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 #define PCS_POWER_STATE_DOWN    0x6
  26 #define PCS_POWER_STATE_UP      0x4
  27
  28 #define RFE_RD_FIFO_TH_3_DWORDS 0x3
  29
  30 static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter)
  31 {
  32         u32 chip_rev;
  33         u32 cfg_load;
  34         u32 hw_cfg;
  35         u32 strap;
  36         int ret;
  37
  38         /* Timeout = 100 (i.e. 1 sec (10 msce * 100)) */
  39         ret = lan743x_hs_syslock_acquire(adapter, 100);
  40         if (ret < 0) {
  41                 netif_err(adapter, drv, adapter->netdev,
  42                           "Sys Lock acquire failed ret:%d\n", ret);
  43                 return;
  44         }
  45
  46         cfg_load = lan743x_csr_read(adapter, ETH_SYS_CONFIG_LOAD_STARTED_REG);
  47         lan743x_hs_syslock_release(adapter);
  48         hw_cfg = lan743x_csr_read(adapter, HW_CFG);
  49
  50         if (cfg_load & GEN_SYS_LOAD_STARTED_REG_ETH_ ||
  51             hw_cfg & HW_CFG_RST_PROTECT_) {
  52                 strap = lan743x_csr_read(adapter, STRAP_READ);
  53                 if (strap & STRAP_READ_SGMII_EN_)
  54                         adapter->is_sgmii_en = true;
  55                 else
  56                         adapter->is_sgmii_en = false;
  57         } else {
  58                 chip_rev = lan743x_csr_read(adapter, FPGA_REV);
  59                 if (chip_rev) {
  60                         if (chip_rev & FPGA_SGMII_OP)
  61                                 adapter->is_sgmii_en = true;
  62                         else
  63                                 adapter->is_sgmii_en = false;
  64                 } else {
  65                         adapter->is_sgmii_en = false;
  66                 }
  67         }
  68         netif_dbg(adapter, drv, adapter->netdev,
  69                   "SGMII I/F %sable\n", adapter->is_sgmii_en ? "En" : "Dis");
  70 }
  71
  72 static bool is_pci11x1x_chip(struct lan743x_adapter *adapter)
  73 {
  74         struct lan743x_csr *csr = &adapter->csr;
  75         u32 id_rev = csr->id_rev;
  76
  77         if (((id_rev & 0xFFFF0000) == ID_REV_ID_A011_) ||
  78             ((id_rev & 0xFFFF0000) == ID_REV_ID_A041_)) {
  79                 return true;
  80         }
  81         return false;
  82 }
  83
  84 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
  85 {
  86         pci_release_selected_regions(adapter->pdev,
  87                                      pci_select_bars(adapter->pdev,
  88                                                      IORESOURCE_MEM));
  89         pci_disable_device(adapter->pdev);
  90 }
  91
  92 static int lan743x_pci_init(struct lan743x_adapter *adapter,
  93                             struct pci_dev *pdev)
  94 {
  95         unsigned long bars = 0;
  96         int ret;
  97
  98         adapter->pdev = pdev;
  99         ret = pci_enable_device_mem(pdev);
 100         if (ret)
 101                 goto return_error;
 102
 103         netif_info(adapter, probe, adapter->netdev,
 104                    "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
 105                    pdev->vendor, pdev->device);
 106         bars = pci_select_bars(pdev, IORESOURCE_MEM);
 107         if (!test_bit(0, &bars))
 108                 goto disable_device;
 109
 110         ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
 111         if (ret)
 112                 goto disable_device;
 113
 114         pci_set_master(pdev);
 115         return 0;
 116
 117 disable_device:
 118         pci_disable_device(adapter->pdev);
 119
 120 return_error:
 121         return ret;
 122 }
 123
 124 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
 125 {
 126         return ioread32(&adapter->csr.csr_address[offset]);
 127 }
 128
 129 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
 130                        u32 data)
 131 {
 132         iowrite32(data, &adapter->csr.csr_address[offset]);
 133 }
 134
 135 #define LAN743X_CSR_READ_OP(offset)     lan743x_csr_read(adapter, offset)
 136
 137 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
 138 {
 139         u32 data;
 140
 141         data = lan743x_csr_read(adapter, HW_CFG);
 142         data |= HW_CFG_LRST_;
 143         lan743x_csr_write(adapter, HW_CFG, data);
 144
 145         return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
 146                                   !(data & HW_CFG_LRST_), 100000, 10000000);
 147 }
 148
 149 static int lan743x_csr_wait_for_bit_atomic(struct lan743x_adapter *adapter,
 150                                            int offset, u32 bit_mask,
 151                                            int target_value, int udelay_min,
 152                                            int udelay_max, int count)
 153 {
 154         u32 data;
 155
 156         return readx_poll_timeout_atomic(LAN743X_CSR_READ_OP, offset, data,
 157                                          target_value == !!(data & bit_mask),
 158                                          udelay_max, udelay_min * count);
 159 }
 160
 161 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
 162                                     int offset, u32 bit_mask,
 163                                     int target_value, int usleep_min,
 164                                     int usleep_max, int count)
 165 {
 166         u32 data;
 167
 168         return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
 169                                   target_value == !!(data & bit_mask),
 170                                   usleep_max, usleep_min * count);
 171 }
 172
 173 static int lan743x_csr_init(struct lan743x_adapter *adapter)
 174 {
 175         struct lan743x_csr *csr = &adapter->csr;
 176         resource_size_t bar_start, bar_length;
 177
 178         bar_start = pci_resource_start(adapter->pdev, 0);
 179         bar_length = pci_resource_len(adapter->pdev, 0);
 180         csr->csr_address = devm_ioremap(&adapter->pdev->dev,
 181                                         bar_start, bar_length);
 182         if (!csr->csr_address)
 183                 return -ENOMEM;
 184
 185         csr->id_rev = lan743x_csr_read(adapter, ID_REV);
 186         csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
 187         netif_info(adapter, probe, adapter->netdev,
 188                    "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
 189                    csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
 190                    FPGA_REV_GET_MINOR_(csr->fpga_rev));
 191         if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev))
 192                 return -ENODEV;
 193
 194         csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 195         switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
 196         case ID_REV_CHIP_REV_A0_:
 197                 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
 198                 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
 199                 break;
 200         case ID_REV_CHIP_REV_B0_:
 201                 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
 202                 break;
 203         }
 204
 205         return lan743x_csr_light_reset(adapter);
 206 }
 207
 208 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter)
 209 {
 210         struct lan743x_intr *intr = &adapter->intr;
 211
 212         /* disable the interrupt to prevent repeated re-triggering */
 213         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 214         intr->software_isr_flag = true;
 215         wake_up(&intr->software_isr_wq);
 216 }
 217
 218 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
 219 {
 220         struct lan743x_tx *tx = context;
 221         struct lan743x_adapter *adapter = tx->adapter;
 222         bool enable_flag = true;
 223
 224         lan743x_csr_read(adapter, INT_EN_SET);
 225         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 226                 lan743x_csr_write(adapter, INT_EN_CLR,
 227                                   INT_BIT_DMA_TX_(tx->channel_number));
 228         }
 229
 230         if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
 231                 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
 232                 u32 dmac_int_sts;
 233                 u32 dmac_int_en;
 234
 235                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 236                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 237                 else
 238                         dmac_int_sts = ioc_bit;
 239                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 240                         dmac_int_en = lan743x_csr_read(adapter,
 241                                                        DMAC_INT_EN_SET);
 242                 else
 243                         dmac_int_en = ioc_bit;
 244
 245                 dmac_int_en &= ioc_bit;
 246                 dmac_int_sts &= dmac_int_en;
 247                 if (dmac_int_sts & ioc_bit) {
 248                         napi_schedule(&tx->napi);
 249                         enable_flag = false;/* poll func will enable later */
 250                 }
 251         }
 252
 253         if (enable_flag)
 254                 /* enable isr */
 255                 lan743x_csr_write(adapter, INT_EN_SET,
 256                                   INT_BIT_DMA_TX_(tx->channel_number));
 257 }
 258
 259 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
 260 {
 261         struct lan743x_rx *rx = context;
 262         struct lan743x_adapter *adapter = rx->adapter;
 263         bool enable_flag = true;
 264
 265         if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
 266                 lan743x_csr_write(adapter, INT_EN_CLR,
 267                                   INT_BIT_DMA_RX_(rx->channel_number));
 268         }
 269
 270         if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
 271                 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
 272                 u32 dmac_int_sts;
 273                 u32 dmac_int_en;
 274
 275                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
 276                         dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
 277                 else
 278                         dmac_int_sts = rx_frame_bit;
 279                 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
 280                         dmac_int_en = lan743x_csr_read(adapter,
 281                                                        DMAC_INT_EN_SET);
 282                 else
 283                         dmac_int_en = rx_frame_bit;
 284
 285                 dmac_int_en &= rx_frame_bit;
 286                 dmac_int_sts &= dmac_int_en;
 287                 if (dmac_int_sts & rx_frame_bit) {
 288                         napi_schedule(&rx->napi);
 289                         enable_flag = false;/* poll funct will enable later */
 290                 }
 291         }
 292
 293         if (enable_flag) {
 294                 /* enable isr */
 295                 lan743x_csr_write(adapter, INT_EN_SET,
 296                                   INT_BIT_DMA_RX_(rx->channel_number));
 297         }
 298 }
 299
 300 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
 301 {
 302         struct lan743x_adapter *adapter = context;
 303         unsigned int channel;
 304
 305         if (int_sts & INT_BIT_ALL_RX_) {
 306                 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
 307                         channel++) {
 308                         u32 int_bit = INT_BIT_DMA_RX_(channel);
 309
 310                         if (int_sts & int_bit) {
 311                                 lan743x_rx_isr(&adapter->rx[channel],
 312                                                int_bit, flags);
 313                                 int_sts &= ~int_bit;
 314                         }
 315                 }
 316         }
 317         if (int_sts & INT_BIT_ALL_TX_) {
 318                 for (channel = 0; channel < adapter->used_tx_channels;
 319                         channel++) {
 320                         u32 int_bit = INT_BIT_DMA_TX_(channel);
 321
 322                         if (int_sts & int_bit) {
 323                                 lan743x_tx_isr(&adapter->tx[channel],
 324                                                int_bit, flags);
 325                                 int_sts &= ~int_bit;
 326                         }
 327                 }
 328         }
 329         if (int_sts & INT_BIT_ALL_OTHER_) {
 330                 if (int_sts & INT_BIT_SW_GP_) {
 331                         lan743x_intr_software_isr(adapter);
 332                         int_sts &= ~INT_BIT_SW_GP_;
 333                 }
 334                 if (int_sts & INT_BIT_1588_) {
 335                         lan743x_ptp_isr(adapter);
 336                         int_sts &= ~INT_BIT_1588_;
 337                 }
 338         }
 339         if (int_sts)
 340                 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
 341 }
 342
 343 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
 344 {
 345         struct lan743x_vector *vector = ptr;
 346         struct lan743x_adapter *adapter = vector->adapter;
 347         irqreturn_t result = IRQ_NONE;
 348         u32 int_enables;
 349         u32 int_sts;
 350
 351         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
 352                 int_sts = lan743x_csr_read(adapter, INT_STS);
 353         } else if (vector->flags &
 354                    (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
 355                    LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
 356                 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
 357         } else {
 358                 /* use mask as implied status */
 359                 int_sts = vector->int_mask | INT_BIT_MAS_;
 360         }
 361
 362         if (!(int_sts & INT_BIT_MAS_))
 363                 goto irq_done;
 364
 365         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
 366                 /* disable vector interrupt */
 367                 lan743x_csr_write(adapter,
 368                                   INT_VEC_EN_CLR,
 369                                   INT_VEC_EN_(vector->vector_index));
 370
 371         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
 372                 /* disable master interrupt */
 373                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 374
 375         if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
 376                 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
 377         } else {
 378                 /*  use vector mask as implied enable mask */
 379                 int_enables = vector->int_mask;
 380         }
 381
 382         int_sts &= int_enables;
 383         int_sts &= vector->int_mask;
 384         if (int_sts) {
 385                 if (vector->handler) {
 386                         vector->handler(vector->context,
 387                                         int_sts, vector->flags);
 388                 } else {
 389                         /* disable interrupts on this vector */
 390                         lan743x_csr_write(adapter, INT_EN_CLR,
 391                                           vector->int_mask);
 392                 }
 393                 result = IRQ_HANDLED;
 394         }
 395
 396         if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
 397                 /* enable master interrupt */
 398                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 399
 400         if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
 401                 /* enable vector interrupt */
 402                 lan743x_csr_write(adapter,
 403                                   INT_VEC_EN_SET,
 404                                   INT_VEC_EN_(vector->vector_index));
 405 irq_done:
 406         return result;
 407 }
 408
 409 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
 410 {
 411         struct lan743x_intr *intr = &adapter->intr;
 412         int ret;
 413
 414         intr->software_isr_flag = false;
 415
 416         /* enable and activate test interrupt */
 417         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
 418         lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
 419
 420         ret = wait_event_timeout(intr->software_isr_wq,
 421                                  intr->software_isr_flag,
 422                                  msecs_to_jiffies(200));
 423
 424         /* disable test interrupt */
 425         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
 426
 427         return ret > 0 ? 0 : -ENODEV;
 428 }
 429
 430 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
 431                                      int vector_index, u32 flags,
 432                                      u32 int_mask,
 433                                      lan743x_vector_handler handler,
 434                                      void *context)
 435 {
 436         struct lan743x_vector *vector = &adapter->intr.vector_list
 437                                         [vector_index];
 438         int ret;
 439
 440         vector->adapter = adapter;
 441         vector->flags = flags;
 442         vector->vector_index = vector_index;
 443         vector->int_mask = int_mask;
 444         vector->handler = handler;
 445         vector->context = context;
 446
 447         ret = request_irq(vector->irq,
 448                           lan743x_intr_entry_isr,
 449                           (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
 450                           IRQF_SHARED : 0, DRIVER_NAME, vector);
 451         if (ret) {
 452                 vector->handler = NULL;
 453                 vector->context = NULL;
 454                 vector->int_mask = 0;
 455                 vector->flags = 0;
 456         }
 457         return ret;
 458 }
 459
 460 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
 461                                         int vector_index)
 462 {
 463         struct lan743x_vector *vector = &adapter->intr.vector_list
 464                                         [vector_index];
 465
 466         free_irq(vector->irq, vector);
 467         vector->handler = NULL;
 468         vector->context = NULL;
 469         vector->int_mask = 0;
 470         vector->flags = 0;
 471 }
 472
 473 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
 474                                          u32 int_mask)
 475 {
 476         int index;
 477
 478         for (index = 0; index < adapter->max_vector_count; index++) {
 479                 if (adapter->intr.vector_list[index].int_mask & int_mask)
 480                         return adapter->intr.vector_list[index].flags;
 481         }
 482         return 0;
 483 }
 484
 485 static void lan743x_intr_close(struct lan743x_adapter *adapter)
 486 {
 487         struct lan743x_intr *intr = &adapter->intr;
 488         int index = 0;
 489
 490         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
 491         if (adapter->is_pci11x1x)
 492                 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x0000FFFF);
 493         else
 494                 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
 495
 496         for (index = 0; index < intr->number_of_vectors; index++) {
 497                 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
 498                         lan743x_intr_unregister_isr(adapter, index);
 499                         intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
 500                 }
 501         }
 502
 503         if (intr->flags & INTR_FLAG_MSI_ENABLED) {
 504                 pci_disable_msi(adapter->pdev);
 505                 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
 506         }
 507
 508         if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
 509                 pci_disable_msix(adapter->pdev);
 510                 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
 511         }
 512 }
 513
 514 static int lan743x_intr_open(struct lan743x_adapter *adapter)
 515 {
 516         struct msix_entry msix_entries[PCI11X1X_MAX_VECTOR_COUNT];
 517         struct lan743x_intr *intr = &adapter->intr;
 518         unsigned int used_tx_channels;
 519         u32 int_vec_en_auto_clr = 0;
 520         u8 max_vector_count;
 521         u32 int_vec_map0 = 0;
 522         u32 int_vec_map1 = 0;
 523         int ret = -ENODEV;
 524         int index = 0;
 525         u32 flags = 0;
 526
 527         intr->number_of_vectors = 0;
 528
 529         /* Try to set up MSIX interrupts */
 530         max_vector_count = adapter->max_vector_count;
 531         memset(&msix_entries[0], 0,
 532                sizeof(struct msix_entry) * max_vector_count);
 533         for (index = 0; index < max_vector_count; index++)
 534                 msix_entries[index].entry = index;
 535         used_tx_channels = adapter->used_tx_channels;
 536         ret = pci_enable_msix_range(adapter->pdev,
 537                                     msix_entries, 1,
 538                                     1 + used_tx_channels +
 539                                     LAN743X_USED_RX_CHANNELS);
 540
 541         if (ret > 0) {
 542                 intr->flags |= INTR_FLAG_MSIX_ENABLED;
 543                 intr->number_of_vectors = ret;
 544                 intr->using_vectors = true;
 545                 for (index = 0; index < intr->number_of_vectors; index++)
 546                         intr->vector_list[index].irq = msix_entries
 547                                                        [index].vector;
 548                 netif_info(adapter, ifup, adapter->netdev,
 549                            "using MSIX interrupts, number of vectors = %d\n",
 550                            intr->number_of_vectors);
 551         }
 552
 553         /* If MSIX failed try to setup using MSI interrupts */
 554         if (!intr->number_of_vectors) {
 555                 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 556                         if (!pci_enable_msi(adapter->pdev)) {
 557                                 intr->flags |= INTR_FLAG_MSI_ENABLED;
 558                                 intr->number_of_vectors = 1;
 559                                 intr->using_vectors = true;
 560                                 intr->vector_list[0].irq =
 561                                         adapter->pdev->irq;
 562                                 netif_info(adapter, ifup, adapter->netdev,
 563                                            "using MSI interrupts, number of vectors = %d\n",
 564                                            intr->number_of_vectors);
 565                         }
 566                 }
 567         }
 568
 569         /* If MSIX, and MSI failed, setup using legacy interrupt */
 570         if (!intr->number_of_vectors) {
 571                 intr->number_of_vectors = 1;
 572                 intr->using_vectors = false;
 573                 intr->vector_list[0].irq = intr->irq;
 574                 netif_info(adapter, ifup, adapter->netdev,
 575                            "using legacy interrupts\n");
 576         }
 577
 578         /* At this point we must have at least one irq */
 579         lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
 580
 581         /* map all interrupts to vector 0 */
 582         lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
 583         lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
 584         lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
 585         flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 586                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 587                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 588                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 589
 590         if (intr->using_vectors) {
 591                 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 592                          LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 593         } else {
 594                 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
 595                          LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
 596                          LAN743X_VECTOR_FLAG_IRQ_SHARED;
 597         }
 598
 599         if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 600                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
 601                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
 602                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
 603                 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
 604                 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
 605                 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
 606         }
 607
 608         init_waitqueue_head(&intr->software_isr_wq);
 609
 610         ret = lan743x_intr_register_isr(adapter, 0, flags,
 611                                         INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
 612                                         INT_BIT_ALL_OTHER_,
 613                                         lan743x_intr_shared_isr, adapter);
 614         if (ret)
 615                 goto clean_up;
 616         intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
 617
 618         if (intr->using_vectors)
 619                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 620                                   INT_VEC_EN_(0));
 621
 622         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
 623                 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
 624                 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
 625                 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
 626                 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
 627                 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
 628                 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
 629                 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
 630                 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
 631                 if (adapter->is_pci11x1x) {
 632                         lan743x_csr_write(adapter, INT_MOD_CFG8, LAN743X_INT_MOD);
 633                         lan743x_csr_write(adapter, INT_MOD_CFG9, LAN743X_INT_MOD);
 634                         lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00007654);
 635                         lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00003210);
 636                 } else {
 637                         lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
 638                         lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
 639                 }
 640                 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
 641         }
 642
 643         /* enable interrupts */
 644         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
 645         ret = lan743x_intr_test_isr(adapter);
 646         if (ret)
 647                 goto clean_up;
 648
 649         if (intr->number_of_vectors > 1) {
 650                 int number_of_tx_vectors = intr->number_of_vectors - 1;
 651
 652                 if (number_of_tx_vectors > used_tx_channels)
 653                         number_of_tx_vectors = used_tx_channels;
 654                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 655                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 656                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 657                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 658                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 659                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 660
 661                 if (adapter->csr.flags &
 662                    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 663                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 664                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 665                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 666                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 667                 }
 668
 669                 for (index = 0; index < number_of_tx_vectors; index++) {
 670                         u32 int_bit = INT_BIT_DMA_TX_(index);
 671                         int vector = index + 1;
 672
 673                         /* map TX interrupt to vector */
 674                         int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
 675                         lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
 676
 677                         /* Remove TX interrupt from shared mask */
 678                         intr->vector_list[0].int_mask &= ~int_bit;
 679                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 680                                                         int_bit, lan743x_tx_isr,
 681                                                         &adapter->tx[index]);
 682                         if (ret)
 683                                 goto clean_up;
 684                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 685                         if (!(flags &
 686                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
 687                                 lan743x_csr_write(adapter, INT_VEC_EN_SET,
 688                                                   INT_VEC_EN_(vector));
 689                 }
 690         }
 691         if ((intr->number_of_vectors - used_tx_channels) > 1) {
 692                 int number_of_rx_vectors = intr->number_of_vectors -
 693                                                 used_tx_channels - 1;
 694
 695                 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
 696                         number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
 697
 698                 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
 699                         LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
 700                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
 701                         LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
 702                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
 703                         LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
 704
 705                 if (adapter->csr.flags &
 706                     LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
 707                         flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
 708                                 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
 709                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
 710                                 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
 711                                 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
 712                 }
 713                 for (index = 0; index < number_of_rx_vectors; index++) {
 714                         int vector = index + 1 + used_tx_channels;
 715                         u32 int_bit = INT_BIT_DMA_RX_(index);
 716
 717                         /* map RX interrupt to vector */
 718                         int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
 719                         lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
 720                         if (flags &
 721                             LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
 722                                 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
 723                                 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
 724                                                   int_vec_en_auto_clr);
 725                         }
 726
 727                         /* Remove RX interrupt from shared mask */
 728                         intr->vector_list[0].int_mask &= ~int_bit;
 729                         ret = lan743x_intr_register_isr(adapter, vector, flags,
 730                                                         int_bit, lan743x_rx_isr,
 731                                                         &adapter->rx[index]);
 732                         if (ret)
 733                                 goto clean_up;
 734                         intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
 735
 736                         lan743x_csr_write(adapter, INT_VEC_EN_SET,
 737                                           INT_VEC_EN_(vector));
 738                 }
 739         }
 740         return 0;
 741
 742 clean_up:
 743         lan743x_intr_close(adapter);
 744         return ret;
 745 }
 746
 747 static int lan743x_dp_write(struct lan743x_adapter *adapter,
 748                             u32 select, u32 addr, u32 length, u32 *buf)
 749 {
 750         u32 dp_sel;
 751         int i;
 752
 753         if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL, DP_SEL_DPRDY_,
 754                                             1, 40, 100, 100))
 755                 return -EIO;
 756         dp_sel = lan743x_csr_read(adapter, DP_SEL);
 757         dp_sel &= ~DP_SEL_MASK_;
 758         dp_sel |= select;
 759         lan743x_csr_write(adapter, DP_SEL, dp_sel);
 760
 761         for (i = 0; i < length; i++) {
 762                 lan743x_csr_write(adapter, DP_ADDR, addr + i);
 763                 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
 764                 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
 765                 if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL,
 766                                                     DP_SEL_DPRDY_,
 767                                                     1, 40, 100, 100))
 768                         return -EIO;
 769         }
 770
 771         return 0;
 772 }
 773
 774 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
 775 {
 776         u32 ret;
 777
 778         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 779                 MAC_MII_ACC_PHY_ADDR_MASK_;
 780         ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
 781                 MAC_MII_ACC_MIIRINDA_MASK_;
 782
 783         if (read)
 784                 ret |= MAC_MII_ACC_MII_READ_;
 785         else
 786                 ret |= MAC_MII_ACC_MII_WRITE_;
 787         ret |= MAC_MII_ACC_MII_BUSY_;
 788
 789         return ret;
 790 }
 791
 792 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
 793 {
 794         u32 data;
 795
 796         return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
 797                                   !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
 798 }
 799
 800 static int lan743x_mdiobus_read_c22(struct mii_bus *bus, int phy_id, int index)
 801 {
 802         struct lan743x_adapter *adapter = bus->priv;
 803         u32 val, mii_access;
 804         int ret;
 805
 806         /* comfirm MII not busy */
 807         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 808         if (ret < 0)
 809                 return ret;
 810
 811         /* set the address, index & direction (read from PHY) */
 812         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
 813         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 814         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 815         if (ret < 0)
 816                 return ret;
 817
 818         val = lan743x_csr_read(adapter, MAC_MII_DATA);
 819         return (int)(val & 0xFFFF);
 820 }
 821
 822 static int lan743x_mdiobus_write_c22(struct mii_bus *bus,
 823                                      int phy_id, int index, u16 regval)
 824 {
 825         struct lan743x_adapter *adapter = bus->priv;
 826         u32 val, mii_access;
 827         int ret;
 828
 829         /* confirm MII not busy */
 830         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 831         if (ret < 0)
 832                 return ret;
 833         val = (u32)regval;
 834         lan743x_csr_write(adapter, MAC_MII_DATA, val);
 835
 836         /* set the address, index & direction (write to PHY) */
 837         mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
 838         lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
 839         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 840         return ret;
 841 }
 842
 843 static u32 lan743x_mac_mmd_access(int id, int dev_addr, int op)
 844 {
 845         u32 ret;
 846
 847         ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
 848                 MAC_MII_ACC_PHY_ADDR_MASK_;
 849         ret |= (dev_addr << MAC_MII_ACC_MIIMMD_SHIFT_) &
 850                 MAC_MII_ACC_MIIMMD_MASK_;
 851         if (op == MMD_ACCESS_WRITE)
 852                 ret |= MAC_MII_ACC_MIICMD_WRITE_;
 853         else if (op == MMD_ACCESS_READ)
 854                 ret |= MAC_MII_ACC_MIICMD_READ_;
 855         else if (op == MMD_ACCESS_READ_INC)
 856                 ret |= MAC_MII_ACC_MIICMD_READ_INC_;
 857         else
 858                 ret |= MAC_MII_ACC_MIICMD_ADDR_;
 859         ret |= (MAC_MII_ACC_MII_BUSY_ | MAC_MII_ACC_MIICL45_);
 860
 861         return ret;
 862 }
 863
 864 static int lan743x_mdiobus_read_c45(struct mii_bus *bus, int phy_id,
 865                                     int dev_addr, int index)
 866 {
 867         struct lan743x_adapter *adapter = bus->priv;
 868         u32 mmd_access;
 869         int ret;
 870
 871         /* comfirm MII not busy */
 872         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 873         if (ret < 0)
 874                 return ret;
 875
 876         /* Load Register Address */
 877         lan743x_csr_write(adapter, MAC_MII_DATA, index);
 878         mmd_access = lan743x_mac_mmd_access(phy_id, dev_addr,
 879                                             MMD_ACCESS_ADDRESS);
 880         lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 881         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 882         if (ret < 0)
 883                 return ret;
 884
 885         /* Read Data */
 886         mmd_access = lan743x_mac_mmd_access(phy_id, dev_addr,
 887                                             MMD_ACCESS_READ);
 888         lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 889         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 890         if (ret < 0)
 891                 return ret;
 892
 893         ret = lan743x_csr_read(adapter, MAC_MII_DATA);
 894         return (int)(ret & 0xFFFF);
 895 }
 896
 897 static int lan743x_mdiobus_write_c45(struct mii_bus *bus, int phy_id,
 898                                      int dev_addr, int index, u16 regval)
 899 {
 900         struct lan743x_adapter *adapter = bus->priv;
 901         u32 mmd_access;
 902         int ret;
 903
 904         /* confirm MII not busy */
 905         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 906         if (ret < 0)
 907                 return ret;
 908
 909         /* Load Register Address */
 910         lan743x_csr_write(adapter, MAC_MII_DATA, (u32)index);
 911         mmd_access = lan743x_mac_mmd_access(phy_id, dev_addr,
 912                                             MMD_ACCESS_ADDRESS);
 913         lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 914         ret = lan743x_mac_mii_wait_till_not_busy(adapter);
 915         if (ret < 0)
 916                 return ret;
 917
 918         /* Write Data */
 919         lan743x_csr_write(adapter, MAC_MII_DATA, (u32)regval);
 920         mmd_access = lan743x_mac_mmd_access(phy_id, dev_addr,
 921                                             MMD_ACCESS_WRITE);
 922         lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
 923
 924         return lan743x_mac_mii_wait_till_not_busy(adapter);
 925 }
 926
 927 static int lan743x_sgmii_wait_till_not_busy(struct lan743x_adapter *adapter)
 928 {
 929         u32 data;
 930         int ret;
 931
 932         ret = readx_poll_timeout(LAN743X_CSR_READ_OP, SGMII_ACC, data,
 933                                  !(data & SGMII_ACC_SGMII_BZY_), 100, 1000000);
 934         if (ret < 0)
 935                 netif_err(adapter, drv, adapter->netdev,
 936                           "%s: error %d sgmii wait timeout\n", __func__, ret);
 937
 938         return ret;
 939 }
 940
 941 int lan743x_sgmii_read(struct lan743x_adapter *adapter, u8 mmd, u16 addr)
 942 {
 943         u32 mmd_access;
 944         int ret;
 945         u32 val;
 946
 947         if (mmd > 31) {
 948                 netif_err(adapter, probe, adapter->netdev,
 949                           "%s mmd should <= 31\n", __func__);
 950                 return -EINVAL;
 951         }
 952
 953         mutex_lock(&adapter->sgmii_rw_lock);
 954         /* Load Register Address */
 955         mmd_access = mmd << SGMII_ACC_SGMII_MMD_SHIFT_;
 956         mmd_access |= (addr | SGMII_ACC_SGMII_BZY_);
 957         lan743x_csr_write(adapter, SGMII_ACC, mmd_access);
 958         ret = lan743x_sgmii_wait_till_not_busy(adapter);
 959         if (ret < 0)
 960                 goto sgmii_unlock;
 961
 962         val = lan743x_csr_read(adapter, SGMII_DATA);
 963         ret = (int)(val & SGMII_DATA_MASK_);
 964
 965 sgmii_unlock:
 966         mutex_unlock(&adapter->sgmii_rw_lock);
 967
 968         return ret;
 969 }
 970
 971 static int lan743x_sgmii_write(struct lan743x_adapter *adapter,
 972                                u8 mmd, u16 addr, u16 val)
 973 {
 974         u32 mmd_access;
 975         int ret;
 976
 977         if (mmd > 31) {
 978                 netif_err(adapter, probe, adapter->netdev,
 979                           "%s mmd should <= 31\n", __func__);
 980                 return -EINVAL;
 981         }
 982         mutex_lock(&adapter->sgmii_rw_lock);
 983         /* Load Register Data */
 984         lan743x_csr_write(adapter, SGMII_DATA, (u32)(val & SGMII_DATA_MASK_));
 985         /* Load Register Address */
 986         mmd_access = mmd << SGMII_ACC_SGMII_MMD_SHIFT_;
 987         mmd_access |= (addr | SGMII_ACC_SGMII_BZY_ | SGMII_ACC_SGMII_WR_);
 988         lan743x_csr_write(adapter, SGMII_ACC, mmd_access);
 989         ret = lan743x_sgmii_wait_till_not_busy(adapter);
 990         mutex_unlock(&adapter->sgmii_rw_lock);
 991
 992         return ret;
 993 }
 994
 995 static int lan743x_sgmii_mpll_set(struct lan743x_adapter *adapter,
 996                                   u16 baud)
 997 {
 998         int mpllctrl0;
 999         int mpllctrl1;
1000         int miscctrl1;
1001         int ret;
1002
1003         mpllctrl0 = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2,
1004                                        VR_MII_GEN2_4_MPLL_CTRL0);
1005         if (mpllctrl0 < 0)
1006                 return mpllctrl0;
1007
1008         mpllctrl0 &= ~VR_MII_MPLL_CTRL0_USE_REFCLK_PAD_;
1009         if (baud == VR_MII_BAUD_RATE_1P25GBPS) {
1010                 mpllctrl1 = VR_MII_MPLL_MULTIPLIER_100;
1011                 /* mpll_baud_clk/4 */
1012                 miscctrl1 = 0xA;
1013         } else {
1014                 mpllctrl1 = VR_MII_MPLL_MULTIPLIER_125;
1015                 /* mpll_baud_clk/2 */
1016                 miscctrl1 = 0x5;
1017         }
1018
1019         ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2,
1020                                   VR_MII_GEN2_4_MPLL_CTRL0, mpllctrl0);
1021         if (ret < 0)
1022                 return ret;
1023
1024         ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2,
1025                                   VR_MII_GEN2_4_MPLL_CTRL1, mpllctrl1);
1026         if (ret < 0)
1027                 return ret;
1028
1029         return lan743x_sgmii_write(adapter, MDIO_MMD_VEND2,
1030                                   VR_MII_GEN2_4_MISC_CTRL1, miscctrl1);
1031 }
1032
1033 static int lan743x_sgmii_2_5G_mode_set(struct lan743x_adapter *adapter,
1034                                        bool enable)
1035 {
1036         if (enable)
1037                 return lan743x_sgmii_mpll_set(adapter,
1038                                               VR_MII_BAUD_RATE_3P125GBPS);
1039         else
1040                 return lan743x_sgmii_mpll_set(adapter,
1041                                               VR_MII_BAUD_RATE_1P25GBPS);
1042 }
1043
1044 static int lan743x_is_sgmii_2_5G_mode(struct lan743x_adapter *adapter,
1045                                       bool *status)
1046 {
1047         int ret;
1048
1049         ret = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2,
1050                                  VR_MII_GEN2_4_MPLL_CTRL1);
1051         if (ret < 0)
1052                 return ret;
1053
1054         if (ret == VR_MII_MPLL_MULTIPLIER_125 ||
1055             ret == VR_MII_MPLL_MULTIPLIER_50)
1056                 *status = true;
1057         else
1058                 *status = false;
1059
1060         return 0;
1061 }
1062
1063 static int lan743x_sgmii_aneg_update(struct lan743x_adapter *adapter)
1064 {
1065         enum lan743x_sgmii_lsd lsd = adapter->sgmii_lsd;
1066         int mii_ctrl;
1067         int dgt_ctrl;
1068         int an_ctrl;
1069         int ret;
1070
1071         if (lsd == LINK_2500_MASTER || lsd == LINK_2500_SLAVE)
1072                 /* Switch to 2.5 Gbps */
1073                 ret = lan743x_sgmii_2_5G_mode_set(adapter, true);
1074         else
1075                 /* Switch to 10/100/1000 Mbps clock */
1076                 ret = lan743x_sgmii_2_5G_mode_set(adapter, false);
1077         if (ret < 0)
1078                 return ret;
1079
1080         /* Enable SGMII Auto NEG */
1081         mii_ctrl = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2, MII_BMCR);
1082         if (mii_ctrl < 0)
1083                 return mii_ctrl;
1084
1085         an_ctrl = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2, VR_MII_AN_CTRL);
1086         if (an_ctrl < 0)
1087                 return an_ctrl;
1088
1089         dgt_ctrl = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2,
1090                                       VR_MII_DIG_CTRL1);
1091         if (dgt_ctrl < 0)
1092                 return dgt_ctrl;
1093
1094         if (lsd == LINK_2500_MASTER || lsd == LINK_2500_SLAVE) {
1095                 mii_ctrl &= ~(BMCR_ANENABLE | BMCR_ANRESTART | BMCR_SPEED100);
1096                 mii_ctrl |= BMCR_SPEED1000;
1097                 dgt_ctrl |= VR_MII_DIG_CTRL1_CL37_TMR_OVR_RIDE_;
1098                 dgt_ctrl &= ~VR_MII_DIG_CTRL1_MAC_AUTO_SW_;
1099                 /* In order for Auto-Negotiation to operate properly at
1100                  * 2.5 Gbps the 1.6ms link timer values must be adjusted
1101                  * The VR_MII_LINK_TIMER_CTRL Register must be set to
1102                  * 16'h7A1 and The CL37_TMR_OVR_RIDE bit of the
1103                  * VR_MII_DIG_CTRL1 Register set to 1
1104                  */
1105                 ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2,
1106                                           VR_MII_LINK_TIMER_CTRL, 0x7A1);
1107                 if (ret < 0)
1108                         return ret;
1109         } else {
1110                 mii_ctrl |= (BMCR_ANENABLE | BMCR_ANRESTART);
1111                 an_ctrl &= ~VR_MII_AN_CTRL_SGMII_LINK_STS_;
1112                 dgt_ctrl &= ~VR_MII_DIG_CTRL1_CL37_TMR_OVR_RIDE_;
1113                 dgt_ctrl |= VR_MII_DIG_CTRL1_MAC_AUTO_SW_;
1114         }
1115
1116         ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR,
1117                                   mii_ctrl);
1118         if (ret < 0)
1119                 return ret;
1120
1121         ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2,
1122                                   VR_MII_DIG_CTRL1, dgt_ctrl);
1123         if (ret < 0)
1124                 return ret;
1125
1126         return lan743x_sgmii_write(adapter, MDIO_MMD_VEND2,
1127                                   VR_MII_AN_CTRL, an_ctrl);
1128 }
1129
1130 static int lan743x_pcs_seq_state(struct lan743x_adapter *adapter, u8 state)
1131 {
1132         u8 wait_cnt = 0;
1133         u32 dig_sts;
1134
1135         do {
1136                 dig_sts = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2,
1137                                              VR_MII_DIG_STS);
1138                 if (((dig_sts & VR_MII_DIG_STS_PSEQ_STATE_MASK_) >>
1139                       VR_MII_DIG_STS_PSEQ_STATE_POS_) == state)
1140                         break;
1141                 usleep_range(1000, 2000);
1142         } while (wait_cnt++ < 10);
1143
1144         if (wait_cnt >= 10)
1145                 return -ETIMEDOUT;
1146
1147         return 0;
1148 }
1149
1150 static int lan743x_sgmii_config(struct lan743x_adapter *adapter)
1151 {
1152         struct net_device *netdev = adapter->netdev;
1153         struct phy_device *phydev = netdev->phydev;
1154         enum lan743x_sgmii_lsd lsd = POWER_DOWN;
1155         int mii_ctl;
1156         bool status;
1157         int ret;
1158
1159         switch (phydev->speed) {
1160         case SPEED_2500:
1161                 if (phydev->master_slave_state == MASTER_SLAVE_STATE_MASTER)
1162                         lsd = LINK_2500_MASTER;
1163                 else
1164                         lsd = LINK_2500_SLAVE;
1165                 break;
1166         case SPEED_1000:
1167                 if (phydev->master_slave_state == MASTER_SLAVE_STATE_MASTER)
1168                         lsd = LINK_1000_MASTER;
1169                 else
1170                         lsd = LINK_1000_SLAVE;
1171                 break;
1172         case SPEED_100:
1173                 if (phydev->duplex)
1174                         lsd = LINK_100FD;
1175                 else
1176                         lsd = LINK_100HD;
1177                 break;
1178         case SPEED_10:
1179                 if (phydev->duplex)
1180                         lsd = LINK_10FD;
1181                 else
1182                         lsd = LINK_10HD;
1183                 break;
1184         default:
1185                 netif_err(adapter, drv, adapter->netdev,
1186                           "Invalid speed %d\n", phydev->speed);
1187                 return -EINVAL;
1188         }
1189
1190         adapter->sgmii_lsd = lsd;
1191         ret = lan743x_sgmii_aneg_update(adapter);
1192         if (ret < 0) {
1193                 netif_err(adapter, drv, adapter->netdev,
1194                           "error %d SGMII cfg failed\n", ret);
1195                 return ret;
1196         }
1197
1198         ret = lan743x_is_sgmii_2_5G_mode(adapter, &status);
1199         if (ret < 0) {
1200                 netif_err(adapter, drv, adapter->netdev,
1201                           "error %d SGMII get mode failed\n", ret);
1202                 return ret;
1203         }
1204
1205         if (status)
1206                 netif_dbg(adapter, drv, adapter->netdev,
1207                           "SGMII 2.5G mode enable\n");
1208         else
1209                 netif_dbg(adapter, drv, adapter->netdev,
1210                           "SGMII 1G mode enable\n");
1211
1212         /* SGMII/1000/2500BASE-X PCS power down */
1213         mii_ctl = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2, MII_BMCR);
1214         if (mii_ctl < 0)
1215                 return mii_ctl;
1216
1217         mii_ctl |= BMCR_PDOWN;
1218         ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR, mii_ctl);
1219         if (ret < 0)
1220                 return ret;
1221
1222         ret = lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_DOWN);
1223         if (ret < 0)
1224                 return ret;
1225
1226         /* SGMII/1000/2500BASE-X PCS power up */
1227         mii_ctl &= ~BMCR_PDOWN;
1228         ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR, mii_ctl);
1229         if (ret < 0)
1230                 return ret;
1231
1232         ret = lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_UP);
1233         if (ret < 0)
1234                 return ret;
1235
1236         return 0;
1237 }
1238
1239 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
1240                                     u8 *addr)
1241 {
1242         u32 addr_lo, addr_hi;
1243
1244         addr_lo = addr[0] |
1245                 addr[1] << 8 |
1246                 addr[2] << 16 |
1247                 addr[3] << 24;
1248         addr_hi = addr[4] |
1249                 addr[5] << 8;
1250         lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
1251         lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
1252
1253         ether_addr_copy(adapter->mac_address, addr);
1254         netif_info(adapter, drv, adapter->netdev,
1255                    "MAC address set to %pM\n", addr);
1256 }
1257
1258 static int lan743x_mac_init(struct lan743x_adapter *adapter)
1259 {
1260         bool mac_address_valid = true;
1261         struct net_device *netdev;
1262         u32 mac_addr_hi = 0;
1263         u32 mac_addr_lo = 0;
1264         u32 data;
1265
1266         netdev = adapter->netdev;
1267
1268         /* disable auto duplex, and speed detection. Phylib does that */
1269         data = lan743x_csr_read(adapter, MAC_CR);
1270         data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
1271         data |= MAC_CR_CNTR_RST_;
1272         lan743x_csr_write(adapter, MAC_CR, data);
1273
1274         if (!is_valid_ether_addr(adapter->mac_address)) {
1275                 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
1276                 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
1277                 adapter->mac_address[0] = mac_addr_lo & 0xFF;
1278                 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
1279                 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
1280                 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
1281                 adapter->mac_address[4] = mac_addr_hi & 0xFF;
1282                 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
1283
1284                 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
1285                     mac_addr_lo == 0xFFFFFFFF) {
1286                         mac_address_valid = false;
1287                 } else if (!is_valid_ether_addr(adapter->mac_address)) {
1288                         mac_address_valid = false;
1289                 }
1290
1291                 if (!mac_address_valid)
1292                         eth_random_addr(adapter->mac_address);
1293         }
1294         lan743x_mac_set_address(adapter, adapter->mac_address);
1295         eth_hw_addr_set(netdev, adapter->mac_address);
1296
1297         return 0;
1298 }
1299
1300 static int lan743x_mac_open(struct lan743x_adapter *adapter)
1301 {
1302         u32 temp;
1303
1304         temp = lan743x_csr_read(adapter, MAC_RX);
1305         lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
1306         temp = lan743x_csr_read(adapter, MAC_TX);
1307         lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
1308         return 0;
1309 }
1310
1311 static void lan743x_mac_close(struct lan743x_adapter *adapter)
1312 {
1313         u32 temp;
1314
1315         temp = lan743x_csr_read(adapter, MAC_TX);
1316         temp &= ~MAC_TX_TXEN_;
1317         lan743x_csr_write(adapter, MAC_TX, temp);
1318         lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
1319                                  1, 1000, 20000, 100);
1320
1321         temp = lan743x_csr_read(adapter, MAC_RX);
1322         temp &= ~MAC_RX_RXEN_;
1323         lan743x_csr_write(adapter, MAC_RX, temp);
1324         lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
1325                                  1, 1000, 20000, 100);
1326 }
1327
1328 void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
1329                                        bool tx_enable, bool rx_enable)
1330 {
1331         u32 flow_setting = 0;
1332
1333         /* set maximum pause time because when fifo space frees
1334          * up a zero value pause frame will be sent to release the pause
1335          */
1336         flow_setting = MAC_FLOW_CR_FCPT_MASK_;
1337         if (tx_enable)
1338                 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
1339         if (rx_enable)
1340                 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
1341         lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
1342 }
1343
1344 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
1345 {
1346         int enabled = 0;
1347         u32 mac_rx = 0;
1348
1349         mac_rx = lan743x_csr_read(adapter, MAC_RX);
1350         if (mac_rx & MAC_RX_RXEN_) {
1351                 enabled = 1;
1352                 if (mac_rx & MAC_RX_RXD_) {
1353                         lan743x_csr_write(adapter, MAC_RX, mac_rx);
1354                         mac_rx &= ~MAC_RX_RXD_;
1355                 }
1356                 mac_rx &= ~MAC_RX_RXEN_;
1357                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1358                 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
1359                                          1, 1000, 20000, 100);
1360                 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
1361         }
1362
1363         mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
1364         mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN)
1365                   << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
1366         lan743x_csr_write(adapter, MAC_RX, mac_rx);
1367
1368         if (enabled) {
1369                 mac_rx |= MAC_RX_RXEN_;
1370                 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1371         }
1372         return 0;
1373 }
1374
1375 /* PHY */
1376 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
1377 {
1378         u32 data;
1379
1380         /* Only called with in probe, and before mdiobus_register */
1381
1382         data = lan743x_csr_read(adapter, PMT_CTL);
1383         data |= PMT_CTL_ETH_PHY_RST_;
1384         lan743x_csr_write(adapter, PMT_CTL, data);
1385
1386         return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
1387                                   (!(data & PMT_CTL_ETH_PHY_RST_) &&
1388                                   (data & PMT_CTL_READY_)),
1389                                   50000, 1000000);
1390 }
1391
1392 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
1393                                            u16 local_adv, u16 remote_adv)
1394 {
1395         struct lan743x_phy *phy = &adapter->phy;
1396         u8 cap;
1397
1398         if (phy->fc_autoneg)
1399                 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
1400         else
1401                 cap = phy->fc_request_control;
1402
1403         lan743x_mac_flow_ctrl_set_enables(adapter,
1404                                           cap & FLOW_CTRL_TX,
1405                                           cap & FLOW_CTRL_RX);
1406 }
1407
1408 static int lan743x_phy_init(struct lan743x_adapter *adapter)
1409 {
1410         return lan743x_phy_reset(adapter);
1411 }
1412
1413 static void lan743x_phy_link_status_change(struct net_device *netdev)
1414 {
1415         struct lan743x_adapter *adapter = netdev_priv(netdev);
1416         struct phy_device *phydev = netdev->phydev;
1417         u32 data;
1418
1419         phy_print_status(phydev);
1420         if (phydev->state == PHY_RUNNING) {
1421                 int remote_advertisement = 0;
1422                 int local_advertisement = 0;
1423
1424                 data = lan743x_csr_read(adapter, MAC_CR);
1425
1426                 /* set duplex mode */
1427                 if (phydev->duplex)
1428                         data |= MAC_CR_DPX_;
1429                 else
1430                         data &= ~MAC_CR_DPX_;
1431
1432                 /* set bus speed */
1433                 switch (phydev->speed) {
1434                 case SPEED_10:
1435                         data &= ~MAC_CR_CFG_H_;
1436                         data &= ~MAC_CR_CFG_L_;
1437                 break;
1438                 case SPEED_100:
1439                         data &= ~MAC_CR_CFG_H_;
1440                         data |= MAC_CR_CFG_L_;
1441                 break;
1442                 case SPEED_1000:
1443                         data |= MAC_CR_CFG_H_;
1444                         data &= ~MAC_CR_CFG_L_;
1445                 break;
1446                 case SPEED_2500:
1447                         data |= MAC_CR_CFG_H_;
1448                         data |= MAC_CR_CFG_L_;
1449                 break;
1450                 }
1451                 lan743x_csr_write(adapter, MAC_CR, data);
1452
1453                 local_advertisement =
1454                         linkmode_adv_to_mii_adv_t(phydev->advertising);
1455                 remote_advertisement =
1456                         linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
1457
1458                 lan743x_phy_update_flowcontrol(adapter, local_advertisement,
1459                                                remote_advertisement);
1460                 lan743x_ptp_update_latency(adapter, phydev->speed);
1461                 if (phydev->interface == PHY_INTERFACE_MODE_SGMII ||
1462                     phydev->interface == PHY_INTERFACE_MODE_1000BASEX ||
1463                     phydev->interface == PHY_INTERFACE_MODE_2500BASEX)
1464                         lan743x_sgmii_config(adapter);
1465         }
1466 }
1467
1468 static void lan743x_phy_close(struct lan743x_adapter *adapter)
1469 {
1470         struct net_device *netdev = adapter->netdev;
1471         struct phy_device *phydev = netdev->phydev;
1472
1473         phy_stop(netdev->phydev);
1474         phy_disconnect(netdev->phydev);
1475
1476         /* using phydev here as phy_disconnect NULLs netdev->phydev */
1477         if (phy_is_pseudo_fixed_link(phydev))
1478                 fixed_phy_unregister(phydev);
1479
1480 }
1481
1482 static void lan743x_phy_interface_select(struct lan743x_adapter *adapter)
1483 {
1484         u32 id_rev;
1485         u32 data;
1486
1487         data = lan743x_csr_read(adapter, MAC_CR);
1488         id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
1489
1490         if (adapter->is_pci11x1x && adapter->is_sgmii_en)
1491                 adapter->phy_interface = PHY_INTERFACE_MODE_SGMII;
1492         else if (id_rev == ID_REV_ID_LAN7430_)
1493                 adapter->phy_interface = PHY_INTERFACE_MODE_GMII;
1494         else if ((id_rev == ID_REV_ID_LAN7431_) && (data & MAC_CR_MII_EN_))
1495                 adapter->phy_interface = PHY_INTERFACE_MODE_MII;
1496         else
1497                 adapter->phy_interface = PHY_INTERFACE_MODE_RGMII;
1498 }
1499
1500 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1501 {
1502         struct net_device *netdev = adapter->netdev;
1503         struct lan743x_phy *phy = &adapter->phy;
1504         struct fixed_phy_status fphy_status = {
1505                 .link = 1,
1506                 .speed = SPEED_1000,
1507                 .duplex = DUPLEX_FULL,
1508         };
1509         struct phy_device *phydev;
1510         int ret = -EIO;
1511
1512         /* try devicetree phy, or fixed link */
1513         phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1514                                         lan743x_phy_link_status_change);
1515
1516         if (!phydev) {
1517                 /* try internal phy */
1518                 phydev = phy_find_first(adapter->mdiobus);
1519                 if (!phydev)    {
1520                         if ((adapter->csr.id_rev & ID_REV_ID_MASK_) ==
1521                                         ID_REV_ID_LAN7431_) {
1522                                 phydev = fixed_phy_register(PHY_POLL,
1523                                                             &fphy_status, NULL);
1524                                 if (IS_ERR(phydev)) {
1525                                         netdev_err(netdev, "No PHY/fixed_PHY found\n");
1526                                         return PTR_ERR(phydev);
1527                                 }
1528                         } else {
1529                                 goto return_error;
1530                                 }
1531                 }
1532
1533                 lan743x_phy_interface_select(adapter);
1534
1535                 ret = phy_connect_direct(netdev, phydev,
1536                                          lan743x_phy_link_status_change,
1537                                          adapter->phy_interface);
1538                 if (ret)
1539                         goto return_error;
1540         }
1541
1542         /* MAC doesn't support 1000T Half */
1543         phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1544
1545         /* support both flow controls */
1546         phy_support_asym_pause(phydev);
1547         phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1548         phy->fc_autoneg = phydev->autoneg;
1549
1550         phy_start(phydev);
1551         phy_start_aneg(phydev);
1552         phy_attached_info(phydev);
1553         return 0;
1554
1555 return_error:
1556         return ret;
1557 }
1558
1559 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1560 {
1561         lan743x_csr_write(adapter, RFE_RSS_CFG,
1562                 RFE_RSS_CFG_UDP_IPV6_EX_ |
1563                 RFE_RSS_CFG_TCP_IPV6_EX_ |
1564                 RFE_RSS_CFG_IPV6_EX_ |
1565                 RFE_RSS_CFG_UDP_IPV6_ |
1566                 RFE_RSS_CFG_TCP_IPV6_ |
1567                 RFE_RSS_CFG_IPV6_ |
1568                 RFE_RSS_CFG_UDP_IPV4_ |
1569                 RFE_RSS_CFG_TCP_IPV4_ |
1570                 RFE_RSS_CFG_IPV4_ |
1571                 RFE_RSS_CFG_VALID_HASH_BITS_ |
1572                 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1573                 RFE_RSS_CFG_RSS_HASH_STORE_ |
1574                 RFE_RSS_CFG_RSS_ENABLE_);
1575 }
1576
1577 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1578 {
1579         u8 *mac_addr;
1580         u32 mac_addr_hi = 0;
1581         u32 mac_addr_lo = 0;
1582
1583         /* Add mac address to perfect Filter */
1584         mac_addr = adapter->mac_address;
1585         mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1586                       (((u32)(mac_addr[1])) << 8) |
1587                       (((u32)(mac_addr[2])) << 16) |
1588                       (((u32)(mac_addr[3])) << 24));
1589         mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1590                       (((u32)(mac_addr[5])) << 8));
1591
1592         lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1593         lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1594                           mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1595 }
1596
1597 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1598 {
1599         struct net_device *netdev = adapter->netdev;
1600         u32 hash_table[DP_SEL_VHF_HASH_LEN];
1601         u32 rfctl;
1602         u32 data;
1603
1604         rfctl = lan743x_csr_read(adapter, RFE_CTL);
1605         rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1606                  RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1607         rfctl |= RFE_CTL_AB_;
1608         if (netdev->flags & IFF_PROMISC) {
1609                 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1610         } else {
1611                 if (netdev->flags & IFF_ALLMULTI)
1612                         rfctl |= RFE_CTL_AM_;
1613         }
1614
1615         if (netdev->features & NETIF_F_RXCSUM)
1616                 rfctl |= RFE_CTL_IP_COE_ | RFE_CTL_TCP_UDP_COE_;
1617
1618         memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1619         if (netdev_mc_count(netdev)) {
1620                 struct netdev_hw_addr *ha;
1621                 int i;
1622
1623                 rfctl |= RFE_CTL_DA_PERFECT_;
1624                 i = 1;
1625                 netdev_for_each_mc_addr(ha, netdev) {
1626                         /* set first 32 into Perfect Filter */
1627                         if (i < 33) {
1628                                 lan743x_csr_write(adapter,
1629                                                   RFE_ADDR_FILT_HI(i), 0);
1630                                 data = ha->addr[3];
1631                                 data = ha->addr[2] | (data << 8);
1632                                 data = ha->addr[1] | (data << 8);
1633                                 data = ha->addr[0] | (data << 8);
1634                                 lan743x_csr_write(adapter,
1635                                                   RFE_ADDR_FILT_LO(i), data);
1636                                 data = ha->addr[5];
1637                                 data = ha->addr[4] | (data << 8);
1638                                 data |= RFE_ADDR_FILT_HI_VALID_;
1639                                 lan743x_csr_write(adapter,
1640                                                   RFE_ADDR_FILT_HI(i), data);
1641                         } else {
1642                                 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1643                                              23) & 0x1FF;
1644                                 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1645                                 rfctl |= RFE_CTL_MCAST_HASH_;
1646                         }
1647                         i++;
1648                 }
1649         }
1650
1651         lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1652                          DP_SEL_VHF_VLAN_LEN,
1653                          DP_SEL_VHF_HASH_LEN, hash_table);
1654         lan743x_csr_write(adapter, RFE_CTL, rfctl);
1655 }
1656
1657 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1658 {
1659         u32 data = 0;
1660
1661         lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1662         lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1663                                  0, 1000, 20000, 100);
1664         switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1665         case DMA_DESCRIPTOR_SPACING_16:
1666                 data = DMAC_CFG_MAX_DSPACE_16_;
1667                 break;
1668         case DMA_DESCRIPTOR_SPACING_32:
1669                 data = DMAC_CFG_MAX_DSPACE_32_;
1670                 break;
1671         case DMA_DESCRIPTOR_SPACING_64:
1672                 data = DMAC_CFG_MAX_DSPACE_64_;
1673                 break;
1674         case DMA_DESCRIPTOR_SPACING_128:
1675                 data = DMAC_CFG_MAX_DSPACE_128_;
1676                 break;
1677         default:
1678                 return -EPERM;
1679         }
1680         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1681                 data |= DMAC_CFG_COAL_EN_;
1682         data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1683         data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1684         lan743x_csr_write(adapter, DMAC_CFG, data);
1685         data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1686         data |= DMAC_COAL_CFG_TIMER_TX_START_;
1687         data |= DMAC_COAL_CFG_FLUSH_INTS_;
1688         data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1689         data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1690         data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1691         data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1692         lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1693         data = DMAC_OBFF_TX_THRES_SET_(0x08);
1694         data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1695         lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1696         return 0;
1697 }
1698
1699 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1700                                      int tx_channel)
1701 {
1702         u32 dmac_cmd = 0;
1703
1704         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1705         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1706                                       DMAC_CMD_START_T_(tx_channel)),
1707                                       (dmac_cmd &
1708                                       DMAC_CMD_STOP_T_(tx_channel)));
1709 }
1710
1711 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1712                                              int tx_channel)
1713 {
1714         int timeout = 100;
1715         int result = 0;
1716
1717         while (timeout &&
1718                ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1719                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1720                 usleep_range(1000, 20000);
1721                 timeout--;
1722         }
1723         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1724                 result = -ENODEV;
1725         return result;
1726 }
1727
1728 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1729                                      int rx_channel)
1730 {
1731         u32 dmac_cmd = 0;
1732
1733         dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1734         return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1735                                       DMAC_CMD_START_R_(rx_channel)),
1736                                       (dmac_cmd &
1737                                       DMAC_CMD_STOP_R_(rx_channel)));
1738 }
1739
1740 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1741                                              int rx_channel)
1742 {
1743         int timeout = 100;
1744         int result = 0;
1745
1746         while (timeout &&
1747                ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1748                DMAC_CHANNEL_STATE_STOP_PENDING)) {
1749                 usleep_range(1000, 20000);
1750                 timeout--;
1751         }
1752         if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1753                 result = -ENODEV;
1754         return result;
1755 }
1756
1757 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1758                                     int descriptor_index, bool cleanup)
1759 {
1760         struct lan743x_tx_buffer_info *buffer_info = NULL;
1761         struct lan743x_tx_descriptor *descriptor = NULL;
1762         u32 descriptor_type = 0;
1763         bool ignore_sync;
1764
1765         descriptor = &tx->ring_cpu_ptr[descriptor_index];
1766         buffer_info = &tx->buffer_info[descriptor_index];
1767         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1768                 goto done;
1769
1770         descriptor_type = le32_to_cpu(descriptor->data0) &
1771                           TX_DESC_DATA0_DTYPE_MASK_;
1772         if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1773                 goto clean_up_data_descriptor;
1774         else
1775                 goto clear_active;
1776
1777 clean_up_data_descriptor:
1778         if (buffer_info->dma_ptr) {
1779                 if (buffer_info->flags &
1780                     TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1781                         dma_unmap_page(&tx->adapter->pdev->dev,
1782                                        buffer_info->dma_ptr,
1783                                        buffer_info->buffer_length,
1784                                        DMA_TO_DEVICE);
1785                 } else {
1786                         dma_unmap_single(&tx->adapter->pdev->dev,
1787                                          buffer_info->dma_ptr,
1788                                          buffer_info->buffer_length,
1789                                          DMA_TO_DEVICE);
1790                 }
1791                 buffer_info->dma_ptr = 0;
1792                 buffer_info->buffer_length = 0;
1793         }
1794         if (!buffer_info->skb)
1795                 goto clear_active;
1796
1797         if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1798                 dev_kfree_skb_any(buffer_info->skb);
1799                 goto clear_skb;
1800         }
1801
1802         if (cleanup) {
1803                 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1804                 dev_kfree_skb_any(buffer_info->skb);
1805         } else {
1806                 ignore_sync = (buffer_info->flags &
1807                                TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1808                 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1809                                              buffer_info->skb, ignore_sync);
1810         }
1811
1812 clear_skb:
1813         buffer_info->skb = NULL;
1814
1815 clear_active:
1816         buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1817
1818 done:
1819         memset(buffer_info, 0, sizeof(*buffer_info));
1820         memset(descriptor, 0, sizeof(*descriptor));
1821 }
1822
1823 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1824 {
1825         return ((++index) % tx->ring_size);
1826 }
1827
1828 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1829 {
1830         while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1831                 lan743x_tx_release_desc(tx, tx->last_head, false);
1832                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1833         }
1834 }
1835
1836 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1837 {
1838         u32 original_head = 0;
1839
1840         original_head = tx->last_head;
1841         do {
1842                 lan743x_tx_release_desc(tx, tx->last_head, true);
1843                 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1844         } while (tx->last_head != original_head);
1845         memset(tx->ring_cpu_ptr, 0,
1846                sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1847         memset(tx->buffer_info, 0,
1848                sizeof(*tx->buffer_info) * (tx->ring_size));
1849 }
1850
1851 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1852                                    struct sk_buff *skb)
1853 {
1854         int result = 1; /* 1 for the main skb buffer */
1855         int nr_frags = 0;
1856
1857         if (skb_is_gso(skb))
1858                 result++; /* requires an extension descriptor */
1859         nr_frags = skb_shinfo(skb)->nr_frags;
1860         result += nr_frags; /* 1 for each fragment buffer */
1861         return result;
1862 }
1863
1864 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1865 {
1866         int last_head = tx->last_head;
1867         int last_tail = tx->last_tail;
1868
1869         if (last_tail >= last_head)
1870                 return tx->ring_size - last_tail + last_head - 1;
1871         else
1872                 return last_head - last_tail - 1;
1873 }
1874
1875 static void lan743x_rx_cfg_b_tstamp_config(struct lan743x_adapter *adapter,
1876                                            int rx_ts_config)
1877 {
1878         int channel_number;
1879         int index;
1880         u32 data;
1881
1882         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
1883                 channel_number = adapter->rx[index].channel_number;
1884                 data = lan743x_csr_read(adapter, RX_CFG_B(channel_number));
1885                 data &= RX_CFG_B_TS_MASK_;
1886                 data |= rx_ts_config;
1887                 lan743x_csr_write(adapter, RX_CFG_B(channel_number),
1888                                   data);
1889         }
1890 }
1891
1892 int lan743x_rx_set_tstamp_mode(struct lan743x_adapter *adapter,
1893                                int rx_filter)
1894 {
1895         u32 data;
1896
1897         switch (rx_filter) {
1898         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1899                         lan743x_rx_cfg_b_tstamp_config(adapter,
1900                                                        RX_CFG_B_TS_DESCR_EN_);
1901                         data = lan743x_csr_read(adapter, PTP_RX_TS_CFG);
1902                         data |= PTP_RX_TS_CFG_EVENT_MSGS_;
1903                         lan743x_csr_write(adapter, PTP_RX_TS_CFG, data);
1904                         break;
1905         case HWTSTAMP_FILTER_NONE:
1906                         lan743x_rx_cfg_b_tstamp_config(adapter,
1907                                                        RX_CFG_B_TS_NONE_);
1908                         break;
1909         case HWTSTAMP_FILTER_ALL:
1910                         lan743x_rx_cfg_b_tstamp_config(adapter,
1911                                                        RX_CFG_B_TS_ALL_RX_);
1912                         break;
1913         default:
1914                         return -ERANGE;
1915         }
1916         return 0;
1917 }
1918
1919 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1920                                       bool enable_timestamping,
1921                                       bool enable_onestep_sync)
1922 {
1923         if (enable_timestamping)
1924                 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1925         else
1926                 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1927         if (enable_onestep_sync)
1928                 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1929         else
1930                 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1931 }
1932
1933 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1934                                   unsigned char *first_buffer,
1935                                   unsigned int first_buffer_length,
1936                                   unsigned int frame_length,
1937                                   bool time_stamp,
1938                                   bool check_sum)
1939 {
1940         /* called only from within lan743x_tx_xmit_frame.
1941          * assuming tx->ring_lock has already been acquired.
1942          */
1943         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1944         struct lan743x_tx_buffer_info *buffer_info = NULL;
1945         struct lan743x_adapter *adapter = tx->adapter;
1946         struct device *dev = &adapter->pdev->dev;
1947         dma_addr_t dma_ptr;
1948
1949         tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1950         tx->frame_first = tx->last_tail;
1951         tx->frame_tail = tx->frame_first;
1952
1953         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1954         buffer_info = &tx->buffer_info[tx->frame_tail];
1955         dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1956                                  DMA_TO_DEVICE);
1957         if (dma_mapping_error(dev, dma_ptr))
1958                 return -ENOMEM;
1959
1960         tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1961         tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1962         tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1963                 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1964
1965         buffer_info->skb = NULL;
1966         buffer_info->dma_ptr = dma_ptr;
1967         buffer_info->buffer_length = first_buffer_length;
1968         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1969
1970         tx->frame_data0 = (first_buffer_length &
1971                 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1972                 TX_DESC_DATA0_DTYPE_DATA_ |
1973                 TX_DESC_DATA0_FS_ |
1974                 TX_DESC_DATA0_FCS_;
1975         if (time_stamp)
1976                 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1977
1978         if (check_sum)
1979                 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1980                                    TX_DESC_DATA0_IPE_ |
1981                                    TX_DESC_DATA0_TPE_;
1982
1983         /* data0 will be programmed in one of other frame assembler functions */
1984         return 0;
1985 }
1986
1987 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1988                                      unsigned int frame_length,
1989                                      int nr_frags)
1990 {
1991         /* called only from within lan743x_tx_xmit_frame.
1992          * assuming tx->ring_lock has already been acquired.
1993          */
1994         struct lan743x_tx_descriptor *tx_descriptor = NULL;
1995         struct lan743x_tx_buffer_info *buffer_info = NULL;
1996
1997         /* wrap up previous descriptor */
1998         tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1999         if (nr_frags <= 0) {
2000                 tx->frame_data0 |= TX_DESC_DATA0_LS_;
2001                 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
2002         }
2003         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
2004         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
2005
2006         /* move to next descriptor */
2007         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
2008         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
2009         buffer_info = &tx->buffer_info[tx->frame_tail];
2010
2011         /* add extension descriptor */
2012         tx_descriptor->data1 = 0;
2013         tx_descriptor->data2 = 0;
2014         tx_descriptor->data3 = 0;
2015
2016         buffer_info->skb = NULL;
2017         buffer_info->dma_ptr = 0;
2018         buffer_info->buffer_length = 0;
2019         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
2020
2021         tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
2022                           TX_DESC_DATA0_DTYPE_EXT_ |
2023                           TX_DESC_DATA0_EXT_LSO_;
2024
2025         /* data0 will be programmed in one of other frame assembler functions */
2026 }
2027
2028 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
2029                                          const skb_frag_t *fragment,
2030                                          unsigned int frame_length)
2031 {
2032         /* called only from within lan743x_tx_xmit_frame
2033          * assuming tx->ring_lock has already been acquired
2034          */
2035         struct lan743x_tx_descriptor *tx_descriptor = NULL;
2036         struct lan743x_tx_buffer_info *buffer_info = NULL;
2037         struct lan743x_adapter *adapter = tx->adapter;
2038         struct device *dev = &adapter->pdev->dev;
2039         unsigned int fragment_length = 0;
2040         dma_addr_t dma_ptr;
2041
2042         fragment_length = skb_frag_size(fragment);
2043         if (!fragment_length)
2044                 return 0;
2045
2046         /* wrap up previous descriptor */
2047         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
2048         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
2049
2050         /* move to next descriptor */
2051         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
2052         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
2053         buffer_info = &tx->buffer_info[tx->frame_tail];
2054         dma_ptr = skb_frag_dma_map(dev, fragment,
2055                                    0, fragment_length,
2056                                    DMA_TO_DEVICE);
2057         if (dma_mapping_error(dev, dma_ptr)) {
2058                 int desc_index;
2059
2060                 /* cleanup all previously setup descriptors */
2061                 desc_index = tx->frame_first;
2062                 while (desc_index != tx->frame_tail) {
2063                         lan743x_tx_release_desc(tx, desc_index, true);
2064                         desc_index = lan743x_tx_next_index(tx, desc_index);
2065                 }
2066                 dma_wmb();
2067                 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
2068                 tx->frame_first = 0;
2069                 tx->frame_data0 = 0;
2070                 tx->frame_tail = 0;
2071                 return -ENOMEM;
2072         }
2073
2074         tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
2075         tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
2076         tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
2077                                TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
2078
2079         buffer_info->skb = NULL;
2080         buffer_info->dma_ptr = dma_ptr;
2081         buffer_info->buffer_length = fragment_length;
2082         buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
2083         buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
2084
2085         tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
2086                           TX_DESC_DATA0_DTYPE_DATA_ |
2087                           TX_DESC_DATA0_FCS_;
2088
2089         /* data0 will be programmed in one of other frame assembler functions */
2090         return 0;
2091 }
2092
2093 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
2094                                  struct sk_buff *skb,
2095                                  bool time_stamp,
2096                                  bool ignore_sync)
2097 {
2098         /* called only from within lan743x_tx_xmit_frame
2099          * assuming tx->ring_lock has already been acquired
2100          */
2101         struct lan743x_tx_descriptor *tx_descriptor = NULL;
2102         struct lan743x_tx_buffer_info *buffer_info = NULL;
2103         struct lan743x_adapter *adapter = tx->adapter;
2104         u32 tx_tail_flags = 0;
2105
2106         /* wrap up previous descriptor */
2107         if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
2108             TX_DESC_DATA0_DTYPE_DATA_) {
2109                 tx->frame_data0 |= TX_DESC_DATA0_LS_;
2110                 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
2111         }
2112
2113         tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
2114         buffer_info = &tx->buffer_info[tx->frame_tail];
2115         buffer_info->skb = skb;
2116         if (time_stamp)
2117                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
2118         if (ignore_sync)
2119                 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
2120
2121         tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
2122         tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
2123         tx->last_tail = tx->frame_tail;
2124
2125         dma_wmb();
2126
2127         if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2128                 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
2129         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
2130                 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
2131                 TX_TAIL_SET_TOP_INT_EN_;
2132
2133         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
2134                           tx_tail_flags | tx->frame_tail);
2135         tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
2136 }
2137
2138 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
2139                                          struct sk_buff *skb)
2140 {
2141         int required_number_of_descriptors = 0;
2142         unsigned int start_frame_length = 0;
2143         netdev_tx_t retval = NETDEV_TX_OK;
2144         unsigned int frame_length = 0;
2145         unsigned int head_length = 0;
2146         unsigned long irq_flags = 0;
2147         bool do_timestamp = false;
2148         bool ignore_sync = false;
2149         struct netdev_queue *txq;
2150         int nr_frags = 0;
2151         bool gso = false;
2152         int j;
2153
2154         required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
2155
2156         spin_lock_irqsave(&tx->ring_lock, irq_flags);
2157         if (required_number_of_descriptors >
2158                 lan743x_tx_get_avail_desc(tx)) {
2159                 if (required_number_of_descriptors > (tx->ring_size - 1)) {
2160                         dev_kfree_skb_irq(skb);
2161                 } else {
2162                         /* save how many descriptors we needed to restart the queue */
2163                         tx->rqd_descriptors = required_number_of_descriptors;
2164                         retval = NETDEV_TX_BUSY;
2165                         txq = netdev_get_tx_queue(tx->adapter->netdev,
2166                                                   tx->channel_number);
2167                         netif_tx_stop_queue(txq);
2168                 }
2169                 goto unlock;
2170         }
2171
2172         /* space available, transmit skb  */
2173         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
2174             (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
2175             (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
2176                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2177                 do_timestamp = true;
2178                 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
2179                         ignore_sync = true;
2180         }
2181         head_length = skb_headlen(skb);
2182         frame_length = skb_pagelen(skb);
2183         nr_frags = skb_shinfo(skb)->nr_frags;
2184         start_frame_length = frame_length;
2185         gso = skb_is_gso(skb);
2186         if (gso) {
2187                 start_frame_length = max(skb_shinfo(skb)->gso_size,
2188                                          (unsigned short)8);
2189         }
2190
2191         if (lan743x_tx_frame_start(tx,
2192                                    skb->data, head_length,
2193                                    start_frame_length,
2194                                    do_timestamp,
2195                                    skb->ip_summed == CHECKSUM_PARTIAL)) {
2196                 dev_kfree_skb_irq(skb);
2197                 goto unlock;
2198         }
2199         tx->frame_count++;
2200
2201         if (gso)
2202                 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
2203
2204         if (nr_frags <= 0)
2205                 goto finish;
2206
2207         for (j = 0; j < nr_frags; j++) {
2208                 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
2209
2210                 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
2211                         /* upon error no need to call
2212                          *      lan743x_tx_frame_end
2213                          * frame assembler clean up was performed inside
2214                          *      lan743x_tx_frame_add_fragment
2215                          */
2216                         dev_kfree_skb_irq(skb);
2217                         goto unlock;
2218                 }
2219         }
2220
2221 finish:
2222         lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
2223
2224 unlock:
2225         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
2226         return retval;
2227 }
2228
2229 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
2230 {
2231         struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
2232         struct lan743x_adapter *adapter = tx->adapter;
2233         unsigned long irq_flags = 0;
2234         struct netdev_queue *txq;
2235         u32 ioc_bit = 0;
2236
2237         ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
2238         lan743x_csr_read(adapter, DMAC_INT_STS);
2239         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
2240                 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
2241         spin_lock_irqsave(&tx->ring_lock, irq_flags);
2242
2243         /* clean up tx ring */
2244         lan743x_tx_release_completed_descriptors(tx);
2245         txq = netdev_get_tx_queue(adapter->netdev, tx->channel_number);
2246         if (netif_tx_queue_stopped(txq)) {
2247                 if (tx->rqd_descriptors) {
2248                         if (tx->rqd_descriptors <=
2249                             lan743x_tx_get_avail_desc(tx)) {
2250                                 tx->rqd_descriptors = 0;
2251                                 netif_tx_wake_queue(txq);
2252                         }
2253                 } else {
2254                         netif_tx_wake_queue(txq);
2255                 }
2256         }
2257         spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
2258
2259         if (!napi_complete(napi))
2260                 goto done;
2261
2262         /* enable isr */
2263         lan743x_csr_write(adapter, INT_EN_SET,
2264                           INT_BIT_DMA_TX_(tx->channel_number));
2265         lan743x_csr_read(adapter, INT_STS);
2266
2267 done:
2268         return 0;
2269 }
2270
2271 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
2272 {
2273         if (tx->head_cpu_ptr) {
2274                 dma_free_coherent(&tx->adapter->pdev->dev,
2275                                   sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
2276                                   tx->head_dma_ptr);
2277                 tx->head_cpu_ptr = NULL;
2278                 tx->head_dma_ptr = 0;
2279         }
2280         kfree(tx->buffer_info);
2281         tx->buffer_info = NULL;
2282
2283         if (tx->ring_cpu_ptr) {
2284                 dma_free_coherent(&tx->adapter->pdev->dev,
2285                                   tx->ring_allocation_size, tx->ring_cpu_ptr,
2286                                   tx->ring_dma_ptr);
2287                 tx->ring_allocation_size = 0;
2288                 tx->ring_cpu_ptr = NULL;
2289                 tx->ring_dma_ptr = 0;
2290         }
2291         tx->ring_size = 0;
2292 }
2293
2294 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
2295 {
2296         size_t ring_allocation_size = 0;
2297         void *cpu_ptr = NULL;
2298         dma_addr_t dma_ptr;
2299         int ret = -ENOMEM;
2300
2301         tx->ring_size = LAN743X_TX_RING_SIZE;
2302         if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
2303                 ret = -EINVAL;
2304                 goto cleanup;
2305         }
2306         if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
2307                                       DMA_BIT_MASK(64))) {
2308                 dev_warn(&tx->adapter->pdev->dev,
2309                          "lan743x_: No suitable DMA available\n");
2310                 ret = -ENOMEM;
2311                 goto cleanup;
2312         }
2313         ring_allocation_size = ALIGN(tx->ring_size *
2314                                      sizeof(struct lan743x_tx_descriptor),
2315                                      PAGE_SIZE);
2316         dma_ptr = 0;
2317         cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
2318                                      ring_allocation_size, &dma_ptr, GFP_KERNEL);
2319         if (!cpu_ptr) {
2320                 ret = -ENOMEM;
2321                 goto cleanup;
2322         }
2323
2324         tx->ring_allocation_size = ring_allocation_size;
2325         tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
2326         tx->ring_dma_ptr = dma_ptr;
2327
2328         cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
2329         if (!cpu_ptr) {
2330                 ret = -ENOMEM;
2331                 goto cleanup;
2332         }
2333         tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
2334         dma_ptr = 0;
2335         cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
2336                                      sizeof(*tx->head_cpu_ptr), &dma_ptr,
2337                                      GFP_KERNEL);
2338         if (!cpu_ptr) {
2339                 ret = -ENOMEM;
2340                 goto cleanup;
2341         }
2342
2343         tx->head_cpu_ptr = cpu_ptr;
2344         tx->head_dma_ptr = dma_ptr;
2345         if (tx->head_dma_ptr & 0x3) {
2346                 ret = -ENOMEM;
2347                 goto cleanup;
2348         }
2349
2350         return 0;
2351
2352 cleanup:
2353         lan743x_tx_ring_cleanup(tx);
2354         return ret;
2355 }
2356
2357 static void lan743x_tx_close(struct lan743x_tx *tx)
2358 {
2359         struct lan743x_adapter *adapter = tx->adapter;
2360
2361         lan743x_csr_write(adapter,
2362                           DMAC_CMD,
2363                           DMAC_CMD_STOP_T_(tx->channel_number));
2364         lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
2365
2366         lan743x_csr_write(adapter,
2367                           DMAC_INT_EN_CLR,
2368                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
2369         lan743x_csr_write(adapter, INT_EN_CLR,
2370                           INT_BIT_DMA_TX_(tx->channel_number));
2371         napi_disable(&tx->napi);
2372         netif_napi_del(&tx->napi);
2373
2374         lan743x_csr_write(adapter, FCT_TX_CTL,
2375                           FCT_TX_CTL_DIS_(tx->channel_number));
2376         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
2377                                  FCT_TX_CTL_EN_(tx->channel_number),
2378                                  0, 1000, 20000, 100);
2379
2380         lan743x_tx_release_all_descriptors(tx);
2381
2382         tx->rqd_descriptors = 0;
2383
2384         lan743x_tx_ring_cleanup(tx);
2385 }
2386
2387 static int lan743x_tx_open(struct lan743x_tx *tx)
2388 {
2389         struct lan743x_adapter *adapter = NULL;
2390         u32 data = 0;
2391         int ret;
2392
2393         adapter = tx->adapter;
2394         ret = lan743x_tx_ring_init(tx);
2395         if (ret)
2396                 return ret;
2397
2398         /* initialize fifo */
2399         lan743x_csr_write(adapter, FCT_TX_CTL,
2400                           FCT_TX_CTL_RESET_(tx->channel_number));
2401         lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
2402                                  FCT_TX_CTL_RESET_(tx->channel_number),
2403                                  0, 1000, 20000, 100);
2404
2405         /* enable fifo */
2406         lan743x_csr_write(adapter, FCT_TX_CTL,
2407                           FCT_TX_CTL_EN_(tx->channel_number));
2408
2409         /* reset tx channel */
2410         lan743x_csr_write(adapter, DMAC_CMD,
2411                           DMAC_CMD_TX_SWR_(tx->channel_number));
2412         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2413                                  DMAC_CMD_TX_SWR_(tx->channel_number),
2414                                  0, 1000, 20000, 100);
2415
2416         /* Write TX_BASE_ADDR */
2417         lan743x_csr_write(adapter,
2418                           TX_BASE_ADDRH(tx->channel_number),
2419                           DMA_ADDR_HIGH32(tx->ring_dma_ptr));
2420         lan743x_csr_write(adapter,
2421                           TX_BASE_ADDRL(tx->channel_number),
2422                           DMA_ADDR_LOW32(tx->ring_dma_ptr));
2423
2424         /* Write TX_CFG_B */
2425         data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
2426         data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
2427         data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
2428         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2429                 data |= TX_CFG_B_TDMABL_512_;
2430         lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
2431
2432         /* Write TX_CFG_A */
2433         data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
2434         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2435                 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
2436                 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
2437                 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
2438                 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
2439         }
2440         lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
2441
2442         /* Write TX_HEAD_WRITEBACK_ADDR */
2443         lan743x_csr_write(adapter,
2444                           TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
2445                           DMA_ADDR_HIGH32(tx->head_dma_ptr));
2446         lan743x_csr_write(adapter,
2447                           TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
2448                           DMA_ADDR_LOW32(tx->head_dma_ptr));
2449
2450         /* set last head */
2451         tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
2452
2453         /* write TX_TAIL */
2454         tx->last_tail = 0;
2455         lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
2456                           (u32)(tx->last_tail));
2457         tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2458                                                          INT_BIT_DMA_TX_
2459                                                          (tx->channel_number));
2460         netif_napi_add_tx_weight(adapter->netdev,
2461                                  &tx->napi, lan743x_tx_napi_poll,
2462                                  NAPI_POLL_WEIGHT);
2463         napi_enable(&tx->napi);
2464
2465         data = 0;
2466         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2467                 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
2468         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2469                 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
2470         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2471                 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
2472         if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2473                 data |= TX_CFG_C_TX_INT_EN_R2C_;
2474         lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
2475
2476         if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
2477                 lan743x_csr_write(adapter, INT_EN_SET,
2478                                   INT_BIT_DMA_TX_(tx->channel_number));
2479         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2480                           DMAC_INT_BIT_TX_IOC_(tx->channel_number));
2481
2482         /*  start dmac channel */
2483         lan743x_csr_write(adapter, DMAC_CMD,
2484                           DMAC_CMD_START_T_(tx->channel_number));
2485         return 0;
2486 }
2487
2488 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
2489 {
2490         return ((++index) % rx->ring_size);
2491 }
2492
2493 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
2494 {
2495         /* update the tail once per 8 descriptors */
2496         if ((index & 7) == 7)
2497                 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
2498                                   index);
2499 }
2500
2501 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
2502                                         gfp_t gfp)
2503 {
2504         struct net_device *netdev = rx->adapter->netdev;
2505         struct device *dev = &rx->adapter->pdev->dev;
2506         struct lan743x_rx_buffer_info *buffer_info;
2507         unsigned int buffer_length, used_length;
2508         struct lan743x_rx_descriptor *descriptor;
2509         struct sk_buff *skb;
2510         dma_addr_t dma_ptr;
2511
2512         buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
2513
2514         descriptor = &rx->ring_cpu_ptr[index];
2515         buffer_info = &rx->buffer_info[index];
2516         skb = __netdev_alloc_skb(netdev, buffer_length, gfp);
2517         if (!skb)
2518                 return -ENOMEM;
2519         dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
2520         if (dma_mapping_error(dev, dma_ptr)) {
2521                 dev_kfree_skb_any(skb);
2522                 return -ENOMEM;
2523         }
2524         if (buffer_info->dma_ptr) {
2525                 /* sync used area of buffer only */
2526                 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
2527                         /* frame length is valid only if LS bit is set.
2528                          * it's a safe upper bound for the used area in this
2529                          * buffer.
2530                          */
2531                         used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
2532                                           (le32_to_cpu(descriptor->data0)),
2533                                           buffer_info->buffer_length);
2534                 else
2535                         used_length = buffer_info->buffer_length;
2536                 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
2537                                         used_length,
2538                                         DMA_FROM_DEVICE);
2539                 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
2540                                        buffer_info->buffer_length,
2541                                        DMA_FROM_DEVICE,
2542                                        DMA_ATTR_SKIP_CPU_SYNC);
2543         }
2544
2545         buffer_info->skb = skb;
2546         buffer_info->dma_ptr = dma_ptr;
2547         buffer_info->buffer_length = buffer_length;
2548         descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2549         descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2550         descriptor->data3 = 0;
2551         descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2552                             (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2553         lan743x_rx_update_tail(rx, index);
2554
2555         return 0;
2556 }
2557
2558 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
2559 {
2560         struct lan743x_rx_buffer_info *buffer_info;
2561         struct lan743x_rx_descriptor *descriptor;
2562
2563         descriptor = &rx->ring_cpu_ptr[index];
2564         buffer_info = &rx->buffer_info[index];
2565
2566         descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2567         descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2568         descriptor->data3 = 0;
2569         descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2570                             ((buffer_info->buffer_length) &
2571                             RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2572         lan743x_rx_update_tail(rx, index);
2573 }
2574
2575 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2576 {
2577         struct lan743x_rx_buffer_info *buffer_info;
2578         struct lan743x_rx_descriptor *descriptor;
2579
2580         descriptor = &rx->ring_cpu_ptr[index];
2581         buffer_info = &rx->buffer_info[index];
2582
2583         memset(descriptor, 0, sizeof(*descriptor));
2584
2585         if (buffer_info->dma_ptr) {
2586                 dma_unmap_single(&rx->adapter->pdev->dev,
2587                                  buffer_info->dma_ptr,
2588                                  buffer_info->buffer_length,
2589                                  DMA_FROM_DEVICE);
2590                 buffer_info->dma_ptr = 0;
2591         }
2592
2593         if (buffer_info->skb) {
2594                 dev_kfree_skb(buffer_info->skb);
2595                 buffer_info->skb = NULL;
2596         }
2597
2598         memset(buffer_info, 0, sizeof(*buffer_info));
2599 }
2600
2601 static struct sk_buff *
2602 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2603 {
2604         if (skb_linearize(skb)) {
2605                 dev_kfree_skb_irq(skb);
2606                 return NULL;
2607         }
2608         frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2609         if (skb->len > frame_length) {
2610                 skb->tail -= skb->len - frame_length;
2611                 skb->len = frame_length;
2612         }
2613         return skb;
2614 }
2615
2616 static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2617 {
2618         int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2619         struct lan743x_rx_descriptor *descriptor, *desc_ext;
2620         struct net_device *netdev = rx->adapter->netdev;
2621         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2622         struct lan743x_rx_buffer_info *buffer_info;
2623         int frame_length, buffer_length;
2624         bool is_ice, is_tce, is_icsm;
2625         int extension_index = -1;
2626         bool is_last, is_first;
2627         struct sk_buff *skb;
2628
2629         if (current_head_index < 0 || current_head_index >= rx->ring_size)
2630                 goto done;
2631
2632         if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2633                 goto done;
2634
2635         if (rx->last_head == current_head_index)
2636                 goto done;
2637
2638         descriptor = &rx->ring_cpu_ptr[rx->last_head];
2639         if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2640                 goto done;
2641         buffer_info = &rx->buffer_info[rx->last_head];
2642
2643         is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2644         is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2645
2646         if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2647                 /* extension is expected to follow */
2648                 int index = lan743x_rx_next_index(rx, rx->last_head);
2649
2650                 if (index == current_head_index)
2651                         /* extension not yet available */
2652                         goto done;
2653                 desc_ext = &rx->ring_cpu_ptr[index];
2654                 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2655                         /* extension not yet available */
2656                         goto done;
2657                 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2658                         goto move_forward;
2659                 extension_index = index;
2660         }
2661
2662         /* Only the last buffer in a multi-buffer frame contains the total frame
2663          * length. The chip occasionally sends more buffers than strictly
2664          * required to reach the total frame length.
2665          * Handle this by adding all buffers to the skb in their entirety.
2666          * Once the real frame length is known, trim the skb.
2667          */
2668         frame_length =
2669                 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2670         buffer_length = buffer_info->buffer_length;
2671         is_ice = le32_to_cpu(descriptor->data1) & RX_DESC_DATA1_STATUS_ICE_;
2672         is_tce = le32_to_cpu(descriptor->data1) & RX_DESC_DATA1_STATUS_TCE_;
2673         is_icsm = le32_to_cpu(descriptor->data1) & RX_DESC_DATA1_STATUS_ICSM_;
2674
2675         netdev_dbg(netdev, "%s%schunk: %d/%d",
2676                    is_first ? "first " : "      ",
2677                    is_last  ? "last  " : "      ",
2678                    frame_length, buffer_length);
2679
2680         /* save existing skb, allocate new skb and map to dma */
2681         skb = buffer_info->skb;
2682         if (lan743x_rx_init_ring_element(rx, rx->last_head,
2683                                          GFP_ATOMIC | GFP_DMA)) {
2684                 /* failed to allocate next skb.
2685                  * Memory is very low.
2686                  * Drop this packet and reuse buffer.
2687                  */
2688                 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2689                 /* drop packet that was being assembled */
2690                 dev_kfree_skb_irq(rx->skb_head);
2691                 rx->skb_head = NULL;
2692                 goto process_extension;
2693         }
2694
2695         /* add buffers to skb via skb->frag_list */
2696         if (is_first) {
2697                 skb_reserve(skb, RX_HEAD_PADDING);
2698                 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2699                 if (rx->skb_head)
2700                         dev_kfree_skb_irq(rx->skb_head);
2701                 rx->skb_head = skb;
2702         } else if (rx->skb_head) {
2703                 skb_put(skb, buffer_length);
2704                 if (skb_shinfo(rx->skb_head)->frag_list)
2705                         rx->skb_tail->next = skb;
2706                 else
2707                         skb_shinfo(rx->skb_head)->frag_list = skb;
2708                 rx->skb_tail = skb;
2709                 rx->skb_head->len += skb->len;
2710                 rx->skb_head->data_len += skb->len;
2711                 rx->skb_head->truesize += skb->truesize;
2712         } else {
2713                 /* packet to assemble has already been dropped because one or
2714                  * more of its buffers could not be allocated
2715                  */
2716                 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2717                 dev_kfree_skb_irq(skb);
2718         }
2719
2720 process_extension:
2721         if (extension_index >= 0) {
2722                 u32 ts_sec;
2723                 u32 ts_nsec;
2724
2725                 ts_sec = le32_to_cpu(desc_ext->data1);
2726                 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2727                           RX_DESC_DATA2_TS_NS_MASK_);
2728                 if (rx->skb_head)
2729                         skb_hwtstamps(rx->skb_head)->hwtstamp =
2730                                 ktime_set(ts_sec, ts_nsec);
2731                 lan743x_rx_reuse_ring_element(rx, extension_index);
2732                 rx->last_head = extension_index;
2733                 netdev_dbg(netdev, "process extension");
2734         }
2735
2736         if (is_last && rx->skb_head)
2737                 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2738
2739         if (is_last && rx->skb_head) {
2740                 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2741                                                         rx->adapter->netdev);
2742                 if (rx->adapter->netdev->features & NETIF_F_RXCSUM) {
2743                         if (!is_ice && !is_tce && !is_icsm)
2744                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2745                 }
2746                 netdev_dbg(netdev, "sending %d byte frame to OS",
2747                            rx->skb_head->len);
2748                 napi_gro_receive(&rx->napi, rx->skb_head);
2749                 rx->skb_head = NULL;
2750         }
2751
2752 move_forward:
2753         /* push tail and head forward */
2754         rx->last_tail = rx->last_head;
2755         rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2756         result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2757 done:
2758         return result;
2759 }
2760
2761 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2762 {
2763         struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2764         struct lan743x_adapter *adapter = rx->adapter;
2765         int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2766         u32 rx_tail_flags = 0;
2767         int count;
2768
2769         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2770                 /* clear int status bit before reading packet */
2771                 lan743x_csr_write(adapter, DMAC_INT_STS,
2772                                   DMAC_INT_BIT_RXFRM_(rx->channel_number));
2773         }
2774         for (count = 0; count < weight; count++) {
2775                 result = lan743x_rx_process_buffer(rx);
2776                 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2777                         break;
2778         }
2779         rx->frame_count += count;
2780         if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2781                 return weight;
2782
2783         if (!napi_complete_done(napi, count))
2784                 return count;
2785
2786         /* re-arm interrupts, must write to rx tail on some chip variants */
2787         if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2788                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2789         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2790                 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2791         } else {
2792                 lan743x_csr_write(adapter, INT_EN_SET,
2793                                   INT_BIT_DMA_RX_(rx->channel_number));
2794         }
2795
2796         if (rx_tail_flags)
2797                 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2798                                   rx_tail_flags | rx->last_tail);
2799
2800         return count;
2801 }
2802
2803 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2804 {
2805         if (rx->buffer_info && rx->ring_cpu_ptr) {
2806                 int index;
2807
2808                 for (index = 0; index < rx->ring_size; index++)
2809                         lan743x_rx_release_ring_element(rx, index);
2810         }
2811
2812         if (rx->head_cpu_ptr) {
2813                 dma_free_coherent(&rx->adapter->pdev->dev,
2814                                   sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2815                                   rx->head_dma_ptr);
2816                 rx->head_cpu_ptr = NULL;
2817                 rx->head_dma_ptr = 0;
2818         }
2819
2820         kfree(rx->buffer_info);
2821         rx->buffer_info = NULL;
2822
2823         if (rx->ring_cpu_ptr) {
2824                 dma_free_coherent(&rx->adapter->pdev->dev,
2825                                   rx->ring_allocation_size, rx->ring_cpu_ptr,
2826                                   rx->ring_dma_ptr);
2827                 rx->ring_allocation_size = 0;
2828                 rx->ring_cpu_ptr = NULL;
2829                 rx->ring_dma_ptr = 0;
2830         }
2831
2832         rx->ring_size = 0;
2833         rx->last_head = 0;
2834 }
2835
2836 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2837 {
2838         size_t ring_allocation_size = 0;
2839         dma_addr_t dma_ptr = 0;
2840         void *cpu_ptr = NULL;
2841         int ret = -ENOMEM;
2842         int index = 0;
2843
2844         rx->ring_size = LAN743X_RX_RING_SIZE;
2845         if (rx->ring_size <= 1) {
2846                 ret = -EINVAL;
2847                 goto cleanup;
2848         }
2849         if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2850                 ret = -EINVAL;
2851                 goto cleanup;
2852         }
2853         if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2854                                       DMA_BIT_MASK(64))) {
2855                 dev_warn(&rx->adapter->pdev->dev,
2856                          "lan743x_: No suitable DMA available\n");
2857                 ret = -ENOMEM;
2858                 goto cleanup;
2859         }
2860         ring_allocation_size = ALIGN(rx->ring_size *
2861                                      sizeof(struct lan743x_rx_descriptor),
2862                                      PAGE_SIZE);
2863         dma_ptr = 0;
2864         cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2865                                      ring_allocation_size, &dma_ptr, GFP_KERNEL);
2866         if (!cpu_ptr) {
2867                 ret = -ENOMEM;
2868                 goto cleanup;
2869         }
2870         rx->ring_allocation_size = ring_allocation_size;
2871         rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2872         rx->ring_dma_ptr = dma_ptr;
2873
2874         cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2875                           GFP_KERNEL);
2876         if (!cpu_ptr) {
2877                 ret = -ENOMEM;
2878                 goto cleanup;
2879         }
2880         rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2881         dma_ptr = 0;
2882         cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2883                                      sizeof(*rx->head_cpu_ptr), &dma_ptr,
2884                                      GFP_KERNEL);
2885         if (!cpu_ptr) {
2886                 ret = -ENOMEM;
2887                 goto cleanup;
2888         }
2889
2890         rx->head_cpu_ptr = cpu_ptr;
2891         rx->head_dma_ptr = dma_ptr;
2892         if (rx->head_dma_ptr & 0x3) {
2893                 ret = -ENOMEM;
2894                 goto cleanup;
2895         }
2896
2897         rx->last_head = 0;
2898         for (index = 0; index < rx->ring_size; index++) {
2899                 ret = lan743x_rx_init_ring_element(rx, index, GFP_KERNEL);
2900                 if (ret)
2901                         goto cleanup;
2902         }
2903         return 0;
2904
2905 cleanup:
2906         netif_warn(rx->adapter, ifup, rx->adapter->netdev,
2907                    "Error allocating memory for LAN743x\n");
2908
2909         lan743x_rx_ring_cleanup(rx);
2910         return ret;
2911 }
2912
2913 static void lan743x_rx_close(struct lan743x_rx *rx)
2914 {
2915         struct lan743x_adapter *adapter = rx->adapter;
2916
2917         lan743x_csr_write(adapter, FCT_RX_CTL,
2918                           FCT_RX_CTL_DIS_(rx->channel_number));
2919         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2920                                  FCT_RX_CTL_EN_(rx->channel_number),
2921                                  0, 1000, 20000, 100);
2922
2923         lan743x_csr_write(adapter, DMAC_CMD,
2924                           DMAC_CMD_STOP_R_(rx->channel_number));
2925         lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2926
2927         lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2928                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
2929         lan743x_csr_write(adapter, INT_EN_CLR,
2930                           INT_BIT_DMA_RX_(rx->channel_number));
2931         napi_disable(&rx->napi);
2932
2933         netif_napi_del(&rx->napi);
2934
2935         lan743x_rx_ring_cleanup(rx);
2936 }
2937
2938 static int lan743x_rx_open(struct lan743x_rx *rx)
2939 {
2940         struct lan743x_adapter *adapter = rx->adapter;
2941         u32 data = 0;
2942         int ret;
2943
2944         rx->frame_count = 0;
2945         ret = lan743x_rx_ring_init(rx);
2946         if (ret)
2947                 goto return_error;
2948
2949         netif_napi_add(adapter->netdev, &rx->napi, lan743x_rx_napi_poll);
2950
2951         lan743x_csr_write(adapter, DMAC_CMD,
2952                           DMAC_CMD_RX_SWR_(rx->channel_number));
2953         lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2954                                  DMAC_CMD_RX_SWR_(rx->channel_number),
2955                                  0, 1000, 20000, 100);
2956
2957         /* set ring base address */
2958         lan743x_csr_write(adapter,
2959                           RX_BASE_ADDRH(rx->channel_number),
2960                           DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2961         lan743x_csr_write(adapter,
2962                           RX_BASE_ADDRL(rx->channel_number),
2963                           DMA_ADDR_LOW32(rx->ring_dma_ptr));
2964
2965         /* set rx write back address */
2966         lan743x_csr_write(adapter,
2967                           RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2968                           DMA_ADDR_HIGH32(rx->head_dma_ptr));
2969         lan743x_csr_write(adapter,
2970                           RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2971                           DMA_ADDR_LOW32(rx->head_dma_ptr));
2972         data = RX_CFG_A_RX_HP_WB_EN_;
2973         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2974                 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2975                         RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2976                         RX_CFG_A_RX_PF_THRES_SET_(16) |
2977                         RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2978         }
2979
2980         /* set RX_CFG_A */
2981         lan743x_csr_write(adapter,
2982                           RX_CFG_A(rx->channel_number), data);
2983
2984         /* set RX_CFG_B */
2985         data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2986         data &= ~RX_CFG_B_RX_PAD_MASK_;
2987         if (!RX_HEAD_PADDING)
2988                 data |= RX_CFG_B_RX_PAD_0_;
2989         else
2990                 data |= RX_CFG_B_RX_PAD_2_;
2991         data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2992         data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2993         if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2994                 data |= RX_CFG_B_RDMABL_512_;
2995
2996         lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2997         rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2998                                                          INT_BIT_DMA_RX_
2999                                                          (rx->channel_number));
3000
3001         /* set RX_CFG_C */
3002         data = 0;
3003         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
3004                 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
3005         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
3006                 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
3007         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
3008                 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
3009         if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
3010                 data |= RX_CFG_C_RX_INT_EN_R2C_;
3011         lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
3012
3013         rx->last_tail = ((u32)(rx->ring_size - 1));
3014         lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
3015                           rx->last_tail);
3016         rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
3017         if (rx->last_head) {
3018                 ret = -EIO;
3019                 goto napi_delete;
3020         }
3021
3022         napi_enable(&rx->napi);
3023
3024         lan743x_csr_write(adapter, INT_EN_SET,
3025                           INT_BIT_DMA_RX_(rx->channel_number));
3026         lan743x_csr_write(adapter, DMAC_INT_STS,
3027                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
3028         lan743x_csr_write(adapter, DMAC_INT_EN_SET,
3029                           DMAC_INT_BIT_RXFRM_(rx->channel_number));
3030         lan743x_csr_write(adapter, DMAC_CMD,
3031                           DMAC_CMD_START_R_(rx->channel_number));
3032
3033         /* initialize fifo */
3034         lan743x_csr_write(adapter, FCT_RX_CTL,
3035                           FCT_RX_CTL_RESET_(rx->channel_number));
3036         lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
3037                                  FCT_RX_CTL_RESET_(rx->channel_number),
3038                                  0, 1000, 20000, 100);
3039         lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
3040                           FCT_FLOW_CTL_REQ_EN_ |
3041                           FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
3042                           FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
3043
3044         /* enable fifo */
3045         lan743x_csr_write(adapter, FCT_RX_CTL,
3046                           FCT_RX_CTL_EN_(rx->channel_number));
3047         return 0;
3048
3049 napi_delete:
3050         netif_napi_del(&rx->napi);
3051         lan743x_rx_ring_cleanup(rx);
3052
3053 return_error:
3054         return ret;
3055 }
3056
3057 static int lan743x_netdev_close(struct net_device *netdev)
3058 {
3059         struct lan743x_adapter *adapter = netdev_priv(netdev);
3060         int index;
3061
3062         for (index = 0; index < adapter->used_tx_channels; index++)
3063                 lan743x_tx_close(&adapter->tx[index]);
3064
3065         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
3066                 lan743x_rx_close(&adapter->rx[index]);
3067
3068         lan743x_ptp_close(adapter);
3069
3070         lan743x_phy_close(adapter);
3071
3072         lan743x_mac_close(adapter);
3073
3074         lan743x_intr_close(adapter);
3075
3076         return 0;
3077 }
3078
3079 static int lan743x_netdev_open(struct net_device *netdev)
3080 {
3081         struct lan743x_adapter *adapter = netdev_priv(netdev);
3082         int index;
3083         int ret;
3084
3085         ret = lan743x_intr_open(adapter);
3086         if (ret)
3087                 goto return_error;
3088
3089         ret = lan743x_mac_open(adapter);
3090         if (ret)
3091                 goto close_intr;
3092
3093         ret = lan743x_phy_open(adapter);
3094         if (ret)
3095                 goto close_mac;
3096
3097         ret = lan743x_ptp_open(adapter);
3098         if (ret)
3099                 goto close_phy;
3100
3101         lan743x_rfe_open(adapter);
3102
3103         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
3104                 ret = lan743x_rx_open(&adapter->rx[index]);
3105                 if (ret)
3106                         goto close_rx;
3107         }
3108
3109         for (index = 0; index < adapter->used_tx_channels; index++) {
3110                 ret = lan743x_tx_open(&adapter->tx[index]);
3111                 if (ret)
3112                         goto close_tx;
3113         }
3114         return 0;
3115
3116 close_tx:
3117         for (index = 0; index < adapter->used_tx_channels; index++) {
3118                 if (adapter->tx[index].ring_cpu_ptr)
3119                         lan743x_tx_close(&adapter->tx[index]);
3120         }
3121
3122 close_rx:
3123         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
3124                 if (adapter->rx[index].ring_cpu_ptr)
3125                         lan743x_rx_close(&adapter->rx[index]);
3126         }
3127         lan743x_ptp_close(adapter);
3128
3129 close_phy:
3130         lan743x_phy_close(adapter);
3131
3132 close_mac:
3133         lan743x_mac_close(adapter);
3134
3135 close_intr:
3136         lan743x_intr_close(adapter);
3137
3138 return_error:
3139         netif_warn(adapter, ifup, adapter->netdev,
3140                    "Error opening LAN743x\n");
3141         return ret;
3142 }
3143
3144 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
3145                                              struct net_device *netdev)
3146 {
3147         struct lan743x_adapter *adapter = netdev_priv(netdev);
3148         u8 ch = 0;
3149
3150         if (adapter->is_pci11x1x)
3151                 ch = skb->queue_mapping % PCI11X1X_USED_TX_CHANNELS;
3152
3153         return lan743x_tx_xmit_frame(&adapter->tx[ch], skb);
3154 }
3155
3156 static int lan743x_netdev_ioctl(struct net_device *netdev,
3157                                 struct ifreq *ifr, int cmd)
3158 {
3159         if (!netif_running(netdev))
3160                 return -EINVAL;
3161         if (cmd == SIOCSHWTSTAMP)
3162                 return lan743x_ptp_ioctl(netdev, ifr, cmd);
3163         return phy_mii_ioctl(netdev->phydev, ifr, cmd);
3164 }
3165
3166 static void lan743x_netdev_set_multicast(struct net_device *netdev)
3167 {
3168         struct lan743x_adapter *adapter = netdev_priv(netdev);
3169
3170         lan743x_rfe_set_multicast(adapter);
3171 }
3172
3173 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
3174 {
3175         struct lan743x_adapter *adapter = netdev_priv(netdev);
3176         int ret = 0;
3177
3178         ret = lan743x_mac_set_mtu(adapter, new_mtu);
3179         if (!ret)
3180                 netdev->mtu = new_mtu;
3181         return ret;
3182 }
3183
3184 static void lan743x_netdev_get_stats64(struct net_device *netdev,
3185                                        struct rtnl_link_stats64 *stats)
3186 {
3187         struct lan743x_adapter *adapter = netdev_priv(netdev);
3188
3189         stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
3190         stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
3191         stats->rx_bytes = lan743x_csr_read(adapter,
3192                                            STAT_RX_UNICAST_BYTE_COUNT) +
3193                           lan743x_csr_read(adapter,
3194                                            STAT_RX_BROADCAST_BYTE_COUNT) +
3195                           lan743x_csr_read(adapter,
3196                                            STAT_RX_MULTICAST_BYTE_COUNT);
3197         stats->tx_bytes = lan743x_csr_read(adapter,
3198                                            STAT_TX_UNICAST_BYTE_COUNT) +
3199                           lan743x_csr_read(adapter,
3200                                            STAT_TX_BROADCAST_BYTE_COUNT) +
3201                           lan743x_csr_read(adapter,
3202                                            STAT_TX_MULTICAST_BYTE_COUNT);
3203         stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
3204                            lan743x_csr_read(adapter,
3205                                             STAT_RX_ALIGNMENT_ERRORS) +
3206                            lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
3207                            lan743x_csr_read(adapter,
3208                                             STAT_RX_UNDERSIZE_FRAME_ERRORS) +
3209                            lan743x_csr_read(adapter,
3210                                             STAT_RX_OVERSIZE_FRAME_ERRORS);
3211         stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
3212                            lan743x_csr_read(adapter,
3213                                             STAT_TX_EXCESS_DEFERRAL_ERRORS) +
3214                            lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
3215         stats->rx_dropped = lan743x_csr_read(adapter,
3216                                              STAT_RX_DROPPED_FRAMES);
3217         stats->tx_dropped = lan743x_csr_read(adapter,
3218                                              STAT_TX_EXCESSIVE_COLLISION);
3219         stats->multicast = lan743x_csr_read(adapter,
3220                                             STAT_RX_MULTICAST_FRAMES) +
3221                            lan743x_csr_read(adapter,
3222                                             STAT_TX_MULTICAST_FRAMES);
3223         stats->collisions = lan743x_csr_read(adapter,
3224                                              STAT_TX_SINGLE_COLLISIONS) +
3225                             lan743x_csr_read(adapter,
3226                                              STAT_TX_MULTIPLE_COLLISIONS) +
3227                             lan743x_csr_read(adapter,
3228                                              STAT_TX_LATE_COLLISIONS);
3229 }
3230
3231 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
3232                                           void *addr)
3233 {
3234         struct lan743x_adapter *adapter = netdev_priv(netdev);
3235         struct sockaddr *sock_addr = addr;
3236         int ret;
3237
3238         ret = eth_prepare_mac_addr_change(netdev, sock_addr);
3239         if (ret)
3240                 return ret;
3241         eth_hw_addr_set(netdev, sock_addr->sa_data);
3242         lan743x_mac_set_address(adapter, sock_addr->sa_data);
3243         lan743x_rfe_update_mac_address(adapter);
3244         return 0;
3245 }
3246
3247 static const struct net_device_ops lan743x_netdev_ops = {
3248         .ndo_open               = lan743x_netdev_open,
3249         .ndo_stop               = lan743x_netdev_close,
3250         .ndo_start_xmit         = lan743x_netdev_xmit_frame,
3251         .ndo_eth_ioctl          = lan743x_netdev_ioctl,
3252         .ndo_set_rx_mode        = lan743x_netdev_set_multicast,
3253         .ndo_change_mtu         = lan743x_netdev_change_mtu,
3254         .ndo_get_stats64        = lan743x_netdev_get_stats64,
3255         .ndo_set_mac_address    = lan743x_netdev_set_mac_address,
3256 };
3257
3258 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
3259 {
3260         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
3261 }
3262
3263 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
3264 {
3265         mdiobus_unregister(adapter->mdiobus);
3266 }
3267
3268 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
3269 {
3270         unregister_netdev(adapter->netdev);
3271
3272         lan743x_mdiobus_cleanup(adapter);
3273         lan743x_hardware_cleanup(adapter);
3274         lan743x_pci_cleanup(adapter);
3275 }
3276
3277 static void pci11x1x_set_rfe_rd_fifo_threshold(struct lan743x_adapter *adapter)
3278 {
3279         u16 rev = adapter->csr.id_rev & ID_REV_CHIP_REV_MASK_;
3280
3281         if (rev == ID_REV_CHIP_REV_PCI11X1X_B0_) {
3282                 u32 misc_ctl;
3283
3284                 misc_ctl = lan743x_csr_read(adapter, MISC_CTL_0);
3285                 misc_ctl &= ~MISC_CTL_0_RFE_READ_FIFO_MASK_;
3286                 misc_ctl |= FIELD_PREP(MISC_CTL_0_RFE_READ_FIFO_MASK_,
3287                                        RFE_RD_FIFO_TH_3_DWORDS);
3288                 lan743x_csr_write(adapter, MISC_CTL_0, misc_ctl);
3289         }
3290 }
3291
3292 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
3293                                  struct pci_dev *pdev)
3294 {
3295         struct lan743x_tx *tx;
3296         int index;
3297         int ret;
3298
3299         adapter->is_pci11x1x = is_pci11x1x_chip(adapter);
3300         if (adapter->is_pci11x1x) {
3301                 adapter->max_tx_channels = PCI11X1X_MAX_TX_CHANNELS;
3302                 adapter->used_tx_channels = PCI11X1X_USED_TX_CHANNELS;
3303                 adapter->max_vector_count = PCI11X1X_MAX_VECTOR_COUNT;
3304                 pci11x1x_strap_get_status(adapter);
3305                 spin_lock_init(&adapter->eth_syslock_spinlock);
3306                 mutex_init(&adapter->sgmii_rw_lock);
3307                 pci11x1x_set_rfe_rd_fifo_threshold(adapter);
3308         } else {
3309                 adapter->max_tx_channels = LAN743X_MAX_TX_CHANNELS;
3310                 adapter->used_tx_channels = LAN743X_USED_TX_CHANNELS;
3311                 adapter->max_vector_count = LAN743X_MAX_VECTOR_COUNT;
3312         }
3313
3314         adapter->intr.irq = adapter->pdev->irq;
3315         lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
3316
3317         ret = lan743x_gpio_init(adapter);
3318         if (ret)
3319                 return ret;
3320
3321         ret = lan743x_mac_init(adapter);
3322         if (ret)
3323                 return ret;
3324
3325         ret = lan743x_phy_init(adapter);
3326         if (ret)
3327                 return ret;
3328
3329         ret = lan743x_ptp_init(adapter);
3330         if (ret)
3331                 return ret;
3332
3333         lan743x_rfe_update_mac_address(adapter);
3334
3335         ret = lan743x_dmac_init(adapter);
3336         if (ret)
3337                 return ret;
3338
3339         for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
3340                 adapter->rx[index].adapter = adapter;
3341                 adapter->rx[index].channel_number = index;
3342         }
3343
3344         for (index = 0; index < adapter->used_tx_channels; index++) {
3345                 tx = &adapter->tx[index];
3346                 tx->adapter = adapter;
3347                 tx->channel_number = index;
3348                 spin_lock_init(&tx->ring_lock);
3349         }
3350
3351         return 0;
3352 }
3353
3354 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
3355 {
3356         u32 sgmii_ctl;
3357         int ret;
3358
3359         adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
3360         if (!(adapter->mdiobus)) {
3361                 ret = -ENOMEM;
3362                 goto return_error;
3363         }
3364
3365         adapter->mdiobus->priv = (void *)adapter;
3366         if (adapter->is_pci11x1x) {
3367                 if (adapter->is_sgmii_en) {
3368                         sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
3369                         sgmii_ctl |= SGMII_CTL_SGMII_ENABLE_;
3370                         sgmii_ctl &= ~SGMII_CTL_SGMII_POWER_DN_;
3371                         lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
3372                         netif_dbg(adapter, drv, adapter->netdev,
3373                                   "SGMII operation\n");
3374                         adapter->mdiobus->read = lan743x_mdiobus_read_c22;
3375                         adapter->mdiobus->write = lan743x_mdiobus_write_c22;
3376                         adapter->mdiobus->read_c45 = lan743x_mdiobus_read_c45;
3377                         adapter->mdiobus->write_c45 = lan743x_mdiobus_write_c45;
3378                         adapter->mdiobus->name = "lan743x-mdiobus-c45";
3379                         netif_dbg(adapter, drv, adapter->netdev,
3380                                   "lan743x-mdiobus-c45\n");
3381                 } else {
3382                         sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
3383                         sgmii_ctl &= ~SGMII_CTL_SGMII_ENABLE_;
3384                         sgmii_ctl |= SGMII_CTL_SGMII_POWER_DN_;
3385                         lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
3386                         netif_dbg(adapter, drv, adapter->netdev,
3387                                   "RGMII operation\n");
3388                         // Only C22 support when RGMII I/F
3389                         adapter->mdiobus->read = lan743x_mdiobus_read_c22;
3390                         adapter->mdiobus->write = lan743x_mdiobus_write_c22;
3391                         adapter->mdiobus->name = "lan743x-mdiobus";
3392                         netif_dbg(adapter, drv, adapter->netdev,
3393                                   "lan743x-mdiobus\n");
3394                 }
3395         } else {
3396                 adapter->mdiobus->read = lan743x_mdiobus_read_c22;
3397                 adapter->mdiobus->write = lan743x_mdiobus_write_c22;
3398                 adapter->mdiobus->name = "lan743x-mdiobus";
3399                 netif_dbg(adapter, drv, adapter->netdev, "lan743x-mdiobus\n");
3400         }
3401
3402         snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
3403                  "pci-%s", pci_name(adapter->pdev));
3404
3405         if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
3406                 /* LAN7430 uses internal phy at address 1 */
3407                 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
3408
3409         /* register mdiobus */
3410         ret = mdiobus_register(adapter->mdiobus);
3411         if (ret < 0)
3412                 goto return_error;
3413         return 0;
3414
3415 return_error:
3416         return ret;
3417 }
3418
3419 /* lan743x_pcidev_probe - Device Initialization Routine
3420  * @pdev: PCI device information struct
3421  * @id: entry in lan743x_pci_tbl
3422  *
3423  * Returns 0 on success, negative on failure
3424  *
3425  * initializes an adapter identified by a pci_dev structure.
3426  * The OS initialization, configuring of the adapter private structure,
3427  * and a hardware reset occur.
3428  **/
3429 static int lan743x_pcidev_probe(struct pci_dev *pdev,
3430                                 const struct pci_device_id *id)
3431 {
3432         struct lan743x_adapter *adapter = NULL;
3433         struct net_device *netdev = NULL;
3434         int ret = -ENODEV;
3435
3436         if (id->device == PCI_DEVICE_ID_SMSC_A011 ||
3437             id->device == PCI_DEVICE_ID_SMSC_A041) {
3438                 netdev = devm_alloc_etherdev_mqs(&pdev->dev,
3439                                                  sizeof(struct lan743x_adapter),
3440                                                  PCI11X1X_USED_TX_CHANNELS,
3441                                                  LAN743X_USED_RX_CHANNELS);
3442         } else {
3443                 netdev = devm_alloc_etherdev_mqs(&pdev->dev,
3444                                                  sizeof(struct lan743x_adapter),
3445                                                  LAN743X_USED_TX_CHANNELS,
3446                                                  LAN743X_USED_RX_CHANNELS);
3447         }
3448
3449         if (!netdev)
3450                 goto return_error;
3451
3452         SET_NETDEV_DEV(netdev, &pdev->dev);
3453         pci_set_drvdata(pdev, netdev);
3454         adapter = netdev_priv(netdev);
3455         adapter->netdev = netdev;
3456         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
3457                               NETIF_MSG_LINK | NETIF_MSG_IFUP |
3458                               NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
3459         netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
3460
3461         of_get_mac_address(pdev->dev.of_node, adapter->mac_address);
3462
3463         ret = lan743x_pci_init(adapter, pdev);
3464         if (ret)
3465                 goto return_error;
3466
3467         ret = lan743x_csr_init(adapter);
3468         if (ret)
3469                 goto cleanup_pci;
3470
3471         ret = lan743x_hardware_init(adapter, pdev);
3472         if (ret)
3473                 goto cleanup_pci;
3474
3475         ret = lan743x_mdiobus_init(adapter);
3476         if (ret)
3477                 goto cleanup_hardware;
3478
3479         adapter->netdev->netdev_ops = &lan743x_netdev_ops;
3480         adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
3481         adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO |
3482                                     NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
3483         adapter->netdev->hw_features = adapter->netdev->features;
3484
3485         /* carrier off reporting is important to ethtool even BEFORE open */
3486         netif_carrier_off(netdev);
3487
3488         ret = register_netdev(adapter->netdev);
3489         if (ret < 0)
3490                 goto cleanup_mdiobus;
3491         return 0;
3492
3493 cleanup_mdiobus:
3494         lan743x_mdiobus_cleanup(adapter);
3495
3496 cleanup_hardware:
3497         lan743x_hardware_cleanup(adapter);
3498
3499 cleanup_pci:
3500         lan743x_pci_cleanup(adapter);
3501
3502 return_error:
3503         pr_warn("Initialization failed\n");
3504         return ret;
3505 }
3506
3507 /**
3508  * lan743x_pcidev_remove - Device Removal Routine
3509  * @pdev: PCI device information struct
3510  *
3511  * this is called by the PCI subsystem to alert the driver
3512  * that it should release a PCI device.  This could be caused by a
3513  * Hot-Plug event, or because the driver is going to be removed from
3514  * memory.
3515  **/
3516 static void lan743x_pcidev_remove(struct pci_dev *pdev)
3517 {
3518         struct net_device *netdev = pci_get_drvdata(pdev);
3519         struct lan743x_adapter *adapter = netdev_priv(netdev);
3520
3521         lan743x_full_cleanup(adapter);
3522 }
3523
3524 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
3525 {
3526         struct net_device *netdev = pci_get_drvdata(pdev);
3527         struct lan743x_adapter *adapter = netdev_priv(netdev);
3528
3529         rtnl_lock();
3530         netif_device_detach(netdev);
3531
3532         /* close netdev when netdev is at running state.
3533          * For instance, it is true when system goes to sleep by pm-suspend
3534          * However, it is false when system goes to sleep by suspend GUI menu
3535          */
3536         if (netif_running(netdev))
3537                 lan743x_netdev_close(netdev);
3538         rtnl_unlock();
3539
3540 #ifdef CONFIG_PM
3541         pci_save_state(pdev);
3542 #endif
3543
3544         /* clean up lan743x portion */
3545         lan743x_hardware_cleanup(adapter);
3546 }
3547
3548 #ifdef CONFIG_PM_SLEEP
3549 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
3550 {
3551         return bitrev16(crc16(0xFFFF, buf, len));
3552 }
3553
3554 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
3555 {
3556         const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
3557         const u8 ipv6_multicast[3] = { 0x33, 0x33 };
3558         const u8 arp_type[2] = { 0x08, 0x06 };
3559         int mask_index;
3560         u32 sopass;
3561         u32 pmtctl;
3562         u32 wucsr;
3563         u32 macrx;
3564         u16 crc;
3565
3566         for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
3567                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
3568
3569         /* clear wake settings */
3570         pmtctl = lan743x_csr_read(adapter, PMT_CTL);
3571         pmtctl |= PMT_CTL_WUPS_MASK_;
3572         pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
3573                 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
3574                 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
3575
3576         macrx = lan743x_csr_read(adapter, MAC_RX);
3577
3578         wucsr = 0;
3579         mask_index = 0;
3580
3581         pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
3582
3583         if (adapter->wolopts & WAKE_PHY) {
3584                 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
3585                 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
3586         }
3587         if (adapter->wolopts & WAKE_MAGIC) {
3588                 wucsr |= MAC_WUCSR_MPEN_;
3589                 macrx |= MAC_RX_RXEN_;
3590                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3591         }
3592         if (adapter->wolopts & WAKE_UCAST) {
3593                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
3594                 macrx |= MAC_RX_RXEN_;
3595                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3596                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3597         }
3598         if (adapter->wolopts & WAKE_BCAST) {
3599                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
3600                 macrx |= MAC_RX_RXEN_;
3601                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3602                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3603         }
3604         if (adapter->wolopts & WAKE_MCAST) {
3605                 /* IPv4 multicast */
3606                 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
3607                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3608                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3609                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3610                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
3611                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
3612                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3613                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3614                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3615                 mask_index++;
3616
3617                 /* IPv6 multicast */
3618                 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
3619                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3620                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3621                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3622                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
3623                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
3624                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3625                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3626                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3627                 mask_index++;
3628
3629                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3630                 macrx |= MAC_RX_RXEN_;
3631                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3632                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3633         }
3634         if (adapter->wolopts & WAKE_ARP) {
3635                 /* set MAC_WUF_CFG & WUF_MASK
3636                  * for packettype (offset 12,13) = ARP (0x0806)
3637                  */
3638                 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
3639                 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3640                                   MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
3641                                   (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3642                                   (crc & MAC_WUF_CFG_CRC16_MASK_));
3643                 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
3644                 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3645                 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3646                 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3647                 mask_index++;
3648
3649                 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3650                 macrx |= MAC_RX_RXEN_;
3651                 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3652                 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3653         }
3654
3655         if (adapter->wolopts & WAKE_MAGICSECURE) {
3656                 sopass = *(u32 *)adapter->sopass;
3657                 lan743x_csr_write(adapter, MAC_MP_SO_LO, sopass);
3658                 sopass = *(u16 *)&adapter->sopass[4];
3659                 lan743x_csr_write(adapter, MAC_MP_SO_HI, sopass);
3660                 wucsr |= MAC_MP_SO_EN_;
3661         }
3662
3663         lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3664         lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3665         lan743x_csr_write(adapter, MAC_RX, macrx);
3666 }
3667
3668 static int lan743x_pm_suspend(struct device *dev)
3669 {
3670         struct pci_dev *pdev = to_pci_dev(dev);
3671         struct net_device *netdev = pci_get_drvdata(pdev);
3672         struct lan743x_adapter *adapter = netdev_priv(netdev);
3673         u32 data;
3674
3675         lan743x_pcidev_shutdown(pdev);
3676
3677         /* clear all wakes */
3678         lan743x_csr_write(adapter, MAC_WUCSR, 0);
3679         lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3680         lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3681
3682         if (adapter->wolopts)
3683                 lan743x_pm_set_wol(adapter);
3684
3685         if (adapter->is_pci11x1x) {
3686                 /* Save HW_CFG to config again in PM resume */
3687                 data = lan743x_csr_read(adapter, HW_CFG);
3688                 adapter->hw_cfg = data;
3689                 data |= (HW_CFG_RST_PROTECT_PCIE_ |
3690                          HW_CFG_D3_RESET_DIS_ |
3691                          HW_CFG_D3_VAUX_OVR_ |
3692                          HW_CFG_HOT_RESET_DIS_ |
3693                          HW_CFG_RST_PROTECT_);
3694                 lan743x_csr_write(adapter, HW_CFG, data);
3695         }
3696
3697         /* Host sets PME_En, put D3hot */
3698         return pci_prepare_to_sleep(pdev);
3699 }
3700
3701 static int lan743x_pm_resume(struct device *dev)
3702 {
3703         struct pci_dev *pdev = to_pci_dev(dev);
3704         struct net_device *netdev = pci_get_drvdata(pdev);
3705         struct lan743x_adapter *adapter = netdev_priv(netdev);
3706         int ret;
3707
3708         pci_set_power_state(pdev, PCI_D0);
3709         pci_restore_state(pdev);
3710         pci_save_state(pdev);
3711
3712         /* Restore HW_CFG that was saved during pm suspend */
3713         if (adapter->is_pci11x1x)
3714                 lan743x_csr_write(adapter, HW_CFG, adapter->hw_cfg);
3715
3716         ret = lan743x_hardware_init(adapter, pdev);
3717         if (ret) {
3718                 netif_err(adapter, probe, adapter->netdev,
3719                           "lan743x_hardware_init returned %d\n", ret);
3720                 lan743x_pci_cleanup(adapter);
3721                 return ret;
3722         }
3723
3724         /* open netdev when netdev is at running state while resume.
3725          * For instance, it is true when system wakesup after pm-suspend
3726          * However, it is false when system wakes up after suspend GUI menu
3727          */
3728         if (netif_running(netdev))
3729                 lan743x_netdev_open(netdev);
3730
3731         netif_device_attach(netdev);
3732         ret = lan743x_csr_read(adapter, MAC_WK_SRC);
3733         netif_info(adapter, drv, adapter->netdev,
3734                    "Wakeup source : 0x%08X\n", ret);
3735
3736         return 0;
3737 }
3738
3739 static const struct dev_pm_ops lan743x_pm_ops = {
3740         SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3741 };
3742 #endif /* CONFIG_PM_SLEEP */
3743
3744 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3745         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3746         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3747         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_A011) },
3748         { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_A041) },
3749         { 0, }
3750 };
3751
3752 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3753
3754 static struct pci_driver lan743x_pcidev_driver = {
3755         .name     = DRIVER_NAME,
3756         .id_table = lan743x_pcidev_tbl,
3757         .probe    = lan743x_pcidev_probe,
3758         .remove   = lan743x_pcidev_remove,
3759 #ifdef CONFIG_PM_SLEEP
3760         .driver.pm = &lan743x_pm_ops,
3761 #endif
3762         .shutdown = lan743x_pcidev_shutdown,
3763 };
3764
3765 module_pci_driver(lan743x_pcidev_driver);
3766
3767 MODULE_AUTHOR(DRIVER_AUTHOR);
3768 MODULE_DESCRIPTION(DRIVER_DESC);
3769 MODULE_LICENSE("GPL");