1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* Copyright (C) 2018 Microchip Technology Inc. */ 3 4 #include <linux/module.h> 5 #include <linux/pci.h> 6 #include <linux/netdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/crc32.h> 9 #include <linux/microchipphy.h> 10 #include <linux/net_tstamp.h> 11 #include <linux/of_mdio.h> 12 #include <linux/of_net.h> 13 #include <linux/phy.h> 14 #include <linux/phy_fixed.h> 15 #include <linux/rtnetlink.h> 16 #include <linux/iopoll.h> 17 #include <linux/crc16.h> 18 #include "lan743x_main.h" 19 #include "lan743x_ethtool.h" 20 21 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter) 22 { 23 pci_release_selected_regions(adapter->pdev, 24 pci_select_bars(adapter->pdev, 25 IORESOURCE_MEM)); 26 pci_disable_device(adapter->pdev); 27 } 28 29 static int lan743x_pci_init(struct lan743x_adapter *adapter, 30 struct pci_dev *pdev) 31 { 32 unsigned long bars = 0; 33 int ret; 34 35 adapter->pdev = pdev; 36 ret = pci_enable_device_mem(pdev); 37 if (ret) 38 goto return_error; 39 40 netif_info(adapter, probe, adapter->netdev, 41 "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n", 42 pdev->vendor, pdev->device); 43 bars = pci_select_bars(pdev, IORESOURCE_MEM); 44 if (!test_bit(0, &bars)) 45 goto disable_device; 46 47 ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME); 48 if (ret) 49 goto disable_device; 50 51 pci_set_master(pdev); 52 return 0; 53 54 disable_device: 55 pci_disable_device(adapter->pdev); 56 57 return_error: 58 return ret; 59 } 60 61 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset) 62 { 63 return ioread32(&adapter->csr.csr_address[offset]); 64 } 65 66 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset, 67 u32 data) 68 { 69 iowrite32(data, &adapter->csr.csr_address[offset]); 70 } 71 72 #define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset) 73 74 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter) 75 { 76 u32 data; 77 78 data = lan743x_csr_read(adapter, HW_CFG); 79 data |= HW_CFG_LRST_; 80 lan743x_csr_write(adapter, HW_CFG, data); 81 82 return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data, 83 !(data & HW_CFG_LRST_), 100000, 10000000); 84 } 85 86 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter, 87 int offset, u32 bit_mask, 88 int target_value, int usleep_min, 89 int usleep_max, int count) 90 { 91 u32 data; 92 93 return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data, 94 target_value == ((data & bit_mask) ? 1 : 0), 95 usleep_max, usleep_min * count); 96 } 97 98 static int lan743x_csr_init(struct lan743x_adapter *adapter) 99 { 100 struct lan743x_csr *csr = &adapter->csr; 101 resource_size_t bar_start, bar_length; 102 int result; 103 104 bar_start = pci_resource_start(adapter->pdev, 0); 105 bar_length = pci_resource_len(adapter->pdev, 0); 106 csr->csr_address = devm_ioremap(&adapter->pdev->dev, 107 bar_start, bar_length); 108 if (!csr->csr_address) { 109 result = -ENOMEM; 110 goto clean_up; 111 } 112 113 csr->id_rev = lan743x_csr_read(adapter, ID_REV); 114 csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV); 115 netif_info(adapter, probe, adapter->netdev, 116 "ID_REV = 0x%08X, FPGA_REV = %d.%d\n", 117 csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev), 118 FPGA_REV_GET_MINOR_(csr->fpga_rev)); 119 if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) { 120 result = -ENODEV; 121 goto clean_up; 122 } 123 124 csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR; 125 switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) { 126 case ID_REV_CHIP_REV_A0_: 127 csr->flags |= LAN743X_CSR_FLAG_IS_A0; 128 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR; 129 break; 130 case ID_REV_CHIP_REV_B0_: 131 csr->flags |= LAN743X_CSR_FLAG_IS_B0; 132 break; 133 } 134 135 result = lan743x_csr_light_reset(adapter); 136 if (result) 137 goto clean_up; 138 return 0; 139 clean_up: 140 return result; 141 } 142 143 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter) 144 { 145 struct lan743x_intr *intr = &adapter->intr; 146 147 /* disable the interrupt to prevent repeated re-triggering */ 148 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_); 149 intr->software_isr_flag = true; 150 wake_up(&intr->software_isr_wq); 151 } 152 153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags) 154 { 155 struct lan743x_tx *tx = context; 156 struct lan743x_adapter *adapter = tx->adapter; 157 bool enable_flag = true; 158 159 lan743x_csr_read(adapter, INT_EN_SET); 160 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) { 161 lan743x_csr_write(adapter, INT_EN_CLR, 162 INT_BIT_DMA_TX_(tx->channel_number)); 163 } 164 165 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) { 166 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number); 167 u32 dmac_int_sts; 168 u32 dmac_int_en; 169 170 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) 171 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS); 172 else 173 dmac_int_sts = ioc_bit; 174 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) 175 dmac_int_en = lan743x_csr_read(adapter, 176 DMAC_INT_EN_SET); 177 else 178 dmac_int_en = ioc_bit; 179 180 dmac_int_en &= ioc_bit; 181 dmac_int_sts &= dmac_int_en; 182 if (dmac_int_sts & ioc_bit) { 183 napi_schedule(&tx->napi); 184 enable_flag = false;/* poll func will enable later */ 185 } 186 } 187 188 if (enable_flag) 189 /* enable isr */ 190 lan743x_csr_write(adapter, INT_EN_SET, 191 INT_BIT_DMA_TX_(tx->channel_number)); 192 } 193 194 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags) 195 { 196 struct lan743x_rx *rx = context; 197 struct lan743x_adapter *adapter = rx->adapter; 198 bool enable_flag = true; 199 200 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) { 201 lan743x_csr_write(adapter, INT_EN_CLR, 202 INT_BIT_DMA_RX_(rx->channel_number)); 203 } 204 205 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) { 206 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number); 207 u32 dmac_int_sts; 208 u32 dmac_int_en; 209 210 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) 211 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS); 212 else 213 dmac_int_sts = rx_frame_bit; 214 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) 215 dmac_int_en = lan743x_csr_read(adapter, 216 DMAC_INT_EN_SET); 217 else 218 dmac_int_en = rx_frame_bit; 219 220 dmac_int_en &= rx_frame_bit; 221 dmac_int_sts &= dmac_int_en; 222 if (dmac_int_sts & rx_frame_bit) { 223 napi_schedule(&rx->napi); 224 enable_flag = false;/* poll funct will enable later */ 225 } 226 } 227 228 if (enable_flag) { 229 /* enable isr */ 230 lan743x_csr_write(adapter, INT_EN_SET, 231 INT_BIT_DMA_RX_(rx->channel_number)); 232 } 233 } 234 235 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags) 236 { 237 struct lan743x_adapter *adapter = context; 238 unsigned int channel; 239 240 if (int_sts & INT_BIT_ALL_RX_) { 241 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS; 242 channel++) { 243 u32 int_bit = INT_BIT_DMA_RX_(channel); 244 245 if (int_sts & int_bit) { 246 lan743x_rx_isr(&adapter->rx[channel], 247 int_bit, flags); 248 int_sts &= ~int_bit; 249 } 250 } 251 } 252 if (int_sts & INT_BIT_ALL_TX_) { 253 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS; 254 channel++) { 255 u32 int_bit = INT_BIT_DMA_TX_(channel); 256 257 if (int_sts & int_bit) { 258 lan743x_tx_isr(&adapter->tx[channel], 259 int_bit, flags); 260 int_sts &= ~int_bit; 261 } 262 } 263 } 264 if (int_sts & INT_BIT_ALL_OTHER_) { 265 if (int_sts & INT_BIT_SW_GP_) { 266 lan743x_intr_software_isr(adapter); 267 int_sts &= ~INT_BIT_SW_GP_; 268 } 269 if (int_sts & INT_BIT_1588_) { 270 lan743x_ptp_isr(adapter); 271 int_sts &= ~INT_BIT_1588_; 272 } 273 } 274 if (int_sts) 275 lan743x_csr_write(adapter, INT_EN_CLR, int_sts); 276 } 277 278 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr) 279 { 280 struct lan743x_vector *vector = ptr; 281 struct lan743x_adapter *adapter = vector->adapter; 282 irqreturn_t result = IRQ_NONE; 283 u32 int_enables; 284 u32 int_sts; 285 286 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) { 287 int_sts = lan743x_csr_read(adapter, INT_STS); 288 } else if (vector->flags & 289 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C | 290 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) { 291 int_sts = lan743x_csr_read(adapter, INT_STS_R2C); 292 } else { 293 /* use mask as implied status */ 294 int_sts = vector->int_mask | INT_BIT_MAS_; 295 } 296 297 if (!(int_sts & INT_BIT_MAS_)) 298 goto irq_done; 299 300 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR) 301 /* disable vector interrupt */ 302 lan743x_csr_write(adapter, 303 INT_VEC_EN_CLR, 304 INT_VEC_EN_(vector->vector_index)); 305 306 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR) 307 /* disable master interrupt */ 308 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_); 309 310 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) { 311 int_enables = lan743x_csr_read(adapter, INT_EN_SET); 312 } else { 313 /* use vector mask as implied enable mask */ 314 int_enables = vector->int_mask; 315 } 316 317 int_sts &= int_enables; 318 int_sts &= vector->int_mask; 319 if (int_sts) { 320 if (vector->handler) { 321 vector->handler(vector->context, 322 int_sts, vector->flags); 323 } else { 324 /* disable interrupts on this vector */ 325 lan743x_csr_write(adapter, INT_EN_CLR, 326 vector->int_mask); 327 } 328 result = IRQ_HANDLED; 329 } 330 331 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET) 332 /* enable master interrupt */ 333 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_); 334 335 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET) 336 /* enable vector interrupt */ 337 lan743x_csr_write(adapter, 338 INT_VEC_EN_SET, 339 INT_VEC_EN_(vector->vector_index)); 340 irq_done: 341 return result; 342 } 343 344 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter) 345 { 346 struct lan743x_intr *intr = &adapter->intr; 347 int ret; 348 349 intr->software_isr_flag = false; 350 351 /* enable and activate test interrupt */ 352 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_); 353 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_); 354 355 ret = wait_event_timeout(intr->software_isr_wq, 356 intr->software_isr_flag, 357 msecs_to_jiffies(200)); 358 359 /* disable test interrupt */ 360 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_); 361 362 return ret > 0 ? 0 : -ENODEV; 363 } 364 365 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter, 366 int vector_index, u32 flags, 367 u32 int_mask, 368 lan743x_vector_handler handler, 369 void *context) 370 { 371 struct lan743x_vector *vector = &adapter->intr.vector_list 372 [vector_index]; 373 int ret; 374 375 vector->adapter = adapter; 376 vector->flags = flags; 377 vector->vector_index = vector_index; 378 vector->int_mask = int_mask; 379 vector->handler = handler; 380 vector->context = context; 381 382 ret = request_irq(vector->irq, 383 lan743x_intr_entry_isr, 384 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ? 385 IRQF_SHARED : 0, DRIVER_NAME, vector); 386 if (ret) { 387 vector->handler = NULL; 388 vector->context = NULL; 389 vector->int_mask = 0; 390 vector->flags = 0; 391 } 392 return ret; 393 } 394 395 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter, 396 int vector_index) 397 { 398 struct lan743x_vector *vector = &adapter->intr.vector_list 399 [vector_index]; 400 401 free_irq(vector->irq, vector); 402 vector->handler = NULL; 403 vector->context = NULL; 404 vector->int_mask = 0; 405 vector->flags = 0; 406 } 407 408 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter, 409 u32 int_mask) 410 { 411 int index; 412 413 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) { 414 if (adapter->intr.vector_list[index].int_mask & int_mask) 415 return adapter->intr.vector_list[index].flags; 416 } 417 return 0; 418 } 419 420 static void lan743x_intr_close(struct lan743x_adapter *adapter) 421 { 422 struct lan743x_intr *intr = &adapter->intr; 423 int index = 0; 424 425 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_); 426 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF); 427 428 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) { 429 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) { 430 lan743x_intr_unregister_isr(adapter, index); 431 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index); 432 } 433 } 434 435 if (intr->flags & INTR_FLAG_MSI_ENABLED) { 436 pci_disable_msi(adapter->pdev); 437 intr->flags &= ~INTR_FLAG_MSI_ENABLED; 438 } 439 440 if (intr->flags & INTR_FLAG_MSIX_ENABLED) { 441 pci_disable_msix(adapter->pdev); 442 intr->flags &= ~INTR_FLAG_MSIX_ENABLED; 443 } 444 } 445 446 static int lan743x_intr_open(struct lan743x_adapter *adapter) 447 { 448 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT]; 449 struct lan743x_intr *intr = &adapter->intr; 450 u32 int_vec_en_auto_clr = 0; 451 u32 int_vec_map0 = 0; 452 u32 int_vec_map1 = 0; 453 int ret = -ENODEV; 454 int index = 0; 455 u32 flags = 0; 456 457 intr->number_of_vectors = 0; 458 459 /* Try to set up MSIX interrupts */ 460 memset(&msix_entries[0], 0, 461 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT); 462 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) 463 msix_entries[index].entry = index; 464 ret = pci_enable_msix_range(adapter->pdev, 465 msix_entries, 1, 466 1 + LAN743X_USED_TX_CHANNELS + 467 LAN743X_USED_RX_CHANNELS); 468 469 if (ret > 0) { 470 intr->flags |= INTR_FLAG_MSIX_ENABLED; 471 intr->number_of_vectors = ret; 472 intr->using_vectors = true; 473 for (index = 0; index < intr->number_of_vectors; index++) 474 intr->vector_list[index].irq = msix_entries 475 [index].vector; 476 netif_info(adapter, ifup, adapter->netdev, 477 "using MSIX interrupts, number of vectors = %d\n", 478 intr->number_of_vectors); 479 } 480 481 /* If MSIX failed try to setup using MSI interrupts */ 482 if (!intr->number_of_vectors) { 483 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 484 if (!pci_enable_msi(adapter->pdev)) { 485 intr->flags |= INTR_FLAG_MSI_ENABLED; 486 intr->number_of_vectors = 1; 487 intr->using_vectors = true; 488 intr->vector_list[0].irq = 489 adapter->pdev->irq; 490 netif_info(adapter, ifup, adapter->netdev, 491 "using MSI interrupts, number of vectors = %d\n", 492 intr->number_of_vectors); 493 } 494 } 495 } 496 497 /* If MSIX, and MSI failed, setup using legacy interrupt */ 498 if (!intr->number_of_vectors) { 499 intr->number_of_vectors = 1; 500 intr->using_vectors = false; 501 intr->vector_list[0].irq = intr->irq; 502 netif_info(adapter, ifup, adapter->netdev, 503 "using legacy interrupts\n"); 504 } 505 506 /* At this point we must have at least one irq */ 507 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF); 508 509 /* map all interrupts to vector 0 */ 510 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000); 511 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000); 512 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000); 513 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ | 514 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C | 515 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK | 516 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR; 517 518 if (intr->using_vectors) { 519 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR | 520 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET; 521 } else { 522 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR | 523 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET | 524 LAN743X_VECTOR_FLAG_IRQ_SHARED; 525 } 526 527 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) { 528 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ; 529 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C; 530 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR; 531 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK; 532 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C; 533 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C; 534 } 535 536 init_waitqueue_head(&intr->software_isr_wq); 537 538 ret = lan743x_intr_register_isr(adapter, 0, flags, 539 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ | 540 INT_BIT_ALL_OTHER_, 541 lan743x_intr_shared_isr, adapter); 542 if (ret) 543 goto clean_up; 544 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0); 545 546 if (intr->using_vectors) 547 lan743x_csr_write(adapter, INT_VEC_EN_SET, 548 INT_VEC_EN_(0)); 549 550 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 551 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD); 552 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD); 553 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD); 554 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD); 555 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD); 556 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD); 557 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD); 558 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD); 559 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432); 560 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001); 561 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF); 562 } 563 564 /* enable interrupts */ 565 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_); 566 ret = lan743x_intr_test_isr(adapter); 567 if (ret) 568 goto clean_up; 569 570 if (intr->number_of_vectors > 1) { 571 int number_of_tx_vectors = intr->number_of_vectors - 1; 572 573 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS) 574 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS; 575 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ | 576 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C | 577 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK | 578 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR | 579 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR | 580 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET; 581 582 if (adapter->csr.flags & 583 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) { 584 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET | 585 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET | 586 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR | 587 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR; 588 } 589 590 for (index = 0; index < number_of_tx_vectors; index++) { 591 u32 int_bit = INT_BIT_DMA_TX_(index); 592 int vector = index + 1; 593 594 /* map TX interrupt to vector */ 595 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector); 596 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1); 597 598 /* Remove TX interrupt from shared mask */ 599 intr->vector_list[0].int_mask &= ~int_bit; 600 ret = lan743x_intr_register_isr(adapter, vector, flags, 601 int_bit, lan743x_tx_isr, 602 &adapter->tx[index]); 603 if (ret) 604 goto clean_up; 605 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector); 606 if (!(flags & 607 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)) 608 lan743x_csr_write(adapter, INT_VEC_EN_SET, 609 INT_VEC_EN_(vector)); 610 } 611 } 612 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) { 613 int number_of_rx_vectors = intr->number_of_vectors - 614 LAN743X_USED_TX_CHANNELS - 1; 615 616 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS) 617 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS; 618 619 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ | 620 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C | 621 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK | 622 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR | 623 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR | 624 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET; 625 626 if (adapter->csr.flags & 627 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) { 628 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR | 629 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET | 630 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET | 631 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR | 632 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR; 633 } 634 for (index = 0; index < number_of_rx_vectors; index++) { 635 int vector = index + 1 + LAN743X_USED_TX_CHANNELS; 636 u32 int_bit = INT_BIT_DMA_RX_(index); 637 638 /* map RX interrupt to vector */ 639 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector); 640 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0); 641 if (flags & 642 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) { 643 int_vec_en_auto_clr |= INT_VEC_EN_(vector); 644 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR, 645 int_vec_en_auto_clr); 646 } 647 648 /* Remove RX interrupt from shared mask */ 649 intr->vector_list[0].int_mask &= ~int_bit; 650 ret = lan743x_intr_register_isr(adapter, vector, flags, 651 int_bit, lan743x_rx_isr, 652 &adapter->rx[index]); 653 if (ret) 654 goto clean_up; 655 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector); 656 657 lan743x_csr_write(adapter, INT_VEC_EN_SET, 658 INT_VEC_EN_(vector)); 659 } 660 } 661 return 0; 662 663 clean_up: 664 lan743x_intr_close(adapter); 665 return ret; 666 } 667 668 static int lan743x_dp_write(struct lan743x_adapter *adapter, 669 u32 select, u32 addr, u32 length, u32 *buf) 670 { 671 u32 dp_sel; 672 int i; 673 674 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_, 675 1, 40, 100, 100)) 676 return -EIO; 677 dp_sel = lan743x_csr_read(adapter, DP_SEL); 678 dp_sel &= ~DP_SEL_MASK_; 679 dp_sel |= select; 680 lan743x_csr_write(adapter, DP_SEL, dp_sel); 681 682 for (i = 0; i < length; i++) { 683 lan743x_csr_write(adapter, DP_ADDR, addr + i); 684 lan743x_csr_write(adapter, DP_DATA_0, buf[i]); 685 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_); 686 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_, 687 1, 40, 100, 100)) 688 return -EIO; 689 } 690 691 return 0; 692 } 693 694 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read) 695 { 696 u32 ret; 697 698 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) & 699 MAC_MII_ACC_PHY_ADDR_MASK_; 700 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) & 701 MAC_MII_ACC_MIIRINDA_MASK_; 702 703 if (read) 704 ret |= MAC_MII_ACC_MII_READ_; 705 else 706 ret |= MAC_MII_ACC_MII_WRITE_; 707 ret |= MAC_MII_ACC_MII_BUSY_; 708 709 return ret; 710 } 711 712 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter) 713 { 714 u32 data; 715 716 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data, 717 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000); 718 } 719 720 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index) 721 { 722 struct lan743x_adapter *adapter = bus->priv; 723 u32 val, mii_access; 724 int ret; 725 726 /* comfirm MII not busy */ 727 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 728 if (ret < 0) 729 return ret; 730 731 /* set the address, index & direction (read from PHY) */ 732 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ); 733 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access); 734 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 735 if (ret < 0) 736 return ret; 737 738 val = lan743x_csr_read(adapter, MAC_MII_DATA); 739 return (int)(val & 0xFFFF); 740 } 741 742 static int lan743x_mdiobus_write(struct mii_bus *bus, 743 int phy_id, int index, u16 regval) 744 { 745 struct lan743x_adapter *adapter = bus->priv; 746 u32 val, mii_access; 747 int ret; 748 749 /* confirm MII not busy */ 750 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 751 if (ret < 0) 752 return ret; 753 val = (u32)regval; 754 lan743x_csr_write(adapter, MAC_MII_DATA, val); 755 756 /* set the address, index & direction (write to PHY) */ 757 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE); 758 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access); 759 ret = lan743x_mac_mii_wait_till_not_busy(adapter); 760 return ret; 761 } 762 763 static void lan743x_mac_set_address(struct lan743x_adapter *adapter, 764 u8 *addr) 765 { 766 u32 addr_lo, addr_hi; 767 768 addr_lo = addr[0] | 769 addr[1] << 8 | 770 addr[2] << 16 | 771 addr[3] << 24; 772 addr_hi = addr[4] | 773 addr[5] << 8; 774 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo); 775 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi); 776 777 ether_addr_copy(adapter->mac_address, addr); 778 netif_info(adapter, drv, adapter->netdev, 779 "MAC address set to %pM\n", addr); 780 } 781 782 static int lan743x_mac_init(struct lan743x_adapter *adapter) 783 { 784 bool mac_address_valid = true; 785 struct net_device *netdev; 786 u32 mac_addr_hi = 0; 787 u32 mac_addr_lo = 0; 788 u32 data; 789 790 netdev = adapter->netdev; 791 792 /* disable auto duplex, and speed detection. Phylib does that */ 793 data = lan743x_csr_read(adapter, MAC_CR); 794 data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_); 795 data |= MAC_CR_CNTR_RST_; 796 lan743x_csr_write(adapter, MAC_CR, data); 797 798 if (!is_valid_ether_addr(adapter->mac_address)) { 799 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH); 800 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL); 801 adapter->mac_address[0] = mac_addr_lo & 0xFF; 802 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF; 803 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF; 804 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF; 805 adapter->mac_address[4] = mac_addr_hi & 0xFF; 806 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF; 807 808 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) && 809 mac_addr_lo == 0xFFFFFFFF) { 810 mac_address_valid = false; 811 } else if (!is_valid_ether_addr(adapter->mac_address)) { 812 mac_address_valid = false; 813 } 814 815 if (!mac_address_valid) 816 eth_random_addr(adapter->mac_address); 817 } 818 lan743x_mac_set_address(adapter, adapter->mac_address); 819 eth_hw_addr_set(netdev, adapter->mac_address); 820 821 return 0; 822 } 823 824 static int lan743x_mac_open(struct lan743x_adapter *adapter) 825 { 826 u32 temp; 827 828 temp = lan743x_csr_read(adapter, MAC_RX); 829 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_); 830 temp = lan743x_csr_read(adapter, MAC_TX); 831 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_); 832 return 0; 833 } 834 835 static void lan743x_mac_close(struct lan743x_adapter *adapter) 836 { 837 u32 temp; 838 839 temp = lan743x_csr_read(adapter, MAC_TX); 840 temp &= ~MAC_TX_TXEN_; 841 lan743x_csr_write(adapter, MAC_TX, temp); 842 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_, 843 1, 1000, 20000, 100); 844 845 temp = lan743x_csr_read(adapter, MAC_RX); 846 temp &= ~MAC_RX_RXEN_; 847 lan743x_csr_write(adapter, MAC_RX, temp); 848 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_, 849 1, 1000, 20000, 100); 850 } 851 852 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter, 853 bool tx_enable, bool rx_enable) 854 { 855 u32 flow_setting = 0; 856 857 /* set maximum pause time because when fifo space frees 858 * up a zero value pause frame will be sent to release the pause 859 */ 860 flow_setting = MAC_FLOW_CR_FCPT_MASK_; 861 if (tx_enable) 862 flow_setting |= MAC_FLOW_CR_TX_FCEN_; 863 if (rx_enable) 864 flow_setting |= MAC_FLOW_CR_RX_FCEN_; 865 lan743x_csr_write(adapter, MAC_FLOW, flow_setting); 866 } 867 868 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu) 869 { 870 int enabled = 0; 871 u32 mac_rx = 0; 872 873 mac_rx = lan743x_csr_read(adapter, MAC_RX); 874 if (mac_rx & MAC_RX_RXEN_) { 875 enabled = 1; 876 if (mac_rx & MAC_RX_RXD_) { 877 lan743x_csr_write(adapter, MAC_RX, mac_rx); 878 mac_rx &= ~MAC_RX_RXD_; 879 } 880 mac_rx &= ~MAC_RX_RXEN_; 881 lan743x_csr_write(adapter, MAC_RX, mac_rx); 882 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_, 883 1, 1000, 20000, 100); 884 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_); 885 } 886 887 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_); 888 mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN) 889 << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_); 890 lan743x_csr_write(adapter, MAC_RX, mac_rx); 891 892 if (enabled) { 893 mac_rx |= MAC_RX_RXEN_; 894 lan743x_csr_write(adapter, MAC_RX, mac_rx); 895 } 896 return 0; 897 } 898 899 /* PHY */ 900 static int lan743x_phy_reset(struct lan743x_adapter *adapter) 901 { 902 u32 data; 903 904 /* Only called with in probe, and before mdiobus_register */ 905 906 data = lan743x_csr_read(adapter, PMT_CTL); 907 data |= PMT_CTL_ETH_PHY_RST_; 908 lan743x_csr_write(adapter, PMT_CTL, data); 909 910 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data, 911 (!(data & PMT_CTL_ETH_PHY_RST_) && 912 (data & PMT_CTL_READY_)), 913 50000, 1000000); 914 } 915 916 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter, 917 u16 local_adv, u16 remote_adv) 918 { 919 struct lan743x_phy *phy = &adapter->phy; 920 u8 cap; 921 922 if (phy->fc_autoneg) 923 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv); 924 else 925 cap = phy->fc_request_control; 926 927 lan743x_mac_flow_ctrl_set_enables(adapter, 928 cap & FLOW_CTRL_TX, 929 cap & FLOW_CTRL_RX); 930 } 931 932 static int lan743x_phy_init(struct lan743x_adapter *adapter) 933 { 934 return lan743x_phy_reset(adapter); 935 } 936 937 static void lan743x_phy_link_status_change(struct net_device *netdev) 938 { 939 struct lan743x_adapter *adapter = netdev_priv(netdev); 940 struct phy_device *phydev = netdev->phydev; 941 u32 data; 942 943 phy_print_status(phydev); 944 if (phydev->state == PHY_RUNNING) { 945 int remote_advertisement = 0; 946 int local_advertisement = 0; 947 948 data = lan743x_csr_read(adapter, MAC_CR); 949 950 /* set interface mode */ 951 if (phy_interface_is_rgmii(phydev)) 952 /* RGMII */ 953 data &= ~MAC_CR_MII_EN_; 954 else 955 /* GMII */ 956 data |= MAC_CR_MII_EN_; 957 958 /* set duplex mode */ 959 if (phydev->duplex) 960 data |= MAC_CR_DPX_; 961 else 962 data &= ~MAC_CR_DPX_; 963 964 /* set bus speed */ 965 switch (phydev->speed) { 966 case SPEED_10: 967 data &= ~MAC_CR_CFG_H_; 968 data &= ~MAC_CR_CFG_L_; 969 break; 970 case SPEED_100: 971 data &= ~MAC_CR_CFG_H_; 972 data |= MAC_CR_CFG_L_; 973 break; 974 case SPEED_1000: 975 data |= MAC_CR_CFG_H_; 976 data &= ~MAC_CR_CFG_L_; 977 break; 978 } 979 lan743x_csr_write(adapter, MAC_CR, data); 980 981 local_advertisement = 982 linkmode_adv_to_mii_adv_t(phydev->advertising); 983 remote_advertisement = 984 linkmode_adv_to_mii_adv_t(phydev->lp_advertising); 985 986 lan743x_phy_update_flowcontrol(adapter, local_advertisement, 987 remote_advertisement); 988 lan743x_ptp_update_latency(adapter, phydev->speed); 989 } 990 } 991 992 static void lan743x_phy_close(struct lan743x_adapter *adapter) 993 { 994 struct net_device *netdev = adapter->netdev; 995 996 phy_stop(netdev->phydev); 997 phy_disconnect(netdev->phydev); 998 netdev->phydev = NULL; 999 } 1000 1001 static int lan743x_phy_open(struct lan743x_adapter *adapter) 1002 { 1003 struct net_device *netdev = adapter->netdev; 1004 struct lan743x_phy *phy = &adapter->phy; 1005 struct phy_device *phydev; 1006 int ret = -EIO; 1007 1008 /* try devicetree phy, or fixed link */ 1009 phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node, 1010 lan743x_phy_link_status_change); 1011 1012 if (!phydev) { 1013 /* try internal phy */ 1014 phydev = phy_find_first(adapter->mdiobus); 1015 if (!phydev) 1016 goto return_error; 1017 1018 ret = phy_connect_direct(netdev, phydev, 1019 lan743x_phy_link_status_change, 1020 PHY_INTERFACE_MODE_GMII); 1021 if (ret) 1022 goto return_error; 1023 } 1024 1025 /* MAC doesn't support 1000T Half */ 1026 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); 1027 1028 /* support both flow controls */ 1029 phy_support_asym_pause(phydev); 1030 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX); 1031 phy->fc_autoneg = phydev->autoneg; 1032 1033 phy_start(phydev); 1034 phy_start_aneg(phydev); 1035 phy_attached_info(phydev); 1036 return 0; 1037 1038 return_error: 1039 return ret; 1040 } 1041 1042 static void lan743x_rfe_open(struct lan743x_adapter *adapter) 1043 { 1044 lan743x_csr_write(adapter, RFE_RSS_CFG, 1045 RFE_RSS_CFG_UDP_IPV6_EX_ | 1046 RFE_RSS_CFG_TCP_IPV6_EX_ | 1047 RFE_RSS_CFG_IPV6_EX_ | 1048 RFE_RSS_CFG_UDP_IPV6_ | 1049 RFE_RSS_CFG_TCP_IPV6_ | 1050 RFE_RSS_CFG_IPV6_ | 1051 RFE_RSS_CFG_UDP_IPV4_ | 1052 RFE_RSS_CFG_TCP_IPV4_ | 1053 RFE_RSS_CFG_IPV4_ | 1054 RFE_RSS_CFG_VALID_HASH_BITS_ | 1055 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ | 1056 RFE_RSS_CFG_RSS_HASH_STORE_ | 1057 RFE_RSS_CFG_RSS_ENABLE_); 1058 } 1059 1060 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter) 1061 { 1062 u8 *mac_addr; 1063 u32 mac_addr_hi = 0; 1064 u32 mac_addr_lo = 0; 1065 1066 /* Add mac address to perfect Filter */ 1067 mac_addr = adapter->mac_address; 1068 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) | 1069 (((u32)(mac_addr[1])) << 8) | 1070 (((u32)(mac_addr[2])) << 16) | 1071 (((u32)(mac_addr[3])) << 24)); 1072 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) | 1073 (((u32)(mac_addr[5])) << 8)); 1074 1075 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo); 1076 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0), 1077 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_); 1078 } 1079 1080 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter) 1081 { 1082 struct net_device *netdev = adapter->netdev; 1083 u32 hash_table[DP_SEL_VHF_HASH_LEN]; 1084 u32 rfctl; 1085 u32 data; 1086 1087 rfctl = lan743x_csr_read(adapter, RFE_CTL); 1088 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ | 1089 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_); 1090 rfctl |= RFE_CTL_AB_; 1091 if (netdev->flags & IFF_PROMISC) { 1092 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_; 1093 } else { 1094 if (netdev->flags & IFF_ALLMULTI) 1095 rfctl |= RFE_CTL_AM_; 1096 } 1097 1098 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32)); 1099 if (netdev_mc_count(netdev)) { 1100 struct netdev_hw_addr *ha; 1101 int i; 1102 1103 rfctl |= RFE_CTL_DA_PERFECT_; 1104 i = 1; 1105 netdev_for_each_mc_addr(ha, netdev) { 1106 /* set first 32 into Perfect Filter */ 1107 if (i < 33) { 1108 lan743x_csr_write(adapter, 1109 RFE_ADDR_FILT_HI(i), 0); 1110 data = ha->addr[3]; 1111 data = ha->addr[2] | (data << 8); 1112 data = ha->addr[1] | (data << 8); 1113 data = ha->addr[0] | (data << 8); 1114 lan743x_csr_write(adapter, 1115 RFE_ADDR_FILT_LO(i), data); 1116 data = ha->addr[5]; 1117 data = ha->addr[4] | (data << 8); 1118 data |= RFE_ADDR_FILT_HI_VALID_; 1119 lan743x_csr_write(adapter, 1120 RFE_ADDR_FILT_HI(i), data); 1121 } else { 1122 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >> 1123 23) & 0x1FF; 1124 hash_table[bitnum / 32] |= (1 << (bitnum % 32)); 1125 rfctl |= RFE_CTL_MCAST_HASH_; 1126 } 1127 i++; 1128 } 1129 } 1130 1131 lan743x_dp_write(adapter, DP_SEL_RFE_RAM, 1132 DP_SEL_VHF_VLAN_LEN, 1133 DP_SEL_VHF_HASH_LEN, hash_table); 1134 lan743x_csr_write(adapter, RFE_CTL, rfctl); 1135 } 1136 1137 static int lan743x_dmac_init(struct lan743x_adapter *adapter) 1138 { 1139 u32 data = 0; 1140 1141 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_); 1142 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_, 1143 0, 1000, 20000, 100); 1144 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) { 1145 case DMA_DESCRIPTOR_SPACING_16: 1146 data = DMAC_CFG_MAX_DSPACE_16_; 1147 break; 1148 case DMA_DESCRIPTOR_SPACING_32: 1149 data = DMAC_CFG_MAX_DSPACE_32_; 1150 break; 1151 case DMA_DESCRIPTOR_SPACING_64: 1152 data = DMAC_CFG_MAX_DSPACE_64_; 1153 break; 1154 case DMA_DESCRIPTOR_SPACING_128: 1155 data = DMAC_CFG_MAX_DSPACE_128_; 1156 break; 1157 default: 1158 return -EPERM; 1159 } 1160 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) 1161 data |= DMAC_CFG_COAL_EN_; 1162 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_; 1163 data |= DMAC_CFG_MAX_READ_REQ_SET_(6); 1164 lan743x_csr_write(adapter, DMAC_CFG, data); 1165 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1); 1166 data |= DMAC_COAL_CFG_TIMER_TX_START_; 1167 data |= DMAC_COAL_CFG_FLUSH_INTS_; 1168 data |= DMAC_COAL_CFG_INT_EXIT_COAL_; 1169 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_; 1170 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A); 1171 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C); 1172 lan743x_csr_write(adapter, DMAC_COAL_CFG, data); 1173 data = DMAC_OBFF_TX_THRES_SET_(0x08); 1174 data |= DMAC_OBFF_RX_THRES_SET_(0x0A); 1175 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data); 1176 return 0; 1177 } 1178 1179 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter, 1180 int tx_channel) 1181 { 1182 u32 dmac_cmd = 0; 1183 1184 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD); 1185 return DMAC_CHANNEL_STATE_SET((dmac_cmd & 1186 DMAC_CMD_START_T_(tx_channel)), 1187 (dmac_cmd & 1188 DMAC_CMD_STOP_T_(tx_channel))); 1189 } 1190 1191 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter, 1192 int tx_channel) 1193 { 1194 int timeout = 100; 1195 int result = 0; 1196 1197 while (timeout && 1198 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) == 1199 DMAC_CHANNEL_STATE_STOP_PENDING)) { 1200 usleep_range(1000, 20000); 1201 timeout--; 1202 } 1203 if (result == DMAC_CHANNEL_STATE_STOP_PENDING) 1204 result = -ENODEV; 1205 return result; 1206 } 1207 1208 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter, 1209 int rx_channel) 1210 { 1211 u32 dmac_cmd = 0; 1212 1213 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD); 1214 return DMAC_CHANNEL_STATE_SET((dmac_cmd & 1215 DMAC_CMD_START_R_(rx_channel)), 1216 (dmac_cmd & 1217 DMAC_CMD_STOP_R_(rx_channel))); 1218 } 1219 1220 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter, 1221 int rx_channel) 1222 { 1223 int timeout = 100; 1224 int result = 0; 1225 1226 while (timeout && 1227 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) == 1228 DMAC_CHANNEL_STATE_STOP_PENDING)) { 1229 usleep_range(1000, 20000); 1230 timeout--; 1231 } 1232 if (result == DMAC_CHANNEL_STATE_STOP_PENDING) 1233 result = -ENODEV; 1234 return result; 1235 } 1236 1237 static void lan743x_tx_release_desc(struct lan743x_tx *tx, 1238 int descriptor_index, bool cleanup) 1239 { 1240 struct lan743x_tx_buffer_info *buffer_info = NULL; 1241 struct lan743x_tx_descriptor *descriptor = NULL; 1242 u32 descriptor_type = 0; 1243 bool ignore_sync; 1244 1245 descriptor = &tx->ring_cpu_ptr[descriptor_index]; 1246 buffer_info = &tx->buffer_info[descriptor_index]; 1247 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE)) 1248 goto done; 1249 1250 descriptor_type = le32_to_cpu(descriptor->data0) & 1251 TX_DESC_DATA0_DTYPE_MASK_; 1252 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_) 1253 goto clean_up_data_descriptor; 1254 else 1255 goto clear_active; 1256 1257 clean_up_data_descriptor: 1258 if (buffer_info->dma_ptr) { 1259 if (buffer_info->flags & 1260 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) { 1261 dma_unmap_page(&tx->adapter->pdev->dev, 1262 buffer_info->dma_ptr, 1263 buffer_info->buffer_length, 1264 DMA_TO_DEVICE); 1265 } else { 1266 dma_unmap_single(&tx->adapter->pdev->dev, 1267 buffer_info->dma_ptr, 1268 buffer_info->buffer_length, 1269 DMA_TO_DEVICE); 1270 } 1271 buffer_info->dma_ptr = 0; 1272 buffer_info->buffer_length = 0; 1273 } 1274 if (!buffer_info->skb) 1275 goto clear_active; 1276 1277 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) { 1278 dev_kfree_skb_any(buffer_info->skb); 1279 goto clear_skb; 1280 } 1281 1282 if (cleanup) { 1283 lan743x_ptp_unrequest_tx_timestamp(tx->adapter); 1284 dev_kfree_skb_any(buffer_info->skb); 1285 } else { 1286 ignore_sync = (buffer_info->flags & 1287 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0; 1288 lan743x_ptp_tx_timestamp_skb(tx->adapter, 1289 buffer_info->skb, ignore_sync); 1290 } 1291 1292 clear_skb: 1293 buffer_info->skb = NULL; 1294 1295 clear_active: 1296 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE; 1297 1298 done: 1299 memset(buffer_info, 0, sizeof(*buffer_info)); 1300 memset(descriptor, 0, sizeof(*descriptor)); 1301 } 1302 1303 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index) 1304 { 1305 return ((++index) % tx->ring_size); 1306 } 1307 1308 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx) 1309 { 1310 while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) { 1311 lan743x_tx_release_desc(tx, tx->last_head, false); 1312 tx->last_head = lan743x_tx_next_index(tx, tx->last_head); 1313 } 1314 } 1315 1316 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx) 1317 { 1318 u32 original_head = 0; 1319 1320 original_head = tx->last_head; 1321 do { 1322 lan743x_tx_release_desc(tx, tx->last_head, true); 1323 tx->last_head = lan743x_tx_next_index(tx, tx->last_head); 1324 } while (tx->last_head != original_head); 1325 memset(tx->ring_cpu_ptr, 0, 1326 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size)); 1327 memset(tx->buffer_info, 0, 1328 sizeof(*tx->buffer_info) * (tx->ring_size)); 1329 } 1330 1331 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx, 1332 struct sk_buff *skb) 1333 { 1334 int result = 1; /* 1 for the main skb buffer */ 1335 int nr_frags = 0; 1336 1337 if (skb_is_gso(skb)) 1338 result++; /* requires an extension descriptor */ 1339 nr_frags = skb_shinfo(skb)->nr_frags; 1340 result += nr_frags; /* 1 for each fragment buffer */ 1341 return result; 1342 } 1343 1344 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx) 1345 { 1346 int last_head = tx->last_head; 1347 int last_tail = tx->last_tail; 1348 1349 if (last_tail >= last_head) 1350 return tx->ring_size - last_tail + last_head - 1; 1351 else 1352 return last_head - last_tail - 1; 1353 } 1354 1355 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx, 1356 bool enable_timestamping, 1357 bool enable_onestep_sync) 1358 { 1359 if (enable_timestamping) 1360 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED; 1361 else 1362 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED; 1363 if (enable_onestep_sync) 1364 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC; 1365 else 1366 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC; 1367 } 1368 1369 static int lan743x_tx_frame_start(struct lan743x_tx *tx, 1370 unsigned char *first_buffer, 1371 unsigned int first_buffer_length, 1372 unsigned int frame_length, 1373 bool time_stamp, 1374 bool check_sum) 1375 { 1376 /* called only from within lan743x_tx_xmit_frame. 1377 * assuming tx->ring_lock has already been acquired. 1378 */ 1379 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1380 struct lan743x_tx_buffer_info *buffer_info = NULL; 1381 struct lan743x_adapter *adapter = tx->adapter; 1382 struct device *dev = &adapter->pdev->dev; 1383 dma_addr_t dma_ptr; 1384 1385 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS; 1386 tx->frame_first = tx->last_tail; 1387 tx->frame_tail = tx->frame_first; 1388 1389 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1390 buffer_info = &tx->buffer_info[tx->frame_tail]; 1391 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length, 1392 DMA_TO_DEVICE); 1393 if (dma_mapping_error(dev, dma_ptr)) 1394 return -ENOMEM; 1395 1396 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr)); 1397 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr)); 1398 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) & 1399 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_); 1400 1401 buffer_info->skb = NULL; 1402 buffer_info->dma_ptr = dma_ptr; 1403 buffer_info->buffer_length = first_buffer_length; 1404 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE; 1405 1406 tx->frame_data0 = (first_buffer_length & 1407 TX_DESC_DATA0_BUF_LENGTH_MASK_) | 1408 TX_DESC_DATA0_DTYPE_DATA_ | 1409 TX_DESC_DATA0_FS_ | 1410 TX_DESC_DATA0_FCS_; 1411 if (time_stamp) 1412 tx->frame_data0 |= TX_DESC_DATA0_TSE_; 1413 1414 if (check_sum) 1415 tx->frame_data0 |= TX_DESC_DATA0_ICE_ | 1416 TX_DESC_DATA0_IPE_ | 1417 TX_DESC_DATA0_TPE_; 1418 1419 /* data0 will be programmed in one of other frame assembler functions */ 1420 return 0; 1421 } 1422 1423 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx, 1424 unsigned int frame_length, 1425 int nr_frags) 1426 { 1427 /* called only from within lan743x_tx_xmit_frame. 1428 * assuming tx->ring_lock has already been acquired. 1429 */ 1430 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1431 struct lan743x_tx_buffer_info *buffer_info = NULL; 1432 1433 /* wrap up previous descriptor */ 1434 tx->frame_data0 |= TX_DESC_DATA0_EXT_; 1435 if (nr_frags <= 0) { 1436 tx->frame_data0 |= TX_DESC_DATA0_LS_; 1437 tx->frame_data0 |= TX_DESC_DATA0_IOC_; 1438 } 1439 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1440 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0); 1441 1442 /* move to next descriptor */ 1443 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail); 1444 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1445 buffer_info = &tx->buffer_info[tx->frame_tail]; 1446 1447 /* add extension descriptor */ 1448 tx_descriptor->data1 = 0; 1449 tx_descriptor->data2 = 0; 1450 tx_descriptor->data3 = 0; 1451 1452 buffer_info->skb = NULL; 1453 buffer_info->dma_ptr = 0; 1454 buffer_info->buffer_length = 0; 1455 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE; 1456 1457 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) | 1458 TX_DESC_DATA0_DTYPE_EXT_ | 1459 TX_DESC_DATA0_EXT_LSO_; 1460 1461 /* data0 will be programmed in one of other frame assembler functions */ 1462 } 1463 1464 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx, 1465 const skb_frag_t *fragment, 1466 unsigned int frame_length) 1467 { 1468 /* called only from within lan743x_tx_xmit_frame 1469 * assuming tx->ring_lock has already been acquired 1470 */ 1471 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1472 struct lan743x_tx_buffer_info *buffer_info = NULL; 1473 struct lan743x_adapter *adapter = tx->adapter; 1474 struct device *dev = &adapter->pdev->dev; 1475 unsigned int fragment_length = 0; 1476 dma_addr_t dma_ptr; 1477 1478 fragment_length = skb_frag_size(fragment); 1479 if (!fragment_length) 1480 return 0; 1481 1482 /* wrap up previous descriptor */ 1483 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1484 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0); 1485 1486 /* move to next descriptor */ 1487 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail); 1488 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1489 buffer_info = &tx->buffer_info[tx->frame_tail]; 1490 dma_ptr = skb_frag_dma_map(dev, fragment, 1491 0, fragment_length, 1492 DMA_TO_DEVICE); 1493 if (dma_mapping_error(dev, dma_ptr)) { 1494 int desc_index; 1495 1496 /* cleanup all previously setup descriptors */ 1497 desc_index = tx->frame_first; 1498 while (desc_index != tx->frame_tail) { 1499 lan743x_tx_release_desc(tx, desc_index, true); 1500 desc_index = lan743x_tx_next_index(tx, desc_index); 1501 } 1502 dma_wmb(); 1503 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS; 1504 tx->frame_first = 0; 1505 tx->frame_data0 = 0; 1506 tx->frame_tail = 0; 1507 return -ENOMEM; 1508 } 1509 1510 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr)); 1511 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr)); 1512 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) & 1513 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_); 1514 1515 buffer_info->skb = NULL; 1516 buffer_info->dma_ptr = dma_ptr; 1517 buffer_info->buffer_length = fragment_length; 1518 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE; 1519 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT; 1520 1521 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) | 1522 TX_DESC_DATA0_DTYPE_DATA_ | 1523 TX_DESC_DATA0_FCS_; 1524 1525 /* data0 will be programmed in one of other frame assembler functions */ 1526 return 0; 1527 } 1528 1529 static void lan743x_tx_frame_end(struct lan743x_tx *tx, 1530 struct sk_buff *skb, 1531 bool time_stamp, 1532 bool ignore_sync) 1533 { 1534 /* called only from within lan743x_tx_xmit_frame 1535 * assuming tx->ring_lock has already been acquired 1536 */ 1537 struct lan743x_tx_descriptor *tx_descriptor = NULL; 1538 struct lan743x_tx_buffer_info *buffer_info = NULL; 1539 struct lan743x_adapter *adapter = tx->adapter; 1540 u32 tx_tail_flags = 0; 1541 1542 /* wrap up previous descriptor */ 1543 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) == 1544 TX_DESC_DATA0_DTYPE_DATA_) { 1545 tx->frame_data0 |= TX_DESC_DATA0_LS_; 1546 tx->frame_data0 |= TX_DESC_DATA0_IOC_; 1547 } 1548 1549 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail]; 1550 buffer_info = &tx->buffer_info[tx->frame_tail]; 1551 buffer_info->skb = skb; 1552 if (time_stamp) 1553 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED; 1554 if (ignore_sync) 1555 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC; 1556 1557 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0); 1558 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail); 1559 tx->last_tail = tx->frame_tail; 1560 1561 dma_wmb(); 1562 1563 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET) 1564 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_; 1565 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) 1566 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ | 1567 TX_TAIL_SET_TOP_INT_EN_; 1568 1569 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number), 1570 tx_tail_flags | tx->frame_tail); 1571 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS; 1572 } 1573 1574 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx, 1575 struct sk_buff *skb) 1576 { 1577 int required_number_of_descriptors = 0; 1578 unsigned int start_frame_length = 0; 1579 unsigned int frame_length = 0; 1580 unsigned int head_length = 0; 1581 unsigned long irq_flags = 0; 1582 bool do_timestamp = false; 1583 bool ignore_sync = false; 1584 int nr_frags = 0; 1585 bool gso = false; 1586 int j; 1587 1588 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb); 1589 1590 spin_lock_irqsave(&tx->ring_lock, irq_flags); 1591 if (required_number_of_descriptors > 1592 lan743x_tx_get_avail_desc(tx)) { 1593 if (required_number_of_descriptors > (tx->ring_size - 1)) { 1594 dev_kfree_skb_irq(skb); 1595 } else { 1596 /* save to overflow buffer */ 1597 tx->overflow_skb = skb; 1598 netif_stop_queue(tx->adapter->netdev); 1599 } 1600 goto unlock; 1601 } 1602 1603 /* space available, transmit skb */ 1604 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 1605 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) && 1606 (lan743x_ptp_request_tx_timestamp(tx->adapter))) { 1607 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 1608 do_timestamp = true; 1609 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC) 1610 ignore_sync = true; 1611 } 1612 head_length = skb_headlen(skb); 1613 frame_length = skb_pagelen(skb); 1614 nr_frags = skb_shinfo(skb)->nr_frags; 1615 start_frame_length = frame_length; 1616 gso = skb_is_gso(skb); 1617 if (gso) { 1618 start_frame_length = max(skb_shinfo(skb)->gso_size, 1619 (unsigned short)8); 1620 } 1621 1622 if (lan743x_tx_frame_start(tx, 1623 skb->data, head_length, 1624 start_frame_length, 1625 do_timestamp, 1626 skb->ip_summed == CHECKSUM_PARTIAL)) { 1627 dev_kfree_skb_irq(skb); 1628 goto unlock; 1629 } 1630 1631 if (gso) 1632 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags); 1633 1634 if (nr_frags <= 0) 1635 goto finish; 1636 1637 for (j = 0; j < nr_frags; j++) { 1638 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]); 1639 1640 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) { 1641 /* upon error no need to call 1642 * lan743x_tx_frame_end 1643 * frame assembler clean up was performed inside 1644 * lan743x_tx_frame_add_fragment 1645 */ 1646 dev_kfree_skb_irq(skb); 1647 goto unlock; 1648 } 1649 } 1650 1651 finish: 1652 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync); 1653 1654 unlock: 1655 spin_unlock_irqrestore(&tx->ring_lock, irq_flags); 1656 return NETDEV_TX_OK; 1657 } 1658 1659 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight) 1660 { 1661 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi); 1662 struct lan743x_adapter *adapter = tx->adapter; 1663 bool start_transmitter = false; 1664 unsigned long irq_flags = 0; 1665 u32 ioc_bit = 0; 1666 1667 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number); 1668 lan743x_csr_read(adapter, DMAC_INT_STS); 1669 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) 1670 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit); 1671 spin_lock_irqsave(&tx->ring_lock, irq_flags); 1672 1673 /* clean up tx ring */ 1674 lan743x_tx_release_completed_descriptors(tx); 1675 if (netif_queue_stopped(adapter->netdev)) { 1676 if (tx->overflow_skb) { 1677 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <= 1678 lan743x_tx_get_avail_desc(tx)) 1679 start_transmitter = true; 1680 } else { 1681 netif_wake_queue(adapter->netdev); 1682 } 1683 } 1684 spin_unlock_irqrestore(&tx->ring_lock, irq_flags); 1685 1686 if (start_transmitter) { 1687 /* space is now available, transmit overflow skb */ 1688 lan743x_tx_xmit_frame(tx, tx->overflow_skb); 1689 tx->overflow_skb = NULL; 1690 netif_wake_queue(adapter->netdev); 1691 } 1692 1693 if (!napi_complete(napi)) 1694 goto done; 1695 1696 /* enable isr */ 1697 lan743x_csr_write(adapter, INT_EN_SET, 1698 INT_BIT_DMA_TX_(tx->channel_number)); 1699 lan743x_csr_read(adapter, INT_STS); 1700 1701 done: 1702 return 0; 1703 } 1704 1705 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx) 1706 { 1707 if (tx->head_cpu_ptr) { 1708 dma_free_coherent(&tx->adapter->pdev->dev, 1709 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr, 1710 tx->head_dma_ptr); 1711 tx->head_cpu_ptr = NULL; 1712 tx->head_dma_ptr = 0; 1713 } 1714 kfree(tx->buffer_info); 1715 tx->buffer_info = NULL; 1716 1717 if (tx->ring_cpu_ptr) { 1718 dma_free_coherent(&tx->adapter->pdev->dev, 1719 tx->ring_allocation_size, tx->ring_cpu_ptr, 1720 tx->ring_dma_ptr); 1721 tx->ring_allocation_size = 0; 1722 tx->ring_cpu_ptr = NULL; 1723 tx->ring_dma_ptr = 0; 1724 } 1725 tx->ring_size = 0; 1726 } 1727 1728 static int lan743x_tx_ring_init(struct lan743x_tx *tx) 1729 { 1730 size_t ring_allocation_size = 0; 1731 void *cpu_ptr = NULL; 1732 dma_addr_t dma_ptr; 1733 int ret = -ENOMEM; 1734 1735 tx->ring_size = LAN743X_TX_RING_SIZE; 1736 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) { 1737 ret = -EINVAL; 1738 goto cleanup; 1739 } 1740 if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev, 1741 DMA_BIT_MASK(64))) { 1742 dev_warn(&tx->adapter->pdev->dev, 1743 "lan743x_: No suitable DMA available\n"); 1744 ret = -ENOMEM; 1745 goto cleanup; 1746 } 1747 ring_allocation_size = ALIGN(tx->ring_size * 1748 sizeof(struct lan743x_tx_descriptor), 1749 PAGE_SIZE); 1750 dma_ptr = 0; 1751 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev, 1752 ring_allocation_size, &dma_ptr, GFP_KERNEL); 1753 if (!cpu_ptr) { 1754 ret = -ENOMEM; 1755 goto cleanup; 1756 } 1757 1758 tx->ring_allocation_size = ring_allocation_size; 1759 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr; 1760 tx->ring_dma_ptr = dma_ptr; 1761 1762 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL); 1763 if (!cpu_ptr) { 1764 ret = -ENOMEM; 1765 goto cleanup; 1766 } 1767 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr; 1768 dma_ptr = 0; 1769 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev, 1770 sizeof(*tx->head_cpu_ptr), &dma_ptr, 1771 GFP_KERNEL); 1772 if (!cpu_ptr) { 1773 ret = -ENOMEM; 1774 goto cleanup; 1775 } 1776 1777 tx->head_cpu_ptr = cpu_ptr; 1778 tx->head_dma_ptr = dma_ptr; 1779 if (tx->head_dma_ptr & 0x3) { 1780 ret = -ENOMEM; 1781 goto cleanup; 1782 } 1783 1784 return 0; 1785 1786 cleanup: 1787 lan743x_tx_ring_cleanup(tx); 1788 return ret; 1789 } 1790 1791 static void lan743x_tx_close(struct lan743x_tx *tx) 1792 { 1793 struct lan743x_adapter *adapter = tx->adapter; 1794 1795 lan743x_csr_write(adapter, 1796 DMAC_CMD, 1797 DMAC_CMD_STOP_T_(tx->channel_number)); 1798 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number); 1799 1800 lan743x_csr_write(adapter, 1801 DMAC_INT_EN_CLR, 1802 DMAC_INT_BIT_TX_IOC_(tx->channel_number)); 1803 lan743x_csr_write(adapter, INT_EN_CLR, 1804 INT_BIT_DMA_TX_(tx->channel_number)); 1805 napi_disable(&tx->napi); 1806 netif_napi_del(&tx->napi); 1807 1808 lan743x_csr_write(adapter, FCT_TX_CTL, 1809 FCT_TX_CTL_DIS_(tx->channel_number)); 1810 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL, 1811 FCT_TX_CTL_EN_(tx->channel_number), 1812 0, 1000, 20000, 100); 1813 1814 lan743x_tx_release_all_descriptors(tx); 1815 1816 if (tx->overflow_skb) { 1817 dev_kfree_skb(tx->overflow_skb); 1818 tx->overflow_skb = NULL; 1819 } 1820 1821 lan743x_tx_ring_cleanup(tx); 1822 } 1823 1824 static int lan743x_tx_open(struct lan743x_tx *tx) 1825 { 1826 struct lan743x_adapter *adapter = NULL; 1827 u32 data = 0; 1828 int ret; 1829 1830 adapter = tx->adapter; 1831 ret = lan743x_tx_ring_init(tx); 1832 if (ret) 1833 return ret; 1834 1835 /* initialize fifo */ 1836 lan743x_csr_write(adapter, FCT_TX_CTL, 1837 FCT_TX_CTL_RESET_(tx->channel_number)); 1838 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL, 1839 FCT_TX_CTL_RESET_(tx->channel_number), 1840 0, 1000, 20000, 100); 1841 1842 /* enable fifo */ 1843 lan743x_csr_write(adapter, FCT_TX_CTL, 1844 FCT_TX_CTL_EN_(tx->channel_number)); 1845 1846 /* reset tx channel */ 1847 lan743x_csr_write(adapter, DMAC_CMD, 1848 DMAC_CMD_TX_SWR_(tx->channel_number)); 1849 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, 1850 DMAC_CMD_TX_SWR_(tx->channel_number), 1851 0, 1000, 20000, 100); 1852 1853 /* Write TX_BASE_ADDR */ 1854 lan743x_csr_write(adapter, 1855 TX_BASE_ADDRH(tx->channel_number), 1856 DMA_ADDR_HIGH32(tx->ring_dma_ptr)); 1857 lan743x_csr_write(adapter, 1858 TX_BASE_ADDRL(tx->channel_number), 1859 DMA_ADDR_LOW32(tx->ring_dma_ptr)); 1860 1861 /* Write TX_CFG_B */ 1862 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number)); 1863 data &= ~TX_CFG_B_TX_RING_LEN_MASK_; 1864 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_); 1865 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) 1866 data |= TX_CFG_B_TDMABL_512_; 1867 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data); 1868 1869 /* Write TX_CFG_A */ 1870 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_; 1871 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 1872 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_; 1873 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10); 1874 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04); 1875 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07); 1876 } 1877 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data); 1878 1879 /* Write TX_HEAD_WRITEBACK_ADDR */ 1880 lan743x_csr_write(adapter, 1881 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number), 1882 DMA_ADDR_HIGH32(tx->head_dma_ptr)); 1883 lan743x_csr_write(adapter, 1884 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number), 1885 DMA_ADDR_LOW32(tx->head_dma_ptr)); 1886 1887 /* set last head */ 1888 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number)); 1889 1890 /* write TX_TAIL */ 1891 tx->last_tail = 0; 1892 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number), 1893 (u32)(tx->last_tail)); 1894 tx->vector_flags = lan743x_intr_get_vector_flags(adapter, 1895 INT_BIT_DMA_TX_ 1896 (tx->channel_number)); 1897 netif_tx_napi_add(adapter->netdev, 1898 &tx->napi, lan743x_tx_napi_poll, 1899 tx->ring_size - 1); 1900 napi_enable(&tx->napi); 1901 1902 data = 0; 1903 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR) 1904 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_; 1905 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR) 1906 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_; 1907 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C) 1908 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_; 1909 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C) 1910 data |= TX_CFG_C_TX_INT_EN_R2C_; 1911 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data); 1912 1913 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)) 1914 lan743x_csr_write(adapter, INT_EN_SET, 1915 INT_BIT_DMA_TX_(tx->channel_number)); 1916 lan743x_csr_write(adapter, DMAC_INT_EN_SET, 1917 DMAC_INT_BIT_TX_IOC_(tx->channel_number)); 1918 1919 /* start dmac channel */ 1920 lan743x_csr_write(adapter, DMAC_CMD, 1921 DMAC_CMD_START_T_(tx->channel_number)); 1922 return 0; 1923 } 1924 1925 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index) 1926 { 1927 return ((++index) % rx->ring_size); 1928 } 1929 1930 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index) 1931 { 1932 /* update the tail once per 8 descriptors */ 1933 if ((index & 7) == 7) 1934 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number), 1935 index); 1936 } 1937 1938 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index, 1939 gfp_t gfp) 1940 { 1941 struct net_device *netdev = rx->adapter->netdev; 1942 struct device *dev = &rx->adapter->pdev->dev; 1943 struct lan743x_rx_buffer_info *buffer_info; 1944 unsigned int buffer_length, used_length; 1945 struct lan743x_rx_descriptor *descriptor; 1946 struct sk_buff *skb; 1947 dma_addr_t dma_ptr; 1948 1949 buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING; 1950 1951 descriptor = &rx->ring_cpu_ptr[index]; 1952 buffer_info = &rx->buffer_info[index]; 1953 skb = __netdev_alloc_skb(netdev, buffer_length, gfp); 1954 if (!skb) 1955 return -ENOMEM; 1956 dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE); 1957 if (dma_mapping_error(dev, dma_ptr)) { 1958 dev_kfree_skb_any(skb); 1959 return -ENOMEM; 1960 } 1961 if (buffer_info->dma_ptr) { 1962 /* sync used area of buffer only */ 1963 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_) 1964 /* frame length is valid only if LS bit is set. 1965 * it's a safe upper bound for the used area in this 1966 * buffer. 1967 */ 1968 used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_ 1969 (le32_to_cpu(descriptor->data0)), 1970 buffer_info->buffer_length); 1971 else 1972 used_length = buffer_info->buffer_length; 1973 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr, 1974 used_length, 1975 DMA_FROM_DEVICE); 1976 dma_unmap_single_attrs(dev, buffer_info->dma_ptr, 1977 buffer_info->buffer_length, 1978 DMA_FROM_DEVICE, 1979 DMA_ATTR_SKIP_CPU_SYNC); 1980 } 1981 1982 buffer_info->skb = skb; 1983 buffer_info->dma_ptr = dma_ptr; 1984 buffer_info->buffer_length = buffer_length; 1985 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr)); 1986 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr)); 1987 descriptor->data3 = 0; 1988 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ | 1989 (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_))); 1990 lan743x_rx_update_tail(rx, index); 1991 1992 return 0; 1993 } 1994 1995 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index) 1996 { 1997 struct lan743x_rx_buffer_info *buffer_info; 1998 struct lan743x_rx_descriptor *descriptor; 1999 2000 descriptor = &rx->ring_cpu_ptr[index]; 2001 buffer_info = &rx->buffer_info[index]; 2002 2003 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr)); 2004 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr)); 2005 descriptor->data3 = 0; 2006 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ | 2007 ((buffer_info->buffer_length) & 2008 RX_DESC_DATA0_BUF_LENGTH_MASK_))); 2009 lan743x_rx_update_tail(rx, index); 2010 } 2011 2012 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index) 2013 { 2014 struct lan743x_rx_buffer_info *buffer_info; 2015 struct lan743x_rx_descriptor *descriptor; 2016 2017 descriptor = &rx->ring_cpu_ptr[index]; 2018 buffer_info = &rx->buffer_info[index]; 2019 2020 memset(descriptor, 0, sizeof(*descriptor)); 2021 2022 if (buffer_info->dma_ptr) { 2023 dma_unmap_single(&rx->adapter->pdev->dev, 2024 buffer_info->dma_ptr, 2025 buffer_info->buffer_length, 2026 DMA_FROM_DEVICE); 2027 buffer_info->dma_ptr = 0; 2028 } 2029 2030 if (buffer_info->skb) { 2031 dev_kfree_skb(buffer_info->skb); 2032 buffer_info->skb = NULL; 2033 } 2034 2035 memset(buffer_info, 0, sizeof(*buffer_info)); 2036 } 2037 2038 static struct sk_buff * 2039 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length) 2040 { 2041 if (skb_linearize(skb)) { 2042 dev_kfree_skb_irq(skb); 2043 return NULL; 2044 } 2045 frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN); 2046 if (skb->len > frame_length) { 2047 skb->tail -= skb->len - frame_length; 2048 skb->len = frame_length; 2049 } 2050 return skb; 2051 } 2052 2053 static int lan743x_rx_process_buffer(struct lan743x_rx *rx) 2054 { 2055 int current_head_index = le32_to_cpu(*rx->head_cpu_ptr); 2056 struct lan743x_rx_descriptor *descriptor, *desc_ext; 2057 struct net_device *netdev = rx->adapter->netdev; 2058 int result = RX_PROCESS_RESULT_NOTHING_TO_DO; 2059 struct lan743x_rx_buffer_info *buffer_info; 2060 int frame_length, buffer_length; 2061 int extension_index = -1; 2062 bool is_last, is_first; 2063 struct sk_buff *skb; 2064 2065 if (current_head_index < 0 || current_head_index >= rx->ring_size) 2066 goto done; 2067 2068 if (rx->last_head < 0 || rx->last_head >= rx->ring_size) 2069 goto done; 2070 2071 if (rx->last_head == current_head_index) 2072 goto done; 2073 2074 descriptor = &rx->ring_cpu_ptr[rx->last_head]; 2075 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_) 2076 goto done; 2077 buffer_info = &rx->buffer_info[rx->last_head]; 2078 2079 is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_; 2080 is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_; 2081 2082 if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) { 2083 /* extension is expected to follow */ 2084 int index = lan743x_rx_next_index(rx, rx->last_head); 2085 2086 if (index == current_head_index) 2087 /* extension not yet available */ 2088 goto done; 2089 desc_ext = &rx->ring_cpu_ptr[index]; 2090 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_) 2091 /* extension not yet available */ 2092 goto done; 2093 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_)) 2094 goto move_forward; 2095 extension_index = index; 2096 } 2097 2098 /* Only the last buffer in a multi-buffer frame contains the total frame 2099 * length. The chip occasionally sends more buffers than strictly 2100 * required to reach the total frame length. 2101 * Handle this by adding all buffers to the skb in their entirety. 2102 * Once the real frame length is known, trim the skb. 2103 */ 2104 frame_length = 2105 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0)); 2106 buffer_length = buffer_info->buffer_length; 2107 2108 netdev_dbg(netdev, "%s%schunk: %d/%d", 2109 is_first ? "first " : " ", 2110 is_last ? "last " : " ", 2111 frame_length, buffer_length); 2112 2113 /* save existing skb, allocate new skb and map to dma */ 2114 skb = buffer_info->skb; 2115 if (lan743x_rx_init_ring_element(rx, rx->last_head, 2116 GFP_ATOMIC | GFP_DMA)) { 2117 /* failed to allocate next skb. 2118 * Memory is very low. 2119 * Drop this packet and reuse buffer. 2120 */ 2121 lan743x_rx_reuse_ring_element(rx, rx->last_head); 2122 /* drop packet that was being assembled */ 2123 dev_kfree_skb_irq(rx->skb_head); 2124 rx->skb_head = NULL; 2125 goto process_extension; 2126 } 2127 2128 /* add buffers to skb via skb->frag_list */ 2129 if (is_first) { 2130 skb_reserve(skb, RX_HEAD_PADDING); 2131 skb_put(skb, buffer_length - RX_HEAD_PADDING); 2132 if (rx->skb_head) 2133 dev_kfree_skb_irq(rx->skb_head); 2134 rx->skb_head = skb; 2135 } else if (rx->skb_head) { 2136 skb_put(skb, buffer_length); 2137 if (skb_shinfo(rx->skb_head)->frag_list) 2138 rx->skb_tail->next = skb; 2139 else 2140 skb_shinfo(rx->skb_head)->frag_list = skb; 2141 rx->skb_tail = skb; 2142 rx->skb_head->len += skb->len; 2143 rx->skb_head->data_len += skb->len; 2144 rx->skb_head->truesize += skb->truesize; 2145 } else { 2146 /* packet to assemble has already been dropped because one or 2147 * more of its buffers could not be allocated 2148 */ 2149 netdev_dbg(netdev, "drop buffer intended for dropped packet"); 2150 dev_kfree_skb_irq(skb); 2151 } 2152 2153 process_extension: 2154 if (extension_index >= 0) { 2155 u32 ts_sec; 2156 u32 ts_nsec; 2157 2158 ts_sec = le32_to_cpu(desc_ext->data1); 2159 ts_nsec = (le32_to_cpu(desc_ext->data2) & 2160 RX_DESC_DATA2_TS_NS_MASK_); 2161 if (rx->skb_head) 2162 skb_hwtstamps(rx->skb_head)->hwtstamp = 2163 ktime_set(ts_sec, ts_nsec); 2164 lan743x_rx_reuse_ring_element(rx, extension_index); 2165 rx->last_head = extension_index; 2166 netdev_dbg(netdev, "process extension"); 2167 } 2168 2169 if (is_last && rx->skb_head) 2170 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length); 2171 2172 if (is_last && rx->skb_head) { 2173 rx->skb_head->protocol = eth_type_trans(rx->skb_head, 2174 rx->adapter->netdev); 2175 netdev_dbg(netdev, "sending %d byte frame to OS", 2176 rx->skb_head->len); 2177 napi_gro_receive(&rx->napi, rx->skb_head); 2178 rx->skb_head = NULL; 2179 } 2180 2181 move_forward: 2182 /* push tail and head forward */ 2183 rx->last_tail = rx->last_head; 2184 rx->last_head = lan743x_rx_next_index(rx, rx->last_head); 2185 result = RX_PROCESS_RESULT_BUFFER_RECEIVED; 2186 done: 2187 return result; 2188 } 2189 2190 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight) 2191 { 2192 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi); 2193 struct lan743x_adapter *adapter = rx->adapter; 2194 int result = RX_PROCESS_RESULT_NOTHING_TO_DO; 2195 u32 rx_tail_flags = 0; 2196 int count; 2197 2198 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) { 2199 /* clear int status bit before reading packet */ 2200 lan743x_csr_write(adapter, DMAC_INT_STS, 2201 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2202 } 2203 for (count = 0; count < weight; count++) { 2204 result = lan743x_rx_process_buffer(rx); 2205 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO) 2206 break; 2207 } 2208 rx->frame_count += count; 2209 if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED) 2210 return weight; 2211 2212 if (!napi_complete_done(napi, count)) 2213 return count; 2214 2215 /* re-arm interrupts, must write to rx tail on some chip variants */ 2216 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET) 2217 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_; 2218 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) { 2219 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_; 2220 } else { 2221 lan743x_csr_write(adapter, INT_EN_SET, 2222 INT_BIT_DMA_RX_(rx->channel_number)); 2223 } 2224 2225 if (rx_tail_flags) 2226 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number), 2227 rx_tail_flags | rx->last_tail); 2228 2229 return count; 2230 } 2231 2232 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx) 2233 { 2234 if (rx->buffer_info && rx->ring_cpu_ptr) { 2235 int index; 2236 2237 for (index = 0; index < rx->ring_size; index++) 2238 lan743x_rx_release_ring_element(rx, index); 2239 } 2240 2241 if (rx->head_cpu_ptr) { 2242 dma_free_coherent(&rx->adapter->pdev->dev, 2243 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr, 2244 rx->head_dma_ptr); 2245 rx->head_cpu_ptr = NULL; 2246 rx->head_dma_ptr = 0; 2247 } 2248 2249 kfree(rx->buffer_info); 2250 rx->buffer_info = NULL; 2251 2252 if (rx->ring_cpu_ptr) { 2253 dma_free_coherent(&rx->adapter->pdev->dev, 2254 rx->ring_allocation_size, rx->ring_cpu_ptr, 2255 rx->ring_dma_ptr); 2256 rx->ring_allocation_size = 0; 2257 rx->ring_cpu_ptr = NULL; 2258 rx->ring_dma_ptr = 0; 2259 } 2260 2261 rx->ring_size = 0; 2262 rx->last_head = 0; 2263 } 2264 2265 static int lan743x_rx_ring_init(struct lan743x_rx *rx) 2266 { 2267 size_t ring_allocation_size = 0; 2268 dma_addr_t dma_ptr = 0; 2269 void *cpu_ptr = NULL; 2270 int ret = -ENOMEM; 2271 int index = 0; 2272 2273 rx->ring_size = LAN743X_RX_RING_SIZE; 2274 if (rx->ring_size <= 1) { 2275 ret = -EINVAL; 2276 goto cleanup; 2277 } 2278 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) { 2279 ret = -EINVAL; 2280 goto cleanup; 2281 } 2282 if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev, 2283 DMA_BIT_MASK(64))) { 2284 dev_warn(&rx->adapter->pdev->dev, 2285 "lan743x_: No suitable DMA available\n"); 2286 ret = -ENOMEM; 2287 goto cleanup; 2288 } 2289 ring_allocation_size = ALIGN(rx->ring_size * 2290 sizeof(struct lan743x_rx_descriptor), 2291 PAGE_SIZE); 2292 dma_ptr = 0; 2293 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev, 2294 ring_allocation_size, &dma_ptr, GFP_KERNEL); 2295 if (!cpu_ptr) { 2296 ret = -ENOMEM; 2297 goto cleanup; 2298 } 2299 rx->ring_allocation_size = ring_allocation_size; 2300 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr; 2301 rx->ring_dma_ptr = dma_ptr; 2302 2303 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info), 2304 GFP_KERNEL); 2305 if (!cpu_ptr) { 2306 ret = -ENOMEM; 2307 goto cleanup; 2308 } 2309 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr; 2310 dma_ptr = 0; 2311 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev, 2312 sizeof(*rx->head_cpu_ptr), &dma_ptr, 2313 GFP_KERNEL); 2314 if (!cpu_ptr) { 2315 ret = -ENOMEM; 2316 goto cleanup; 2317 } 2318 2319 rx->head_cpu_ptr = cpu_ptr; 2320 rx->head_dma_ptr = dma_ptr; 2321 if (rx->head_dma_ptr & 0x3) { 2322 ret = -ENOMEM; 2323 goto cleanup; 2324 } 2325 2326 rx->last_head = 0; 2327 for (index = 0; index < rx->ring_size; index++) { 2328 ret = lan743x_rx_init_ring_element(rx, index, GFP_KERNEL); 2329 if (ret) 2330 goto cleanup; 2331 } 2332 return 0; 2333 2334 cleanup: 2335 netif_warn(rx->adapter, ifup, rx->adapter->netdev, 2336 "Error allocating memory for LAN743x\n"); 2337 2338 lan743x_rx_ring_cleanup(rx); 2339 return ret; 2340 } 2341 2342 static void lan743x_rx_close(struct lan743x_rx *rx) 2343 { 2344 struct lan743x_adapter *adapter = rx->adapter; 2345 2346 lan743x_csr_write(adapter, FCT_RX_CTL, 2347 FCT_RX_CTL_DIS_(rx->channel_number)); 2348 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL, 2349 FCT_RX_CTL_EN_(rx->channel_number), 2350 0, 1000, 20000, 100); 2351 2352 lan743x_csr_write(adapter, DMAC_CMD, 2353 DMAC_CMD_STOP_R_(rx->channel_number)); 2354 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number); 2355 2356 lan743x_csr_write(adapter, DMAC_INT_EN_CLR, 2357 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2358 lan743x_csr_write(adapter, INT_EN_CLR, 2359 INT_BIT_DMA_RX_(rx->channel_number)); 2360 napi_disable(&rx->napi); 2361 2362 netif_napi_del(&rx->napi); 2363 2364 lan743x_rx_ring_cleanup(rx); 2365 } 2366 2367 static int lan743x_rx_open(struct lan743x_rx *rx) 2368 { 2369 struct lan743x_adapter *adapter = rx->adapter; 2370 u32 data = 0; 2371 int ret; 2372 2373 rx->frame_count = 0; 2374 ret = lan743x_rx_ring_init(rx); 2375 if (ret) 2376 goto return_error; 2377 2378 netif_napi_add(adapter->netdev, 2379 &rx->napi, lan743x_rx_napi_poll, 2380 NAPI_POLL_WEIGHT); 2381 2382 lan743x_csr_write(adapter, DMAC_CMD, 2383 DMAC_CMD_RX_SWR_(rx->channel_number)); 2384 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, 2385 DMAC_CMD_RX_SWR_(rx->channel_number), 2386 0, 1000, 20000, 100); 2387 2388 /* set ring base address */ 2389 lan743x_csr_write(adapter, 2390 RX_BASE_ADDRH(rx->channel_number), 2391 DMA_ADDR_HIGH32(rx->ring_dma_ptr)); 2392 lan743x_csr_write(adapter, 2393 RX_BASE_ADDRL(rx->channel_number), 2394 DMA_ADDR_LOW32(rx->ring_dma_ptr)); 2395 2396 /* set rx write back address */ 2397 lan743x_csr_write(adapter, 2398 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number), 2399 DMA_ADDR_HIGH32(rx->head_dma_ptr)); 2400 lan743x_csr_write(adapter, 2401 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number), 2402 DMA_ADDR_LOW32(rx->head_dma_ptr)); 2403 data = RX_CFG_A_RX_HP_WB_EN_; 2404 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) { 2405 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ | 2406 RX_CFG_A_RX_WB_THRES_SET_(0x7) | 2407 RX_CFG_A_RX_PF_THRES_SET_(16) | 2408 RX_CFG_A_RX_PF_PRI_THRES_SET_(4)); 2409 } 2410 2411 /* set RX_CFG_A */ 2412 lan743x_csr_write(adapter, 2413 RX_CFG_A(rx->channel_number), data); 2414 2415 /* set RX_CFG_B */ 2416 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number)); 2417 data &= ~RX_CFG_B_RX_PAD_MASK_; 2418 if (!RX_HEAD_PADDING) 2419 data |= RX_CFG_B_RX_PAD_0_; 2420 else 2421 data |= RX_CFG_B_RX_PAD_2_; 2422 data &= ~RX_CFG_B_RX_RING_LEN_MASK_; 2423 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_); 2424 data |= RX_CFG_B_TS_ALL_RX_; 2425 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) 2426 data |= RX_CFG_B_RDMABL_512_; 2427 2428 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data); 2429 rx->vector_flags = lan743x_intr_get_vector_flags(adapter, 2430 INT_BIT_DMA_RX_ 2431 (rx->channel_number)); 2432 2433 /* set RX_CFG_C */ 2434 data = 0; 2435 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR) 2436 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_; 2437 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR) 2438 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_; 2439 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C) 2440 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_; 2441 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C) 2442 data |= RX_CFG_C_RX_INT_EN_R2C_; 2443 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data); 2444 2445 rx->last_tail = ((u32)(rx->ring_size - 1)); 2446 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number), 2447 rx->last_tail); 2448 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number)); 2449 if (rx->last_head) { 2450 ret = -EIO; 2451 goto napi_delete; 2452 } 2453 2454 napi_enable(&rx->napi); 2455 2456 lan743x_csr_write(adapter, INT_EN_SET, 2457 INT_BIT_DMA_RX_(rx->channel_number)); 2458 lan743x_csr_write(adapter, DMAC_INT_STS, 2459 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2460 lan743x_csr_write(adapter, DMAC_INT_EN_SET, 2461 DMAC_INT_BIT_RXFRM_(rx->channel_number)); 2462 lan743x_csr_write(adapter, DMAC_CMD, 2463 DMAC_CMD_START_R_(rx->channel_number)); 2464 2465 /* initialize fifo */ 2466 lan743x_csr_write(adapter, FCT_RX_CTL, 2467 FCT_RX_CTL_RESET_(rx->channel_number)); 2468 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL, 2469 FCT_RX_CTL_RESET_(rx->channel_number), 2470 0, 1000, 20000, 100); 2471 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number), 2472 FCT_FLOW_CTL_REQ_EN_ | 2473 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) | 2474 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA)); 2475 2476 /* enable fifo */ 2477 lan743x_csr_write(adapter, FCT_RX_CTL, 2478 FCT_RX_CTL_EN_(rx->channel_number)); 2479 return 0; 2480 2481 napi_delete: 2482 netif_napi_del(&rx->napi); 2483 lan743x_rx_ring_cleanup(rx); 2484 2485 return_error: 2486 return ret; 2487 } 2488 2489 static int lan743x_netdev_close(struct net_device *netdev) 2490 { 2491 struct lan743x_adapter *adapter = netdev_priv(netdev); 2492 int index; 2493 2494 lan743x_tx_close(&adapter->tx[0]); 2495 2496 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) 2497 lan743x_rx_close(&adapter->rx[index]); 2498 2499 lan743x_ptp_close(adapter); 2500 2501 lan743x_phy_close(adapter); 2502 2503 lan743x_mac_close(adapter); 2504 2505 lan743x_intr_close(adapter); 2506 2507 return 0; 2508 } 2509 2510 static int lan743x_netdev_open(struct net_device *netdev) 2511 { 2512 struct lan743x_adapter *adapter = netdev_priv(netdev); 2513 int index; 2514 int ret; 2515 2516 ret = lan743x_intr_open(adapter); 2517 if (ret) 2518 goto return_error; 2519 2520 ret = lan743x_mac_open(adapter); 2521 if (ret) 2522 goto close_intr; 2523 2524 ret = lan743x_phy_open(adapter); 2525 if (ret) 2526 goto close_mac; 2527 2528 ret = lan743x_ptp_open(adapter); 2529 if (ret) 2530 goto close_phy; 2531 2532 lan743x_rfe_open(adapter); 2533 2534 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) { 2535 ret = lan743x_rx_open(&adapter->rx[index]); 2536 if (ret) 2537 goto close_rx; 2538 } 2539 2540 ret = lan743x_tx_open(&adapter->tx[0]); 2541 if (ret) 2542 goto close_rx; 2543 2544 return 0; 2545 2546 close_rx: 2547 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) { 2548 if (adapter->rx[index].ring_cpu_ptr) 2549 lan743x_rx_close(&adapter->rx[index]); 2550 } 2551 lan743x_ptp_close(adapter); 2552 2553 close_phy: 2554 lan743x_phy_close(adapter); 2555 2556 close_mac: 2557 lan743x_mac_close(adapter); 2558 2559 close_intr: 2560 lan743x_intr_close(adapter); 2561 2562 return_error: 2563 netif_warn(adapter, ifup, adapter->netdev, 2564 "Error opening LAN743x\n"); 2565 return ret; 2566 } 2567 2568 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb, 2569 struct net_device *netdev) 2570 { 2571 struct lan743x_adapter *adapter = netdev_priv(netdev); 2572 2573 return lan743x_tx_xmit_frame(&adapter->tx[0], skb); 2574 } 2575 2576 static int lan743x_netdev_ioctl(struct net_device *netdev, 2577 struct ifreq *ifr, int cmd) 2578 { 2579 if (!netif_running(netdev)) 2580 return -EINVAL; 2581 if (cmd == SIOCSHWTSTAMP) 2582 return lan743x_ptp_ioctl(netdev, ifr, cmd); 2583 return phy_mii_ioctl(netdev->phydev, ifr, cmd); 2584 } 2585 2586 static void lan743x_netdev_set_multicast(struct net_device *netdev) 2587 { 2588 struct lan743x_adapter *adapter = netdev_priv(netdev); 2589 2590 lan743x_rfe_set_multicast(adapter); 2591 } 2592 2593 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu) 2594 { 2595 struct lan743x_adapter *adapter = netdev_priv(netdev); 2596 int ret = 0; 2597 2598 ret = lan743x_mac_set_mtu(adapter, new_mtu); 2599 if (!ret) 2600 netdev->mtu = new_mtu; 2601 return ret; 2602 } 2603 2604 static void lan743x_netdev_get_stats64(struct net_device *netdev, 2605 struct rtnl_link_stats64 *stats) 2606 { 2607 struct lan743x_adapter *adapter = netdev_priv(netdev); 2608 2609 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES); 2610 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES); 2611 stats->rx_bytes = lan743x_csr_read(adapter, 2612 STAT_RX_UNICAST_BYTE_COUNT) + 2613 lan743x_csr_read(adapter, 2614 STAT_RX_BROADCAST_BYTE_COUNT) + 2615 lan743x_csr_read(adapter, 2616 STAT_RX_MULTICAST_BYTE_COUNT); 2617 stats->tx_bytes = lan743x_csr_read(adapter, 2618 STAT_TX_UNICAST_BYTE_COUNT) + 2619 lan743x_csr_read(adapter, 2620 STAT_TX_BROADCAST_BYTE_COUNT) + 2621 lan743x_csr_read(adapter, 2622 STAT_TX_MULTICAST_BYTE_COUNT); 2623 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) + 2624 lan743x_csr_read(adapter, 2625 STAT_RX_ALIGNMENT_ERRORS) + 2626 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) + 2627 lan743x_csr_read(adapter, 2628 STAT_RX_UNDERSIZE_FRAME_ERRORS) + 2629 lan743x_csr_read(adapter, 2630 STAT_RX_OVERSIZE_FRAME_ERRORS); 2631 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) + 2632 lan743x_csr_read(adapter, 2633 STAT_TX_EXCESS_DEFERRAL_ERRORS) + 2634 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS); 2635 stats->rx_dropped = lan743x_csr_read(adapter, 2636 STAT_RX_DROPPED_FRAMES); 2637 stats->tx_dropped = lan743x_csr_read(adapter, 2638 STAT_TX_EXCESSIVE_COLLISION); 2639 stats->multicast = lan743x_csr_read(adapter, 2640 STAT_RX_MULTICAST_FRAMES) + 2641 lan743x_csr_read(adapter, 2642 STAT_TX_MULTICAST_FRAMES); 2643 stats->collisions = lan743x_csr_read(adapter, 2644 STAT_TX_SINGLE_COLLISIONS) + 2645 lan743x_csr_read(adapter, 2646 STAT_TX_MULTIPLE_COLLISIONS) + 2647 lan743x_csr_read(adapter, 2648 STAT_TX_LATE_COLLISIONS); 2649 } 2650 2651 static int lan743x_netdev_set_mac_address(struct net_device *netdev, 2652 void *addr) 2653 { 2654 struct lan743x_adapter *adapter = netdev_priv(netdev); 2655 struct sockaddr *sock_addr = addr; 2656 int ret; 2657 2658 ret = eth_prepare_mac_addr_change(netdev, sock_addr); 2659 if (ret) 2660 return ret; 2661 eth_hw_addr_set(netdev, sock_addr->sa_data); 2662 lan743x_mac_set_address(adapter, sock_addr->sa_data); 2663 lan743x_rfe_update_mac_address(adapter); 2664 return 0; 2665 } 2666 2667 static const struct net_device_ops lan743x_netdev_ops = { 2668 .ndo_open = lan743x_netdev_open, 2669 .ndo_stop = lan743x_netdev_close, 2670 .ndo_start_xmit = lan743x_netdev_xmit_frame, 2671 .ndo_eth_ioctl = lan743x_netdev_ioctl, 2672 .ndo_set_rx_mode = lan743x_netdev_set_multicast, 2673 .ndo_change_mtu = lan743x_netdev_change_mtu, 2674 .ndo_get_stats64 = lan743x_netdev_get_stats64, 2675 .ndo_set_mac_address = lan743x_netdev_set_mac_address, 2676 }; 2677 2678 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter) 2679 { 2680 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF); 2681 } 2682 2683 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter) 2684 { 2685 mdiobus_unregister(adapter->mdiobus); 2686 } 2687 2688 static void lan743x_full_cleanup(struct lan743x_adapter *adapter) 2689 { 2690 unregister_netdev(adapter->netdev); 2691 2692 lan743x_mdiobus_cleanup(adapter); 2693 lan743x_hardware_cleanup(adapter); 2694 lan743x_pci_cleanup(adapter); 2695 } 2696 2697 static int lan743x_hardware_init(struct lan743x_adapter *adapter, 2698 struct pci_dev *pdev) 2699 { 2700 struct lan743x_tx *tx; 2701 int index; 2702 int ret; 2703 2704 adapter->intr.irq = adapter->pdev->irq; 2705 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF); 2706 2707 ret = lan743x_gpio_init(adapter); 2708 if (ret) 2709 return ret; 2710 2711 ret = lan743x_mac_init(adapter); 2712 if (ret) 2713 return ret; 2714 2715 ret = lan743x_phy_init(adapter); 2716 if (ret) 2717 return ret; 2718 2719 ret = lan743x_ptp_init(adapter); 2720 if (ret) 2721 return ret; 2722 2723 lan743x_rfe_update_mac_address(adapter); 2724 2725 ret = lan743x_dmac_init(adapter); 2726 if (ret) 2727 return ret; 2728 2729 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) { 2730 adapter->rx[index].adapter = adapter; 2731 adapter->rx[index].channel_number = index; 2732 } 2733 2734 tx = &adapter->tx[0]; 2735 tx->adapter = adapter; 2736 tx->channel_number = 0; 2737 spin_lock_init(&tx->ring_lock); 2738 return 0; 2739 } 2740 2741 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter) 2742 { 2743 int ret; 2744 2745 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev); 2746 if (!(adapter->mdiobus)) { 2747 ret = -ENOMEM; 2748 goto return_error; 2749 } 2750 2751 adapter->mdiobus->priv = (void *)adapter; 2752 adapter->mdiobus->read = lan743x_mdiobus_read; 2753 adapter->mdiobus->write = lan743x_mdiobus_write; 2754 adapter->mdiobus->name = "lan743x-mdiobus"; 2755 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE, 2756 "pci-%s", pci_name(adapter->pdev)); 2757 2758 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_) 2759 /* LAN7430 uses internal phy at address 1 */ 2760 adapter->mdiobus->phy_mask = ~(u32)BIT(1); 2761 2762 /* register mdiobus */ 2763 ret = mdiobus_register(adapter->mdiobus); 2764 if (ret < 0) 2765 goto return_error; 2766 return 0; 2767 2768 return_error: 2769 return ret; 2770 } 2771 2772 /* lan743x_pcidev_probe - Device Initialization Routine 2773 * @pdev: PCI device information struct 2774 * @id: entry in lan743x_pci_tbl 2775 * 2776 * Returns 0 on success, negative on failure 2777 * 2778 * initializes an adapter identified by a pci_dev structure. 2779 * The OS initialization, configuring of the adapter private structure, 2780 * and a hardware reset occur. 2781 **/ 2782 static int lan743x_pcidev_probe(struct pci_dev *pdev, 2783 const struct pci_device_id *id) 2784 { 2785 struct lan743x_adapter *adapter = NULL; 2786 struct net_device *netdev = NULL; 2787 int ret = -ENODEV; 2788 2789 netdev = devm_alloc_etherdev(&pdev->dev, 2790 sizeof(struct lan743x_adapter)); 2791 if (!netdev) 2792 goto return_error; 2793 2794 SET_NETDEV_DEV(netdev, &pdev->dev); 2795 pci_set_drvdata(pdev, netdev); 2796 adapter = netdev_priv(netdev); 2797 adapter->netdev = netdev; 2798 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE | 2799 NETIF_MSG_LINK | NETIF_MSG_IFUP | 2800 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED; 2801 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE; 2802 2803 of_get_mac_address(pdev->dev.of_node, adapter->mac_address); 2804 2805 ret = lan743x_pci_init(adapter, pdev); 2806 if (ret) 2807 goto return_error; 2808 2809 ret = lan743x_csr_init(adapter); 2810 if (ret) 2811 goto cleanup_pci; 2812 2813 ret = lan743x_hardware_init(adapter, pdev); 2814 if (ret) 2815 goto cleanup_pci; 2816 2817 ret = lan743x_mdiobus_init(adapter); 2818 if (ret) 2819 goto cleanup_hardware; 2820 2821 adapter->netdev->netdev_ops = &lan743x_netdev_ops; 2822 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops; 2823 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM; 2824 adapter->netdev->hw_features = adapter->netdev->features; 2825 2826 /* carrier off reporting is important to ethtool even BEFORE open */ 2827 netif_carrier_off(netdev); 2828 2829 ret = register_netdev(adapter->netdev); 2830 if (ret < 0) 2831 goto cleanup_mdiobus; 2832 return 0; 2833 2834 cleanup_mdiobus: 2835 lan743x_mdiobus_cleanup(adapter); 2836 2837 cleanup_hardware: 2838 lan743x_hardware_cleanup(adapter); 2839 2840 cleanup_pci: 2841 lan743x_pci_cleanup(adapter); 2842 2843 return_error: 2844 pr_warn("Initialization failed\n"); 2845 return ret; 2846 } 2847 2848 /** 2849 * lan743x_pcidev_remove - Device Removal Routine 2850 * @pdev: PCI device information struct 2851 * 2852 * this is called by the PCI subsystem to alert the driver 2853 * that it should release a PCI device. This could be caused by a 2854 * Hot-Plug event, or because the driver is going to be removed from 2855 * memory. 2856 **/ 2857 static void lan743x_pcidev_remove(struct pci_dev *pdev) 2858 { 2859 struct net_device *netdev = pci_get_drvdata(pdev); 2860 struct lan743x_adapter *adapter = netdev_priv(netdev); 2861 2862 lan743x_full_cleanup(adapter); 2863 } 2864 2865 static void lan743x_pcidev_shutdown(struct pci_dev *pdev) 2866 { 2867 struct net_device *netdev = pci_get_drvdata(pdev); 2868 struct lan743x_adapter *adapter = netdev_priv(netdev); 2869 2870 rtnl_lock(); 2871 netif_device_detach(netdev); 2872 2873 /* close netdev when netdev is at running state. 2874 * For instance, it is true when system goes to sleep by pm-suspend 2875 * However, it is false when system goes to sleep by suspend GUI menu 2876 */ 2877 if (netif_running(netdev)) 2878 lan743x_netdev_close(netdev); 2879 rtnl_unlock(); 2880 2881 #ifdef CONFIG_PM 2882 pci_save_state(pdev); 2883 #endif 2884 2885 /* clean up lan743x portion */ 2886 lan743x_hardware_cleanup(adapter); 2887 } 2888 2889 #ifdef CONFIG_PM_SLEEP 2890 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len) 2891 { 2892 return bitrev16(crc16(0xFFFF, buf, len)); 2893 } 2894 2895 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter) 2896 { 2897 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E }; 2898 const u8 ipv6_multicast[3] = { 0x33, 0x33 }; 2899 const u8 arp_type[2] = { 0x08, 0x06 }; 2900 int mask_index; 2901 u32 pmtctl; 2902 u32 wucsr; 2903 u32 macrx; 2904 u16 crc; 2905 2906 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++) 2907 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0); 2908 2909 /* clear wake settings */ 2910 pmtctl = lan743x_csr_read(adapter, PMT_CTL); 2911 pmtctl |= PMT_CTL_WUPS_MASK_; 2912 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ | 2913 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ | 2914 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_); 2915 2916 macrx = lan743x_csr_read(adapter, MAC_RX); 2917 2918 wucsr = 0; 2919 mask_index = 0; 2920 2921 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_; 2922 2923 if (adapter->wolopts & WAKE_PHY) { 2924 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_; 2925 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_; 2926 } 2927 if (adapter->wolopts & WAKE_MAGIC) { 2928 wucsr |= MAC_WUCSR_MPEN_; 2929 macrx |= MAC_RX_RXEN_; 2930 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2931 } 2932 if (adapter->wolopts & WAKE_UCAST) { 2933 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_; 2934 macrx |= MAC_RX_RXEN_; 2935 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2936 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2937 } 2938 if (adapter->wolopts & WAKE_BCAST) { 2939 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_; 2940 macrx |= MAC_RX_RXEN_; 2941 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2942 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2943 } 2944 if (adapter->wolopts & WAKE_MCAST) { 2945 /* IPv4 multicast */ 2946 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3); 2947 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 2948 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ | 2949 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | 2950 (crc & MAC_WUF_CFG_CRC16_MASK_)); 2951 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7); 2952 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); 2953 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); 2954 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); 2955 mask_index++; 2956 2957 /* IPv6 multicast */ 2958 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2); 2959 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 2960 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ | 2961 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | 2962 (crc & MAC_WUF_CFG_CRC16_MASK_)); 2963 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3); 2964 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); 2965 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); 2966 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); 2967 mask_index++; 2968 2969 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_; 2970 macrx |= MAC_RX_RXEN_; 2971 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2972 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2973 } 2974 if (adapter->wolopts & WAKE_ARP) { 2975 /* set MAC_WUF_CFG & WUF_MASK 2976 * for packettype (offset 12,13) = ARP (0x0806) 2977 */ 2978 crc = lan743x_pm_wakeframe_crc16(arp_type, 2); 2979 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 2980 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ | 2981 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | 2982 (crc & MAC_WUF_CFG_CRC16_MASK_)); 2983 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000); 2984 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); 2985 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); 2986 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); 2987 mask_index++; 2988 2989 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_; 2990 macrx |= MAC_RX_RXEN_; 2991 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; 2992 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; 2993 } 2994 2995 lan743x_csr_write(adapter, MAC_WUCSR, wucsr); 2996 lan743x_csr_write(adapter, PMT_CTL, pmtctl); 2997 lan743x_csr_write(adapter, MAC_RX, macrx); 2998 } 2999 3000 static int lan743x_pm_suspend(struct device *dev) 3001 { 3002 struct pci_dev *pdev = to_pci_dev(dev); 3003 struct net_device *netdev = pci_get_drvdata(pdev); 3004 struct lan743x_adapter *adapter = netdev_priv(netdev); 3005 3006 lan743x_pcidev_shutdown(pdev); 3007 3008 /* clear all wakes */ 3009 lan743x_csr_write(adapter, MAC_WUCSR, 0); 3010 lan743x_csr_write(adapter, MAC_WUCSR2, 0); 3011 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF); 3012 3013 if (adapter->wolopts) 3014 lan743x_pm_set_wol(adapter); 3015 3016 /* Host sets PME_En, put D3hot */ 3017 return pci_prepare_to_sleep(pdev); 3018 } 3019 3020 static int lan743x_pm_resume(struct device *dev) 3021 { 3022 struct pci_dev *pdev = to_pci_dev(dev); 3023 struct net_device *netdev = pci_get_drvdata(pdev); 3024 struct lan743x_adapter *adapter = netdev_priv(netdev); 3025 int ret; 3026 3027 pci_set_power_state(pdev, PCI_D0); 3028 pci_restore_state(pdev); 3029 pci_save_state(pdev); 3030 3031 ret = lan743x_hardware_init(adapter, pdev); 3032 if (ret) { 3033 netif_err(adapter, probe, adapter->netdev, 3034 "lan743x_hardware_init returned %d\n", ret); 3035 lan743x_pci_cleanup(adapter); 3036 return ret; 3037 } 3038 3039 /* open netdev when netdev is at running state while resume. 3040 * For instance, it is true when system wakesup after pm-suspend 3041 * However, it is false when system wakes up after suspend GUI menu 3042 */ 3043 if (netif_running(netdev)) 3044 lan743x_netdev_open(netdev); 3045 3046 netif_device_attach(netdev); 3047 3048 return 0; 3049 } 3050 3051 static const struct dev_pm_ops lan743x_pm_ops = { 3052 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume) 3053 }; 3054 #endif /* CONFIG_PM_SLEEP */ 3055 3056 static const struct pci_device_id lan743x_pcidev_tbl[] = { 3057 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) }, 3058 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) }, 3059 { 0, } 3060 }; 3061 3062 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl); 3063 3064 static struct pci_driver lan743x_pcidev_driver = { 3065 .name = DRIVER_NAME, 3066 .id_table = lan743x_pcidev_tbl, 3067 .probe = lan743x_pcidev_probe, 3068 .remove = lan743x_pcidev_remove, 3069 #ifdef CONFIG_PM_SLEEP 3070 .driver.pm = &lan743x_pm_ops, 3071 #endif 3072 .shutdown = lan743x_pcidev_shutdown, 3073 }; 3074 3075 module_pci_driver(lan743x_pcidev_driver); 3076 3077 MODULE_AUTHOR(DRIVER_AUTHOR); 3078 MODULE_DESCRIPTION(DRIVER_DESC); 3079 MODULE_LICENSE("GPL"); 3080