1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* Copyright (C) 2018 Microchip Technology Inc. */
4 #include <linux/module.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"
21 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
23 pci_release_selected_regions(adapter->pdev,
24 pci_select_bars(adapter->pdev,
26 pci_disable_device(adapter->pdev);
29 static int lan743x_pci_init(struct lan743x_adapter *adapter,
32 unsigned long bars = 0;
36 ret = pci_enable_device_mem(pdev);
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))
47 ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
55 pci_disable_device(adapter->pdev);
61 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
63 return ioread32(&adapter->csr.csr_address[offset]);
66 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
69 iowrite32(data, &adapter->csr.csr_address[offset]);
72 #define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset)
74 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
78 data = lan743x_csr_read(adapter, HW_CFG);
80 lan743x_csr_write(adapter, HW_CFG, data);
82 return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
83 !(data & HW_CFG_LRST_), 100000, 10000000);
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)
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);
98 static int lan743x_csr_init(struct lan743x_adapter *adapter)
100 struct lan743x_csr *csr = &adapter->csr;
101 resource_size_t bar_start, bar_length;
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) {
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)) {
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;
130 case ID_REV_CHIP_REV_B0_:
131 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
135 result = lan743x_csr_light_reset(adapter);
143 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter)
145 struct lan743x_intr *intr = &adapter->intr;
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);
153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
155 struct lan743x_tx *tx = context;
156 struct lan743x_adapter *adapter = tx->adapter;
157 bool enable_flag = true;
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));
165 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
166 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
170 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
171 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
173 dmac_int_sts = ioc_bit;
174 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
175 dmac_int_en = lan743x_csr_read(adapter,
178 dmac_int_en = ioc_bit;
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 */
190 lan743x_csr_write(adapter, INT_EN_SET,
191 INT_BIT_DMA_TX_(tx->channel_number));
194 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
196 struct lan743x_rx *rx = context;
197 struct lan743x_adapter *adapter = rx->adapter;
198 bool enable_flag = true;
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));
205 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
206 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
210 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
211 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
213 dmac_int_sts = rx_frame_bit;
214 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
215 dmac_int_en = lan743x_csr_read(adapter,
218 dmac_int_en = rx_frame_bit;
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 */
230 lan743x_csr_write(adapter, INT_EN_SET,
231 INT_BIT_DMA_RX_(rx->channel_number));
235 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
237 struct lan743x_adapter *adapter = context;
238 unsigned int channel;
240 if (int_sts & INT_BIT_ALL_RX_) {
241 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
243 u32 int_bit = INT_BIT_DMA_RX_(channel);
245 if (int_sts & int_bit) {
246 lan743x_rx_isr(&adapter->rx[channel],
252 if (int_sts & INT_BIT_ALL_TX_) {
253 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
255 u32 int_bit = INT_BIT_DMA_TX_(channel);
257 if (int_sts & int_bit) {
258 lan743x_tx_isr(&adapter->tx[channel],
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_;
269 if (int_sts & INT_BIT_1588_) {
270 lan743x_ptp_isr(adapter);
271 int_sts &= ~INT_BIT_1588_;
275 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
278 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
280 struct lan743x_vector *vector = ptr;
281 struct lan743x_adapter *adapter = vector->adapter;
282 irqreturn_t result = IRQ_NONE;
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);
293 /* use mask as implied status */
294 int_sts = vector->int_mask | INT_BIT_MAS_;
297 if (!(int_sts & INT_BIT_MAS_))
300 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
301 /* disable vector interrupt */
302 lan743x_csr_write(adapter,
304 INT_VEC_EN_(vector->vector_index));
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_);
310 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
311 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
313 /* use vector mask as implied enable mask */
314 int_enables = vector->int_mask;
317 int_sts &= int_enables;
318 int_sts &= vector->int_mask;
320 if (vector->handler) {
321 vector->handler(vector->context,
322 int_sts, vector->flags);
324 /* disable interrupts on this vector */
325 lan743x_csr_write(adapter, INT_EN_CLR,
328 result = IRQ_HANDLED;
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_);
335 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
336 /* enable vector interrupt */
337 lan743x_csr_write(adapter,
339 INT_VEC_EN_(vector->vector_index));
344 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
346 struct lan743x_intr *intr = &adapter->intr;
349 intr->software_isr_flag = false;
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_);
355 ret = wait_event_timeout(intr->software_isr_wq,
356 intr->software_isr_flag,
357 msecs_to_jiffies(200));
359 /* disable test interrupt */
360 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
362 return ret > 0 ? 0 : -ENODEV;
365 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
366 int vector_index, u32 flags,
368 lan743x_vector_handler handler,
371 struct lan743x_vector *vector = &adapter->intr.vector_list
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;
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);
387 vector->handler = NULL;
388 vector->context = NULL;
389 vector->int_mask = 0;
395 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
398 struct lan743x_vector *vector = &adapter->intr.vector_list
401 free_irq(vector->irq, vector);
402 vector->handler = NULL;
403 vector->context = NULL;
404 vector->int_mask = 0;
408 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
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;
420 static void lan743x_intr_close(struct lan743x_adapter *adapter)
422 struct lan743x_intr *intr = &adapter->intr;
425 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
426 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
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);
435 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
436 pci_disable_msi(adapter->pdev);
437 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
440 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
441 pci_disable_msix(adapter->pdev);
442 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
446 static int lan743x_intr_open(struct lan743x_adapter *adapter)
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;
457 intr->number_of_vectors = 0;
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,
466 1 + LAN743X_USED_TX_CHANNELS +
467 LAN743X_USED_RX_CHANNELS);
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
476 netif_info(adapter, ifup, adapter->netdev,
477 "using MSIX interrupts, number of vectors = %d\n",
478 intr->number_of_vectors);
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 =
490 netif_info(adapter, ifup, adapter->netdev,
491 "using MSI interrupts, number of vectors = %d\n",
492 intr->number_of_vectors);
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");
506 /* At this point we must have at least one irq */
507 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
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;
518 if (intr->using_vectors) {
519 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
520 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
522 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
523 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
524 LAN743X_VECTOR_FLAG_IRQ_SHARED;
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;
536 init_waitqueue_head(&intr->software_isr_wq);
538 ret = lan743x_intr_register_isr(adapter, 0, flags,
539 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
541 lan743x_intr_shared_isr, adapter);
544 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
546 if (intr->using_vectors)
547 lan743x_csr_write(adapter, INT_VEC_EN_SET,
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);
564 /* enable interrupts */
565 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
566 ret = lan743x_intr_test_isr(adapter);
570 if (intr->number_of_vectors > 1) {
571 int number_of_tx_vectors = intr->number_of_vectors - 1;
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;
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;
590 for (index = 0; index < number_of_tx_vectors; index++) {
591 u32 int_bit = INT_BIT_DMA_TX_(index);
592 int vector = index + 1;
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);
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]);
605 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
607 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
608 lan743x_csr_write(adapter, INT_VEC_EN_SET,
609 INT_VEC_EN_(vector));
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;
616 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
617 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
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;
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;
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);
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);
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);
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]);
655 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
657 lan743x_csr_write(adapter, INT_VEC_EN_SET,
658 INT_VEC_EN_(vector));
664 lan743x_intr_close(adapter);
668 static int lan743x_dp_write(struct lan743x_adapter *adapter,
669 u32 select, u32 addr, u32 length, u32 *buf)
674 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
677 dp_sel = lan743x_csr_read(adapter, DP_SEL);
678 dp_sel &= ~DP_SEL_MASK_;
680 lan743x_csr_write(adapter, DP_SEL, dp_sel);
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_,
694 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
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_;
704 ret |= MAC_MII_ACC_MII_READ_;
706 ret |= MAC_MII_ACC_MII_WRITE_;
707 ret |= MAC_MII_ACC_MII_BUSY_;
712 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
716 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
717 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
720 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
722 struct lan743x_adapter *adapter = bus->priv;
726 /* comfirm MII not busy */
727 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
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);
738 val = lan743x_csr_read(adapter, MAC_MII_DATA);
739 return (int)(val & 0xFFFF);
742 static int lan743x_mdiobus_write(struct mii_bus *bus,
743 int phy_id, int index, u16 regval)
745 struct lan743x_adapter *adapter = bus->priv;
749 /* confirm MII not busy */
750 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
754 lan743x_csr_write(adapter, MAC_MII_DATA, val);
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);
763 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
766 u32 addr_lo, addr_hi;
774 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
775 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
777 ether_addr_copy(adapter->mac_address, addr);
778 netif_info(adapter, drv, adapter->netdev,
779 "MAC address set to %pM\n", addr);
782 static int lan743x_mac_init(struct lan743x_adapter *adapter)
784 bool mac_address_valid = true;
785 struct net_device *netdev;
790 netdev = adapter->netdev;
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);
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;
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;
815 if (!mac_address_valid)
816 eth_random_addr(adapter->mac_address);
818 lan743x_mac_set_address(adapter, adapter->mac_address);
819 ether_addr_copy(netdev->dev_addr, adapter->mac_address);
824 static int lan743x_mac_open(struct lan743x_adapter *adapter)
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_);
835 static void lan743x_mac_close(struct lan743x_adapter *adapter)
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);
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);
852 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
853 bool tx_enable, bool rx_enable)
855 u32 flow_setting = 0;
857 /* set maximum pause time because when fifo space frees
858 * up a zero value pause frame will be sent to release the pause
860 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
862 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
864 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
865 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
868 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
873 mac_rx = lan743x_csr_read(adapter, MAC_RX);
874 if (mac_rx & MAC_RX_RXEN_) {
876 if (mac_rx & MAC_RX_RXD_) {
877 lan743x_csr_write(adapter, MAC_RX, mac_rx);
878 mac_rx &= ~MAC_RX_RXD_;
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_);
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);
893 mac_rx |= MAC_RX_RXEN_;
894 lan743x_csr_write(adapter, MAC_RX, mac_rx);
900 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
904 /* Only called with in probe, and before mdiobus_register */
906 data = lan743x_csr_read(adapter, PMT_CTL);
907 data |= PMT_CTL_ETH_PHY_RST_;
908 lan743x_csr_write(adapter, PMT_CTL, data);
910 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
911 (!(data & PMT_CTL_ETH_PHY_RST_) &&
912 (data & PMT_CTL_READY_)),
916 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
917 u8 duplex, u16 local_adv,
920 struct lan743x_phy *phy = &adapter->phy;
924 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
926 cap = phy->fc_request_control;
928 lan743x_mac_flow_ctrl_set_enables(adapter,
933 static int lan743x_phy_init(struct lan743x_adapter *adapter)
935 return lan743x_phy_reset(adapter);
938 static void lan743x_phy_link_status_change(struct net_device *netdev)
940 struct lan743x_adapter *adapter = netdev_priv(netdev);
941 struct phy_device *phydev = netdev->phydev;
944 phy_print_status(phydev);
945 if (phydev->state == PHY_RUNNING) {
946 struct ethtool_link_ksettings ksettings;
947 int remote_advertisement = 0;
948 int local_advertisement = 0;
950 data = lan743x_csr_read(adapter, MAC_CR);
952 /* set interface mode */
953 if (phy_interface_is_rgmii(phydev))
955 data &= ~MAC_CR_MII_EN_;
958 data |= MAC_CR_MII_EN_;
960 /* set duplex mode */
964 data &= ~MAC_CR_DPX_;
967 switch (phydev->speed) {
969 data &= ~MAC_CR_CFG_H_;
970 data &= ~MAC_CR_CFG_L_;
973 data &= ~MAC_CR_CFG_H_;
974 data |= MAC_CR_CFG_L_;
977 data |= MAC_CR_CFG_H_;
978 data &= ~MAC_CR_CFG_L_;
981 lan743x_csr_write(adapter, MAC_CR, data);
983 memset(&ksettings, 0, sizeof(ksettings));
984 phy_ethtool_get_link_ksettings(netdev, &ksettings);
985 local_advertisement =
986 linkmode_adv_to_mii_adv_t(phydev->advertising);
987 remote_advertisement =
988 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
990 lan743x_phy_update_flowcontrol(adapter,
991 ksettings.base.duplex,
993 remote_advertisement);
994 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
998 static void lan743x_phy_close(struct lan743x_adapter *adapter)
1000 struct net_device *netdev = adapter->netdev;
1002 phy_stop(netdev->phydev);
1003 phy_disconnect(netdev->phydev);
1004 netdev->phydev = NULL;
1007 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1009 struct net_device *netdev = adapter->netdev;
1010 struct lan743x_phy *phy = &adapter->phy;
1011 struct phy_device *phydev;
1014 /* try devicetree phy, or fixed link */
1015 phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1016 lan743x_phy_link_status_change);
1019 /* try internal phy */
1020 phydev = phy_find_first(adapter->mdiobus);
1024 ret = phy_connect_direct(netdev, phydev,
1025 lan743x_phy_link_status_change,
1026 PHY_INTERFACE_MODE_GMII);
1031 /* MAC doesn't support 1000T Half */
1032 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1034 /* support both flow controls */
1035 phy_support_asym_pause(phydev);
1036 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1037 phy->fc_autoneg = phydev->autoneg;
1040 phy_start_aneg(phydev);
1041 phy_attached_info(phydev);
1048 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1050 lan743x_csr_write(adapter, RFE_RSS_CFG,
1051 RFE_RSS_CFG_UDP_IPV6_EX_ |
1052 RFE_RSS_CFG_TCP_IPV6_EX_ |
1053 RFE_RSS_CFG_IPV6_EX_ |
1054 RFE_RSS_CFG_UDP_IPV6_ |
1055 RFE_RSS_CFG_TCP_IPV6_ |
1057 RFE_RSS_CFG_UDP_IPV4_ |
1058 RFE_RSS_CFG_TCP_IPV4_ |
1060 RFE_RSS_CFG_VALID_HASH_BITS_ |
1061 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1062 RFE_RSS_CFG_RSS_HASH_STORE_ |
1063 RFE_RSS_CFG_RSS_ENABLE_);
1066 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1069 u32 mac_addr_hi = 0;
1070 u32 mac_addr_lo = 0;
1072 /* Add mac address to perfect Filter */
1073 mac_addr = adapter->mac_address;
1074 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1075 (((u32)(mac_addr[1])) << 8) |
1076 (((u32)(mac_addr[2])) << 16) |
1077 (((u32)(mac_addr[3])) << 24));
1078 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1079 (((u32)(mac_addr[5])) << 8));
1081 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1082 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1083 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1086 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1088 struct net_device *netdev = adapter->netdev;
1089 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1093 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1094 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1095 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1096 rfctl |= RFE_CTL_AB_;
1097 if (netdev->flags & IFF_PROMISC) {
1098 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1100 if (netdev->flags & IFF_ALLMULTI)
1101 rfctl |= RFE_CTL_AM_;
1104 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1105 if (netdev_mc_count(netdev)) {
1106 struct netdev_hw_addr *ha;
1109 rfctl |= RFE_CTL_DA_PERFECT_;
1111 netdev_for_each_mc_addr(ha, netdev) {
1112 /* set first 32 into Perfect Filter */
1114 lan743x_csr_write(adapter,
1115 RFE_ADDR_FILT_HI(i), 0);
1117 data = ha->addr[2] | (data << 8);
1118 data = ha->addr[1] | (data << 8);
1119 data = ha->addr[0] | (data << 8);
1120 lan743x_csr_write(adapter,
1121 RFE_ADDR_FILT_LO(i), data);
1123 data = ha->addr[4] | (data << 8);
1124 data |= RFE_ADDR_FILT_HI_VALID_;
1125 lan743x_csr_write(adapter,
1126 RFE_ADDR_FILT_HI(i), data);
1128 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1130 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1131 rfctl |= RFE_CTL_MCAST_HASH_;
1137 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1138 DP_SEL_VHF_VLAN_LEN,
1139 DP_SEL_VHF_HASH_LEN, hash_table);
1140 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1143 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1147 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1148 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1149 0, 1000, 20000, 100);
1150 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1151 case DMA_DESCRIPTOR_SPACING_16:
1152 data = DMAC_CFG_MAX_DSPACE_16_;
1154 case DMA_DESCRIPTOR_SPACING_32:
1155 data = DMAC_CFG_MAX_DSPACE_32_;
1157 case DMA_DESCRIPTOR_SPACING_64:
1158 data = DMAC_CFG_MAX_DSPACE_64_;
1160 case DMA_DESCRIPTOR_SPACING_128:
1161 data = DMAC_CFG_MAX_DSPACE_128_;
1166 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1167 data |= DMAC_CFG_COAL_EN_;
1168 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1169 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1170 lan743x_csr_write(adapter, DMAC_CFG, data);
1171 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1172 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1173 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1174 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1175 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1176 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1177 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1178 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1179 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1180 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1181 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1185 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1190 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1191 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1192 DMAC_CMD_START_T_(tx_channel)),
1194 DMAC_CMD_STOP_T_(tx_channel)));
1197 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1204 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1205 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1206 usleep_range(1000, 20000);
1209 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1214 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1219 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1220 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1221 DMAC_CMD_START_R_(rx_channel)),
1223 DMAC_CMD_STOP_R_(rx_channel)));
1226 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1233 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1234 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1235 usleep_range(1000, 20000);
1238 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1243 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1244 int descriptor_index, bool cleanup)
1246 struct lan743x_tx_buffer_info *buffer_info = NULL;
1247 struct lan743x_tx_descriptor *descriptor = NULL;
1248 u32 descriptor_type = 0;
1251 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1252 buffer_info = &tx->buffer_info[descriptor_index];
1253 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1256 descriptor_type = le32_to_cpu(descriptor->data0) &
1257 TX_DESC_DATA0_DTYPE_MASK_;
1258 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1259 goto clean_up_data_descriptor;
1263 clean_up_data_descriptor:
1264 if (buffer_info->dma_ptr) {
1265 if (buffer_info->flags &
1266 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1267 dma_unmap_page(&tx->adapter->pdev->dev,
1268 buffer_info->dma_ptr,
1269 buffer_info->buffer_length,
1272 dma_unmap_single(&tx->adapter->pdev->dev,
1273 buffer_info->dma_ptr,
1274 buffer_info->buffer_length,
1277 buffer_info->dma_ptr = 0;
1278 buffer_info->buffer_length = 0;
1280 if (!buffer_info->skb)
1283 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1284 dev_kfree_skb_any(buffer_info->skb);
1289 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1290 dev_kfree_skb_any(buffer_info->skb);
1292 ignore_sync = (buffer_info->flags &
1293 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1294 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1295 buffer_info->skb, ignore_sync);
1299 buffer_info->skb = NULL;
1302 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1305 memset(buffer_info, 0, sizeof(*buffer_info));
1306 memset(descriptor, 0, sizeof(*descriptor));
1309 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1311 return ((++index) % tx->ring_size);
1314 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1316 while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1317 lan743x_tx_release_desc(tx, tx->last_head, false);
1318 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1322 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1324 u32 original_head = 0;
1326 original_head = tx->last_head;
1328 lan743x_tx_release_desc(tx, tx->last_head, true);
1329 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1330 } while (tx->last_head != original_head);
1331 memset(tx->ring_cpu_ptr, 0,
1332 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1333 memset(tx->buffer_info, 0,
1334 sizeof(*tx->buffer_info) * (tx->ring_size));
1337 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1338 struct sk_buff *skb)
1340 int result = 1; /* 1 for the main skb buffer */
1343 if (skb_is_gso(skb))
1344 result++; /* requires an extension descriptor */
1345 nr_frags = skb_shinfo(skb)->nr_frags;
1346 result += nr_frags; /* 1 for each fragment buffer */
1350 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1352 int last_head = tx->last_head;
1353 int last_tail = tx->last_tail;
1355 if (last_tail >= last_head)
1356 return tx->ring_size - last_tail + last_head - 1;
1358 return last_head - last_tail - 1;
1361 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1362 bool enable_timestamping,
1363 bool enable_onestep_sync)
1365 if (enable_timestamping)
1366 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1368 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1369 if (enable_onestep_sync)
1370 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1372 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1375 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1376 unsigned char *first_buffer,
1377 unsigned int first_buffer_length,
1378 unsigned int frame_length,
1382 /* called only from within lan743x_tx_xmit_frame.
1383 * assuming tx->ring_lock has already been acquired.
1385 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1386 struct lan743x_tx_buffer_info *buffer_info = NULL;
1387 struct lan743x_adapter *adapter = tx->adapter;
1388 struct device *dev = &adapter->pdev->dev;
1391 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1392 tx->frame_first = tx->last_tail;
1393 tx->frame_tail = tx->frame_first;
1395 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1396 buffer_info = &tx->buffer_info[tx->frame_tail];
1397 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1399 if (dma_mapping_error(dev, dma_ptr))
1402 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1403 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1404 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1405 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1407 buffer_info->skb = NULL;
1408 buffer_info->dma_ptr = dma_ptr;
1409 buffer_info->buffer_length = first_buffer_length;
1410 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1412 tx->frame_data0 = (first_buffer_length &
1413 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1414 TX_DESC_DATA0_DTYPE_DATA_ |
1418 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1421 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1422 TX_DESC_DATA0_IPE_ |
1425 /* data0 will be programmed in one of other frame assembler functions */
1429 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1430 unsigned int frame_length,
1433 /* called only from within lan743x_tx_xmit_frame.
1434 * assuming tx->ring_lock has already been acquired.
1436 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1437 struct lan743x_tx_buffer_info *buffer_info = NULL;
1439 /* wrap up previous descriptor */
1440 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1441 if (nr_frags <= 0) {
1442 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1443 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1445 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1446 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1448 /* move to next descriptor */
1449 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1450 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1451 buffer_info = &tx->buffer_info[tx->frame_tail];
1453 /* add extension descriptor */
1454 tx_descriptor->data1 = 0;
1455 tx_descriptor->data2 = 0;
1456 tx_descriptor->data3 = 0;
1458 buffer_info->skb = NULL;
1459 buffer_info->dma_ptr = 0;
1460 buffer_info->buffer_length = 0;
1461 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1463 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1464 TX_DESC_DATA0_DTYPE_EXT_ |
1465 TX_DESC_DATA0_EXT_LSO_;
1467 /* data0 will be programmed in one of other frame assembler functions */
1470 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1471 const skb_frag_t *fragment,
1472 unsigned int frame_length)
1474 /* called only from within lan743x_tx_xmit_frame
1475 * assuming tx->ring_lock has already been acquired
1477 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1478 struct lan743x_tx_buffer_info *buffer_info = NULL;
1479 struct lan743x_adapter *adapter = tx->adapter;
1480 struct device *dev = &adapter->pdev->dev;
1481 unsigned int fragment_length = 0;
1484 fragment_length = skb_frag_size(fragment);
1485 if (!fragment_length)
1488 /* wrap up previous descriptor */
1489 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1490 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1492 /* move to next descriptor */
1493 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1494 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1495 buffer_info = &tx->buffer_info[tx->frame_tail];
1496 dma_ptr = skb_frag_dma_map(dev, fragment,
1499 if (dma_mapping_error(dev, dma_ptr)) {
1502 /* cleanup all previously setup descriptors */
1503 desc_index = tx->frame_first;
1504 while (desc_index != tx->frame_tail) {
1505 lan743x_tx_release_desc(tx, desc_index, true);
1506 desc_index = lan743x_tx_next_index(tx, desc_index);
1509 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1510 tx->frame_first = 0;
1511 tx->frame_data0 = 0;
1516 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1517 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1518 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1519 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1521 buffer_info->skb = NULL;
1522 buffer_info->dma_ptr = dma_ptr;
1523 buffer_info->buffer_length = fragment_length;
1524 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1525 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1527 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1528 TX_DESC_DATA0_DTYPE_DATA_ |
1531 /* data0 will be programmed in one of other frame assembler functions */
1535 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1536 struct sk_buff *skb,
1540 /* called only from within lan743x_tx_xmit_frame
1541 * assuming tx->ring_lock has already been acquired
1543 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1544 struct lan743x_tx_buffer_info *buffer_info = NULL;
1545 struct lan743x_adapter *adapter = tx->adapter;
1546 u32 tx_tail_flags = 0;
1548 /* wrap up previous descriptor */
1549 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1550 TX_DESC_DATA0_DTYPE_DATA_) {
1551 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1552 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1555 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1556 buffer_info = &tx->buffer_info[tx->frame_tail];
1557 buffer_info->skb = skb;
1559 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1561 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1563 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1564 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1565 tx->last_tail = tx->frame_tail;
1569 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1570 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1571 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1572 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1573 TX_TAIL_SET_TOP_INT_EN_;
1575 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1576 tx_tail_flags | tx->frame_tail);
1577 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1580 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1581 struct sk_buff *skb)
1583 int required_number_of_descriptors = 0;
1584 unsigned int start_frame_length = 0;
1585 unsigned int frame_length = 0;
1586 unsigned int head_length = 0;
1587 unsigned long irq_flags = 0;
1588 bool do_timestamp = false;
1589 bool ignore_sync = false;
1594 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1596 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1597 if (required_number_of_descriptors >
1598 lan743x_tx_get_avail_desc(tx)) {
1599 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1600 dev_kfree_skb_irq(skb);
1602 /* save to overflow buffer */
1603 tx->overflow_skb = skb;
1604 netif_stop_queue(tx->adapter->netdev);
1609 /* space available, transmit skb */
1610 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1611 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1612 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1613 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1614 do_timestamp = true;
1615 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1618 head_length = skb_headlen(skb);
1619 frame_length = skb_pagelen(skb);
1620 nr_frags = skb_shinfo(skb)->nr_frags;
1621 start_frame_length = frame_length;
1622 gso = skb_is_gso(skb);
1624 start_frame_length = max(skb_shinfo(skb)->gso_size,
1628 if (lan743x_tx_frame_start(tx,
1629 skb->data, head_length,
1632 skb->ip_summed == CHECKSUM_PARTIAL)) {
1633 dev_kfree_skb_irq(skb);
1638 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1643 for (j = 0; j < nr_frags; j++) {
1644 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1646 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1647 /* upon error no need to call
1648 * lan743x_tx_frame_end
1649 * frame assembler clean up was performed inside
1650 * lan743x_tx_frame_add_fragment
1652 dev_kfree_skb_irq(skb);
1658 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1661 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1662 return NETDEV_TX_OK;
1665 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1667 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1668 struct lan743x_adapter *adapter = tx->adapter;
1669 bool start_transmitter = false;
1670 unsigned long irq_flags = 0;
1673 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1674 lan743x_csr_read(adapter, DMAC_INT_STS);
1675 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1676 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1677 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1679 /* clean up tx ring */
1680 lan743x_tx_release_completed_descriptors(tx);
1681 if (netif_queue_stopped(adapter->netdev)) {
1682 if (tx->overflow_skb) {
1683 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1684 lan743x_tx_get_avail_desc(tx))
1685 start_transmitter = true;
1687 netif_wake_queue(adapter->netdev);
1690 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1692 if (start_transmitter) {
1693 /* space is now available, transmit overflow skb */
1694 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1695 tx->overflow_skb = NULL;
1696 netif_wake_queue(adapter->netdev);
1699 if (!napi_complete(napi))
1703 lan743x_csr_write(adapter, INT_EN_SET,
1704 INT_BIT_DMA_TX_(tx->channel_number));
1705 lan743x_csr_read(adapter, INT_STS);
1711 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1713 if (tx->head_cpu_ptr) {
1714 dma_free_coherent(&tx->adapter->pdev->dev,
1715 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1717 tx->head_cpu_ptr = NULL;
1718 tx->head_dma_ptr = 0;
1720 kfree(tx->buffer_info);
1721 tx->buffer_info = NULL;
1723 if (tx->ring_cpu_ptr) {
1724 dma_free_coherent(&tx->adapter->pdev->dev,
1725 tx->ring_allocation_size, tx->ring_cpu_ptr,
1727 tx->ring_allocation_size = 0;
1728 tx->ring_cpu_ptr = NULL;
1729 tx->ring_dma_ptr = 0;
1734 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1736 size_t ring_allocation_size = 0;
1737 void *cpu_ptr = NULL;
1741 tx->ring_size = LAN743X_TX_RING_SIZE;
1742 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1746 ring_allocation_size = ALIGN(tx->ring_size *
1747 sizeof(struct lan743x_tx_descriptor),
1750 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1751 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1757 tx->ring_allocation_size = ring_allocation_size;
1758 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1759 tx->ring_dma_ptr = dma_ptr;
1761 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1766 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1768 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1769 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1776 tx->head_cpu_ptr = cpu_ptr;
1777 tx->head_dma_ptr = dma_ptr;
1778 if (tx->head_dma_ptr & 0x3) {
1786 lan743x_tx_ring_cleanup(tx);
1790 static void lan743x_tx_close(struct lan743x_tx *tx)
1792 struct lan743x_adapter *adapter = tx->adapter;
1794 lan743x_csr_write(adapter,
1796 DMAC_CMD_STOP_T_(tx->channel_number));
1797 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1799 lan743x_csr_write(adapter,
1801 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1802 lan743x_csr_write(adapter, INT_EN_CLR,
1803 INT_BIT_DMA_TX_(tx->channel_number));
1804 napi_disable(&tx->napi);
1805 netif_napi_del(&tx->napi);
1807 lan743x_csr_write(adapter, FCT_TX_CTL,
1808 FCT_TX_CTL_DIS_(tx->channel_number));
1809 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1810 FCT_TX_CTL_EN_(tx->channel_number),
1811 0, 1000, 20000, 100);
1813 lan743x_tx_release_all_descriptors(tx);
1815 if (tx->overflow_skb) {
1816 dev_kfree_skb(tx->overflow_skb);
1817 tx->overflow_skb = NULL;
1820 lan743x_tx_ring_cleanup(tx);
1823 static int lan743x_tx_open(struct lan743x_tx *tx)
1825 struct lan743x_adapter *adapter = NULL;
1829 adapter = tx->adapter;
1830 ret = lan743x_tx_ring_init(tx);
1834 /* initialize fifo */
1835 lan743x_csr_write(adapter, FCT_TX_CTL,
1836 FCT_TX_CTL_RESET_(tx->channel_number));
1837 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1838 FCT_TX_CTL_RESET_(tx->channel_number),
1839 0, 1000, 20000, 100);
1842 lan743x_csr_write(adapter, FCT_TX_CTL,
1843 FCT_TX_CTL_EN_(tx->channel_number));
1845 /* reset tx channel */
1846 lan743x_csr_write(adapter, DMAC_CMD,
1847 DMAC_CMD_TX_SWR_(tx->channel_number));
1848 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1849 DMAC_CMD_TX_SWR_(tx->channel_number),
1850 0, 1000, 20000, 100);
1852 /* Write TX_BASE_ADDR */
1853 lan743x_csr_write(adapter,
1854 TX_BASE_ADDRH(tx->channel_number),
1855 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1856 lan743x_csr_write(adapter,
1857 TX_BASE_ADDRL(tx->channel_number),
1858 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1860 /* Write TX_CFG_B */
1861 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1862 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1863 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1864 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1865 data |= TX_CFG_B_TDMABL_512_;
1866 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1868 /* Write TX_CFG_A */
1869 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1870 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1871 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1872 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1873 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1874 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1876 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1878 /* Write TX_HEAD_WRITEBACK_ADDR */
1879 lan743x_csr_write(adapter,
1880 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1881 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1882 lan743x_csr_write(adapter,
1883 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1884 DMA_ADDR_LOW32(tx->head_dma_ptr));
1887 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1891 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1892 (u32)(tx->last_tail));
1893 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1895 (tx->channel_number));
1896 netif_tx_napi_add(adapter->netdev,
1897 &tx->napi, lan743x_tx_napi_poll,
1899 napi_enable(&tx->napi);
1902 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1903 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1904 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1905 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1906 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1907 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1908 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1909 data |= TX_CFG_C_TX_INT_EN_R2C_;
1910 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1912 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1913 lan743x_csr_write(adapter, INT_EN_SET,
1914 INT_BIT_DMA_TX_(tx->channel_number));
1915 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1916 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1918 /* start dmac channel */
1919 lan743x_csr_write(adapter, DMAC_CMD,
1920 DMAC_CMD_START_T_(tx->channel_number));
1924 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1926 return ((++index) % rx->ring_size);
1929 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
1931 /* update the tail once per 8 descriptors */
1932 if ((index & 7) == 7)
1933 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
1937 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index)
1939 struct net_device *netdev = rx->adapter->netdev;
1940 struct device *dev = &rx->adapter->pdev->dev;
1941 struct lan743x_rx_buffer_info *buffer_info;
1942 unsigned int buffer_length, used_length;
1943 struct lan743x_rx_descriptor *descriptor;
1944 struct sk_buff *skb;
1947 buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
1949 descriptor = &rx->ring_cpu_ptr[index];
1950 buffer_info = &rx->buffer_info[index];
1951 skb = __netdev_alloc_skb(netdev, buffer_length, GFP_ATOMIC | GFP_DMA);
1954 dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
1955 if (dma_mapping_error(dev, dma_ptr)) {
1956 dev_kfree_skb_any(skb);
1959 if (buffer_info->dma_ptr) {
1960 /* sync used area of buffer only */
1961 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
1962 /* frame length is valid only if LS bit is set.
1963 * it's a safe upper bound for the used area in this
1966 used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
1967 (le32_to_cpu(descriptor->data0)),
1968 buffer_info->buffer_length);
1970 used_length = buffer_info->buffer_length;
1971 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
1974 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
1975 buffer_info->buffer_length,
1977 DMA_ATTR_SKIP_CPU_SYNC);
1980 buffer_info->skb = skb;
1981 buffer_info->dma_ptr = dma_ptr;
1982 buffer_info->buffer_length = buffer_length;
1983 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
1984 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
1985 descriptor->data3 = 0;
1986 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
1987 (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
1988 lan743x_rx_update_tail(rx, index);
1993 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1995 struct lan743x_rx_buffer_info *buffer_info;
1996 struct lan743x_rx_descriptor *descriptor;
1998 descriptor = &rx->ring_cpu_ptr[index];
1999 buffer_info = &rx->buffer_info[index];
2001 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2002 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2003 descriptor->data3 = 0;
2004 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2005 ((buffer_info->buffer_length) &
2006 RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2007 lan743x_rx_update_tail(rx, index);
2010 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2012 struct lan743x_rx_buffer_info *buffer_info;
2013 struct lan743x_rx_descriptor *descriptor;
2015 descriptor = &rx->ring_cpu_ptr[index];
2016 buffer_info = &rx->buffer_info[index];
2018 memset(descriptor, 0, sizeof(*descriptor));
2020 if (buffer_info->dma_ptr) {
2021 dma_unmap_single(&rx->adapter->pdev->dev,
2022 buffer_info->dma_ptr,
2023 buffer_info->buffer_length,
2025 buffer_info->dma_ptr = 0;
2028 if (buffer_info->skb) {
2029 dev_kfree_skb(buffer_info->skb);
2030 buffer_info->skb = NULL;
2033 memset(buffer_info, 0, sizeof(*buffer_info));
2036 static struct sk_buff *
2037 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2039 if (skb_linearize(skb)) {
2040 dev_kfree_skb_irq(skb);
2043 frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2044 if (skb->len > frame_length) {
2045 skb->tail -= skb->len - frame_length;
2046 skb->len = frame_length;
2051 static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2053 int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2054 struct lan743x_rx_descriptor *descriptor, *desc_ext;
2055 struct net_device *netdev = rx->adapter->netdev;
2056 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2057 struct lan743x_rx_buffer_info *buffer_info;
2058 int frame_length, buffer_length;
2059 int extension_index = -1;
2060 bool is_last, is_first;
2061 struct sk_buff *skb;
2063 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2066 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2069 if (rx->last_head == current_head_index)
2072 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2073 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2075 buffer_info = &rx->buffer_info[rx->last_head];
2077 is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2078 is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2080 if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2081 /* extension is expected to follow */
2082 int index = lan743x_rx_next_index(rx, rx->last_head);
2084 if (index == current_head_index)
2085 /* extension not yet available */
2087 desc_ext = &rx->ring_cpu_ptr[index];
2088 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2089 /* extension not yet available */
2091 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2093 extension_index = index;
2096 /* Only the last buffer in a multi-buffer frame contains the total frame
2097 * length. The chip occasionally sends more buffers than strictly
2098 * required to reach the total frame length.
2099 * Handle this by adding all buffers to the skb in their entirety.
2100 * Once the real frame length is known, trim the skb.
2103 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2104 buffer_length = buffer_info->buffer_length;
2106 netdev_dbg(netdev, "%s%schunk: %d/%d",
2107 is_first ? "first " : " ",
2108 is_last ? "last " : " ",
2109 frame_length, buffer_length);
2111 /* save existing skb, allocate new skb and map to dma */
2112 skb = buffer_info->skb;
2113 if (lan743x_rx_init_ring_element(rx, rx->last_head)) {
2114 /* failed to allocate next skb.
2115 * Memory is very low.
2116 * Drop this packet and reuse buffer.
2118 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2119 /* drop packet that was being assembled */
2120 dev_kfree_skb_irq(rx->skb_head);
2121 rx->skb_head = NULL;
2122 goto process_extension;
2125 /* add buffers to skb via skb->frag_list */
2127 skb_reserve(skb, RX_HEAD_PADDING);
2128 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2130 dev_kfree_skb_irq(rx->skb_head);
2132 } else if (rx->skb_head) {
2133 skb_put(skb, buffer_length);
2134 if (skb_shinfo(rx->skb_head)->frag_list)
2135 rx->skb_tail->next = skb;
2137 skb_shinfo(rx->skb_head)->frag_list = skb;
2139 rx->skb_head->len += skb->len;
2140 rx->skb_head->data_len += skb->len;
2141 rx->skb_head->truesize += skb->truesize;
2143 /* packet to assemble has already been dropped because one or
2144 * more of its buffers could not be allocated
2146 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2147 dev_kfree_skb_irq(skb);
2151 if (extension_index >= 0) {
2155 ts_sec = le32_to_cpu(desc_ext->data1);
2156 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2157 RX_DESC_DATA2_TS_NS_MASK_);
2159 skb_hwtstamps(rx->skb_head)->hwtstamp =
2160 ktime_set(ts_sec, ts_nsec);
2161 lan743x_rx_reuse_ring_element(rx, extension_index);
2162 rx->last_head = extension_index;
2163 netdev_dbg(netdev, "process extension");
2166 if (is_last && rx->skb_head)
2167 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2169 if (is_last && rx->skb_head) {
2170 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2171 rx->adapter->netdev);
2172 netdev_dbg(netdev, "sending %d byte frame to OS",
2174 napi_gro_receive(&rx->napi, rx->skb_head);
2175 rx->skb_head = NULL;
2179 /* push tail and head forward */
2180 rx->last_tail = rx->last_head;
2181 rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2182 result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2187 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2189 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2190 struct lan743x_adapter *adapter = rx->adapter;
2191 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2192 u32 rx_tail_flags = 0;
2195 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2196 /* clear int status bit before reading packet */
2197 lan743x_csr_write(adapter, DMAC_INT_STS,
2198 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2200 for (count = 0; count < weight; count++) {
2201 result = lan743x_rx_process_buffer(rx);
2202 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2205 rx->frame_count += count;
2206 if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2209 if (!napi_complete_done(napi, count))
2212 /* re-arm interrupts, must write to rx tail on some chip variants */
2213 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2214 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2215 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2216 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2218 lan743x_csr_write(adapter, INT_EN_SET,
2219 INT_BIT_DMA_RX_(rx->channel_number));
2223 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2224 rx_tail_flags | rx->last_tail);
2229 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2231 if (rx->buffer_info && rx->ring_cpu_ptr) {
2234 for (index = 0; index < rx->ring_size; index++)
2235 lan743x_rx_release_ring_element(rx, index);
2238 if (rx->head_cpu_ptr) {
2239 dma_free_coherent(&rx->adapter->pdev->dev,
2240 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2242 rx->head_cpu_ptr = NULL;
2243 rx->head_dma_ptr = 0;
2246 kfree(rx->buffer_info);
2247 rx->buffer_info = NULL;
2249 if (rx->ring_cpu_ptr) {
2250 dma_free_coherent(&rx->adapter->pdev->dev,
2251 rx->ring_allocation_size, rx->ring_cpu_ptr,
2253 rx->ring_allocation_size = 0;
2254 rx->ring_cpu_ptr = NULL;
2255 rx->ring_dma_ptr = 0;
2262 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2264 size_t ring_allocation_size = 0;
2265 dma_addr_t dma_ptr = 0;
2266 void *cpu_ptr = NULL;
2270 rx->ring_size = LAN743X_RX_RING_SIZE;
2271 if (rx->ring_size <= 1) {
2275 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2279 ring_allocation_size = ALIGN(rx->ring_size *
2280 sizeof(struct lan743x_rx_descriptor),
2283 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2284 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2289 rx->ring_allocation_size = ring_allocation_size;
2290 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2291 rx->ring_dma_ptr = dma_ptr;
2293 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2299 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2301 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2302 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2309 rx->head_cpu_ptr = cpu_ptr;
2310 rx->head_dma_ptr = dma_ptr;
2311 if (rx->head_dma_ptr & 0x3) {
2317 for (index = 0; index < rx->ring_size; index++) {
2318 ret = lan743x_rx_init_ring_element(rx, index);
2325 lan743x_rx_ring_cleanup(rx);
2329 static void lan743x_rx_close(struct lan743x_rx *rx)
2331 struct lan743x_adapter *adapter = rx->adapter;
2333 lan743x_csr_write(adapter, FCT_RX_CTL,
2334 FCT_RX_CTL_DIS_(rx->channel_number));
2335 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2336 FCT_RX_CTL_EN_(rx->channel_number),
2337 0, 1000, 20000, 100);
2339 lan743x_csr_write(adapter, DMAC_CMD,
2340 DMAC_CMD_STOP_R_(rx->channel_number));
2341 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2343 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2344 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2345 lan743x_csr_write(adapter, INT_EN_CLR,
2346 INT_BIT_DMA_RX_(rx->channel_number));
2347 napi_disable(&rx->napi);
2349 netif_napi_del(&rx->napi);
2351 lan743x_rx_ring_cleanup(rx);
2354 static int lan743x_rx_open(struct lan743x_rx *rx)
2356 struct lan743x_adapter *adapter = rx->adapter;
2360 rx->frame_count = 0;
2361 ret = lan743x_rx_ring_init(rx);
2365 netif_napi_add(adapter->netdev,
2366 &rx->napi, lan743x_rx_napi_poll,
2369 lan743x_csr_write(adapter, DMAC_CMD,
2370 DMAC_CMD_RX_SWR_(rx->channel_number));
2371 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2372 DMAC_CMD_RX_SWR_(rx->channel_number),
2373 0, 1000, 20000, 100);
2375 /* set ring base address */
2376 lan743x_csr_write(adapter,
2377 RX_BASE_ADDRH(rx->channel_number),
2378 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2379 lan743x_csr_write(adapter,
2380 RX_BASE_ADDRL(rx->channel_number),
2381 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2383 /* set rx write back address */
2384 lan743x_csr_write(adapter,
2385 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2386 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2387 lan743x_csr_write(adapter,
2388 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2389 DMA_ADDR_LOW32(rx->head_dma_ptr));
2390 data = RX_CFG_A_RX_HP_WB_EN_;
2391 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2392 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2393 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2394 RX_CFG_A_RX_PF_THRES_SET_(16) |
2395 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2399 lan743x_csr_write(adapter,
2400 RX_CFG_A(rx->channel_number), data);
2403 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2404 data &= ~RX_CFG_B_RX_PAD_MASK_;
2405 if (!RX_HEAD_PADDING)
2406 data |= RX_CFG_B_RX_PAD_0_;
2408 data |= RX_CFG_B_RX_PAD_2_;
2409 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2410 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2411 data |= RX_CFG_B_TS_ALL_RX_;
2412 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2413 data |= RX_CFG_B_RDMABL_512_;
2415 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2416 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2418 (rx->channel_number));
2422 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2423 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2424 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2425 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2426 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2427 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2428 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2429 data |= RX_CFG_C_RX_INT_EN_R2C_;
2430 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2432 rx->last_tail = ((u32)(rx->ring_size - 1));
2433 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2435 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2436 if (rx->last_head) {
2441 napi_enable(&rx->napi);
2443 lan743x_csr_write(adapter, INT_EN_SET,
2444 INT_BIT_DMA_RX_(rx->channel_number));
2445 lan743x_csr_write(adapter, DMAC_INT_STS,
2446 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2447 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2448 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2449 lan743x_csr_write(adapter, DMAC_CMD,
2450 DMAC_CMD_START_R_(rx->channel_number));
2452 /* initialize fifo */
2453 lan743x_csr_write(adapter, FCT_RX_CTL,
2454 FCT_RX_CTL_RESET_(rx->channel_number));
2455 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2456 FCT_RX_CTL_RESET_(rx->channel_number),
2457 0, 1000, 20000, 100);
2458 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2459 FCT_FLOW_CTL_REQ_EN_ |
2460 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2461 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2464 lan743x_csr_write(adapter, FCT_RX_CTL,
2465 FCT_RX_CTL_EN_(rx->channel_number));
2469 netif_napi_del(&rx->napi);
2470 lan743x_rx_ring_cleanup(rx);
2476 static int lan743x_netdev_close(struct net_device *netdev)
2478 struct lan743x_adapter *adapter = netdev_priv(netdev);
2481 lan743x_tx_close(&adapter->tx[0]);
2483 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2484 lan743x_rx_close(&adapter->rx[index]);
2486 lan743x_ptp_close(adapter);
2488 lan743x_phy_close(adapter);
2490 lan743x_mac_close(adapter);
2492 lan743x_intr_close(adapter);
2497 static int lan743x_netdev_open(struct net_device *netdev)
2499 struct lan743x_adapter *adapter = netdev_priv(netdev);
2503 ret = lan743x_intr_open(adapter);
2507 ret = lan743x_mac_open(adapter);
2511 ret = lan743x_phy_open(adapter);
2515 ret = lan743x_ptp_open(adapter);
2519 lan743x_rfe_open(adapter);
2521 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2522 ret = lan743x_rx_open(&adapter->rx[index]);
2527 ret = lan743x_tx_open(&adapter->tx[0]);
2534 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2535 if (adapter->rx[index].ring_cpu_ptr)
2536 lan743x_rx_close(&adapter->rx[index]);
2538 lan743x_ptp_close(adapter);
2541 lan743x_phy_close(adapter);
2544 lan743x_mac_close(adapter);
2547 lan743x_intr_close(adapter);
2550 netif_warn(adapter, ifup, adapter->netdev,
2551 "Error opening LAN743x\n");
2555 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2556 struct net_device *netdev)
2558 struct lan743x_adapter *adapter = netdev_priv(netdev);
2560 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2563 static int lan743x_netdev_ioctl(struct net_device *netdev,
2564 struct ifreq *ifr, int cmd)
2566 if (!netif_running(netdev))
2568 if (cmd == SIOCSHWTSTAMP)
2569 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2570 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2573 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2575 struct lan743x_adapter *adapter = netdev_priv(netdev);
2577 lan743x_rfe_set_multicast(adapter);
2580 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2582 struct lan743x_adapter *adapter = netdev_priv(netdev);
2585 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2587 netdev->mtu = new_mtu;
2591 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2592 struct rtnl_link_stats64 *stats)
2594 struct lan743x_adapter *adapter = netdev_priv(netdev);
2596 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2597 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2598 stats->rx_bytes = lan743x_csr_read(adapter,
2599 STAT_RX_UNICAST_BYTE_COUNT) +
2600 lan743x_csr_read(adapter,
2601 STAT_RX_BROADCAST_BYTE_COUNT) +
2602 lan743x_csr_read(adapter,
2603 STAT_RX_MULTICAST_BYTE_COUNT);
2604 stats->tx_bytes = lan743x_csr_read(adapter,
2605 STAT_TX_UNICAST_BYTE_COUNT) +
2606 lan743x_csr_read(adapter,
2607 STAT_TX_BROADCAST_BYTE_COUNT) +
2608 lan743x_csr_read(adapter,
2609 STAT_TX_MULTICAST_BYTE_COUNT);
2610 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2611 lan743x_csr_read(adapter,
2612 STAT_RX_ALIGNMENT_ERRORS) +
2613 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2614 lan743x_csr_read(adapter,
2615 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2616 lan743x_csr_read(adapter,
2617 STAT_RX_OVERSIZE_FRAME_ERRORS);
2618 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2619 lan743x_csr_read(adapter,
2620 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2621 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2622 stats->rx_dropped = lan743x_csr_read(adapter,
2623 STAT_RX_DROPPED_FRAMES);
2624 stats->tx_dropped = lan743x_csr_read(adapter,
2625 STAT_TX_EXCESSIVE_COLLISION);
2626 stats->multicast = lan743x_csr_read(adapter,
2627 STAT_RX_MULTICAST_FRAMES) +
2628 lan743x_csr_read(adapter,
2629 STAT_TX_MULTICAST_FRAMES);
2630 stats->collisions = lan743x_csr_read(adapter,
2631 STAT_TX_SINGLE_COLLISIONS) +
2632 lan743x_csr_read(adapter,
2633 STAT_TX_MULTIPLE_COLLISIONS) +
2634 lan743x_csr_read(adapter,
2635 STAT_TX_LATE_COLLISIONS);
2638 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2641 struct lan743x_adapter *adapter = netdev_priv(netdev);
2642 struct sockaddr *sock_addr = addr;
2645 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2648 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2649 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2650 lan743x_rfe_update_mac_address(adapter);
2654 static const struct net_device_ops lan743x_netdev_ops = {
2655 .ndo_open = lan743x_netdev_open,
2656 .ndo_stop = lan743x_netdev_close,
2657 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2658 .ndo_do_ioctl = lan743x_netdev_ioctl,
2659 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2660 .ndo_change_mtu = lan743x_netdev_change_mtu,
2661 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2662 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2665 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2667 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2670 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2672 mdiobus_unregister(adapter->mdiobus);
2675 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2677 unregister_netdev(adapter->netdev);
2679 lan743x_mdiobus_cleanup(adapter);
2680 lan743x_hardware_cleanup(adapter);
2681 lan743x_pci_cleanup(adapter);
2684 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2685 struct pci_dev *pdev)
2687 struct lan743x_tx *tx;
2691 adapter->intr.irq = adapter->pdev->irq;
2692 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2694 ret = lan743x_gpio_init(adapter);
2698 ret = lan743x_mac_init(adapter);
2702 ret = lan743x_phy_init(adapter);
2706 ret = lan743x_ptp_init(adapter);
2710 lan743x_rfe_update_mac_address(adapter);
2712 ret = lan743x_dmac_init(adapter);
2716 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2717 adapter->rx[index].adapter = adapter;
2718 adapter->rx[index].channel_number = index;
2721 tx = &adapter->tx[0];
2722 tx->adapter = adapter;
2723 tx->channel_number = 0;
2724 spin_lock_init(&tx->ring_lock);
2728 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2732 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2733 if (!(adapter->mdiobus)) {
2738 adapter->mdiobus->priv = (void *)adapter;
2739 adapter->mdiobus->read = lan743x_mdiobus_read;
2740 adapter->mdiobus->write = lan743x_mdiobus_write;
2741 adapter->mdiobus->name = "lan743x-mdiobus";
2742 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2743 "pci-%s", pci_name(adapter->pdev));
2745 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2746 /* LAN7430 uses internal phy at address 1 */
2747 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2749 /* register mdiobus */
2750 ret = mdiobus_register(adapter->mdiobus);
2759 /* lan743x_pcidev_probe - Device Initialization Routine
2760 * @pdev: PCI device information struct
2761 * @id: entry in lan743x_pci_tbl
2763 * Returns 0 on success, negative on failure
2765 * initializes an adapter identified by a pci_dev structure.
2766 * The OS initialization, configuring of the adapter private structure,
2767 * and a hardware reset occur.
2769 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2770 const struct pci_device_id *id)
2772 struct lan743x_adapter *adapter = NULL;
2773 struct net_device *netdev = NULL;
2776 netdev = devm_alloc_etherdev(&pdev->dev,
2777 sizeof(struct lan743x_adapter));
2781 SET_NETDEV_DEV(netdev, &pdev->dev);
2782 pci_set_drvdata(pdev, netdev);
2783 adapter = netdev_priv(netdev);
2784 adapter->netdev = netdev;
2785 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2786 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2787 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2788 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2790 of_get_mac_address(pdev->dev.of_node, adapter->mac_address);
2792 ret = lan743x_pci_init(adapter, pdev);
2796 ret = lan743x_csr_init(adapter);
2800 ret = lan743x_hardware_init(adapter, pdev);
2804 ret = lan743x_mdiobus_init(adapter);
2806 goto cleanup_hardware;
2808 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2809 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2810 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2811 adapter->netdev->hw_features = adapter->netdev->features;
2813 /* carrier off reporting is important to ethtool even BEFORE open */
2814 netif_carrier_off(netdev);
2816 ret = register_netdev(adapter->netdev);
2818 goto cleanup_mdiobus;
2822 lan743x_mdiobus_cleanup(adapter);
2825 lan743x_hardware_cleanup(adapter);
2828 lan743x_pci_cleanup(adapter);
2831 pr_warn("Initialization failed\n");
2836 * lan743x_pcidev_remove - Device Removal Routine
2837 * @pdev: PCI device information struct
2839 * this is called by the PCI subsystem to alert the driver
2840 * that it should release a PCI device. This could be caused by a
2841 * Hot-Plug event, or because the driver is going to be removed from
2844 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2846 struct net_device *netdev = pci_get_drvdata(pdev);
2847 struct lan743x_adapter *adapter = netdev_priv(netdev);
2849 lan743x_full_cleanup(adapter);
2852 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2854 struct net_device *netdev = pci_get_drvdata(pdev);
2855 struct lan743x_adapter *adapter = netdev_priv(netdev);
2858 netif_device_detach(netdev);
2860 /* close netdev when netdev is at running state.
2861 * For instance, it is true when system goes to sleep by pm-suspend
2862 * However, it is false when system goes to sleep by suspend GUI menu
2864 if (netif_running(netdev))
2865 lan743x_netdev_close(netdev);
2869 pci_save_state(pdev);
2872 /* clean up lan743x portion */
2873 lan743x_hardware_cleanup(adapter);
2876 #ifdef CONFIG_PM_SLEEP
2877 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2879 return bitrev16(crc16(0xFFFF, buf, len));
2882 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2884 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2885 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2886 const u8 arp_type[2] = { 0x08, 0x06 };
2893 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2894 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2896 /* clear wake settings */
2897 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2898 pmtctl |= PMT_CTL_WUPS_MASK_;
2899 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2900 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2901 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2903 macrx = lan743x_csr_read(adapter, MAC_RX);
2908 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2910 if (adapter->wolopts & WAKE_PHY) {
2911 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2912 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2914 if (adapter->wolopts & WAKE_MAGIC) {
2915 wucsr |= MAC_WUCSR_MPEN_;
2916 macrx |= MAC_RX_RXEN_;
2917 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2919 if (adapter->wolopts & WAKE_UCAST) {
2920 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2921 macrx |= MAC_RX_RXEN_;
2922 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2923 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2925 if (adapter->wolopts & WAKE_BCAST) {
2926 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2927 macrx |= MAC_RX_RXEN_;
2928 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2929 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2931 if (adapter->wolopts & WAKE_MCAST) {
2932 /* IPv4 multicast */
2933 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2934 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2935 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2936 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2937 (crc & MAC_WUF_CFG_CRC16_MASK_));
2938 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2939 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2940 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2941 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2944 /* IPv6 multicast */
2945 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2946 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2947 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2948 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2949 (crc & MAC_WUF_CFG_CRC16_MASK_));
2950 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2951 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2952 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2953 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2956 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2957 macrx |= MAC_RX_RXEN_;
2958 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2959 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2961 if (adapter->wolopts & WAKE_ARP) {
2962 /* set MAC_WUF_CFG & WUF_MASK
2963 * for packettype (offset 12,13) = ARP (0x0806)
2965 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2966 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2967 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2968 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2969 (crc & MAC_WUF_CFG_CRC16_MASK_));
2970 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2971 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2972 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2973 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2976 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2977 macrx |= MAC_RX_RXEN_;
2978 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2979 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2982 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2983 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2984 lan743x_csr_write(adapter, MAC_RX, macrx);
2987 static int lan743x_pm_suspend(struct device *dev)
2989 struct pci_dev *pdev = to_pci_dev(dev);
2990 struct net_device *netdev = pci_get_drvdata(pdev);
2991 struct lan743x_adapter *adapter = netdev_priv(netdev);
2993 lan743x_pcidev_shutdown(pdev);
2995 /* clear all wakes */
2996 lan743x_csr_write(adapter, MAC_WUCSR, 0);
2997 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2998 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3000 if (adapter->wolopts)
3001 lan743x_pm_set_wol(adapter);
3003 /* Host sets PME_En, put D3hot */
3004 return pci_prepare_to_sleep(pdev);
3007 static int lan743x_pm_resume(struct device *dev)
3009 struct pci_dev *pdev = to_pci_dev(dev);
3010 struct net_device *netdev = pci_get_drvdata(pdev);
3011 struct lan743x_adapter *adapter = netdev_priv(netdev);
3014 pci_set_power_state(pdev, PCI_D0);
3015 pci_restore_state(pdev);
3016 pci_save_state(pdev);
3018 ret = lan743x_hardware_init(adapter, pdev);
3020 netif_err(adapter, probe, adapter->netdev,
3021 "lan743x_hardware_init returned %d\n", ret);
3024 /* open netdev when netdev is at running state while resume.
3025 * For instance, it is true when system wakesup after pm-suspend
3026 * However, it is false when system wakes up after suspend GUI menu
3028 if (netif_running(netdev))
3029 lan743x_netdev_open(netdev);
3031 netif_device_attach(netdev);
3036 static const struct dev_pm_ops lan743x_pm_ops = {
3037 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3039 #endif /* CONFIG_PM_SLEEP */
3041 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3042 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3043 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3047 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3049 static struct pci_driver lan743x_pcidev_driver = {
3050 .name = DRIVER_NAME,
3051 .id_table = lan743x_pcidev_tbl,
3052 .probe = lan743x_pcidev_probe,
3053 .remove = lan743x_pcidev_remove,
3054 #ifdef CONFIG_PM_SLEEP
3055 .driver.pm = &lan743x_pm_ops,
3057 .shutdown = lan743x_pcidev_shutdown,
3060 module_pci_driver(lan743x_pcidev_driver);
3062 MODULE_AUTHOR(DRIVER_AUTHOR);
3063 MODULE_DESCRIPTION(DRIVER_DESC);
3064 MODULE_LICENSE("GPL");