 534                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 535                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 536                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 537                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 538                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 539                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 540         }
 541
 542         ret = lan743x_intr_register_isr(adapter, 0, flags,
 543                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 544                                         INT_BIT_ALL_OTHER_,
 545                                         lan743x_intr_shared_isr, adapter);
 546         if (ret)
 547                 goto clean_up;
 548         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 549
 550         if (intr->using_vectors)
 551                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 552                                   INT_VEC_EN_(0));
 553
 554         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 555                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 556                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 557                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 558                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 559                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 560                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 561                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 562                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 563                 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 564                 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 565                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 566         }
 567
 568         /* enable interrupts */
 569         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 570         ret = lan743x_intr_test_isr(adapter);
 571         if (ret)
 572                 goto clean_up;
 573
 574         if (intr->number_of_vectors > 1) {
 575                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 576
 577                 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
 578                         number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
 579                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 580                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 581                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 582                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 583                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 584                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 585
 586                 if (adapter->csr.flags &
 587                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 588                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 589                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 590                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 591                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 592                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 593                 }
 594
 595                 for (index = 0; index < number_of_tx_vectors; index++) {
 596                         u32 int_bit = INT_BIT_DMA_TX_(index);
 597                         int vector = index + 1;
 598
 599                         /* map TX interrupt to vector */
 600                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 601                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 602                         if (flags &
 603                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 604                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 605                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 606                                                   int_vec_en_auto_clr);
 607                         }
 608
 609                         /* Remove TX interrupt from shared mask */
 610                         intr->vector_list[0].int_mask &= ~int_bit;
 611                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 612                                                         int_bit, lan743x_tx_isr,
 613                                                         &adapter->tx[index]);
 614                         if (ret)
 615                                 goto clean_up;
 616                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 617                         if (!(flags &
 618                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 619                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 620                                                   INT_VEC_EN_(vector));
 621                 }
 622         }
 623         if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
 624                 int number_of_rx_vectors = intr->number_of_vectors -
 625                                            LAN743X_USED_TX_CHANNELS - 1;
 626
 627                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 628                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 629
 630                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 631                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 632                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 633                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 634                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 635                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 636
 637                 if (adapter->csr.flags &
 638                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 639                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 640                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 641                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 642                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 643                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 644                 }
 645                 for (index = 0; index < number_of_rx_vectors; index++) {
 646                         int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
 647                         u32 int_bit = INT_BIT_DMA_RX_(index);
 648
 649                         /* map RX interrupt to vector */
 650                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 651                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 652                         if (flags &
 653                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 654                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 655                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 656                                                   int_vec_en_auto_clr);
 657                         }
 658
 659                         /* Remove RX interrupt from shared mask */
 660                         intr->vector_list[0].int_mask &= ~int_bit;
 661                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 662                                                         int_bit, lan743x_rx_isr,
 663                                                         &adapter->rx[index]);
 664                         if (ret)
 665                                 goto clean_up;
 666                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 667
 668                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 669                                           INT_VEC_EN_(vector));
 670                 }
 671         }
 672         return 0;
 673
 674 clean_up:
 675         lan743x_intr_close(adapter);
 676         return ret;
 677 }
 678
 679 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 680                             u32 select, u32 addr, u32 length, u32 *buf)
 681 {
 682         int ret = -EIO;
 683         u32 dp_sel;
 684         int i;
 685
 686         mutex_lock(&adapter->dp_lock);
 687         if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 688                                      1, 40, 100, 100))
 689                 goto unlock;
 690         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 691         dp_sel &= ~DP_SEL_MASK_;
 692         dp_sel |= select;
 693         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 694
 695         for (i = 0; i < length; i++) {
 696                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 697                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 698                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 699                 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 700                                              1, 40, 100, 100))
 701                         goto unlock;
 702         }
 703         ret = 0;
 704
 705 unlock:
 706         mutex_unlock(&adapter->dp_lock);
 707         return ret;
 708 }
 709
 710 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 711 {
 712         u32 ret;
 713
 714         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 715                 MAC_MII_ACC_PHY_ADDR_MASK_;
 716         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 717                 MAC_MII_ACC_MIIRINDA_MASK_;
 718
 719         if (read)
 720                 ret |= MAC_MII_ACC_MII_READ_;
 721         else
 722                 ret |= MAC_MII_ACC_MII_WRITE_;
 723         ret |= MAC_MII_ACC_MII_BUSY_;
 724
 725         return ret;
 726 }
 727
 728 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 729 {
 730         u32 data;
 731
 732         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 733                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 734 }
 735
 736 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 737 {
 738         struct lan743x_adapter *adapter = bus->priv;
 739         u32 val, mii_access;
 740         int ret;
 741
 742         /* comfirm MII not busy */
 743         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 744         if (ret < 0)
 745                 return ret;
 746
 747         /* set the address, index & direction (read from PHY) */
 748         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 749         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 750         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 751         if (ret < 0)
 752                 return ret;
 753
 754         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 755         return (int)(val & 0xFFFF);
 756 }
 757
 758 static int lan743x_mdiobus_write(struct mii_bus *bus,
 759                                  int phy_id, int index, u16 regval)
 760 {
 761         struct lan743x_adapter *adapter = bus->priv;
 762         u32 val, mii_access;
 763         int ret;
 764
 765         /* confirm MII not busy */
 766         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 767         if (ret < 0)
 768                 return ret;
 769         val = (u32)regval;
 770         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 771
 772         /* set the address, index & direction (write to PHY) */
 773         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 774         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 775         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 776         return ret;
 777 }
 778
 779 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 780                                     u8 *addr)
 781 {
 782         u32 addr_lo, addr_hi;
 783
 784         addr_lo = addr[0] |
 785                 addr[1] << 8 |
 786                 addr[2] << 16 |
 787                 addr[3] << 24;
 788         addr_hi = addr[4] |
 789                 addr[5] << 8;
 790         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 791         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 792
 793         ether_addr_copy(adapter->mac_address, addr);
 794         netif_info(adapter, drv, adapter->netdev,
 795                    "MAC address set to %pM\n", addr);
 796 }
 797
 798 static int lan743x_mac_init(struct lan743x_adapter *adapter)
 799 {
 800         bool mac_address_valid = true;
 801         struct net_device *netdev;
 802         u32 mac_addr_hi = 0;
 803         u32 mac_addr_lo = 0;
 804         u32 data;
 805         int ret;
 806
 807         netdev = adapter->netdev;
 808         lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
 809         ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
 810                                        0, 1000, 20000, 100);
 811         if (ret)
 812                 return ret;
 813
 814         /* setup auto duplex, and speed detection */
 815         data = lan743x_csr_read(adapter, MAC_CR);
 816         data |= MAC_CR_ADD_ | MAC_CR_ASD_;
 817         data |= MAC_CR_CNTR_RST_;
 818         lan743x_csr_write(adapter, MAC_CR, data);
 819
 820         mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 821         mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 822         adapter->mac_address[0] = mac_addr_lo & 0xFF;
 823         adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 824         adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 825         adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 826         adapter->mac_address[4] = mac_addr_hi & 0xFF;
 827         adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 828
 829         if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 830             mac_addr_lo == 0xFFFFFFFF) {
 831                 mac_address_valid = false;
 832         } else if (!is_valid_ether_addr(adapter->mac_address)) {
 833                 mac_address_valid = false;
 834         }
 835
 836         if (!mac_address_valid)
 837                 eth_random_addr(adapter->mac_address);
 838         lan743x_mac_set_address(adapter, adapter->mac_address);
 839         ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 840         return 0;
 841 }
 842
 843 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 844 {
 845         int ret = 0;
 846         u32 temp;
 847
 848         temp = lan743x_csr_read(adapter, MAC_RX);
 849         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 850         temp = lan743x_csr_read(adapter, MAC_TX);
 851         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 852         return ret;
 853 }
 854
 855 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 856 {
 857         u32 temp;
 858
 859         temp = lan743x_csr_read(adapter, MAC_TX);
 860         temp &= ~MAC_TX_TXEN_;
 861         lan743x_csr_write(adapter, MAC_TX, temp);
 862         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 863                                  1, 1000, 20000, 100);
 864
 865         temp = lan743x_csr_read(adapter, MAC_RX);
 866         temp &= ~MAC_RX_RXEN_;
 867         lan743x_csr_write(adapter, MAC_RX, temp);
 868         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 869                                  1, 1000, 20000, 100);
 870 }
 871
 872 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 873                                               bool tx_enable, bool rx_enable)
 874 {
 875         u32 flow_setting = 0;
 876
 877         /* set maximum pause time because when fifo space frees
 878          * up a zero value pause frame will be sent to release the pause
 879          */
 880         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 881         if (tx_enable)
 882                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 883         if (rx_enable)
 884                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 885         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 886 }
 887
 888 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 889 {
 890         int enabled = 0;
 891         u32 mac_rx = 0;
 892
 893         mac_rx = lan743x_csr_read(adapter, MAC_RX);
 894         if (mac_rx & MAC_RX_RXEN_) {
 895                 enabled = 1;
 896                 if (mac_rx & MAC_RX_RXD_) {
 897                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 898                         mac_rx &= ~MAC_RX_RXD_;
 899                 }
 900                 mac_rx &= ~MAC_RX_RXEN_;
 901                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 902                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 903                                          1, 1000, 20000, 100);
 904                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 905         }
 906
 907         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 908         mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
 909                   MAC_RX_MAX_SIZE_MASK_);
 910         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 911
 912         if (enabled) {
 913                 mac_rx |= MAC_RX_RXEN_;
 914                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 915         }
 916         return 0;
 917 }
 918
 919 /* PHY */
 920 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 921 {
 922         u32 data;
 923
 924         /* Only called with in probe, and before mdiobus_register */
 925
 926         data = lan743x_csr_read(adapter, PMT_CTL);
 927         data |= PMT_CTL_ETH_PHY_RST_;
 928         lan743x_csr_write(adapter, PMT_CTL, data);
 929
 930         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 931                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
 932                                   (data & PMT_CTL_READY_)),
 933                                   50000, 1000000);
 934 }
 935
 936 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 937                                            u8 duplex, u16 local_adv,
 938                                            u16 remote_adv)
 939 {
 940         struct lan743x_phy *phy = &adapter->phy;
 941         u8 cap;
 942
 943         if (phy->fc_autoneg)
 944                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 945         else
 946                 cap = phy->fc_request_control;
 947
 948         lan743x_mac_flow_ctrl_set_enables(adapter,
 949                                           cap & FLOW_CTRL_TX,
 950                                           cap & FLOW_CTRL_RX);
 951 }
 952
 953 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 954 {
 955         return lan743x_phy_reset(adapter);
 956 }
 957
 958 static void lan743x_phy_link_status_change(struct net_device *netdev)
 959 {
 960         struct lan743x_adapter *adapter = netdev_priv(netdev);
 961         struct phy_device *phydev = netdev->phydev;
 962
 963         phy_print_status(phydev);
 964         if (phydev->state == PHY_RUNNING) {
 965                 struct ethtool_link_ksettings ksettings;
 966                 int remote_advertisement = 0;
 967                 int local_advertisement = 0;
 968
 969                 memset(&ksettings, 0, sizeof(ksettings));
 970                 phy_ethtool_get_link_ksettings(netdev, &ksettings);
 971                 local_advertisement = phy_read(phydev, MII_ADVERTISE);
 972                 if (local_advertisement < 0)
 973                         return;
 974
 975                 remote_advertisement = phy_read(phydev, MII_LPA);
 976                 if (remote_advertisement < 0)
 977                         return;
 978
 979                 lan743x_phy_update_flowcontrol(adapter,
 980                                                ksettings.base.duplex,
 981                                                local_advertisement,
 982                                                remote_advertisement);
 983                 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
 984         }
 985 }
 986
 987 static void lan743x_phy_close(struct lan743x_adapter *adapter)
 988 {
 989         struct net_device *netdev = adapter->netdev;
 990
 991         phy_stop(netdev->phydev);
 992         phy_disconnect(netdev->phydev);
 993         netdev->phydev = NULL;
 994 }
 995
 996 static int lan743x_phy_open(struct lan743x_adapter *adapter)
 997 {
 998         struct lan743x_phy *phy = &adapter->phy;
 999         struct phy_device *phydev;
1000         struct net_device *netdev;
1001         int ret = -EIO;
1002         u32 mii_adv;
1003
1004         netdev = adapter->netdev;
1005         phydev = phy_find_first(adapter->mdiobus);
1006         if (!phydev)
1007                 goto return_error;
1008
1009         ret = phy_connect_direct(netdev, phydev,
1010                                  lan743x_phy_link_status_change,
1011                                  PHY_INTERFACE_MODE_GMII);
1012         if (ret)
1013                 goto return_error;
1014
1015         /* MAC doesn't support 1000T Half */
1016         phydev->supported &= ~SUPPORTED_1000baseT_Half;
1017
1018         /* support both flow controls */
1019         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1020         phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1021         mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
1022         phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
1023         phy->fc_autoneg = phydev->autoneg;
1024
1025         phy_start(phydev);
1026         phy_start_aneg(phydev);
1027         return 0;
1028
1029 return_error:
1030         return ret;
1031 }
1032
1033 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1034 {
1035         lan743x_csr_write(adapter, RFE_RSS_CFG,
1036                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1037                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1038                 RFE_RSS_CFG_IPV6_EX_ |
1039                 RFE_RSS_CFG_UDP_IPV6_ |
1040                 RFE_RSS_CFG_TCP_IPV6_ |
1041                 RFE_RSS_CFG_IPV6_ |
1042                 RFE_RSS_CFG_UDP_IPV4_ |
1043                 RFE_RSS_CFG_TCP_IPV4_ |
1044                 RFE_RSS_CFG_IPV4_ |
1045                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1046                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1047                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1048                 RFE_RSS_CFG_RSS_ENABLE_);
1049 }
1050
1051 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1052 {
1053         u8 *mac_addr;
1054         u32 mac_addr_hi = 0;
1055         u32 mac_addr_lo = 0;
1056
1057         /* Add mac address to perfect Filter */
1058         mac_addr = adapter->mac_address;
1059         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1060                       (((u32)(mac_addr[1])) << 8) |
1061                       (((u32)(mac_addr[2])) << 16) |
1062                       (((u32)(mac_addr[3])) << 24));
1063         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1064                       (((u32)(mac_addr[5])) << 8));
1065
1066         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1067         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1068                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1069 }
1070
1071 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1072 {
1073         struct net_device *netdev = adapter->netdev;
1074         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1075         u32 rfctl;
1076         u32 data;
1077
1078         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1079         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1080                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1081         rfctl |= RFE_CTL_AB_;
1082         if (netdev->flags & IFF_PROMISC) {
1083                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1084         } else {
1085                 if (netdev->flags & IFF_ALLMULTI)
1086                         rfctl |= RFE_CTL_AM_;
1087         }
1088
1089         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1090         if (netdev_mc_count(netdev)) {
1091                 struct netdev_hw_addr *ha;
1092                 int i;
1093
1094                 rfctl |= RFE_CTL_DA_PERFECT_;
1095                 i = 1;
1096                 netdev_for_each_mc_addr(ha, netdev) {
1097                         /* set first 32 into Perfect Filter */
1098                         if (i < 33) {
1099                                 lan743x_csr_write(adapter,
1100                                                   RFE_ADDR_FILT_HI(i), 0);
1101                                 data = ha->addr[3];
1102                                 data = ha->addr[2] | (data << 8);
1103                                 data = ha->addr[1] | (data << 8);
1104                                 data = ha->addr[0] | (data << 8);
1105                                 lan743x_csr_write(adapter,
1106                                                   RFE_ADDR_FILT_LO(i), data);
1107                                 data = ha->addr[5];
1108                                 data = ha->addr[4] | (data << 8);
1109                                 data |= RFE_ADDR_FILT_HI_VALID_;
1110                                 lan743x_csr_write(adapter,
1111                                                   RFE_ADDR_FILT_HI(i), data);
1112                         } else {
1113                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1114                                              23) & 0x1FF;
1115                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1116                                 rfctl |= RFE_CTL_MCAST_HASH_;
1117                         }
1118                         i++;
1119                 }
1120         }
1121
1122         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1123                          DP_SEL_VHF_VLAN_LEN,
1124                          DP_SEL_VHF_HASH_LEN, hash_table);
1125         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1126 }
1127
1128 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1129 {
1130         u32 data = 0;
1131
1132         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1133         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1134                                  0, 1000, 20000, 100);
1135         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1136         case DMA_DESCRIPTOR_SPACING_16:
1137                 data = DMAC_CFG_MAX_DSPACE_16_;
1138                 break;
1139         case DMA_DESCRIPTOR_SPACING_32:
1140                 data = DMAC_CFG_MAX_DSPACE_32_;
1141                 break;
1142         case DMA_DESCRIPTOR_SPACING_64:
1143                 data = DMAC_CFG_MAX_DSPACE_64_;
1144                 break;
1145         case DMA_DESCRIPTOR_SPACING_128:
1146                 data = DMAC_CFG_MAX_DSPACE_128_;
1147                 break;
1148         default:
1149                 return -EPERM;
1150         }
1151         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1152                 data |= DMAC_CFG_COAL_EN_;
1153         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1154         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1155         lan743x_csr_write(adapter, DMAC_CFG, data);
1156         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1157         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1158         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1159         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1160         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1161         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1162         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1163         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1164         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1165         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1166         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1167         return 0;
1168 }
1169
1170 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1171                                      int tx_channel)
1172 {
1173         u32 dmac_cmd = 0;
1174
1175         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1176         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1177                                       DMAC_CMD_START_T_(tx_channel)),
1178                                       (dmac_cmd &
1179                                       DMAC_CMD_STOP_T_(tx_channel)));
1180 }
1181
1182 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1183                                              int tx_channel)
1184 {
1185         int timeout = 100;
1186         int result = 0;
1187
1188         while (timeout &&
1189                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1190                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1191                 usleep_range(1000, 20000);
1192                 timeout--;
1193         }
1194         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1195                 result = -ENODEV;
1196         return result;
1197 }
1198
1199 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1200                                      int rx_channel)
1201 {
1202         u32 dmac_cmd = 0;
1203
1204         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1205         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1206                                       DMAC_CMD_START_R_(rx_channel)),
1207                                       (dmac_cmd &
1208                                       DMAC_CMD_STOP_R_(rx_channel)));
1209 }
1210
1211 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1212                                              int rx_channel)
1213 {
1214         int timeout = 100;
1215         int result = 0;
1216
1217         while (timeout &&
1218                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1219                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1220                 usleep_range(1000, 20000);
1221                 timeout--;
1222         }
1223         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1224                 result = -ENODEV;
1225         return result;
1226 }
1227
1228 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1229                                     int descriptor_index, bool cleanup)
1230 {
1231         struct lan743x_tx_buffer_info *buffer_info = NULL;
1232         struct lan743x_tx_descriptor *descriptor = NULL;
1233         u32 descriptor_type = 0;
1234         bool ignore_sync;
1235
1236         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1237         buffer_info = &tx->buffer_info[descriptor_index];
1238         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1239                 goto done;
1240
1241         descriptor_type = (descriptor->data0) &
1242                           TX_DESC_DATA0_DTYPE_MASK_;
1243         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1244                 goto clean_up_data_descriptor;
1245         else
1246                 goto clear_active;
1247
1248 clean_up_data_descriptor:
1249         if (buffer_info->dma_ptr) {
1250                 if (buffer_info->flags &
1251                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1252                         dma_unmap_page(&tx->adapter->pdev->dev,
1253                                        buffer_info->dma_ptr,
1254                                        buffer_info->buffer_length,
1255                                        DMA_TO_DEVICE);
1256                 } else {
1257                         dma_unmap_single(&tx->adapter->pdev->dev,
1258                                          buffer_info->dma_ptr,
1259                                          buffer_info->buffer_length,
1260                                          DMA_TO_DEVICE);
1261                 }
1262                 buffer_info->dma_ptr = 0;
1263                 buffer_info->buffer_length = 0;
1264         }
1265         if (!buffer_info->skb)
1266                 goto clear_active;
1267
1268         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1269                 dev_kfree_skb(buffer_info->skb);
1270                 goto clear_skb;
1271         }
1272
1273         if (cleanup) {
1274                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1275                 dev_kfree_skb(buffer_info->skb);
1276         } else {
1277                 ignore_sync = (buffer_info->flags &
1278                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1279                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1280                                              buffer_info->skb, ignore_sync);
1281         }
1282
1283 clear_skb:
1284         buffer_info->skb = NULL;
1285
1286 clear_active:
1287         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1288
1289 done:
1290         memset(buffer_info, 0, sizeof(*buffer_info));
1291         memset(descriptor, 0, sizeof(*descriptor));
1292 }
1293
1294 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1295 {
1296         return ((++index) % tx->ring_size);
1297 }
1298
1299 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1300 {
1301         while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1302                 lan743x_tx_release_desc(tx, tx->last_head, false);
1303                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1304         }
1305 }
1306
1307 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1308 {
1309         u32 original_head = 0;
1310
1311         original_head = tx->last_head;
1312         do {
1313                 lan743x_tx_release_desc(tx, tx->last_head, true);
1314                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1315         } while (tx->last_head != original_head);
1316         memset(tx->ring_cpu_ptr, 0,
1317                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1318         memset(tx->buffer_info, 0,
1319                sizeof(*tx->buffer_info) * (tx->ring_size));
1320 }
1321
1322 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1323                                    struct sk_buff *skb)
1324 {
1325         int result = 1; /* 1 for the main skb buffer */
1326         int nr_frags = 0;
1327
1328         if (skb_is_gso(skb))
1329                 result++; /* requires an extension descriptor */
1330         nr_frags = skb_shinfo(skb)->nr_frags;
1331         result += nr_frags; /* 1 for each fragment buffer */
1332         return result;
1333 }
1334
1335 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1336 {
1337         int last_head = tx->last_head;
1338         int last_tail = tx->last_tail;
1339
1340         if (last_tail >= last_head)
1341                 return tx->ring_size - last_tail + last_head - 1;
1342         else
1343                 return last_head - last_tail - 1;
1344 }
1345
1346 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1347                                       bool enable_timestamping,
1348                                       bool enable_onestep_sync)
1349 {
1350         if (enable_timestamping)
1351                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1352         else
1353                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1354         if (enable_onestep_sync)
1355                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1356         else
1357                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1358 }
1359
1360 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1361                                   unsigned char *first_buffer,
1362                                   unsigned int first_buffer_length,
1363                                   unsigned int frame_length,
1364                                   bool time_stamp,
1365                                   bool check_sum)
1366 {
1367         /* called only from within lan743x_tx_xmit_frame.
1368          * assuming tx->ring_lock has already been acquired.
1369          */
1370         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1371         struct lan743x_tx_buffer_info *buffer_info = NULL;
1372         struct lan743x_adapter *adapter = tx->adapter;
1373         struct device *dev = &adapter->pdev->dev;
1374         dma_addr_t dma_ptr;
1375
1376         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1377         tx->frame_first = tx->last_tail;
1378         tx->frame_tail = tx->frame_first;
1379
1380         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1381         buffer_info = &tx->buffer_info[tx->frame_tail];
1382         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1383                                  DMA_TO_DEVICE);
1384         if (dma_mapping_error(dev, dma_ptr))
1385                 return -ENOMEM;
1386
1387         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1388         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1389         tx_descriptor->data3 = (frame_length << 16) &
1390                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1391
1392         buffer_info->skb = NULL;
1393         buffer_info->dma_ptr = dma_ptr;
1394         buffer_info->buffer_length = first_buffer_length;
1395         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1396
1397         tx->frame_data0 = (first_buffer_length &
1398                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1399                 TX_DESC_DATA0_DTYPE_DATA_ |
1400                 TX_DESC_DATA0_FS_ |
1401                 TX_DESC_DATA0_FCS_;
1402         if (time_stamp)
1403                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1404
1405         if (check_sum)
1406                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1407                                    TX_DESC_DATA0_IPE_ |
1408                                    TX_DESC_DATA0_TPE_;
1409
1410         /* data0 will be programmed in one of other frame assembler functions */
1411         return 0;
1412 }
1413
1414 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1415                                      unsigned int frame_length)
1416 {
1417         /* called only from within lan743x_tx_xmit_frame.
1418          * assuming tx->ring_lock has already been acquired.
1419          */
1420         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1421         struct lan743x_tx_buffer_info *buffer_info = NULL;
1422
1423         /* wrap up previous descriptor */
1424         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1425         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1426         tx_descriptor->data0 = tx->frame_data0;
1427
1428         /* move to next descriptor */
1429         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1430         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1431         buffer_info = &tx->buffer_info[tx->frame_tail];
1432
1433         /* add extension descriptor */
1434         tx_descriptor->data1 = 0;
1435         tx_descriptor->data2 = 0;
1436         tx_descriptor->data3 = 0;
1437
1438         buffer_info->skb = NULL;
1439         buffer_info->dma_ptr = 0;
1440         buffer_info->buffer_length = 0;
1441         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1442
1443         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1444                           TX_DESC_DATA0_DTYPE_EXT_ |
1445                           TX_DESC_DATA0_EXT_LSO_;
1446
1447         /* data0 will be programmed in one of other frame assembler functions */
1448 }
1449
1450 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1451                                          const struct skb_frag_struct *fragment,
1452                                          unsigned int frame_length)
1453 {
1454         /* called only from within lan743x_tx_xmit_frame
1455          * assuming tx->ring_lock has already been acquired
1456          */
1457         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1458         struct lan743x_tx_buffer_info *buffer_info = NULL;
1459         struct lan743x_adapter *adapter = tx->adapter;
1460         struct device *dev = &adapter->pdev->dev;
1461         unsigned int fragment_length = 0;
1462         dma_addr_t dma_ptr;
1463
1464         fragment_length = skb_frag_size(fragment);
1465         if (!fragment_length)
1466                 return 0;
1467
1468         /* wrap up previous descriptor */
1469         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1470         tx_descriptor->data0 = tx->frame_data0;
1471
1472         /* move to next descriptor */
1473         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1474         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1475         buffer_info = &tx->buffer_info[tx->frame_tail];
1476         dma_ptr = skb_frag_dma_map(dev, fragment,
1477                                    0, fragment_length,
1478                                    DMA_TO_DEVICE);
1479         if (dma_mapping_error(dev, dma_ptr)) {
1480                 int desc_index;
1481
1482                 /* cleanup all previously setup descriptors */
1483                 desc_index = tx->frame_first;
1484                 while (desc_index != tx->frame_tail) {
1485                         lan743x_tx_release_desc(tx, desc_index, true);
1486                         desc_index = lan743x_tx_next_index(tx, desc_index);
1487                 }
1488                 dma_wmb();
1489                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1490                 tx->frame_first = 0;
1491                 tx->frame_data0 = 0;
1492                 tx->frame_tail = 0;
1493                 return -ENOMEM;
1494         }
1495
1496         tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1497         tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1498         tx_descriptor->data3 = (frame_length << 16) &
1499                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1500
1501         buffer_info->skb = NULL;
1502         buffer_info->dma_ptr = dma_ptr;
1503         buffer_info->buffer_length = fragment_length;
1504         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1505         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1506
1507         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1508                           TX_DESC_DATA0_DTYPE_DATA_ |
1509                           TX_DESC_DATA0_FCS_;
1510
1511         /* data0 will be programmed in one of other frame assembler functions */
1512         return 0;
1513 }
1514
1515 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1516                                  struct sk_buff *skb,
1517                                  bool time_stamp,
1518                                  bool ignore_sync)
1519 {
1520         /* called only from within lan743x_tx_xmit_frame
1521          * assuming tx->ring_lock has already been acquired
1522          */
1523         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1524         struct lan743x_tx_buffer_info *buffer_info = NULL;
1525         struct lan743x_adapter *adapter = tx->adapter;
1526         u32 tx_tail_flags = 0;
1527
1528         /* wrap up previous descriptor */
1529         tx->frame_data0 |= TX_DESC_DATA0_LS_;
1530         tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1531
1532         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1533         buffer_info = &tx->buffer_info[tx->frame_tail];
1534         buffer_info->skb = skb;
1535         if (time_stamp)
1536                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1537         if (ignore_sync)
1538                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1539
1540         tx_descriptor->data0 = tx->frame_data0;
1541         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1542         tx->last_tail = tx->frame_tail;
1543
1544         dma_wmb();
1545
1546         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1547                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1548         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1549                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1550                 TX_TAIL_SET_TOP_INT_EN_;
1551
1552         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1553                           tx_tail_flags | tx->frame_tail);
1554         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1555 }
1556
1557 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1558                                          struct sk_buff *skb)
1559 {
1560         int required_number_of_descriptors = 0;
1561         unsigned int start_frame_length = 0;
1562         unsigned int frame_length = 0;
1563         unsigned int head_length = 0;
1564         unsigned long irq_flags = 0;
1565         bool do_timestamp = false;
1566         bool ignore_sync = false;
1567         int nr_frags = 0;
1568         bool gso = false;
1569         int j;
1570
1571         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1572
1573         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1574         if (required_number_of_descriptors >
1575                 lan743x_tx_get_avail_desc(tx)) {
1576                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1577                         dev_kfree_skb(skb);
1578                 } else {
1579                         /* save to overflow buffer */
1580                         tx->overflow_skb = skb;
1581                         netif_stop_queue(tx->adapter->netdev);
1582                 }
1583                 goto unlock;
1584         }
1585
1586         /* space available, transmit skb  */
1587         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1588             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1589             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1590                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1591                 do_timestamp = true;
1592                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1593                         ignore_sync = true;
1594         }
1595         head_length = skb_headlen(skb);
1596         frame_length = skb_pagelen(skb);
1597         nr_frags = skb_shinfo(skb)->nr_frags;
1598         start_frame_length = frame_length;
1599         gso = skb_is_gso(skb);
1600         if (gso) {
1601                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1602                                          (unsigned short)8);
1603         }
1604
1605         if (lan743x_tx_frame_start(tx,
1606                                    skb->data, head_length,
1607                                    start_frame_length,
1608                                    do_timestamp,
1609                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1610                 dev_kfree_skb(skb);
1611                 goto unlock;
1612         }
1613
1614         if (gso)
1615                 lan743x_tx_frame_add_lso(tx, frame_length);
1616
1617         if (nr_frags <= 0)
1618                 goto finish;
1619
1620         for (j = 0; j < nr_frags; j++) {
1621                 const struct skb_frag_struct *frag;
1622
1623                 frag = &(skb_shinfo(skb)->frags[j]);
1624                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1625                         /* upon error no need to call
1626                          *      lan743x_tx_frame_end
1627                          * frame assembler clean up was performed inside
1628                          *      lan743x_tx_frame_add_fragment
1629                          */
1630                         dev_kfree_skb(skb);
1631                         goto unlock;
1632                 }
1633         }
1634
1635 finish:
1636         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1637
1638 unlock:
1639         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1640         return NETDEV_TX_OK;
1641 }
1642
1643 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1644 {
1645         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1646         struct lan743x_adapter *adapter = tx->adapter;
1647         bool start_transmitter = false;
1648         unsigned long irq_flags = 0;
1649         u32 ioc_bit = 0;
1650         u32 int_sts = 0;
1651
1652         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1653         int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1654         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1655                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1656         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1657
1658         /* clean up tx ring */
1659         lan743x_tx_release_completed_descriptors(tx);
1660         if (netif_queue_stopped(adapter->netdev)) {
1661                 if (tx->overflow_skb) {
1662                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1663                                 lan743x_tx_get_avail_desc(tx))
1664                                 start_transmitter = true;
1665                 } else {
1666                         netif_wake_queue(adapter->netdev);
1667                 }
1668         }
1669         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1670
1671         if (start_transmitter) {
1672                 /* space is now available, transmit overflow skb */
1673                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1674                 tx->overflow_skb = NULL;
1675                 netif_wake_queue(adapter->netdev);
1676         }
1677
1678         if (!napi_complete_done(napi, weight))
1679                 goto done;
1680
1681         /* enable isr */
1682         lan743x_csr_write(adapter, INT_EN_SET,
1683                           INT_BIT_DMA_TX_(tx->channel_number));
1684         lan743x_csr_read(adapter, INT_STS);
1685
1686 done:
1687         return weight;
1688 }
1689
1690 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1691 {
1692         if (tx->head_cpu_ptr) {
1693                 pci_free_consistent(tx->adapter->pdev,
1694                                     sizeof(*tx->head_cpu_ptr),
1695                                     (void *)(tx->head_cpu_ptr),
1696                                     tx->head_dma_ptr);
1697                 tx->head_cpu_ptr = NULL;
1698                 tx->head_dma_ptr = 0;
1699         }
1700         kfree(tx->buffer_info);
1701         tx->buffer_info = NULL;
1702
1703         if (tx->ring_cpu_ptr) {
1704                 pci_free_consistent(tx->adapter->pdev,
1705                                     tx->ring_allocation_size,
1706                                     tx->ring_cpu_ptr,
1707                                     tx->ring_dma_ptr);
1708                 tx->ring_allocation_size = 0;
1709                 tx->ring_cpu_ptr = NULL;
1710                 tx->ring_dma_ptr = 0;
1711         }
1712         tx->ring_size = 0;
1713 }
1714
1715 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1716 {
1717         size_t ring_allocation_size = 0;
1718         void *cpu_ptr = NULL;
1719         dma_addr_t dma_ptr;
1720         int ret = -ENOMEM;
1721
1722         tx->ring_size = LAN743X_TX_RING_SIZE;
1723         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1724                 ret = -EINVAL;
1725                 goto cleanup;
1726         }
1727         ring_allocation_size = ALIGN(tx->ring_size *
1728                                      sizeof(struct lan743x_tx_descriptor),
1729                                      PAGE_SIZE);
1730         dma_ptr = 0;
1731         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1732                                         ring_allocation_size, &dma_ptr);
1733         if (!cpu_ptr) {
1734                 ret = -ENOMEM;
1735                 goto cleanup;
1736         }
1737
1738         tx->ring_allocation_size = ring_allocation_size;
1739         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1740         tx->ring_dma_ptr = dma_ptr;
1741
1742         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1743         if (!cpu_ptr) {
1744                 ret = -ENOMEM;
1745                 goto cleanup;
1746         }
1747         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1748         dma_ptr = 0;
1749         cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1750                                         sizeof(*tx->head_cpu_ptr), &dma_ptr);
1751         if (!cpu_ptr) {
1752                 ret = -ENOMEM;
1753                 goto cleanup;
1754         }
1755
1756         tx->head_cpu_ptr = cpu_ptr;
1757         tx->head_dma_ptr = dma_ptr;
1758         if (tx->head_dma_ptr & 0x3) {
1759                 ret = -ENOMEM;
1760                 goto cleanup;
1761         }
1762
1763         return 0;
1764
1765 cleanup:
1766         lan743x_tx_ring_cleanup(tx);
1767         return ret;
1768 }
1769
1770 static void lan743x_tx_close(struct lan743x_tx *tx)
1771 {
1772         struct lan743x_adapter *adapter = tx->adapter;
1773
1774         lan743x_csr_write(adapter,
1775                           DMAC_CMD,
1776                           DMAC_CMD_STOP_T_(tx->channel_number));
1777         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1778
1779         lan743x_csr_write(adapter,
1780                           DMAC_INT_EN_CLR,
1781                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1782         lan743x_csr_write(adapter, INT_EN_CLR,
1783                           INT_BIT_DMA_TX_(tx->channel_number));
1784         napi_disable(&tx->napi);
1785         netif_napi_del(&tx->napi);
1786
1787         lan743x_csr_write(adapter, FCT_TX_CTL,
1788                           FCT_TX_CTL_DIS_(tx->channel_number));
1789         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1790                                  FCT_TX_CTL_EN_(tx->channel_number),
1791                                  0, 1000, 20000, 100);
1792
1793         lan743x_tx_release_all_descriptors(tx);
1794
1795         if (tx->overflow_skb) {
1796                 dev_kfree_skb(tx->overflow_skb);
1797                 tx->overflow_skb = NULL;
1798         }
1799
1800         lan743x_tx_ring_cleanup(tx);
1801 }
1802
1803 static int lan743x_tx_open(struct lan743x_tx *tx)
1804 {
1805         struct lan743x_adapter *adapter = NULL;
1806         u32 data = 0;
1807         int ret;
1808
1809         adapter = tx->adapter;
1810         ret = lan743x_tx_ring_init(tx);
1811         if (ret)
1812                 return ret;
1813
1814         /* initialize fifo */
1815         lan743x_csr_write(adapter, FCT_TX_CTL,
1816                           FCT_TX_CTL_RESET_(tx->channel_number));
1817         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1818                                  FCT_TX_CTL_RESET_(tx->channel_number),
1819                                  0, 1000, 20000, 100);
1820
1821         /* enable fifo */
1822         lan743x_csr_write(adapter, FCT_TX_CTL,
1823                           FCT_TX_CTL_EN_(tx->channel_number));
1824
1825         /* reset tx channel */
1826         lan743x_csr_write(adapter, DMAC_CMD,
1827                           DMAC_CMD_TX_SWR_(tx->channel_number));
1828         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1829                                  DMAC_CMD_TX_SWR_(tx->channel_number),
1830                                  0, 1000, 20000, 100);
1831
1832         /* Write TX_BASE_ADDR */
1833         lan743x_csr_write(adapter,
1834                           TX_BASE_ADDRH(tx->channel_number),
1835                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1836         lan743x_csr_write(adapter,
1837                           TX_BASE_ADDRL(tx->channel_number),
1838                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
1839
1840         /* Write TX_CFG_B */
1841         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1842         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1843         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1844         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1845                 data |= TX_CFG_B_TDMABL_512_;
1846         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1847
1848         /* Write TX_CFG_A */
1849         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1850         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1851                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1852                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1853                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1854                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1855         }
1856         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1857
1858         /* Write TX_HEAD_WRITEBACK_ADDR */
1859         lan743x_csr_write(adapter,
1860                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1861                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
1862         lan743x_csr_write(adapter,
1863                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1864                           DMA_ADDR_LOW32(tx->head_dma_ptr));
1865
1866         /* set last head */
1867         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1868
1869         /* write TX_TAIL */
1870         tx->last_tail = 0;
1871         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1872                           (u32)(tx->last_tail));
1873         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1874                                                          INT_BIT_DMA_TX_
1875                                                          (tx->channel_number));
1876         netif_napi_add(adapter->netdev,
1877                        &tx->napi, lan743x_tx_napi_poll,
1878                        tx->ring_size - 1);
1879         napi_enable(&tx->napi);
1880
1881         data = 0;
1882         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1883                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1884         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1885                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1886         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1887                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1888         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1889                 data |= TX_CFG_C_TX_INT_EN_R2C_;
1890         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1891
1892         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1893                 lan743x_csr_write(adapter, INT_EN_SET,
1894                                   INT_BIT_DMA_TX_(tx->channel_number));
1895         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1896                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1897
1898         /*  start dmac channel */
1899         lan743x_csr_write(adapter, DMAC_CMD,
1900                           DMAC_CMD_START_T_(tx->channel_number));
1901         return 0;
1902 }
1903
1904 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1905 {
1906         return ((++index) % rx->ring_size);
1907 }
1908
1909 static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1910 {
1911         struct lan743x_rx_buffer_info *buffer_info;
1912         struct lan743x_rx_descriptor *descriptor;
1913         int length = 0;
1914
1915         length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1916         descriptor = &rx->ring_cpu_ptr[index];
1917         buffer_info = &rx->buffer_info[index];
1918         buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1919                                               length,
1920                                               GFP_ATOMIC | GFP_DMA);
1921         if (!(buffer_info->skb))
1922                 return -ENOMEM;
1923         buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1924                                               buffer_info->skb->data,
1925                                               length,
1926                                               DMA_FROM_DEVICE);
1927         if (dma_mapping_error(&rx->adapter->pdev->dev,
1928                               buffer_info->dma_ptr)) {
1929                 buffer_info->dma_ptr = 0;
1930                 return -ENOMEM;
1931         }
1932
1933         buffer_info->buffer_length = length;
1934         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1935         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1936         descriptor->data3 = 0;
1937         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1938                             (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1939         skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1940
1941         return 0;
1942 }
1943
1944 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1945 {
1946         struct lan743x_rx_buffer_info *buffer_info;
1947         struct lan743x_rx_descriptor *descriptor;
1948
1949         descriptor = &rx->ring_cpu_ptr[index];
1950         buffer_info = &rx->buffer_info[index];
1951
1952         descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1953         descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1954         descriptor->data3 = 0;
1955         descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1956                             ((buffer_info->buffer_length) &
1957                             RX_DESC_DATA0_BUF_LENGTH_MASK_));
1958 }
1959
1960 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1961 {
1962         struct lan743x_rx_buffer_info *buffer_info;
1963         struct lan743x_rx_descriptor *descriptor;
1964
1965         descriptor = &rx->ring_cpu_ptr[index];
1966         buffer_info = &rx->buffer_info[index];
1967
1968         memset(descriptor, 0, sizeof(*descriptor));
1969
1970         if (buffer_info->dma_ptr) {
1971                 dma_unmap_single(&rx->adapter->pdev->dev,
1972                                  buffer_info->dma_ptr,
1973                                  buffer_info->buffer_length,
1974                                  DMA_FROM_DEVICE);
1975                 buffer_info->dma_ptr = 0;
1976         }
1977
1978         if (buffer_info->skb) {
1979                 dev_kfree_skb(buffer_info->skb);
1980                 buffer_info->skb = NULL;
1981         }
1982
1983         memset(buffer_info, 0, sizeof(*buffer_info));
1984 }
1985
1986 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1987 {
1988         struct skb_shared_hwtstamps *hwtstamps = NULL;
1989         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1990         struct lan743x_rx_buffer_info *buffer_info;
1991         struct lan743x_rx_descriptor *descriptor;
1992         int current_head_index = -1;
1993         int extension_index = -1;
1994         int first_index = -1;
1995         int last_index = -1;
1996
1997         current_head_index = *rx->head_cpu_ptr;
1998         if (current_head_index < 0 || current_head_index >= rx->ring_size)
1999                 goto done;
2000
2001         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2002                 goto done;
2003
2004         if (rx->last_head != current_head_index) {
2005                 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2006                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2007                         goto done;
2008
2009                 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
2010                         goto done;
2011
2012                 first_index = rx->last_head;
2013                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2014                         last_index = rx->last_head;
2015                 } else {
2016                         int index;
2017
2018                         index = lan743x_rx_next_index(rx, first_index);
2019                         while (index != current_head_index) {
2020                                 descriptor = &rx->ring_cpu_ptr[index];
2021                                 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2022                                         goto done;
2023
2024                                 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2025                                         last_index = index;
2026                                         break;
2027                                 }
2028                                 index = lan743x_rx_next_index(rx, index);
2029                         }
2030                 }
2031                 if (last_index >= 0) {
2032                         descriptor = &rx->ring_cpu_ptr[last_index];
2033                         if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2034                                 /* extension is expected to follow */
2035                                 int index = lan743x_rx_next_index(rx,
2036                                                                   last_index);
2037                                 if (index != current_head_index) {
2038                                         descriptor = &rx->ring_cpu_ptr[index];
2039                                         if (descriptor->data0 &
2040                                             RX_DESC_DATA0_OWN_) {
2041                                                 goto done;
2042                                         }
2043                                         if (descriptor->data0 &
2044                                             RX_DESC_DATA0_EXT_) {
2045                                                 extension_index = index;
2046                                         } else {
2047                                                 goto done;
2048                                         }
2049                                 } else {
2050                                         /* extension is not yet available */
2051                                         /* prevent processing of this packet */
2052                                         first_index = -1;
2053                                         last_index = -1;
2054                                 }
2055                         }
2056                 }
2057         }
2058         if (first_index >= 0 && last_index >= 0) {
2059                 int real_last_index = last_index;
2060                 struct sk_buff *skb = NULL;
2061                 u32 ts_sec = 0;
2062                 u32 ts_nsec = 0;
2063
2064                 /* packet is available */
2065                 if (first_index == last_index) {
2066                         /* single buffer packet */
2067                         int packet_length;
2068
2069                         buffer_info = &rx->buffer_info[first_index];
2070                         skb = buffer_info->skb;
2071                         descriptor = &rx->ring_cpu_ptr[first_index];
2072
2073                         /* unmap from dma */
2074                         if (buffer_info->dma_ptr) {
2075                                 dma_unmap_single(&rx->adapter->pdev->dev,
2076                                                  buffer_info->dma_ptr,
2077                                                  buffer_info->buffer_length,
2078                                                  DMA_FROM_DEVICE);
2079                                 buffer_info->dma_ptr = 0;
2080                                 buffer_info->buffer_length = 0;
2081                         }
2082                         buffer_info->skb = NULL;
2083                         packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2084                                         (descriptor->data0);
2085                         skb_put(skb, packet_length - 4);
2086                         skb->protocol = eth_type_trans(skb,
2087                                                        rx->adapter->netdev);
2088                         lan743x_rx_allocate_ring_element(rx, first_index);
2089                 } else {
2090                         int index = first_index;
2091
2092                         /* multi buffer packet not supported */
2093                         /* this should not happen since
2094                          * buffers are allocated to be at least jumbo size
2095                          */
2096
2097                         /* clean up buffers */
2098                         if (first_index <= last_index) {
2099                                 while ((index >= first_index) &&
2100                                        (index <= last_index)) {
2101                                         lan743x_rx_release_ring_element(rx,
2102                                                                         index);
2103                                         lan743x_rx_allocate_ring_element(rx,
2104                                                                          index);
2105                                         index = lan743x_rx_next_index(rx,
2106                                                                       index);
2107                                 }
2108                         } else {
2109                                 while ((index >= first_index) ||
2110                                        (index <= last_index)) {
2111                                         lan743x_rx_release_ring_element(rx,
2112                                                                         index);
2113                                         lan743x_rx_allocate_ring_element(rx,
2114                                                                          index);
2115                                         index = lan743x_rx_next_index(rx,
2116                                                                       index);
2117                                 }
2118                         }
2119                 }
2120
2121                 if (extension_index >= 0) {
2122                         descriptor = &rx->ring_cpu_ptr[extension_index];
2123                         buffer_info = &rx->buffer_info[extension_index];
2124
2125                         ts_sec = descriptor->data1;
2126                         ts_nsec = (descriptor->data2 &
2127                                   RX_DESC_DATA2_TS_NS_MASK_);
2128                         lan743x_rx_reuse_ring_element(rx, extension_index);
2129                         real_last_index = extension_index;
2130                 }
2131
2132                 if (!skb) {
2133                         result = RX_PROCESS_RESULT_PACKET_DROPPED;
2134                         goto move_forward;
2135                 }
2136
2137                 if (extension_index < 0)
2138                         goto pass_packet_to_os;
2139                 hwtstamps = skb_hwtstamps(skb);
2140                 if (hwtstamps)
2141                         hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2142
2143 pass_packet_to_os:
2144                 /* pass packet to OS */
2145                 napi_gro_receive(&rx->napi, skb);
2146                 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2147
2148 move_forward:
2149                 /* push tail and head forward */
2150                 rx->last_tail = real_last_index;
2151                 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2152         }
2153 done:
2154         return result;
2155 }
2156
2157 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2158 {
2159         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2160         struct lan743x_adapter *adapter = rx->adapter;
2161         u32 rx_tail_flags = 0;
2162         int count;
2163
2164         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2165                 /* clear int status bit before reading packet */
2166                 lan743x_csr_write(adapter, DMAC_INT_STS,
2167                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2168         }
2169         count = 0;
2170         while (count < weight) {
2171                 int rx_process_result = -1;
2172
2173                 rx_process_result = lan743x_rx_process_packet(rx);
2174                 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2175                         count++;
2176                 } else if (rx_process_result ==
2177                         RX_PROCESS_RESULT_NOTHING_TO_DO) {
2178                         break;
2179                 } else if (rx_process_result ==
2180                         RX_PROCESS_RESULT_PACKET_DROPPED) {
2181                         continue;
2182                 }
2183         }
2184         rx->frame_count += count;
2185         if (count == weight)
2186                 goto done;
2187
2188         if (!napi_complete_done(napi, count))
2189                 goto done;
2190
2191         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2192                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2193         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2194                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2195         } else {
2196                 lan743x_csr_write(adapter, INT_EN_SET,
2197                                   INT_BIT_DMA_RX_(rx->channel_number));
2198         }
2199
2200         /* update RX_TAIL */
2201         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2202                           rx_tail_flags | rx->last_tail);
2203 done:
2204         return count;
2205 }
2206
2207 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2208 {
2209         if (rx->buffer_info && rx->ring_cpu_ptr) {
2210                 int index;
2211
2212                 for (index = 0; index < rx->ring_size; index++)
2213                         lan743x_rx_release_ring_element(rx, index);
2214         }
2215
2216         if (rx->head_cpu_ptr) {
2217                 pci_free_consistent(rx->adapter->pdev,
2218                                     sizeof(*rx->head_cpu_ptr),
2219                                     rx->head_cpu_ptr,
2220                                     rx->head_dma_ptr);
2221                 rx->head_cpu_ptr = NULL;
2222                 rx->head_dma_ptr = 0;
2223         }
2224
2225         kfree(rx->buffer_info);
2226         rx->buffer_info = NULL;
2227
2228         if (rx->ring_cpu_ptr) {
2229                 pci_free_consistent(rx->adapter->pdev,
2230                                     rx->ring_allocation_size,
2231                                     rx->ring_cpu_ptr,
2232                                     rx->ring_dma_ptr);
2233                 rx->ring_allocation_size = 0;
2234                 rx->ring_cpu_ptr = NULL;
2235                 rx->ring_dma_ptr = 0;
2236         }
2237
2238         rx->ring_size = 0;
2239         rx->last_head = 0;
2240 }
2241
2242 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2243 {
2244         size_t ring_allocation_size = 0;
2245         dma_addr_t dma_ptr = 0;
2246         void *cpu_ptr = NULL;
2247         int ret = -ENOMEM;
2248         int index = 0;
2249
2250         rx->ring_size = LAN743X_RX_RING_SIZE;
2251         if (rx->ring_size <= 1) {
2252                 ret = -EINVAL;
2253                 goto cleanup;
2254         }
2255         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2256                 ret = -EINVAL;
2257                 goto cleanup;
2258         }
2259         ring_allocation_size = ALIGN(rx->ring_size *
2260                                      sizeof(struct lan743x_rx_descriptor),
2261                                      PAGE_SIZE);
2262         dma_ptr = 0;
2263         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2264                                         ring_allocation_size, &dma_ptr);
2265         if (!cpu_ptr) {
2266                 ret = -ENOMEM;
2267                 goto cleanup;
2268         }
2269         rx->ring_allocation_size = ring_allocation_size;
2270         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2271         rx->ring_dma_ptr = dma_ptr;
2272
2273         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2274                           GFP_KERNEL);
2275         if (!cpu_ptr) {
2276                 ret = -ENOMEM;
2277                 goto cleanup;
2278         }
2279         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2280         dma_ptr = 0;
2281         cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2282                                         sizeof(*rx->head_cpu_ptr), &dma_ptr);
2283         if (!cpu_ptr) {
2284                 ret = -ENOMEM;
2285                 goto cleanup;
2286         }
2287
2288         rx->head_cpu_ptr = cpu_ptr;
2289         rx->head_dma_ptr = dma_ptr;
2290         if (rx->head_dma_ptr & 0x3) {
2291                 ret = -ENOMEM;
2292                 goto cleanup;
2293         }
2294
2295         rx->last_head = 0;
2296         for (index = 0; index < rx->ring_size; index++) {
2297                 ret = lan743x_rx_allocate_ring_element(rx, index);
2298                 if (ret)
2299                         goto cleanup;
2300         }
2301         return 0;
2302
2303 cleanup:
2304         lan743x_rx_ring_cleanup(rx);
2305         return ret;
2306 }
2307
2308 static void lan743x_rx_close(struct lan743x_rx *rx)
2309 {
2310         struct lan743x_adapter *adapter = rx->adapter;
2311
2312         lan743x_csr_write(adapter, FCT_RX_CTL,
2313                           FCT_RX_CTL_DIS_(rx->channel_number));
2314         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2315                                  FCT_RX_CTL_EN_(rx->channel_number),
2316                                  0, 1000, 20000, 100);
2317
2318         lan743x_csr_write(adapter, DMAC_CMD,
2319                           DMAC_CMD_STOP_R_(rx->channel_number));
2320         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2321
2322         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2323                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2324         lan743x_csr_write(adapter, INT_EN_CLR,
2325                           INT_BIT_DMA_RX_(rx->channel_number));
2326         napi_disable(&rx->napi);
2327
2328         netif_napi_del(&rx->napi);
2329
2330         lan743x_rx_ring_cleanup(rx);
2331 }
2332
2333 static int lan743x_rx_open(struct lan743x_rx *rx)
2334 {
2335         struct lan743x_adapter *adapter = rx->adapter;
2336         u32 data = 0;
2337         int ret;
2338
2339         rx->frame_count = 0;
2340         ret = lan743x_rx_ring_init(rx);
2341         if (ret)
2342                 goto return_error;
2343
2344         netif_napi_add(adapter->netdev,
2345                        &rx->napi, lan743x_rx_napi_poll,
2346                        rx->ring_size - 1);
2347
2348         lan743x_csr_write(adapter, DMAC_CMD,
2349                           DMAC_CMD_RX_SWR_(rx->channel_number));
2350         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2351                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2352                                  0, 1000, 20000, 100);
2353
2354         /* set ring base address */
2355         lan743x_csr_write(adapter,
2356                           RX_BASE_ADDRH(rx->channel_number),
2357                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2358         lan743x_csr_write(adapter,
2359                           RX_BASE_ADDRL(rx->channel_number),
2360                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2361
2362         /* set rx write back address */
2363         lan743x_csr_write(adapter,
2364                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2365                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2366         lan743x_csr_write(adapter,
2367                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2368                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2369         data = RX_CFG_A_RX_HP_WB_EN_;
2370         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2371                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2372                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2373                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2374                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2375         }
2376
2377         /* set RX_CFG_A */
2378         lan743x_csr_write(adapter,
2379                           RX_CFG_A(rx->channel_number), data);
2380
2381         /* set RX_CFG_B */
2382         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2383         data &= ~RX_CFG_B_RX_PAD_MASK_;
2384         if (!RX_HEAD_PADDING)
2385                 data |= RX_CFG_B_RX_PAD_0_;
2386         else
2387                 data |= RX_CFG_B_RX_PAD_2_;
2388         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2389         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2390         data |= RX_CFG_B_TS_ALL_RX_;
2391         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2392                 data |= RX_CFG_B_RDMABL_512_;
2393
2394         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2395         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2396                                                          INT_BIT_DMA_RX_
2397                                                          (rx->channel_number));
2398
2399         /* set RX_CFG_C */
2400         data = 0;
2401         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2402                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2403         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2404                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2405         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2406                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2407         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2408                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2409         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2410
2411         rx->last_tail = ((u32)(rx->ring_size - 1));
2412         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2413                           rx->last_tail);
2414         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2415         if (rx->last_head) {
2416                 ret = -EIO;
2417                 goto napi_delete;
2418         }
2419
2420         napi_enable(&rx->napi);
2421
2422         lan743x_csr_write(adapter, INT_EN_SET,
2423                           INT_BIT_DMA_RX_(rx->channel_number));
2424         lan743x_csr_write(adapter, DMAC_INT_STS,
2425                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2426         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2427                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2428         lan743x_csr_write(adapter, DMAC_CMD,
2429                           DMAC_CMD_START_R_(rx->channel_number));
2430
2431         /* initialize fifo */
2432         lan743x_csr_write(adapter, FCT_RX_CTL,
2433                           FCT_RX_CTL_RESET_(rx->channel_number));
2434         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2435                                  FCT_RX_CTL_RESET_(rx->channel_number),
2436                                  0, 1000, 20000, 100);
2437         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2438                           FCT_FLOW_CTL_REQ_EN_ |
2439                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2440                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2441
2442         /* enable fifo */
2443         lan743x_csr_write(adapter, FCT_RX_CTL,
2444                           FCT_RX_CTL_EN_(rx->channel_number));
2445         return 0;
2446
2447 napi_delete:
2448         netif_napi_del(&rx->napi);
2449         lan743x_rx_ring_cleanup(rx);
2450
2451 return_error:
2452         return ret;
2453 }
2454
2455 static int lan743x_netdev_close(struct net_device *netdev)
2456 {
2457         struct lan743x_adapter *adapter = netdev_priv(netdev);
2458         int index;
2459
2460         lan743x_tx_close(&adapter->tx[0]);
2461
2462         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2463                 lan743x_rx_close(&adapter->rx[index]);
2464
2465         lan743x_ptp_close(adapter);
2466
2467         lan743x_phy_close(adapter);
2468
2469         lan743x_mac_close(adapter);
2470
2471         lan743x_intr_close(adapter);
2472
2473         return 0;
2474 }
2475
2476 static int lan743x_netdev_open(struct net_device *netdev)
2477 {
2478         struct lan743x_adapter *adapter = netdev_priv(netdev);
2479         int index;
2480         int ret;
2481
2482         ret = lan743x_intr_open(adapter);
2483         if (ret)
2484                 goto return_error;
2485
2486         ret = lan743x_mac_open(adapter);
2487         if (ret)
2488                 goto close_intr;
2489
2490         ret = lan743x_phy_open(adapter);
2491         if (ret)
2492                 goto close_mac;
2493
2494         ret = lan743x_ptp_open(adapter);
2495         if (ret)
2496                 goto close_phy;
2497
2498         lan743x_rfe_open(adapter);
2499
2500         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2501                 ret = lan743x_rx_open(&adapter->rx[index]);
2502                 if (ret)
2503                         goto close_rx;
2504         }
2505
2506         ret = lan743x_tx_open(&adapter->tx[0]);
2507         if (ret)
2508                 goto close_rx;
2509
2510         return 0;
2511
2512 close_rx:
2513         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2514                 if (adapter->rx[index].ring_cpu_ptr)
2515                         lan743x_rx_close(&adapter->rx[index]);
2516         }
2517         lan743x_ptp_close(adapter);
2518
2519 close_phy:
2520         lan743x_phy_close(adapter);
2521
2522 close_mac:
2523         lan743x_mac_close(adapter);
2524
2525 close_intr:
2526         lan743x_intr_close(adapter);
2527
2528 return_error:
2529         netif_warn(adapter, ifup, adapter->netdev,
2530                    "Error opening LAN743x\n");
2531         return ret;
2532 }
2533
2534 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2535                                              struct net_device *netdev)
2536 {
2537         struct lan743x_adapter *adapter = netdev_priv(netdev);
2538
2539         return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2540 }
2541
2542 static int lan743x_netdev_ioctl(struct net_device *netdev,
2543                                 struct ifreq *ifr, int cmd)
2544 {
2545         if (!netif_running(netdev))
2546                 return -EINVAL;
2547         if (cmd == SIOCSHWTSTAMP)
2548                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2549         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2550 }
2551
2552 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2553 {
2554         struct lan743x_adapter *adapter = netdev_priv(netdev);
2555
2556         lan743x_rfe_set_multicast(adapter);
2557 }
2558
2559 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2560 {
2561         struct lan743x_adapter *adapter = netdev_priv(netdev);
2562         int ret = 0;
2563
2564         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2565         if (!ret)
2566                 netdev->mtu = new_mtu;
2567         return ret;
2568 }
2569
2570 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2571                                        struct rtnl_link_stats64 *stats)
2572 {
2573         struct lan743x_adapter *adapter = netdev_priv(netdev);
2574
2575         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2576         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2577         stats->rx_bytes = lan743x_csr_read(adapter,
2578                                            STAT_RX_UNICAST_BYTE_COUNT) +
2579                           lan743x_csr_read(adapter,
2580                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2581                           lan743x_csr_read(adapter,
2582                                            STAT_RX_MULTICAST_BYTE_COUNT);
2583         stats->tx_bytes = lan743x_csr_read(adapter,
2584                                            STAT_TX_UNICAST_BYTE_COUNT) +
2585                           lan743x_csr_read(adapter,
2586                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2587                           lan743x_csr_read(adapter,
2588                                            STAT_TX_MULTICAST_BYTE_COUNT);
2589         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2590                            lan743x_csr_read(adapter,
2591                                             STAT_RX_ALIGNMENT_ERRORS) +
2592                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2593                            lan743x_csr_read(adapter,
2594                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2595                            lan743x_csr_read(adapter,
2596                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2597         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2598                            lan743x_csr_read(adapter,
2599                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2600                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2601         stats->rx_dropped = lan743x_csr_read(adapter,
2602                                              STAT_RX_DROPPED_FRAMES);
2603         stats->tx_dropped = lan743x_csr_read(adapter,
2604                                              STAT_TX_EXCESSIVE_COLLISION);
2605         stats->multicast = lan743x_csr_read(adapter,
2606                                             STAT_RX_MULTICAST_FRAMES) +
2607                            lan743x_csr_read(adapter,
2608                                             STAT_TX_MULTICAST_FRAMES);
2609         stats->collisions = lan743x_csr_read(adapter,
2610                                              STAT_TX_SINGLE_COLLISIONS) +
2611                             lan743x_csr_read(adapter,
2612                                              STAT_TX_MULTIPLE_COLLISIONS) +
2613                             lan743x_csr_read(adapter,
2614                                              STAT_TX_LATE_COLLISIONS);
2615 }
2616
2617 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2618                                           void *addr)
2619 {
2620         struct lan743x_adapter *adapter = netdev_priv(netdev);
2621         struct sockaddr *sock_addr = addr;
2622         int ret;
2623
2624         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2625         if (ret)
2626                 return ret;
2627         ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2628         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2629         lan743x_rfe_update_mac_address(adapter);
2630         return 0;
2631 }
2632
2633 static const struct net_device_ops lan743x_netdev_ops = {
2634         .ndo_open               = lan743x_netdev_open,
2635         .ndo_stop               = lan743x_netdev_close,
2636         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2637         .ndo_do_ioctl           = lan743x_netdev_ioctl,
2638         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2639         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2640         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2641         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2642 };
2643
2644 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2645 {
2646         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2647 }
2648
2649 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2650 {
2651         mdiobus_unregister(adapter->mdiobus);
2652 }
2653
2654 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2655 {
2656         unregister_netdev(adapter->netdev);
2657
2658         lan743x_mdiobus_cleanup(adapter);
2659         lan743x_hardware_cleanup(adapter);
2660         lan743x_pci_cleanup(adapter);
2661 }
2662
2663 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2664                                  struct pci_dev *pdev)
2665 {
2666         struct lan743x_tx *tx;
2667         int index;
2668         int ret;
2669
2670         adapter->intr.irq = adapter->pdev->irq;
2671         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2672         mutex_init(&adapter->dp_lock);
2673
2674         ret = lan743x_gpio_init(adapter);
2675         if (ret)
2676                 return ret;
2677
2678         ret = lan743x_mac_init(adapter);
2679         if (ret)
2680                 return ret;
2681
2682         ret = lan743x_phy_init(adapter);
2683         if (ret)
2684                 return ret;
2685
2686         ret = lan743x_ptp_init(adapter);
2687         if (ret)
2688                 return ret;
2689
2690         lan743x_rfe_update_mac_address(adapter);
2691
2692         ret = lan743x_dmac_init(adapter);
2693         if (ret)
2694                 return ret;
2695
2696         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2697                 adapter->rx[index].adapter = adapter;
2698                 adapter->rx[index].channel_number = index;
2699         }
2700
2701         tx = &adapter->tx[0];
2702         tx->adapter = adapter;
2703         tx->channel_number = 0;
2704         spin_lock_init(&tx->ring_lock);
2705         return 0;
2706 }
2707
2708 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2709 {
2710         int ret;
2711
2712         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2713         if (!(adapter->mdiobus)) {
2714                 ret = -ENOMEM;
2715                 goto return_error;
2716         }
2717
2718         adapter->mdiobus->priv = (void *)adapter;
2719         adapter->mdiobus->read = lan743x_mdiobus_read;
2720         adapter->mdiobus->write = lan743x_mdiobus_write;
2721         adapter->mdiobus->name = "lan743x-mdiobus";
2722         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2723                  "pci-%s", pci_name(adapter->pdev));
2724
2725         /* set to internal PHY id */
2726         adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2727
2728         /* register mdiobus */
2729         ret = mdiobus_register(adapter->mdiobus);
2730         if (ret < 0)
2731                 goto return_error;
2732         return 0;
2733
2734 return_error:
2735         return ret;
2736 }
2737
2738 /* lan743x_pcidev_probe - Device Initialization Routine
2739  * @pdev: PCI device information struct
2740  * @id: entry in lan743x_pci_tbl
2741  *
2742  * Returns 0 on success, negative on failure
2743  *
2744  * initializes an adapter identified by a pci_dev structure.
2745  * The OS initialization, configuring of the adapter private structure,
2746  * and a hardware reset occur.
2747  **/
2748 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2749                                 const struct pci_device_id *id)
2750 {
2751         struct lan743x_adapter *adapter = NULL;
2752         struct net_device *netdev = NULL;
2753         int ret = -ENODEV;
2754
2755         netdev = devm_alloc_etherdev(&pdev->dev,
2756                                      sizeof(struct lan743x_adapter));
2757         if (!netdev)
2758                 goto return_error;
2759
2760         SET_NETDEV_DEV(netdev, &pdev->dev);
2761         pci_set_drvdata(pdev, netdev);
2762         adapter = netdev_priv(netdev);
2763         adapter->netdev = netdev;
2764         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2765                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
2766                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2767         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2768
2769         ret = lan743x_pci_init(adapter, pdev);
2770         if (ret)
2771                 goto return_error;
2772
2773         ret = lan743x_csr_init(adapter);
2774         if (ret)
2775                 goto cleanup_pci;
2776
2777         ret = lan743x_hardware_init(adapter, pdev);
2778         if (ret)
2779                 goto cleanup_pci;
2780
2781         ret = lan743x_mdiobus_init(adapter);
2782         if (ret)
2783                 goto cleanup_hardware;
2784
2785         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2786         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2787         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2788         adapter->netdev->hw_features = adapter->netdev->features;
2789
2790         /* carrier off reporting is important to ethtool even BEFORE open */
2791         netif_carrier_off(netdev);
2792
2793         ret = register_netdev(adapter->netdev);
2794         if (ret < 0)
2795                 goto cleanup_mdiobus;
2796         return 0;
2797
2798 cleanup_mdiobus:
2799         lan743x_mdiobus_cleanup(adapter);
2800
2801 cleanup_hardware:
2802         lan743x_hardware_cleanup(adapter);
2803
2804 cleanup_pci:
2805         lan743x_pci_cleanup(adapter);
2806
2807 return_error:
2808         pr_warn("Initialization failed\n");
2809         return ret;
2810 }
2811
2812 /**
2813  * lan743x_pcidev_remove - Device Removal Routine
2814  * @pdev: PCI device information struct
2815  *
2816  * this is called by the PCI subsystem to alert the driver
2817  * that it should release a PCI device.  This could be caused by a
2818  * Hot-Plug event, or because the driver is going to be removed from
2819  * memory.
2820  **/
2821 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2822 {
2823         struct net_device *netdev = pci_get_drvdata(pdev);
2824         struct lan743x_adapter *adapter = netdev_priv(netdev);
2825
2826         lan743x_full_cleanup(adapter);
2827 }
2828
2829 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2830 {
2831         struct net_device *netdev = pci_get_drvdata(pdev);
2832         struct lan743x_adapter *adapter = netdev_priv(netdev);
2833
2834         rtnl_lock();
2835         netif_device_detach(netdev);
2836
2837         /* close netdev when netdev is at running state.
2838          * For instance, it is true when system goes to sleep by pm-suspend
2839          * However, it is false when system goes to sleep by suspend GUI menu
2840          */
2841         if (netif_running(netdev))
2842                 lan743x_netdev_close(netdev);
2843         rtnl_unlock();
2844
2845 #ifdef CONFIG_PM
2846         pci_save_state(pdev);
2847 #endif
2848
2849         /* clean up lan743x portion */
2850         lan743x_hardware_cleanup(adapter);
2851 }
2852
2853 #ifdef CONFIG_PM
2854 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2855 {
2856         return bitrev16(crc16(0xFFFF, buf, len));
2857 }
2858
2859 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2860 {
2861         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2862         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2863         const u8 arp_type[2] = { 0x08, 0x06 };
2864         int mask_index;
2865         u32 pmtctl;
2866         u32 wucsr;
2867         u32 macrx;
2868         u16 crc;
2869
2870         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2871                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2872
2873         /* clear wake settings */
2874         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2875         pmtctl |= PMT_CTL_WUPS_MASK_;
2876         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2877                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2878                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2879
2880         macrx = lan743x_csr_read(adapter, MAC_RX);
2881
2882         wucsr = 0;
2883         mask_index = 0;
2884
2885         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2886
2887         if (adapter->wolopts & WAKE_PHY) {
2888                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2889                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2890         }
2891         if (adapter->wolopts & WAKE_MAGIC) {
2892                 wucsr |= MAC_WUCSR_MPEN_;
2893                 macrx |= MAC_RX_RXEN_;
2894                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2895         }
2896         if (adapter->wolopts & WAKE_UCAST) {
2897                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2898                 macrx |= MAC_RX_RXEN_;
2899                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2900                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2901         }
2902         if (adapter->wolopts & WAKE_BCAST) {
2903                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2904                 macrx |= MAC_RX_RXEN_;
2905                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2906                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2907         }
2908         if (adapter->wolopts & WAKE_MCAST) {
2909                 /* IPv4 multicast */
2910                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2911                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2912                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2913                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2914                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2915                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2916                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2917                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2918                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2919                 mask_index++;
2920
2921                 /* IPv6 multicast */
2922                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2923                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2924                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2925                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2926                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2927                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2928                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2929                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2930                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2931                 mask_index++;
2932
2933                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2934                 macrx |= MAC_RX_RXEN_;
2935                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2936                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2937         }
2938         if (adapter->wolopts & WAKE_ARP) {
2939                 /* set MAC_WUF_CFG & WUF_MASK
2940                  * for packettype (offset 12,13) = ARP (0x0806)
2941                  */
2942                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2943                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2944                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2945                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2946                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2947                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2948                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2949                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2950                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2951                 mask_index++;
2952
2953                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2954                 macrx |= MAC_RX_RXEN_;
2955                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2956                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2957         }
2958
2959         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2960         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2961         lan743x_csr_write(adapter, MAC_RX, macrx);
2962 }
2963
2964 static int lan743x_pm_suspend(struct device *dev)
2965 {
2966         struct pci_dev *pdev = to_pci_dev(dev);
2967         struct net_device *netdev = pci_get_drvdata(pdev);
2968         struct lan743x_adapter *adapter = netdev_priv(netdev);
2969         int ret;
2970
2971         lan743x_pcidev_shutdown(pdev);
2972
2973         /* clear all wakes */
2974         lan743x_csr_write(adapter, MAC_WUCSR, 0);
2975         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2976         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
2977
2978         if (adapter->wolopts)
2979                 lan743x_pm_set_wol(adapter);
2980
2981         /* Host sets PME_En, put D3hot */
2982         ret = pci_prepare_to_sleep(pdev);
2983
2984         return 0;
2985 }
2986
2987 static int lan743x_pm_resume(struct device *dev)
2988 {
2989         struct pci_dev *pdev = to_pci_dev(dev);
2990         struct net_device *netdev = pci_get_drvdata(pdev);
2991         struct lan743x_adapter *adapter = netdev_priv(netdev);
2992         int ret;
2993
2994         pci_set_power_state(pdev, PCI_D0);
2995         pci_restore_state(pdev);
2996         pci_save_state(pdev);
2997
2998         ret = lan743x_hardware_init(adapter, pdev);
2999         if (ret) {
3000                 netif_err(adapter, probe, adapter->netdev,
3001                           "lan743x_hardware_init returned %d\n", ret);
3002         }
3003
3004         /* open netdev when netdev is at running state while resume.
3005          * For instance, it is true when system wakesup after pm-suspend
3006          * However, it is false when system wakes up after suspend GUI menu
3007          */
3008         if (netif_running(netdev))
3009                 lan743x_netdev_open(netdev);
3010
3011         netif_device_attach(netdev);
3012
3013         return 0;
3014 }
3015
3016 static const struct dev_pm_ops lan743x_pm_ops = {
3017         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3018 };
3019 #endif /*CONFIG_PM */
3020
3021 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3022         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3023         { 0, }
3024 };
3025
3026 static struct pci_driver lan743x_pcidev_driver = {
3027         .name     = DRIVER_NAME,
3028         .id_table = lan743x_pcidev_tbl,
3029         .probe    = lan743x_pcidev_probe,
3030         .remove   = lan743x_pcidev_remove,
3031 #ifdef CONFIG_PM
3032         .driver.pm = &lan743x_pm_ops,
3033 #endif
3034         .shutdown = lan743x_pcidev_shutdown,
3035 };
3036
3037 module_pci_driver(lan743x_pcidev_driver);
3038
3039 MODULE_AUTHOR(DRIVER_AUTHOR);
3040 MODULE_DESCRIPTION(DRIVER_DESC);
3041 MODULE_LICENSE("GPL");