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 #define MMD_ACCESS_ADDRESS      0
  22 #define MMD_ACCESS_WRITE        1
  23 #define MMD_ACCESS_READ         2
  24 #define MMD_ACCESS_READ_INC     3
  25
  26 static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter)
  27 {
  28         u32 chip_rev;
  29         u32 strap;
  30
  31         strap = lan743x_csr_read(adapter, STRAP_READ);
  32         if (strap & STRAP_READ_USE_SGMII_EN_) {
  33                 if (strap & STRAP_READ_SGMII_EN_)
  34                         adapter->is_sgmii_en = true;
  35                 else
  36                         adapter->is_sgmii_en = false;
  37                 netif_dbg(adapter, drv, adapter->netdev,
  38                           "STRAP_READ: 0x%08X\n", strap);
  39         } else {
  40                 chip_rev = lan743x_csr_read(adapter, FPGA_REV);
  41                 if (chip_rev) {
  42                         if (chip_rev & FPGA_SGMII_OP)
  43                                 adapter->is_sgmii_en = true;
  44                         else
  45                                 adapter->is_sgmii_en = false;
  46                         netif_dbg(adapter, drv, adapter->netdev,
  47                                   "FPGA_REV: 0x%08X\n", chip_rev);
  48                 } else {
  49                         adapter->is_sgmii_en = false;
  50                 }
  51         }
  52 }
  53
  54 static bool is_pci11x1x_chip(struct lan743x_adapter *adapter)
  55 {
  56         struct lan743x_csr *csr = &adapter->csr;
  57         u32 id_rev = csr->id_rev;
  58
  59         if (((id_rev & 0xFFFF0000) == ID_REV_ID_A011_) ||
  60             ((id_rev & 0xFFFF0000) == ID_REV_ID_A041_)) {
  61                 return true;
  62         }
  63         return false;
  64 }
  65
  66 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  67 {
  68         pci_release_selected_regions(adapter->pdev,
  69                                      pci_select_bars(adapter->pdev,
  70                                                      IORESOURCE_MEM));
  71         pci_disable_device(adapter->pdev);
  72 }
  73
  74 static int lan743x_pci_init(struct lan743x_adapter *adapter,
  75                             struct pci_dev *pdev)
  76 {
  77         unsigned long bars = 0;
  78         int ret;
  79
  80         adapter->pdev = pdev;
  81         ret = pci_enable_device_mem(pdev);
  82         if (ret)
  83                 goto return_error;
  84
  85         netif_info(adapter, probe, adapter->netdev,
  86                    "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
  87                    pdev->vendor, pdev->device);
  88         bars = pci_select_bars(pdev, IORESOURCE_MEM);
  89         if (!test_bit(0, &bars))
  90                 goto disable_device;
  91
  92         ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
  93         if (ret)
  94                 goto disable_device;
  95
  96         pci_set_master(pdev);
  97         return 0;
  98
  99 disable_device:
 100         pci_disable_device(adapter->pdev);
 101
 102 return_error:
 103         return ret;
 104 }
 105
 106 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
 107 {
 108         return ioread32(&adapter->csr.csr_address[offset]);
 109 }
 110
 111 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
 112                        u32 data)
 113 {
 114         iowrite32(data, &adapter->csr.csr_address[offset]);
 115 }
 116
 117 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
 118
 119 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
 120 {
 121         u32 data;
 122
 123         data = lan743x_csr_read(adapter, HW_CFG);
 124         data |= HW_CFG_LRST_;
 125         lan743x_csr_write(adapter, HW_CFG, data);
 126
 127         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
 128                                   !(data & HW_CFG_LRST_), 100000, 10000000);
 129 }
 130
 131 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
 132                                     int offset, u32 bit_mask,
 133                                     int target_value, int usleep_min,
 134                                     int usleep_max, int count)
 135 {
 136         u32 data;
 137
 138         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
 139                                   target_value == ((data & bit_mask) ? 1 : 0),
 140                                   usleep_max, usleep_min * count);
 141 }
 142
 143 static int lan743x_csr_init(struct lan743x_adapter *adapter)
 144 {
 145         struct lan743x_csr *csr = &adapter->csr;
 146         resource_size_t bar_start, bar_length;
 147         int result;
 148
 149         bar_start = pci_resource_start(adapter->pdev, 0);
 150         bar_length = pci_resource_len(adapter->pdev, 0);
 151         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 152                                         bar_start, bar_length);
 153         if (!csr->csr_address) {
 154                 result = -ENOMEM;
 155                 goto clean_up;
 156         }
 157
 158         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 159         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 160         netif_info(adapter, probe, adapter->netdev,
 161                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 162                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 163                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 164         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
 165                 result = -ENODEV;
 166                 goto clean_up;
 167         }
 168
 169         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 170         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 171         case ID_REV_CHIP_REV_A0_:
 172                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 173                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 174                 break;
 175         case ID_REV_CHIP_REV_B0_:
 176                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 177                 break;
 178         }
 179
 180         result = lan743x_csr_light_reset(adapter);
 181         if (result)
 182                 goto clean_up;
 183         return 0;
 184 clean_up:
 185         return result;
 186 }
 187
 188 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter)
 189 {
 190         struct lan743x_intr *intr = &adapter->intr;
 191
 192         /* disable the interrupt to prevent repeated re-triggering */
 193         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 194         intr->software_isr_flag = true;
 195         wake_up(&intr->software_isr_wq);
 196 }
 197
 198 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 199 {
 200         struct lan743x_tx *tx = context;
 201         struct lan743x_adapter *adapter = tx->adapter;
 202         bool enable_flag = true;
 203
 204         lan743x_csr_read(adapter, INT_EN_SET);
 205         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 206                 lan743x_csr_write(adapter, INT_EN_CLR,
 207                                   INT_BIT_DMA_TX_(tx->channel_number));
 208         }
 209
 210         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 211                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 212                 u32 dmac_int_sts;
 213                 u32 dmac_int_en;
 214
 215                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 216                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 217                 else
 218                         dmac_int_sts = ioc_bit;
 219                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 220                         dmac_int_en = lan743x_csr_read(adapter,
 221                                                        DMAC_INT_EN_SET);
 222                 else
 223                         dmac_int_en = ioc_bit;
 224
 225                 dmac_int_en &= ioc_bit;
 226                 dmac_int_sts &= dmac_int_en;
 227                 if (dmac_int_sts & ioc_bit) {
 228                         napi_schedule(&tx->napi);
 229                         enable_flag = false;/* poll func will enable later */
 230                 }
 231         }
 232
 233         if (enable_flag)
 234                 /* enable isr */
 235                 lan743x_csr_write(adapter, INT_EN_SET,
 236                                   INT_BIT_DMA_TX_(tx->channel_number));
 237 }
 238
 239 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 240 {
 241         struct lan743x_rx *rx = context;
 242         struct lan743x_adapter *adapter = rx->adapter;
 243         bool enable_flag = true;
 244
 245         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 246                 lan743x_csr_write(adapter, INT_EN_CLR,
 247                                   INT_BIT_DMA_RX_(rx->channel_number));
 248         }
 249
 250         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 251                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 252                 u32 dmac_int_sts;
 253                 u32 dmac_int_en;
 254
 255                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 256                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 257                 else
 258                         dmac_int_sts = rx_frame_bit;
 259                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 260                         dmac_int_en = lan743x_csr_read(adapter,
 261                                                        DMAC_INT_EN_SET);
 262                 else
 263                         dmac_int_en = rx_frame_bit;
 264
 265                 dmac_int_en &= rx_frame_bit;
 266                 dmac_int_sts &= dmac_int_en;
 267                 if (dmac_int_sts & rx_frame_bit) {
 268                         napi_schedule(&rx->napi);
 269                         enable_flag = false;/* poll funct will enable later */
 270                 }
 271         }
 272
 273         if (enable_flag) {
 274                 /* enable isr */
 275                 lan743x_csr_write(adapter, INT_EN_SET,
 276                                   INT_BIT_DMA_RX_(rx->channel_number));
 277         }
 278 }
 279
 280 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 281 {
 282         struct lan743x_adapter *adapter = context;
 283         unsigned int channel;
 284
 285         if (int_sts & INT_BIT_ALL_RX_) {
 286                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 287                         channel++) {
 288                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 289
 290                         if (int_sts & int_bit) {
 291                                 lan743x_rx_isr(&adapter->rx[channel],
 292                                                int_bit, flags);
 293                                 int_sts &= ~int_bit;
 294                         }
 295                 }
 296         }
 297         if (int_sts & INT_BIT_ALL_TX_) {
 298                 for (channel = 0; channel < adapter->used_tx_channels;
 299                         channel++) {
 300                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 301
 302                         if (int_sts & int_bit) {
 303                                 lan743x_tx_isr(&adapter->tx[channel],
 304                                                int_bit, flags);
 305                                 int_sts &= ~int_bit;
 306                         }
 307                 }
 308         }
 309         if (int_sts & INT_BIT_ALL_OTHER_) {
 310                 if (int_sts & INT_BIT_SW_GP_) {
 311                         lan743x_intr_software_isr(adapter);
 312                         int_sts &= ~INT_BIT_SW_GP_;
 313                 }
 314                 if (int_sts & INT_BIT_1588_) {
 315                         lan743x_ptp_isr(adapter);
 316                         int_sts &= ~INT_BIT_1588_;
 317                 }
 318         }
 319         if (int_sts)
 320                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 321 }
 322
 323 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 324 {
 325         struct lan743x_vector *vector = ptr;
 326         struct lan743x_adapter *adapter = vector->adapter;
 327         irqreturn_t result = IRQ_NONE;
 328         u32 int_enables;
 329         u32 int_sts;
 330
 331         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 332                 int_sts = lan743x_csr_read(adapter, INT_STS);
 333         } else if (vector->flags &
 334                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 335                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 336                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 337         } else {
 338                 /* use mask as implied status */
 339                 int_sts = vector->int_mask | INT_BIT_MAS_;
 340         }
 341
 342         if (!(int_sts & INT_BIT_MAS_))
 343                 goto irq_done;
 344
 345         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 346                 /* disable vector interrupt */
 347                 lan743x_csr_write(adapter,
 348                                   INT_VEC_EN_CLR,
 349                                   INT_VEC_EN_(vector->vector_index));
 350
 351         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 352                 /* disable master interrupt */
 353                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 354
 355         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 356                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 357         } else {
 358                 /*  use vector mask as implied enable mask */
 359                 int_enables = vector->int_mask;
 360         }
 361
 362         int_sts &= int_enables;
 363         int_sts &= vector->int_mask;
 364         if (int_sts) {
 365                 if (vector->handler) {
 366                         vector->handler(vector->context,
 367                                         int_sts, vector->flags);
 368                 } else {
 369                         /* disable interrupts on this vector */
 370                         lan743x_csr_write(adapter, INT_EN_CLR,
 371                                           vector->int_mask);
 372                 }
 373                 result = IRQ_HANDLED;
 374         }
 375
 376         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 377                 /* enable master interrupt */
 378                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 379
 380         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 381                 /* enable vector interrupt */
 382                 lan743x_csr_write(adapter,
 383                                   INT_VEC_EN_SET,
 384                                   INT_VEC_EN_(vector->vector_index));
 385 irq_done:
 386         return result;
 387 }
 388
 389 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 390 {
 391         struct lan743x_intr *intr = &adapter->intr;
 392         int ret;
 393
 394         intr->software_isr_flag = false;
 395
 396         /* enable and activate test interrupt */
 397         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 398         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 399
 400         ret = wait_event_timeout(intr->software_isr_wq,
 401                                  intr->software_isr_flag,
 402                                  msecs_to_jiffies(200));
 403
 404         /* disable test interrupt */
 405         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 406
 407         return ret > 0 ? 0 : -ENODEV;
 408 }
 409
 410 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 411                                      int vector_index, u32 flags,
 412                                      u32 int_mask,
 413                                      lan743x_vector_handler handler,
 414                                      void *context)
 415 {
 416         struct lan743x_vector *vector = &adapter->intr.vector_list
 417                                         [vector_index];
 418         int ret;
 419
 420         vector->adapter = adapter;
 421         vector->flags = flags;
 422         vector->vector_index = vector_index;
 423         vector->int_mask = int_mask;
 424         vector->handler = handler;
 425         vector->context = context;
 426
 427         ret = request_irq(vector->irq,
 428                           lan743x_intr_entry_isr,
 429                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 430                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 431         if (ret) {
 432                 vector->handler = NULL;
 433                 vector->context = NULL;
 434                 vector->int_mask = 0;
 435                 vector->flags = 0;
 436         }
 437         return ret;
 438 }
 439
 440 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 441                                         int vector_index)
 442 {
 443         struct lan743x_vector *vector = &adapter->intr.vector_list
 444                                         [vector_index];
 445
 446         free_irq(vector->irq, vector);
 447         vector->handler = NULL;
 448         vector->context = NULL;
 449         vector->int_mask = 0;
 450         vector->flags = 0;
 451 }
 452
 453 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 454                                          u32 int_mask)
 455 {
 456         int index;
 457
 458         for (index = 0; index < adapter->max_vector_count; index++) {
 459                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 460                         return adapter->intr.vector_list[index].flags;
 461         }
 462         return 0;
 463 }
 464
 465 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 466 {
 467         struct lan743x_intr *intr = &adapter->intr;
 468         int index = 0;
 469
 470         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 471         if (adapter->is_pci11x1x)
 472                 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x0000FFFF);
 473         else
 474                 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 475
 476         for (index = 0; index < intr->number_of_vectors; index++) {
 477                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 478                         lan743x_intr_unregister_isr(adapter, index);
 479                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 480                 }
 481         }
 482
 483         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 484                 pci_disable_msi(adapter->pdev);
 485                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 486         }
 487
 488         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 489                 pci_disable_msix(adapter->pdev);
 490                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 491         }
 492 }
 493
 494 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 495 {
 496         struct msix_entry msix_entries[PCI11X1X_MAX_VECTOR_COUNT];
 497         struct lan743x_intr *intr = &adapter->intr;
 498         unsigned int used_tx_channels;
 499         u32 int_vec_en_auto_clr = 0;
 500         u8 max_vector_count;
 501         u32 int_vec_map0 = 0;
 502         u32 int_vec_map1 = 0;
 503         int ret = -ENODEV;
 504         int index = 0;
 505         u32 flags = 0;
 506
 507         intr->number_of_vectors = 0;
 508
 509         /* Try to set up MSIX interrupts */
 510         max_vector_count = adapter->max_vector_count;
 511         memset(&msix_entries[0], 0,
 512                sizeof(struct msix_entry) * max_vector_count);
 513         for (index = 0; index < max_vector_count; index++)
 514                 msix_entries[index].entry = index;
 515         used_tx_channels = adapter->used_tx_channels;
 516         ret = pci_enable_msix_range(adapter->pdev,
 517                                     msix_entries, 1,
 518                                     1 + used_tx_channels +
 519                                     LAN743X_USED_RX_CHANNELS);
 520
 521         if (ret > 0) {
 522                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 523                 intr->number_of_vectors = ret;
 524                 intr->using_vectors = true;
 525                 for (index = 0; index < intr->number_of_vectors; index++)
 526                         intr->vector_list[index].irq = msix_entries
 527                                                        [index].vector;
 528                 netif_info(adapter, ifup, adapter->netdev,
 529                            "using MSIX interrupts, number of vectors = %d\n",
 530                            intr->number_of_vectors);
 531         }
 532
 533         /* If MSIX failed try to setup using MSI interrupts */
 534         if (!intr->number_of_vectors) {
 535                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 536                         if (!pci_enable_msi(adapter->pdev)) {
 537                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 538                                 intr->number_of_vectors = 1;
 539                                 intr->using_vectors = true;
 540                                 intr->vector_list[0].irq =
 541                                         adapter->pdev->irq;
 542                                 netif_info(adapter, ifup, adapter->netdev,
 543                                            "using MSI interrupts, number of vectors = %d\n",
 544                                            intr->number_of_vectors);
 545                         }
 546                 }
 547         }
 548
 549         /* If MSIX, and MSI failed, setup using legacy interrupt */
 550         if (!intr->number_of_vectors) {
 551                 intr->number_of_vectors = 1;
 552                 intr->using_vectors = false;
 553                 intr->vector_list[0].irq = intr->irq;
 554                 netif_info(adapter, ifup, adapter->netdev,
 555                            "using legacy interrupts\n");
 556         }
 557
 558         /* At this point we must have at least one irq */
 559         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 560
 561         /* map all interrupts to vector 0 */
 562         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 563         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 564         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 565         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 566                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 567                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 568                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 569
 570         if (intr->using_vectors) {
 571                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 572                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 573         } else {
 574                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 575                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 576                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 577         }
 578
 579         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 580                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 581                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 582                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 583                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 584                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 585                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 586         }
 587
 588         init_waitqueue_head(&intr->software_isr_wq);
 589
 590         ret = lan743x_intr_register_isr(adapter, 0, flags,
 591                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 592                                         INT_BIT_ALL_OTHER_,
 593                                         lan743x_intr_shared_isr, adapter);
 594         if (ret)
 595                 goto clean_up;
 596         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 597
 598         if (intr->using_vectors)
 599                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 600                                   INT_VEC_EN_(0));
 601
 602         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 603                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 604                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 605                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 606                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 607                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 608                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 609                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 610                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 611                 if (adapter->is_pci11x1x) {
 612                         lan743x_csr_write(adapter, INT_MOD_CFG8, LAN743X_INT_MOD);
 613                         lan743x_csr_write(adapter, INT_MOD_CFG9, LAN743X_INT_MOD);
 614                         lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00007654);
 615                         lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00003210);
 616                 } else {
 617                         lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 618                         lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 619                 }
 620                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 621         }
 622
 623         /* enable interrupts */
 624         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 625         ret = lan743x_intr_test_isr(adapter);
 626         if (ret)
 627                 goto clean_up;
 628
 629         if (intr->number_of_vectors > 1) {
 630                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 631
 632                 if (number_of_tx_vectors > used_tx_channels)
 633                         number_of_tx_vectors = used_tx_channels;
 634                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 635                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 636                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 637                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 638                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 639                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 640
 641                 if (adapter->csr.flags &
 642                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 643                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 644                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 645                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 646                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 647                 }
 648
 649                 for (index = 0; index < number_of_tx_vectors; index++) {
 650                         u32 int_bit = INT_BIT_DMA_TX_(index);
 651                         int vector = index + 1;
 652
 653                         /* map TX interrupt to vector */
 654                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 655                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 656
 657                         /* Remove TX interrupt from shared mask */
 658                         intr->vector_list[0].int_mask &= ~int_bit;
 659                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 660                                                         int_bit, lan743x_tx_isr,
 661                                                         &adapter->tx[index]);
 662                         if (ret)
 663                                 goto clean_up;
 664                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 665                         if (!(flags &
 666                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 667                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 668                                                   INT_VEC_EN_(vector));
 669                 }
 670         }
 671         if ((intr->number_of_vectors - used_tx_channels) > 1) {
 672                 int number_of_rx_vectors = intr->number_of_vectors -
 673                                                 used_tx_channels - 1;
 674
 675                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 676                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 677
 678                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 679                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 680                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 681                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 682                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 683                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 684
 685                 if (adapter->csr.flags &
 686                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 687                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 688                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 689                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 690                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 691                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 692                 }
 693                 for (index = 0; index < number_of_rx_vectors; index++) {
 694                         int vector = index + 1 + used_tx_channels;
 695                         u32 int_bit = INT_BIT_DMA_RX_(index);
 696
 697                         /* map RX interrupt to vector */
 698                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 699                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 700                         if (flags &
 701                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 702                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 703                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 704                                                   int_vec_en_auto_clr);
 705                         }
 706
 707                         /* Remove RX interrupt from shared mask */
 708                         intr->vector_list[0].int_mask &= ~int_bit;
 709                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 710                                                         int_bit, lan743x_rx_isr,
 711                                                         &adapter->rx[index]);
 712                         if (ret)
 713                                 goto clean_up;
 714                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 715
 716                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 717                                           INT_VEC_EN_(vector));
 718                 }
 719         }
 720         return 0;
 721
 722 clean_up:
 723         lan743x_intr_close(adapter);
 724         return ret;
 725 }
 726
 727 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 728                             u32 select, u32 addr, u32 length, u32 *buf)
 729 {
 730         u32 dp_sel;
 731         int i;
 732
 733         if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 734                                      1, 40, 100, 100))
 735                 return -EIO;
 736         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 737         dp_sel &= ~DP_SEL_MASK_;
 738         dp_sel |= select;
 739         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 740
 741         for (i = 0; i < length; i++) {
 742                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 743                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 744                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 745                 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
 746                                              1, 40, 100, 100))
 747                         return -EIO;
 748         }
 749
 750         return 0;
 751 }
 752
 753 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 754 {
 755         u32 ret;
 756
 757         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 758                 MAC_MII_ACC_PHY_ADDR_MASK_;
 759         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 760                 MAC_MII_ACC_MIIRINDA_MASK_;
 761
 762         if (read)
 763                 ret |= MAC_MII_ACC_MII_READ_;
 764         else
 765                 ret |= MAC_MII_ACC_MII_WRITE_;
 766         ret |= MAC_MII_ACC_MII_BUSY_;
 767
 768         return ret;
 769 }
 770
 771 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 772 {
 773         u32 data;
 774
 775         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 776                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 777 }
 778
 779 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
 780 {
 781         struct lan743x_adapter *adapter = bus->priv;
 782         u32 val, mii_access;
 783         int ret;
 784
 785         /* comfirm MII not busy */
 786         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 787         if (ret < 0)
 788                 return ret;
 789
 790         /* set the address, index & direction (read from PHY) */
 791         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 792         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 793         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 794         if (ret < 0)
 795                 return ret;
 796
 797         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 798         return (int)(val & 0xFFFF);
 799 }
 800
 801 static int lan743x_mdiobus_write(struct mii_bus *bus,
 802                                  int phy_id, int index, u16 regval)
 803 {
 804         struct lan743x_adapter *adapter = bus->priv;
 805         u32 val, mii_access;
 806         int ret;
 807
 808         /* confirm MII not busy */
 809         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 810         if (ret < 0)
 811                 return ret;
 812         val = (u32)regval;
 813         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 814
 815         /* set the address, index & direction (write to PHY) */
 816         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 817         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 818         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 819         return ret;
 820 }
 821
 822 static u32 lan743x_mac_mmd_access(int id, int index, int op)
 823 {
 824         u16 dev_addr;
 825         u32 ret;
 826
 827         dev_addr = (index >> 16) & 0x1f;
 828         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 829                 MAC_MII_ACC_PHY_ADDR_MASK_;
 830         ret |= (dev_addr << MAC_MII_ACC_MIIMMD_SHIFT_) &
 831                 MAC_MII_ACC_MIIMMD_MASK_;
 832         if (op == MMD_ACCESS_WRITE)
 833                 ret |= MAC_MII_ACC_MIICMD_WRITE_;
 834         else if (op == MMD_ACCESS_READ)
 835                 ret |= MAC_MII_ACC_MIICMD_READ_;
 836         else if (op == MMD_ACCESS_READ_INC)
 837                 ret |= MAC_MII_ACC_MIICMD_READ_INC_;
 838         else
 839                 ret |= MAC_MII_ACC_MIICMD_ADDR_;
 840         ret |= (MAC_MII_ACC_MII_BUSY_ | MAC_MII_ACC_MIICL45_);
 841
 842         return ret;
 843 }
 844
 845 static int lan743x_mdiobus_c45_read(struct mii_bus *bus, int phy_id, int index)
 846 {
 847         struct lan743x_adapter *adapter = bus->priv;
 848         u32 mmd_access;
 849         int ret;
 850
 851         /* comfirm MII not busy */
 852         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 853         if (ret < 0)
 854                 return ret;
 855         if (index & MII_ADDR_C45) {
 856                 /* Load Register Address */
 857                 lan743x_csr_write(adapter, MAC_MII_DATA, (u32)(index & 0xffff));
 858                 mmd_access = lan743x_mac_mmd_access(phy_id, index,
 859                                                     MMD_ACCESS_ADDRESS);
 860                 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 861                 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 862                 if (ret < 0)
 863                         return ret;
 864                 /* Read Data */
 865                 mmd_access = lan743x_mac_mmd_access(phy_id, index,
 866                                                     MMD_ACCESS_READ);
 867                 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 868                 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 869                 if (ret < 0)
 870                         return ret;
 871                 ret = lan743x_csr_read(adapter, MAC_MII_DATA);
 872                 return (int)(ret & 0xFFFF);
 873         }
 874
 875         ret = lan743x_mdiobus_read(bus, phy_id, index);
 876         return ret;
 877 }
 878
 879 static int lan743x_mdiobus_c45_write(struct mii_bus *bus,
 880                                      int phy_id, int index, u16 regval)
 881 {
 882         struct lan743x_adapter *adapter = bus->priv;
 883         u32 mmd_access;
 884         int ret;
 885
 886         /* confirm MII not busy */
 887         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 888         if (ret < 0)
 889                 return ret;
 890         if (index & MII_ADDR_C45) {
 891                 /* Load Register Address */
 892                 lan743x_csr_write(adapter, MAC_MII_DATA, (u32)(index & 0xffff));
 893                 mmd_access = lan743x_mac_mmd_access(phy_id, index,
 894                                                     MMD_ACCESS_ADDRESS);
 895                 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 896                 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 897                 if (ret < 0)
 898                         return ret;
 899                 /* Write Data */
 900                 lan743x_csr_write(adapter, MAC_MII_DATA, (u32)regval);
 901                 mmd_access = lan743x_mac_mmd_access(phy_id, index,
 902                                                     MMD_ACCESS_WRITE);
 903                 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 904                 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 905         } else {
 906                 ret = lan743x_mdiobus_write(bus, phy_id, index, regval);
 907         }
 908
 909         return ret;
 910 }
 911
 912 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 913                                     u8 *addr)
 914 {
 915         u32 addr_lo, addr_hi;
 916
 917         addr_lo = addr[0] |
 918                 addr[1] << 8 |
 919                 addr[2] << 16 |
 920                 addr[3] << 24;
 921         addr_hi = addr[4] |
 922                 addr[5] << 8;
 923         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
 924         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
 925
 926         ether_addr_copy(adapter->mac_address, addr);
 927         netif_info(adapter, drv, adapter->netdev,
 928                    "MAC address set to %pM\n", addr);
 929 }
 930
 931 static int lan743x_mac_init(struct lan743x_adapter *adapter)
 932 {
 933         bool mac_address_valid = true;
 934         struct net_device *netdev;
 935         u32 mac_addr_hi = 0;
 936         u32 mac_addr_lo = 0;
 937         u32 data;
 938
 939         netdev = adapter->netdev;
 940
 941         /* disable auto duplex, and speed detection. Phylib does that */
 942         data = lan743x_csr_read(adapter, MAC_CR);
 943         data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
 944         data |= MAC_CR_CNTR_RST_;
 945         lan743x_csr_write(adapter, MAC_CR, data);
 946
 947         if (!is_valid_ether_addr(adapter->mac_address)) {
 948                 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
 949                 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
 950                 adapter->mac_address[0] = mac_addr_lo & 0xFF;
 951                 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
 952                 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
 953                 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
 954                 adapter->mac_address[4] = mac_addr_hi & 0xFF;
 955                 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
 956
 957                 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
 958                     mac_addr_lo == 0xFFFFFFFF) {
 959                         mac_address_valid = false;
 960                 } else if (!is_valid_ether_addr(adapter->mac_address)) {
 961                         mac_address_valid = false;
 962                 }
 963
 964                 if (!mac_address_valid)
 965                         eth_random_addr(adapter->mac_address);
 966         }
 967         lan743x_mac_set_address(adapter, adapter->mac_address);
 968         eth_hw_addr_set(netdev, adapter->mac_address);
 969
 970         return 0;
 971 }
 972
 973 static int lan743x_mac_open(struct lan743x_adapter *adapter)
 974 {
 975         u32 temp;
 976
 977         temp = lan743x_csr_read(adapter, MAC_RX);
 978         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
 979         temp = lan743x_csr_read(adapter, MAC_TX);
 980         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
 981         return 0;
 982 }
 983
 984 static void lan743x_mac_close(struct lan743x_adapter *adapter)
 985 {
 986         u32 temp;
 987
 988         temp = lan743x_csr_read(adapter, MAC_TX);
 989         temp &= ~MAC_TX_TXEN_;
 990         lan743x_csr_write(adapter, MAC_TX, temp);
 991         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
 992                                  1, 1000, 20000, 100);
 993
 994         temp = lan743x_csr_read(adapter, MAC_RX);
 995         temp &= ~MAC_RX_RXEN_;
 996         lan743x_csr_write(adapter, MAC_RX, temp);
 997         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
 998                                  1, 1000, 20000, 100);
 999 }
1000
1001 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
1002                                               bool tx_enable, bool rx_enable)
1003 {
1004         u32 flow_setting = 0;
1005
1006         /* set maximum pause time because when fifo space frees
1007          * up a zero value pause frame will be sent to release the pause
1008          */
1009         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
1010         if (tx_enable)
1011                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
1012         if (rx_enable)
1013                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
1014         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
1015 }
1016
1017 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
1018 {
1019         int enabled = 0;
1020         u32 mac_rx = 0;
1021
1022         mac_rx = lan743x_csr_read(adapter, MAC_RX);
1023         if (mac_rx & MAC_RX_RXEN_) {
1024                 enabled = 1;
1025                 if (mac_rx & MAC_RX_RXD_) {
1026                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
1027                         mac_rx &= ~MAC_RX_RXD_;
1028                 }
1029                 mac_rx &= ~MAC_RX_RXEN_;
1030                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1031                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
1032                                          1, 1000, 20000, 100);
1033                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
1034         }
1035
1036         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
1037         mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN)
1038                   << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
1039         lan743x_csr_write(adapter, MAC_RX, mac_rx);
1040
1041         if (enabled) {
1042                 mac_rx |= MAC_RX_RXEN_;
1043                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1044         }
1045         return 0;
1046 }
1047
1048 /* PHY */
1049 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
1050 {
1051         u32 data;
1052
1053         /* Only called with in probe, and before mdiobus_register */
1054
1055         data = lan743x_csr_read(adapter, PMT_CTL);
1056         data |= PMT_CTL_ETH_PHY_RST_;
1057         lan743x_csr_write(adapter, PMT_CTL, data);
1058
1059         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
1060                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
1061                                   (data & PMT_CTL_READY_)),
1062                                   50000, 1000000);
1063 }
1064
1065 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
1066                                            u16 local_adv, u16 remote_adv)
1067 {
1068         struct lan743x_phy *phy = &adapter->phy;
1069         u8 cap;
1070
1071         if (phy->fc_autoneg)
1072                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
1073         else
1074                 cap = phy->fc_request_control;
1075
1076         lan743x_mac_flow_ctrl_set_enables(adapter,
1077                                           cap & FLOW_CTRL_TX,
1078                                           cap & FLOW_CTRL_RX);
1079 }
1080
1081 static int lan743x_phy_init(struct lan743x_adapter *adapter)
1082 {
1083         return lan743x_phy_reset(adapter);
1084 }
1085
1086 static void lan743x_phy_link_status_change(struct net_device *netdev)
1087 {
1088         struct lan743x_adapter *adapter = netdev_priv(netdev);
1089         struct phy_device *phydev = netdev->phydev;
1090         u32 data;
1091
1092         phy_print_status(phydev);
1093         if (phydev->state == PHY_RUNNING) {
1094                 int remote_advertisement = 0;
1095                 int local_advertisement = 0;
1096
1097                 data = lan743x_csr_read(adapter, MAC_CR);
1098
1099                 /* set interface mode */
1100                 if (phy_interface_is_rgmii(phydev))
1101                         /* RGMII */
1102                         data &= ~MAC_CR_MII_EN_;
1103                 else
1104                         /* GMII */
1105                         data |= MAC_CR_MII_EN_;
1106
1107                 /* set duplex mode */
1108                 if (phydev->duplex)
1109                         data |= MAC_CR_DPX_;
1110                 else
1111                         data &= ~MAC_CR_DPX_;
1112
1113                 /* set bus speed */
1114                 switch (phydev->speed) {
1115                 case SPEED_10:
1116                         data &= ~MAC_CR_CFG_H_;
1117                         data &= ~MAC_CR_CFG_L_;
1118                 break;
1119                 case SPEED_100:
1120                         data &= ~MAC_CR_CFG_H_;
1121                         data |= MAC_CR_CFG_L_;
1122                 break;
1123                 case SPEED_1000:
1124                         data |= MAC_CR_CFG_H_;
1125                         data &= ~MAC_CR_CFG_L_;
1126                 break;
1127                 }
1128                 lan743x_csr_write(adapter, MAC_CR, data);
1129
1130                 local_advertisement =
1131                         linkmode_adv_to_mii_adv_t(phydev->advertising);
1132                 remote_advertisement =
1133                         linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
1134
1135                 lan743x_phy_update_flowcontrol(adapter, local_advertisement,
1136                                                remote_advertisement);
1137                 lan743x_ptp_update_latency(adapter, phydev->speed);
1138         }
1139 }
1140
1141 static void lan743x_phy_close(struct lan743x_adapter *adapter)
1142 {
1143         struct net_device *netdev = adapter->netdev;
1144
1145         phy_stop(netdev->phydev);
1146         phy_disconnect(netdev->phydev);
1147         netdev->phydev = NULL;
1148 }
1149
1150 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1151 {
1152         struct net_device *netdev = adapter->netdev;
1153         struct lan743x_phy *phy = &adapter->phy;
1154         struct phy_device *phydev;
1155         int ret = -EIO;
1156
1157         /* try devicetree phy, or fixed link */
1158         phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1159                                         lan743x_phy_link_status_change);
1160
1161         if (!phydev) {
1162                 /* try internal phy */
1163                 phydev = phy_find_first(adapter->mdiobus);
1164                 if (!phydev)
1165                         goto return_error;
1166
1167                 if (adapter->is_pci11x1x)
1168                         ret = phy_connect_direct(netdev, phydev,
1169                                                  lan743x_phy_link_status_change,
1170                                                  PHY_INTERFACE_MODE_RGMII);
1171                 else
1172                         ret = phy_connect_direct(netdev, phydev,
1173                                                  lan743x_phy_link_status_change,
1174                                                  PHY_INTERFACE_MODE_GMII);
1175                 if (ret)
1176                         goto return_error;
1177         }
1178
1179         /* MAC doesn't support 1000T Half */
1180         phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1181
1182         /* support both flow controls */
1183         phy_support_asym_pause(phydev);
1184         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1185         phy->fc_autoneg = phydev->autoneg;
1186
1187         phy_start(phydev);
1188         phy_start_aneg(phydev);
1189         phy_attached_info(phydev);
1190         return 0;
1191
1192 return_error:
1193         return ret;
1194 }
1195
1196 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1197 {
1198         lan743x_csr_write(adapter, RFE_RSS_CFG,
1199                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1200                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1201                 RFE_RSS_CFG_IPV6_EX_ |
1202                 RFE_RSS_CFG_UDP_IPV6_ |
1203                 RFE_RSS_CFG_TCP_IPV6_ |
1204                 RFE_RSS_CFG_IPV6_ |
1205                 RFE_RSS_CFG_UDP_IPV4_ |
1206                 RFE_RSS_CFG_TCP_IPV4_ |
1207                 RFE_RSS_CFG_IPV4_ |
1208                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1209                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1210                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1211                 RFE_RSS_CFG_RSS_ENABLE_);
1212 }
1213
1214 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1215 {
1216         u8 *mac_addr;
1217         u32 mac_addr_hi = 0;
1218         u32 mac_addr_lo = 0;
1219
1220         /* Add mac address to perfect Filter */
1221         mac_addr = adapter->mac_address;
1222         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1223                       (((u32)(mac_addr[1])) << 8) |
1224                       (((u32)(mac_addr[2])) << 16) |
1225                       (((u32)(mac_addr[3])) << 24));
1226         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1227                       (((u32)(mac_addr[5])) << 8));
1228
1229         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1230         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1231                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1232 }
1233
1234 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1235 {
1236         struct net_device *netdev = adapter->netdev;
1237         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1238         u32 rfctl;
1239         u32 data;
1240
1241         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1242         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1243                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1244         rfctl |= RFE_CTL_AB_;
1245         if (netdev->flags & IFF_PROMISC) {
1246                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1247         } else {
1248                 if (netdev->flags & IFF_ALLMULTI)
1249                         rfctl |= RFE_CTL_AM_;
1250         }
1251
1252         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1253         if (netdev_mc_count(netdev)) {
1254                 struct netdev_hw_addr *ha;
1255                 int i;
1256
1257                 rfctl |= RFE_CTL_DA_PERFECT_;
1258                 i = 1;
1259                 netdev_for_each_mc_addr(ha, netdev) {
1260                         /* set first 32 into Perfect Filter */
1261                         if (i < 33) {
1262                                 lan743x_csr_write(adapter,
1263                                                   RFE_ADDR_FILT_HI(i), 0);
1264                                 data = ha->addr[3];
1265                                 data = ha->addr[2] | (data << 8);
1266                                 data = ha->addr[1] | (data << 8);
1267                                 data = ha->addr[0] | (data << 8);
1268                                 lan743x_csr_write(adapter,
1269                                                   RFE_ADDR_FILT_LO(i), data);
1270                                 data = ha->addr[5];
1271                                 data = ha->addr[4] | (data << 8);
1272                                 data |= RFE_ADDR_FILT_HI_VALID_;
1273                                 lan743x_csr_write(adapter,
1274                                                   RFE_ADDR_FILT_HI(i), data);
1275                         } else {
1276                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1277                                              23) & 0x1FF;
1278                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1279                                 rfctl |= RFE_CTL_MCAST_HASH_;
1280                         }
1281                         i++;
1282                 }
1283         }
1284
1285         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1286                          DP_SEL_VHF_VLAN_LEN,
1287                          DP_SEL_VHF_HASH_LEN, hash_table);
1288         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1289 }
1290
1291 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1292 {
1293         u32 data = 0;
1294
1295         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1296         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1297                                  0, 1000, 20000, 100);
1298         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1299         case DMA_DESCRIPTOR_SPACING_16:
1300                 data = DMAC_CFG_MAX_DSPACE_16_;
1301                 break;
1302         case DMA_DESCRIPTOR_SPACING_32:
1303                 data = DMAC_CFG_MAX_DSPACE_32_;
1304                 break;
1305         case DMA_DESCRIPTOR_SPACING_64:
1306                 data = DMAC_CFG_MAX_DSPACE_64_;
1307                 break;
1308         case DMA_DESCRIPTOR_SPACING_128:
1309                 data = DMAC_CFG_MAX_DSPACE_128_;
1310                 break;
1311         default:
1312                 return -EPERM;
1313         }
1314         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1315                 data |= DMAC_CFG_COAL_EN_;
1316         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1317         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1318         lan743x_csr_write(adapter, DMAC_CFG, data);
1319         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1320         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1321         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1322         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1323         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1324         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1325         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1326         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1327         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1328         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1329         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1330         return 0;
1331 }
1332
1333 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1334                                      int tx_channel)
1335 {
1336         u32 dmac_cmd = 0;
1337
1338         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1339         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1340                                       DMAC_CMD_START_T_(tx_channel)),
1341                                       (dmac_cmd &
1342                                       DMAC_CMD_STOP_T_(tx_channel)));
1343 }
1344
1345 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1346                                              int tx_channel)
1347 {
1348         int timeout = 100;
1349         int result = 0;
1350
1351         while (timeout &&
1352                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1353                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1354                 usleep_range(1000, 20000);
1355                 timeout--;
1356         }
1357         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1358                 result = -ENODEV;
1359         return result;
1360 }
1361
1362 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1363                                      int rx_channel)
1364 {
1365         u32 dmac_cmd = 0;
1366
1367         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1368         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1369                                       DMAC_CMD_START_R_(rx_channel)),
1370                                       (dmac_cmd &
1371                                       DMAC_CMD_STOP_R_(rx_channel)));
1372 }
1373
1374 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1375                                              int rx_channel)
1376 {
1377         int timeout = 100;
1378         int result = 0;
1379
1380         while (timeout &&
1381                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1382                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1383                 usleep_range(1000, 20000);
1384                 timeout--;
1385         }
1386         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1387                 result = -ENODEV;
1388         return result;
1389 }
1390
1391 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1392                                     int descriptor_index, bool cleanup)
1393 {
1394         struct lan743x_tx_buffer_info *buffer_info = NULL;
1395         struct lan743x_tx_descriptor *descriptor = NULL;
1396         u32 descriptor_type = 0;
1397         bool ignore_sync;
1398
1399         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1400         buffer_info = &tx->buffer_info[descriptor_index];
1401         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1402                 goto done;
1403
1404         descriptor_type = le32_to_cpu(descriptor->data0) &
1405                           TX_DESC_DATA0_DTYPE_MASK_;
1406         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1407                 goto clean_up_data_descriptor;
1408         else
1409                 goto clear_active;
1410
1411 clean_up_data_descriptor:
1412         if (buffer_info->dma_ptr) {
1413                 if (buffer_info->flags &
1414                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1415                         dma_unmap_page(&tx->adapter->pdev->dev,
1416                                        buffer_info->dma_ptr,
1417                                        buffer_info->buffer_length,
1418                                        DMA_TO_DEVICE);
1419                 } else {
1420                         dma_unmap_single(&tx->adapter->pdev->dev,
1421                                          buffer_info->dma_ptr,
1422                                          buffer_info->buffer_length,
1423                                          DMA_TO_DEVICE);
1424                 }
1425                 buffer_info->dma_ptr = 0;
1426                 buffer_info->buffer_length = 0;
1427         }
1428         if (!buffer_info->skb)
1429                 goto clear_active;
1430
1431         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1432                 dev_kfree_skb_any(buffer_info->skb);
1433                 goto clear_skb;
1434         }
1435
1436         if (cleanup) {
1437                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1438                 dev_kfree_skb_any(buffer_info->skb);
1439         } else {
1440                 ignore_sync = (buffer_info->flags &
1441                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1442                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1443                                              buffer_info->skb, ignore_sync);
1444         }
1445
1446 clear_skb:
1447         buffer_info->skb = NULL;
1448
1449 clear_active:
1450         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1451
1452 done:
1453         memset(buffer_info, 0, sizeof(*buffer_info));
1454         memset(descriptor, 0, sizeof(*descriptor));
1455 }
1456
1457 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1458 {
1459         return ((++index) % tx->ring_size);
1460 }
1461
1462 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1463 {
1464         while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1465                 lan743x_tx_release_desc(tx, tx->last_head, false);
1466                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1467         }
1468 }
1469
1470 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1471 {
1472         u32 original_head = 0;
1473
1474         original_head = tx->last_head;
1475         do {
1476                 lan743x_tx_release_desc(tx, tx->last_head, true);
1477                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1478         } while (tx->last_head != original_head);
1479         memset(tx->ring_cpu_ptr, 0,
1480                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1481         memset(tx->buffer_info, 0,
1482                sizeof(*tx->buffer_info) * (tx->ring_size));
1483 }
1484
1485 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1486                                    struct sk_buff *skb)
1487 {
1488         int result = 1; /* 1 for the main skb buffer */
1489         int nr_frags = 0;
1490
1491         if (skb_is_gso(skb))
1492                 result++; /* requires an extension descriptor */
1493         nr_frags = skb_shinfo(skb)->nr_frags;
1494         result += nr_frags; /* 1 for each fragment buffer */
1495         return result;
1496 }
1497
1498 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1499 {
1500         int last_head = tx->last_head;
1501         int last_tail = tx->last_tail;
1502
1503         if (last_tail >= last_head)
1504                 return tx->ring_size - last_tail + last_head - 1;
1505         else
1506                 return last_head - last_tail - 1;
1507 }
1508
1509 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1510                                       bool enable_timestamping,
1511                                       bool enable_onestep_sync)
1512 {
1513         if (enable_timestamping)
1514                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1515         else
1516                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1517         if (enable_onestep_sync)
1518                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1519         else
1520                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1521 }
1522
1523 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1524                                   unsigned char *first_buffer,
1525                                   unsigned int first_buffer_length,
1526                                   unsigned int frame_length,
1527                                   bool time_stamp,
1528                                   bool check_sum)
1529 {
1530         /* called only from within lan743x_tx_xmit_frame.
1531          * assuming tx->ring_lock has already been acquired.
1532          */
1533         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1534         struct lan743x_tx_buffer_info *buffer_info = NULL;
1535         struct lan743x_adapter *adapter = tx->adapter;
1536         struct device *dev = &adapter->pdev->dev;
1537         dma_addr_t dma_ptr;
1538
1539         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1540         tx->frame_first = tx->last_tail;
1541         tx->frame_tail = tx->frame_first;
1542
1543         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1544         buffer_info = &tx->buffer_info[tx->frame_tail];
1545         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1546                                  DMA_TO_DEVICE);
1547         if (dma_mapping_error(dev, dma_ptr))
1548                 return -ENOMEM;
1549
1550         tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1551         tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1552         tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1553                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1554
1555         buffer_info->skb = NULL;
1556         buffer_info->dma_ptr = dma_ptr;
1557         buffer_info->buffer_length = first_buffer_length;
1558         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1559
1560         tx->frame_data0 = (first_buffer_length &
1561                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1562                 TX_DESC_DATA0_DTYPE_DATA_ |
1563                 TX_DESC_DATA0_FS_ |
1564                 TX_DESC_DATA0_FCS_;
1565         if (time_stamp)
1566                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1567
1568         if (check_sum)
1569                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1570                                    TX_DESC_DATA0_IPE_ |
1571                                    TX_DESC_DATA0_TPE_;
1572
1573         /* data0 will be programmed in one of other frame assembler functions */
1574         return 0;
1575 }
1576
1577 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1578                                      unsigned int frame_length,
1579                                      int nr_frags)
1580 {
1581         /* called only from within lan743x_tx_xmit_frame.
1582          * assuming tx->ring_lock has already been acquired.
1583          */
1584         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1585         struct lan743x_tx_buffer_info *buffer_info = NULL;
1586
1587         /* wrap up previous descriptor */
1588         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1589         if (nr_frags <= 0) {
1590                 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1591                 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1592         }
1593         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1594         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1595
1596         /* move to next descriptor */
1597         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1598         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1599         buffer_info = &tx->buffer_info[tx->frame_tail];
1600
1601         /* add extension descriptor */
1602         tx_descriptor->data1 = 0;
1603         tx_descriptor->data2 = 0;
1604         tx_descriptor->data3 = 0;
1605
1606         buffer_info->skb = NULL;
1607         buffer_info->dma_ptr = 0;
1608         buffer_info->buffer_length = 0;
1609         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1610
1611         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1612                           TX_DESC_DATA0_DTYPE_EXT_ |
1613                           TX_DESC_DATA0_EXT_LSO_;
1614
1615         /* data0 will be programmed in one of other frame assembler functions */
1616 }
1617
1618 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1619                                          const skb_frag_t *fragment,
1620                                          unsigned int frame_length)
1621 {
1622         /* called only from within lan743x_tx_xmit_frame
1623          * assuming tx->ring_lock has already been acquired
1624          */
1625         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1626         struct lan743x_tx_buffer_info *buffer_info = NULL;
1627         struct lan743x_adapter *adapter = tx->adapter;
1628         struct device *dev = &adapter->pdev->dev;
1629         unsigned int fragment_length = 0;
1630         dma_addr_t dma_ptr;
1631
1632         fragment_length = skb_frag_size(fragment);
1633         if (!fragment_length)
1634                 return 0;
1635
1636         /* wrap up previous descriptor */
1637         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1638         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1639
1640         /* move to next descriptor */
1641         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1642         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1643         buffer_info = &tx->buffer_info[tx->frame_tail];
1644         dma_ptr = skb_frag_dma_map(dev, fragment,
1645                                    0, fragment_length,
1646                                    DMA_TO_DEVICE);
1647         if (dma_mapping_error(dev, dma_ptr)) {
1648                 int desc_index;
1649
1650                 /* cleanup all previously setup descriptors */
1651                 desc_index = tx->frame_first;
1652                 while (desc_index != tx->frame_tail) {
1653                         lan743x_tx_release_desc(tx, desc_index, true);
1654                         desc_index = lan743x_tx_next_index(tx, desc_index);
1655                 }
1656                 dma_wmb();
1657                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1658                 tx->frame_first = 0;
1659                 tx->frame_data0 = 0;
1660                 tx->frame_tail = 0;
1661                 return -ENOMEM;
1662         }
1663
1664         tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1665         tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1666         tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1667                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1668
1669         buffer_info->skb = NULL;
1670         buffer_info->dma_ptr = dma_ptr;
1671         buffer_info->buffer_length = fragment_length;
1672         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1673         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1674
1675         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1676                           TX_DESC_DATA0_DTYPE_DATA_ |
1677                           TX_DESC_DATA0_FCS_;
1678
1679         /* data0 will be programmed in one of other frame assembler functions */
1680         return 0;
1681 }
1682
1683 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1684                                  struct sk_buff *skb,
1685                                  bool time_stamp,
1686                                  bool ignore_sync)
1687 {
1688         /* called only from within lan743x_tx_xmit_frame
1689          * assuming tx->ring_lock has already been acquired
1690          */
1691         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1692         struct lan743x_tx_buffer_info *buffer_info = NULL;
1693         struct lan743x_adapter *adapter = tx->adapter;
1694         u32 tx_tail_flags = 0;
1695
1696         /* wrap up previous descriptor */
1697         if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1698             TX_DESC_DATA0_DTYPE_DATA_) {
1699                 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1700                 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1701         }
1702
1703         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1704         buffer_info = &tx->buffer_info[tx->frame_tail];
1705         buffer_info->skb = skb;
1706         if (time_stamp)
1707                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1708         if (ignore_sync)
1709                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1710
1711         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1712         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1713         tx->last_tail = tx->frame_tail;
1714
1715         dma_wmb();
1716
1717         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1718                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1719         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1720                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1721                 TX_TAIL_SET_TOP_INT_EN_;
1722
1723         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1724                           tx_tail_flags | tx->frame_tail);
1725         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1726 }
1727
1728 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1729                                          struct sk_buff *skb)
1730 {
1731         int required_number_of_descriptors = 0;
1732         unsigned int start_frame_length = 0;
1733         unsigned int frame_length = 0;
1734         unsigned int head_length = 0;
1735         unsigned long irq_flags = 0;
1736         bool do_timestamp = false;
1737         bool ignore_sync = false;
1738         int nr_frags = 0;
1739         bool gso = false;
1740         int j;
1741
1742         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1743
1744         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1745         if (required_number_of_descriptors >
1746                 lan743x_tx_get_avail_desc(tx)) {
1747                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1748                         dev_kfree_skb_irq(skb);
1749                 } else {
1750                         /* save to overflow buffer */
1751                         tx->overflow_skb = skb;
1752                         netif_stop_queue(tx->adapter->netdev);
1753                 }
1754                 goto unlock;
1755         }
1756
1757         /* space available, transmit skb  */
1758         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1759             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1760             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1761                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1762                 do_timestamp = true;
1763                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1764                         ignore_sync = true;
1765         }
1766         head_length = skb_headlen(skb);
1767         frame_length = skb_pagelen(skb);
1768         nr_frags = skb_shinfo(skb)->nr_frags;
1769         start_frame_length = frame_length;
1770         gso = skb_is_gso(skb);
1771         if (gso) {
1772                 start_frame_length = max(skb_shinfo(skb)->gso_size,
1773                                          (unsigned short)8);
1774         }
1775
1776         if (lan743x_tx_frame_start(tx,
1777                                    skb->data, head_length,
1778                                    start_frame_length,
1779                                    do_timestamp,
1780                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
1781                 dev_kfree_skb_irq(skb);
1782                 goto unlock;
1783         }
1784         tx->frame_count++;
1785
1786         if (gso)
1787                 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1788
1789         if (nr_frags <= 0)
1790                 goto finish;
1791
1792         for (j = 0; j < nr_frags; j++) {
1793                 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1794
1795                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1796                         /* upon error no need to call
1797                          *      lan743x_tx_frame_end
1798                          * frame assembler clean up was performed inside
1799                          *      lan743x_tx_frame_add_fragment
1800                          */
1801                         dev_kfree_skb_irq(skb);
1802                         goto unlock;
1803                 }
1804         }
1805
1806 finish:
1807         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1808
1809 unlock:
1810         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1811         return NETDEV_TX_OK;
1812 }
1813
1814 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1815 {
1816         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1817         struct lan743x_adapter *adapter = tx->adapter;
1818         bool start_transmitter = false;
1819         unsigned long irq_flags = 0;
1820         u32 ioc_bit = 0;
1821
1822         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1823         lan743x_csr_read(adapter, DMAC_INT_STS);
1824         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1825                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1826         spin_lock_irqsave(&tx->ring_lock, irq_flags);
1827
1828         /* clean up tx ring */
1829         lan743x_tx_release_completed_descriptors(tx);
1830         if (netif_queue_stopped(adapter->netdev)) {
1831                 if (tx->overflow_skb) {
1832                         if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1833                                 lan743x_tx_get_avail_desc(tx))
1834                                 start_transmitter = true;
1835                 } else {
1836                         netif_wake_queue(adapter->netdev);
1837                 }
1838         }
1839         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1840
1841         if (start_transmitter) {
1842                 /* space is now available, transmit overflow skb */
1843                 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1844                 tx->overflow_skb = NULL;
1845                 netif_wake_queue(adapter->netdev);
1846         }
1847
1848         if (!napi_complete(napi))
1849                 goto done;
1850
1851         /* enable isr */
1852         lan743x_csr_write(adapter, INT_EN_SET,
1853                           INT_BIT_DMA_TX_(tx->channel_number));
1854         lan743x_csr_read(adapter, INT_STS);
1855
1856 done:
1857         return 0;
1858 }
1859
1860 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1861 {
1862         if (tx->head_cpu_ptr) {
1863                 dma_free_coherent(&tx->adapter->pdev->dev,
1864                                   sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1865                                   tx->head_dma_ptr);
1866                 tx->head_cpu_ptr = NULL;
1867                 tx->head_dma_ptr = 0;
1868         }
1869         kfree(tx->buffer_info);
1870         tx->buffer_info = NULL;
1871
1872         if (tx->ring_cpu_ptr) {
1873                 dma_free_coherent(&tx->adapter->pdev->dev,
1874                                   tx->ring_allocation_size, tx->ring_cpu_ptr,
1875                                   tx->ring_dma_ptr);
1876                 tx->ring_allocation_size = 0;
1877                 tx->ring_cpu_ptr = NULL;
1878                 tx->ring_dma_ptr = 0;
1879         }
1880         tx->ring_size = 0;
1881 }
1882
1883 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1884 {
1885         size_t ring_allocation_size = 0;
1886         void *cpu_ptr = NULL;
1887         dma_addr_t dma_ptr;
1888         int ret = -ENOMEM;
1889
1890         tx->ring_size = LAN743X_TX_RING_SIZE;
1891         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1892                 ret = -EINVAL;
1893                 goto cleanup;
1894         }
1895         if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
1896                                       DMA_BIT_MASK(64))) {
1897                 dev_warn(&tx->adapter->pdev->dev,
1898                          "lan743x_: No suitable DMA available\n");
1899                 ret = -ENOMEM;
1900                 goto cleanup;
1901         }
1902         ring_allocation_size = ALIGN(tx->ring_size *
1903                                      sizeof(struct lan743x_tx_descriptor),
1904                                      PAGE_SIZE);
1905         dma_ptr = 0;
1906         cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1907                                      ring_allocation_size, &dma_ptr, GFP_KERNEL);
1908         if (!cpu_ptr) {
1909                 ret = -ENOMEM;
1910                 goto cleanup;
1911         }
1912
1913         tx->ring_allocation_size = ring_allocation_size;
1914         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1915         tx->ring_dma_ptr = dma_ptr;
1916
1917         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1918         if (!cpu_ptr) {
1919                 ret = -ENOMEM;
1920                 goto cleanup;
1921         }
1922         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1923         dma_ptr = 0;
1924         cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1925                                      sizeof(*tx->head_cpu_ptr), &dma_ptr,
1926                                      GFP_KERNEL);
1927         if (!cpu_ptr) {
1928                 ret = -ENOMEM;
1929                 goto cleanup;
1930         }
1931
1932         tx->head_cpu_ptr = cpu_ptr;
1933         tx->head_dma_ptr = dma_ptr;
1934         if (tx->head_dma_ptr & 0x3) {
1935                 ret = -ENOMEM;
1936                 goto cleanup;
1937         }
1938
1939         return 0;
1940
1941 cleanup:
1942         lan743x_tx_ring_cleanup(tx);
1943         return ret;
1944 }
1945
1946 static void lan743x_tx_close(struct lan743x_tx *tx)
1947 {
1948         struct lan743x_adapter *adapter = tx->adapter;
1949
1950         lan743x_csr_write(adapter,
1951                           DMAC_CMD,
1952                           DMAC_CMD_STOP_T_(tx->channel_number));
1953         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1954
1955         lan743x_csr_write(adapter,
1956                           DMAC_INT_EN_CLR,
1957                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1958         lan743x_csr_write(adapter, INT_EN_CLR,
1959                           INT_BIT_DMA_TX_(tx->channel_number));
1960         napi_disable(&tx->napi);
1961         netif_napi_del(&tx->napi);
1962
1963         lan743x_csr_write(adapter, FCT_TX_CTL,
1964                           FCT_TX_CTL_DIS_(tx->channel_number));
1965         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1966                                  FCT_TX_CTL_EN_(tx->channel_number),
1967                                  0, 1000, 20000, 100);
1968
1969         lan743x_tx_release_all_descriptors(tx);
1970
1971         if (tx->overflow_skb) {
1972                 dev_kfree_skb(tx->overflow_skb);
1973                 tx->overflow_skb = NULL;
1974         }
1975
1976         lan743x_tx_ring_cleanup(tx);
1977 }
1978
1979 static int lan743x_tx_open(struct lan743x_tx *tx)
1980 {
1981         struct lan743x_adapter *adapter = NULL;
1982         u32 data = 0;
1983         int ret;
1984
1985         adapter = tx->adapter;
1986         ret = lan743x_tx_ring_init(tx);
1987         if (ret)
1988                 return ret;
1989
1990         /* initialize fifo */
1991         lan743x_csr_write(adapter, FCT_TX_CTL,
1992                           FCT_TX_CTL_RESET_(tx->channel_number));
1993         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1994                                  FCT_TX_CTL_RESET_(tx->channel_number),
1995                                  0, 1000, 20000, 100);
1996
1997         /* enable fifo */
1998         lan743x_csr_write(adapter, FCT_TX_CTL,
1999                           FCT_TX_CTL_EN_(tx->channel_number));
2000
2001         /* reset tx channel */
2002         lan743x_csr_write(adapter, DMAC_CMD,
2003                           DMAC_CMD_TX_SWR_(tx->channel_number));
2004         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2005                                  DMAC_CMD_TX_SWR_(tx->channel_number),
2006                                  0, 1000, 20000, 100);
2007
2008         /* Write TX_BASE_ADDR */
2009         lan743x_csr_write(adapter,
2010                           TX_BASE_ADDRH(tx->channel_number),
2011                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
2012         lan743x_csr_write(adapter,
2013                           TX_BASE_ADDRL(tx->channel_number),
2014                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
2015
2016         /* Write TX_CFG_B */
2017         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
2018         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
2019         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
2020         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2021                 data |= TX_CFG_B_TDMABL_512_;
2022         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
2023
2024         /* Write TX_CFG_A */
2025         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
2026         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2027                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
2028                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
2029                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
2030                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
2031         }
2032         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
2033
2034         /* Write TX_HEAD_WRITEBACK_ADDR */
2035         lan743x_csr_write(adapter,
2036                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
2037                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
2038         lan743x_csr_write(adapter,
2039                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
2040                           DMA_ADDR_LOW32(tx->head_dma_ptr));
2041
2042         /* set last head */
2043         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
2044
2045         /* write TX_TAIL */
2046         tx->last_tail = 0;
2047         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
2048                           (u32)(tx->last_tail));
2049         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2050                                                          INT_BIT_DMA_TX_
2051                                                          (tx->channel_number));
2052         netif_napi_add_tx_weight(adapter->netdev,
2053                                  &tx->napi, lan743x_tx_napi_poll,
2054                                  tx->ring_size - 1);
2055         napi_enable(&tx->napi);
2056
2057         data = 0;
2058         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2059                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
2060         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2061                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
2062         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2063                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
2064         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2065                 data |= TX_CFG_C_TX_INT_EN_R2C_;
2066         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
2067
2068         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
2069                 lan743x_csr_write(adapter, INT_EN_SET,
2070                                   INT_BIT_DMA_TX_(tx->channel_number));
2071         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2072                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
2073
2074         /*  start dmac channel */
2075         lan743x_csr_write(adapter, DMAC_CMD,
2076                           DMAC_CMD_START_T_(tx->channel_number));
2077         return 0;
2078 }
2079
2080 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
2081 {
2082         return ((++index) % rx->ring_size);
2083 }
2084
2085 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
2086 {
2087         /* update the tail once per 8 descriptors */
2088         if ((index & 7) == 7)
2089                 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
2090                                   index);
2091 }
2092
2093 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
2094                                         gfp_t gfp)
2095 {
2096         struct net_device *netdev = rx->adapter->netdev;
2097         struct device *dev = &rx->adapter->pdev->dev;
2098         struct lan743x_rx_buffer_info *buffer_info;
2099         unsigned int buffer_length, used_length;
2100         struct lan743x_rx_descriptor *descriptor;
2101         struct sk_buff *skb;
2102         dma_addr_t dma_ptr;
2103
2104         buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
2105
2106         descriptor = &rx->ring_cpu_ptr[index];
2107         buffer_info = &rx->buffer_info[index];
2108         skb = __netdev_alloc_skb(netdev, buffer_length, gfp);
2109         if (!skb)
2110                 return -ENOMEM;
2111         dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
2112         if (dma_mapping_error(dev, dma_ptr)) {
2113                 dev_kfree_skb_any(skb);
2114                 return -ENOMEM;
2115         }
2116         if (buffer_info->dma_ptr) {
2117                 /* sync used area of buffer only */
2118                 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
2119                         /* frame length is valid only if LS bit is set.
2120                          * it's a safe upper bound for the used area in this
2121                          * buffer.
2122                          */
2123                         used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
2124                                           (le32_to_cpu(descriptor->data0)),
2125                                           buffer_info->buffer_length);
2126                 else
2127                         used_length = buffer_info->buffer_length;
2128                 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
2129                                         used_length,
2130                                         DMA_FROM_DEVICE);
2131                 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
2132                                        buffer_info->buffer_length,
2133                                        DMA_FROM_DEVICE,
2134                                        DMA_ATTR_SKIP_CPU_SYNC);
2135         }
2136
2137         buffer_info->skb = skb;
2138         buffer_info->dma_ptr = dma_ptr;
2139         buffer_info->buffer_length = buffer_length;
2140         descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2141         descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2142         descriptor->data3 = 0;
2143         descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2144                             (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2145         lan743x_rx_update_tail(rx, index);
2146
2147         return 0;
2148 }
2149
2150 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
2151 {
2152         struct lan743x_rx_buffer_info *buffer_info;
2153         struct lan743x_rx_descriptor *descriptor;
2154
2155         descriptor = &rx->ring_cpu_ptr[index];
2156         buffer_info = &rx->buffer_info[index];
2157
2158         descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2159         descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2160         descriptor->data3 = 0;
2161         descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2162                             ((buffer_info->buffer_length) &
2163                             RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2164         lan743x_rx_update_tail(rx, index);
2165 }
2166
2167 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2168 {
2169         struct lan743x_rx_buffer_info *buffer_info;
2170         struct lan743x_rx_descriptor *descriptor;
2171
2172         descriptor = &rx->ring_cpu_ptr[index];
2173         buffer_info = &rx->buffer_info[index];
2174
2175         memset(descriptor, 0, sizeof(*descriptor));
2176
2177         if (buffer_info->dma_ptr) {
2178                 dma_unmap_single(&rx->adapter->pdev->dev,
2179                                  buffer_info->dma_ptr,
2180                                  buffer_info->buffer_length,
2181                                  DMA_FROM_DEVICE);
2182                 buffer_info->dma_ptr = 0;
2183         }
2184
2185         if (buffer_info->skb) {
2186                 dev_kfree_skb(buffer_info->skb);
2187                 buffer_info->skb = NULL;
2188         }
2189
2190         memset(buffer_info, 0, sizeof(*buffer_info));
2191 }
2192
2193 static struct sk_buff *
2194 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2195 {
2196         if (skb_linearize(skb)) {
2197                 dev_kfree_skb_irq(skb);
2198                 return NULL;
2199         }
2200         frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2201         if (skb->len > frame_length) {
2202                 skb->tail -= skb->len - frame_length;
2203                 skb->len = frame_length;
2204         }
2205         return skb;
2206 }
2207
2208 static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2209 {
2210         int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2211         struct lan743x_rx_descriptor *descriptor, *desc_ext;
2212         struct net_device *netdev = rx->adapter->netdev;
2213         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2214         struct lan743x_rx_buffer_info *buffer_info;
2215         int frame_length, buffer_length;
2216         int extension_index = -1;
2217         bool is_last, is_first;
2218         struct sk_buff *skb;
2219
2220         if (current_head_index < 0 || current_head_index >= rx->ring_size)
2221                 goto done;
2222
2223         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2224                 goto done;
2225
2226         if (rx->last_head == current_head_index)
2227                 goto done;
2228
2229         descriptor = &rx->ring_cpu_ptr[rx->last_head];
2230         if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2231                 goto done;
2232         buffer_info = &rx->buffer_info[rx->last_head];
2233
2234         is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2235         is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2236
2237         if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2238                 /* extension is expected to follow */
2239                 int index = lan743x_rx_next_index(rx, rx->last_head);
2240
2241                 if (index == current_head_index)
2242                         /* extension not yet available */
2243                         goto done;
2244                 desc_ext = &rx->ring_cpu_ptr[index];
2245                 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2246                         /* extension not yet available */
2247                         goto done;
2248                 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2249                         goto move_forward;
2250                 extension_index = index;
2251         }
2252
2253         /* Only the last buffer in a multi-buffer frame contains the total frame
2254          * length. The chip occasionally sends more buffers than strictly
2255          * required to reach the total frame length.
2256          * Handle this by adding all buffers to the skb in their entirety.
2257          * Once the real frame length is known, trim the skb.
2258          */
2259         frame_length =
2260                 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2261         buffer_length = buffer_info->buffer_length;
2262
2263         netdev_dbg(netdev, "%s%schunk: %d/%d",
2264                    is_first ? "first " : "      ",
2265                    is_last  ? "last  " : "      ",
2266                    frame_length, buffer_length);
2267
2268         /* save existing skb, allocate new skb and map to dma */
2269         skb = buffer_info->skb;
2270         if (lan743x_rx_init_ring_element(rx, rx->last_head,
2271                                          GFP_ATOMIC | GFP_DMA)) {
2272                 /* failed to allocate next skb.
2273                  * Memory is very low.
2274                  * Drop this packet and reuse buffer.
2275                  */
2276                 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2277                 /* drop packet that was being assembled */
2278                 dev_kfree_skb_irq(rx->skb_head);
2279                 rx->skb_head = NULL;
2280                 goto process_extension;
2281         }
2282
2283         /* add buffers to skb via skb->frag_list */
2284         if (is_first) {
2285                 skb_reserve(skb, RX_HEAD_PADDING);
2286                 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2287                 if (rx->skb_head)
2288                         dev_kfree_skb_irq(rx->skb_head);
2289                 rx->skb_head = skb;
2290         } else if (rx->skb_head) {
2291                 skb_put(skb, buffer_length);
2292                 if (skb_shinfo(rx->skb_head)->frag_list)
2293                         rx->skb_tail->next = skb;
2294                 else
2295                         skb_shinfo(rx->skb_head)->frag_list = skb;
2296                 rx->skb_tail = skb;
2297                 rx->skb_head->len += skb->len;
2298                 rx->skb_head->data_len += skb->len;
2299                 rx->skb_head->truesize += skb->truesize;
2300         } else {
2301                 /* packet to assemble has already been dropped because one or
2302                  * more of its buffers could not be allocated
2303                  */
2304                 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2305                 dev_kfree_skb_irq(skb);
2306         }
2307
2308 process_extension:
2309         if (extension_index >= 0) {
2310                 u32 ts_sec;
2311                 u32 ts_nsec;
2312
2313                 ts_sec = le32_to_cpu(desc_ext->data1);
2314                 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2315                           RX_DESC_DATA2_TS_NS_MASK_);
2316                 if (rx->skb_head)
2317                         skb_hwtstamps(rx->skb_head)->hwtstamp =
2318                                 ktime_set(ts_sec, ts_nsec);
2319                 lan743x_rx_reuse_ring_element(rx, extension_index);
2320                 rx->last_head = extension_index;
2321                 netdev_dbg(netdev, "process extension");
2322         }
2323
2324         if (is_last && rx->skb_head)
2325                 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2326
2327         if (is_last && rx->skb_head) {
2328                 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2329                                                         rx->adapter->netdev);
2330                 netdev_dbg(netdev, "sending %d byte frame to OS",
2331                            rx->skb_head->len);
2332                 napi_gro_receive(&rx->napi, rx->skb_head);
2333                 rx->skb_head = NULL;
2334         }
2335
2336 move_forward:
2337         /* push tail and head forward */
2338         rx->last_tail = rx->last_head;
2339         rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2340         result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2341 done:
2342         return result;
2343 }
2344
2345 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2346 {
2347         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2348         struct lan743x_adapter *adapter = rx->adapter;
2349         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2350         u32 rx_tail_flags = 0;
2351         int count;
2352
2353         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2354                 /* clear int status bit before reading packet */
2355                 lan743x_csr_write(adapter, DMAC_INT_STS,
2356                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2357         }
2358         for (count = 0; count < weight; count++) {
2359                 result = lan743x_rx_process_buffer(rx);
2360                 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2361                         break;
2362         }
2363         rx->frame_count += count;
2364         if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2365                 return weight;
2366
2367         if (!napi_complete_done(napi, count))
2368                 return count;
2369
2370         /* re-arm interrupts, must write to rx tail on some chip variants */
2371         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2372                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2373         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2374                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2375         } else {
2376                 lan743x_csr_write(adapter, INT_EN_SET,
2377                                   INT_BIT_DMA_RX_(rx->channel_number));
2378         }
2379
2380         if (rx_tail_flags)
2381                 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2382                                   rx_tail_flags | rx->last_tail);
2383
2384         return count;
2385 }
2386
2387 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2388 {
2389         if (rx->buffer_info && rx->ring_cpu_ptr) {
2390                 int index;
2391
2392                 for (index = 0; index < rx->ring_size; index++)
2393                         lan743x_rx_release_ring_element(rx, index);
2394         }
2395
2396         if (rx->head_cpu_ptr) {
2397                 dma_free_coherent(&rx->adapter->pdev->dev,
2398                                   sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2399                                   rx->head_dma_ptr);
2400                 rx->head_cpu_ptr = NULL;
2401                 rx->head_dma_ptr = 0;
2402         }
2403
2404         kfree(rx->buffer_info);
2405         rx->buffer_info = NULL;
2406
2407         if (rx->ring_cpu_ptr) {
2408                 dma_free_coherent(&rx->adapter->pdev->dev,
2409                                   rx->ring_allocation_size, rx->ring_cpu_ptr,
2410                                   rx->ring_dma_ptr);
2411                 rx->ring_allocation_size = 0;
2412                 rx->ring_cpu_ptr = NULL;
2413                 rx->ring_dma_ptr = 0;
2414         }
2415
2416         rx->ring_size = 0;
2417         rx->last_head = 0;
2418 }
2419
2420 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2421 {
2422         size_t ring_allocation_size = 0;
2423         dma_addr_t dma_ptr = 0;
2424         void *cpu_ptr = NULL;
2425         int ret = -ENOMEM;
2426         int index = 0;
2427
2428         rx->ring_size = LAN743X_RX_RING_SIZE;
2429         if (rx->ring_size <= 1) {
2430                 ret = -EINVAL;
2431                 goto cleanup;
2432         }
2433         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2434                 ret = -EINVAL;
2435                 goto cleanup;
2436         }
2437         if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2438                                       DMA_BIT_MASK(64))) {
2439                 dev_warn(&rx->adapter->pdev->dev,
2440                          "lan743x_: No suitable DMA available\n");
2441                 ret = -ENOMEM;
2442                 goto cleanup;
2443         }
2444         ring_allocation_size = ALIGN(rx->ring_size *
2445                                      sizeof(struct lan743x_rx_descriptor),
2446                                      PAGE_SIZE);
2447         dma_ptr = 0;
2448         cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2449                                      ring_allocation_size, &dma_ptr, GFP_KERNEL);
2450         if (!cpu_ptr) {
2451                 ret = -ENOMEM;
2452                 goto cleanup;
2453         }
2454         rx->ring_allocation_size = ring_allocation_size;
2455         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2456         rx->ring_dma_ptr = dma_ptr;
2457
2458         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2459                           GFP_KERNEL);
2460         if (!cpu_ptr) {
2461                 ret = -ENOMEM;
2462                 goto cleanup;
2463         }
2464         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2465         dma_ptr = 0;
2466         cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2467                                      sizeof(*rx->head_cpu_ptr), &dma_ptr,
2468                                      GFP_KERNEL);
2469         if (!cpu_ptr) {
2470                 ret = -ENOMEM;
2471                 goto cleanup;
2472         }
2473
2474         rx->head_cpu_ptr = cpu_ptr;
2475         rx->head_dma_ptr = dma_ptr;
2476         if (rx->head_dma_ptr & 0x3) {
2477                 ret = -ENOMEM;
2478                 goto cleanup;
2479         }
2480
2481         rx->last_head = 0;
2482         for (index = 0; index < rx->ring_size; index++) {
2483                 ret = lan743x_rx_init_ring_element(rx, index, GFP_KERNEL);
2484                 if (ret)
2485                         goto cleanup;
2486         }
2487         return 0;
2488
2489 cleanup:
2490         netif_warn(rx->adapter, ifup, rx->adapter->netdev,
2491                    "Error allocating memory for LAN743x\n");
2492
2493         lan743x_rx_ring_cleanup(rx);
2494         return ret;
2495 }
2496
2497 static void lan743x_rx_close(struct lan743x_rx *rx)
2498 {
2499         struct lan743x_adapter *adapter = rx->adapter;
2500
2501         lan743x_csr_write(adapter, FCT_RX_CTL,
2502                           FCT_RX_CTL_DIS_(rx->channel_number));
2503         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2504                                  FCT_RX_CTL_EN_(rx->channel_number),
2505                                  0, 1000, 20000, 100);
2506
2507         lan743x_csr_write(adapter, DMAC_CMD,
2508                           DMAC_CMD_STOP_R_(rx->channel_number));
2509         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2510
2511         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2512                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2513         lan743x_csr_write(adapter, INT_EN_CLR,
2514                           INT_BIT_DMA_RX_(rx->channel_number));
2515         napi_disable(&rx->napi);
2516
2517         netif_napi_del(&rx->napi);
2518
2519         lan743x_rx_ring_cleanup(rx);
2520 }
2521
2522 static int lan743x_rx_open(struct lan743x_rx *rx)
2523 {
2524         struct lan743x_adapter *adapter = rx->adapter;
2525         u32 data = 0;
2526         int ret;
2527
2528         rx->frame_count = 0;
2529         ret = lan743x_rx_ring_init(rx);
2530         if (ret)
2531                 goto return_error;
2532
2533         netif_napi_add(adapter->netdev,
2534                        &rx->napi, lan743x_rx_napi_poll,
2535                        NAPI_POLL_WEIGHT);
2536
2537         lan743x_csr_write(adapter, DMAC_CMD,
2538                           DMAC_CMD_RX_SWR_(rx->channel_number));
2539         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2540                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2541                                  0, 1000, 20000, 100);
2542
2543         /* set ring base address */
2544         lan743x_csr_write(adapter,
2545                           RX_BASE_ADDRH(rx->channel_number),
2546                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2547         lan743x_csr_write(adapter,
2548                           RX_BASE_ADDRL(rx->channel_number),
2549                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2550
2551         /* set rx write back address */
2552         lan743x_csr_write(adapter,
2553                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2554                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2555         lan743x_csr_write(adapter,
2556                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2557                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2558         data = RX_CFG_A_RX_HP_WB_EN_;
2559         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2560                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2561                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2562                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2563                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2564         }
2565
2566         /* set RX_CFG_A */
2567         lan743x_csr_write(adapter,
2568                           RX_CFG_A(rx->channel_number), data);
2569
2570         /* set RX_CFG_B */
2571         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2572         data &= ~RX_CFG_B_RX_PAD_MASK_;
2573         if (!RX_HEAD_PADDING)
2574                 data |= RX_CFG_B_RX_PAD_0_;
2575         else
2576                 data |= RX_CFG_B_RX_PAD_2_;
2577         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2578         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2579         data |= RX_CFG_B_TS_ALL_RX_;
2580         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2581                 data |= RX_CFG_B_RDMABL_512_;
2582
2583         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2584         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2585                                                          INT_BIT_DMA_RX_
2586                                                          (rx->channel_number));
2587
2588         /* set RX_CFG_C */
2589         data = 0;
2590         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2591                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2592         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2593                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2594         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2595                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2596         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2597                 data |= RX_CFG_C_RX_INT_EN_R2C_;
2598         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2599
2600         rx->last_tail = ((u32)(rx->ring_size - 1));
2601         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2602                           rx->last_tail);
2603         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2604         if (rx->last_head) {
2605                 ret = -EIO;
2606                 goto napi_delete;
2607         }
2608
2609         napi_enable(&rx->napi);
2610
2611         lan743x_csr_write(adapter, INT_EN_SET,
2612                           INT_BIT_DMA_RX_(rx->channel_number));
2613         lan743x_csr_write(adapter, DMAC_INT_STS,
2614                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2615         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2616                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2617         lan743x_csr_write(adapter, DMAC_CMD,
2618                           DMAC_CMD_START_R_(rx->channel_number));
2619
2620         /* initialize fifo */
2621         lan743x_csr_write(adapter, FCT_RX_CTL,
2622                           FCT_RX_CTL_RESET_(rx->channel_number));
2623         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2624                                  FCT_RX_CTL_RESET_(rx->channel_number),
2625                                  0, 1000, 20000, 100);
2626         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2627                           FCT_FLOW_CTL_REQ_EN_ |
2628                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2629                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2630
2631         /* enable fifo */
2632         lan743x_csr_write(adapter, FCT_RX_CTL,
2633                           FCT_RX_CTL_EN_(rx->channel_number));
2634         return 0;
2635
2636 napi_delete:
2637         netif_napi_del(&rx->napi);
2638         lan743x_rx_ring_cleanup(rx);
2639
2640 return_error:
2641         return ret;
2642 }
2643
2644 static int lan743x_netdev_close(struct net_device *netdev)
2645 {
2646         struct lan743x_adapter *adapter = netdev_priv(netdev);
2647         int index;
2648
2649         for (index = 0; index < adapter->used_tx_channels; index++)
2650                 lan743x_tx_close(&adapter->tx[index]);
2651
2652         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2653                 lan743x_rx_close(&adapter->rx[index]);
2654
2655         lan743x_ptp_close(adapter);
2656
2657         lan743x_phy_close(adapter);
2658
2659         lan743x_mac_close(adapter);
2660
2661         lan743x_intr_close(adapter);
2662
2663         return 0;
2664 }
2665
2666 static int lan743x_netdev_open(struct net_device *netdev)
2667 {
2668         struct lan743x_adapter *adapter = netdev_priv(netdev);
2669         int index;
2670         int ret;
2671
2672         ret = lan743x_intr_open(adapter);
2673         if (ret)
2674                 goto return_error;
2675
2676         ret = lan743x_mac_open(adapter);
2677         if (ret)
2678                 goto close_intr;
2679
2680         ret = lan743x_phy_open(adapter);
2681         if (ret)
2682                 goto close_mac;
2683
2684         ret = lan743x_ptp_open(adapter);
2685         if (ret)
2686                 goto close_phy;
2687
2688         lan743x_rfe_open(adapter);
2689
2690         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2691                 ret = lan743x_rx_open(&adapter->rx[index]);
2692                 if (ret)
2693                         goto close_rx;
2694         }
2695
2696         for (index = 0; index < adapter->used_tx_channels; index++) {
2697                 ret = lan743x_tx_open(&adapter->tx[index]);
2698                 if (ret)
2699                         goto close_tx;
2700         }
2701         return 0;
2702
2703 close_tx:
2704         for (index = 0; index < adapter->used_tx_channels; index++) {
2705                 if (adapter->tx[index].ring_cpu_ptr)
2706                         lan743x_tx_close(&adapter->tx[index]);
2707         }
2708
2709 close_rx:
2710         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2711                 if (adapter->rx[index].ring_cpu_ptr)
2712                         lan743x_rx_close(&adapter->rx[index]);
2713         }
2714         lan743x_ptp_close(adapter);
2715
2716 close_phy:
2717         lan743x_phy_close(adapter);
2718
2719 close_mac:
2720         lan743x_mac_close(adapter);
2721
2722 close_intr:
2723         lan743x_intr_close(adapter);
2724
2725 return_error:
2726         netif_warn(adapter, ifup, adapter->netdev,
2727                    "Error opening LAN743x\n");
2728         return ret;
2729 }
2730
2731 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2732                                              struct net_device *netdev)
2733 {
2734         struct lan743x_adapter *adapter = netdev_priv(netdev);
2735         u8 ch = 0;
2736
2737         if (adapter->is_pci11x1x)
2738                 ch = skb->queue_mapping % PCI11X1X_USED_TX_CHANNELS;
2739
2740         return lan743x_tx_xmit_frame(&adapter->tx[ch], skb);
2741 }
2742
2743 static int lan743x_netdev_ioctl(struct net_device *netdev,
2744                                 struct ifreq *ifr, int cmd)
2745 {
2746         if (!netif_running(netdev))
2747                 return -EINVAL;
2748         if (cmd == SIOCSHWTSTAMP)
2749                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2750         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2751 }
2752
2753 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2754 {
2755         struct lan743x_adapter *adapter = netdev_priv(netdev);
2756
2757         lan743x_rfe_set_multicast(adapter);
2758 }
2759
2760 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2761 {
2762         struct lan743x_adapter *adapter = netdev_priv(netdev);
2763         int ret = 0;
2764
2765         ret = lan743x_mac_set_mtu(adapter, new_mtu);
2766         if (!ret)
2767                 netdev->mtu = new_mtu;
2768         return ret;
2769 }
2770
2771 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2772                                        struct rtnl_link_stats64 *stats)
2773 {
2774         struct lan743x_adapter *adapter = netdev_priv(netdev);
2775
2776         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2777         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2778         stats->rx_bytes = lan743x_csr_read(adapter,
2779                                            STAT_RX_UNICAST_BYTE_COUNT) +
2780                           lan743x_csr_read(adapter,
2781                                            STAT_RX_BROADCAST_BYTE_COUNT) +
2782                           lan743x_csr_read(adapter,
2783                                            STAT_RX_MULTICAST_BYTE_COUNT);
2784         stats->tx_bytes = lan743x_csr_read(adapter,
2785                                            STAT_TX_UNICAST_BYTE_COUNT) +
2786                           lan743x_csr_read(adapter,
2787                                            STAT_TX_BROADCAST_BYTE_COUNT) +
2788                           lan743x_csr_read(adapter,
2789                                            STAT_TX_MULTICAST_BYTE_COUNT);
2790         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2791                            lan743x_csr_read(adapter,
2792                                             STAT_RX_ALIGNMENT_ERRORS) +
2793                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2794                            lan743x_csr_read(adapter,
2795                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2796                            lan743x_csr_read(adapter,
2797                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
2798         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2799                            lan743x_csr_read(adapter,
2800                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2801                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2802         stats->rx_dropped = lan743x_csr_read(adapter,
2803                                              STAT_RX_DROPPED_FRAMES);
2804         stats->tx_dropped = lan743x_csr_read(adapter,
2805                                              STAT_TX_EXCESSIVE_COLLISION);
2806         stats->multicast = lan743x_csr_read(adapter,
2807                                             STAT_RX_MULTICAST_FRAMES) +
2808                            lan743x_csr_read(adapter,
2809                                             STAT_TX_MULTICAST_FRAMES);
2810         stats->collisions = lan743x_csr_read(adapter,
2811                                              STAT_TX_SINGLE_COLLISIONS) +
2812                             lan743x_csr_read(adapter,
2813                                              STAT_TX_MULTIPLE_COLLISIONS) +
2814                             lan743x_csr_read(adapter,
2815                                              STAT_TX_LATE_COLLISIONS);
2816 }
2817
2818 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2819                                           void *addr)
2820 {
2821         struct lan743x_adapter *adapter = netdev_priv(netdev);
2822         struct sockaddr *sock_addr = addr;
2823         int ret;
2824
2825         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2826         if (ret)
2827                 return ret;
2828         eth_hw_addr_set(netdev, sock_addr->sa_data);
2829         lan743x_mac_set_address(adapter, sock_addr->sa_data);
2830         lan743x_rfe_update_mac_address(adapter);
2831         return 0;
2832 }
2833
2834 static const struct net_device_ops lan743x_netdev_ops = {
2835         .ndo_open               = lan743x_netdev_open,
2836         .ndo_stop               = lan743x_netdev_close,
2837         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
2838         .ndo_eth_ioctl          = lan743x_netdev_ioctl,
2839         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
2840         .ndo_change_mtu         = lan743x_netdev_change_mtu,
2841         .ndo_get_stats64        = lan743x_netdev_get_stats64,
2842         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
2843 };
2844
2845 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2846 {
2847         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2848 }
2849
2850 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2851 {
2852         mdiobus_unregister(adapter->mdiobus);
2853 }
2854
2855 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2856 {
2857         unregister_netdev(adapter->netdev);
2858
2859         lan743x_mdiobus_cleanup(adapter);
2860         lan743x_hardware_cleanup(adapter);
2861         lan743x_pci_cleanup(adapter);
2862 }
2863
2864 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2865                                  struct pci_dev *pdev)
2866 {
2867         struct lan743x_tx *tx;
2868         int index;
2869         int ret;
2870
2871         adapter->is_pci11x1x = is_pci11x1x_chip(adapter);
2872         if (adapter->is_pci11x1x) {
2873                 adapter->max_tx_channels = PCI11X1X_MAX_TX_CHANNELS;
2874                 adapter->used_tx_channels = PCI11X1X_USED_TX_CHANNELS;
2875                 adapter->max_vector_count = PCI11X1X_MAX_VECTOR_COUNT;
2876                 pci11x1x_strap_get_status(adapter);
2877                 spin_lock_init(&adapter->eth_syslock_spinlock);
2878         } else {
2879                 adapter->max_tx_channels = LAN743X_MAX_TX_CHANNELS;
2880                 adapter->used_tx_channels = LAN743X_USED_TX_CHANNELS;
2881                 adapter->max_vector_count = LAN743X_MAX_VECTOR_COUNT;
2882         }
2883
2884         adapter->intr.irq = adapter->pdev->irq;
2885         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2886
2887         ret = lan743x_gpio_init(adapter);
2888         if (ret)
2889                 return ret;
2890
2891         ret = lan743x_mac_init(adapter);
2892         if (ret)
2893                 return ret;
2894
2895         ret = lan743x_phy_init(adapter);
2896         if (ret)
2897                 return ret;
2898
2899         ret = lan743x_ptp_init(adapter);
2900         if (ret)
2901                 return ret;
2902
2903         lan743x_rfe_update_mac_address(adapter);
2904
2905         ret = lan743x_dmac_init(adapter);
2906         if (ret)
2907                 return ret;
2908
2909         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2910                 adapter->rx[index].adapter = adapter;
2911                 adapter->rx[index].channel_number = index;
2912         }
2913
2914         for (index = 0; index < adapter->used_tx_channels; index++) {
2915                 tx = &adapter->tx[index];
2916                 tx->adapter = adapter;
2917                 tx->channel_number = index;
2918                 spin_lock_init(&tx->ring_lock);
2919         }
2920
2921         return 0;
2922 }
2923
2924 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2925 {
2926         u32 sgmii_ctl;
2927         int ret;
2928
2929         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2930         if (!(adapter->mdiobus)) {
2931                 ret = -ENOMEM;
2932                 goto return_error;
2933         }
2934
2935         adapter->mdiobus->priv = (void *)adapter;
2936         if (adapter->is_pci11x1x) {
2937                 if (adapter->is_sgmii_en) {
2938                         sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
2939                         sgmii_ctl |= SGMII_CTL_SGMII_ENABLE_;
2940                         sgmii_ctl &= ~SGMII_CTL_SGMII_POWER_DN_;
2941                         lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
2942                         netif_dbg(adapter, drv, adapter->netdev,
2943                                   "SGMII operation\n");
2944                         adapter->mdiobus->probe_capabilities = MDIOBUS_C22_C45;
2945                         adapter->mdiobus->read = lan743x_mdiobus_c45_read;
2946                         adapter->mdiobus->write = lan743x_mdiobus_c45_write;
2947                         adapter->mdiobus->name = "lan743x-mdiobus-c45";
2948                         netif_dbg(adapter, drv, adapter->netdev,
2949                                   "lan743x-mdiobus-c45\n");
2950                 } else {
2951                         sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
2952                         sgmii_ctl &= ~SGMII_CTL_SGMII_ENABLE_;
2953                         sgmii_ctl |= SGMII_CTL_SGMII_POWER_DN_;
2954                         lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
2955                         netif_dbg(adapter, drv, adapter->netdev,
2956                                   "RGMII operation\n");
2957                         // Only C22 support when RGMII I/F
2958                         adapter->mdiobus->probe_capabilities = MDIOBUS_C22;
2959                         adapter->mdiobus->read = lan743x_mdiobus_read;
2960                         adapter->mdiobus->write = lan743x_mdiobus_write;
2961                         adapter->mdiobus->name = "lan743x-mdiobus";
2962                         netif_dbg(adapter, drv, adapter->netdev,
2963                                   "lan743x-mdiobus\n");
2964                 }
2965         } else {
2966                 adapter->mdiobus->read = lan743x_mdiobus_read;
2967                 adapter->mdiobus->write = lan743x_mdiobus_write;
2968                 adapter->mdiobus->name = "lan743x-mdiobus";
2969                 netif_dbg(adapter, drv, adapter->netdev, "lan743x-mdiobus\n");
2970         }
2971
2972         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2973                  "pci-%s", pci_name(adapter->pdev));
2974
2975         if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2976                 /* LAN7430 uses internal phy at address 1 */
2977                 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2978
2979         /* register mdiobus */
2980         ret = mdiobus_register(adapter->mdiobus);
2981         if (ret < 0)
2982                 goto return_error;
2983         return 0;
2984
2985 return_error:
2986         return ret;
2987 }
2988
2989 /* lan743x_pcidev_probe - Device Initialization Routine
2990  * @pdev: PCI device information struct
2991  * @id: entry in lan743x_pci_tbl
2992  *
2993  * Returns 0 on success, negative on failure
2994  *
2995  * initializes an adapter identified by a pci_dev structure.
2996  * The OS initialization, configuring of the adapter private structure,
2997  * and a hardware reset occur.
2998  **/
2999 static int lan743x_pcidev_probe(struct pci_dev *pdev,
3000                                 const struct pci_device_id *id)
3001 {
3002         struct lan743x_adapter *adapter = NULL;
3003         struct net_device *netdev = NULL;
3004         int ret = -ENODEV;
3005
3006         if (id->device == PCI_DEVICE_ID_SMSC_A011 ||
3007             id->device == PCI_DEVICE_ID_SMSC_A041) {
3008                 netdev = devm_alloc_etherdev_mqs(&pdev->dev,
3009                                                  sizeof(struct lan743x_adapter),
3010                                                  PCI11X1X_USED_TX_CHANNELS,
3011                                                  LAN743X_USED_RX_CHANNELS);
3012         } else {
3013                 netdev = devm_alloc_etherdev(&pdev->dev,
3014                                              sizeof(struct lan743x_adapter));
3015         }
3016
3017         if (!netdev)
3018                 goto return_error;
3019
3020         SET_NETDEV_DEV(netdev, &pdev->dev);
3021         pci_set_drvdata(pdev, netdev);
3022         adapter = netdev_priv(netdev);
3023         adapter->netdev = netdev;
3024         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
3025                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
3026                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
3027         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
3028
3029         of_get_mac_address(pdev->dev.of_node, adapter->mac_address);
3030
3031         ret = lan743x_pci_init(adapter, pdev);
3032         if (ret)
3033                 goto return_error;
3034
3035         ret = lan743x_csr_init(adapter);
3036         if (ret)
3037                 goto cleanup_pci;
3038
3039         ret = lan743x_hardware_init(adapter, pdev);
3040         if (ret)
3041                 goto cleanup_pci;
3042
3043         ret = lan743x_mdiobus_init(adapter);
3044         if (ret)
3045                 goto cleanup_hardware;
3046
3047         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
3048         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
3049         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
3050         adapter->netdev->hw_features = adapter->netdev->features;
3051
3052         /* carrier off reporting is important to ethtool even BEFORE open */
3053         netif_carrier_off(netdev);
3054
3055         ret = register_netdev(adapter->netdev);
3056         if (ret < 0)
3057                 goto cleanup_mdiobus;
3058         return 0;
3059
3060 cleanup_mdiobus:
3061         lan743x_mdiobus_cleanup(adapter);
3062
3063 cleanup_hardware:
3064         lan743x_hardware_cleanup(adapter);
3065
3066 cleanup_pci:
3067         lan743x_pci_cleanup(adapter);
3068
3069 return_error:
3070         pr_warn("Initialization failed\n");
3071         return ret;
3072 }
3073
3074 /**
3075  * lan743x_pcidev_remove - Device Removal Routine
3076  * @pdev: PCI device information struct
3077  *
3078  * this is called by the PCI subsystem to alert the driver
3079  * that it should release a PCI device.  This could be caused by a
3080  * Hot-Plug event, or because the driver is going to be removed from
3081  * memory.
3082  **/
3083 static void lan743x_pcidev_remove(struct pci_dev *pdev)
3084 {
3085         struct net_device *netdev = pci_get_drvdata(pdev);
3086         struct lan743x_adapter *adapter = netdev_priv(netdev);
3087
3088         lan743x_full_cleanup(adapter);
3089 }
3090
3091 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
3092 {
3093         struct net_device *netdev = pci_get_drvdata(pdev);
3094         struct lan743x_adapter *adapter = netdev_priv(netdev);
3095
3096         rtnl_lock();
3097         netif_device_detach(netdev);
3098
3099         /* close netdev when netdev is at running state.
3100          * For instance, it is true when system goes to sleep by pm-suspend
3101          * However, it is false when system goes to sleep by suspend GUI menu
3102          */
3103         if (netif_running(netdev))
3104                 lan743x_netdev_close(netdev);
3105         rtnl_unlock();
3106
3107 #ifdef CONFIG_PM
3108         pci_save_state(pdev);
3109 #endif
3110
3111         /* clean up lan743x portion */
3112         lan743x_hardware_cleanup(adapter);
3113 }
3114
3115 #ifdef CONFIG_PM_SLEEP
3116 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
3117 {
3118         return bitrev16(crc16(0xFFFF, buf, len));
3119 }
3120
3121 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
3122 {
3123         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
3124         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
3125         const u8 arp_type[2] = { 0x08, 0x06 };
3126         int mask_index;
3127         u32 sopass;
3128         u32 pmtctl;
3129         u32 wucsr;
3130         u32 macrx;
3131         u16 crc;
3132
3133         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
3134                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
3135
3136         /* clear wake settings */
3137         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
3138         pmtctl |= PMT_CTL_WUPS_MASK_;
3139         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
3140                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
3141                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
3142
3143         macrx = lan743x_csr_read(adapter, MAC_RX);
3144
3145         wucsr = 0;
3146         mask_index = 0;
3147
3148         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
3149
3150         if (adapter->wolopts & WAKE_PHY) {
3151                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
3152                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
3153         }
3154         if (adapter->wolopts & WAKE_MAGIC) {
3155                 wucsr |= MAC_WUCSR_MPEN_;
3156                 macrx |= MAC_RX_RXEN_;
3157                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3158         }
3159         if (adapter->wolopts & WAKE_UCAST) {
3160                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
3161                 macrx |= MAC_RX_RXEN_;
3162                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3163                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3164         }
3165         if (adapter->wolopts & WAKE_BCAST) {
3166                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
3167                 macrx |= MAC_RX_RXEN_;
3168                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3169                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3170         }
3171         if (adapter->wolopts & WAKE_MCAST) {
3172                 /* IPv4 multicast */
3173                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
3174                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3175                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3176                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3177                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
3178                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
3179                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3180                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3181                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3182                 mask_index++;
3183
3184                 /* IPv6 multicast */
3185                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
3186                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3187                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3188                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3189                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
3190                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
3191                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3192                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3193                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3194                 mask_index++;
3195
3196                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3197                 macrx |= MAC_RX_RXEN_;
3198                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3199                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3200         }
3201         if (adapter->wolopts & WAKE_ARP) {
3202                 /* set MAC_WUF_CFG & WUF_MASK
3203                  * for packettype (offset 12,13) = ARP (0x0806)
3204                  */
3205                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
3206                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3207                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
3208                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3209                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
3210                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
3211                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3212                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3213                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3214                 mask_index++;
3215
3216                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3217                 macrx |= MAC_RX_RXEN_;
3218                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3219                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3220         }
3221
3222         if (adapter->wolopts & WAKE_MAGICSECURE) {
3223                 sopass = *(u32 *)adapter->sopass;
3224                 lan743x_csr_write(adapter, MAC_MP_SO_LO, sopass);
3225                 sopass = *(u16 *)&adapter->sopass[4];
3226                 lan743x_csr_write(adapter, MAC_MP_SO_HI, sopass);
3227                 wucsr |= MAC_MP_SO_EN_;
3228         }
3229
3230         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3231         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3232         lan743x_csr_write(adapter, MAC_RX, macrx);
3233 }
3234
3235 static int lan743x_pm_suspend(struct device *dev)
3236 {
3237         struct pci_dev *pdev = to_pci_dev(dev);
3238         struct net_device *netdev = pci_get_drvdata(pdev);
3239         struct lan743x_adapter *adapter = netdev_priv(netdev);
3240         u32 data;
3241
3242         lan743x_pcidev_shutdown(pdev);
3243
3244         /* clear all wakes */
3245         lan743x_csr_write(adapter, MAC_WUCSR, 0);
3246         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3247         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3248
3249         if (adapter->wolopts)
3250                 lan743x_pm_set_wol(adapter);
3251
3252         if (adapter->is_pci11x1x) {
3253                 /* Save HW_CFG to config again in PM resume */
3254                 data = lan743x_csr_read(adapter, HW_CFG);
3255                 adapter->hw_cfg = data;
3256                 data |= (HW_CFG_RST_PROTECT_PCIE_ |
3257                          HW_CFG_D3_RESET_DIS_ |
3258                          HW_CFG_D3_VAUX_OVR_ |
3259                          HW_CFG_HOT_RESET_DIS_ |
3260                          HW_CFG_RST_PROTECT_);
3261                 lan743x_csr_write(adapter, HW_CFG, data);
3262         }
3263
3264         /* Host sets PME_En, put D3hot */
3265         return pci_prepare_to_sleep(pdev);
3266 }
3267
3268 static int lan743x_pm_resume(struct device *dev)
3269 {
3270         struct pci_dev *pdev = to_pci_dev(dev);
3271         struct net_device *netdev = pci_get_drvdata(pdev);
3272         struct lan743x_adapter *adapter = netdev_priv(netdev);
3273         int ret;
3274
3275         pci_set_power_state(pdev, PCI_D0);
3276         pci_restore_state(pdev);
3277         pci_save_state(pdev);
3278
3279         /* Restore HW_CFG that was saved during pm suspend */
3280         if (adapter->is_pci11x1x)
3281                 lan743x_csr_write(adapter, HW_CFG, adapter->hw_cfg);
3282
3283         ret = lan743x_hardware_init(adapter, pdev);
3284         if (ret) {
3285                 netif_err(adapter, probe, adapter->netdev,
3286                           "lan743x_hardware_init returned %d\n", ret);
3287                 lan743x_pci_cleanup(adapter);
3288                 return ret;
3289         }
3290
3291         /* open netdev when netdev is at running state while resume.
3292          * For instance, it is true when system wakesup after pm-suspend
3293          * However, it is false when system wakes up after suspend GUI menu
3294          */
3295         if (netif_running(netdev))
3296                 lan743x_netdev_open(netdev);
3297
3298         netif_device_attach(netdev);
3299         ret = lan743x_csr_read(adapter, MAC_WK_SRC);
3300         netif_info(adapter, drv, adapter->netdev,
3301                    "Wakeup source : 0x%08X\n", ret);
3302
3303         return 0;
3304 }
3305
3306 static const struct dev_pm_ops lan743x_pm_ops = {
3307         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3308 };
3309 #endif /* CONFIG_PM_SLEEP */
3310
3311 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3312         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3313         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3314         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_A011) },
3315         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_A041) },
3316         { 0, }
3317 };
3318
3319 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3320
3321 static struct pci_driver lan743x_pcidev_driver = {
3322         .name     = DRIVER_NAME,
3323         .id_table = lan743x_pcidev_tbl,
3324         .probe    = lan743x_pcidev_probe,
3325         .remove   = lan743x_pcidev_remove,
3326 #ifdef CONFIG_PM_SLEEP
3327         .driver.pm = &lan743x_pm_ops,
3328 #endif
3329         .shutdown = lan743x_pcidev_shutdown,
3330 };
3331
3332 module_pci_driver(lan743x_pcidev_driver);
3333
3334 MODULE_AUTHOR(DRIVER_AUTHOR);
3335 MODULE_DESCRIPTION(DRIVER_DESC);
3336 MODULE_LICENSE("GPL");