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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
21static 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
29static 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
54disable_device:
55 pci_disable_device(adapter->pdev);
56
57return_error:
58 return ret;
59}
60
61u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
62{
63 return ioread32(&adapter->csr.csr_address[offset]);
64}
65
66void 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
74static 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
86static 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
98static 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;
139clean_up:
140 return result;
141}
142
143static void lan743x_intr_software_isr(void *context)
144{
145 struct lan743x_adapter *adapter = context;
146 struct lan743x_intr *intr = &adapter->intr;
147 u32 int_sts;
148
149 int_sts = lan743x_csr_read(adapter, INT_STS);
150 if (int_sts & INT_BIT_SW_GP_) {
151 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
152 intr->software_isr_flag = 1;
153 }
154}
155
156static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
157{
158 struct lan743x_tx *tx = context;
159 struct lan743x_adapter *adapter = tx->adapter;
160 bool enable_flag = true;
161 u32 int_en = 0;
162
163 int_en = lan743x_csr_read(adapter, INT_EN_SET);
164 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
165 lan743x_csr_write(adapter, INT_EN_CLR,
166 INT_BIT_DMA_TX_(tx->channel_number));
167 }
168
169 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
170 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
171 u32 dmac_int_sts;
172 u32 dmac_int_en;
173
174 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
175 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
176 else
177 dmac_int_sts = ioc_bit;
178 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
179 dmac_int_en = lan743x_csr_read(adapter,
180 DMAC_INT_EN_SET);
181 else
182 dmac_int_en = ioc_bit;
183
184 dmac_int_en &= ioc_bit;
185 dmac_int_sts &= dmac_int_en;
186 if (dmac_int_sts & ioc_bit) {
187 napi_schedule(&tx->napi);
188 enable_flag = false;/* poll func will enable later */
189 }
190 }
191
192 if (enable_flag)
193 /* enable isr */
194 lan743x_csr_write(adapter, INT_EN_SET,
195 INT_BIT_DMA_TX_(tx->channel_number));
196}
197
198static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
199{
200 struct lan743x_rx *rx = context;
201 struct lan743x_adapter *adapter = rx->adapter;
202 bool enable_flag = true;
203
204 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
205 lan743x_csr_write(adapter, INT_EN_CLR,
206 INT_BIT_DMA_RX_(rx->channel_number));
207 }
208
209 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
210 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
211 u32 dmac_int_sts;
212 u32 dmac_int_en;
213
214 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
215 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
216 else
217 dmac_int_sts = rx_frame_bit;
218 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
219 dmac_int_en = lan743x_csr_read(adapter,
220 DMAC_INT_EN_SET);
221 else
222 dmac_int_en = rx_frame_bit;
223
224 dmac_int_en &= rx_frame_bit;
225 dmac_int_sts &= dmac_int_en;
226 if (dmac_int_sts & rx_frame_bit) {
227 napi_schedule(&rx->napi);
228 enable_flag = false;/* poll funct will enable later */
229 }
230 }
231
232 if (enable_flag) {
233 /* enable isr */
234 lan743x_csr_write(adapter, INT_EN_SET,
235 INT_BIT_DMA_RX_(rx->channel_number));
236 }
237}
238
239static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
240{
241 struct lan743x_adapter *adapter = context;
242 unsigned int channel;
243
244 if (int_sts & INT_BIT_ALL_RX_) {
245 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
246 channel++) {
247 u32 int_bit = INT_BIT_DMA_RX_(channel);
248
249 if (int_sts & int_bit) {
250 lan743x_rx_isr(&adapter->rx[channel],
251 int_bit, flags);
252 int_sts &= ~int_bit;
253 }
254 }
255 }
256 if (int_sts & INT_BIT_ALL_TX_) {
257 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
258 channel++) {
259 u32 int_bit = INT_BIT_DMA_TX_(channel);
260
261 if (int_sts & int_bit) {
262 lan743x_tx_isr(&adapter->tx[channel],
263 int_bit, flags);
264 int_sts &= ~int_bit;
265 }
266 }
267 }
268 if (int_sts & INT_BIT_ALL_OTHER_) {
269 if (int_sts & INT_BIT_SW_GP_) {
270 lan743x_intr_software_isr(adapter);
271 int_sts &= ~INT_BIT_SW_GP_;
272 }
273 if (int_sts & INT_BIT_1588_) {
274 lan743x_ptp_isr(adapter);
275 int_sts &= ~INT_BIT_1588_;
276 }
277 }
278 if (int_sts)
279 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
280}
281
282static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
283{
284 struct lan743x_vector *vector = ptr;
285 struct lan743x_adapter *adapter = vector->adapter;
286 irqreturn_t result = IRQ_NONE;
287 u32 int_enables;
288 u32 int_sts;
289
290 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
291 int_sts = lan743x_csr_read(adapter, INT_STS);
292 } else if (vector->flags &
293 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
294 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
295 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
296 } else {
297 /* use mask as implied status */
298 int_sts = vector->int_mask | INT_BIT_MAS_;
299 }
300
301 if (!(int_sts & INT_BIT_MAS_))
302 goto irq_done;
303
304 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
305 /* disable vector interrupt */
306 lan743x_csr_write(adapter,
307 INT_VEC_EN_CLR,
308 INT_VEC_EN_(vector->vector_index));
309
310 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
311 /* disable master interrupt */
312 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
313
314 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
315 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
316 } else {
317 /* use vector mask as implied enable mask */
318 int_enables = vector->int_mask;
319 }
320
321 int_sts &= int_enables;
322 int_sts &= vector->int_mask;
323 if (int_sts) {
324 if (vector->handler) {
325 vector->handler(vector->context,
326 int_sts, vector->flags);
327 } else {
328 /* disable interrupts on this vector */
329 lan743x_csr_write(adapter, INT_EN_CLR,
330 vector->int_mask);
331 }
332 result = IRQ_HANDLED;
333 }
334
335 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
336 /* enable master interrupt */
337 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
338
339 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
340 /* enable vector interrupt */
341 lan743x_csr_write(adapter,
342 INT_VEC_EN_SET,
343 INT_VEC_EN_(vector->vector_index));
344irq_done:
345 return result;
346}
347
348static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
349{
350 struct lan743x_intr *intr = &adapter->intr;
351 int result = -ENODEV;
352 int timeout = 10;
353
354 intr->software_isr_flag = 0;
355
356 /* enable interrupt */
357 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
358
359 /* activate interrupt here */
360 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
361 while ((timeout > 0) && (!(intr->software_isr_flag))) {
362 usleep_range(1000, 20000);
363 timeout--;
364 }
365
366 if (intr->software_isr_flag)
367 result = 0;
368
369 /* disable interrupts */
370 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
371 return result;
372}
373
374static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
375 int vector_index, u32 flags,
376 u32 int_mask,
377 lan743x_vector_handler handler,
378 void *context)
379{
380 struct lan743x_vector *vector = &adapter->intr.vector_list
381 [vector_index];
382 int ret;
383
384 vector->adapter = adapter;
385 vector->flags = flags;
386 vector->vector_index = vector_index;
387 vector->int_mask = int_mask;
388 vector->handler = handler;
389 vector->context = context;
390
391 ret = request_irq(vector->irq,
392 lan743x_intr_entry_isr,
393 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
394 IRQF_SHARED : 0, DRIVER_NAME, vector);
395 if (ret) {
396 vector->handler = NULL;
397 vector->context = NULL;
398 vector->int_mask = 0;
399 vector->flags = 0;
400 }
401 return ret;
402}
403
404static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
405 int vector_index)
406{
407 struct lan743x_vector *vector = &adapter->intr.vector_list
408 [vector_index];
409
410 free_irq(vector->irq, vector);
411 vector->handler = NULL;
412 vector->context = NULL;
413 vector->int_mask = 0;
414 vector->flags = 0;
415}
416
417static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
418 u32 int_mask)
419{
420 int index;
421
422 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
423 if (adapter->intr.vector_list[index].int_mask & int_mask)
424 return adapter->intr.vector_list[index].flags;
425 }
426 return 0;
427}
428
429static void lan743x_intr_close(struct lan743x_adapter *adapter)
430{
431 struct lan743x_intr *intr = &adapter->intr;
432 int index = 0;
433
434 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
435 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
436
437 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
438 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
439 lan743x_intr_unregister_isr(adapter, index);
440 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
441 }
442 }
443
444 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
445 pci_disable_msi(adapter->pdev);
446 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
447 }
448
449 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
450 pci_disable_msix(adapter->pdev);
451 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
452 }
453}
454
455static int lan743x_intr_open(struct lan743x_adapter *adapter)
456{
457 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
458 struct lan743x_intr *intr = &adapter->intr;
459 u32 int_vec_en_auto_clr = 0;
460 u32 int_vec_map0 = 0;
461 u32 int_vec_map1 = 0;
462 int ret = -ENODEV;
463 int index = 0;
464 u32 flags = 0;
465
466 intr->number_of_vectors = 0;
467
468 /* Try to set up MSIX interrupts */
469 memset(&msix_entries[0], 0,
470 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
471 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
472 msix_entries[index].entry = index;
473 ret = pci_enable_msix_range(adapter->pdev,
474 msix_entries, 1,
475 1 + LAN743X_USED_TX_CHANNELS +
476 LAN743X_USED_RX_CHANNELS);
477
478 if (ret > 0) {
479 intr->flags |= INTR_FLAG_MSIX_ENABLED;
480 intr->number_of_vectors = ret;
481 intr->using_vectors = true;
482 for (index = 0; index < intr->number_of_vectors; index++)
483 intr->vector_list[index].irq = msix_entries
484 [index].vector;
485 netif_info(adapter, ifup, adapter->netdev,
486 "using MSIX interrupts, number of vectors = %d\n",
487 intr->number_of_vectors);
488 }
489
490 /* If MSIX failed try to setup using MSI interrupts */
491 if (!intr->number_of_vectors) {
492 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
493 if (!pci_enable_msi(adapter->pdev)) {
494 intr->flags |= INTR_FLAG_MSI_ENABLED;
495 intr->number_of_vectors = 1;
496 intr->using_vectors = true;
497 intr->vector_list[0].irq =
498 adapter->pdev->irq;
499 netif_info(adapter, ifup, adapter->netdev,
500 "using MSI interrupts, number of vectors = %d\n",
501 intr->number_of_vectors);
502 }
503 }
504 }
505
506 /* If MSIX, and MSI failed, setup using legacy interrupt */
507 if (!intr->number_of_vectors) {
508 intr->number_of_vectors = 1;
509 intr->using_vectors = false;
510 intr->vector_list[0].irq = intr->irq;
511 netif_info(adapter, ifup, adapter->netdev,
512 "using legacy interrupts\n");
513 }
514
515 /* At this point we must have at least one irq */
516 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
517
518 /* map all interrupts to vector 0 */
519 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
520 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
521 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
522 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
523 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
524 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
525 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
526
527 if (intr->using_vectors) {
528 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
529 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
530 } else {
531 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
532 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
533 LAN743X_VECTOR_FLAG_IRQ_SHARED;
534 }
535
536 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
537 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
538 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
539 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
540 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
541 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
542 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
543 }
544
545 ret = lan743x_intr_register_isr(adapter, 0, flags,
546 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
547 INT_BIT_ALL_OTHER_,
548 lan743x_intr_shared_isr, adapter);
549 if (ret)
550 goto clean_up;
551 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
552
553 if (intr->using_vectors)
554 lan743x_csr_write(adapter, INT_VEC_EN_SET,
555 INT_VEC_EN_(0));
556
557 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
558 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
559 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
560 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
561 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
562 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
563 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
564 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
565 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
566 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
567 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
568 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
569 }
570
571 /* enable interrupts */
572 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
573 ret = lan743x_intr_test_isr(adapter);
574 if (ret)
575 goto clean_up;
576
577 if (intr->number_of_vectors > 1) {
578 int number_of_tx_vectors = intr->number_of_vectors - 1;
579
580 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
581 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
582 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
583 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
584 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
585 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
586 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
587 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
588
589 if (adapter->csr.flags &
590 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
591 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
592 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
593 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
594 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
595 }
596
597 for (index = 0; index < number_of_tx_vectors; index++) {
598 u32 int_bit = INT_BIT_DMA_TX_(index);
599 int vector = index + 1;
600
601 /* map TX interrupt to vector */
602 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
603 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
604
605 /* Remove TX interrupt from shared mask */
606 intr->vector_list[0].int_mask &= ~int_bit;
607 ret = lan743x_intr_register_isr(adapter, vector, flags,
608 int_bit, lan743x_tx_isr,
609 &adapter->tx[index]);
610 if (ret)
611 goto clean_up;
612 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
613 if (!(flags &
614 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
615 lan743x_csr_write(adapter, INT_VEC_EN_SET,
616 INT_VEC_EN_(vector));
617 }
618 }
619 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
620 int number_of_rx_vectors = intr->number_of_vectors -
621 LAN743X_USED_TX_CHANNELS - 1;
622
623 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
624 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
625
626 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
627 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
628 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
629 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
630 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
631 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
632
633 if (adapter->csr.flags &
634 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
635 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
636 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
637 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
638 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
639 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
640 }
641 for (index = 0; index < number_of_rx_vectors; index++) {
642 int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
643 u32 int_bit = INT_BIT_DMA_RX_(index);
644
645 /* map RX interrupt to vector */
646 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
647 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
648 if (flags &
649 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
650 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
651 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
652 int_vec_en_auto_clr);
653 }
654
655 /* Remove RX interrupt from shared mask */
656 intr->vector_list[0].int_mask &= ~int_bit;
657 ret = lan743x_intr_register_isr(adapter, vector, flags,
658 int_bit, lan743x_rx_isr,
659 &adapter->rx[index]);
660 if (ret)
661 goto clean_up;
662 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
663
664 lan743x_csr_write(adapter, INT_VEC_EN_SET,
665 INT_VEC_EN_(vector));
666 }
667 }
668 return 0;
669
670clean_up:
671 lan743x_intr_close(adapter);
672 return ret;
673}
674
675static int lan743x_dp_write(struct lan743x_adapter *adapter,
676 u32 select, u32 addr, u32 length, u32 *buf)
677{
678 int ret = -EIO;
679 u32 dp_sel;
680 int i;
681
682 mutex_lock(&adapter->dp_lock);
683 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
684 1, 40, 100, 100))
685 goto unlock;
686 dp_sel = lan743x_csr_read(adapter, DP_SEL);
687 dp_sel &= ~DP_SEL_MASK_;
688 dp_sel |= select;
689 lan743x_csr_write(adapter, DP_SEL, dp_sel);
690
691 for (i = 0; i < length; i++) {
692 lan743x_csr_write(adapter, DP_ADDR, addr + i);
693 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
694 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
695 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
696 1, 40, 100, 100))
697 goto unlock;
698 }
699 ret = 0;
700
701unlock:
702 mutex_unlock(&adapter->dp_lock);
703 return ret;
704}
705
706static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
707{
708 u32 ret;
709
710 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
711 MAC_MII_ACC_PHY_ADDR_MASK_;
712 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
713 MAC_MII_ACC_MIIRINDA_MASK_;
714
715 if (read)
716 ret |= MAC_MII_ACC_MII_READ_;
717 else
718 ret |= MAC_MII_ACC_MII_WRITE_;
719 ret |= MAC_MII_ACC_MII_BUSY_;
720
721 return ret;
722}
723
724static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
725{
726 u32 data;
727
728 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
729 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
730}
731
732static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
733{
734 struct lan743x_adapter *adapter = bus->priv;
735 u32 val, mii_access;
736 int ret;
737
738 /* comfirm MII not busy */
739 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
740 if (ret < 0)
741 return ret;
742
743 /* set the address, index & direction (read from PHY) */
744 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
745 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
746 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
747 if (ret < 0)
748 return ret;
749
750 val = lan743x_csr_read(adapter, MAC_MII_DATA);
751 return (int)(val & 0xFFFF);
752}
753
754static int lan743x_mdiobus_write(struct mii_bus *bus,
755 int phy_id, int index, u16 regval)
756{
757 struct lan743x_adapter *adapter = bus->priv;
758 u32 val, mii_access;
759 int ret;
760
761 /* confirm MII not busy */
762 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
763 if (ret < 0)
764 return ret;
765 val = (u32)regval;
766 lan743x_csr_write(adapter, MAC_MII_DATA, val);
767
768 /* set the address, index & direction (write to PHY) */
769 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
770 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
771 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
772 return ret;
773}
774
775static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
776 u8 *addr)
777{
778 u32 addr_lo, addr_hi;
779
780 addr_lo = addr[0] |
781 addr[1] << 8 |
782 addr[2] << 16 |
783 addr[3] << 24;
784 addr_hi = addr[4] |
785 addr[5] << 8;
786 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
787 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
788
789 ether_addr_copy(adapter->mac_address, addr);
790 netif_info(adapter, drv, adapter->netdev,
791 "MAC address set to %pM\n", addr);
792}
793
794static int lan743x_mac_init(struct lan743x_adapter *adapter)
795{
796 bool mac_address_valid = true;
797 struct net_device *netdev;
798 u32 mac_addr_hi = 0;
799 u32 mac_addr_lo = 0;
800 u32 data;
801
802 netdev = adapter->netdev;
803
804 /* disable auto duplex, and speed detection. Phylib does that */
805 data = lan743x_csr_read(adapter, MAC_CR);
806 data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
807 data |= MAC_CR_CNTR_RST_;
808 lan743x_csr_write(adapter, MAC_CR, data);
809
810 if (!is_valid_ether_addr(adapter->mac_address)) {
811 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
812 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
813 adapter->mac_address[0] = mac_addr_lo & 0xFF;
814 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
815 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
816 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
817 adapter->mac_address[4] = mac_addr_hi & 0xFF;
818 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
819
820 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
821 mac_addr_lo == 0xFFFFFFFF) {
822 mac_address_valid = false;
823 } else if (!is_valid_ether_addr(adapter->mac_address)) {
824 mac_address_valid = false;
825 }
826
827 if (!mac_address_valid)
828 eth_random_addr(adapter->mac_address);
829 }
830 lan743x_mac_set_address(adapter, adapter->mac_address);
831 ether_addr_copy(netdev->dev_addr, adapter->mac_address);
832
833 return 0;
834}
835
836static int lan743x_mac_open(struct lan743x_adapter *adapter)
837{
838 int ret = 0;
839 u32 temp;
840
841 temp = lan743x_csr_read(adapter, MAC_RX);
842 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
843 temp = lan743x_csr_read(adapter, MAC_TX);
844 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
845 return ret;
846}
847
848static void lan743x_mac_close(struct lan743x_adapter *adapter)
849{
850 u32 temp;
851
852 temp = lan743x_csr_read(adapter, MAC_TX);
853 temp &= ~MAC_TX_TXEN_;
854 lan743x_csr_write(adapter, MAC_TX, temp);
855 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
856 1, 1000, 20000, 100);
857
858 temp = lan743x_csr_read(adapter, MAC_RX);
859 temp &= ~MAC_RX_RXEN_;
860 lan743x_csr_write(adapter, MAC_RX, temp);
861 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
862 1, 1000, 20000, 100);
863}
864
865static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
866 bool tx_enable, bool rx_enable)
867{
868 u32 flow_setting = 0;
869
870 /* set maximum pause time because when fifo space frees
871 * up a zero value pause frame will be sent to release the pause
872 */
873 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
874 if (tx_enable)
875 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
876 if (rx_enable)
877 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
878 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
879}
880
881static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
882{
883 int enabled = 0;
884 u32 mac_rx = 0;
885
886 mac_rx = lan743x_csr_read(adapter, MAC_RX);
887 if (mac_rx & MAC_RX_RXEN_) {
888 enabled = 1;
889 if (mac_rx & MAC_RX_RXD_) {
890 lan743x_csr_write(adapter, MAC_RX, mac_rx);
891 mac_rx &= ~MAC_RX_RXD_;
892 }
893 mac_rx &= ~MAC_RX_RXEN_;
894 lan743x_csr_write(adapter, MAC_RX, mac_rx);
895 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
896 1, 1000, 20000, 100);
897 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
898 }
899
900 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
901 mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
902 MAC_RX_MAX_SIZE_MASK_);
903 lan743x_csr_write(adapter, MAC_RX, mac_rx);
904
905 if (enabled) {
906 mac_rx |= MAC_RX_RXEN_;
907 lan743x_csr_write(adapter, MAC_RX, mac_rx);
908 }
909 return 0;
910}
911
912/* PHY */
913static int lan743x_phy_reset(struct lan743x_adapter *adapter)
914{
915 u32 data;
916
917 /* Only called with in probe, and before mdiobus_register */
918
919 data = lan743x_csr_read(adapter, PMT_CTL);
920 data |= PMT_CTL_ETH_PHY_RST_;
921 lan743x_csr_write(adapter, PMT_CTL, data);
922
923 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
924 (!(data & PMT_CTL_ETH_PHY_RST_) &&
925 (data & PMT_CTL_READY_)),
926 50000, 1000000);
927}
928
929static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
930 u8 duplex, u16 local_adv,
931 u16 remote_adv)
932{
933 struct lan743x_phy *phy = &adapter->phy;
934 u8 cap;
935
936 if (phy->fc_autoneg)
937 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
938 else
939 cap = phy->fc_request_control;
940
941 lan743x_mac_flow_ctrl_set_enables(adapter,
942 cap & FLOW_CTRL_TX,
943 cap & FLOW_CTRL_RX);
944}
945
946static int lan743x_phy_init(struct lan743x_adapter *adapter)
947{
948 return lan743x_phy_reset(adapter);
949}
950
951static void lan743x_phy_link_status_change(struct net_device *netdev)
952{
953 struct lan743x_adapter *adapter = netdev_priv(netdev);
954 struct phy_device *phydev = netdev->phydev;
955 u32 data;
956
957 phy_print_status(phydev);
958 if (phydev->state == PHY_RUNNING) {
959 struct ethtool_link_ksettings ksettings;
960 int remote_advertisement = 0;
961 int local_advertisement = 0;
962
963 data = lan743x_csr_read(adapter, MAC_CR);
964
965 /* set interface mode */
966 if (phy_interface_mode_is_rgmii(adapter->phy_mode))
967 /* RGMII */
968 data &= ~MAC_CR_MII_EN_;
969 else
970 /* GMII */
971 data |= MAC_CR_MII_EN_;
972
973 /* set duplex mode */
974 if (phydev->duplex)
975 data |= MAC_CR_DPX_;
976 else
977 data &= ~MAC_CR_DPX_;
978
979 /* set bus speed */
980 switch (phydev->speed) {
981 case SPEED_10:
982 data &= ~MAC_CR_CFG_H_;
983 data &= ~MAC_CR_CFG_L_;
984 break;
985 case SPEED_100:
986 data &= ~MAC_CR_CFG_H_;
987 data |= MAC_CR_CFG_L_;
988 break;
989 case SPEED_1000:
990 data |= MAC_CR_CFG_H_;
991 data &= ~MAC_CR_CFG_L_;
992 break;
993 }
994 lan743x_csr_write(adapter, MAC_CR, data);
995
996 memset(&ksettings, 0, sizeof(ksettings));
997 phy_ethtool_get_link_ksettings(netdev, &ksettings);
998 local_advertisement =
999 linkmode_adv_to_mii_adv_t(phydev->advertising);
1000 remote_advertisement =
1001 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
1002
1003 lan743x_phy_update_flowcontrol(adapter,
1004 ksettings.base.duplex,
1005 local_advertisement,
1006 remote_advertisement);
1007 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
1008 }
1009}
1010
1011static void lan743x_phy_close(struct lan743x_adapter *adapter)
1012{
1013 struct net_device *netdev = adapter->netdev;
1014
1015 phy_stop(netdev->phydev);
1016 phy_disconnect(netdev->phydev);
1017 netdev->phydev = NULL;
1018}
1019
1020static int lan743x_phy_open(struct lan743x_adapter *adapter)
1021{
1022 struct lan743x_phy *phy = &adapter->phy;
1023 struct device_node *phynode;
1024 struct phy_device *phydev;
1025 struct net_device *netdev;
1026 int ret = -EIO;
1027
1028 netdev = adapter->netdev;
1029 phynode = of_node_get(adapter->pdev->dev.of_node);
1030 adapter->phy_mode = PHY_INTERFACE_MODE_GMII;
1031
1032 if (phynode) {
1033 of_get_phy_mode(phynode, &adapter->phy_mode);
1034
1035 if (of_phy_is_fixed_link(phynode)) {
1036 ret = of_phy_register_fixed_link(phynode);
1037 if (ret) {
1038 netdev_err(netdev,
1039 "cannot register fixed PHY\n");
1040 of_node_put(phynode);
1041 goto return_error;
1042 }
1043 }
1044 phydev = of_phy_connect(netdev, phynode,
1045 lan743x_phy_link_status_change, 0,
1046 adapter->phy_mode);
1047 of_node_put(phynode);
1048 if (!phydev)
1049 goto return_error;
1050 } else {
1051 phydev = phy_find_first(adapter->mdiobus);
1052 if (!phydev)
1053 goto return_error;
1054
1055 ret = phy_connect_direct(netdev, phydev,
1056 lan743x_phy_link_status_change,
1057 adapter->phy_mode);
1058 if (ret)
1059 goto return_error;
1060 }
1061
1062 /* MAC doesn't support 1000T Half */
1063 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1064
1065 /* support both flow controls */
1066 phy_support_asym_pause(phydev);
1067 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1068 phy->fc_autoneg = phydev->autoneg;
1069
1070 phy_start(phydev);
1071 phy_start_aneg(phydev);
1072 return 0;
1073
1074return_error:
1075 return ret;
1076}
1077
1078static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1079{
1080 lan743x_csr_write(adapter, RFE_RSS_CFG,
1081 RFE_RSS_CFG_UDP_IPV6_EX_ |
1082 RFE_RSS_CFG_TCP_IPV6_EX_ |
1083 RFE_RSS_CFG_IPV6_EX_ |
1084 RFE_RSS_CFG_UDP_IPV6_ |
1085 RFE_RSS_CFG_TCP_IPV6_ |
1086 RFE_RSS_CFG_IPV6_ |
1087 RFE_RSS_CFG_UDP_IPV4_ |
1088 RFE_RSS_CFG_TCP_IPV4_ |
1089 RFE_RSS_CFG_IPV4_ |
1090 RFE_RSS_CFG_VALID_HASH_BITS_ |
1091 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1092 RFE_RSS_CFG_RSS_HASH_STORE_ |
1093 RFE_RSS_CFG_RSS_ENABLE_);
1094}
1095
1096static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1097{
1098 u8 *mac_addr;
1099 u32 mac_addr_hi = 0;
1100 u32 mac_addr_lo = 0;
1101
1102 /* Add mac address to perfect Filter */
1103 mac_addr = adapter->mac_address;
1104 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1105 (((u32)(mac_addr[1])) << 8) |
1106 (((u32)(mac_addr[2])) << 16) |
1107 (((u32)(mac_addr[3])) << 24));
1108 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1109 (((u32)(mac_addr[5])) << 8));
1110
1111 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1112 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1113 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1114}
1115
1116static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1117{
1118 struct net_device *netdev = adapter->netdev;
1119 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1120 u32 rfctl;
1121 u32 data;
1122
1123 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1124 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1125 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1126 rfctl |= RFE_CTL_AB_;
1127 if (netdev->flags & IFF_PROMISC) {
1128 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1129 } else {
1130 if (netdev->flags & IFF_ALLMULTI)
1131 rfctl |= RFE_CTL_AM_;
1132 }
1133
1134 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1135 if (netdev_mc_count(netdev)) {
1136 struct netdev_hw_addr *ha;
1137 int i;
1138
1139 rfctl |= RFE_CTL_DA_PERFECT_;
1140 i = 1;
1141 netdev_for_each_mc_addr(ha, netdev) {
1142 /* set first 32 into Perfect Filter */
1143 if (i < 33) {
1144 lan743x_csr_write(adapter,
1145 RFE_ADDR_FILT_HI(i), 0);
1146 data = ha->addr[3];
1147 data = ha->addr[2] | (data << 8);
1148 data = ha->addr[1] | (data << 8);
1149 data = ha->addr[0] | (data << 8);
1150 lan743x_csr_write(adapter,
1151 RFE_ADDR_FILT_LO(i), data);
1152 data = ha->addr[5];
1153 data = ha->addr[4] | (data << 8);
1154 data |= RFE_ADDR_FILT_HI_VALID_;
1155 lan743x_csr_write(adapter,
1156 RFE_ADDR_FILT_HI(i), data);
1157 } else {
1158 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1159 23) & 0x1FF;
1160 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1161 rfctl |= RFE_CTL_MCAST_HASH_;
1162 }
1163 i++;
1164 }
1165 }
1166
1167 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1168 DP_SEL_VHF_VLAN_LEN,
1169 DP_SEL_VHF_HASH_LEN, hash_table);
1170 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1171}
1172
1173static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1174{
1175 u32 data = 0;
1176
1177 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1178 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1179 0, 1000, 20000, 100);
1180 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1181 case DMA_DESCRIPTOR_SPACING_16:
1182 data = DMAC_CFG_MAX_DSPACE_16_;
1183 break;
1184 case DMA_DESCRIPTOR_SPACING_32:
1185 data = DMAC_CFG_MAX_DSPACE_32_;
1186 break;
1187 case DMA_DESCRIPTOR_SPACING_64:
1188 data = DMAC_CFG_MAX_DSPACE_64_;
1189 break;
1190 case DMA_DESCRIPTOR_SPACING_128:
1191 data = DMAC_CFG_MAX_DSPACE_128_;
1192 break;
1193 default:
1194 return -EPERM;
1195 }
1196 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1197 data |= DMAC_CFG_COAL_EN_;
1198 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1199 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1200 lan743x_csr_write(adapter, DMAC_CFG, data);
1201 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1202 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1203 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1204 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1205 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1206 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1207 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1208 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1209 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1210 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1211 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1212 return 0;
1213}
1214
1215static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1216 int tx_channel)
1217{
1218 u32 dmac_cmd = 0;
1219
1220 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1221 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1222 DMAC_CMD_START_T_(tx_channel)),
1223 (dmac_cmd &
1224 DMAC_CMD_STOP_T_(tx_channel)));
1225}
1226
1227static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1228 int tx_channel)
1229{
1230 int timeout = 100;
1231 int result = 0;
1232
1233 while (timeout &&
1234 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1235 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1236 usleep_range(1000, 20000);
1237 timeout--;
1238 }
1239 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1240 result = -ENODEV;
1241 return result;
1242}
1243
1244static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1245 int rx_channel)
1246{
1247 u32 dmac_cmd = 0;
1248
1249 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1250 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1251 DMAC_CMD_START_R_(rx_channel)),
1252 (dmac_cmd &
1253 DMAC_CMD_STOP_R_(rx_channel)));
1254}
1255
1256static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1257 int rx_channel)
1258{
1259 int timeout = 100;
1260 int result = 0;
1261
1262 while (timeout &&
1263 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1264 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1265 usleep_range(1000, 20000);
1266 timeout--;
1267 }
1268 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1269 result = -ENODEV;
1270 return result;
1271}
1272
1273static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1274 int descriptor_index, bool cleanup)
1275{
1276 struct lan743x_tx_buffer_info *buffer_info = NULL;
1277 struct lan743x_tx_descriptor *descriptor = NULL;
1278 u32 descriptor_type = 0;
1279 bool ignore_sync;
1280
1281 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1282 buffer_info = &tx->buffer_info[descriptor_index];
1283 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1284 goto done;
1285
1286 descriptor_type = (descriptor->data0) &
1287 TX_DESC_DATA0_DTYPE_MASK_;
1288 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1289 goto clean_up_data_descriptor;
1290 else
1291 goto clear_active;
1292
1293clean_up_data_descriptor:
1294 if (buffer_info->dma_ptr) {
1295 if (buffer_info->flags &
1296 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1297 dma_unmap_page(&tx->adapter->pdev->dev,
1298 buffer_info->dma_ptr,
1299 buffer_info->buffer_length,
1300 DMA_TO_DEVICE);
1301 } else {
1302 dma_unmap_single(&tx->adapter->pdev->dev,
1303 buffer_info->dma_ptr,
1304 buffer_info->buffer_length,
1305 DMA_TO_DEVICE);
1306 }
1307 buffer_info->dma_ptr = 0;
1308 buffer_info->buffer_length = 0;
1309 }
1310 if (!buffer_info->skb)
1311 goto clear_active;
1312
1313 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1314 dev_kfree_skb(buffer_info->skb);
1315 goto clear_skb;
1316 }
1317
1318 if (cleanup) {
1319 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1320 dev_kfree_skb(buffer_info->skb);
1321 } else {
1322 ignore_sync = (buffer_info->flags &
1323 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1324 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1325 buffer_info->skb, ignore_sync);
1326 }
1327
1328clear_skb:
1329 buffer_info->skb = NULL;
1330
1331clear_active:
1332 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1333
1334done:
1335 memset(buffer_info, 0, sizeof(*buffer_info));
1336 memset(descriptor, 0, sizeof(*descriptor));
1337}
1338
1339static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1340{
1341 return ((++index) % tx->ring_size);
1342}
1343
1344static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1345{
1346 while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1347 lan743x_tx_release_desc(tx, tx->last_head, false);
1348 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1349 }
1350}
1351
1352static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1353{
1354 u32 original_head = 0;
1355
1356 original_head = tx->last_head;
1357 do {
1358 lan743x_tx_release_desc(tx, tx->last_head, true);
1359 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1360 } while (tx->last_head != original_head);
1361 memset(tx->ring_cpu_ptr, 0,
1362 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1363 memset(tx->buffer_info, 0,
1364 sizeof(*tx->buffer_info) * (tx->ring_size));
1365}
1366
1367static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1368 struct sk_buff *skb)
1369{
1370 int result = 1; /* 1 for the main skb buffer */
1371 int nr_frags = 0;
1372
1373 if (skb_is_gso(skb))
1374 result++; /* requires an extension descriptor */
1375 nr_frags = skb_shinfo(skb)->nr_frags;
1376 result += nr_frags; /* 1 for each fragment buffer */
1377 return result;
1378}
1379
1380static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1381{
1382 int last_head = tx->last_head;
1383 int last_tail = tx->last_tail;
1384
1385 if (last_tail >= last_head)
1386 return tx->ring_size - last_tail + last_head - 1;
1387 else
1388 return last_head - last_tail - 1;
1389}
1390
1391void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1392 bool enable_timestamping,
1393 bool enable_onestep_sync)
1394{
1395 if (enable_timestamping)
1396 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1397 else
1398 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1399 if (enable_onestep_sync)
1400 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1401 else
1402 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1403}
1404
1405static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1406 unsigned char *first_buffer,
1407 unsigned int first_buffer_length,
1408 unsigned int frame_length,
1409 bool time_stamp,
1410 bool check_sum)
1411{
1412 /* called only from within lan743x_tx_xmit_frame.
1413 * assuming tx->ring_lock has already been acquired.
1414 */
1415 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1416 struct lan743x_tx_buffer_info *buffer_info = NULL;
1417 struct lan743x_adapter *adapter = tx->adapter;
1418 struct device *dev = &adapter->pdev->dev;
1419 dma_addr_t dma_ptr;
1420
1421 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1422 tx->frame_first = tx->last_tail;
1423 tx->frame_tail = tx->frame_first;
1424
1425 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1426 buffer_info = &tx->buffer_info[tx->frame_tail];
1427 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1428 DMA_TO_DEVICE);
1429 if (dma_mapping_error(dev, dma_ptr))
1430 return -ENOMEM;
1431
1432 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1433 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1434 tx_descriptor->data3 = (frame_length << 16) &
1435 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1436
1437 buffer_info->skb = NULL;
1438 buffer_info->dma_ptr = dma_ptr;
1439 buffer_info->buffer_length = first_buffer_length;
1440 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1441
1442 tx->frame_data0 = (first_buffer_length &
1443 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1444 TX_DESC_DATA0_DTYPE_DATA_ |
1445 TX_DESC_DATA0_FS_ |
1446 TX_DESC_DATA0_FCS_;
1447 if (time_stamp)
1448 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1449
1450 if (check_sum)
1451 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1452 TX_DESC_DATA0_IPE_ |
1453 TX_DESC_DATA0_TPE_;
1454
1455 /* data0 will be programmed in one of other frame assembler functions */
1456 return 0;
1457}
1458
1459static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1460 unsigned int frame_length,
1461 int nr_frags)
1462{
1463 /* called only from within lan743x_tx_xmit_frame.
1464 * assuming tx->ring_lock has already been acquired.
1465 */
1466 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1467 struct lan743x_tx_buffer_info *buffer_info = NULL;
1468
1469 /* wrap up previous descriptor */
1470 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1471 if (nr_frags <= 0) {
1472 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1473 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1474 }
1475 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1476 tx_descriptor->data0 = tx->frame_data0;
1477
1478 /* move to next descriptor */
1479 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1480 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1481 buffer_info = &tx->buffer_info[tx->frame_tail];
1482
1483 /* add extension descriptor */
1484 tx_descriptor->data1 = 0;
1485 tx_descriptor->data2 = 0;
1486 tx_descriptor->data3 = 0;
1487
1488 buffer_info->skb = NULL;
1489 buffer_info->dma_ptr = 0;
1490 buffer_info->buffer_length = 0;
1491 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1492
1493 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1494 TX_DESC_DATA0_DTYPE_EXT_ |
1495 TX_DESC_DATA0_EXT_LSO_;
1496
1497 /* data0 will be programmed in one of other frame assembler functions */
1498}
1499
1500static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1501 const skb_frag_t *fragment,
1502 unsigned int frame_length)
1503{
1504 /* called only from within lan743x_tx_xmit_frame
1505 * assuming tx->ring_lock has already been acquired
1506 */
1507 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1508 struct lan743x_tx_buffer_info *buffer_info = NULL;
1509 struct lan743x_adapter *adapter = tx->adapter;
1510 struct device *dev = &adapter->pdev->dev;
1511 unsigned int fragment_length = 0;
1512 dma_addr_t dma_ptr;
1513
1514 fragment_length = skb_frag_size(fragment);
1515 if (!fragment_length)
1516 return 0;
1517
1518 /* wrap up previous descriptor */
1519 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1520 tx_descriptor->data0 = tx->frame_data0;
1521
1522 /* move to next descriptor */
1523 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1524 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1525 buffer_info = &tx->buffer_info[tx->frame_tail];
1526 dma_ptr = skb_frag_dma_map(dev, fragment,
1527 0, fragment_length,
1528 DMA_TO_DEVICE);
1529 if (dma_mapping_error(dev, dma_ptr)) {
1530 int desc_index;
1531
1532 /* cleanup all previously setup descriptors */
1533 desc_index = tx->frame_first;
1534 while (desc_index != tx->frame_tail) {
1535 lan743x_tx_release_desc(tx, desc_index, true);
1536 desc_index = lan743x_tx_next_index(tx, desc_index);
1537 }
1538 dma_wmb();
1539 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1540 tx->frame_first = 0;
1541 tx->frame_data0 = 0;
1542 tx->frame_tail = 0;
1543 return -ENOMEM;
1544 }
1545
1546 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1547 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1548 tx_descriptor->data3 = (frame_length << 16) &
1549 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1550
1551 buffer_info->skb = NULL;
1552 buffer_info->dma_ptr = dma_ptr;
1553 buffer_info->buffer_length = fragment_length;
1554 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1555 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1556
1557 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1558 TX_DESC_DATA0_DTYPE_DATA_ |
1559 TX_DESC_DATA0_FCS_;
1560
1561 /* data0 will be programmed in one of other frame assembler functions */
1562 return 0;
1563}
1564
1565static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1566 struct sk_buff *skb,
1567 bool time_stamp,
1568 bool ignore_sync)
1569{
1570 /* called only from within lan743x_tx_xmit_frame
1571 * assuming tx->ring_lock has already been acquired
1572 */
1573 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1574 struct lan743x_tx_buffer_info *buffer_info = NULL;
1575 struct lan743x_adapter *adapter = tx->adapter;
1576 u32 tx_tail_flags = 0;
1577
1578 /* wrap up previous descriptor */
1579 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1580 TX_DESC_DATA0_DTYPE_DATA_) {
1581 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1582 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1583 }
1584
1585 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1586 buffer_info = &tx->buffer_info[tx->frame_tail];
1587 buffer_info->skb = skb;
1588 if (time_stamp)
1589 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1590 if (ignore_sync)
1591 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1592
1593 tx_descriptor->data0 = tx->frame_data0;
1594 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1595 tx->last_tail = tx->frame_tail;
1596
1597 dma_wmb();
1598
1599 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1600 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1601 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1602 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1603 TX_TAIL_SET_TOP_INT_EN_;
1604
1605 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1606 tx_tail_flags | tx->frame_tail);
1607 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1608}
1609
1610static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1611 struct sk_buff *skb)
1612{
1613 int required_number_of_descriptors = 0;
1614 unsigned int start_frame_length = 0;
1615 unsigned int frame_length = 0;
1616 unsigned int head_length = 0;
1617 unsigned long irq_flags = 0;
1618 bool do_timestamp = false;
1619 bool ignore_sync = false;
1620 int nr_frags = 0;
1621 bool gso = false;
1622 int j;
1623
1624 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1625
1626 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1627 if (required_number_of_descriptors >
1628 lan743x_tx_get_avail_desc(tx)) {
1629 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1630 dev_kfree_skb(skb);
1631 } else {
1632 /* save to overflow buffer */
1633 tx->overflow_skb = skb;
1634 netif_stop_queue(tx->adapter->netdev);
1635 }
1636 goto unlock;
1637 }
1638
1639 /* space available, transmit skb */
1640 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1641 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1642 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1643 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1644 do_timestamp = true;
1645 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1646 ignore_sync = true;
1647 }
1648 head_length = skb_headlen(skb);
1649 frame_length = skb_pagelen(skb);
1650 nr_frags = skb_shinfo(skb)->nr_frags;
1651 start_frame_length = frame_length;
1652 gso = skb_is_gso(skb);
1653 if (gso) {
1654 start_frame_length = max(skb_shinfo(skb)->gso_size,
1655 (unsigned short)8);
1656 }
1657
1658 if (lan743x_tx_frame_start(tx,
1659 skb->data, head_length,
1660 start_frame_length,
1661 do_timestamp,
1662 skb->ip_summed == CHECKSUM_PARTIAL)) {
1663 dev_kfree_skb(skb);
1664 goto unlock;
1665 }
1666
1667 if (gso)
1668 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1669
1670 if (nr_frags <= 0)
1671 goto finish;
1672
1673 for (j = 0; j < nr_frags; j++) {
1674 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1675
1676 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1677 /* upon error no need to call
1678 * lan743x_tx_frame_end
1679 * frame assembler clean up was performed inside
1680 * lan743x_tx_frame_add_fragment
1681 */
1682 dev_kfree_skb(skb);
1683 goto unlock;
1684 }
1685 }
1686
1687finish:
1688 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1689
1690unlock:
1691 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1692 return NETDEV_TX_OK;
1693}
1694
1695static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1696{
1697 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1698 struct lan743x_adapter *adapter = tx->adapter;
1699 bool start_transmitter = false;
1700 unsigned long irq_flags = 0;
1701 u32 ioc_bit = 0;
1702 u32 int_sts = 0;
1703
1704 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1705 int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1706 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1707 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1708 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1709
1710 /* clean up tx ring */
1711 lan743x_tx_release_completed_descriptors(tx);
1712 if (netif_queue_stopped(adapter->netdev)) {
1713 if (tx->overflow_skb) {
1714 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1715 lan743x_tx_get_avail_desc(tx))
1716 start_transmitter = true;
1717 } else {
1718 netif_wake_queue(adapter->netdev);
1719 }
1720 }
1721 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1722
1723 if (start_transmitter) {
1724 /* space is now available, transmit overflow skb */
1725 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1726 tx->overflow_skb = NULL;
1727 netif_wake_queue(adapter->netdev);
1728 }
1729
1730 if (!napi_complete(napi))
1731 goto done;
1732
1733 /* enable isr */
1734 lan743x_csr_write(adapter, INT_EN_SET,
1735 INT_BIT_DMA_TX_(tx->channel_number));
1736 lan743x_csr_read(adapter, INT_STS);
1737
1738done:
1739 return 0;
1740}
1741
1742static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1743{
1744 if (tx->head_cpu_ptr) {
1745 dma_free_coherent(&tx->adapter->pdev->dev,
1746 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1747 tx->head_dma_ptr);
1748 tx->head_cpu_ptr = NULL;
1749 tx->head_dma_ptr = 0;
1750 }
1751 kfree(tx->buffer_info);
1752 tx->buffer_info = NULL;
1753
1754 if (tx->ring_cpu_ptr) {
1755 dma_free_coherent(&tx->adapter->pdev->dev,
1756 tx->ring_allocation_size, tx->ring_cpu_ptr,
1757 tx->ring_dma_ptr);
1758 tx->ring_allocation_size = 0;
1759 tx->ring_cpu_ptr = NULL;
1760 tx->ring_dma_ptr = 0;
1761 }
1762 tx->ring_size = 0;
1763}
1764
1765static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1766{
1767 size_t ring_allocation_size = 0;
1768 void *cpu_ptr = NULL;
1769 dma_addr_t dma_ptr;
1770 int ret = -ENOMEM;
1771
1772 tx->ring_size = LAN743X_TX_RING_SIZE;
1773 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1774 ret = -EINVAL;
1775 goto cleanup;
1776 }
1777 ring_allocation_size = ALIGN(tx->ring_size *
1778 sizeof(struct lan743x_tx_descriptor),
1779 PAGE_SIZE);
1780 dma_ptr = 0;
1781 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1782 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1783 if (!cpu_ptr) {
1784 ret = -ENOMEM;
1785 goto cleanup;
1786 }
1787
1788 tx->ring_allocation_size = ring_allocation_size;
1789 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1790 tx->ring_dma_ptr = dma_ptr;
1791
1792 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1793 if (!cpu_ptr) {
1794 ret = -ENOMEM;
1795 goto cleanup;
1796 }
1797 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1798 dma_ptr = 0;
1799 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1800 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1801 GFP_KERNEL);
1802 if (!cpu_ptr) {
1803 ret = -ENOMEM;
1804 goto cleanup;
1805 }
1806
1807 tx->head_cpu_ptr = cpu_ptr;
1808 tx->head_dma_ptr = dma_ptr;
1809 if (tx->head_dma_ptr & 0x3) {
1810 ret = -ENOMEM;
1811 goto cleanup;
1812 }
1813
1814 return 0;
1815
1816cleanup:
1817 lan743x_tx_ring_cleanup(tx);
1818 return ret;
1819}
1820
1821static void lan743x_tx_close(struct lan743x_tx *tx)
1822{
1823 struct lan743x_adapter *adapter = tx->adapter;
1824
1825 lan743x_csr_write(adapter,
1826 DMAC_CMD,
1827 DMAC_CMD_STOP_T_(tx->channel_number));
1828 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1829
1830 lan743x_csr_write(adapter,
1831 DMAC_INT_EN_CLR,
1832 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1833 lan743x_csr_write(adapter, INT_EN_CLR,
1834 INT_BIT_DMA_TX_(tx->channel_number));
1835 napi_disable(&tx->napi);
1836 netif_napi_del(&tx->napi);
1837
1838 lan743x_csr_write(adapter, FCT_TX_CTL,
1839 FCT_TX_CTL_DIS_(tx->channel_number));
1840 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1841 FCT_TX_CTL_EN_(tx->channel_number),
1842 0, 1000, 20000, 100);
1843
1844 lan743x_tx_release_all_descriptors(tx);
1845
1846 if (tx->overflow_skb) {
1847 dev_kfree_skb(tx->overflow_skb);
1848 tx->overflow_skb = NULL;
1849 }
1850
1851 lan743x_tx_ring_cleanup(tx);
1852}
1853
1854static int lan743x_tx_open(struct lan743x_tx *tx)
1855{
1856 struct lan743x_adapter *adapter = NULL;
1857 u32 data = 0;
1858 int ret;
1859
1860 adapter = tx->adapter;
1861 ret = lan743x_tx_ring_init(tx);
1862 if (ret)
1863 return ret;
1864
1865 /* initialize fifo */
1866 lan743x_csr_write(adapter, FCT_TX_CTL,
1867 FCT_TX_CTL_RESET_(tx->channel_number));
1868 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1869 FCT_TX_CTL_RESET_(tx->channel_number),
1870 0, 1000, 20000, 100);
1871
1872 /* enable fifo */
1873 lan743x_csr_write(adapter, FCT_TX_CTL,
1874 FCT_TX_CTL_EN_(tx->channel_number));
1875
1876 /* reset tx channel */
1877 lan743x_csr_write(adapter, DMAC_CMD,
1878 DMAC_CMD_TX_SWR_(tx->channel_number));
1879 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1880 DMAC_CMD_TX_SWR_(tx->channel_number),
1881 0, 1000, 20000, 100);
1882
1883 /* Write TX_BASE_ADDR */
1884 lan743x_csr_write(adapter,
1885 TX_BASE_ADDRH(tx->channel_number),
1886 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1887 lan743x_csr_write(adapter,
1888 TX_BASE_ADDRL(tx->channel_number),
1889 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1890
1891 /* Write TX_CFG_B */
1892 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1893 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1894 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1895 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1896 data |= TX_CFG_B_TDMABL_512_;
1897 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1898
1899 /* Write TX_CFG_A */
1900 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1901 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1902 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1903 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1904 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1905 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1906 }
1907 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1908
1909 /* Write TX_HEAD_WRITEBACK_ADDR */
1910 lan743x_csr_write(adapter,
1911 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1912 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1913 lan743x_csr_write(adapter,
1914 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1915 DMA_ADDR_LOW32(tx->head_dma_ptr));
1916
1917 /* set last head */
1918 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1919
1920 /* write TX_TAIL */
1921 tx->last_tail = 0;
1922 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1923 (u32)(tx->last_tail));
1924 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1925 INT_BIT_DMA_TX_
1926 (tx->channel_number));
1927 netif_tx_napi_add(adapter->netdev,
1928 &tx->napi, lan743x_tx_napi_poll,
1929 tx->ring_size - 1);
1930 napi_enable(&tx->napi);
1931
1932 data = 0;
1933 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1934 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1935 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1936 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1937 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1938 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1939 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1940 data |= TX_CFG_C_TX_INT_EN_R2C_;
1941 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1942
1943 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1944 lan743x_csr_write(adapter, INT_EN_SET,
1945 INT_BIT_DMA_TX_(tx->channel_number));
1946 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1947 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1948
1949 /* start dmac channel */
1950 lan743x_csr_write(adapter, DMAC_CMD,
1951 DMAC_CMD_START_T_(tx->channel_number));
1952 return 0;
1953}
1954
1955static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1956{
1957 return ((++index) % rx->ring_size);
1958}
1959
1960static struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx)
1961{
1962 int length = 0;
1963
1964 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1965 return __netdev_alloc_skb(rx->adapter->netdev,
1966 length, GFP_ATOMIC | GFP_DMA);
1967}
1968
1969static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
1970 struct sk_buff *skb)
1971{
1972 struct lan743x_rx_buffer_info *buffer_info;
1973 struct lan743x_rx_descriptor *descriptor;
1974 int length = 0;
1975
1976 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1977 descriptor = &rx->ring_cpu_ptr[index];
1978 buffer_info = &rx->buffer_info[index];
1979 buffer_info->skb = skb;
1980 if (!(buffer_info->skb))
1981 return -ENOMEM;
1982 buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1983 buffer_info->skb->data,
1984 length,
1985 DMA_FROM_DEVICE);
1986 if (dma_mapping_error(&rx->adapter->pdev->dev,
1987 buffer_info->dma_ptr)) {
1988 buffer_info->dma_ptr = 0;
1989 return -ENOMEM;
1990 }
1991
1992 buffer_info->buffer_length = length;
1993 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1994 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1995 descriptor->data3 = 0;
1996 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1997 (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1998 skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1999
2000 return 0;
2001}
2002
2003static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
2004{
2005 struct lan743x_rx_buffer_info *buffer_info;
2006 struct lan743x_rx_descriptor *descriptor;
2007
2008 descriptor = &rx->ring_cpu_ptr[index];
2009 buffer_info = &rx->buffer_info[index];
2010
2011 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
2012 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
2013 descriptor->data3 = 0;
2014 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
2015 ((buffer_info->buffer_length) &
2016 RX_DESC_DATA0_BUF_LENGTH_MASK_));
2017}
2018
2019static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2020{
2021 struct lan743x_rx_buffer_info *buffer_info;
2022 struct lan743x_rx_descriptor *descriptor;
2023
2024 descriptor = &rx->ring_cpu_ptr[index];
2025 buffer_info = &rx->buffer_info[index];
2026
2027 memset(descriptor, 0, sizeof(*descriptor));
2028
2029 if (buffer_info->dma_ptr) {
2030 dma_unmap_single(&rx->adapter->pdev->dev,
2031 buffer_info->dma_ptr,
2032 buffer_info->buffer_length,
2033 DMA_FROM_DEVICE);
2034 buffer_info->dma_ptr = 0;
2035 }
2036
2037 if (buffer_info->skb) {
2038 dev_kfree_skb(buffer_info->skb);
2039 buffer_info->skb = NULL;
2040 }
2041
2042 memset(buffer_info, 0, sizeof(*buffer_info));
2043}
2044
2045static int lan743x_rx_process_packet(struct lan743x_rx *rx)
2046{
2047 struct skb_shared_hwtstamps *hwtstamps = NULL;
2048 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2049 int current_head_index = *rx->head_cpu_ptr;
2050 struct lan743x_rx_buffer_info *buffer_info;
2051 struct lan743x_rx_descriptor *descriptor;
2052 int extension_index = -1;
2053 int first_index = -1;
2054 int last_index = -1;
2055
2056 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2057 goto done;
2058
2059 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2060 goto done;
2061
2062 if (rx->last_head != current_head_index) {
2063 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2064 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2065 goto done;
2066
2067 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
2068 goto done;
2069
2070 first_index = rx->last_head;
2071 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2072 last_index = rx->last_head;
2073 } else {
2074 int index;
2075
2076 index = lan743x_rx_next_index(rx, first_index);
2077 while (index != current_head_index) {
2078 descriptor = &rx->ring_cpu_ptr[index];
2079 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2080 goto done;
2081
2082 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2083 last_index = index;
2084 break;
2085 }
2086 index = lan743x_rx_next_index(rx, index);
2087 }
2088 }
2089 if (last_index >= 0) {
2090 descriptor = &rx->ring_cpu_ptr[last_index];
2091 if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2092 /* extension is expected to follow */
2093 int index = lan743x_rx_next_index(rx,
2094 last_index);
2095 if (index != current_head_index) {
2096 descriptor = &rx->ring_cpu_ptr[index];
2097 if (descriptor->data0 &
2098 RX_DESC_DATA0_OWN_) {
2099 goto done;
2100 }
2101 if (descriptor->data0 &
2102 RX_DESC_DATA0_EXT_) {
2103 extension_index = index;
2104 } else {
2105 goto done;
2106 }
2107 } else {
2108 /* extension is not yet available */
2109 /* prevent processing of this packet */
2110 first_index = -1;
2111 last_index = -1;
2112 }
2113 }
2114 }
2115 }
2116 if (first_index >= 0 && last_index >= 0) {
2117 int real_last_index = last_index;
2118 struct sk_buff *skb = NULL;
2119 u32 ts_sec = 0;
2120 u32 ts_nsec = 0;
2121
2122 /* packet is available */
2123 if (first_index == last_index) {
2124 /* single buffer packet */
2125 struct sk_buff *new_skb = NULL;
2126 int packet_length;
2127
2128 new_skb = lan743x_rx_allocate_skb(rx);
2129 if (!new_skb) {
2130 /* failed to allocate next skb.
2131 * Memory is very low.
2132 * Drop this packet and reuse buffer.
2133 */
2134 lan743x_rx_reuse_ring_element(rx, first_index);
2135 goto process_extension;
2136 }
2137
2138 buffer_info = &rx->buffer_info[first_index];
2139 skb = buffer_info->skb;
2140 descriptor = &rx->ring_cpu_ptr[first_index];
2141
2142 /* unmap from dma */
2143 if (buffer_info->dma_ptr) {
2144 dma_unmap_single(&rx->adapter->pdev->dev,
2145 buffer_info->dma_ptr,
2146 buffer_info->buffer_length,
2147 DMA_FROM_DEVICE);
2148 buffer_info->dma_ptr = 0;
2149 buffer_info->buffer_length = 0;
2150 }
2151 buffer_info->skb = NULL;
2152 packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2153 (descriptor->data0);
2154 skb_put(skb, packet_length - 4);
2155 skb->protocol = eth_type_trans(skb,
2156 rx->adapter->netdev);
2157 lan743x_rx_init_ring_element(rx, first_index, new_skb);
2158 } else {
2159 int index = first_index;
2160
2161 /* multi buffer packet not supported */
2162 /* this should not happen since
2163 * buffers are allocated to be at least jumbo size
2164 */
2165
2166 /* clean up buffers */
2167 if (first_index <= last_index) {
2168 while ((index >= first_index) &&
2169 (index <= last_index)) {
2170 lan743x_rx_reuse_ring_element(rx,
2171 index);
2172 index = lan743x_rx_next_index(rx,
2173 index);
2174 }
2175 } else {
2176 while ((index >= first_index) ||
2177 (index <= last_index)) {
2178 lan743x_rx_reuse_ring_element(rx,
2179 index);
2180 index = lan743x_rx_next_index(rx,
2181 index);
2182 }
2183 }
2184 }
2185
2186process_extension:
2187 if (extension_index >= 0) {
2188 descriptor = &rx->ring_cpu_ptr[extension_index];
2189 buffer_info = &rx->buffer_info[extension_index];
2190
2191 ts_sec = descriptor->data1;
2192 ts_nsec = (descriptor->data2 &
2193 RX_DESC_DATA2_TS_NS_MASK_);
2194 lan743x_rx_reuse_ring_element(rx, extension_index);
2195 real_last_index = extension_index;
2196 }
2197
2198 if (!skb) {
2199 result = RX_PROCESS_RESULT_PACKET_DROPPED;
2200 goto move_forward;
2201 }
2202
2203 if (extension_index < 0)
2204 goto pass_packet_to_os;
2205 hwtstamps = skb_hwtstamps(skb);
2206 if (hwtstamps)
2207 hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2208
2209pass_packet_to_os:
2210 /* pass packet to OS */
2211 napi_gro_receive(&rx->napi, skb);
2212 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2213
2214move_forward:
2215 /* push tail and head forward */
2216 rx->last_tail = real_last_index;
2217 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2218 }
2219done:
2220 return result;
2221}
2222
2223static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2224{
2225 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2226 struct lan743x_adapter *adapter = rx->adapter;
2227 u32 rx_tail_flags = 0;
2228 int count;
2229
2230 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2231 /* clear int status bit before reading packet */
2232 lan743x_csr_write(adapter, DMAC_INT_STS,
2233 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2234 }
2235 count = 0;
2236 while (count < weight) {
2237 int rx_process_result = lan743x_rx_process_packet(rx);
2238
2239 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2240 count++;
2241 } else if (rx_process_result ==
2242 RX_PROCESS_RESULT_NOTHING_TO_DO) {
2243 break;
2244 } else if (rx_process_result ==
2245 RX_PROCESS_RESULT_PACKET_DROPPED) {
2246 continue;
2247 }
2248 }
2249 rx->frame_count += count;
2250 if (count == weight)
2251 goto done;
2252
2253 if (!napi_complete_done(napi, count))
2254 goto done;
2255
2256 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2257 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2258 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2259 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2260 } else {
2261 lan743x_csr_write(adapter, INT_EN_SET,
2262 INT_BIT_DMA_RX_(rx->channel_number));
2263 }
2264
2265 /* update RX_TAIL */
2266 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2267 rx_tail_flags | rx->last_tail);
2268done:
2269 return count;
2270}
2271
2272static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2273{
2274 if (rx->buffer_info && rx->ring_cpu_ptr) {
2275 int index;
2276
2277 for (index = 0; index < rx->ring_size; index++)
2278 lan743x_rx_release_ring_element(rx, index);
2279 }
2280
2281 if (rx->head_cpu_ptr) {
2282 dma_free_coherent(&rx->adapter->pdev->dev,
2283 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2284 rx->head_dma_ptr);
2285 rx->head_cpu_ptr = NULL;
2286 rx->head_dma_ptr = 0;
2287 }
2288
2289 kfree(rx->buffer_info);
2290 rx->buffer_info = NULL;
2291
2292 if (rx->ring_cpu_ptr) {
2293 dma_free_coherent(&rx->adapter->pdev->dev,
2294 rx->ring_allocation_size, rx->ring_cpu_ptr,
2295 rx->ring_dma_ptr);
2296 rx->ring_allocation_size = 0;
2297 rx->ring_cpu_ptr = NULL;
2298 rx->ring_dma_ptr = 0;
2299 }
2300
2301 rx->ring_size = 0;
2302 rx->last_head = 0;
2303}
2304
2305static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2306{
2307 size_t ring_allocation_size = 0;
2308 dma_addr_t dma_ptr = 0;
2309 void *cpu_ptr = NULL;
2310 int ret = -ENOMEM;
2311 int index = 0;
2312
2313 rx->ring_size = LAN743X_RX_RING_SIZE;
2314 if (rx->ring_size <= 1) {
2315 ret = -EINVAL;
2316 goto cleanup;
2317 }
2318 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2319 ret = -EINVAL;
2320 goto cleanup;
2321 }
2322 ring_allocation_size = ALIGN(rx->ring_size *
2323 sizeof(struct lan743x_rx_descriptor),
2324 PAGE_SIZE);
2325 dma_ptr = 0;
2326 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2327 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2328 if (!cpu_ptr) {
2329 ret = -ENOMEM;
2330 goto cleanup;
2331 }
2332 rx->ring_allocation_size = ring_allocation_size;
2333 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2334 rx->ring_dma_ptr = dma_ptr;
2335
2336 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2337 GFP_KERNEL);
2338 if (!cpu_ptr) {
2339 ret = -ENOMEM;
2340 goto cleanup;
2341 }
2342 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2343 dma_ptr = 0;
2344 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2345 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2346 GFP_KERNEL);
2347 if (!cpu_ptr) {
2348 ret = -ENOMEM;
2349 goto cleanup;
2350 }
2351
2352 rx->head_cpu_ptr = cpu_ptr;
2353 rx->head_dma_ptr = dma_ptr;
2354 if (rx->head_dma_ptr & 0x3) {
2355 ret = -ENOMEM;
2356 goto cleanup;
2357 }
2358
2359 rx->last_head = 0;
2360 for (index = 0; index < rx->ring_size; index++) {
2361 struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx);
2362
2363 ret = lan743x_rx_init_ring_element(rx, index, new_skb);
2364 if (ret)
2365 goto cleanup;
2366 }
2367 return 0;
2368
2369cleanup:
2370 lan743x_rx_ring_cleanup(rx);
2371 return ret;
2372}
2373
2374static void lan743x_rx_close(struct lan743x_rx *rx)
2375{
2376 struct lan743x_adapter *adapter = rx->adapter;
2377
2378 lan743x_csr_write(adapter, FCT_RX_CTL,
2379 FCT_RX_CTL_DIS_(rx->channel_number));
2380 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2381 FCT_RX_CTL_EN_(rx->channel_number),
2382 0, 1000, 20000, 100);
2383
2384 lan743x_csr_write(adapter, DMAC_CMD,
2385 DMAC_CMD_STOP_R_(rx->channel_number));
2386 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2387
2388 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2389 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2390 lan743x_csr_write(adapter, INT_EN_CLR,
2391 INT_BIT_DMA_RX_(rx->channel_number));
2392 napi_disable(&rx->napi);
2393
2394 netif_napi_del(&rx->napi);
2395
2396 lan743x_rx_ring_cleanup(rx);
2397}
2398
2399static int lan743x_rx_open(struct lan743x_rx *rx)
2400{
2401 struct lan743x_adapter *adapter = rx->adapter;
2402 u32 data = 0;
2403 int ret;
2404
2405 rx->frame_count = 0;
2406 ret = lan743x_rx_ring_init(rx);
2407 if (ret)
2408 goto return_error;
2409
2410 netif_napi_add(adapter->netdev,
2411 &rx->napi, lan743x_rx_napi_poll,
2412 rx->ring_size - 1);
2413
2414 lan743x_csr_write(adapter, DMAC_CMD,
2415 DMAC_CMD_RX_SWR_(rx->channel_number));
2416 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2417 DMAC_CMD_RX_SWR_(rx->channel_number),
2418 0, 1000, 20000, 100);
2419
2420 /* set ring base address */
2421 lan743x_csr_write(adapter,
2422 RX_BASE_ADDRH(rx->channel_number),
2423 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2424 lan743x_csr_write(adapter,
2425 RX_BASE_ADDRL(rx->channel_number),
2426 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2427
2428 /* set rx write back address */
2429 lan743x_csr_write(adapter,
2430 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2431 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2432 lan743x_csr_write(adapter,
2433 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2434 DMA_ADDR_LOW32(rx->head_dma_ptr));
2435 data = RX_CFG_A_RX_HP_WB_EN_;
2436 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2437 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2438 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2439 RX_CFG_A_RX_PF_THRES_SET_(16) |
2440 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2441 }
2442
2443 /* set RX_CFG_A */
2444 lan743x_csr_write(adapter,
2445 RX_CFG_A(rx->channel_number), data);
2446
2447 /* set RX_CFG_B */
2448 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2449 data &= ~RX_CFG_B_RX_PAD_MASK_;
2450 if (!RX_HEAD_PADDING)
2451 data |= RX_CFG_B_RX_PAD_0_;
2452 else
2453 data |= RX_CFG_B_RX_PAD_2_;
2454 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2455 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2456 data |= RX_CFG_B_TS_ALL_RX_;
2457 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2458 data |= RX_CFG_B_RDMABL_512_;
2459
2460 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2461 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2462 INT_BIT_DMA_RX_
2463 (rx->channel_number));
2464
2465 /* set RX_CFG_C */
2466 data = 0;
2467 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2468 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2469 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2470 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2471 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2472 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2473 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2474 data |= RX_CFG_C_RX_INT_EN_R2C_;
2475 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2476
2477 rx->last_tail = ((u32)(rx->ring_size - 1));
2478 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2479 rx->last_tail);
2480 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2481 if (rx->last_head) {
2482 ret = -EIO;
2483 goto napi_delete;
2484 }
2485
2486 napi_enable(&rx->napi);
2487
2488 lan743x_csr_write(adapter, INT_EN_SET,
2489 INT_BIT_DMA_RX_(rx->channel_number));
2490 lan743x_csr_write(adapter, DMAC_INT_STS,
2491 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2492 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2493 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2494 lan743x_csr_write(adapter, DMAC_CMD,
2495 DMAC_CMD_START_R_(rx->channel_number));
2496
2497 /* initialize fifo */
2498 lan743x_csr_write(adapter, FCT_RX_CTL,
2499 FCT_RX_CTL_RESET_(rx->channel_number));
2500 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2501 FCT_RX_CTL_RESET_(rx->channel_number),
2502 0, 1000, 20000, 100);
2503 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2504 FCT_FLOW_CTL_REQ_EN_ |
2505 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2506 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2507
2508 /* enable fifo */
2509 lan743x_csr_write(adapter, FCT_RX_CTL,
2510 FCT_RX_CTL_EN_(rx->channel_number));
2511 return 0;
2512
2513napi_delete:
2514 netif_napi_del(&rx->napi);
2515 lan743x_rx_ring_cleanup(rx);
2516
2517return_error:
2518 return ret;
2519}
2520
2521static int lan743x_netdev_close(struct net_device *netdev)
2522{
2523 struct lan743x_adapter *adapter = netdev_priv(netdev);
2524 int index;
2525
2526 lan743x_tx_close(&adapter->tx[0]);
2527
2528 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2529 lan743x_rx_close(&adapter->rx[index]);
2530
2531 lan743x_ptp_close(adapter);
2532
2533 lan743x_phy_close(adapter);
2534
2535 lan743x_mac_close(adapter);
2536
2537 lan743x_intr_close(adapter);
2538
2539 return 0;
2540}
2541
2542static int lan743x_netdev_open(struct net_device *netdev)
2543{
2544 struct lan743x_adapter *adapter = netdev_priv(netdev);
2545 int index;
2546 int ret;
2547
2548 ret = lan743x_intr_open(adapter);
2549 if (ret)
2550 goto return_error;
2551
2552 ret = lan743x_mac_open(adapter);
2553 if (ret)
2554 goto close_intr;
2555
2556 ret = lan743x_phy_open(adapter);
2557 if (ret)
2558 goto close_mac;
2559
2560 ret = lan743x_ptp_open(adapter);
2561 if (ret)
2562 goto close_phy;
2563
2564 lan743x_rfe_open(adapter);
2565
2566 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2567 ret = lan743x_rx_open(&adapter->rx[index]);
2568 if (ret)
2569 goto close_rx;
2570 }
2571
2572 ret = lan743x_tx_open(&adapter->tx[0]);
2573 if (ret)
2574 goto close_rx;
2575
2576 return 0;
2577
2578close_rx:
2579 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2580 if (adapter->rx[index].ring_cpu_ptr)
2581 lan743x_rx_close(&adapter->rx[index]);
2582 }
2583 lan743x_ptp_close(adapter);
2584
2585close_phy:
2586 lan743x_phy_close(adapter);
2587
2588close_mac:
2589 lan743x_mac_close(adapter);
2590
2591close_intr:
2592 lan743x_intr_close(adapter);
2593
2594return_error:
2595 netif_warn(adapter, ifup, adapter->netdev,
2596 "Error opening LAN743x\n");
2597 return ret;
2598}
2599
2600static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2601 struct net_device *netdev)
2602{
2603 struct lan743x_adapter *adapter = netdev_priv(netdev);
2604
2605 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2606}
2607
2608static int lan743x_netdev_ioctl(struct net_device *netdev,
2609 struct ifreq *ifr, int cmd)
2610{
2611 if (!netif_running(netdev))
2612 return -EINVAL;
2613 if (cmd == SIOCSHWTSTAMP)
2614 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2615 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2616}
2617
2618static void lan743x_netdev_set_multicast(struct net_device *netdev)
2619{
2620 struct lan743x_adapter *adapter = netdev_priv(netdev);
2621
2622 lan743x_rfe_set_multicast(adapter);
2623}
2624
2625static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2626{
2627 struct lan743x_adapter *adapter = netdev_priv(netdev);
2628 int ret = 0;
2629
2630 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2631 if (!ret)
2632 netdev->mtu = new_mtu;
2633 return ret;
2634}
2635
2636static void lan743x_netdev_get_stats64(struct net_device *netdev,
2637 struct rtnl_link_stats64 *stats)
2638{
2639 struct lan743x_adapter *adapter = netdev_priv(netdev);
2640
2641 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2642 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2643 stats->rx_bytes = lan743x_csr_read(adapter,
2644 STAT_RX_UNICAST_BYTE_COUNT) +
2645 lan743x_csr_read(adapter,
2646 STAT_RX_BROADCAST_BYTE_COUNT) +
2647 lan743x_csr_read(adapter,
2648 STAT_RX_MULTICAST_BYTE_COUNT);
2649 stats->tx_bytes = lan743x_csr_read(adapter,
2650 STAT_TX_UNICAST_BYTE_COUNT) +
2651 lan743x_csr_read(adapter,
2652 STAT_TX_BROADCAST_BYTE_COUNT) +
2653 lan743x_csr_read(adapter,
2654 STAT_TX_MULTICAST_BYTE_COUNT);
2655 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2656 lan743x_csr_read(adapter,
2657 STAT_RX_ALIGNMENT_ERRORS) +
2658 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2659 lan743x_csr_read(adapter,
2660 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2661 lan743x_csr_read(adapter,
2662 STAT_RX_OVERSIZE_FRAME_ERRORS);
2663 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2664 lan743x_csr_read(adapter,
2665 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2666 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2667 stats->rx_dropped = lan743x_csr_read(adapter,
2668 STAT_RX_DROPPED_FRAMES);
2669 stats->tx_dropped = lan743x_csr_read(adapter,
2670 STAT_TX_EXCESSIVE_COLLISION);
2671 stats->multicast = lan743x_csr_read(adapter,
2672 STAT_RX_MULTICAST_FRAMES) +
2673 lan743x_csr_read(adapter,
2674 STAT_TX_MULTICAST_FRAMES);
2675 stats->collisions = lan743x_csr_read(adapter,
2676 STAT_TX_SINGLE_COLLISIONS) +
2677 lan743x_csr_read(adapter,
2678 STAT_TX_MULTIPLE_COLLISIONS) +
2679 lan743x_csr_read(adapter,
2680 STAT_TX_LATE_COLLISIONS);
2681}
2682
2683static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2684 void *addr)
2685{
2686 struct lan743x_adapter *adapter = netdev_priv(netdev);
2687 struct sockaddr *sock_addr = addr;
2688 int ret;
2689
2690 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2691 if (ret)
2692 return ret;
2693 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2694 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2695 lan743x_rfe_update_mac_address(adapter);
2696 return 0;
2697}
2698
2699static const struct net_device_ops lan743x_netdev_ops = {
2700 .ndo_open = lan743x_netdev_open,
2701 .ndo_stop = lan743x_netdev_close,
2702 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2703 .ndo_do_ioctl = lan743x_netdev_ioctl,
2704 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2705 .ndo_change_mtu = lan743x_netdev_change_mtu,
2706 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2707 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2708};
2709
2710static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2711{
2712 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2713}
2714
2715static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2716{
2717 mdiobus_unregister(adapter->mdiobus);
2718}
2719
2720static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2721{
2722 unregister_netdev(adapter->netdev);
2723
2724 lan743x_mdiobus_cleanup(adapter);
2725 lan743x_hardware_cleanup(adapter);
2726 lan743x_pci_cleanup(adapter);
2727}
2728
2729static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2730 struct pci_dev *pdev)
2731{
2732 struct lan743x_tx *tx;
2733 int index;
2734 int ret;
2735
2736 adapter->intr.irq = adapter->pdev->irq;
2737 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2738 mutex_init(&adapter->dp_lock);
2739
2740 ret = lan743x_gpio_init(adapter);
2741 if (ret)
2742 return ret;
2743
2744 ret = lan743x_mac_init(adapter);
2745 if (ret)
2746 return ret;
2747
2748 ret = lan743x_phy_init(adapter);
2749 if (ret)
2750 return ret;
2751
2752 ret = lan743x_ptp_init(adapter);
2753 if (ret)
2754 return ret;
2755
2756 lan743x_rfe_update_mac_address(adapter);
2757
2758 ret = lan743x_dmac_init(adapter);
2759 if (ret)
2760 return ret;
2761
2762 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2763 adapter->rx[index].adapter = adapter;
2764 adapter->rx[index].channel_number = index;
2765 }
2766
2767 tx = &adapter->tx[0];
2768 tx->adapter = adapter;
2769 tx->channel_number = 0;
2770 spin_lock_init(&tx->ring_lock);
2771 return 0;
2772}
2773
2774static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2775{
2776 int ret;
2777
2778 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2779 if (!(adapter->mdiobus)) {
2780 ret = -ENOMEM;
2781 goto return_error;
2782 }
2783
2784 adapter->mdiobus->priv = (void *)adapter;
2785 adapter->mdiobus->read = lan743x_mdiobus_read;
2786 adapter->mdiobus->write = lan743x_mdiobus_write;
2787 adapter->mdiobus->name = "lan743x-mdiobus";
2788 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2789 "pci-%s", pci_name(adapter->pdev));
2790
2791 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2792 /* LAN7430 uses internal phy at address 1 */
2793 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2794
2795 /* register mdiobus */
2796 ret = mdiobus_register(adapter->mdiobus);
2797 if (ret < 0)
2798 goto return_error;
2799 return 0;
2800
2801return_error:
2802 return ret;
2803}
2804
2805/* lan743x_pcidev_probe - Device Initialization Routine
2806 * @pdev: PCI device information struct
2807 * @id: entry in lan743x_pci_tbl
2808 *
2809 * Returns 0 on success, negative on failure
2810 *
2811 * initializes an adapter identified by a pci_dev structure.
2812 * The OS initialization, configuring of the adapter private structure,
2813 * and a hardware reset occur.
2814 **/
2815static int lan743x_pcidev_probe(struct pci_dev *pdev,
2816 const struct pci_device_id *id)
2817{
2818 struct lan743x_adapter *adapter = NULL;
2819 struct net_device *netdev = NULL;
2820 const void *mac_addr;
2821 int ret = -ENODEV;
2822
2823 netdev = devm_alloc_etherdev(&pdev->dev,
2824 sizeof(struct lan743x_adapter));
2825 if (!netdev)
2826 goto return_error;
2827
2828 SET_NETDEV_DEV(netdev, &pdev->dev);
2829 pci_set_drvdata(pdev, netdev);
2830 adapter = netdev_priv(netdev);
2831 adapter->netdev = netdev;
2832 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2833 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2834 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2835 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2836
2837 mac_addr = of_get_mac_address(pdev->dev.of_node);
2838 if (!IS_ERR(mac_addr))
2839 ether_addr_copy(adapter->mac_address, mac_addr);
2840
2841 ret = lan743x_pci_init(adapter, pdev);
2842 if (ret)
2843 goto return_error;
2844
2845 ret = lan743x_csr_init(adapter);
2846 if (ret)
2847 goto cleanup_pci;
2848
2849 ret = lan743x_hardware_init(adapter, pdev);
2850 if (ret)
2851 goto cleanup_pci;
2852
2853 ret = lan743x_mdiobus_init(adapter);
2854 if (ret)
2855 goto cleanup_hardware;
2856
2857 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2858 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2859 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2860 adapter->netdev->hw_features = adapter->netdev->features;
2861
2862 /* carrier off reporting is important to ethtool even BEFORE open */
2863 netif_carrier_off(netdev);
2864
2865 ret = register_netdev(adapter->netdev);
2866 if (ret < 0)
2867 goto cleanup_mdiobus;
2868 return 0;
2869
2870cleanup_mdiobus:
2871 lan743x_mdiobus_cleanup(adapter);
2872
2873cleanup_hardware:
2874 lan743x_hardware_cleanup(adapter);
2875
2876cleanup_pci:
2877 lan743x_pci_cleanup(adapter);
2878
2879return_error:
2880 pr_warn("Initialization failed\n");
2881 return ret;
2882}
2883
2884/**
2885 * lan743x_pcidev_remove - Device Removal Routine
2886 * @pdev: PCI device information struct
2887 *
2888 * this is called by the PCI subsystem to alert the driver
2889 * that it should release a PCI device. This could be caused by a
2890 * Hot-Plug event, or because the driver is going to be removed from
2891 * memory.
2892 **/
2893static void lan743x_pcidev_remove(struct pci_dev *pdev)
2894{
2895 struct net_device *netdev = pci_get_drvdata(pdev);
2896 struct lan743x_adapter *adapter = netdev_priv(netdev);
2897
2898 lan743x_full_cleanup(adapter);
2899}
2900
2901static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2902{
2903 struct net_device *netdev = pci_get_drvdata(pdev);
2904 struct lan743x_adapter *adapter = netdev_priv(netdev);
2905
2906 rtnl_lock();
2907 netif_device_detach(netdev);
2908
2909 /* close netdev when netdev is at running state.
2910 * For instance, it is true when system goes to sleep by pm-suspend
2911 * However, it is false when system goes to sleep by suspend GUI menu
2912 */
2913 if (netif_running(netdev))
2914 lan743x_netdev_close(netdev);
2915 rtnl_unlock();
2916
2917#ifdef CONFIG_PM
2918 pci_save_state(pdev);
2919#endif
2920
2921 /* clean up lan743x portion */
2922 lan743x_hardware_cleanup(adapter);
2923}
2924
2925#ifdef CONFIG_PM_SLEEP
2926static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2927{
2928 return bitrev16(crc16(0xFFFF, buf, len));
2929}
2930
2931static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2932{
2933 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2934 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2935 const u8 arp_type[2] = { 0x08, 0x06 };
2936 int mask_index;
2937 u32 pmtctl;
2938 u32 wucsr;
2939 u32 macrx;
2940 u16 crc;
2941
2942 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2943 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2944
2945 /* clear wake settings */
2946 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2947 pmtctl |= PMT_CTL_WUPS_MASK_;
2948 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2949 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2950 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2951
2952 macrx = lan743x_csr_read(adapter, MAC_RX);
2953
2954 wucsr = 0;
2955 mask_index = 0;
2956
2957 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2958
2959 if (adapter->wolopts & WAKE_PHY) {
2960 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2961 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2962 }
2963 if (adapter->wolopts & WAKE_MAGIC) {
2964 wucsr |= MAC_WUCSR_MPEN_;
2965 macrx |= MAC_RX_RXEN_;
2966 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2967 }
2968 if (adapter->wolopts & WAKE_UCAST) {
2969 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_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_BCAST) {
2975 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2976 macrx |= MAC_RX_RXEN_;
2977 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2978 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2979 }
2980 if (adapter->wolopts & WAKE_MCAST) {
2981 /* IPv4 multicast */
2982 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2983 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2984 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2985 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2986 (crc & MAC_WUF_CFG_CRC16_MASK_));
2987 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2988 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2989 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2990 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2991 mask_index++;
2992
2993 /* IPv6 multicast */
2994 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2995 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2996 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2997 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2998 (crc & MAC_WUF_CFG_CRC16_MASK_));
2999 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
3000 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3001 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3002 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3003 mask_index++;
3004
3005 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3006 macrx |= MAC_RX_RXEN_;
3007 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3008 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3009 }
3010 if (adapter->wolopts & WAKE_ARP) {
3011 /* set MAC_WUF_CFG & WUF_MASK
3012 * for packettype (offset 12,13) = ARP (0x0806)
3013 */
3014 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
3015 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3016 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
3017 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3018 (crc & MAC_WUF_CFG_CRC16_MASK_));
3019 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
3020 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3021 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3022 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3023 mask_index++;
3024
3025 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3026 macrx |= MAC_RX_RXEN_;
3027 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3028 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3029 }
3030
3031 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3032 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3033 lan743x_csr_write(adapter, MAC_RX, macrx);
3034}
3035
3036static int lan743x_pm_suspend(struct device *dev)
3037{
3038 struct pci_dev *pdev = to_pci_dev(dev);
3039 struct net_device *netdev = pci_get_drvdata(pdev);
3040 struct lan743x_adapter *adapter = netdev_priv(netdev);
3041 int ret;
3042
3043 lan743x_pcidev_shutdown(pdev);
3044
3045 /* clear all wakes */
3046 lan743x_csr_write(adapter, MAC_WUCSR, 0);
3047 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3048 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3049
3050 if (adapter->wolopts)
3051 lan743x_pm_set_wol(adapter);
3052
3053 /* Host sets PME_En, put D3hot */
3054 ret = pci_prepare_to_sleep(pdev);
3055
3056 return 0;
3057}
3058
3059static int lan743x_pm_resume(struct device *dev)
3060{
3061 struct pci_dev *pdev = to_pci_dev(dev);
3062 struct net_device *netdev = pci_get_drvdata(pdev);
3063 struct lan743x_adapter *adapter = netdev_priv(netdev);
3064 int ret;
3065
3066 pci_set_power_state(pdev, PCI_D0);
3067 pci_restore_state(pdev);
3068 pci_save_state(pdev);
3069
3070 ret = lan743x_hardware_init(adapter, pdev);
3071 if (ret) {
3072 netif_err(adapter, probe, adapter->netdev,
3073 "lan743x_hardware_init returned %d\n", ret);
3074 }
3075
3076 /* open netdev when netdev is at running state while resume.
3077 * For instance, it is true when system wakesup after pm-suspend
3078 * However, it is false when system wakes up after suspend GUI menu
3079 */
3080 if (netif_running(netdev))
3081 lan743x_netdev_open(netdev);
3082
3083 netif_device_attach(netdev);
3084
3085 return 0;
3086}
3087
3088static const struct dev_pm_ops lan743x_pm_ops = {
3089 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3090};
3091#endif /* CONFIG_PM_SLEEP */
3092
3093static const struct pci_device_id lan743x_pcidev_tbl[] = {
3094 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3095 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3096 { 0, }
3097};
3098
3099MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3100
3101static struct pci_driver lan743x_pcidev_driver = {
3102 .name = DRIVER_NAME,
3103 .id_table = lan743x_pcidev_tbl,
3104 .probe = lan743x_pcidev_probe,
3105 .remove = lan743x_pcidev_remove,
3106#ifdef CONFIG_PM_SLEEP
3107 .driver.pm = &lan743x_pm_ops,
3108#endif
3109 .shutdown = lan743x_pcidev_shutdown,
3110};
3111
3112module_pci_driver(lan743x_pcidev_driver);
3113
3114MODULE_AUTHOR(DRIVER_AUTHOR);
3115MODULE_DESCRIPTION(DRIVER_DESC);
3116MODULE_LICENSE("GPL");