1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* Copyright (C) 2018 Microchip Technology Inc. */ 3 4 #include <linux/module.h> 5 #include <linux/pci.h> 6 #include <linux/netdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/crc32.h> 9 #include <linux/microchipphy.h> 10 #include <linux/net_tstamp.h> 11 #include <linux/phy.h> 12 #include <linux/rtnetlink.h> 13 #include <linux/iopoll.h> 14 #include <linux/crc16.h> 15 #include "lan743x_main.h" 16 #include "lan743x_ethtool.h" 17 18 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter) 19 { 20 pci_release_selected_regions(adapter->pdev, 21 pci_select_bars(adapter->pdev, 22 IORESOURCE_MEM)); 23 pci_disable_device(adapter->pdev); 24 } 25 26 static int lan743x_pci_init(struct lan743x_adapter *adapter, 27 struct pci_dev *pdev) 28 { 29 unsigned long bars = 0; 30 int ret; 31 32 adapter->pdev = pdev; 33 ret = pci_enable_device_mem(pdev); 34 if (ret) 35 goto return_error; 36 37 netif_info(adapter, probe, adapter->netdev, 38 "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n", 39 pdev->vendor, pdev->device); 40 bars = pci_select_bars(pdev, IORESOURCE_MEM); 41 if (!test_bit(0, &bars)) 42 goto disable_device; 43 44 ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME); 45 if (ret) 46 goto disable_device; 47 48 pci_set_master(pdev); 49 return 0; 50 51 disable_device: 52 pci_disable_device(adapter->pdev); 53 54 return_error: 55 return ret; 56 } 57 58 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset) 59 { 60 return ioread32(&adapter->csr.csr_address[offset]); 61 } 62 63 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset, 64 u32 data) 65 { 66 iowrite32(data, &adapter->csr.csr_address[offset]); 67 } 68 69 #define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset) 70 71 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter) 72 { 73 u32 data; 74 75 data = lan743x_csr_read(adapter, HW_CFG); 76 data |= HW_CFG_LRST_; 77 lan743x_csr_write(adapter, HW_CFG, data); 78 79 return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data, 80 !(data & HW_CFG_LRST_), 100000, 10000000); 81 } 82 83 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter, 84 int offset, u32 bit_mask, 85 int target_value, int usleep_min, 86 int usleep_max, int count) 87 { 88 u32 data; 89 90 return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data, 91 target_value == ((data & bit_mask) ? 1 : 0), 92 usleep_max, usleep_min * count); 93 } 94 95 static int lan743x_csr_init(struct lan743x_adapter *adapter) 96 { 97 struct lan743x_csr *csr = &adapter->csr; 98 resource_size_t bar_start, bar_length; 99 int result; 100 101 bar_start = pci_resource_start(adapter->pdev, 0); 102 bar_length = pci_resource_len(adapter->pdev, 0); 103 csr->csr_address = devm_ioremap(&adapter->pdev->dev, 104 bar_start, bar_length); 105 if (!csr->csr_address) { 106 result = -ENOMEM; 107 goto clean_up; 108 } 109 110 csr->id_rev = lan743x_csr_read(adapter, ID_REV); 111 csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV); 112 netif_info(adapter, probe, adapter->netdev, 113 "ID_REV = 0x%08X, FPGA_REV = %d.%d\n", 114 csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev), 115 FPGA_REV_GET_MINOR_(csr->fpga_rev)); 116 if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) { 117 result = -ENODEV; 118 goto clean_up; 119 } 120 121 csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR; 122 switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) { 123 case ID_REV_CHIP_REV_A0_: 124 csr->flags |= LAN743X_CSR_FLAG_IS_A0; 125 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR; 126 break; 127 case ID_REV_CHIP_REV_B0_: 128 csr->flags |= LAN743X_CSR_FLAG_IS_B0; 129 break; 130 } 131 132 result = lan743x_csr_light_reset(adapter); 133 if (result) 134 goto clean_up; 135 return 0; 136 clean_up: 137 return result; 138 } 139 140 static void lan743x_intr_software_isr(void *context) 141 { 142 struct lan743x_adapter *adapter = context; 143 struct lan743x_intr *intr = &adapter->intr; 144 u32 int_sts; 145 146 int_sts = lan743x_csr_read(adapter, INT_STS); 147 if (int_sts & INT_BIT_SW_GP_) { 148 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_); 149 intr->software_isr_flag = 1; 150 } 151 } 152 153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags) 154 { 155 struct lan743x_tx *tx = context; 156 struct lan743x_adapter *adapter = tx->adapter; 157 bool enable_flag = true; 158 u32 int_en = 0; 159 160 int_en = lan743x_csr_read(adapter, INT_EN_SET); 161 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) { 162 lan743x_csr_write(adapter, INT_EN_CLR, 163 INT_BIT_DMA_TX_(tx->channel_number)); 164 } 165 166 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) { 167 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number); 168 u32 dmac_int_sts; 169 u32 dmac_int_en; 170 171 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) 172 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS); 173 else 174 dmac_int_sts = ioc_bit; 175 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) 176 dmac_int_en = lan743x_csr_read(adapter, 177 DMAC_INT_EN_SET); 178 else 179 dmac_int_en = ioc_bit; 180 181 dmac_int_en &= ioc_bit; 182 dmac_int_sts &= dmac_int_en; 183 if (dmac_int_sts & ioc_bit) { 184 napi_schedule(&tx->napi); 185 enable_flag = false;/* poll func will enable later */ 186 } 187 } 188 189 if (enable_flag) 190 /* enable isr */ 191 lan743x_csr_write(adapter, INT_EN_SET, 192 INT_BIT_DMA_TX_(tx->channel_number)); 193 } 194 195 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags) 196 { 197 struct lan743x_rx *rx = context; 198 struct lan743x_adapter *adapter = rx->adapter; 199 bool enable_flag = true; 200 201 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) { 202 lan743x_csr_write(adapter, INT_EN_CLR, 203 INT_BIT_DMA_RX_(rx->channel_number)); 204 } 205 206 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) { 207 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number); 208 u32 dmac_int_sts; 209 u32 dmac_int_en; 210 211 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) 212 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS); 213 else 214 dmac_int_sts = rx_frame_bit; 215 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) 216 dmac_int_en = lan743x_csr_read(adapter, 217 DMAC_INT_EN_SET); 218 else 219 dmac_int_en = rx_frame_bit; 220 221 dmac_int_en &= rx_frame_bit; 222 dmac_int_sts &= dmac_int_en; 223 if (dmac_int_sts & rx_frame_bit) { 224 napi_schedule(&rx->napi); 225 enable_flag = false;/* poll funct will enable later */ 226 } 227 } 228 229 if (enable_flag) { 230 /* enable isr */ 231 lan743x_csr_write(adapter, INT_EN_SET, 232 INT_BIT_DMA_RX_(rx->channel_number)); 233 } 234 } 235 236 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags) 237 { 238 struct lan743x_adapter *adapter = context; 239 unsigned int channel; 240 241 if (int_sts & INT_BIT_ALL_RX_) { 242 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS; 243 channel++) { 244 u32 int_bit = INT_BIT_DMA_RX_(channel); 245 246 if (int_sts & int_bit) { 247 lan743x_rx_isr(&adapter->rx[channel], 248 int_bit, flags); 249 int_sts &= ~int_bit; 250 } 251 } 252 } 253 if (int_sts & INT_BIT_ALL_TX_) { 254 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS; 255 channel++) { 256 u32 int_bit = INT_BIT_DMA_TX_(channel); 257 258 if (int_sts & int_bit) { 259 lan743x_tx_isr(&adapter->tx[channel], 260 int_bit, flags); 261 int_sts &= ~int_bit; 262 } 263 } 264 } 265 if (int_sts & INT_BIT_ALL_OTHER_) { 266 if (int_sts & INT_BIT_SW_GP_) { 267 lan743x_intr_software_isr(adapter); 268 int_sts &= ~INT_BIT_SW_GP_; 269 } 270 if (int_sts & INT_BIT_1588_) { 271 lan743x_ptp_isr(adapter); 272 int_sts &= ~INT_BIT_1588_; 273 } 274 } 275 if (int_sts) 276 lan743x_csr_write(adapter, INT_EN_CLR, int_sts); 277 } 278 279 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr) 280 { 281 struct lan743x_vector *vector = ptr; 282 struct lan743x_adapter *adapter = vector->adapter; 283 irqreturn_t result = IRQ_NONE; 284 u32 int_enables; 285 u32 int_sts; 286 287 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) { 288 int_sts = lan743x_csr_read(adapter, INT_STS); 289 } else if (vector->flags & 290 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C | 291 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) { 292 int_sts = lan743x_csr_read(adapter, INT_STS_R2C); 293 } else { 294 /* use mask as implied status */ 295 int_sts = vector->int_mask | INT_BIT_MAS_; 296 } 297 298 if (!(int_sts & INT_BIT_MAS_)) 299 goto irq_done; 300 301 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR) 302 /* disable vector interrupt */ 303 lan743x_csr_write(adapter, 304 INT_VEC_EN_CLR, 305 INT_VEC_EN_(vector->vector_index)); 306 307 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR) 308 /* disable master interrupt */ 309 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_); 310 311 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) { 312 int_enables = lan743x_csr_read(adapter, INT_EN_SET); 313 } else { 314 /* use vector mask as implied enable mask */ 315 int_enables = vector->int_mask; 316 } 317 318 int_sts &= int_enables; 319 int_sts &= vector->int_mask; 320 if (int_sts) { 321 if (vector->handler) { 322 vector->handler(vector->context, 323 int_sts, vector->flags); 324 } else { 325 /* disable interrupts on this vector */ 326 lan743x_csr_write(adapter, INT_EN_CLR, 327 vector->int_mask); 328 } 329 result = IRQ_HANDLED; 330 } 331 332 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET) 333 /* enable master interrupt */ 334 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_); 335 336 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET) 337 /* enable vector interrupt */ 338 lan743x_csr_write(adapter, 339 INT_VEC_EN_SET, 340 INT_VEC_EN_(vector->vector_index)); 341 irq_done: 342 return result; 343 } 344 345 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter) 346 { 347 struct lan743x_intr *intr = &adapter->intr; 348 int result = -ENODEV; 349 int timeout = 10; 350 351 intr->software_isr_flag = 0; 352 353 /* enable interrupt */ 354 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_); 355 356 /* activate interrupt here */ 357 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_); 358 while ((timeout > 0) && (!(intr->software_isr_flag))) { 359 usleep_range(1000, 20000); 360 timeout--; 361 } 362 363 if (intr->software_isr_flag) 364 result = 0; 365 366 /* disable interrupts */ 367 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_); 368 return result; 369 } 370 371 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter, 372 int vector_index, u32 flags, 373 u32 int_mask, 374 lan743x_vector_handler handler, 375 void *context) 376 { 377 struct lan743x_vector *vector = &adapter->intr.vector_list 378 [vector_index]; 379 int ret; 380 381 vector->adapter = adapter; 382 vector->flags = flags; 383 vector->vector_index = vector_index; 384 vector->int_mask = int_mask; 385 vector->handler = handler; 386 vector->context = context; 387 388 ret = request_irq(vector->irq, 389 lan743x_intr_entry_isr, 390 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ? 391 IRQF_SHARED : 0, DRIVER_NAME, vector); 392 if (ret) { 393 vector->handler = NULL; 394 vector->context = NULL; 395 vector->int_mask = 0; 396 vector->flags = 0; 397 } 398 return ret; 399 } 400 401 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter, 402 int vector_index) 403 { 404 struct lan743x_vector *vector = &adapter->intr.vector_list 405 [vector_index]; 406 407 free_irq(vector->irq, vector); 408 vector->handler = NULL; 409 vector->context = NULL; 410 vector->int_mask = 0; 411 vector->flags = 0; 412 } 413 414 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter, 415 u32 int_mask) 416 { 417 int index; 418 419 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) { 420 if (adapter->intr.vector_list[index].int_mask & int_mask) 421 return adapter->intr.vector_list[index].flags; 422 } 423 return 0; 424 } 425 426 static void lan743x_intr_close(struct lan743x_adapter *adapter) 427 { 428 struct lan743x_intr *intr = &adapter->intr; 429 int index = 0; 430 431 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_); 432 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF); 433 434 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) { 435 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) { 436 lan743x_intr_unregister_isr(adapter, index); 437 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index); 438 } 439 } 440 441 if (intr->flags & INTR_FLAG_MSI_ENABLED) { 442 pci_disable_msi(adapter->pdev); 443 intr->flags &= ~INTR_FLAG_MSI_ENABLED; 444 } 445 446 if (intr->flags & INTR_FLAG_MSIX_ENABLED) { 447 pci_disable_msix(adapter->pdev); 448 intr->flags &= ~INTR_FLAG_MSIX_ENABLED; 449 } 450 } 451 452 static int lan743x_intr_open(struct lan743x_adapter *adapter) 453 { 454 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT]; 455 struct lan743x_intr *intr = &adapter->intr; 456 u32 int_vec_en_auto_clr = 0; 457 u32 int_vec_map0 = 0; 458 u32 int_vec_map1 = 0; 459 int ret = -ENODEV; 460 int index = 0; 461 u32 flags = 0; 462 463 intr->number_of_vectors = 0; 464 465 /* Try to set up MSIX interrupts */ 466 memset(&msix_entries[0], 0, 467 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT); 468 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) 469 msix_entries[index].entry = index; 470 ret = pci_enable_msix_range(adapter->pdev, 471 msix_entries, 1, 472 1 + LAN743X_USED_TX_CHANNELS + 473 LAN743X_USED_RX_CHANNELS); 474 475 if (ret > 0) { 476 intr->flags |= INTR_FLAG_MSIX_ENABLED; 477 intr->number_of_vectors = ret; 478 intr->using_vectors = true; 479 for (index = 0; index < intr->number_of_vectors; index++) 480 intr->vector_list[index].irq = msix_entries 481 [index].vector; 482 netif_info(adapter, ifup, adapter->netdev, 483 "using MSIX interrupts, number of vectors = %d\n", 484 intr->number_of_vectors); 485 } 486 487 /* If MSIX failed try to setup using MSI interrupts */ 488 if (!intr->number_of_vectors) { 489 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 490 if (!pci_enable_msi(adapter->pdev)) { 491 intr->flags |= INTR_FLAG_MSI_ENABLED; 492 intr->number_of_vectors = 1; 493 intr->using_vectors = true; 494 intr->vector_list[0].irq = 495 adapter->pdev->irq; 496 netif_info(adapter, ifup, adapter->netdev, 497 "using MSI interrupts, number of vectors = %d\n", 498 intr->number_of_vectors); 499 } 500 } 501 } 502 503 /* If MSIX, and MSI failed, setup using legacy interrupt */ 504 if (!intr->number_of_vectors) { 505 intr->number_of_vectors = 1; 506 intr->using_vectors = false; 507 intr->vector_list[0].irq = intr->irq; 508 netif_info(adapter, ifup, adapter->netdev, 509 "using legacy interrupts\n"); 510 } 511 512 /* At this point we must have at least one irq */ 513 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF); 514 515 /* map all interrupts to vector 0 */ 516 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000); 517 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000); 518 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000); 519 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ | 520 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C | 521 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK | 522 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR; 523 524 if (intr->using_vectors) { 525 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR | 526 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET; 527 } else { 528 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR | 529 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET | 530 LAN743X_VECTOR_FLAG_IRQ_SHARED; 531 } 532 533 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) { 534 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ; 535 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C; 536 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR; 537 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK; 538 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C; 539 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C; 540 } 541 542 ret = lan743x_intr_register_isr(adapter, 0, flags, 543 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ | 544 INT_BIT_ALL_OTHER_, 545 lan743x_intr_shared_isr, adapter); 546 if (ret) 547 goto clean_up; 548 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0); 549 550 if (intr->using_vectors) 551 lan743x_csr_write(adapter, INT_VEC_EN_SET, 552 INT_VEC_EN_(0)); 553 554 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 555 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD); 556 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD); 557 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD); 558 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD); 559 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD); 560 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD); 561 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD); 562 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD); 563 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432); 564 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001); 565 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF); 566 } 567 568 /* enable interrupts */ 569 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_); 570 ret = lan743x_intr_test_isr(adapter); 571 if (ret) 572 goto clean_up; 573 574 if (intr->number_of_vectors > 1) { 575 int number_of_tx_vectors = intr->number_of_vectors - 1; 576 577 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS) 578 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS; 579 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ | 580 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C | 581 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK | 582 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR | 583 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR | 584 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET; 585 586 if (adapter->csr.flags & 587 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) { 588 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET | 589 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET | 590 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR | 591 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR; 592 } 593 594 for (index = 0; index < number_of_tx_vectors; index++) { 595 u32 int_bit = INT_BIT_DMA_TX_(index); 596 int vector = index + 1; 597 598 /* map TX interrupt to vector */ 599 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector); 600 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1); 601 602 /* Remove TX interrupt from shared mask */ 603 intr->vector_list[0].int_mask &= ~int_bit; 604 ret = lan743x_intr_register_isr(adapter, vector, flags, 605 int_bit, lan743x_tx_isr, 606 &adapter->tx[index]); 607 if (ret) 608 goto clean_up; 609 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector); 610 if (!(flags & 611 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)) 612 lan743x_csr_write(adapter, INT_VEC_EN_SET, 613 INT_VEC_EN_(vector)); 614 } 615 } 616 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) { 617 int number_of_rx_vectors = intr->number_of_vectors - 618 LAN743X_USED_TX_CHANNELS - 1; 619 620 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS) 621 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS; 622 623 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ | 624 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C | 625 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK | 626 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR | 627 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR | 628 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET; 629 630 if (adapter->csr.flags & 631 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) { 632 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR | 633 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET | 634 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET | 635 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR | 636 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR; 637 } 638 for (index = 0; index < number_of_rx_vectors; index++) { 639 int vector = index + 1 + LAN743X_USED_TX_CHANNELS; 640 u32 int_bit = INT_BIT_DMA_RX_(index); 641 642 /* map RX interrupt to vector */ 643 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector); 644 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0); 645 if (flags & 646 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) { 647 int_vec_en_auto_clr |= INT_VEC_EN_(vector); 648 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR, 649 int_vec_en_auto_clr); 650 } 651 652 /* Remove RX interrupt from shared mask */ 653 intr->vector_list[0].int_mask &= ~int_bit; 654 ret = lan743x_intr_register_isr(adapter, vector, flags, 655 int_bit, lan743x_rx_isr, 656 &adapter->rx[index]); 657 if (ret) 658 goto clean_up; 659 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector); 660 661 lan743x_csr_write(adapter, INT_VEC_EN_SET, 662 INT_VEC_EN_(vector)); 663 } 664 } 665 return 0; 666 667 clean_up: 668 lan743x_intr_close(adapter); 669 return ret; 670 } 671 672 static int lan743x_dp_write(struct lan743x_adapter *adapter, 673 u32 select, u32 addr, u32 length, u32 *buf) 674 { 675 int ret = -EIO; 676 u32 dp_sel; 677 int i; 678 679 mutex_lock(&adapter->dp_lock); 680 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_, 681 1, 40, 100, 100)) 682 goto unlock; 683 dp_sel = lan743x_csr_read(adapter, DP_SEL); 684 dp_sel &= ~DP_SEL_MASK_; 685 dp_sel |= select; 686 lan743x_csr_write(adapter, DP_SEL, dp_sel); 687 688 for (i = 0; i < length; i++) { 689 lan743x_csr_write(adapter, DP_ADDR, addr + i); 690 lan743x_csr_write(adapter, DP_DATA_0, buf[i]); 691 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_); 692 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_, 693 1, 40, 100, 100)) 694 goto unlock; 695 } 696 ret = 0; 697 698 unlock: 699 mutex_unlock(&adapter->dp_lock); 700 return ret; 701 } 702 703 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read) 704 { 705 u32 ret; 706 707 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) & 708 MAC_MII_ACC_PHY_ADDR_MASK_; 709 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) & 710 MAC_MII_ACC_MIIRINDA_MASK_; 711 712 if (read) 713 ret |= MAC_MII_ACC_MII_READ_; 714 else 715 ret |= MAC_MII_ACC_MII_WRITE_; 716 ret |= MAC_MII_ACC_MII_BUSY_; 717 718 return ret; 719 } 720 721 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter) 722 { 723 u32 data; 724 725 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data, 726 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000); 727 } 728 729 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index) 730 { 731 struct lan743x_adapter *adapter = bus->priv; 732 u32 val, mii_access; 733 int ret; 734 735 /* comfirm MII not busy */ 736 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 737 if (ret < 0) 738 return ret; 739 740 /* set the address, index & direction (read from PHY) */ 741 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ); 742 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access); 743 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 744 if (ret < 0) 745 return ret; 746 747 val = lan743x_csr_read(adapter, MAC_MII_DATA); 748 return (int)(val & 0xFFFF); 749 } 750 751 static int lan743x_mdiobus_write(struct mii_bus *bus, 752 int phy_id, int index, u16 regval) 753 { 754 struct lan743x_adapter *adapter = bus->priv; 755 u32 val, mii_access; 756 int ret; 757 758 /* confirm MII not busy */ 759 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 760 if (ret < 0) 761 return ret; 762 val = (u32)regval; 763 lan743x_csr_write(adapter, MAC_MII_DATA, val); 764 765 /* set the address, index & direction (write to PHY) */ 766 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE); 767 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access); 768 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 769 return ret; 770 } 771 772 static void lan743x_mac_set_address(struct lan743x_adapter *adapter, 773 u8 *addr) 774 { 775 u32 addr_lo, addr_hi; 776 777 addr_lo = addr[0] | 778 addr[1] << 8 | 779 addr[2] << 16 | 780 addr[3] << 24; 781 addr_hi = addr[4] | 782 addr[5] << 8; 783 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo); 784 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi); 785 786 ether_addr_copy(adapter->mac_address, addr); 787 netif_info(adapter, drv, adapter->netdev, 788 "MAC address set to %pM\n", addr); 789 } 790 791 static int lan743x_mac_init(struct lan743x_adapter *adapter) 792 { 793 bool mac_address_valid = true; 794 struct net_device *netdev; 795 u32 mac_addr_hi = 0; 796 u32 mac_addr_lo = 0; 797 u32 data; 798 799 netdev = adapter->netdev; 800 801 /* setup auto duplex, and speed detection */ 802 data = lan743x_csr_read(adapter, MAC_CR); 803 data |= MAC_CR_ADD_ | MAC_CR_ASD_; 804 data |= MAC_CR_CNTR_RST_; 805 lan743x_csr_write(adapter, MAC_CR, data); 806 807 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH); 808 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL); 809 adapter->mac_address[0] = mac_addr_lo & 0xFF; 810 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF; 811 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF; 812 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF; 813 adapter->mac_address[4] = mac_addr_hi & 0xFF; 814 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF; 815 816 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) && 817 mac_addr_lo == 0xFFFFFFFF) { 818 mac_address_valid = false; 819 } else if (!is_valid_ether_addr(adapter->mac_address)) { 820 mac_address_valid = false; 821 } 822 823 if (!mac_address_valid) 824 eth_random_addr(adapter->mac_address); 825 lan743x_mac_set_address(adapter, adapter->mac_address); 826 ether_addr_copy(netdev->dev_addr, adapter->mac_address); 827 return 0; 828 } 829 830 static int lan743x_mac_open(struct lan743x_adapter *adapter) 831 { 832 int ret = 0; 833 u32 temp; 834 835 temp = lan743x_csr_read(adapter, MAC_RX); 836 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_); 837 temp = lan743x_csr_read(adapter, MAC_TX); 838 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_); 839 return ret; 840 } 841 842 static void lan743x_mac_close(struct lan743x_adapter *adapter) 843 { 844 u32 temp; 845 846 temp = lan743x_csr_read(adapter, MAC_TX); 847 temp &= ~MAC_TX_TXEN_; 848 lan743x_csr_write(adapter, MAC_TX, temp); 849 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_, 850 1, 1000, 20000, 100); 851 852 temp = lan743x_csr_read(adapter, MAC_RX); 853 temp &= ~MAC_RX_RXEN_; 854 lan743x_csr_write(adapter, MAC_RX, temp); 855 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_, 856 1, 1000, 20000, 100); 857 } 858 859 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter, 860 bool tx_enable, bool rx_enable) 861 { 862 u32 flow_setting = 0; 863 864 /* set maximum pause time because when fifo space frees 865 * up a zero value pause frame will be sent to release the pause 866 */ 867 flow_setting = MAC_FLOW_CR_FCPT_MASK_; 868 if (tx_enable) 869 flow_setting |= MAC_FLOW_CR_TX_FCEN_; 870 if (rx_enable) 871 flow_setting |= MAC_FLOW_CR_RX_FCEN_; 872 lan743x_csr_write(adapter, MAC_FLOW, flow_setting); 873 } 874 875 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu) 876 { 877 int enabled = 0; 878 u32 mac_rx = 0; 879 880 mac_rx = lan743x_csr_read(adapter, MAC_RX); 881 if (mac_rx & MAC_RX_RXEN_) { 882 enabled = 1; 883 if (mac_rx & MAC_RX_RXD_) { 884 lan743x_csr_write(adapter, MAC_RX, mac_rx); 885 mac_rx &= ~MAC_RX_RXD_; 886 } 887 mac_rx &= ~MAC_RX_RXEN_; 888 lan743x_csr_write(adapter, MAC_RX, mac_rx); 889 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_, 890 1, 1000, 20000, 100); 891 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_); 892 } 893 894 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_); 895 mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) & 896 MAC_RX_MAX_SIZE_MASK_); 897 lan743x_csr_write(adapter, MAC_RX, mac_rx); 898 899 if (enabled) { 900 mac_rx |= MAC_RX_RXEN_; 901 lan743x_csr_write(adapter, MAC_RX, mac_rx); 902 } 903 return 0; 904 } 905 906 /* PHY */ 907 static int lan743x_phy_reset(struct lan743x_adapter *adapter) 908 { 909 u32 data; 910 911 /* Only called with in probe, and before mdiobus_register */ 912 913 data = lan743x_csr_read(adapter, PMT_CTL); 914 data |= PMT_CTL_ETH_PHY_RST_; 915 lan743x_csr_write(adapter, PMT_CTL, data); 916 917 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data, 918 (!(data & PMT_CTL_ETH_PHY_RST_) && 919 (data & PMT_CTL_READY_)), 920 50000, 1000000); 921 } 922 923 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter, 924 u8 duplex, u16 local_adv, 925 u16 remote_adv) 926 { 927 struct lan743x_phy *phy = &adapter->phy; 928 u8 cap; 929 930 if (phy->fc_autoneg) 931 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv); 932 else 933 cap = phy->fc_request_control; 934 935 lan743x_mac_flow_ctrl_set_enables(adapter, 936 cap & FLOW_CTRL_TX, 937 cap & FLOW_CTRL_RX); 938 } 939 940 static int lan743x_phy_init(struct lan743x_adapter *adapter) 941 { 942 return lan743x_phy_reset(adapter); 943 } 944 945 static void lan743x_phy_link_status_change(struct net_device *netdev) 946 { 947 struct lan743x_adapter *adapter = netdev_priv(netdev); 948 struct phy_device *phydev = netdev->phydev; 949 950 phy_print_status(phydev); 951 if (phydev->state == PHY_RUNNING) { 952 struct ethtool_link_ksettings ksettings; 953 int remote_advertisement = 0; 954 int local_advertisement = 0; 955 956 memset(&ksettings, 0, sizeof(ksettings)); 957 phy_ethtool_get_link_ksettings(netdev, &ksettings); 958 local_advertisement = 959 linkmode_adv_to_mii_adv_t(phydev->advertising); 960 remote_advertisement = 961 linkmode_adv_to_mii_adv_t(phydev->lp_advertising); 962 963 lan743x_phy_update_flowcontrol(adapter, 964 ksettings.base.duplex, 965 local_advertisement, 966 remote_advertisement); 967 lan743x_ptp_update_latency(adapter, ksettings.base.speed); 968 } 969 } 970 971 static void lan743x_phy_close(struct lan743x_adapter *adapter) 972 { 973 struct net_device *netdev = adapter->netdev; 974 975 phy_stop(netdev->phydev); 976 phy_disconnect(netdev->phydev); 977 netdev->phydev = NULL; 978 } 979 980 static int lan743x_phy_open(struct lan743x_adapter *adapter) 981 { 982 struct lan743x_phy *phy = &adapter->phy; 983 struct phy_device *phydev; 984 struct net_device *netdev; 985 int ret = -EIO; 986 987 netdev = adapter->netdev; 988 phydev = phy_find_first(adapter->mdiobus); 989 if (!phydev) 990 goto return_error; 991 992 ret = phy_connect_direct(netdev, phydev, 993 lan743x_phy_link_status_change, 994 PHY_INTERFACE_MODE_GMII); 995 if (ret) 996 goto return_error; 997 998 /* MAC doesn't support 1000T Half */ 999 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); 1000 1001 /* support both flow controls */ 1002 phy_support_asym_pause(phydev); 1003 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX); 1004 phy->fc_autoneg = phydev->autoneg; 1005 1006 phy_start(phydev); 1007 phy_start_aneg(phydev); 1008 return 0; 1009 1010 return_error: 1011 return ret; 1012 } 1013 1014 static void lan743x_rfe_open(struct lan743x_adapter *adapter) 1015 { 1016 lan743x_csr_write(adapter, RFE_RSS_CFG, 1017 RFE_RSS_CFG_UDP_IPV6_EX_ | 1018 RFE_RSS_CFG_TCP_IPV6_EX_ | 1019 RFE_RSS_CFG_IPV6_EX_ | 1020 RFE_RSS_CFG_UDP_IPV6_ | 1021 RFE_RSS_CFG_TCP_IPV6_ | 1022 RFE_RSS_CFG_IPV6_ | 1023 RFE_RSS_CFG_UDP_IPV4_ | 1024 RFE_RSS_CFG_TCP_IPV4_ | 1025 RFE_RSS_CFG_IPV4_ | 1026 RFE_RSS_CFG_VALID_HASH_BITS_ | 1027 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ | 1028 RFE_RSS_CFG_RSS_HASH_STORE_ | 1029 RFE_RSS_CFG_RSS_ENABLE_); 1030 } 1031 1032 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter) 1033 { 1034 u8 *mac_addr; 1035 u32 mac_addr_hi = 0; 1036 u32 mac_addr_lo = 0; 1037 1038 /* Add mac address to perfect Filter */ 1039 mac_addr = adapter->mac_address; 1040 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) | 1041 (((u32)(mac_addr[1])) << 8) | 1042 (((u32)(mac_addr[2])) << 16) | 1043 (((u32)(mac_addr[3])) << 24)); 1044 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) | 1045 (((u32)(mac_addr[5])) << 8)); 1046 1047 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo); 1048 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0), 1049 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_); 1050 } 1051 1052 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter) 1053 { 1054 struct net_device *netdev = adapter->netdev; 1055 u32 hash_table[DP_SEL_VHF_HASH_LEN]; 1056 u32 rfctl; 1057 u32 data; 1058 1059 rfctl = lan743x_csr_read(adapter, RFE_CTL); 1060 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ | 1061 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_); 1062 rfctl |= RFE_CTL_AB_; 1063 if (netdev->flags & IFF_PROMISC) { 1064 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_; 1065 } else { 1066 if (netdev->flags & IFF_ALLMULTI) 1067 rfctl |= RFE_CTL_AM_; 1068 } 1069 1070 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32)); 1071 if (netdev_mc_count(netdev)) { 1072 struct netdev_hw_addr *ha; 1073 int i; 1074 1075 rfctl |= RFE_CTL_DA_PERFECT_; 1076 i = 1; 1077 netdev_for_each_mc_addr(ha, netdev) { 1078 /* set first 32 into Perfect Filter */ 1079 if (i < 33) { 1080 lan743x_csr_write(adapter, 1081 RFE_ADDR_FILT_HI(i), 0); 1082 data = ha->addr[3]; 1083 data = ha->addr[2] | (data << 8); 1084 data = ha->addr[1] | (data << 8); 1085 data = ha->addr[0] | (data << 8); 1086 lan743x_csr_write(adapter, 1087 RFE_ADDR_FILT_LO(i), data); 1088 data = ha->addr[5]; 1089 data = ha->addr[4] | (data << 8); 1090 data |= RFE_ADDR_FILT_HI_VALID_; 1091 lan743x_csr_write(adapter, 1092 RFE_ADDR_FILT_HI(i), data); 1093 } else { 1094 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >> 1095 23) & 0x1FF; 1096 hash_table[bitnum / 32] |= (1 << (bitnum % 32)); 1097 rfctl |= RFE_CTL_MCAST_HASH_; 1098 } 1099 i++; 1100 } 1101 } 1102 1103 lan743x_dp_write(adapter, DP_SEL_RFE_RAM, 1104 DP_SEL_VHF_VLAN_LEN, 1105 DP_SEL_VHF_HASH_LEN, hash_table); 1106 lan743x_csr_write(adapter, RFE_CTL, rfctl); 1107 } 1108 1109 static int lan743x_dmac_init(struct lan743x_adapter *adapter) 1110 { 1111 u32 data = 0; 1112 1113 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_); 1114 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_, 1115 0, 1000, 20000, 100); 1116 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) { 1117 case DMA_DESCRIPTOR_SPACING_16: 1118 data = DMAC_CFG_MAX_DSPACE_16_; 1119 break; 1120 case DMA_DESCRIPTOR_SPACING_32: 1121 data = DMAC_CFG_MAX_DSPACE_32_; 1122 break; 1123 case DMA_DESCRIPTOR_SPACING_64: 1124 data = DMAC_CFG_MAX_DSPACE_64_; 1125 break; 1126 case DMA_DESCRIPTOR_SPACING_128: 1127 data = DMAC_CFG_MAX_DSPACE_128_; 1128 break; 1129 default: 1130 return -EPERM; 1131 } 1132 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) 1133 data |= DMAC_CFG_COAL_EN_; 1134 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_; 1135 data |= DMAC_CFG_MAX_READ_REQ_SET_(6); 1136 lan743x_csr_write(adapter, DMAC_CFG, data); 1137 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1); 1138 data |= DMAC_COAL_CFG_TIMER_TX_START_; 1139 data |= DMAC_COAL_CFG_FLUSH_INTS_; 1140 data |= DMAC_COAL_CFG_INT_EXIT_COAL_; 1141 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_; 1142 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A); 1143 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C); 1144 lan743x_csr_write(adapter, DMAC_COAL_CFG, data); 1145 data = DMAC_OBFF_TX_THRES_SET_(0x08); 1146 data |= DMAC_OBFF_RX_THRES_SET_(0x0A); 1147 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data); 1148 return 0; 1149 } 1150 1151 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter, 1152 int tx_channel) 1153 { 1154 u32 dmac_cmd = 0; 1155 1156 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD); 1157 return DMAC_CHANNEL_STATE_SET((dmac_cmd & 1158 DMAC_CMD_START_T_(tx_channel)), 1159 (dmac_cmd & 1160 DMAC_CMD_STOP_T_(tx_channel))); 1161 } 1162 1163 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter, 1164 int tx_channel) 1165 { 1166 int timeout = 100; 1167 int result = 0; 1168 1169 while (timeout && 1170 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) == 1171 DMAC_CHANNEL_STATE_STOP_PENDING)) { 1172 usleep_range(1000, 20000); 1173 timeout--; 1174 } 1175 if (result == DMAC_CHANNEL_STATE_STOP_PENDING) 1176 result = -ENODEV; 1177 return result; 1178 } 1179 1180 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter, 1181 int rx_channel) 1182 { 1183 u32 dmac_cmd = 0; 1184 1185 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD); 1186 return DMAC_CHANNEL_STATE_SET((dmac_cmd & 1187 DMAC_CMD_START_R_(rx_channel)), 1188 (dmac_cmd & 1189 DMAC_CMD_STOP_R_(rx_channel))); 1190 } 1191 1192 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter, 1193 int rx_channel) 1194 { 1195 int timeout = 100; 1196 int result = 0; 1197 1198 while (timeout && 1199 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) == 1200 DMAC_CHANNEL_STATE_STOP_PENDING)) { 1201 usleep_range(1000, 20000); 1202 timeout--; 1203 } 1204 if (result == DMAC_CHANNEL_STATE_STOP_PENDING) 1205 result = -ENODEV; 1206 return result; 1207 } 1208 1209 static void lan743x_tx_release_desc(struct lan743x_tx *tx, 1210 int descriptor_index, bool cleanup) 1211 { 1212 struct lan743x_tx_buffer_info *buffer_info = NULL; 1213 struct lan743x_tx_descriptor *descriptor = NULL; 1214 u32 descriptor_type = 0; 1215 bool ignore_sync; 1216 1217 descriptor = &tx->ring_cpu_ptr[descriptor_index]; 1218 buffer_info = &tx->buffer_info[descriptor_index]; 1219 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE)) 1220 goto done; 1221 1222 descriptor_type = (descriptor->data0) & 1223 TX_DESC_DATA0_DTYPE_MASK_; 1224 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_) 1225 goto clean_up_data_descriptor; 1226 else 1227 goto clear_active; 1228 1229 clean_up_data_descriptor: 1230 if (buffer_info->dma_ptr) { 1231 if (buffer_info->flags & 1232 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) { 1233 dma_unmap_page(&tx->adapter->pdev->dev, 1234 buffer_info->dma_ptr, 1235 buffer_info->buffer_length, 1236 DMA_TO_DEVICE); 1237 } else { 1238 dma_unmap_single(&tx->adapter->pdev->dev, 1239 buffer_info->dma_ptr, 1240 buffer_info->buffer_length, 1241 DMA_TO_DEVICE); 1242 } 1243 buffer_info->dma_ptr = 0; 1244 buffer_info->buffer_length = 0; 1245 } 1246 if (!buffer_info->skb) 1247 goto clear_active; 1248 1249 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) { 1250 dev_kfree_skb(buffer_info->skb); 1251 goto clear_skb; 1252 } 1253 1254 if (cleanup) { 1255 lan743x_ptp_unrequest_tx_timestamp(tx->adapter); 1256 dev_kfree_skb(buffer_info->skb); 1257 } else { 1258 ignore_sync = (buffer_info->flags & 1259 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0; 1260 lan743x_ptp_tx_timestamp_skb(tx->adapter, 1261 buffer_info->skb, ignore_sync); 1262 } 1263 1264 clear_skb: 1265 buffer_info->skb = NULL; 1266 1267 clear_active: 1268 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE; 1269 1270 done: 1271 memset(buffer_info, 0, sizeof(*buffer_info)); 1272 memset(descriptor, 0, sizeof(*descriptor)); 1273 } 1274 1275 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index) 1276 { 1277 return ((++index) % tx->ring_size); 1278 } 1279 1280 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx) 1281 { 1282 while ((*tx->head_cpu_ptr) != (tx->last_head)) { 1283 lan743x_tx_release_desc(tx, tx->last_head, false); 1284 tx->last_head = lan743x_tx_next_index(tx, tx->last_head); 1285 } 1286 } 1287 1288 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx) 1289 { 1290 u32 original_head = 0; 1291 1292 original_head = tx->last_head; 1293 do { 1294 lan743x_tx_release_desc(tx, tx->last_head, true); 1295 tx->last_head = lan743x_tx_next_index(tx, tx->last_head); 1296 } while (tx->last_head != original_head); 1297 memset(tx->ring_cpu_ptr, 0, 1298 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size)); 1299 memset(tx->buffer_info, 0, 1300 sizeof(*tx->buffer_info) * (tx->ring_size)); 1301 } 1302 1303 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx, 1304 struct sk_buff *skb) 1305 { 1306 int result = 1; /* 1 for the main skb buffer */ 1307 int nr_frags = 0; 1308 1309 if (skb_is_gso(skb)) 1310 result++; /* requires an extension descriptor */ 1311 nr_frags = skb_shinfo(skb)->nr_frags; 1312 result += nr_frags; /* 1 for each fragment buffer */ 1313 return result; 1314 } 1315 1316 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx) 1317 { 1318 int last_head = tx->last_head; 1319 int last_tail = tx->last_tail; 1320 1321 if (last_tail >= last_head) 1322 return tx->ring_size - last_tail + last_head - 1; 1323 else 1324 return last_head - last_tail - 1; 1325 } 1326 1327 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx, 1328 bool enable_timestamping, 1329 bool enable_onestep_sync) 1330 { 1331 if (enable_timestamping) 1332 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED; 1333 else 1334 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED; 1335 if (enable_onestep_sync) 1336 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC; 1337 else 1338 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC; 1339 } 1340 1341 static int lan743x_tx_frame_start(struct lan743x_tx *tx, 1342 unsigned char *first_buffer, 1343 unsigned int first_buffer_length, 1344 unsigned int frame_length, 1345 bool time_stamp, 1346 bool check_sum) 1347 { 1348 /* called only from within lan743x_tx_xmit_frame. 1349 * assuming tx->ring_lock has already been acquired. 1350 */ 1351 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1352 struct lan743x_tx_buffer_info *buffer_info = NULL; 1353 struct lan743x_adapter *adapter = tx->adapter; 1354 struct device *dev = &adapter->pdev->dev; 1355 dma_addr_t dma_ptr; 1356 1357 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS; 1358 tx->frame_first = tx->last_tail; 1359 tx->frame_tail = tx->frame_first; 1360 1361 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1362 buffer_info = &tx->buffer_info[tx->frame_tail]; 1363 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length, 1364 DMA_TO_DEVICE); 1365 if (dma_mapping_error(dev, dma_ptr)) 1366 return -ENOMEM; 1367 1368 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr); 1369 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr); 1370 tx_descriptor->data3 = (frame_length << 16) & 1371 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_; 1372 1373 buffer_info->skb = NULL; 1374 buffer_info->dma_ptr = dma_ptr; 1375 buffer_info->buffer_length = first_buffer_length; 1376 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE; 1377 1378 tx->frame_data0 = (first_buffer_length & 1379 TX_DESC_DATA0_BUF_LENGTH_MASK_) | 1380 TX_DESC_DATA0_DTYPE_DATA_ | 1381 TX_DESC_DATA0_FS_ | 1382 TX_DESC_DATA0_FCS_; 1383 if (time_stamp) 1384 tx->frame_data0 |= TX_DESC_DATA0_TSE_; 1385 1386 if (check_sum) 1387 tx->frame_data0 |= TX_DESC_DATA0_ICE_ | 1388 TX_DESC_DATA0_IPE_ | 1389 TX_DESC_DATA0_TPE_; 1390 1391 /* data0 will be programmed in one of other frame assembler functions */ 1392 return 0; 1393 } 1394 1395 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx, 1396 unsigned int frame_length, 1397 int nr_frags) 1398 { 1399 /* called only from within lan743x_tx_xmit_frame. 1400 * assuming tx->ring_lock has already been acquired. 1401 */ 1402 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1403 struct lan743x_tx_buffer_info *buffer_info = NULL; 1404 1405 /* wrap up previous descriptor */ 1406 tx->frame_data0 |= TX_DESC_DATA0_EXT_; 1407 if (nr_frags <= 0) { 1408 tx->frame_data0 |= TX_DESC_DATA0_LS_; 1409 tx->frame_data0 |= TX_DESC_DATA0_IOC_; 1410 } 1411 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1412 tx_descriptor->data0 = tx->frame_data0; 1413 1414 /* move to next descriptor */ 1415 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail); 1416 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1417 buffer_info = &tx->buffer_info[tx->frame_tail]; 1418 1419 /* add extension descriptor */ 1420 tx_descriptor->data1 = 0; 1421 tx_descriptor->data2 = 0; 1422 tx_descriptor->data3 = 0; 1423 1424 buffer_info->skb = NULL; 1425 buffer_info->dma_ptr = 0; 1426 buffer_info->buffer_length = 0; 1427 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE; 1428 1429 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) | 1430 TX_DESC_DATA0_DTYPE_EXT_ | 1431 TX_DESC_DATA0_EXT_LSO_; 1432 1433 /* data0 will be programmed in one of other frame assembler functions */ 1434 } 1435 1436 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx, 1437 const struct skb_frag_struct *fragment, 1438 unsigned int frame_length) 1439 { 1440 /* called only from within lan743x_tx_xmit_frame 1441 * assuming tx->ring_lock has already been acquired 1442 */ 1443 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1444 struct lan743x_tx_buffer_info *buffer_info = NULL; 1445 struct lan743x_adapter *adapter = tx->adapter; 1446 struct device *dev = &adapter->pdev->dev; 1447 unsigned int fragment_length = 0; 1448 dma_addr_t dma_ptr; 1449 1450 fragment_length = skb_frag_size(fragment); 1451 if (!fragment_length) 1452 return 0; 1453 1454 /* wrap up previous descriptor */ 1455 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1456 tx_descriptor->data0 = tx->frame_data0; 1457 1458 /* move to next descriptor */ 1459 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail); 1460 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1461 buffer_info = &tx->buffer_info[tx->frame_tail]; 1462 dma_ptr = skb_frag_dma_map(dev, fragment, 1463 0, fragment_length, 1464 DMA_TO_DEVICE); 1465 if (dma_mapping_error(dev, dma_ptr)) { 1466 int desc_index; 1467 1468 /* cleanup all previously setup descriptors */ 1469 desc_index = tx->frame_first; 1470 while (desc_index != tx->frame_tail) { 1471 lan743x_tx_release_desc(tx, desc_index, true); 1472 desc_index = lan743x_tx_next_index(tx, desc_index); 1473 } 1474 dma_wmb(); 1475 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS; 1476 tx->frame_first = 0; 1477 tx->frame_data0 = 0; 1478 tx->frame_tail = 0; 1479 return -ENOMEM; 1480 } 1481 1482 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr); 1483 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr); 1484 tx_descriptor->data3 = (frame_length << 16) & 1485 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_; 1486 1487 buffer_info->skb = NULL; 1488 buffer_info->dma_ptr = dma_ptr; 1489 buffer_info->buffer_length = fragment_length; 1490 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE; 1491 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT; 1492 1493 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) | 1494 TX_DESC_DATA0_DTYPE_DATA_ | 1495 TX_DESC_DATA0_FCS_; 1496 1497 /* data0 will be programmed in one of other frame assembler functions */ 1498 return 0; 1499 } 1500 1501 static void lan743x_tx_frame_end(struct lan743x_tx *tx, 1502 struct sk_buff *skb, 1503 bool time_stamp, 1504 bool ignore_sync) 1505 { 1506 /* called only from within lan743x_tx_xmit_frame 1507 * assuming tx->ring_lock has already been acquired 1508 */ 1509 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1510 struct lan743x_tx_buffer_info *buffer_info = NULL; 1511 struct lan743x_adapter *adapter = tx->adapter; 1512 u32 tx_tail_flags = 0; 1513 1514 /* wrap up previous descriptor */ 1515 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) == 1516 TX_DESC_DATA0_DTYPE_DATA_) { 1517 tx->frame_data0 |= TX_DESC_DATA0_LS_; 1518 tx->frame_data0 |= TX_DESC_DATA0_IOC_; 1519 } 1520 1521 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1522 buffer_info = &tx->buffer_info[tx->frame_tail]; 1523 buffer_info->skb = skb; 1524 if (time_stamp) 1525 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED; 1526 if (ignore_sync) 1527 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC; 1528 1529 tx_descriptor->data0 = tx->frame_data0; 1530 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail); 1531 tx->last_tail = tx->frame_tail; 1532 1533 dma_wmb(); 1534 1535 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET) 1536 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_; 1537 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) 1538 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ | 1539 TX_TAIL_SET_TOP_INT_EN_; 1540 1541 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number), 1542 tx_tail_flags | tx->frame_tail); 1543 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS; 1544 } 1545 1546 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx, 1547 struct sk_buff *skb) 1548 { 1549 int required_number_of_descriptors = 0; 1550 unsigned int start_frame_length = 0; 1551 unsigned int frame_length = 0; 1552 unsigned int head_length = 0; 1553 unsigned long irq_flags = 0; 1554 bool do_timestamp = false; 1555 bool ignore_sync = false; 1556 int nr_frags = 0; 1557 bool gso = false; 1558 int j; 1559 1560 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb); 1561 1562 spin_lock_irqsave(&tx->ring_lock, irq_flags); 1563 if (required_number_of_descriptors > 1564 lan743x_tx_get_avail_desc(tx)) { 1565 if (required_number_of_descriptors > (tx->ring_size - 1)) { 1566 dev_kfree_skb(skb); 1567 } else { 1568 /* save to overflow buffer */ 1569 tx->overflow_skb = skb; 1570 netif_stop_queue(tx->adapter->netdev); 1571 } 1572 goto unlock; 1573 } 1574 1575 /* space available, transmit skb */ 1576 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 1577 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) && 1578 (lan743x_ptp_request_tx_timestamp(tx->adapter))) { 1579 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 1580 do_timestamp = true; 1581 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC) 1582 ignore_sync = true; 1583 } 1584 head_length = skb_headlen(skb); 1585 frame_length = skb_pagelen(skb); 1586 nr_frags = skb_shinfo(skb)->nr_frags; 1587 start_frame_length = frame_length; 1588 gso = skb_is_gso(skb); 1589 if (gso) { 1590 start_frame_length = max(skb_shinfo(skb)->gso_size, 1591 (unsigned short)8); 1592 } 1593 1594 if (lan743x_tx_frame_start(tx, 1595 skb->data, head_length, 1596 start_frame_length, 1597 do_timestamp, 1598 skb->ip_summed == CHECKSUM_PARTIAL)) { 1599 dev_kfree_skb(skb); 1600 goto unlock; 1601 } 1602 1603 if (gso) 1604 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags); 1605 1606 if (nr_frags <= 0) 1607 goto finish; 1608 1609 for (j = 0; j < nr_frags; j++) { 1610 const struct skb_frag_struct *frag; 1611 1612 frag = &(skb_shinfo(skb)->frags[j]); 1613 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) { 1614 /* upon error no need to call 1615 * lan743x_tx_frame_end 1616 * frame assembler clean up was performed inside 1617 * lan743x_tx_frame_add_fragment 1618 */ 1619 dev_kfree_skb(skb); 1620 goto unlock; 1621 } 1622 } 1623 1624 finish: 1625 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync); 1626 1627 unlock: 1628 spin_unlock_irqrestore(&tx->ring_lock, irq_flags); 1629 return NETDEV_TX_OK; 1630 } 1631 1632 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight) 1633 { 1634 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi); 1635 struct lan743x_adapter *adapter = tx->adapter; 1636 bool start_transmitter = false; 1637 unsigned long irq_flags = 0; 1638 u32 ioc_bit = 0; 1639 u32 int_sts = 0; 1640 1641 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number); 1642 int_sts = lan743x_csr_read(adapter, DMAC_INT_STS); 1643 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) 1644 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit); 1645 spin_lock_irqsave(&tx->ring_lock, irq_flags); 1646 1647 /* clean up tx ring */ 1648 lan743x_tx_release_completed_descriptors(tx); 1649 if (netif_queue_stopped(adapter->netdev)) { 1650 if (tx->overflow_skb) { 1651 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <= 1652 lan743x_tx_get_avail_desc(tx)) 1653 start_transmitter = true; 1654 } else { 1655 netif_wake_queue(adapter->netdev); 1656 } 1657 } 1658 spin_unlock_irqrestore(&tx->ring_lock, irq_flags); 1659 1660 if (start_transmitter) { 1661 /* space is now available, transmit overflow skb */ 1662 lan743x_tx_xmit_frame(tx, tx->overflow_skb); 1663 tx->overflow_skb = NULL; 1664 netif_wake_queue(adapter->netdev); 1665 } 1666 1667 if (!napi_complete(napi)) 1668 goto done; 1669 1670 /* enable isr */ 1671 lan743x_csr_write(adapter, INT_EN_SET, 1672 INT_BIT_DMA_TX_(tx->channel_number)); 1673 lan743x_csr_read(adapter, INT_STS); 1674 1675 done: 1676 return 0; 1677 } 1678 1679 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx) 1680 { 1681 if (tx->head_cpu_ptr) { 1682 pci_free_consistent(tx->adapter->pdev, 1683 sizeof(*tx->head_cpu_ptr), 1684 (void *)(tx->head_cpu_ptr), 1685 tx->head_dma_ptr); 1686 tx->head_cpu_ptr = NULL; 1687 tx->head_dma_ptr = 0; 1688 } 1689 kfree(tx->buffer_info); 1690 tx->buffer_info = NULL; 1691 1692 if (tx->ring_cpu_ptr) { 1693 pci_free_consistent(tx->adapter->pdev, 1694 tx->ring_allocation_size, 1695 tx->ring_cpu_ptr, 1696 tx->ring_dma_ptr); 1697 tx->ring_allocation_size = 0; 1698 tx->ring_cpu_ptr = NULL; 1699 tx->ring_dma_ptr = 0; 1700 } 1701 tx->ring_size = 0; 1702 } 1703 1704 static int lan743x_tx_ring_init(struct lan743x_tx *tx) 1705 { 1706 size_t ring_allocation_size = 0; 1707 void *cpu_ptr = NULL; 1708 dma_addr_t dma_ptr; 1709 int ret = -ENOMEM; 1710 1711 tx->ring_size = LAN743X_TX_RING_SIZE; 1712 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) { 1713 ret = -EINVAL; 1714 goto cleanup; 1715 } 1716 ring_allocation_size = ALIGN(tx->ring_size * 1717 sizeof(struct lan743x_tx_descriptor), 1718 PAGE_SIZE); 1719 dma_ptr = 0; 1720 cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev, 1721 ring_allocation_size, &dma_ptr); 1722 if (!cpu_ptr) { 1723 ret = -ENOMEM; 1724 goto cleanup; 1725 } 1726 1727 tx->ring_allocation_size = ring_allocation_size; 1728 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr; 1729 tx->ring_dma_ptr = dma_ptr; 1730 1731 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL); 1732 if (!cpu_ptr) { 1733 ret = -ENOMEM; 1734 goto cleanup; 1735 } 1736 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr; 1737 dma_ptr = 0; 1738 cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev, 1739 sizeof(*tx->head_cpu_ptr), &dma_ptr); 1740 if (!cpu_ptr) { 1741 ret = -ENOMEM; 1742 goto cleanup; 1743 } 1744 1745 tx->head_cpu_ptr = cpu_ptr; 1746 tx->head_dma_ptr = dma_ptr; 1747 if (tx->head_dma_ptr & 0x3) { 1748 ret = -ENOMEM; 1749 goto cleanup; 1750 } 1751 1752 return 0; 1753 1754 cleanup: 1755 lan743x_tx_ring_cleanup(tx); 1756 return ret; 1757 } 1758 1759 static void lan743x_tx_close(struct lan743x_tx *tx) 1760 { 1761 struct lan743x_adapter *adapter = tx->adapter; 1762 1763 lan743x_csr_write(adapter, 1764 DMAC_CMD, 1765 DMAC_CMD_STOP_T_(tx->channel_number)); 1766 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number); 1767 1768 lan743x_csr_write(adapter, 1769 DMAC_INT_EN_CLR, 1770 DMAC_INT_BIT_TX_IOC_(tx->channel_number)); 1771 lan743x_csr_write(adapter, INT_EN_CLR, 1772 INT_BIT_DMA_TX_(tx->channel_number)); 1773 napi_disable(&tx->napi); 1774 netif_napi_del(&tx->napi); 1775 1776 lan743x_csr_write(adapter, FCT_TX_CTL, 1777 FCT_TX_CTL_DIS_(tx->channel_number)); 1778 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL, 1779 FCT_TX_CTL_EN_(tx->channel_number), 1780 0, 1000, 20000, 100); 1781 1782 lan743x_tx_release_all_descriptors(tx); 1783 1784 if (tx->overflow_skb) { 1785 dev_kfree_skb(tx->overflow_skb); 1786 tx->overflow_skb = NULL; 1787 } 1788 1789 lan743x_tx_ring_cleanup(tx); 1790 } 1791 1792 static int lan743x_tx_open(struct lan743x_tx *tx) 1793 { 1794 struct lan743x_adapter *adapter = NULL; 1795 u32 data = 0; 1796 int ret; 1797 1798 adapter = tx->adapter; 1799 ret = lan743x_tx_ring_init(tx); 1800 if (ret) 1801 return ret; 1802 1803 /* initialize fifo */ 1804 lan743x_csr_write(adapter, FCT_TX_CTL, 1805 FCT_TX_CTL_RESET_(tx->channel_number)); 1806 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL, 1807 FCT_TX_CTL_RESET_(tx->channel_number), 1808 0, 1000, 20000, 100); 1809 1810 /* enable fifo */ 1811 lan743x_csr_write(adapter, FCT_TX_CTL, 1812 FCT_TX_CTL_EN_(tx->channel_number)); 1813 1814 /* reset tx channel */ 1815 lan743x_csr_write(adapter, DMAC_CMD, 1816 DMAC_CMD_TX_SWR_(tx->channel_number)); 1817 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, 1818 DMAC_CMD_TX_SWR_(tx->channel_number), 1819 0, 1000, 20000, 100); 1820 1821 /* Write TX_BASE_ADDR */ 1822 lan743x_csr_write(adapter, 1823 TX_BASE_ADDRH(tx->channel_number), 1824 DMA_ADDR_HIGH32(tx->ring_dma_ptr)); 1825 lan743x_csr_write(adapter, 1826 TX_BASE_ADDRL(tx->channel_number), 1827 DMA_ADDR_LOW32(tx->ring_dma_ptr)); 1828 1829 /* Write TX_CFG_B */ 1830 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number)); 1831 data &= ~TX_CFG_B_TX_RING_LEN_MASK_; 1832 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_); 1833 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) 1834 data |= TX_CFG_B_TDMABL_512_; 1835 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data); 1836 1837 /* Write TX_CFG_A */ 1838 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_; 1839 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 1840 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_; 1841 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10); 1842 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04); 1843 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07); 1844 } 1845 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data); 1846 1847 /* Write TX_HEAD_WRITEBACK_ADDR */ 1848 lan743x_csr_write(adapter, 1849 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number), 1850 DMA_ADDR_HIGH32(tx->head_dma_ptr)); 1851 lan743x_csr_write(adapter, 1852 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number), 1853 DMA_ADDR_LOW32(tx->head_dma_ptr)); 1854 1855 /* set last head */ 1856 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number)); 1857 1858 /* write TX_TAIL */ 1859 tx->last_tail = 0; 1860 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number), 1861 (u32)(tx->last_tail)); 1862 tx->vector_flags = lan743x_intr_get_vector_flags(adapter, 1863 INT_BIT_DMA_TX_ 1864 (tx->channel_number)); 1865 netif_tx_napi_add(adapter->netdev, 1866 &tx->napi, lan743x_tx_napi_poll, 1867 tx->ring_size - 1); 1868 napi_enable(&tx->napi); 1869 1870 data = 0; 1871 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR) 1872 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_; 1873 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR) 1874 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_; 1875 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C) 1876 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_; 1877 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C) 1878 data |= TX_CFG_C_TX_INT_EN_R2C_; 1879 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data); 1880 1881 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)) 1882 lan743x_csr_write(adapter, INT_EN_SET, 1883 INT_BIT_DMA_TX_(tx->channel_number)); 1884 lan743x_csr_write(adapter, DMAC_INT_EN_SET, 1885 DMAC_INT_BIT_TX_IOC_(tx->channel_number)); 1886 1887 /* start dmac channel */ 1888 lan743x_csr_write(adapter, DMAC_CMD, 1889 DMAC_CMD_START_T_(tx->channel_number)); 1890 return 0; 1891 } 1892 1893 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index) 1894 { 1895 return ((++index) % rx->ring_size); 1896 } 1897 1898 static struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx) 1899 { 1900 int length = 0; 1901 1902 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING); 1903 return __netdev_alloc_skb(rx->adapter->netdev, 1904 length, GFP_ATOMIC | GFP_DMA); 1905 } 1906 1907 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index, 1908 struct sk_buff *skb) 1909 { 1910 struct lan743x_rx_buffer_info *buffer_info; 1911 struct lan743x_rx_descriptor *descriptor; 1912 int length = 0; 1913 1914 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING); 1915 descriptor = &rx->ring_cpu_ptr[index]; 1916 buffer_info = &rx->buffer_info[index]; 1917 buffer_info->skb = skb; 1918 if (!(buffer_info->skb)) 1919 return -ENOMEM; 1920 buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev, 1921 buffer_info->skb->data, 1922 length, 1923 DMA_FROM_DEVICE); 1924 if (dma_mapping_error(&rx->adapter->pdev->dev, 1925 buffer_info->dma_ptr)) { 1926 buffer_info->dma_ptr = 0; 1927 return -ENOMEM; 1928 } 1929 1930 buffer_info->buffer_length = length; 1931 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr); 1932 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr); 1933 descriptor->data3 = 0; 1934 descriptor->data0 = (RX_DESC_DATA0_OWN_ | 1935 (length & RX_DESC_DATA0_BUF_LENGTH_MASK_)); 1936 skb_reserve(buffer_info->skb, RX_HEAD_PADDING); 1937 1938 return 0; 1939 } 1940 1941 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index) 1942 { 1943 struct lan743x_rx_buffer_info *buffer_info; 1944 struct lan743x_rx_descriptor *descriptor; 1945 1946 descriptor = &rx->ring_cpu_ptr[index]; 1947 buffer_info = &rx->buffer_info[index]; 1948 1949 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr); 1950 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr); 1951 descriptor->data3 = 0; 1952 descriptor->data0 = (RX_DESC_DATA0_OWN_ | 1953 ((buffer_info->buffer_length) & 1954 RX_DESC_DATA0_BUF_LENGTH_MASK_)); 1955 } 1956 1957 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index) 1958 { 1959 struct lan743x_rx_buffer_info *buffer_info; 1960 struct lan743x_rx_descriptor *descriptor; 1961 1962 descriptor = &rx->ring_cpu_ptr[index]; 1963 buffer_info = &rx->buffer_info[index]; 1964 1965 memset(descriptor, 0, sizeof(*descriptor)); 1966 1967 if (buffer_info->dma_ptr) { 1968 dma_unmap_single(&rx->adapter->pdev->dev, 1969 buffer_info->dma_ptr, 1970 buffer_info->buffer_length, 1971 DMA_FROM_DEVICE); 1972 buffer_info->dma_ptr = 0; 1973 } 1974 1975 if (buffer_info->skb) { 1976 dev_kfree_skb(buffer_info->skb); 1977 buffer_info->skb = NULL; 1978 } 1979 1980 memset(buffer_info, 0, sizeof(*buffer_info)); 1981 } 1982 1983 static int lan743x_rx_process_packet(struct lan743x_rx *rx) 1984 { 1985 struct skb_shared_hwtstamps *hwtstamps = NULL; 1986 int result = RX_PROCESS_RESULT_NOTHING_TO_DO; 1987 struct lan743x_rx_buffer_info *buffer_info; 1988 struct lan743x_rx_descriptor *descriptor; 1989 int current_head_index = -1; 1990 int extension_index = -1; 1991 int first_index = -1; 1992 int last_index = -1; 1993 1994 current_head_index = *rx->head_cpu_ptr; 1995 if (current_head_index < 0 || current_head_index >= rx->ring_size) 1996 goto done; 1997 1998 if (rx->last_head < 0 || rx->last_head >= rx->ring_size) 1999 goto done; 2000 2001 if (rx->last_head != current_head_index) { 2002 descriptor = &rx->ring_cpu_ptr[rx->last_head]; 2003 if (descriptor->data0 & RX_DESC_DATA0_OWN_) 2004 goto done; 2005 2006 if (!(descriptor->data0 & RX_DESC_DATA0_FS_)) 2007 goto done; 2008 2009 first_index = rx->last_head; 2010 if (descriptor->data0 & RX_DESC_DATA0_LS_) { 2011 last_index = rx->last_head; 2012 } else { 2013 int index; 2014 2015 index = lan743x_rx_next_index(rx, first_index); 2016 while (index != current_head_index) { 2017 descriptor = &rx->ring_cpu_ptr[index]; 2018 if (descriptor->data0 & RX_DESC_DATA0_OWN_) 2019 goto done; 2020 2021 if (descriptor->data0 & RX_DESC_DATA0_LS_) { 2022 last_index = index; 2023 break; 2024 } 2025 index = lan743x_rx_next_index(rx, index); 2026 } 2027 } 2028 if (last_index >= 0) { 2029 descriptor = &rx->ring_cpu_ptr[last_index]; 2030 if (descriptor->data0 & RX_DESC_DATA0_EXT_) { 2031 /* extension is expected to follow */ 2032 int index = lan743x_rx_next_index(rx, 2033 last_index); 2034 if (index != current_head_index) { 2035 descriptor = &rx->ring_cpu_ptr[index]; 2036 if (descriptor->data0 & 2037 RX_DESC_DATA0_OWN_) { 2038 goto done; 2039 } 2040 if (descriptor->data0 & 2041 RX_DESC_DATA0_EXT_) { 2042 extension_index = index; 2043 } else { 2044 goto done; 2045 } 2046 } else { 2047 /* extension is not yet available */ 2048 /* prevent processing of this packet */ 2049 first_index = -1; 2050 last_index = -1; 2051 } 2052 } 2053 } 2054 } 2055 if (first_index >= 0 && last_index >= 0) { 2056 int real_last_index = last_index; 2057 struct sk_buff *skb = NULL; 2058 u32 ts_sec = 0; 2059 u32 ts_nsec = 0; 2060 2061 /* packet is available */ 2062 if (first_index == last_index) { 2063 /* single buffer packet */ 2064 struct sk_buff *new_skb = NULL; 2065 int packet_length; 2066 2067 new_skb = lan743x_rx_allocate_skb(rx); 2068 if (!new_skb) { 2069 /* failed to allocate next skb. 2070 * Memory is very low. 2071 * Drop this packet and reuse buffer. 2072 */ 2073 lan743x_rx_reuse_ring_element(rx, first_index); 2074 goto process_extension; 2075 } 2076 2077 buffer_info = &rx->buffer_info[first_index]; 2078 skb = buffer_info->skb; 2079 descriptor = &rx->ring_cpu_ptr[first_index]; 2080 2081 /* unmap from dma */ 2082 if (buffer_info->dma_ptr) { 2083 dma_unmap_single(&rx->adapter->pdev->dev, 2084 buffer_info->dma_ptr, 2085 buffer_info->buffer_length, 2086 DMA_FROM_DEVICE); 2087 buffer_info->dma_ptr = 0; 2088 buffer_info->buffer_length = 0; 2089 } 2090 buffer_info->skb = NULL; 2091 packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_ 2092 (descriptor->data0); 2093 skb_put(skb, packet_length - 4); 2094 skb->protocol = eth_type_trans(skb, 2095 rx->adapter->netdev); 2096 lan743x_rx_init_ring_element(rx, first_index, new_skb); 2097 } else { 2098 int index = first_index; 2099 2100 /* multi buffer packet not supported */ 2101 /* this should not happen since 2102 * buffers are allocated to be at least jumbo size 2103 */ 2104 2105 /* clean up buffers */ 2106 if (first_index <= last_index) { 2107 while ((index >= first_index) && 2108 (index <= last_index)) { 2109 lan743x_rx_reuse_ring_element(rx, 2110 index); 2111 index = lan743x_rx_next_index(rx, 2112 index); 2113 } 2114 } else { 2115 while ((index >= first_index) || 2116 (index <= last_index)) { 2117 lan743x_rx_reuse_ring_element(rx, 2118 index); 2119 index = lan743x_rx_next_index(rx, 2120 index); 2121 } 2122 } 2123 } 2124 2125 process_extension: 2126 if (extension_index >= 0) { 2127 descriptor = &rx->ring_cpu_ptr[extension_index]; 2128 buffer_info = &rx->buffer_info[extension_index]; 2129 2130 ts_sec = descriptor->data1; 2131 ts_nsec = (descriptor->data2 & 2132 RX_DESC_DATA2_TS_NS_MASK_); 2133 lan743x_rx_reuse_ring_element(rx, extension_index); 2134 real_last_index = extension_index; 2135 } 2136 2137 if (!skb) { 2138 result = RX_PROCESS_RESULT_PACKET_DROPPED; 2139 goto move_forward; 2140 } 2141 2142 if (extension_index < 0) 2143 goto pass_packet_to_os; 2144 hwtstamps = skb_hwtstamps(skb); 2145 if (hwtstamps) 2146 hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec); 2147 2148 pass_packet_to_os: 2149 /* pass packet to OS */ 2150 napi_gro_receive(&rx->napi, skb); 2151 result = RX_PROCESS_RESULT_PACKET_RECEIVED; 2152 2153 move_forward: 2154 /* push tail and head forward */ 2155 rx->last_tail = real_last_index; 2156 rx->last_head = lan743x_rx_next_index(rx, real_last_index); 2157 } 2158 done: 2159 return result; 2160 } 2161 2162 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight) 2163 { 2164 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi); 2165 struct lan743x_adapter *adapter = rx->adapter; 2166 u32 rx_tail_flags = 0; 2167 int count; 2168 2169 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) { 2170 /* clear int status bit before reading packet */ 2171 lan743x_csr_write(adapter, DMAC_INT_STS, 2172 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2173 } 2174 count = 0; 2175 while (count < weight) { 2176 int rx_process_result = -1; 2177 2178 rx_process_result = lan743x_rx_process_packet(rx); 2179 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) { 2180 count++; 2181 } else if (rx_process_result == 2182 RX_PROCESS_RESULT_NOTHING_TO_DO) { 2183 break; 2184 } else if (rx_process_result == 2185 RX_PROCESS_RESULT_PACKET_DROPPED) { 2186 continue; 2187 } 2188 } 2189 rx->frame_count += count; 2190 if (count == weight) 2191 goto done; 2192 2193 if (!napi_complete_done(napi, count)) 2194 goto done; 2195 2196 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET) 2197 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_; 2198 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) { 2199 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_; 2200 } else { 2201 lan743x_csr_write(adapter, INT_EN_SET, 2202 INT_BIT_DMA_RX_(rx->channel_number)); 2203 } 2204 2205 /* update RX_TAIL */ 2206 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number), 2207 rx_tail_flags | rx->last_tail); 2208 done: 2209 return count; 2210 } 2211 2212 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx) 2213 { 2214 if (rx->buffer_info && rx->ring_cpu_ptr) { 2215 int index; 2216 2217 for (index = 0; index < rx->ring_size; index++) 2218 lan743x_rx_release_ring_element(rx, index); 2219 } 2220 2221 if (rx->head_cpu_ptr) { 2222 pci_free_consistent(rx->adapter->pdev, 2223 sizeof(*rx->head_cpu_ptr), 2224 rx->head_cpu_ptr, 2225 rx->head_dma_ptr); 2226 rx->head_cpu_ptr = NULL; 2227 rx->head_dma_ptr = 0; 2228 } 2229 2230 kfree(rx->buffer_info); 2231 rx->buffer_info = NULL; 2232 2233 if (rx->ring_cpu_ptr) { 2234 pci_free_consistent(rx->adapter->pdev, 2235 rx->ring_allocation_size, 2236 rx->ring_cpu_ptr, 2237 rx->ring_dma_ptr); 2238 rx->ring_allocation_size = 0; 2239 rx->ring_cpu_ptr = NULL; 2240 rx->ring_dma_ptr = 0; 2241 } 2242 2243 rx->ring_size = 0; 2244 rx->last_head = 0; 2245 } 2246 2247 static int lan743x_rx_ring_init(struct lan743x_rx *rx) 2248 { 2249 size_t ring_allocation_size = 0; 2250 dma_addr_t dma_ptr = 0; 2251 void *cpu_ptr = NULL; 2252 int ret = -ENOMEM; 2253 int index = 0; 2254 2255 rx->ring_size = LAN743X_RX_RING_SIZE; 2256 if (rx->ring_size <= 1) { 2257 ret = -EINVAL; 2258 goto cleanup; 2259 } 2260 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) { 2261 ret = -EINVAL; 2262 goto cleanup; 2263 } 2264 ring_allocation_size = ALIGN(rx->ring_size * 2265 sizeof(struct lan743x_rx_descriptor), 2266 PAGE_SIZE); 2267 dma_ptr = 0; 2268 cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev, 2269 ring_allocation_size, &dma_ptr); 2270 if (!cpu_ptr) { 2271 ret = -ENOMEM; 2272 goto cleanup; 2273 } 2274 rx->ring_allocation_size = ring_allocation_size; 2275 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr; 2276 rx->ring_dma_ptr = dma_ptr; 2277 2278 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info), 2279 GFP_KERNEL); 2280 if (!cpu_ptr) { 2281 ret = -ENOMEM; 2282 goto cleanup; 2283 } 2284 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr; 2285 dma_ptr = 0; 2286 cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev, 2287 sizeof(*rx->head_cpu_ptr), &dma_ptr); 2288 if (!cpu_ptr) { 2289 ret = -ENOMEM; 2290 goto cleanup; 2291 } 2292 2293 rx->head_cpu_ptr = cpu_ptr; 2294 rx->head_dma_ptr = dma_ptr; 2295 if (rx->head_dma_ptr & 0x3) { 2296 ret = -ENOMEM; 2297 goto cleanup; 2298 } 2299 2300 rx->last_head = 0; 2301 for (index = 0; index < rx->ring_size; index++) { 2302 struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx); 2303 2304 ret = lan743x_rx_init_ring_element(rx, index, new_skb); 2305 if (ret) 2306 goto cleanup; 2307 } 2308 return 0; 2309 2310 cleanup: 2311 lan743x_rx_ring_cleanup(rx); 2312 return ret; 2313 } 2314 2315 static void lan743x_rx_close(struct lan743x_rx *rx) 2316 { 2317 struct lan743x_adapter *adapter = rx->adapter; 2318 2319 lan743x_csr_write(adapter, FCT_RX_CTL, 2320 FCT_RX_CTL_DIS_(rx->channel_number)); 2321 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL, 2322 FCT_RX_CTL_EN_(rx->channel_number), 2323 0, 1000, 20000, 100); 2324 2325 lan743x_csr_write(adapter, DMAC_CMD, 2326 DMAC_CMD_STOP_R_(rx->channel_number)); 2327 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number); 2328 2329 lan743x_csr_write(adapter, DMAC_INT_EN_CLR, 2330 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2331 lan743x_csr_write(adapter, INT_EN_CLR, 2332 INT_BIT_DMA_RX_(rx->channel_number)); 2333 napi_disable(&rx->napi); 2334 2335 netif_napi_del(&rx->napi); 2336 2337 lan743x_rx_ring_cleanup(rx); 2338 } 2339 2340 static int lan743x_rx_open(struct lan743x_rx *rx) 2341 { 2342 struct lan743x_adapter *adapter = rx->adapter; 2343 u32 data = 0; 2344 int ret; 2345 2346 rx->frame_count = 0; 2347 ret = lan743x_rx_ring_init(rx); 2348 if (ret) 2349 goto return_error; 2350 2351 netif_napi_add(adapter->netdev, 2352 &rx->napi, lan743x_rx_napi_poll, 2353 rx->ring_size - 1); 2354 2355 lan743x_csr_write(adapter, DMAC_CMD, 2356 DMAC_CMD_RX_SWR_(rx->channel_number)); 2357 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, 2358 DMAC_CMD_RX_SWR_(rx->channel_number), 2359 0, 1000, 20000, 100); 2360 2361 /* set ring base address */ 2362 lan743x_csr_write(adapter, 2363 RX_BASE_ADDRH(rx->channel_number), 2364 DMA_ADDR_HIGH32(rx->ring_dma_ptr)); 2365 lan743x_csr_write(adapter, 2366 RX_BASE_ADDRL(rx->channel_number), 2367 DMA_ADDR_LOW32(rx->ring_dma_ptr)); 2368 2369 /* set rx write back address */ 2370 lan743x_csr_write(adapter, 2371 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number), 2372 DMA_ADDR_HIGH32(rx->head_dma_ptr)); 2373 lan743x_csr_write(adapter, 2374 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number), 2375 DMA_ADDR_LOW32(rx->head_dma_ptr)); 2376 data = RX_CFG_A_RX_HP_WB_EN_; 2377 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 2378 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ | 2379 RX_CFG_A_RX_WB_THRES_SET_(0x7) | 2380 RX_CFG_A_RX_PF_THRES_SET_(16) | 2381 RX_CFG_A_RX_PF_PRI_THRES_SET_(4)); 2382 } 2383 2384 /* set RX_CFG_A */ 2385 lan743x_csr_write(adapter, 2386 RX_CFG_A(rx->channel_number), data); 2387 2388 /* set RX_CFG_B */ 2389 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number)); 2390 data &= ~RX_CFG_B_RX_PAD_MASK_; 2391 if (!RX_HEAD_PADDING) 2392 data |= RX_CFG_B_RX_PAD_0_; 2393 else 2394 data |= RX_CFG_B_RX_PAD_2_; 2395 data &= ~RX_CFG_B_RX_RING_LEN_MASK_; 2396 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_); 2397 data |= RX_CFG_B_TS_ALL_RX_; 2398 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) 2399 data |= RX_CFG_B_RDMABL_512_; 2400 2401 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data); 2402 rx->vector_flags = lan743x_intr_get_vector_flags(adapter, 2403 INT_BIT_DMA_RX_ 2404 (rx->channel_number)); 2405 2406 /* set RX_CFG_C */ 2407 data = 0; 2408 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR) 2409 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_; 2410 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR) 2411 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_; 2412 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C) 2413 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_; 2414 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C) 2415 data |= RX_CFG_C_RX_INT_EN_R2C_; 2416 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data); 2417 2418 rx->last_tail = ((u32)(rx->ring_size - 1)); 2419 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number), 2420 rx->last_tail); 2421 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number)); 2422 if (rx->last_head) { 2423 ret = -EIO; 2424 goto napi_delete; 2425 } 2426 2427 napi_enable(&rx->napi); 2428 2429 lan743x_csr_write(adapter, INT_EN_SET, 2430 INT_BIT_DMA_RX_(rx->channel_number)); 2431 lan743x_csr_write(adapter, DMAC_INT_STS, 2432 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2433 lan743x_csr_write(adapter, DMAC_INT_EN_SET, 2434 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2435 lan743x_csr_write(adapter, DMAC_CMD, 2436 DMAC_CMD_START_R_(rx->channel_number)); 2437 2438 /* initialize fifo */ 2439 lan743x_csr_write(adapter, FCT_RX_CTL, 2440 FCT_RX_CTL_RESET_(rx->channel_number)); 2441 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL, 2442 FCT_RX_CTL_RESET_(rx->channel_number), 2443 0, 1000, 20000, 100); 2444 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number), 2445 FCT_FLOW_CTL_REQ_EN_ | 2446 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) | 2447 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA)); 2448 2449 /* enable fifo */ 2450 lan743x_csr_write(adapter, FCT_RX_CTL, 2451 FCT_RX_CTL_EN_(rx->channel_number)); 2452 return 0; 2453 2454 napi_delete: 2455 netif_napi_del(&rx->napi); 2456 lan743x_rx_ring_cleanup(rx); 2457 2458 return_error: 2459 return ret; 2460 } 2461 2462 static int lan743x_netdev_close(struct net_device *netdev) 2463 { 2464 struct lan743x_adapter *adapter = netdev_priv(netdev); 2465 int index; 2466 2467 lan743x_tx_close(&adapter->tx[0]); 2468 2469 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) 2470 lan743x_rx_close(&adapter->rx[index]); 2471 2472 lan743x_ptp_close(adapter); 2473 2474 lan743x_phy_close(adapter); 2475 2476 lan743x_mac_close(adapter); 2477 2478 lan743x_intr_close(adapter); 2479 2480 return 0; 2481 } 2482 2483 static int lan743x_netdev_open(struct net_device *netdev) 2484 { 2485 struct lan743x_adapter *adapter = netdev_priv(netdev); 2486 int index; 2487 int ret; 2488 2489 ret = lan743x_intr_open(adapter); 2490 if (ret) 2491 goto return_error; 2492 2493 ret = lan743x_mac_open(adapter); 2494 if (ret) 2495 goto close_intr; 2496 2497 ret = lan743x_phy_open(adapter); 2498 if (ret) 2499 goto close_mac; 2500 2501 ret = lan743x_ptp_open(adapter); 2502 if (ret) 2503 goto close_phy; 2504 2505 lan743x_rfe_open(adapter); 2506 2507 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) { 2508 ret = lan743x_rx_open(&adapter->rx[index]); 2509 if (ret) 2510 goto close_rx; 2511 } 2512 2513 ret = lan743x_tx_open(&adapter->tx[0]); 2514 if (ret) 2515 goto close_rx; 2516 2517 return 0; 2518 2519 close_rx: 2520 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) { 2521 if (adapter->rx[index].ring_cpu_ptr) 2522 lan743x_rx_close(&adapter->rx[index]); 2523 } 2524 lan743x_ptp_close(adapter); 2525 2526 close_phy: 2527 lan743x_phy_close(adapter); 2528 2529 close_mac: 2530 lan743x_mac_close(adapter); 2531 2532 close_intr: 2533 lan743x_intr_close(adapter); 2534 2535 return_error: 2536 netif_warn(adapter, ifup, adapter->netdev, 2537 "Error opening LAN743x\n"); 2538 return ret; 2539 } 2540 2541 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb, 2542 struct net_device *netdev) 2543 { 2544 struct lan743x_adapter *adapter = netdev_priv(netdev); 2545 2546 return lan743x_tx_xmit_frame(&adapter->tx[0], skb); 2547 } 2548 2549 static int lan743x_netdev_ioctl(struct net_device *netdev, 2550 struct ifreq *ifr, int cmd) 2551 { 2552 if (!netif_running(netdev)) 2553 return -EINVAL; 2554 if (cmd == SIOCSHWTSTAMP) 2555 return lan743x_ptp_ioctl(netdev, ifr, cmd); 2556 return phy_mii_ioctl(netdev->phydev, ifr, cmd); 2557 } 2558 2559 static void lan743x_netdev_set_multicast(struct net_device *netdev) 2560 { 2561 struct lan743x_adapter *adapter = netdev_priv(netdev); 2562 2563 lan743x_rfe_set_multicast(adapter); 2564 } 2565 2566 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu) 2567 { 2568 struct lan743x_adapter *adapter = netdev_priv(netdev); 2569 int ret = 0; 2570 2571 ret = lan743x_mac_set_mtu(adapter, new_mtu); 2572 if (!ret) 2573 netdev->mtu = new_mtu; 2574 return ret; 2575 } 2576 2577 static void lan743x_netdev_get_stats64(struct net_device *netdev, 2578 struct rtnl_link_stats64 *stats) 2579 { 2580 struct lan743x_adapter *adapter = netdev_priv(netdev); 2581 2582 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES); 2583 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES); 2584 stats->rx_bytes = lan743x_csr_read(adapter, 2585 STAT_RX_UNICAST_BYTE_COUNT) + 2586 lan743x_csr_read(adapter, 2587 STAT_RX_BROADCAST_BYTE_COUNT) + 2588 lan743x_csr_read(adapter, 2589 STAT_RX_MULTICAST_BYTE_COUNT); 2590 stats->tx_bytes = lan743x_csr_read(adapter, 2591 STAT_TX_UNICAST_BYTE_COUNT) + 2592 lan743x_csr_read(adapter, 2593 STAT_TX_BROADCAST_BYTE_COUNT) + 2594 lan743x_csr_read(adapter, 2595 STAT_TX_MULTICAST_BYTE_COUNT); 2596 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) + 2597 lan743x_csr_read(adapter, 2598 STAT_RX_ALIGNMENT_ERRORS) + 2599 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) + 2600 lan743x_csr_read(adapter, 2601 STAT_RX_UNDERSIZE_FRAME_ERRORS) + 2602 lan743x_csr_read(adapter, 2603 STAT_RX_OVERSIZE_FRAME_ERRORS); 2604 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) + 2605 lan743x_csr_read(adapter, 2606 STAT_TX_EXCESS_DEFERRAL_ERRORS) + 2607 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS); 2608 stats->rx_dropped = lan743x_csr_read(adapter, 2609 STAT_RX_DROPPED_FRAMES); 2610 stats->tx_dropped = lan743x_csr_read(adapter, 2611 STAT_TX_EXCESSIVE_COLLISION); 2612 stats->multicast = lan743x_csr_read(adapter, 2613 STAT_RX_MULTICAST_FRAMES) + 2614 lan743x_csr_read(adapter, 2615 STAT_TX_MULTICAST_FRAMES); 2616 stats->collisions = lan743x_csr_read(adapter, 2617 STAT_TX_SINGLE_COLLISIONS) + 2618 lan743x_csr_read(adapter, 2619 STAT_TX_MULTIPLE_COLLISIONS) + 2620 lan743x_csr_read(adapter, 2621 STAT_TX_LATE_COLLISIONS); 2622 } 2623 2624 static int lan743x_netdev_set_mac_address(struct net_device *netdev, 2625 void *addr) 2626 { 2627 struct lan743x_adapter *adapter = netdev_priv(netdev); 2628 struct sockaddr *sock_addr = addr; 2629 int ret; 2630 2631 ret = eth_prepare_mac_addr_change(netdev, sock_addr); 2632 if (ret) 2633 return ret; 2634 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data); 2635 lan743x_mac_set_address(adapter, sock_addr->sa_data); 2636 lan743x_rfe_update_mac_address(adapter); 2637 return 0; 2638 } 2639 2640 static const struct net_device_ops lan743x_netdev_ops = { 2641 .ndo_open = lan743x_netdev_open, 2642 .ndo_stop = lan743x_netdev_close, 2643 .ndo_start_xmit = lan743x_netdev_xmit_frame, 2644 .ndo_do_ioctl = lan743x_netdev_ioctl, 2645 .ndo_set_rx_mode = lan743x_netdev_set_multicast, 2646 .ndo_change_mtu = lan743x_netdev_change_mtu, 2647 .ndo_get_stats64 = lan743x_netdev_get_stats64, 2648 .ndo_set_mac_address = lan743x_netdev_set_mac_address, 2649 }; 2650 2651 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter) 2652 { 2653 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF); 2654 } 2655 2656 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter) 2657 { 2658 mdiobus_unregister(adapter->mdiobus); 2659 } 2660 2661 static void lan743x_full_cleanup(struct lan743x_adapter *adapter) 2662 { 2663 unregister_netdev(adapter->netdev); 2664 2665 lan743x_mdiobus_cleanup(adapter); 2666 lan743x_hardware_cleanup(adapter); 2667 lan743x_pci_cleanup(adapter); 2668 } 2669 2670 static int lan743x_hardware_init(struct lan743x_adapter *adapter, 2671 struct pci_dev *pdev) 2672 { 2673 struct lan743x_tx *tx; 2674 int index; 2675 int ret; 2676 2677 adapter->intr.irq = adapter->pdev->irq; 2678 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF); 2679 mutex_init(&adapter->dp_lock); 2680 2681 ret = lan743x_gpio_init(adapter); 2682 if (ret) 2683 return ret; 2684 2685 ret = lan743x_mac_init(adapter); 2686 if (ret) 2687 return ret; 2688 2689 ret = lan743x_phy_init(adapter); 2690 if (ret) 2691 return ret; 2692 2693 ret = lan743x_ptp_init(adapter); 2694 if (ret) 2695 return ret; 2696 2697 lan743x_rfe_update_mac_address(adapter); 2698 2699 ret = lan743x_dmac_init(adapter); 2700 if (ret) 2701 return ret; 2702 2703 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) { 2704 adapter->rx[index].adapter = adapter; 2705 adapter->rx[index].channel_number = index; 2706 } 2707 2708 tx = &adapter->tx[0]; 2709 tx->adapter = adapter; 2710 tx->channel_number = 0; 2711 spin_lock_init(&tx->ring_lock); 2712 return 0; 2713 } 2714 2715 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter) 2716 { 2717 int ret; 2718 2719 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev); 2720 if (!(adapter->mdiobus)) { 2721 ret = -ENOMEM; 2722 goto return_error; 2723 } 2724 2725 adapter->mdiobus->priv = (void *)adapter; 2726 adapter->mdiobus->read = lan743x_mdiobus_read; 2727 adapter->mdiobus->write = lan743x_mdiobus_write; 2728 adapter->mdiobus->name = "lan743x-mdiobus"; 2729 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE, 2730 "pci-%s", pci_name(adapter->pdev)); 2731 2732 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_) 2733 /* LAN7430 uses internal phy at address 1 */ 2734 adapter->mdiobus->phy_mask = ~(u32)BIT(1); 2735 2736 /* register mdiobus */ 2737 ret = mdiobus_register(adapter->mdiobus); 2738 if (ret < 0) 2739 goto return_error; 2740 return 0; 2741 2742 return_error: 2743 return ret; 2744 } 2745 2746 /* lan743x_pcidev_probe - Device Initialization Routine 2747 * @pdev: PCI device information struct 2748 * @id: entry in lan743x_pci_tbl 2749 * 2750 * Returns 0 on success, negative on failure 2751 * 2752 * initializes an adapter identified by a pci_dev structure. 2753 * The OS initialization, configuring of the adapter private structure, 2754 * and a hardware reset occur. 2755 **/ 2756 static int lan743x_pcidev_probe(struct pci_dev *pdev, 2757 const struct pci_device_id *id) 2758 { 2759 struct lan743x_adapter *adapter = NULL; 2760 struct net_device *netdev = NULL; 2761 int ret = -ENODEV; 2762 2763 netdev = devm_alloc_etherdev(&pdev->dev, 2764 sizeof(struct lan743x_adapter)); 2765 if (!netdev) 2766 goto return_error; 2767 2768 SET_NETDEV_DEV(netdev, &pdev->dev); 2769 pci_set_drvdata(pdev, netdev); 2770 adapter = netdev_priv(netdev); 2771 adapter->netdev = netdev; 2772 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE | 2773 NETIF_MSG_LINK | NETIF_MSG_IFUP | 2774 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED; 2775 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE; 2776 2777 ret = lan743x_pci_init(adapter, pdev); 2778 if (ret) 2779 goto return_error; 2780 2781 ret = lan743x_csr_init(adapter); 2782 if (ret) 2783 goto cleanup_pci; 2784 2785 ret = lan743x_hardware_init(adapter, pdev); 2786 if (ret) 2787 goto cleanup_pci; 2788 2789 ret = lan743x_mdiobus_init(adapter); 2790 if (ret) 2791 goto cleanup_hardware; 2792 2793 adapter->netdev->netdev_ops = &lan743x_netdev_ops; 2794 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops; 2795 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM; 2796 adapter->netdev->hw_features = adapter->netdev->features; 2797 2798 /* carrier off reporting is important to ethtool even BEFORE open */ 2799 netif_carrier_off(netdev); 2800 2801 ret = register_netdev(adapter->netdev); 2802 if (ret < 0) 2803 goto cleanup_mdiobus; 2804 return 0; 2805 2806 cleanup_mdiobus: 2807 lan743x_mdiobus_cleanup(adapter); 2808 2809 cleanup_hardware: 2810 lan743x_hardware_cleanup(adapter); 2811 2812 cleanup_pci: 2813 lan743x_pci_cleanup(adapter); 2814 2815 return_error: 2816 pr_warn("Initialization failed\n"); 2817 return ret; 2818 } 2819 2820 /** 2821 * lan743x_pcidev_remove - Device Removal Routine 2822 * @pdev: PCI device information struct 2823 * 2824 * this is called by the PCI subsystem to alert the driver 2825 * that it should release a PCI device. This could be caused by a 2826 * Hot-Plug event, or because the driver is going to be removed from 2827 * memory. 2828 **/ 2829 static void lan743x_pcidev_remove(struct pci_dev *pdev) 2830 { 2831 struct net_device *netdev = pci_get_drvdata(pdev); 2832 struct lan743x_adapter *adapter = netdev_priv(netdev); 2833 2834 lan743x_full_cleanup(adapter); 2835 } 2836 2837 static void lan743x_pcidev_shutdown(struct pci_dev *pdev) 2838 { 2839 struct net_device *netdev = pci_get_drvdata(pdev); 2840 struct lan743x_adapter *adapter = netdev_priv(netdev); 2841 2842 rtnl_lock(); 2843 netif_device_detach(netdev); 2844 2845 /* close netdev when netdev is at running state. 2846 * For instance, it is true when system goes to sleep by pm-suspend 2847 * However, it is false when system goes to sleep by suspend GUI menu 2848 */ 2849 if (netif_running(netdev)) 2850 lan743x_netdev_close(netdev); 2851 rtnl_unlock(); 2852 2853 #ifdef CONFIG_PM 2854 pci_save_state(pdev); 2855 #endif 2856 2857 /* clean up lan743x portion */ 2858 lan743x_hardware_cleanup(adapter); 2859 } 2860 2861 #ifdef CONFIG_PM_SLEEP 2862 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len) 2863 { 2864 return bitrev16(crc16(0xFFFF, buf, len)); 2865 } 2866 2867 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter) 2868 { 2869 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E }; 2870 const u8 ipv6_multicast[3] = { 0x33, 0x33 }; 2871 const u8 arp_type[2] = { 0x08, 0x06 }; 2872 int mask_index; 2873 u32 pmtctl; 2874 u32 wucsr; 2875 u32 macrx; 2876 u16 crc; 2877 2878 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++) 2879 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0); 2880 2881 /* clear wake settings */ 2882 pmtctl = lan743x_csr_read(adapter, PMT_CTL); 2883 pmtctl |= PMT_CTL_WUPS_MASK_; 2884 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ | 2885 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ | 2886 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_); 2887 2888 macrx = lan743x_csr_read(adapter, MAC_RX); 2889 2890 wucsr = 0; 2891 mask_index = 0; 2892 2893 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_; 2894 2895 if (adapter->wolopts & WAKE_PHY) { 2896 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_; 2897 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_; 2898 } 2899 if (adapter->wolopts & WAKE_MAGIC) { 2900 wucsr |= MAC_WUCSR_MPEN_; 2901 macrx |= MAC_RX_RXEN_; 2902 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2903 } 2904 if (adapter->wolopts & WAKE_UCAST) { 2905 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_; 2906 macrx |= MAC_RX_RXEN_; 2907 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2908 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2909 } 2910 if (adapter->wolopts & WAKE_BCAST) { 2911 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_; 2912 macrx |= MAC_RX_RXEN_; 2913 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2914 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2915 } 2916 if (adapter->wolopts & WAKE_MCAST) { 2917 /* IPv4 multicast */ 2918 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3); 2919 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 2920 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ | 2921 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | 2922 (crc & MAC_WUF_CFG_CRC16_MASK_)); 2923 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7); 2924 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); 2925 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); 2926 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); 2927 mask_index++; 2928 2929 /* IPv6 multicast */ 2930 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2); 2931 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 2932 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ | 2933 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | 2934 (crc & MAC_WUF_CFG_CRC16_MASK_)); 2935 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3); 2936 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); 2937 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); 2938 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); 2939 mask_index++; 2940 2941 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_; 2942 macrx |= MAC_RX_RXEN_; 2943 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2944 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2945 } 2946 if (adapter->wolopts & WAKE_ARP) { 2947 /* set MAC_WUF_CFG & WUF_MASK 2948 * for packettype (offset 12,13) = ARP (0x0806) 2949 */ 2950 crc = lan743x_pm_wakeframe_crc16(arp_type, 2); 2951 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 2952 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ | 2953 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | 2954 (crc & MAC_WUF_CFG_CRC16_MASK_)); 2955 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000); 2956 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); 2957 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); 2958 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); 2959 mask_index++; 2960 2961 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_; 2962 macrx |= MAC_RX_RXEN_; 2963 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2964 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2965 } 2966 2967 lan743x_csr_write(adapter, MAC_WUCSR, wucsr); 2968 lan743x_csr_write(adapter, PMT_CTL, pmtctl); 2969 lan743x_csr_write(adapter, MAC_RX, macrx); 2970 } 2971 2972 static int lan743x_pm_suspend(struct device *dev) 2973 { 2974 struct pci_dev *pdev = to_pci_dev(dev); 2975 struct net_device *netdev = pci_get_drvdata(pdev); 2976 struct lan743x_adapter *adapter = netdev_priv(netdev); 2977 int ret; 2978 2979 lan743x_pcidev_shutdown(pdev); 2980 2981 /* clear all wakes */ 2982 lan743x_csr_write(adapter, MAC_WUCSR, 0); 2983 lan743x_csr_write(adapter, MAC_WUCSR2, 0); 2984 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF); 2985 2986 if (adapter->wolopts) 2987 lan743x_pm_set_wol(adapter); 2988 2989 /* Host sets PME_En, put D3hot */ 2990 ret = pci_prepare_to_sleep(pdev); 2991 2992 return 0; 2993 } 2994 2995 static int lan743x_pm_resume(struct device *dev) 2996 { 2997 struct pci_dev *pdev = to_pci_dev(dev); 2998 struct net_device *netdev = pci_get_drvdata(pdev); 2999 struct lan743x_adapter *adapter = netdev_priv(netdev); 3000 int ret; 3001 3002 pci_set_power_state(pdev, PCI_D0); 3003 pci_restore_state(pdev); 3004 pci_save_state(pdev); 3005 3006 ret = lan743x_hardware_init(adapter, pdev); 3007 if (ret) { 3008 netif_err(adapter, probe, adapter->netdev, 3009 "lan743x_hardware_init returned %d\n", ret); 3010 } 3011 3012 /* open netdev when netdev is at running state while resume. 3013 * For instance, it is true when system wakesup after pm-suspend 3014 * However, it is false when system wakes up after suspend GUI menu 3015 */ 3016 if (netif_running(netdev)) 3017 lan743x_netdev_open(netdev); 3018 3019 netif_device_attach(netdev); 3020 3021 return 0; 3022 } 3023 3024 static const struct dev_pm_ops lan743x_pm_ops = { 3025 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume) 3026 }; 3027 #endif /* CONFIG_PM_SLEEP */ 3028 3029 static const struct pci_device_id lan743x_pcidev_tbl[] = { 3030 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) }, 3031 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) }, 3032 { 0, } 3033 }; 3034 3035 static struct pci_driver lan743x_pcidev_driver = { 3036 .name = DRIVER_NAME, 3037 .id_table = lan743x_pcidev_tbl, 3038 .probe = lan743x_pcidev_probe, 3039 .remove = lan743x_pcidev_remove, 3040 #ifdef CONFIG_PM_SLEEP 3041 .driver.pm = &lan743x_pm_ops, 3042 #endif 3043 .shutdown = lan743x_pcidev_shutdown, 3044 }; 3045 3046 module_pci_driver(lan743x_pcidev_driver); 3047 3048 MODULE_AUTHOR(DRIVER_AUTHOR); 3049 MODULE_DESCRIPTION(DRIVER_DESC); 3050 MODULE_LICENSE("GPL"); 3051