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/of_mdio.h>
  12 #include <linux/of_net.h>
  13 #include <linux/phy.h>
  14 #include <linux/phy_fixed.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/iopoll.h>
  17 #include <linux/crc16.h>
  18 #include "lan743x_main.h"
  19 #include "lan743x_ethtool.h"
  20
  21 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  22 {
  23         pci_release_selected_regions(adapter->pdev,
  24                                      pci_select_bars(adapter->pdev,
  25                                                      IORESOURCE_MEM));
  26         pci_disable_device(adapter->pdev);
  27 }
  28
  29 static int lan743x_pci_init(struct lan743x_adapter *adapter,
  30                             struct pci_dev *pdev)
  31 {
  32         unsigned long bars = 0;
  33         int ret;
  34
  35         adapter->pdev = pdev;
  36         ret = pci_enable_device_mem(pdev);
  37         if (ret)
  38                 goto return_error;
  39
  40         netif_info(adapter, probe, adapter->netdev,
  41                    "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
  42                    pdev->vendor, pdev->device);
  43         bars = pci_select_bars(pdev, IORESOURCE_MEM);
  44         if (!test_bit(0, &bars))
  45                 goto disable_device;
  46
  47         ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
  48         if (ret)
  49                 goto disable_device;
  50
  51         pci_set_master(pdev);
  52         return 0;
  53
  54 disable_device:
  55         pci_disable_device(adapter->pdev);
  56
  57 return_error:
  58         return ret;
  59 }
  60
  61 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
  62 {
  63         return ioread32(&adapter->csr.csr_address[offset]);
  64 }
  65
  66 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
  67                        u32 data)
  68 {
  69         iowrite32(data, &adapter->csr.csr_address[offset]);
  70 }
  71
  72 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
  73
  74 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
  75 {
  76         u32 data;
  77
  78         data = lan743x_csr_read(adapter, HW_CFG);
  79         data |= HW_CFG_LRST_;
  80         lan743x_csr_write(adapter, HW_CFG, data);
  81
  82         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
  83                                   !(data & HW_CFG_LRST_), 100000, 10000000);
  84 }
  85
  86 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
  87                                     int offset, u32 bit_mask,
  88                                     int target_value, int usleep_min,
  89                                     int usleep_max, int count)
  90 {
  91         u32 data;
  92
  93         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
  94                                   target_value == ((data & bit_mask) ? 1 : 0),
  95                                   usleep_max, usleep_min * count);
  96 }
  97
  98 static int lan743x_csr_init(struct lan743x_adapter *adapter)
  99 {
 100         struct lan743x_csr *csr = &adapter->csr;
 101         resource_size_t bar_start, bar_length;
 102         int result;
 103
 104         bar_start = pci_resource_start(adapter->pdev, 0);
 105         bar_length = pci_resource_len(adapter->pdev, 0);
 106         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 107                                         bar_start, bar_length);
 108         if (!csr->csr_address) {
 109                 result = -ENOMEM;
 110                 goto clean_up;
 111         }
 112
 113         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 114         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 115         netif_info(adapter, probe, adapter->netdev,
 116                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 117                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 118                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 119         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 120                 result = -ENODEV;
 121                 goto clean_up;
 122         }
 123
 124         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 125         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 126         case ID_REV_CHIP_REV_A0_:
 127                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 128                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 129                 break;
 130         case ID_REV_CHIP_REV_B0_:
 131                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 132                 break;
 133         }
 134
 135         result = lan743x_csr_light_reset(adapter);
 136         if (result)
 137                 goto clean_up;
 138         return 0;
 139 clean_up:
 140         return result;
 141 }
 142
 143 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter)
 144 {
 145         struct lan743x_intr *intr = &adapter->intr;
 146
 147         /* disable the interrupt to prevent repeated re-triggering */
 148         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 149         intr->software_isr_flag = true;
 150         wake_up(&intr->software_isr_wq);
 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
 159         lan743x_csr_read(adapter, INT_EN_SET);
 160         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 161                 lan743x_csr_write(adapter, INT_EN_CLR,
 162                                   INT_BIT_DMA_TX_(tx->channel_number));
 163         }
 164
 165         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 166                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 167                 u32 dmac_int_sts;
 168                 u32 dmac_int_en;
 169
 170                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 171                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 172                 else
 173                         dmac_int_sts = ioc_bit;
 174                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 175                         dmac_int_en = lan743x_csr_read(adapter,
 176                                                        DMAC_INT_EN_SET);
 177                 else
 178                         dmac_int_en = ioc_bit;
 179
 180                 dmac_int_en &= ioc_bit;
 181                 dmac_int_sts &= dmac_int_en;
 182                 if (dmac_int_sts & ioc_bit) {
 183                         napi_schedule(&tx->napi);
 184                         enable_flag = false;/* poll func will enable later */
 185                 }
 186         }
 187
 188         if (enable_flag)
 189                 /* enable isr */
 190                 lan743x_csr_write(adapter, INT_EN_SET,
 191                                   INT_BIT_DMA_TX_(tx->channel_number));
 192 }
 193
 194 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 195 {
 196         struct lan743x_rx *rx = context;
 197         struct lan743x_adapter *adapter = rx->adapter;
 198         bool enable_flag = true;
 199
 200         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 201                 lan743x_csr_write(adapter, INT_EN_CLR,
 202                                   INT_BIT_DMA_RX_(rx->channel_number));
 203         }
 204
 205         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 206                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 207                 u32 dmac_int_sts;
 208                 u32 dmac_int_en;
 209
 210                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 211                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 212                 else
 213                         dmac_int_sts = rx_frame_bit;
 214                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 215                         dmac_int_en = lan743x_csr_read(adapter,
 216                                                        DMAC_INT_EN_SET);
 217                 else
 218                         dmac_int_en = rx_frame_bit;
 219
 220                 dmac_int_en &= rx_frame_bit;
 221                 dmac_int_sts &= dmac_int_en;
 222                 if (dmac_int_sts & rx_frame_bit) {
 223                         napi_schedule(&rx->napi);
 224                         enable_flag = false;/* poll funct will enable later */
 225                 }
 226         }
 227
 228         if (enable_flag) {
 229                 /* enable isr */
 230                 lan743x_csr_write(adapter, INT_EN_SET,
 231                                   INT_BIT_DMA_RX_(rx->channel_number));
 232         }
 233 }
 234
 235 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 236 {
 237         struct lan743x_adapter *adapter = context;
 238         unsigned int channel;
 239
 240         if (int_sts & INT_BIT_ALL_RX_) {
 241                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 242                         channel++) {
 243                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 244
 245                         if (int_sts & int_bit) {
 246                                 lan743x_rx_isr(&adapter->rx[channel],
 247                                                int_bit, flags);
 248                                 int_sts &= ~int_bit;
 249                         }
 250                 }
 251         }
 252         if (int_sts & INT_BIT_ALL_TX_) {
 253                 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
 254                         channel++) {
 255                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 256
 257                         if (int_sts & int_bit) {
 258                                 lan743x_tx_isr(&adapter->tx[channel],
 259                                                int_bit, flags);
 260                                 int_sts &= ~int_bit;
 261                         }
 262                 }
 263         }
 264         if (int_sts & INT_BIT_ALL_OTHER_) {
 265                 if (int_sts & INT_BIT_SW_GP_) {
 266                         lan743x_intr_software_isr(adapter);
 267                         int_sts &= ~INT_BIT_SW_GP_;
 268                 }
 269                 if (int_sts & INT_BIT_1588_) {
 270                         lan743x_ptp_isr(adapter);
 271                         int_sts &= ~INT_BIT_1588_;
 272                 }
 273         }
 274         if (int_sts)
 275                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 276 }
 277
 278 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 279 {
 280         struct lan743x_vector *vector = ptr;
 281         struct lan743x_adapter *adapter = vector->adapter;
 282         irqreturn_t result = IRQ_NONE;
 283         u32 int_enables;
 284         u32 int_sts;
 285
 286         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 287                 int_sts = lan743x_csr_read(adapter, INT_STS);
 288         } else if (vector->flags &
 289                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 290                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 291                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 292         } else {
 293                 /* use mask as implied status */
 294                 int_sts = vector->int_mask | INT_BIT_MAS_;
 295         }
 296
 297         if (!(int_sts & INT_BIT_MAS_))
 298                 goto irq_done;
 299
 300         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 301                 /* disable vector interrupt */
 302                 lan743x_csr_write(adapter,
 303                                   INT_VEC_EN_CLR,
 304                                   INT_VEC_EN_(vector->vector_index));
 305
 306         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 307                 /* disable master interrupt */
 308                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 309
 310         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 311                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 312         } else {
 313                 /*  use vector mask as implied enable mask */
 314                 int_enables = vector->int_mask;
 315         }
 316
 317         int_sts &= int_enables;
 318         int_sts &= vector->int_mask;
 319         if (int_sts) {
 320                 if (vector->handler) {
 321                         vector->handler(vector->context,
 322                                         int_sts, vector->flags);
 323                 } else {
 324                         /* disable interrupts on this vector */
 325                         lan743x_csr_write(adapter, INT_EN_CLR,
 326                                           vector->int_mask);
 327                 }
 328                 result = IRQ_HANDLED;
 329         }
 330
 331         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 332                 /* enable master interrupt */
 333                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 334
 335         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 336                 /* enable vector interrupt */
 337                 lan743x_csr_write(adapter,
 338                                   INT_VEC_EN_SET,
 339                                   INT_VEC_EN_(vector->vector_index));
 340 irq_done:
 341         return result;
 342 }
 343
 344 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 345 {
 346         struct lan743x_intr *intr = &adapter->intr;
 347         int ret;
 348
 349         intr->software_isr_flag = false;
 350
 351         /* enable and activate test interrupt */
 352         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 353         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 354
 355         ret = wait_event_timeout(intr->software_isr_wq,
 356                                  intr->software_isr_flag,
 357                                  msecs_to_jiffies(200));
 358
 359         /* disable test interrupt */
 360         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 361
 362         return ret > 0 ? 0 : -ENODEV;
 363 }
 364
 365 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 366                                      int vector_index, u32 flags,
 367                                      u32 int_mask,
 368                                      lan743x_vector_handler handler,
 369                                      void *context)
 370 {
 371         struct lan743x_vector *vector = &adapter->intr.vector_list
 372                                         [vector_index];
 373         int ret;
 374
 375         vector->adapter = adapter;
 376         vector->flags = flags;
 377         vector->vector_index = vector_index;
 378         vector->int_mask = int_mask;
 379         vector->handler = handler;
 380         vector->context = context;
 381
 382         ret = request_irq(vector->irq,
 383                           lan743x_intr_entry_isr,
 384                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 385                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 386         if (ret) {
 387                 vector->handler = NULL;
 388                 vector->context = NULL;
 389                 vector->int_mask = 0;
 390                 vector->flags = 0;
 391         }
 392         return ret;
 393 }
 394
 395 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 396                                         int vector_index)
 397 {
 398         struct lan743x_vector *vector = &adapter->intr.vector_list
 399                                         [vector_index];
 400
 401         free_irq(vector->irq, vector);
 402         vector->handler = NULL;
 403         vector->context = NULL;
 404         vector->int_mask = 0;
 405         vector->flags = 0;
 406 }
 407
 408 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 409                                          u32 int_mask)
 410 {
 411         int index;
 412
 413         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 414                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 415                         return adapter->intr.vector_list[index].flags;
 416         }
 417         return 0;
 418 }
 419
 420 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 421 {
 422         struct lan743x_intr *intr = &adapter->intr;
 423         int index = 0;
 424
 425         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 426         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 427
 428         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
 429                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 430                         lan743x_intr_unregister_isr(adapter, index);
 431                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 432                 }
 433         }
 434
 435         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 436                 pci_disable_msi(adapter->pdev);
 437                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 438         }
 439
 440         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 441                 pci_disable_msix(adapter->pdev);
 442                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 443         }
 444 }
 445
 446 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 447 {
 448         struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
 449         struct lan743x_intr *intr = &adapter->intr;
 450         u32 int_vec_en_auto_clr = 0;
 451         u32 int_vec_map0 = 0;
 452         u32 int_vec_map1 = 0;
 453         int ret = -ENODEV;
 454         int index = 0;
 455         u32 flags = 0;
 456
 457         intr->number_of_vectors = 0;
 458
 459         /* Try to set up MSIX interrupts */
 460         memset(&msix_entries[0], 0,
 461                sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
 462         for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
 463                 msix_entries[index].entry = index;
 464         ret = pci_enable_msix_range(adapter->pdev,
 465                                     msix_entries, 1,
 466                                     1 + LAN743X_USED_TX_CHANNELS +
 467                                     LAN743X_USED_RX_CHANNELS);
 468
 469         if (ret > 0) {
 470                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 471                 intr->number_of_vectors = ret;
 472                 intr->using_vectors = true;
 473                 for (index = 0; index < intr->number_of_vectors; index++)
 474                         intr->vector_list[index].irq = msix_entries
 475                                                        [index].vector;
 476                 netif_info(adapter, ifup, adapter->netdev,
 477                            "using MSIX interrupts, number of vectors = %d\n",
 478                            intr->number_of_vectors);
 479         }
 480
 481         /* If MSIX failed try to setup using MSI interrupts */
 482         if (!intr->number_of_vectors) {
 483                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 484                         if (!pci_enable_msi(adapter->pdev)) {
 485                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 486                                 intr->number_of_vectors = 1;
 487                                 intr->using_vectors = true;
 488                                 intr->vector_list[0].irq =
 489                                         adapter->pdev->irq;
 490                                 netif_info(adapter, ifup, adapter->netdev,
 491                                            "using MSI interrupts, number of vectors = %d\n",
 492                                            intr->number_of_vectors);
 493                         }
 494                 }
 495         }
 496
 497         /* If MSIX, and MSI failed, setup using legacy interrupt */
 498         if (!intr->number_of_vectors) {
 499                 intr->number_of_vectors = 1;
 500                 intr->using_vectors = false;
 501                 intr->vector_list[0].irq = intr->irq;
 502                 netif_info(adapter, ifup, adapter->netdev,
 503                            "using legacy interrupts\n");
 504         }
 505
 506         /* At this point we must have at least one irq */
 507         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 508
 509         /* map all interrupts to vector 0 */
 510         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 511         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 512         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 513         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 514                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 515                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 516                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 517
 518         if (intr->using_vectors) {
 519                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 520                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 521         } else {
 522                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 523                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 524                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 525         }
 526
 527         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 528                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 529                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 530                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 531                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 532                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 533                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 534         }
 535
 536         init_waitqueue_head(&intr->software_isr_wq);
 537
 538         ret = lan743x_intr_register_isr(adapter, 0, flags,
 539                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 540                                         INT_BIT_ALL_OTHER_,
 541                                         lan743x_intr_shared_isr, adapter);
 542         if (ret)
 543                 goto clean_up;
 544         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 545
 546         if (intr->using_vectors)
 547                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 548                                   INT_VEC_EN_(0));
 549
 550         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 551                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 552                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 553                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 554                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 555                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 556                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 557                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 558                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 559                 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 560                 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 561                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 562         }
 563
 564         /* enable interrupts */
 565         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 566         ret = lan743x_intr_test_isr(adapter);
 567         if (ret)
 568                 goto clean_up;
 569
 570         if (intr->number_of_vectors > 1) {
 571                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 572
 573                 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
 574                         number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
 575                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 576                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 577                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 578                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 579                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 580                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 581
 582                 if (adapter->csr.flags &
 583                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 584                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 585                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 586                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 587                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 588                 }
 589
 590                 for (index = 0; index < number_of_tx_vectors; index++) {
 591                         u32 int_bit = INT_BIT_DMA_TX_(index);
 592                         int vector = index + 1;
 593
 594                         /* map TX interrupt to vector */
 595                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 596                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 597
 598                         /* Remove TX interrupt from shared mask */
 599                         intr->vector_list[0].int_mask &= ~int_bit;
 600                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 601                                                         int_bit, lan743x_tx_isr,
 602                                                         &adapter->tx[index]);
 603                         if (ret)
 604                                 goto clean_up;
 605                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 606                         if (!(flags &
 607                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 608                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 609                                                   INT_VEC_EN_(vector));
 610                 }
 611         }
 612         if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
 613                 int number_of_rx_vectors = intr->number_of_vectors -
 614                                            LAN743X_USED_TX_CHANNELS - 1;
 615
 616                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 617                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 618
 619                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 620                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 621                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 622                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 623                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 624                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 625
 626                 if (adapter->csr.flags &
 627                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 628                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 629                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 630                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 631                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 632                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 633                 }
 634                 for (index = 0; index < number_of_rx_vectors; index++) {
 635                         int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
 636                         u32 int_bit = INT_BIT_DMA_RX_(index);
 637
 638                         /* map RX interrupt to vector */
 639                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 640                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 641                         if (flags &
 642                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 643                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 644                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 645                                                   int_vec_en_auto_clr);
 646                         }
 647
 648                         /* Remove RX interrupt from shared mask */
 649                         intr->vector_list[0].int_mask &= ~int_bit;
 650                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 651                                                         int_bit, lan743x_rx_isr,
 652                                                         &adapter->rx[index]);
 653                         if (ret)
 654                                 goto clean_up;
 655                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 656
 657                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 658                                           INT_VEC_EN_(vector));
 659                 }
 660         }
 661         return 0;
 662
 663 clean_up:
 664         lan743x_intr_close(adapter);
 665         return ret;
 666 }
 667
 668 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 669                             u32 select, u32 addr, u32 length, u32 *buf)
 670 {
 671         u32 dp_sel;
 672         int i;
 673
 674         if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 675                                      1, 40, 100, 100))
 676                 return -EIO;
 677         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 678         dp_sel &= ~DP_SEL_MASK_;
 679         dp_sel |= select;
 680         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 681
 682         for (i = 0; i < length; i++) {
 683                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 684                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 685                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 686                 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 687                                              1, 40, 100, 100))
 688                         return -EIO;
 689         }
 690
 691         return 0;
 692 }
 693
 694 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 695 {
 696         u32 ret;
 697
 698         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 699                 MAC_MII_ACC_PHY_ADDR_MASK_;
 700         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 701                 MAC_MII_ACC_MIIRINDA_MASK_;
 702
 703         if (read)
 704                 ret |= MAC_MII_ACC_MII_READ_;
 705         else
 706                 ret |= MAC_MII_ACC_MII_WRITE_;
 707         ret |= MAC_MII_ACC_MII_BUSY_;
 708
 709         return ret;
 710 }
 711
 712 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 713 {
 714         u32 data;
 715
 716         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 717                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 718 }
 719
 720 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 721 {
 722         struct lan743x_adapter *adapter = bus->priv;
 723         u32 val, mii_access;
 724         int ret;
 725
 726         /* comfirm MII not busy */
 727         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 728         if (ret < 0)
 729                 return ret;
 730
 731         /* set the address, index & direction (read from PHY) */
 732         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 733         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 734         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 735         if (ret < 0)
 736                 return ret;
 737
 738         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 739         return (int)(val & 0xFFFF);
 740 }
 741
 742 static int lan743x_mdiobus_write(struct mii_bus *bus,
 743                                  int phy_id, int index, u16 regval)
 744 {
 745         struct lan743x_adapter *adapter = bus->priv;
 746         u32 val, mii_access;
 747         int ret;
 748
 749         /* confirm MII not busy */
 750         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 751         if (ret < 0)
 752                 return ret;
 753         val = (u32)regval;
 754         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 755
 756         /* set the address, index & direction (write to PHY) */
 757         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 758         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 759         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 760         return ret;
 761 }
 762
 763 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 764                                     u8 *addr)
 765 {
 766         u32 addr_lo, addr_hi;
 767
 768         addr_lo = addr[0] |
 769                 addr[1] << 8 |
 770                 addr[2] << 16 |
 771                 addr[3] << 24;
 772         addr_hi = addr[4] |
 773                 addr[5] << 8;
 774         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 775         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 776
 777         ether_addr_copy(adapter->mac_address, addr);
 778         netif_info(adapter, drv, adapter->netdev,
 779                    "MAC address set to %pM\n", addr);
 780 }
 781
 782 static int lan743x_mac_init(struct lan743x_adapter *adapter)
 783 {
 784         bool mac_address_valid = true;
 785         struct net_device *netdev;
 786         u32 mac_addr_hi = 0;
 787         u32 mac_addr_lo = 0;
 788         u32 data;
 789
 790         netdev = adapter->netdev;
 791
 792         /* disable auto duplex, and speed detection. Phylib does that */
 793         data = lan743x_csr_read(adapter, MAC_CR);
 794         data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
 795         data |= MAC_CR_CNTR_RST_;
 796         lan743x_csr_write(adapter, MAC_CR, data);
 797
 798         if (!is_valid_ether_addr(adapter->mac_address)) {
 799                 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 800                 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 801                 adapter->mac_address[0] = mac_addr_lo & 0xFF;
 802                 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 803                 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 804                 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 805                 adapter->mac_address[4] = mac_addr_hi & 0xFF;
 806                 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 807
 808                 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 809                     mac_addr_lo == 0xFFFFFFFF) {
 810                         mac_address_valid = false;
 811                 } else if (!is_valid_ether_addr(adapter->mac_address)) {
 812                         mac_address_valid = false;
 813                 }
 814
 815                 if (!mac_address_valid)
 816                         eth_random_addr(adapter->mac_address);
 817         }
 818         lan743x_mac_set_address(adapter, adapter->mac_address);
 819         ether_addr_copy(netdev->dev_addr, adapter->mac_address);
 820
 821         return 0;
 822 }
 823
 824 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 825 {
 826         u32 temp;
 827
 828         temp = lan743x_csr_read(adapter, MAC_RX);
 829         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 830         temp = lan743x_csr_read(adapter, MAC_TX);
 831         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 832         return 0;
 833 }
 834
 835 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 836 {
 837         u32 temp;
 838
 839         temp = lan743x_csr_read(adapter, MAC_TX);
 840         temp &= ~MAC_TX_TXEN_;
 841         lan743x_csr_write(adapter, MAC_TX, temp);
 842         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 843                                  1, 1000, 20000, 100);
 844
 845         temp = lan743x_csr_read(adapter, MAC_RX);
 846         temp &= ~MAC_RX_RXEN_;
 847         lan743x_csr_write(adapter, MAC_RX, temp);
 848         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 849                                  1, 1000, 20000, 100);
 850 }
 851
 852 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
 853                                               bool tx_enable, bool rx_enable)
 854 {
 855         u32 flow_setting = 0;
 856
 857         /* set maximum pause time because when fifo space frees
 858          * up a zero value pause frame will be sent to release the pause
 859          */
 860         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
 861         if (tx_enable)
 862                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
 863         if (rx_enable)
 864                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
 865         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
 866 }
 867
 868 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
 869 {
 870         int enabled = 0;
 871         u32 mac_rx = 0;
 872
 873         mac_rx = lan743x_csr_read(adapter, MAC_RX);
 874         if (mac_rx & MAC_RX_RXEN_) {
 875                 enabled = 1;
 876                 if (mac_rx & MAC_RX_RXD_) {
 877                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 878                         mac_rx &= ~MAC_RX_RXD_;
 879                 }
 880                 mac_rx &= ~MAC_RX_RXEN_;
 881                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 882                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 883                                          1, 1000, 20000, 100);
 884                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
 885         }
 886
 887         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
 888         mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN)
 889                   << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
 890         lan743x_csr_write(adapter, MAC_RX, mac_rx);
 891
 892         if (enabled) {
 893                 mac_rx |= MAC_RX_RXEN_;
 894                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
 895         }
 896         return 0;
 897 }
 898
 899 /* PHY */
 900 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 901 {
 902         u32 data;
 903
 904         /* Only called with in probe, and before mdiobus_register */
 905
 906         data = lan743x_csr_read(adapter, PMT_CTL);
 907         data |= PMT_CTL_ETH_PHY_RST_;
 908         lan743x_csr_write(adapter, PMT_CTL, data);
 909
 910         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
 911                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
 912                                   (data & PMT_CTL_READY_)),
 913                                   50000, 1000000);
 914 }
 915
 916 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
 917                                            u8 duplex, u16 local_adv,
 918                                            u16 remote_adv)
 919 {
 920         struct lan743x_phy *phy = &adapter->phy;
 921         u8 cap;
 922
 923         if (phy->fc_autoneg)
 924                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
 925         else
 926                 cap = phy->fc_request_control;
 927
 928         lan743x_mac_flow_ctrl_set_enables(adapter,
 929                                           cap & FLOW_CTRL_TX,
 930                                           cap & FLOW_CTRL_RX);
 931 }
 932
 933 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 934 {
 935         return lan743x_phy_reset(adapter);
 936 }
 937
 938 static void lan743x_phy_link_status_change(struct net_device *netdev)
 939 {
 940         struct lan743x_adapter *adapter = netdev_priv(netdev);
 941         struct phy_device *phydev = netdev->phydev;
 942         u32 data;
 943
 944         phy_print_status(phydev);
 945         if (phydev->state == PHY_RUNNING) {
 946                 struct ethtool_link_ksettings ksettings;
 947                 int remote_advertisement = 0;
 948                 int local_advertisement = 0;
 949
 950                 data = lan743x_csr_read(adapter, MAC_CR);
 951
 952                 /* set interface mode */
 953                 if (phy_interface_is_rgmii(phydev))
 954                         /* RGMII */
 955                         data &= ~MAC_CR_MII_EN_;
 956                 else
 957                         /* GMII */
 958                         data |= MAC_CR_MII_EN_;
 959
 960                 /* set duplex mode */
 961                 if (phydev->duplex)
 962                         data |= MAC_CR_DPX_;
 963                 else
 964                         data &= ~MAC_CR_DPX_;
 965
 966                 /* set bus speed */
 967                 switch (phydev->speed) {
 968                 case SPEED_10:
 969                         data &= ~MAC_CR_CFG_H_;
 970                         data &= ~MAC_CR_CFG_L_;
 971                 break;
 972                 case SPEED_100:
 973                         data &= ~MAC_CR_CFG_H_;
 974                         data |= MAC_CR_CFG_L_;
 975                 break;
 976                 case SPEED_1000:
 977                         data |= MAC_CR_CFG_H_;
 978                         data &= ~MAC_CR_CFG_L_;
 979                 break;
 980                 }
 981                 lan743x_csr_write(adapter, MAC_CR, data);
 982
 983                 memset(&ksettings, 0, sizeof(ksettings));
 984                 phy_ethtool_get_link_ksettings(netdev, &ksettings);
 985                 local_advertisement =
 986                         linkmode_adv_to_mii_adv_t(phydev->advertising);
 987                 remote_advertisement =
 988                         linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
 989
 990                 lan743x_phy_update_flowcontrol(adapter,
 991                                                ksettings.base.duplex,
 992                                                local_advertisement,
 993                                                remote_advertisement);
 994                 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
 995         }
 996 }
 997
 998 static void lan743x_phy_close(struct lan743x_adapter *adapter)
 999 {
1000         struct net_device *netdev = adapter->netdev;
1001
1002         phy_stop(netdev->phydev);
1003         phy_disconnect(netdev->phydev);
1004         netdev->phydev = NULL;
1005 }
1006
1007 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1008 {
1009         struct net_device *netdev = adapter->netdev;
1010         struct lan743x_phy *phy = &adapter->phy;
1011         struct phy_device *phydev;
1012         int ret = -EIO;
1013
1014         /* try devicetree phy, or fixed link */
1015         phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1016                                         lan743x_phy_link_status_change);
1017
1018         if (!phydev) {
1019                 /* try internal phy */
1020                 phydev = phy_find_first(adapter->mdiobus);
1021                 if (!phydev)
1022                         goto return_error;
1023
1024                 ret = phy_connect_direct(netdev, phydev,
1025                                          lan743x_phy_link_status_change,
1026                                          PHY_INTERFACE_MODE_GMII);
1027                 if (ret)
1028                         goto return_error;
1029         }
1030
1031         /* MAC doesn't support 1000T Half */
1032         phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1033
1034         /* support both flow controls */
1035         phy_support_asym_pause(phydev);
1036         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1037         phy->fc_autoneg = phydev->autoneg;
1038
1039         phy_start(phydev);
1040         phy_start_aneg(phydev);
1041         phy_attached_info(phydev);
1042         return 0;
1043
1044 return_error:
1045         return ret;
1046 }
1047
1048 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1049 {
1050         lan743x_csr_write(adapter, RFE_RSS_CFG,
1051                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1052                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1053                 RFE_RSS_CFG_IPV6_EX_ |
1054                 RFE_RSS_CFG_UDP_IPV6_ |
1055                 RFE_RSS_CFG_TCP_IPV6_ |
1056                 RFE_RSS_CFG_IPV6_ |
1057                 RFE_RSS_CFG_UDP_IPV4_ |
1058                 RFE_RSS_CFG_TCP_IPV4_ |
1059                 RFE_RSS_CFG_IPV4_ |
1060                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1061                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1062                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1063                 RFE_RSS_CFG_RSS_ENABLE_);
1064 }
1065
1066 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1067 {
1068         u8 *mac_addr;
1069         u32 mac_addr_hi = 0;
1070         u32 mac_addr_lo = 0;
1071
1072         /* Add mac address to perfect Filter */
1073         mac_addr = adapter->mac_address;
1074         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1075                       (((u32)(mac_addr[1])) << 8) |
1076                       (((u32)(mac_addr[2])) << 16) |
1077                       (((u32)(mac_addr[3])) << 24));
1078         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1079                       (((u32)(mac_addr[5])) << 8));
1080
1081         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1082         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1083                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1084 }
1085
1086 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1087 {
1088         struct net_device *netdev = adapter->netdev;
1089         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1090         u32 rfctl;
1091         u32 data;
1092
1093         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1094         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1095                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1096         rfctl |= RFE_CTL_AB_;
1097         if (netdev->flags & IFF_PROMISC) {
1098                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1099         } else {
1100                 if (netdev->flags & IFF_ALLMULTI)
1101                         rfctl |= RFE_CTL_AM_;
1102         }
1103
1104         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1105         if (netdev_mc_count(netdev)) {
1106                 struct netdev_hw_addr *ha;
1107                 int i;
1108
1109                 rfctl |= RFE_CTL_DA_PERFECT_;
1110                 i = 1;
1111                 netdev_for_each_mc_addr(ha, netdev) {
1112                         /* set first 32 into Perfect Filter */
1113                         if (i < 33) {
1114                                 lan743x_csr_write(adapter,
1115                                                   RFE_ADDR_FILT_HI(i), 0);
1116                                 data = ha->addr[3];
1117                                 data = ha->addr[2] | (data << 8);
1118                                 data = ha->addr[1] | (data << 8);
1119                                 data = ha->addr[0] | (data << 8);
1120                                 lan743x_csr_write(adapter,
1121                                                   RFE_ADDR_FILT_LO(i), data);
1122                                 data = ha->addr[5];
1123                                 data = ha->addr[4] | (data << 8);
1124                                 data |= RFE_ADDR_FILT_HI_VALID_;
1125                                 lan743x_csr_write(adapter,
1126                                                   RFE_ADDR_FILT_HI(i), data);
1127                         } else {
1128                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1129                                              23) & 0x1FF;
1130                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1131                                 rfctl |= RFE_CTL_MCAST_HASH_;
1132                         }
1133                         i++;
1134                 }
1135         }
1136
1137         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1138                          DP_SEL_VHF_VLAN_LEN,
1139                          DP_SEL_VHF_HASH_LEN, hash_table);
1140         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1141 }
1142
1143 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1144 {
1145         u32 data = 0;
1146
1147         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1148         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1149                                  0, 1000, 20000, 100);
1150         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1151         case DMA_DESCRIPTOR_SPACING_16:
1152                 data = DMAC_CFG_MAX_DSPACE_16_;
1153                 break;
1154         case DMA_DESCRIPTOR_SPACING_32:
1155                 data = DMAC_CFG_MAX_DSPACE_32_;
1156                 break;
1157         case DMA_DESCRIPTOR_SPACING_64:
1158                 data = DMAC_CFG_MAX_DSPACE_64_;
1159                 break;
1160         case DMA_DESCRIPTOR_SPACING_128:
1161                 data = DMAC_CFG_MAX_DSPACE_128_;
1162                 break;
1163         default:
1164                 return -EPERM;
1165         }
1166         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1167                 data |= DMAC_CFG_COAL_EN_;
1168         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1169         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1170         lan743x_csr_write(adapter, DMAC_CFG, data);
1171         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1172         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1173         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1174         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1175         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1176         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1177         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1178         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1179         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1180         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1181         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1182         return 0;
1183 }
1184
1185 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1186                                      int tx_channel)
1187 {
1188         u32 dmac_cmd = 0;
1189
1190         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1191         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1192                                       DMAC_CMD_START_T_(tx_channel)),
1193                                       (dmac_cmd &
1194                                       DMAC_CMD_STOP_T_(tx_channel)));
1195 }
1196
1197 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1198                                              int tx_channel)
1199 {
1200         int timeout = 100;
1201         int result = 0;
1202
1203         while (timeout &&
1204                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1205                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1206                 usleep_range(1000, 20000);
1207                 timeout--;
1208         }
1209         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1210                 result = -ENODEV;
1211         return result;
1212 }
1213
1214 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1215                                      int rx_channel)
1216 {
1217         u32 dmac_cmd = 0;
1218
1219         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1220         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1221                                       DMAC_CMD_START_R_(rx_channel)),
1222                                       (dmac_cmd &
1223                                       DMAC_CMD_STOP_R_(rx_channel)));
1224 }
1225
1226 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1227                                              int rx_channel)
1228 {
1229         int timeout = 100;
1230         int result = 0;
1231
1232         while (timeout &&
1233                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1234                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1235                 usleep_range(1000, 20000);
1236                 timeout--;
1237         }
1238         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1239                 result = -ENODEV;
1240         return result;
1241 }
1242
1243 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1244                                     int descriptor_index, bool cleanup)
1245 {
1246         struct lan743x_tx_buffer_info *buffer_info = NULL;
1247         struct lan743x_tx_descriptor *descriptor = NULL;
1248         u32 descriptor_type = 0;
1249         bool ignore_sync;
1250
1251         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1252         buffer_info = &tx->buffer_info[descriptor_index];
1253         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1254                 goto done;
1255
1256         descriptor_type = le32_to_cpu(descriptor->data0) &
1257                           TX_DESC_DATA0_DTYPE_MASK_;
1258         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1259                 goto clean_up_data_descriptor;
1260         else
1261                 goto clear_active;
1262
1263 clean_up_data_descriptor:
1264         if (buffer_info->dma_ptr) {
1265                 if (buffer_info->flags &
1266                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1267                         dma_unmap_page(&tx->adapter->pdev->dev,
1268                                        buffer_info->dma_ptr,
1269                                        buffer_info->buffer_length,
1270                                        DMA_TO_DEVICE);
1271                 } else {
1272                         dma_unmap_single(&tx->adapter->pdev->dev,
1273                                          buffer_info->dma_ptr,
1274                                          buffer_info->buffer_length,
1275                                          DMA_TO_DEVICE);
1276                 }
1277                 buffer_info->dma_ptr = 0;
1278                 buffer_info->buffer_length = 0;
1279         }
1280         if (!buffer_info->skb)
1281                 goto clear_active;
1282
1283         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1284                 dev_kfree_skb_any(buffer_info->skb);
1285                 goto clear_skb;
1286         }
1287
1288         if (cleanup) {
1289                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1290                 dev_kfree_skb_any(buffer_info->skb);
1291         } else {
1292                 ignore_sync = (buffer_info->flags &
1293                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1294                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1295                                              buffer_info->skb, ignore_sync);
1296         }
1297
1298 clear_skb:
1299         buffer_info->skb = NULL;
1300
1301 clear_active:
1302         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1303
1304 done:
1305         memset(buffer_info, 0, sizeof(*buffer_info));
1306         memset(descriptor, 0, sizeof(*descriptor));
1307 }
1308
1309 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1310 {
1311         return ((++index) % tx->ring_size);
1312 }
1313
1314 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1315 {
1316         while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1317                 lan743x_tx_release_desc(tx, tx->last_head, false);
1318                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1319         }
1320 }
1321
1322 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1323 {
1324         u32 original_head = 0;
1325
1326         original_head = tx->last_head;
1327         do {
1328                 lan743x_tx_release_desc(tx, tx->last_head, true);
1329                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1330         } while (tx->last_head != original_head);
1331         memset(tx->ring_cpu_ptr, 0,
1332                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1333         memset(tx->buffer_info, 0,
1334                sizeof(*tx->buffer_info) * (tx->ring_size));
1335 }
1336
1337 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1338                                    struct sk_buff *skb)
1339 {
1340         int result = 1; /* 1 for the main skb buffer */
1341         int nr_frags = 0;
1342
1343         if (skb_is_gso(skb))
1344                 result++; /* requires an extension descriptor */
1345         nr_frags = skb_shinfo(skb)->nr_frags;
1346         result += nr_frags; /* 1 for each fragment buffer */
1347         return result;
1348 }
1349
1350 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1351 {
1352         int last_head = tx->last_head;
1353         int last_tail = tx->last_tail;
1354
1355         if (last_tail >= last_head)
1356                 return tx->ring_size - last_tail + last_head - 1;
1357         else
1358                 return last_head - last_tail - 1;
1359 }
1360
1361 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1362                                       bool enable_timestamping,
1363                                       bool enable_onestep_sync)
1364 {
1365         if (enable_timestamping)
1366                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1367         else
1368                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1369         if (enable_onestep_sync)
1370                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1371         else
1372                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1373 }
1374
1375 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1376                                   unsigned char *first_buffer,
1377                                   unsigned int first_buffer_length,
1378                                   unsigned int frame_length,
1379                                   bool time_stamp,
1380                                   bool check_sum)
1381 {
1382         /* called only from within lan743x_tx_xmit_frame.
1383          * assuming tx->ring_lock has already been acquired.
1384          */
1385         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1386         struct lan743x_tx_buffer_info *buffer_info = NULL;
1387         struct lan743x_adapter *adapter = tx->adapter;
1388         struct device *dev = &adapter->pdev->dev;
1389         dma_addr_t dma_ptr;
1390
1391         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1392         tx->frame_first = tx->last_tail;
1393         tx->frame_tail = tx->frame_first;
1394
1395         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1396         buffer_info = &tx->buffer_info[tx->frame_tail];
1397         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1398                                  DMA_TO_DEVICE);
1399         if (dma_mapping_error(dev, dma_ptr))
1400                 return -ENOMEM;
1401
1402         tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1403         tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1404         tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1405                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1406
1407         buffer_info->skb = NULL;
1408         buffer_info->dma_ptr = dma_ptr;
1409         buffer_info->buffer_length = first_buffer_length;
1410         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1411
1412         tx->frame_data0 = (first_buffer_length &
1413                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1414                 TX_DESC_DATA0_DTYPE_DATA_ |
1415                 TX_DESC_DATA0_FS_ |
1416                 TX_DESC_DATA0_FCS_;
1417         if (time_stamp)
1418                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1419
1420         if (check_sum)
1421                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1422                                    TX_DESC_DATA0_IPE_ |
1423                                    TX_DESC_DATA0_TPE_;
1424
1425         /* data0 will be programmed in one of other frame assembler functions */
1426         return 0;
1427 }
1428
1429 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1430                                      unsigned int frame_length,
1431                                      int nr_frags)
1432 {
1433         /* called only from within lan743x_tx_xmit_frame.
1434          * assuming tx->ring_lock has already been acquired.
1435          */
1436         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1437         struct lan743x_tx_buffer_info *buffer_info = NULL;
1438
1439         /* wrap up previous descriptor */
1440         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1441         if (nr_frags <= 0) {
1442                 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1443                 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1444         }
1445         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1446         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1447
1448         /* move to next descriptor */
1449         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1450         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1451         buffer_info = &tx->buffer_info[tx->frame_tail];
1452
1453         /* add extension descriptor */
1454         tx_descriptor->data1 = 0;
1455         tx_descriptor->data2 = 0;
1456         tx_descriptor->data3 = 0;
1457
1458         buffer_info->skb = NULL;
1459         buffer_info->dma_ptr = 0;
1460         buffer_info->buffer_length = 0;
1461         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1462
1463         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1464                           TX_DESC_DATA0_DTYPE_EXT_ |
1465                           TX_DESC_DATA0_EXT_LSO_;
1466
1467         /* data0 will be programmed in one of other frame assembler functions */
1468 }
1469
1470 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1471                                          const skb_frag_t *fragment,
1472                                          unsigned int frame_length)
1473 {
1474         /* called only from within lan743x_tx_xmit_frame
1475          * assuming tx->ring_lock has already been acquired
1476          */
1477         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1478         struct lan743x_tx_buffer_info *buffer_info = NULL;
1479         struct lan743x_adapter *adapter = tx->adapter;
1480         struct device *dev = &adapter->pdev->dev;
1481         unsigned int fragment_length = 0;
1482         dma_addr_t dma_ptr;
1483
1484         fragment_length = skb_frag_size(fragment);
1485         if (!fragment_length)
1486                 return 0;
1487
1488         /* wrap up previous descriptor */
1489         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1490         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1491
1492         /* move to next descriptor */
1493         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1494         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1495         buffer_info = &tx->buffer_info[tx->frame_tail];
1496         dma_ptr = skb_frag_dma_map(dev, fragment,
1497                                    0, fragment_length,
1498                                    DMA_TO_DEVICE);
1499         if (dma_mapping_error(dev, dma_ptr)) {
1500                 int desc_index;
1501
1502                 /* cleanup all previously setup descriptors */
1503                 desc_index = tx->frame_first;
1504                 while (desc_index != tx->frame_tail) {
1505                         lan743x_tx_release_desc(tx, desc_index, true);
1506                         desc_index = lan743x_tx_next_index(tx, desc_index);
1507                 }
1508                 dma_wmb();
1509                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1510                 tx->frame_first = 0;
1511                 tx->frame_data0 = 0;
1512                 tx->frame_tail = 0;
1513                 return -ENOMEM;
1514         }
1515
1516         tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1517         tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1518         tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1519                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1520
1521         buffer_info->skb = NULL;
1522         buffer_info->dma_ptr = dma_ptr;
1523         buffer_info->buffer_length = fragment_length;
1524         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1525         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1526
1527         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1528                           TX_DESC_DATA0_DTYPE_DATA_ |
1529                           TX_DESC_DATA0_FCS_;
1530
1531         /* data0 will be programmed in one of other frame assembler functions */
1532         return 0;
1533 }
1534
1535 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1536                                  struct sk_buff *skb,
1537                                  bool time_stamp,
1538                                  bool ignore_sync)
1539 {
1540         /* called only from within lan743x_tx_xmit_frame
1541          * assuming tx->ring_lock has already been acquired
1542          */
1543         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1544         struct lan743x_tx_buffer_info *buffer_info = NULL;
1545         struct lan743x_adapter *adapter = tx->adapter;
1546         u32 tx_tail_flags = 0;
1547
1548         /* wrap up previous descriptor */
1549         if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1550             TX_DESC_DATA0_DTYPE_DATA_) {
1551                 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1552                 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1553         }
1554
1555         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1556         buffer_info = &tx->buffer_info[tx->frame_tail];
1557         buffer_info->skb = skb;
1558         if (time_stamp)
1559                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1560         if (ignore_sync)
1561                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1562
1563         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1564         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1565         tx->last_tail = tx->frame_tail;
1566
1567         dma_wmb();
1568
1569         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1570                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1571         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1572                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1573                 TX_TAIL_SET_TOP_INT_EN_;
1574
1575         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1576                           tx_tail_flags | tx->frame_tail);
1577         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1578 }
1579
1580 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1581                                          struct sk_buff *skb)
1582 {
1583         int required_number_of_descriptors = 0;
1584         unsigned int start_frame_length = 0;
1585         unsigned int frame_length = 0;
1586         unsigned int head_length = 0;
1587         unsigned long irq_flags = 0;
1588         bool do_timestamp = false;
1589         bool ignore_sync = false;
1590         int nr_frags = 0;
1591         bool gso = false;
1592         int j;
1593
1594         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1595
1596         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1597         if (required_number_of_descriptors >
1598                 lan743x_tx_get_avail_desc(tx)) {
1599                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1600                         dev_kfree_skb_irq(skb);
1601                 } else {
1602                         /* save to overflow buffer */
1603                         tx->overflow_skb = skb;
1604                         netif_stop_queue(tx->adapter->netdev);
1605                 }
1606                 goto unlock;
1607         }
1608
1609         /* space available, transmit skb  */
1610         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1611             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1612             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1613                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1614                 do_timestamp = true;
1615                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1616                         ignore_sync = true;
1617         }
1618         head_length = skb_headlen(skb);
1619         frame_length = skb_pagelen(skb);
1620         nr_frags = skb_shinfo(skb)->nr_frags;
1621         start_frame_length = frame_length;
1622         gso = skb_is_gso(skb);
1623         if (gso) {
1624                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1625                                          (unsigned short)8);
1626         }
1627
1628         if (lan743x_tx_frame_start(tx,
1629                                    skb->data, head_length,
1630                                    start_frame_length,
1631                                    do_timestamp,
1632                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1633                 dev_kfree_skb_irq(skb);
1634                 goto unlock;
1635         }
1636
1637         if (gso)
1638                 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1639
1640         if (nr_frags <= 0)
1641                 goto finish;
1642
1643         for (j = 0; j < nr_frags; j++) {
1644                 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1645
1646                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1647                         /* upon error no need to call
1648                          *      lan743x_tx_frame_end
1649                          * frame assembler clean up was performed inside
1650                          *      lan743x_tx_frame_add_fragment
1651                          */
1652                         dev_kfree_skb_irq(skb);
1653                         goto unlock;
1654                 }
1655         }
1656
1657 finish:
1658         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1659
1660 unlock:
1661         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1662         return NETDEV_TX_OK;
1663 }
1664
1665 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1666 {
1667         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1668         struct lan743x_adapter *adapter = tx->adapter;
1669         bool start_transmitter = false;
1670         unsigned long irq_flags = 0;
1671         u32 ioc_bit = 0;
1672
1673         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1674         lan743x_csr_read(adapter, DMAC_INT_STS);
1675         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1676                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1677         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1678
1679         /* clean up tx ring */
1680         lan743x_tx_release_completed_descriptors(tx);
1681         if (netif_queue_stopped(adapter->netdev)) {
1682                 if (tx->overflow_skb) {
1683                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1684                                 lan743x_tx_get_avail_desc(tx))
1685                                 start_transmitter = true;
1686                 } else {
1687                         netif_wake_queue(adapter->netdev);
1688                 }
1689         }
1690         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1691
1692         if (start_transmitter) {
1693                 /* space is now available, transmit overflow skb */
1694                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1695                 tx->overflow_skb = NULL;
1696                 netif_wake_queue(adapter->netdev);
1697         }
1698
1699         if (!napi_complete(napi))
1700                 goto done;
1701
1702         /* enable isr */
1703         lan743x_csr_write(adapter, INT_EN_SET,
1704                           INT_BIT_DMA_TX_(tx->channel_number));
1705         lan743x_csr_read(adapter, INT_STS);
1706
1707 done:
1708         return 0;
1709 }
1710
1711 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1712 {
1713         if (tx->head_cpu_ptr) {
1714                 dma_free_coherent(&tx->adapter->pdev->dev,
1715                                   sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1716                                   tx->head_dma_ptr);
1717                 tx->head_cpu_ptr = NULL;
1718                 tx->head_dma_ptr = 0;
1719         }
1720         kfree(tx->buffer_info);
1721         tx->buffer_info = NULL;
1722
1723         if (tx->ring_cpu_ptr) {
1724                 dma_free_coherent(&tx->adapter->pdev->dev,
1725                                   tx->ring_allocation_size, tx->ring_cpu_ptr,
1726                                   tx->ring_dma_ptr);
1727                 tx->ring_allocation_size = 0;
1728                 tx->ring_cpu_ptr = NULL;
1729                 tx->ring_dma_ptr = 0;
1730         }
1731         tx->ring_size = 0;
1732 }
1733
1734 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1735 {
1736         size_t ring_allocation_size = 0;
1737         void *cpu_ptr = NULL;
1738         dma_addr_t dma_ptr;
1739         int ret = -ENOMEM;
1740
1741         tx->ring_size = LAN743X_TX_RING_SIZE;
1742         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1743                 ret = -EINVAL;
1744                 goto cleanup;
1745         }
1746         ring_allocation_size = ALIGN(tx->ring_size *
1747                                      sizeof(struct lan743x_tx_descriptor),
1748                                      PAGE_SIZE);
1749         dma_ptr = 0;
1750         cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1751                                      ring_allocation_size, &dma_ptr, GFP_KERNEL);
1752         if (!cpu_ptr) {
1753                 ret = -ENOMEM;
1754                 goto cleanup;
1755         }
1756
1757         tx->ring_allocation_size = ring_allocation_size;
1758         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1759         tx->ring_dma_ptr = dma_ptr;
1760
1761         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1762         if (!cpu_ptr) {
1763                 ret = -ENOMEM;
1764                 goto cleanup;
1765         }
1766         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1767         dma_ptr = 0;
1768         cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1769                                      sizeof(*tx->head_cpu_ptr), &dma_ptr,
1770                                      GFP_KERNEL);
1771         if (!cpu_ptr) {
1772                 ret = -ENOMEM;
1773                 goto cleanup;
1774         }
1775
1776         tx->head_cpu_ptr = cpu_ptr;
1777         tx->head_dma_ptr = dma_ptr;
1778         if (tx->head_dma_ptr & 0x3) {
1779                 ret = -ENOMEM;
1780                 goto cleanup;
1781         }
1782
1783         return 0;
1784
1785 cleanup:
1786         lan743x_tx_ring_cleanup(tx);
1787         return ret;
1788 }
1789
1790 static void lan743x_tx_close(struct lan743x_tx *tx)
1791 {
1792         struct lan743x_adapter *adapter = tx->adapter;
1793
1794         lan743x_csr_write(adapter,
1795                           DMAC_CMD,
1796                           DMAC_CMD_STOP_T_(tx->channel_number));
1797         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1798
1799         lan743x_csr_write(adapter,
1800                           DMAC_INT_EN_CLR,
1801                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1802         lan743x_csr_write(adapter, INT_EN_CLR,
1803                           INT_BIT_DMA_TX_(tx->channel_number));
1804         napi_disable(&tx->napi);
1805         netif_napi_del(&tx->napi);
1806
1807         lan743x_csr_write(adapter, FCT_TX_CTL,
1808                           FCT_TX_CTL_DIS_(tx->channel_number));
1809         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1810                                  FCT_TX_CTL_EN_(tx->channel_number),
1811                                  0, 1000, 20000, 100);
1812
1813         lan743x_tx_release_all_descriptors(tx);
1814
1815         if (tx->overflow_skb) {
1816                 dev_kfree_skb(tx->overflow_skb);
1817                 tx->overflow_skb = NULL;
1818         }
1819
1820         lan743x_tx_ring_cleanup(tx);
1821 }
1822
1823 static int lan743x_tx_open(struct lan743x_tx *tx)
1824 {
1825         struct lan743x_adapter *adapter = NULL;
1826         u32 data = 0;
1827         int ret;
1828
1829         adapter = tx->adapter;
1830         ret = lan743x_tx_ring_init(tx);
1831         if (ret)
1832                 return ret;
1833
1834         /* initialize fifo */
1835         lan743x_csr_write(adapter, FCT_TX_CTL,
1836                           FCT_TX_CTL_RESET_(tx->channel_number));
1837         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1838                                  FCT_TX_CTL_RESET_(tx->channel_number),
1839                                  0, 1000, 20000, 100);
1840
1841         /* enable fifo */
1842         lan743x_csr_write(adapter, FCT_TX_CTL,
1843                           FCT_TX_CTL_EN_(tx->channel_number));
1844
1845         /* reset tx channel */
1846         lan743x_csr_write(adapter, DMAC_CMD,
1847                           DMAC_CMD_TX_SWR_(tx->channel_number));
1848         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1849                                  DMAC_CMD_TX_SWR_(tx->channel_number),
1850                                  0, 1000, 20000, 100);
1851
1852         /* Write TX_BASE_ADDR */
1853         lan743x_csr_write(adapter,
1854                           TX_BASE_ADDRH(tx->channel_number),
1855                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1856         lan743x_csr_write(adapter,
1857                           TX_BASE_ADDRL(tx->channel_number),
1858                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
1859
1860         /* Write TX_CFG_B */
1861         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1862         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1863         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1864         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1865                 data |= TX_CFG_B_TDMABL_512_;
1866         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1867
1868         /* Write TX_CFG_A */
1869         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1870         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1871                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1872                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1873                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1874                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1875         }
1876         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1877
1878         /* Write TX_HEAD_WRITEBACK_ADDR */
1879         lan743x_csr_write(adapter,
1880                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1881                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
1882         lan743x_csr_write(adapter,
1883                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1884                           DMA_ADDR_LOW32(tx->head_dma_ptr));
1885
1886         /* set last head */
1887         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1888
1889         /* write TX_TAIL */
1890         tx->last_tail = 0;
1891         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1892                           (u32)(tx->last_tail));
1893         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1894                                                          INT_BIT_DMA_TX_
1895                                                          (tx->channel_number));
1896         netif_tx_napi_add(adapter->netdev,
1897                           &tx->napi, lan743x_tx_napi_poll,
1898                           tx->ring_size - 1);
1899         napi_enable(&tx->napi);
1900
1901         data = 0;
1902         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1903                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1904         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1905                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1906         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1907                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1908         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1909                 data |= TX_CFG_C_TX_INT_EN_R2C_;
1910         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1911
1912         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1913                 lan743x_csr_write(adapter, INT_EN_SET,
1914                                   INT_BIT_DMA_TX_(tx->channel_number));
1915         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1916                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1917
1918         /*  start dmac channel */
1919         lan743x_csr_write(adapter, DMAC_CMD,
1920                           DMAC_CMD_START_T_(tx->channel_number));
1921         return 0;
1922 }
1923
1924 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1925 {
1926         return ((++index) % rx->ring_size);
1927 }
1928
1929 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
1930 {
1931         /* update the tail once per 8 descriptors */
1932         if ((index & 7) == 7)
1933                 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
1934                                   index);
1935 }
1936
1937 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index)
1938 {
1939         struct net_device *netdev = rx->adapter->netdev;
1940         struct device *dev = &rx->adapter->pdev->dev;
1941         struct lan743x_rx_buffer_info *buffer_info;
1942         unsigned int buffer_length, used_length;
1943         struct lan743x_rx_descriptor *descriptor;
1944         struct sk_buff *skb;
1945         dma_addr_t dma_ptr;
1946
1947         buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
1948
1949         descriptor = &rx->ring_cpu_ptr[index];
1950         buffer_info = &rx->buffer_info[index];
1951         skb = __netdev_alloc_skb(netdev, buffer_length, GFP_ATOMIC | GFP_DMA);
1952         if (!skb)
1953                 return -ENOMEM;
1954         dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
1955         if (dma_mapping_error(dev, dma_ptr)) {
1956                 dev_kfree_skb_any(skb);
1957                 return -ENOMEM;
1958         }
1959         if (buffer_info->dma_ptr) {
1960                 /* sync used area of buffer only */
1961                 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
1962                         /* frame length is valid only if LS bit is set.
1963                          * it's a safe upper bound for the used area in this
1964                          * buffer.
1965                          */
1966                         used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
1967                                           (le32_to_cpu(descriptor->data0)),
1968                                           buffer_info->buffer_length);
1969                 else
1970                         used_length = buffer_info->buffer_length;
1971                 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
1972                                         used_length,
1973                                         DMA_FROM_DEVICE);
1974                 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
1975                                        buffer_info->buffer_length,
1976                                        DMA_FROM_DEVICE,
1977                                        DMA_ATTR_SKIP_CPU_SYNC);
1978         }
1979
1980         buffer_info->skb = skb;
1981         buffer_info->dma_ptr = dma_ptr;
1982         buffer_info->buffer_length = buffer_length;
1983         descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
1984         descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
1985         descriptor->data3 = 0;
1986         descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
1987                             (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
1988         lan743x_rx_update_tail(rx, index);
1989
1990         return 0;
1991 }
1992
1993 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1994 {
1995         struct lan743x_rx_buffer_info *buffer_info;
1996         struct lan743x_rx_descriptor *descriptor;
1997
1998         descriptor = &rx->ring_cpu_ptr[index];
1999         buffer_info = &rx->buffer_info[index];
2000
2001         descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2002         descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2003         descriptor->data3 = 0;
2004         descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2005                             ((buffer_info->buffer_length) &
2006                             RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2007         lan743x_rx_update_tail(rx, index);
2008 }
2009
2010 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2011 {
2012         struct lan743x_rx_buffer_info *buffer_info;
2013         struct lan743x_rx_descriptor *descriptor;
2014
2015         descriptor = &rx->ring_cpu_ptr[index];
2016         buffer_info = &rx->buffer_info[index];
2017
2018         memset(descriptor, 0, sizeof(*descriptor));
2019
2020         if (buffer_info->dma_ptr) {
2021                 dma_unmap_single(&rx->adapter->pdev->dev,
2022                                  buffer_info->dma_ptr,
2023                                  buffer_info->buffer_length,
2024                                  DMA_FROM_DEVICE);
2025                 buffer_info->dma_ptr = 0;
2026         }
2027
2028         if (buffer_info->skb) {
2029                 dev_kfree_skb(buffer_info->skb);
2030                 buffer_info->skb = NULL;
2031         }
2032
2033         memset(buffer_info, 0, sizeof(*buffer_info));
2034 }
2035
2036 static struct sk_buff *
2037 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2038 {
2039         if (skb_linearize(skb)) {
2040                 dev_kfree_skb_irq(skb);
2041                 return NULL;
2042         }
2043         frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2044         if (skb->len > frame_length) {
2045                 skb->tail -= skb->len - frame_length;
2046                 skb->len = frame_length;
2047         }
2048         return skb;
2049 }
2050
2051 static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2052 {
2053         int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2054         struct lan743x_rx_descriptor *descriptor, *desc_ext;
2055         struct net_device *netdev = rx->adapter->netdev;
2056         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2057         struct lan743x_rx_buffer_info *buffer_info;
2058         int frame_length, buffer_length;
2059         int extension_index = -1;
2060         bool is_last, is_first;
2061         struct sk_buff *skb;
2062
2063         if (current_head_index < 0 || current_head_index >= rx->ring_size)
2064                 goto done;
2065
2066         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2067                 goto done;
2068
2069         if (rx->last_head == current_head_index)
2070                 goto done;
2071
2072         descriptor = &rx->ring_cpu_ptr[rx->last_head];
2073         if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2074                 goto done;
2075         buffer_info = &rx->buffer_info[rx->last_head];
2076
2077         is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2078         is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2079
2080         if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2081                 /* extension is expected to follow */
2082                 int index = lan743x_rx_next_index(rx, rx->last_head);
2083
2084                 if (index == current_head_index)
2085                         /* extension not yet available */
2086                         goto done;
2087                 desc_ext = &rx->ring_cpu_ptr[index];
2088                 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2089                         /* extension not yet available */
2090                         goto done;
2091                 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2092                         goto move_forward;
2093                 extension_index = index;
2094         }
2095
2096         /* Only the last buffer in a multi-buffer frame contains the total frame
2097          * length. The chip occasionally sends more buffers than strictly
2098          * required to reach the total frame length.
2099          * Handle this by adding all buffers to the skb in their entirety.
2100          * Once the real frame length is known, trim the skb.
2101          */
2102         frame_length =
2103                 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2104         buffer_length = buffer_info->buffer_length;
2105
2106         netdev_dbg(netdev, "%s%schunk: %d/%d",
2107                    is_first ? "first " : "      ",
2108                    is_last  ? "last  " : "      ",
2109                    frame_length, buffer_length);
2110
2111         /* save existing skb, allocate new skb and map to dma */
2112         skb = buffer_info->skb;
2113         if (lan743x_rx_init_ring_element(rx, rx->last_head)) {
2114                 /* failed to allocate next skb.
2115                  * Memory is very low.
2116                  * Drop this packet and reuse buffer.
2117                  */
2118                 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2119                 /* drop packet that was being assembled */
2120                 dev_kfree_skb_irq(rx->skb_head);
2121                 rx->skb_head = NULL;
2122                 goto process_extension;
2123         }
2124
2125         /* add buffers to skb via skb->frag_list */
2126         if (is_first) {
2127                 skb_reserve(skb, RX_HEAD_PADDING);
2128                 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2129                 if (rx->skb_head)
2130                         dev_kfree_skb_irq(rx->skb_head);
2131                 rx->skb_head = skb;
2132         } else if (rx->skb_head) {
2133                 skb_put(skb, buffer_length);
2134                 if (skb_shinfo(rx->skb_head)->frag_list)
2135                         rx->skb_tail->next = skb;
2136                 else
2137                         skb_shinfo(rx->skb_head)->frag_list = skb;
2138                 rx->skb_tail = skb;
2139                 rx->skb_head->len += skb->len;
2140                 rx->skb_head->data_len += skb->len;
2141                 rx->skb_head->truesize += skb->truesize;
2142         } else {
2143                 /* packet to assemble has already been dropped because one or
2144                  * more of its buffers could not be allocated
2145                  */
2146                 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2147                 dev_kfree_skb_irq(skb);
2148         }
2149
2150 process_extension:
2151         if (extension_index >= 0) {
2152                 u32 ts_sec;
2153                 u32 ts_nsec;
2154
2155                 ts_sec = le32_to_cpu(desc_ext->data1);
2156                 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2157                           RX_DESC_DATA2_TS_NS_MASK_);
2158                 if (rx->skb_head)
2159                         skb_hwtstamps(rx->skb_head)->hwtstamp =
2160                                 ktime_set(ts_sec, ts_nsec);
2161                 lan743x_rx_reuse_ring_element(rx, extension_index);
2162                 rx->last_head = extension_index;
2163                 netdev_dbg(netdev, "process extension");
2164         }
2165
2166         if (is_last && rx->skb_head)
2167                 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2168
2169         if (is_last && rx->skb_head) {
2170                 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2171                                                         rx->adapter->netdev);
2172                 netdev_dbg(netdev, "sending %d byte frame to OS",
2173                            rx->skb_head->len);
2174                 napi_gro_receive(&rx->napi, rx->skb_head);
2175                 rx->skb_head = NULL;
2176         }
2177
2178 move_forward:
2179         /* push tail and head forward */
2180         rx->last_tail = rx->last_head;
2181         rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2182         result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2183 done:
2184         return result;
2185 }
2186
2187 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2188 {
2189         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2190         struct lan743x_adapter *adapter = rx->adapter;
2191         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2192         u32 rx_tail_flags = 0;
2193         int count;
2194
2195         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2196                 /* clear int status bit before reading packet */
2197                 lan743x_csr_write(adapter, DMAC_INT_STS,
2198                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2199         }
2200         for (count = 0; count < weight; count++) {
2201                 result = lan743x_rx_process_buffer(rx);
2202                 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2203                         break;
2204         }
2205         rx->frame_count += count;
2206         if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2207                 return weight;
2208
2209         if (!napi_complete_done(napi, count))
2210                 return count;
2211
2212         /* re-arm interrupts, must write to rx tail on some chip variants */
2213         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2214                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2215         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2216                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2217         } else {
2218                 lan743x_csr_write(adapter, INT_EN_SET,
2219                                   INT_BIT_DMA_RX_(rx->channel_number));
2220         }
2221
2222         if (rx_tail_flags)
2223                 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2224                                   rx_tail_flags | rx->last_tail);
2225
2226         return count;
2227 }
2228
2229 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2230 {
2231         if (rx->buffer_info && rx->ring_cpu_ptr) {
2232                 int index;
2233
2234                 for (index = 0; index < rx->ring_size; index++)
2235                         lan743x_rx_release_ring_element(rx, index);
2236         }
2237
2238         if (rx->head_cpu_ptr) {
2239                 dma_free_coherent(&rx->adapter->pdev->dev,
2240                                   sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2241                                   rx->head_dma_ptr);
2242                 rx->head_cpu_ptr = NULL;
2243                 rx->head_dma_ptr = 0;
2244         }
2245
2246         kfree(rx->buffer_info);
2247         rx->buffer_info = NULL;
2248
2249         if (rx->ring_cpu_ptr) {
2250                 dma_free_coherent(&rx->adapter->pdev->dev,
2251                                   rx->ring_allocation_size, rx->ring_cpu_ptr,
2252                                   rx->ring_dma_ptr);
2253                 rx->ring_allocation_size = 0;
2254                 rx->ring_cpu_ptr = NULL;
2255                 rx->ring_dma_ptr = 0;
2256         }
2257
2258         rx->ring_size = 0;
2259         rx->last_head = 0;
2260 }
2261
2262 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2263 {
2264         size_t ring_allocation_size = 0;
2265         dma_addr_t dma_ptr = 0;
2266         void *cpu_ptr = NULL;
2267         int ret = -ENOMEM;
2268         int index = 0;
2269
2270         rx->ring_size = LAN743X_RX_RING_SIZE;
2271         if (rx->ring_size <= 1) {
2272                 ret = -EINVAL;
2273                 goto cleanup;
2274         }
2275         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2276                 ret = -EINVAL;
2277                 goto cleanup;
2278         }
2279         ring_allocation_size = ALIGN(rx->ring_size *
2280                                      sizeof(struct lan743x_rx_descriptor),
2281                                      PAGE_SIZE);
2282         dma_ptr = 0;
2283         cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2284                                      ring_allocation_size, &dma_ptr, GFP_KERNEL);
2285         if (!cpu_ptr) {
2286                 ret = -ENOMEM;
2287                 goto cleanup;
2288         }
2289         rx->ring_allocation_size = ring_allocation_size;
2290         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2291         rx->ring_dma_ptr = dma_ptr;
2292
2293         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2294                           GFP_KERNEL);
2295         if (!cpu_ptr) {
2296                 ret = -ENOMEM;
2297                 goto cleanup;
2298         }
2299         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2300         dma_ptr = 0;
2301         cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2302                                      sizeof(*rx->head_cpu_ptr), &dma_ptr,
2303                                      GFP_KERNEL);
2304         if (!cpu_ptr) {
2305                 ret = -ENOMEM;
2306                 goto cleanup;
2307         }
2308
2309         rx->head_cpu_ptr = cpu_ptr;
2310         rx->head_dma_ptr = dma_ptr;
2311         if (rx->head_dma_ptr & 0x3) {
2312                 ret = -ENOMEM;
2313                 goto cleanup;
2314         }
2315
2316         rx->last_head = 0;
2317         for (index = 0; index < rx->ring_size; index++) {
2318                 ret = lan743x_rx_init_ring_element(rx, index);
2319                 if (ret)
2320                         goto cleanup;
2321         }
2322         return 0;
2323
2324 cleanup:
2325         lan743x_rx_ring_cleanup(rx);
2326         return ret;
2327 }
2328
2329 static void lan743x_rx_close(struct lan743x_rx *rx)
2330 {
2331         struct lan743x_adapter *adapter = rx->adapter;
2332
2333         lan743x_csr_write(adapter, FCT_RX_CTL,
2334                           FCT_RX_CTL_DIS_(rx->channel_number));
2335         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2336                                  FCT_RX_CTL_EN_(rx->channel_number),
2337                                  0, 1000, 20000, 100);
2338
2339         lan743x_csr_write(adapter, DMAC_CMD,
2340                           DMAC_CMD_STOP_R_(rx->channel_number));
2341         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2342
2343         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2344                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2345         lan743x_csr_write(adapter, INT_EN_CLR,
2346                           INT_BIT_DMA_RX_(rx->channel_number));
2347         napi_disable(&rx->napi);
2348
2349         netif_napi_del(&rx->napi);
2350
2351         lan743x_rx_ring_cleanup(rx);
2352 }
2353
2354 static int lan743x_rx_open(struct lan743x_rx *rx)
2355 {
2356         struct lan743x_adapter *adapter = rx->adapter;
2357         u32 data = 0;
2358         int ret;
2359
2360         rx->frame_count = 0;
2361         ret = lan743x_rx_ring_init(rx);
2362         if (ret)
2363                 goto return_error;
2364
2365         netif_napi_add(adapter->netdev,
2366                        &rx->napi, lan743x_rx_napi_poll,
2367                        NAPI_POLL_WEIGHT);
2368
2369         lan743x_csr_write(adapter, DMAC_CMD,
2370                           DMAC_CMD_RX_SWR_(rx->channel_number));
2371         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2372                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2373                                  0, 1000, 20000, 100);
2374
2375         /* set ring base address */
2376         lan743x_csr_write(adapter,
2377                           RX_BASE_ADDRH(rx->channel_number),
2378                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2379         lan743x_csr_write(adapter,
2380                           RX_BASE_ADDRL(rx->channel_number),
2381                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2382
2383         /* set rx write back address */
2384         lan743x_csr_write(adapter,
2385                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2386                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2387         lan743x_csr_write(adapter,
2388                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2389                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2390         data = RX_CFG_A_RX_HP_WB_EN_;
2391         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2392                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2393                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2394                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2395                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2396         }
2397
2398         /* set RX_CFG_A */
2399         lan743x_csr_write(adapter,
2400                           RX_CFG_A(rx->channel_number), data);
2401
2402         /* set RX_CFG_B */
2403         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2404         data &= ~RX_CFG_B_RX_PAD_MASK_;
2405         if (!RX_HEAD_PADDING)
2406                 data |= RX_CFG_B_RX_PAD_0_;
2407         else
2408                 data |= RX_CFG_B_RX_PAD_2_;
2409         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2410         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2411         data |= RX_CFG_B_TS_ALL_RX_;
2412         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2413                 data |= RX_CFG_B_RDMABL_512_;
2414
2415         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2416         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2417                                                          INT_BIT_DMA_RX_
2418                                                          (rx->channel_number));
2419
2420         /* set RX_CFG_C */
2421         data = 0;
2422         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2423                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2424         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2425                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2426         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2427                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2428         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2429                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2430         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2431
2432         rx->last_tail = ((u32)(rx->ring_size - 1));
2433         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2434                           rx->last_tail);
2435         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2436         if (rx->last_head) {
2437                 ret = -EIO;
2438                 goto napi_delete;
2439         }
2440
2441         napi_enable(&rx->napi);
2442
2443         lan743x_csr_write(adapter, INT_EN_SET,
2444                           INT_BIT_DMA_RX_(rx->channel_number));
2445         lan743x_csr_write(adapter, DMAC_INT_STS,
2446                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2447         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2448                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2449         lan743x_csr_write(adapter, DMAC_CMD,
2450                           DMAC_CMD_START_R_(rx->channel_number));
2451
2452         /* initialize fifo */
2453         lan743x_csr_write(adapter, FCT_RX_CTL,
2454                           FCT_RX_CTL_RESET_(rx->channel_number));
2455         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2456                                  FCT_RX_CTL_RESET_(rx->channel_number),
2457                                  0, 1000, 20000, 100);
2458         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2459                           FCT_FLOW_CTL_REQ_EN_ |
2460                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2461                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2462
2463         /* enable fifo */
2464         lan743x_csr_write(adapter, FCT_RX_CTL,
2465                           FCT_RX_CTL_EN_(rx->channel_number));
2466         return 0;
2467
2468 napi_delete:
2469         netif_napi_del(&rx->napi);
2470         lan743x_rx_ring_cleanup(rx);
2471
2472 return_error:
2473         return ret;
2474 }
2475
2476 static int lan743x_netdev_close(struct net_device *netdev)
2477 {
2478         struct lan743x_adapter *adapter = netdev_priv(netdev);
2479         int index;
2480
2481         lan743x_tx_close(&adapter->tx[0]);
2482
2483         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2484                 lan743x_rx_close(&adapter->rx[index]);
2485
2486         lan743x_ptp_close(adapter);
2487
2488         lan743x_phy_close(adapter);
2489
2490         lan743x_mac_close(adapter);
2491
2492         lan743x_intr_close(adapter);
2493
2494         return 0;
2495 }
2496
2497 static int lan743x_netdev_open(struct net_device *netdev)
2498 {
2499         struct lan743x_adapter *adapter = netdev_priv(netdev);
2500         int index;
2501         int ret;
2502
2503         ret = lan743x_intr_open(adapter);
2504         if (ret)
2505                 goto return_error;
2506
2507         ret = lan743x_mac_open(adapter);
2508         if (ret)
2509                 goto close_intr;
2510
2511         ret = lan743x_phy_open(adapter);
2512         if (ret)
2513                 goto close_mac;
2514
2515         ret = lan743x_ptp_open(adapter);
2516         if (ret)
2517                 goto close_phy;
2518
2519         lan743x_rfe_open(adapter);
2520
2521         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2522                 ret = lan743x_rx_open(&adapter->rx[index]);
2523                 if (ret)
2524                         goto close_rx;
2525         }
2526
2527         ret = lan743x_tx_open(&adapter->tx[0]);
2528         if (ret)
2529                 goto close_rx;
2530
2531         return 0;
2532
2533 close_rx:
2534         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2535                 if (adapter->rx[index].ring_cpu_ptr)
2536                         lan743x_rx_close(&adapter->rx[index]);
2537         }
2538         lan743x_ptp_close(adapter);
2539
2540 close_phy:
2541         lan743x_phy_close(adapter);
2542
2543 close_mac:
2544         lan743x_mac_close(adapter);
2545
2546 close_intr:
2547         lan743x_intr_close(adapter);
2548
2549 return_error:
2550         netif_warn(adapter, ifup, adapter->netdev,
2551                    "Error opening LAN743x\n");
2552         return ret;
2553 }
2554
2555 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2556                                              struct net_device *netdev)
2557 {
2558         struct lan743x_adapter *adapter = netdev_priv(netdev);
2559
2560         return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2561 }
2562
2563 static int lan743x_netdev_ioctl(struct net_device *netdev,
2564                                 struct ifreq *ifr, int cmd)
2565 {
2566         if (!netif_running(netdev))
2567                 return -EINVAL;
2568         if (cmd == SIOCSHWTSTAMP)
2569                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2570         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2571 }
2572
2573 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2574 {
2575         struct lan743x_adapter *adapter = netdev_priv(netdev);
2576
2577         lan743x_rfe_set_multicast(adapter);
2578 }
2579
2580 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2581 {
2582         struct lan743x_adapter *adapter = netdev_priv(netdev);
2583         int ret = 0;
2584
2585         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2586         if (!ret)
2587                 netdev->mtu = new_mtu;
2588         return ret;
2589 }
2590
2591 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2592                                        struct rtnl_link_stats64 *stats)
2593 {
2594         struct lan743x_adapter *adapter = netdev_priv(netdev);
2595
2596         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2597         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2598         stats->rx_bytes = lan743x_csr_read(adapter,
2599                                            STAT_RX_UNICAST_BYTE_COUNT) +
2600                           lan743x_csr_read(adapter,
2601                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2602                           lan743x_csr_read(adapter,
2603                                            STAT_RX_MULTICAST_BYTE_COUNT);
2604         stats->tx_bytes = lan743x_csr_read(adapter,
2605                                            STAT_TX_UNICAST_BYTE_COUNT) +
2606                           lan743x_csr_read(adapter,
2607                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2608                           lan743x_csr_read(adapter,
2609                                            STAT_TX_MULTICAST_BYTE_COUNT);
2610         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2611                            lan743x_csr_read(adapter,
2612                                             STAT_RX_ALIGNMENT_ERRORS) +
2613                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2614                            lan743x_csr_read(adapter,
2615                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2616                            lan743x_csr_read(adapter,
2617                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2618         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2619                            lan743x_csr_read(adapter,
2620                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2621                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2622         stats->rx_dropped = lan743x_csr_read(adapter,
2623                                              STAT_RX_DROPPED_FRAMES);
2624         stats->tx_dropped = lan743x_csr_read(adapter,
2625                                              STAT_TX_EXCESSIVE_COLLISION);
2626         stats->multicast = lan743x_csr_read(adapter,
2627                                             STAT_RX_MULTICAST_FRAMES) +
2628                            lan743x_csr_read(adapter,
2629                                             STAT_TX_MULTICAST_FRAMES);
2630         stats->collisions = lan743x_csr_read(adapter,
2631                                              STAT_TX_SINGLE_COLLISIONS) +
2632                             lan743x_csr_read(adapter,
2633                                              STAT_TX_MULTIPLE_COLLISIONS) +
2634                             lan743x_csr_read(adapter,
2635                                              STAT_TX_LATE_COLLISIONS);
2636 }
2637
2638 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2639                                           void *addr)
2640 {
2641         struct lan743x_adapter *adapter = netdev_priv(netdev);
2642         struct sockaddr *sock_addr = addr;
2643         int ret;
2644
2645         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2646         if (ret)
2647                 return ret;
2648         ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2649         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2650         lan743x_rfe_update_mac_address(adapter);
2651         return 0;
2652 }
2653
2654 static const struct net_device_ops lan743x_netdev_ops = {
2655         .ndo_open               = lan743x_netdev_open,
2656         .ndo_stop               = lan743x_netdev_close,
2657         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2658         .ndo_do_ioctl           = lan743x_netdev_ioctl,
2659         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2660         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2661         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2662         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2663 };
2664
2665 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2666 {
2667         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2668 }
2669
2670 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2671 {
2672         mdiobus_unregister(adapter->mdiobus);
2673 }
2674
2675 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2676 {
2677         unregister_netdev(adapter->netdev);
2678
2679         lan743x_mdiobus_cleanup(adapter);
2680         lan743x_hardware_cleanup(adapter);
2681         lan743x_pci_cleanup(adapter);
2682 }
2683
2684 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2685                                  struct pci_dev *pdev)
2686 {
2687         struct lan743x_tx *tx;
2688         int index;
2689         int ret;
2690
2691         adapter->intr.irq = adapter->pdev->irq;
2692         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2693
2694         ret = lan743x_gpio_init(adapter);
2695         if (ret)
2696                 return ret;
2697
2698         ret = lan743x_mac_init(adapter);
2699         if (ret)
2700                 return ret;
2701
2702         ret = lan743x_phy_init(adapter);
2703         if (ret)
2704                 return ret;
2705
2706         ret = lan743x_ptp_init(adapter);
2707         if (ret)
2708                 return ret;
2709
2710         lan743x_rfe_update_mac_address(adapter);
2711
2712         ret = lan743x_dmac_init(adapter);
2713         if (ret)
2714                 return ret;
2715
2716         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2717                 adapter->rx[index].adapter = adapter;
2718                 adapter->rx[index].channel_number = index;
2719         }
2720
2721         tx = &adapter->tx[0];
2722         tx->adapter = adapter;
2723         tx->channel_number = 0;
2724         spin_lock_init(&tx->ring_lock);
2725         return 0;
2726 }
2727
2728 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2729 {
2730         int ret;
2731
2732         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2733         if (!(adapter->mdiobus)) {
2734                 ret = -ENOMEM;
2735                 goto return_error;
2736         }
2737
2738         adapter->mdiobus->priv = (void *)adapter;
2739         adapter->mdiobus->read = lan743x_mdiobus_read;
2740         adapter->mdiobus->write = lan743x_mdiobus_write;
2741         adapter->mdiobus->name = "lan743x-mdiobus";
2742         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2743                  "pci-%s", pci_name(adapter->pdev));
2744
2745         if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2746                 /* LAN7430 uses internal phy at address 1 */
2747                 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2748
2749         /* register mdiobus */
2750         ret = mdiobus_register(adapter->mdiobus);
2751         if (ret < 0)
2752                 goto return_error;
2753         return 0;
2754
2755 return_error:
2756         return ret;
2757 }
2758
2759 /* lan743x_pcidev_probe - Device Initialization Routine
2760  * @pdev: PCI device information struct
2761  * @id: entry in lan743x_pci_tbl
2762  *
2763  * Returns 0 on success, negative on failure
2764  *
2765  * initializes an adapter identified by a pci_dev structure.
2766  * The OS initialization, configuring of the adapter private structure,
2767  * and a hardware reset occur.
2768  **/
2769 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2770                                 const struct pci_device_id *id)
2771 {
2772         struct lan743x_adapter *adapter = NULL;
2773         struct net_device *netdev = NULL;
2774         const void *mac_addr;
2775         int ret = -ENODEV;
2776
2777         netdev = devm_alloc_etherdev(&pdev->dev,
2778                                      sizeof(struct lan743x_adapter));
2779         if (!netdev)
2780                 goto return_error;
2781
2782         SET_NETDEV_DEV(netdev, &pdev->dev);
2783         pci_set_drvdata(pdev, netdev);
2784         adapter = netdev_priv(netdev);
2785         adapter->netdev = netdev;
2786         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2787                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
2788                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2789         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2790
2791         mac_addr = of_get_mac_address(pdev->dev.of_node);
2792         if (!IS_ERR(mac_addr))
2793                 ether_addr_copy(adapter->mac_address, mac_addr);
2794
2795         ret = lan743x_pci_init(adapter, pdev);
2796         if (ret)
2797                 goto return_error;
2798
2799         ret = lan743x_csr_init(adapter);
2800         if (ret)
2801                 goto cleanup_pci;
2802
2803         ret = lan743x_hardware_init(adapter, pdev);
2804         if (ret)
2805                 goto cleanup_pci;
2806
2807         ret = lan743x_mdiobus_init(adapter);
2808         if (ret)
2809                 goto cleanup_hardware;
2810
2811         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2812         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2813         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2814         adapter->netdev->hw_features = adapter->netdev->features;
2815
2816         /* carrier off reporting is important to ethtool even BEFORE open */
2817         netif_carrier_off(netdev);
2818
2819         ret = register_netdev(adapter->netdev);
2820         if (ret < 0)
2821                 goto cleanup_mdiobus;
2822         return 0;
2823
2824 cleanup_mdiobus:
2825         lan743x_mdiobus_cleanup(adapter);
2826
2827 cleanup_hardware:
2828         lan743x_hardware_cleanup(adapter);
2829
2830 cleanup_pci:
2831         lan743x_pci_cleanup(adapter);
2832
2833 return_error:
2834         pr_warn("Initialization failed\n");
2835         return ret;
2836 }
2837
2838 /**
2839  * lan743x_pcidev_remove - Device Removal Routine
2840  * @pdev: PCI device information struct
2841  *
2842  * this is called by the PCI subsystem to alert the driver
2843  * that it should release a PCI device.  This could be caused by a
2844  * Hot-Plug event, or because the driver is going to be removed from
2845  * memory.
2846  **/
2847 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2848 {
2849         struct net_device *netdev = pci_get_drvdata(pdev);
2850         struct lan743x_adapter *adapter = netdev_priv(netdev);
2851
2852         lan743x_full_cleanup(adapter);
2853 }
2854
2855 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2856 {
2857         struct net_device *netdev = pci_get_drvdata(pdev);
2858         struct lan743x_adapter *adapter = netdev_priv(netdev);
2859
2860         rtnl_lock();
2861         netif_device_detach(netdev);
2862
2863         /* close netdev when netdev is at running state.
2864          * For instance, it is true when system goes to sleep by pm-suspend
2865          * However, it is false when system goes to sleep by suspend GUI menu
2866          */
2867         if (netif_running(netdev))
2868                 lan743x_netdev_close(netdev);
2869         rtnl_unlock();
2870
2871 #ifdef CONFIG_PM
2872         pci_save_state(pdev);
2873 #endif
2874
2875         /* clean up lan743x portion */
2876         lan743x_hardware_cleanup(adapter);
2877 }
2878
2879 #ifdef CONFIG_PM_SLEEP
2880 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2881 {
2882         return bitrev16(crc16(0xFFFF, buf, len));
2883 }
2884
2885 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2886 {
2887         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2888         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2889         const u8 arp_type[2] = { 0x08, 0x06 };
2890         int mask_index;
2891         u32 pmtctl;
2892         u32 wucsr;
2893         u32 macrx;
2894         u16 crc;
2895
2896         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2897                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2898
2899         /* clear wake settings */
2900         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2901         pmtctl |= PMT_CTL_WUPS_MASK_;
2902         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2903                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2904                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2905
2906         macrx = lan743x_csr_read(adapter, MAC_RX);
2907
2908         wucsr = 0;
2909         mask_index = 0;
2910
2911         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2912
2913         if (adapter->wolopts & WAKE_PHY) {
2914                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2915                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2916         }
2917         if (adapter->wolopts & WAKE_MAGIC) {
2918                 wucsr |= MAC_WUCSR_MPEN_;
2919                 macrx |= MAC_RX_RXEN_;
2920                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2921         }
2922         if (adapter->wolopts & WAKE_UCAST) {
2923                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2924                 macrx |= MAC_RX_RXEN_;
2925                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2926                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2927         }
2928         if (adapter->wolopts & WAKE_BCAST) {
2929                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2930                 macrx |= MAC_RX_RXEN_;
2931                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2932                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2933         }
2934         if (adapter->wolopts & WAKE_MCAST) {
2935                 /* IPv4 multicast */
2936                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2937                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2938                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2939                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2940                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2941                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2942                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2943                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2944                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2945                 mask_index++;
2946
2947                 /* IPv6 multicast */
2948                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2949                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2950                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2951                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2952                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2953                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2954                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2955                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2956                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2957                 mask_index++;
2958
2959                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2960                 macrx |= MAC_RX_RXEN_;
2961                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2962                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2963         }
2964         if (adapter->wolopts & WAKE_ARP) {
2965                 /* set MAC_WUF_CFG & WUF_MASK
2966                  * for packettype (offset 12,13) = ARP (0x0806)
2967                  */
2968                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2969                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2970                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2971                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2972                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
2973                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2974                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2975                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2976                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2977                 mask_index++;
2978
2979                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2980                 macrx |= MAC_RX_RXEN_;
2981                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2982                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2983         }
2984
2985         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2986         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2987         lan743x_csr_write(adapter, MAC_RX, macrx);
2988 }
2989
2990 static int lan743x_pm_suspend(struct device *dev)
2991 {
2992         struct pci_dev *pdev = to_pci_dev(dev);
2993         struct net_device *netdev = pci_get_drvdata(pdev);
2994         struct lan743x_adapter *adapter = netdev_priv(netdev);
2995
2996         lan743x_pcidev_shutdown(pdev);
2997
2998         /* clear all wakes */
2999         lan743x_csr_write(adapter, MAC_WUCSR, 0);
3000         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3001         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3002
3003         if (adapter->wolopts)
3004                 lan743x_pm_set_wol(adapter);
3005
3006         /* Host sets PME_En, put D3hot */
3007         return pci_prepare_to_sleep(pdev);;
3008 }
3009
3010 static int lan743x_pm_resume(struct device *dev)
3011 {
3012         struct pci_dev *pdev = to_pci_dev(dev);
3013         struct net_device *netdev = pci_get_drvdata(pdev);
3014         struct lan743x_adapter *adapter = netdev_priv(netdev);
3015         int ret;
3016
3017         pci_set_power_state(pdev, PCI_D0);
3018         pci_restore_state(pdev);
3019         pci_save_state(pdev);
3020
3021         ret = lan743x_hardware_init(adapter, pdev);
3022         if (ret) {
3023                 netif_err(adapter, probe, adapter->netdev,
3024                           "lan743x_hardware_init returned %d\n", ret);
3025         }
3026
3027         /* open netdev when netdev is at running state while resume.
3028          * For instance, it is true when system wakesup after pm-suspend
3029          * However, it is false when system wakes up after suspend GUI menu
3030          */
3031         if (netif_running(netdev))
3032                 lan743x_netdev_open(netdev);
3033
3034         netif_device_attach(netdev);
3035
3036         return 0;
3037 }
3038
3039 static const struct dev_pm_ops lan743x_pm_ops = {
3040         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3041 };
3042 #endif /* CONFIG_PM_SLEEP */
3043
3044 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3045         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3046         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3047         { 0, }
3048 };
3049
3050 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3051
3052 static struct pci_driver lan743x_pcidev_driver = {
3053         .name     = DRIVER_NAME,
3054         .id_table = lan743x_pcidev_tbl,
3055         .probe    = lan743x_pcidev_probe,
3056         .remove   = lan743x_pcidev_remove,
3057 #ifdef CONFIG_PM_SLEEP
3058         .driver.pm = &lan743x_pm_ops,
3059 #endif
3060         .shutdown = lan743x_pcidev_shutdown,
3061 };
3062
3063 module_pci_driver(lan743x_pcidev_driver);
3064
3065 MODULE_AUTHOR(DRIVER_AUTHOR);
3066 MODULE_DESCRIPTION(DRIVER_DESC);
3067 MODULE_LICENSE("GPL");