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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/phy.h>
12#include <linux/rtnetlink.h>
13#include <linux/iopoll.h>
14#include "lan743x_main.h"
15
16static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
17{
18 pci_release_selected_regions(adapter->pdev,
19 pci_select_bars(adapter->pdev,
20 IORESOURCE_MEM));
21 pci_disable_device(adapter->pdev);
22}
23
24static int lan743x_pci_init(struct lan743x_adapter *adapter,
25 struct pci_dev *pdev)
26{
27 unsigned long bars = 0;
28 int ret;
29
30 adapter->pdev = pdev;
31 ret = pci_enable_device_mem(pdev);
32 if (ret)
33 goto return_error;
34
35 netif_info(adapter, probe, adapter->netdev,
36 "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
37 pdev->vendor, pdev->device);
38 bars = pci_select_bars(pdev, IORESOURCE_MEM);
39 if (!test_bit(0, &bars))
40 goto disable_device;
41
42 ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
43 if (ret)
44 goto disable_device;
45
46 pci_set_master(pdev);
47 return 0;
48
49disable_device:
50 pci_disable_device(adapter->pdev);
51
52return_error:
53 return ret;
54}
55
56static u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
57{
58 return ioread32(&adapter->csr.csr_address[offset]);
59}
60
61static void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
62 u32 data)
63{
64 iowrite32(data, &adapter->csr.csr_address[offset]);
65}
66
67#define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset)
68
69static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
70{
71 u32 data;
72
73 data = lan743x_csr_read(adapter, HW_CFG);
74 data |= HW_CFG_LRST_;
75 lan743x_csr_write(adapter, HW_CFG, data);
76
77 return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
78 !(data & HW_CFG_LRST_), 100000, 10000000);
79}
80
81static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
82 int offset, u32 bit_mask,
83 int target_value, int usleep_min,
84 int usleep_max, int count)
85{
86 u32 data;
87
88 return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
89 target_value == ((data & bit_mask) ? 1 : 0),
90 usleep_max, usleep_min * count);
91}
92
93static int lan743x_csr_init(struct lan743x_adapter *adapter)
94{
95 struct lan743x_csr *csr = &adapter->csr;
96 resource_size_t bar_start, bar_length;
97 int result;
98
99 bar_start = pci_resource_start(adapter->pdev, 0);
100 bar_length = pci_resource_len(adapter->pdev, 0);
101 csr->csr_address = devm_ioremap(&adapter->pdev->dev,
102 bar_start, bar_length);
103 if (!csr->csr_address) {
104 result = -ENOMEM;
105 goto clean_up;
106 }
107
108 csr->id_rev = lan743x_csr_read(adapter, ID_REV);
109 csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
110 netif_info(adapter, probe, adapter->netdev,
111 "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
112 csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
113 FPGA_REV_GET_MINOR_(csr->fpga_rev));
114 if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
115 result = -ENODEV;
116 goto clean_up;
117 }
118
119 csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
120 switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
121 case ID_REV_CHIP_REV_A0_:
122 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
123 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
124 break;
125 case ID_REV_CHIP_REV_B0_:
126 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
127 break;
128 }
129
130 result = lan743x_csr_light_reset(adapter);
131 if (result)
132 goto clean_up;
133 return 0;
134clean_up:
135 return result;
136}
137
138static void lan743x_intr_software_isr(void *context)
139{
140 struct lan743x_adapter *adapter = context;
141 struct lan743x_intr *intr = &adapter->intr;
142 u32 int_sts;
143
144 int_sts = lan743x_csr_read(adapter, INT_STS);
145 if (int_sts & INT_BIT_SW_GP_) {
146 lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
147 intr->software_isr_flag = 1;
148 }
149}
150
151static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
152{
153 struct lan743x_tx *tx = context;
154 struct lan743x_adapter *adapter = tx->adapter;
155 bool enable_flag = true;
156 u32 int_en = 0;
157
158 int_en = lan743x_csr_read(adapter, INT_EN_SET);
159 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
160 lan743x_csr_write(adapter, INT_EN_CLR,
161 INT_BIT_DMA_TX_(tx->channel_number));
162 }
163
164 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
165 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
166 u32 dmac_int_sts;
167 u32 dmac_int_en;
168
169 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
170 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
171 else
172 dmac_int_sts = ioc_bit;
173 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
174 dmac_int_en = lan743x_csr_read(adapter,
175 DMAC_INT_EN_SET);
176 else
177 dmac_int_en = ioc_bit;
178
179 dmac_int_en &= ioc_bit;
180 dmac_int_sts &= dmac_int_en;
181 if (dmac_int_sts & ioc_bit) {
182 napi_schedule(&tx->napi);
183 enable_flag = false;/* poll func will enable later */
184 }
185 }
186
187 if (enable_flag)
188 /* enable isr */
189 lan743x_csr_write(adapter, INT_EN_SET,
190 INT_BIT_DMA_TX_(tx->channel_number));
191}
192
193static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
194{
195 struct lan743x_rx *rx = context;
196 struct lan743x_adapter *adapter = rx->adapter;
197 bool enable_flag = true;
198
199 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
200 lan743x_csr_write(adapter, INT_EN_CLR,
201 INT_BIT_DMA_RX_(rx->channel_number));
202 }
203
204 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
205 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
206 u32 dmac_int_sts;
207 u32 dmac_int_en;
208
209 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
210 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
211 else
212 dmac_int_sts = rx_frame_bit;
213 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
214 dmac_int_en = lan743x_csr_read(adapter,
215 DMAC_INT_EN_SET);
216 else
217 dmac_int_en = rx_frame_bit;
218
219 dmac_int_en &= rx_frame_bit;
220 dmac_int_sts &= dmac_int_en;
221 if (dmac_int_sts & rx_frame_bit) {
222 napi_schedule(&rx->napi);
223 enable_flag = false;/* poll funct will enable later */
224 }
225 }
226
227 if (enable_flag) {
228 /* enable isr */
229 lan743x_csr_write(adapter, INT_EN_SET,
230 INT_BIT_DMA_RX_(rx->channel_number));
231 }
232}
233
234static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
235{
236 struct lan743x_adapter *adapter = context;
237 unsigned int channel;
238
239 if (int_sts & INT_BIT_ALL_RX_) {
240 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
241 channel++) {
242 u32 int_bit = INT_BIT_DMA_RX_(channel);
243
244 if (int_sts & int_bit) {
245 lan743x_rx_isr(&adapter->rx[channel],
246 int_bit, flags);
247 int_sts &= ~int_bit;
248 }
249 }
250 }
251 if (int_sts & INT_BIT_ALL_TX_) {
252 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
253 channel++) {
254 u32 int_bit = INT_BIT_DMA_TX_(channel);
255
256 if (int_sts & int_bit) {
257 lan743x_tx_isr(&adapter->tx[channel],
258 int_bit, flags);
259 int_sts &= ~int_bit;
260 }
261 }
262 }
263 if (int_sts & INT_BIT_ALL_OTHER_) {
264 if (int_sts & INT_BIT_SW_GP_) {
265 lan743x_intr_software_isr(adapter);
266 int_sts &= ~INT_BIT_SW_GP_;
267 }
268 }
269 if (int_sts)
270 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
271}
272
273static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
274{
275 struct lan743x_vector *vector = ptr;
276 struct lan743x_adapter *adapter = vector->adapter;
277 irqreturn_t result = IRQ_NONE;
278 u32 int_enables;
279 u32 int_sts;
280
281 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
282 int_sts = lan743x_csr_read(adapter, INT_STS);
283 } else if (vector->flags &
284 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
285 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
286 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
287 } else {
288 /* use mask as implied status */
289 int_sts = vector->int_mask | INT_BIT_MAS_;
290 }
291
292 if (!(int_sts & INT_BIT_MAS_))
293 goto irq_done;
294
295 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
296 /* disable vector interrupt */
297 lan743x_csr_write(adapter,
298 INT_VEC_EN_CLR,
299 INT_VEC_EN_(vector->vector_index));
300
301 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
302 /* disable master interrupt */
303 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
304
305 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
306 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
307 } else {
308 /* use vector mask as implied enable mask */
309 int_enables = vector->int_mask;
310 }
311
312 int_sts &= int_enables;
313 int_sts &= vector->int_mask;
314 if (int_sts) {
315 if (vector->handler) {
316 vector->handler(vector->context,
317 int_sts, vector->flags);
318 } else {
319 /* disable interrupts on this vector */
320 lan743x_csr_write(adapter, INT_EN_CLR,
321 vector->int_mask);
322 }
323 result = IRQ_HANDLED;
324 }
325
326 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
327 /* enable master interrupt */
328 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
329
330 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
331 /* enable vector interrupt */
332 lan743x_csr_write(adapter,
333 INT_VEC_EN_SET,
334 INT_VEC_EN_(vector->vector_index));
335irq_done:
336 return result;
337}
338
339static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
340{
341 struct lan743x_intr *intr = &adapter->intr;
342 int result = -ENODEV;
343 int timeout = 10;
344
345 intr->software_isr_flag = 0;
346
347 /* enable interrupt */
348 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
349
350 /* activate interrupt here */
351 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
352 while ((timeout > 0) && (!(intr->software_isr_flag))) {
353 usleep_range(1000, 20000);
354 timeout--;
355 }
356
357 if (intr->software_isr_flag)
358 result = 0;
359
360 /* disable interrupts */
361 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
362 return result;
363}
364
365static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
366 int vector_index, u32 flags,
367 u32 int_mask,
368 lan743x_vector_handler handler,
369 void *context)
370{
371 struct lan743x_vector *vector = &adapter->intr.vector_list
372 [vector_index];
373 int ret;
374
375 vector->adapter = adapter;
376 vector->flags = flags;
377 vector->vector_index = vector_index;
378 vector->int_mask = int_mask;
379 vector->handler = handler;
380 vector->context = context;
381
382 ret = request_irq(vector->irq,
383 lan743x_intr_entry_isr,
384 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
385 IRQF_SHARED : 0, DRIVER_NAME, vector);
386 if (ret) {
387 vector->handler = NULL;
388 vector->context = NULL;
389 vector->int_mask = 0;
390 vector->flags = 0;
391 }
392 return ret;
393}
394
395static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
396 int vector_index)
397{
398 struct lan743x_vector *vector = &adapter->intr.vector_list
399 [vector_index];
400
401 free_irq(vector->irq, vector);
402 vector->handler = NULL;
403 vector->context = NULL;
404 vector->int_mask = 0;
405 vector->flags = 0;
406}
407
408static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
409 u32 int_mask)
410{
411 int index;
412
413 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
414 if (adapter->intr.vector_list[index].int_mask & int_mask)
415 return adapter->intr.vector_list[index].flags;
416 }
417 return 0;
418}
419
420static void lan743x_intr_close(struct lan743x_adapter *adapter)
421{
422 struct lan743x_intr *intr = &adapter->intr;
423 int index = 0;
424
425 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
426 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
427
428 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
429 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
430 lan743x_intr_unregister_isr(adapter, index);
431 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
432 }
433 }
434
435 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
436 pci_disable_msi(adapter->pdev);
437 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
438 }
439
440 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
441 pci_disable_msix(adapter->pdev);
442 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
443 }
444}
445
446static int lan743x_intr_open(struct lan743x_adapter *adapter)
447{
448 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
449 struct lan743x_intr *intr = &adapter->intr;
450 u32 int_vec_en_auto_clr = 0;
451 u32 int_vec_map0 = 0;
452 u32 int_vec_map1 = 0;
453 int ret = -ENODEV;
454 int index = 0;
455 u32 flags = 0;
456
457 intr->number_of_vectors = 0;
458
459 /* Try to set up MSIX interrupts */
460 memset(&msix_entries[0], 0,
461 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
462 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
463 msix_entries[index].entry = index;
464 ret = pci_enable_msix_range(adapter->pdev,
465 msix_entries, 1,
466 1 + LAN743X_USED_TX_CHANNELS +
467 LAN743X_USED_RX_CHANNELS);
468
469 if (ret > 0) {
470 intr->flags |= INTR_FLAG_MSIX_ENABLED;
471 intr->number_of_vectors = ret;
472 intr->using_vectors = true;
473 for (index = 0; index < intr->number_of_vectors; index++)
474 intr->vector_list[index].irq = msix_entries
475 [index].vector;
476 netif_info(adapter, ifup, adapter->netdev,
477 "using MSIX interrupts, number of vectors = %d\n",
478 intr->number_of_vectors);
479 }
480
481 /* If MSIX failed try to setup using MSI interrupts */
482 if (!intr->number_of_vectors) {
483 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
484 if (!pci_enable_msi(adapter->pdev)) {
485 intr->flags |= INTR_FLAG_MSI_ENABLED;
486 intr->number_of_vectors = 1;
487 intr->using_vectors = true;
488 intr->vector_list[0].irq =
489 adapter->pdev->irq;
490 netif_info(adapter, ifup, adapter->netdev,
491 "using MSI interrupts, number of vectors = %d\n",
492 intr->number_of_vectors);
493 }
494 }
495 }
496
497 /* If MSIX, and MSI failed, setup using legacy interrupt */
498 if (!intr->number_of_vectors) {
499 intr->number_of_vectors = 1;
500 intr->using_vectors = false;
501 intr->vector_list[0].irq = intr->irq;
502 netif_info(adapter, ifup, adapter->netdev,
503 "using legacy interrupts\n");
504 }
505
506 /* At this point we must have at least one irq */
507 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
508
509 /* map all interrupts to vector 0 */
510 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
511 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
512 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
513 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
514 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
515 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
516 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
517
518 if (intr->using_vectors) {
519 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
520 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
521 } else {
522 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
523 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
524 LAN743X_VECTOR_FLAG_IRQ_SHARED;
525 }
526
527 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
528 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
529 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
530 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
531 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
532 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
533 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
534 }
535
536 ret = lan743x_intr_register_isr(adapter, 0, flags,
537 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
538 INT_BIT_ALL_OTHER_,
539 lan743x_intr_shared_isr, adapter);
540 if (ret)
541 goto clean_up;
542 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
543
544 if (intr->using_vectors)
545 lan743x_csr_write(adapter, INT_VEC_EN_SET,
546 INT_VEC_EN_(0));
547
548 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
549 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
550 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
551 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
552 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
553 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
554 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
555 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
556 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
557 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
558 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
559 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
560 }
561
562 /* enable interrupts */
563 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
564 ret = lan743x_intr_test_isr(adapter);
565 if (ret)
566 goto clean_up;
567
568 if (intr->number_of_vectors > 1) {
569 int number_of_tx_vectors = intr->number_of_vectors - 1;
570
571 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
572 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
573 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
574 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
575 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
576 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
577 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
578 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
579
580 if (adapter->csr.flags &
581 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
582 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
583 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
584 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
585 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
586 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
587 }
588
589 for (index = 0; index < number_of_tx_vectors; index++) {
590 u32 int_bit = INT_BIT_DMA_TX_(index);
591 int vector = index + 1;
592
593 /* map TX interrupt to vector */
594 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
595 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
596 if (flags &
597 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
598 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
599 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
600 int_vec_en_auto_clr);
601 }
602
603 /* Remove TX interrupt from shared mask */
604 intr->vector_list[0].int_mask &= ~int_bit;
605 ret = lan743x_intr_register_isr(adapter, vector, flags,
606 int_bit, lan743x_tx_isr,
607 &adapter->tx[index]);
608 if (ret)
609 goto clean_up;
610 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
611 if (!(flags &
612 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
613 lan743x_csr_write(adapter, INT_VEC_EN_SET,
614 INT_VEC_EN_(vector));
615 }
616 }
617 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
618 int number_of_rx_vectors = intr->number_of_vectors -
619 LAN743X_USED_TX_CHANNELS - 1;
620
621 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
622 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
623
624 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
625 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
626 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
627 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
628 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
629 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
630
631 if (adapter->csr.flags &
632 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
633 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
634 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
635 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
636 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
637 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
638 }
639 for (index = 0; index < number_of_rx_vectors; index++) {
640 int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
641 u32 int_bit = INT_BIT_DMA_RX_(index);
642
643 /* map RX interrupt to vector */
644 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
645 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
646 if (flags &
647 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
648 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
649 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
650 int_vec_en_auto_clr);
651 }
652
653 /* Remove RX interrupt from shared mask */
654 intr->vector_list[0].int_mask &= ~int_bit;
655 ret = lan743x_intr_register_isr(adapter, vector, flags,
656 int_bit, lan743x_rx_isr,
657 &adapter->rx[index]);
658 if (ret)
659 goto clean_up;
660 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
661
662 lan743x_csr_write(adapter, INT_VEC_EN_SET,
663 INT_VEC_EN_(vector));
664 }
665 }
666 return 0;
667
668clean_up:
669 lan743x_intr_close(adapter);
670 return ret;
671}
672
673static int lan743x_dp_write(struct lan743x_adapter *adapter,
674 u32 select, u32 addr, u32 length, u32 *buf)
675{
676 int ret = -EIO;
677 u32 dp_sel;
678 int i;
679
680 mutex_lock(&adapter->dp_lock);
681 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
682 1, 40, 100, 100))
683 goto unlock;
684 dp_sel = lan743x_csr_read(adapter, DP_SEL);
685 dp_sel &= ~DP_SEL_MASK_;
686 dp_sel |= select;
687 lan743x_csr_write(adapter, DP_SEL, dp_sel);
688
689 for (i = 0; i < length; i++) {
690 lan743x_csr_write(adapter, DP_ADDR, addr + i);
691 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
692 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
693 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
694 1, 40, 100, 100))
695 goto unlock;
696 }
697 ret = 0;
698
699unlock:
700 mutex_unlock(&adapter->dp_lock);
701 return ret;
702}
703
704static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
705{
706 u32 ret;
707
708 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
709 MAC_MII_ACC_PHY_ADDR_MASK_;
710 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
711 MAC_MII_ACC_MIIRINDA_MASK_;
712
713 if (read)
714 ret |= MAC_MII_ACC_MII_READ_;
715 else
716 ret |= MAC_MII_ACC_MII_WRITE_;
717 ret |= MAC_MII_ACC_MII_BUSY_;
718
719 return ret;
720}
721
722static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
723{
724 u32 data;
725
726 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
727 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
728}
729
730static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
731{
732 struct lan743x_adapter *adapter = bus->priv;
733 u32 val, mii_access;
734 int ret;
735
736 /* comfirm MII not busy */
737 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
738 if (ret < 0)
739 return ret;
740
741 /* set the address, index & direction (read from PHY) */
742 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
743 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
744 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
745 if (ret < 0)
746 return ret;
747
748 val = lan743x_csr_read(adapter, MAC_MII_DATA);
749 return (int)(val & 0xFFFF);
750}
751
752static int lan743x_mdiobus_write(struct mii_bus *bus,
753 int phy_id, int index, u16 regval)
754{
755 struct lan743x_adapter *adapter = bus->priv;
756 u32 val, mii_access;
757 int ret;
758
759 /* confirm MII not busy */
760 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
761 if (ret < 0)
762 return ret;
763 val = (u32)regval;
764 lan743x_csr_write(adapter, MAC_MII_DATA, val);
765
766 /* set the address, index & direction (write to PHY) */
767 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
768 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
769 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
770 return ret;
771}
772
773static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
774 u8 *addr)
775{
776 u32 addr_lo, addr_hi;
777
778 addr_lo = addr[0] |
779 addr[1] << 8 |
780 addr[2] << 16 |
781 addr[3] << 24;
782 addr_hi = addr[4] |
783 addr[5] << 8;
784 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
785 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
786
787 ether_addr_copy(adapter->mac_address, addr);
788 netif_info(adapter, drv, adapter->netdev,
789 "MAC address set to %pM\n", addr);
790}
791
792static int lan743x_mac_init(struct lan743x_adapter *adapter)
793{
794 bool mac_address_valid = true;
795 struct net_device *netdev;
796 u32 mac_addr_hi = 0;
797 u32 mac_addr_lo = 0;
798 u32 data;
799 int ret;
800
801 netdev = adapter->netdev;
802 lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
803 ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
804 0, 1000, 20000, 100);
805 if (ret)
806 return ret;
807
808 /* setup auto duplex, and speed detection */
809 data = lan743x_csr_read(adapter, MAC_CR);
810 data |= MAC_CR_ADD_ | MAC_CR_ASD_;
811 data |= MAC_CR_CNTR_RST_;
812 lan743x_csr_write(adapter, MAC_CR, data);
813
814 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
815 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
816 adapter->mac_address[0] = mac_addr_lo & 0xFF;
817 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
818 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
819 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
820 adapter->mac_address[4] = mac_addr_hi & 0xFF;
821 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
822
823 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
824 mac_addr_lo == 0xFFFFFFFF) {
825 mac_address_valid = false;
826 } else if (!is_valid_ether_addr(adapter->mac_address)) {
827 mac_address_valid = false;
828 }
829
830 if (!mac_address_valid)
831 random_ether_addr(adapter->mac_address);
832 lan743x_mac_set_address(adapter, adapter->mac_address);
833 ether_addr_copy(netdev->dev_addr, adapter->mac_address);
834 return 0;
835}
836
837static int lan743x_mac_open(struct lan743x_adapter *adapter)
838{
839 int ret = 0;
840 u32 temp;
841
842 temp = lan743x_csr_read(adapter, MAC_RX);
843 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
844 temp = lan743x_csr_read(adapter, MAC_TX);
845 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
846 return ret;
847}
848
849static void lan743x_mac_close(struct lan743x_adapter *adapter)
850{
851 u32 temp;
852
853 temp = lan743x_csr_read(adapter, MAC_TX);
854 temp &= ~MAC_TX_TXEN_;
855 lan743x_csr_write(adapter, MAC_TX, temp);
856 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
857 1, 1000, 20000, 100);
858
859 temp = lan743x_csr_read(adapter, MAC_RX);
860 temp &= ~MAC_RX_RXEN_;
861 lan743x_csr_write(adapter, MAC_RX, temp);
862 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
863 1, 1000, 20000, 100);
864}
865
866static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
867 bool tx_enable, bool rx_enable)
868{
869 u32 flow_setting = 0;
870
871 /* set maximum pause time because when fifo space frees
872 * up a zero value pause frame will be sent to release the pause
873 */
874 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
875 if (tx_enable)
876 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
877 if (rx_enable)
878 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
879 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
880}
881
882static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
883{
884 int enabled = 0;
885 u32 mac_rx = 0;
886
887 mac_rx = lan743x_csr_read(adapter, MAC_RX);
888 if (mac_rx & MAC_RX_RXEN_) {
889 enabled = 1;
890 if (mac_rx & MAC_RX_RXD_) {
891 lan743x_csr_write(adapter, MAC_RX, mac_rx);
892 mac_rx &= ~MAC_RX_RXD_;
893 }
894 mac_rx &= ~MAC_RX_RXEN_;
895 lan743x_csr_write(adapter, MAC_RX, mac_rx);
896 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
897 1, 1000, 20000, 100);
898 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
899 }
900
901 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
902 mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
903 MAC_RX_MAX_SIZE_MASK_);
904 lan743x_csr_write(adapter, MAC_RX, mac_rx);
905
906 if (enabled) {
907 mac_rx |= MAC_RX_RXEN_;
908 lan743x_csr_write(adapter, MAC_RX, mac_rx);
909 }
910 return 0;
911}
912
913/* PHY */
914static int lan743x_phy_reset(struct lan743x_adapter *adapter)
915{
916 u32 data;
917
918 /* Only called with in probe, and before mdiobus_register */
919
920 data = lan743x_csr_read(adapter, PMT_CTL);
921 data |= PMT_CTL_ETH_PHY_RST_;
922 lan743x_csr_write(adapter, PMT_CTL, data);
923
924 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
925 (!(data & PMT_CTL_ETH_PHY_RST_) &&
926 (data & PMT_CTL_READY_)),
927 50000, 1000000);
928}
929
930static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
931 u8 duplex, u16 local_adv,
932 u16 remote_adv)
933{
934 struct lan743x_phy *phy = &adapter->phy;
935 u8 cap;
936
937 if (phy->fc_autoneg)
938 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
939 else
940 cap = phy->fc_request_control;
941
942 lan743x_mac_flow_ctrl_set_enables(adapter,
943 cap & FLOW_CTRL_TX,
944 cap & FLOW_CTRL_RX);
945}
946
947static int lan743x_phy_init(struct lan743x_adapter *adapter)
948{
949 return lan743x_phy_reset(adapter);
950}
951
952static void lan743x_phy_link_status_change(struct net_device *netdev)
953{
954 struct lan743x_adapter *adapter = netdev_priv(netdev);
955 struct phy_device *phydev = netdev->phydev;
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 memset(&ksettings, 0, sizeof(ksettings));
964 phy_ethtool_get_link_ksettings(netdev, &ksettings);
965 local_advertisement = phy_read(phydev, MII_ADVERTISE);
966 if (local_advertisement < 0)
967 return;
968
969 remote_advertisement = phy_read(phydev, MII_LPA);
970 if (remote_advertisement < 0)
971 return;
972
973 lan743x_phy_update_flowcontrol(adapter,
974 ksettings.base.duplex,
975 local_advertisement,
976 remote_advertisement);
977 }
978}
979
980static void lan743x_phy_close(struct lan743x_adapter *adapter)
981{
982 struct net_device *netdev = adapter->netdev;
983
984 phy_stop(netdev->phydev);
985 phy_disconnect(netdev->phydev);
986 netdev->phydev = NULL;
987}
988
989static int lan743x_phy_open(struct lan743x_adapter *adapter)
990{
991 struct lan743x_phy *phy = &adapter->phy;
992 struct phy_device *phydev;
993 struct net_device *netdev;
994 int ret = -EIO;
995 u32 mii_adv;
996
997 netdev = adapter->netdev;
998 phydev = phy_find_first(adapter->mdiobus);
999 if (!phydev)
1000 goto return_error;
1001
1002 ret = phy_connect_direct(netdev, phydev,
1003 lan743x_phy_link_status_change,
1004 PHY_INTERFACE_MODE_GMII);
1005 if (ret)
1006 goto return_error;
1007
1008 /* MAC doesn't support 1000T Half */
1009 phydev->supported &= ~SUPPORTED_1000baseT_Half;
1010
1011 /* support both flow controls */
1012 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1013 phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1014 mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
1015 phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
1016 phy->fc_autoneg = phydev->autoneg;
1017
1018 phy_start(phydev);
1019 phy_start_aneg(phydev);
1020 return 0;
1021
1022return_error:
1023 return ret;
1024}
1025
1026static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1027{
1028 u8 *mac_addr;
1029 u32 mac_addr_hi = 0;
1030 u32 mac_addr_lo = 0;
1031
1032 /* Add mac address to perfect Filter */
1033 mac_addr = adapter->mac_address;
1034 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1035 (((u32)(mac_addr[1])) << 8) |
1036 (((u32)(mac_addr[2])) << 16) |
1037 (((u32)(mac_addr[3])) << 24));
1038 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1039 (((u32)(mac_addr[5])) << 8));
1040
1041 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1042 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1043 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1044}
1045
1046static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1047{
1048 struct net_device *netdev = adapter->netdev;
1049 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1050 u32 rfctl;
1051 u32 data;
1052
1053 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1054 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1055 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1056 rfctl |= RFE_CTL_AB_;
1057 if (netdev->flags & IFF_PROMISC) {
1058 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1059 } else {
1060 if (netdev->flags & IFF_ALLMULTI)
1061 rfctl |= RFE_CTL_AM_;
1062 }
1063
1064 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1065 if (netdev_mc_count(netdev)) {
1066 struct netdev_hw_addr *ha;
1067 int i;
1068
1069 rfctl |= RFE_CTL_DA_PERFECT_;
1070 i = 1;
1071 netdev_for_each_mc_addr(ha, netdev) {
1072 /* set first 32 into Perfect Filter */
1073 if (i < 33) {
1074 lan743x_csr_write(adapter,
1075 RFE_ADDR_FILT_HI(i), 0);
1076 data = ha->addr[3];
1077 data = ha->addr[2] | (data << 8);
1078 data = ha->addr[1] | (data << 8);
1079 data = ha->addr[0] | (data << 8);
1080 lan743x_csr_write(adapter,
1081 RFE_ADDR_FILT_LO(i), data);
1082 data = ha->addr[5];
1083 data = ha->addr[4] | (data << 8);
1084 data |= RFE_ADDR_FILT_HI_VALID_;
1085 lan743x_csr_write(adapter,
1086 RFE_ADDR_FILT_HI(i), data);
1087 } else {
1088 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1089 23) & 0x1FF;
1090 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1091 rfctl |= RFE_CTL_MCAST_HASH_;
1092 }
1093 i++;
1094 }
1095 }
1096
1097 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1098 DP_SEL_VHF_VLAN_LEN,
1099 DP_SEL_VHF_HASH_LEN, hash_table);
1100 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1101}
1102
1103static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1104{
1105 u32 data = 0;
1106
1107 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1108 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1109 0, 1000, 20000, 100);
1110 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1111 case DMA_DESCRIPTOR_SPACING_16:
1112 data = DMAC_CFG_MAX_DSPACE_16_;
1113 break;
1114 case DMA_DESCRIPTOR_SPACING_32:
1115 data = DMAC_CFG_MAX_DSPACE_32_;
1116 break;
1117 case DMA_DESCRIPTOR_SPACING_64:
1118 data = DMAC_CFG_MAX_DSPACE_64_;
1119 break;
1120 case DMA_DESCRIPTOR_SPACING_128:
1121 data = DMAC_CFG_MAX_DSPACE_128_;
1122 break;
1123 default:
1124 return -EPERM;
1125 }
1126 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1127 data |= DMAC_CFG_COAL_EN_;
1128 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1129 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1130 lan743x_csr_write(adapter, DMAC_CFG, data);
1131 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1132 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1133 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1134 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1135 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1136 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1137 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1138 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1139 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1140 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1141 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1142 return 0;
1143}
1144
1145static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1146 int tx_channel)
1147{
1148 u32 dmac_cmd = 0;
1149
1150 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1151 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1152 DMAC_CMD_START_T_(tx_channel)),
1153 (dmac_cmd &
1154 DMAC_CMD_STOP_T_(tx_channel)));
1155}
1156
1157static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1158 int tx_channel)
1159{
1160 int timeout = 100;
1161 int result = 0;
1162
1163 while (timeout &&
1164 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1165 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1166 usleep_range(1000, 20000);
1167 timeout--;
1168 }
1169 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1170 result = -ENODEV;
1171 return result;
1172}
1173
1174static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1175 int rx_channel)
1176{
1177 u32 dmac_cmd = 0;
1178
1179 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1180 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1181 DMAC_CMD_START_R_(rx_channel)),
1182 (dmac_cmd &
1183 DMAC_CMD_STOP_R_(rx_channel)));
1184}
1185
1186static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1187 int rx_channel)
1188{
1189 int timeout = 100;
1190 int result = 0;
1191
1192 while (timeout &&
1193 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1194 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1195 usleep_range(1000, 20000);
1196 timeout--;
1197 }
1198 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1199 result = -ENODEV;
1200 return result;
1201}
1202
1203static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1204 int descriptor_index, bool cleanup)
1205{
1206 struct lan743x_tx_buffer_info *buffer_info = NULL;
1207 struct lan743x_tx_descriptor *descriptor = NULL;
1208 u32 descriptor_type = 0;
1209
1210 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1211 buffer_info = &tx->buffer_info[descriptor_index];
1212 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1213 goto done;
1214
1215 descriptor_type = (descriptor->data0) &
1216 TX_DESC_DATA0_DTYPE_MASK_;
1217 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1218 goto clean_up_data_descriptor;
1219 else
1220 goto clear_active;
1221
1222clean_up_data_descriptor:
1223 if (buffer_info->dma_ptr) {
1224 if (buffer_info->flags &
1225 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1226 dma_unmap_page(&tx->adapter->pdev->dev,
1227 buffer_info->dma_ptr,
1228 buffer_info->buffer_length,
1229 DMA_TO_DEVICE);
1230 } else {
1231 dma_unmap_single(&tx->adapter->pdev->dev,
1232 buffer_info->dma_ptr,
1233 buffer_info->buffer_length,
1234 DMA_TO_DEVICE);
1235 }
1236 buffer_info->dma_ptr = 0;
1237 buffer_info->buffer_length = 0;
1238 }
1239 if (buffer_info->skb) {
1240 dev_kfree_skb(buffer_info->skb);
1241 buffer_info->skb = NULL;
1242 }
1243
1244clear_active:
1245 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1246
1247done:
1248 memset(buffer_info, 0, sizeof(*buffer_info));
1249 memset(descriptor, 0, sizeof(*descriptor));
1250}
1251
1252static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1253{
1254 return ((++index) % tx->ring_size);
1255}
1256
1257static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1258{
1259 while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1260 lan743x_tx_release_desc(tx, tx->last_head, false);
1261 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1262 }
1263}
1264
1265static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1266{
1267 u32 original_head = 0;
1268
1269 original_head = tx->last_head;
1270 do {
1271 lan743x_tx_release_desc(tx, tx->last_head, true);
1272 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1273 } while (tx->last_head != original_head);
1274 memset(tx->ring_cpu_ptr, 0,
1275 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1276 memset(tx->buffer_info, 0,
1277 sizeof(*tx->buffer_info) * (tx->ring_size));
1278}
1279
1280static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1281 struct sk_buff *skb)
1282{
1283 int result = 1; /* 1 for the main skb buffer */
1284 int nr_frags = 0;
1285
1286 if (skb_is_gso(skb))
1287 result++; /* requires an extension descriptor */
1288 nr_frags = skb_shinfo(skb)->nr_frags;
1289 result += nr_frags; /* 1 for each fragment buffer */
1290 return result;
1291}
1292
1293static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1294{
1295 int last_head = tx->last_head;
1296 int last_tail = tx->last_tail;
1297
1298 if (last_tail >= last_head)
1299 return tx->ring_size - last_tail + last_head - 1;
1300 else
1301 return last_head - last_tail - 1;
1302}
1303
1304static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1305 unsigned char *first_buffer,
1306 unsigned int first_buffer_length,
1307 unsigned int frame_length,
1308 bool check_sum)
1309{
1310 /* called only from within lan743x_tx_xmit_frame.
1311 * assuming tx->ring_lock has already been acquired.
1312 */
1313 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1314 struct lan743x_tx_buffer_info *buffer_info = NULL;
1315 struct lan743x_adapter *adapter = tx->adapter;
1316 struct device *dev = &adapter->pdev->dev;
1317 dma_addr_t dma_ptr;
1318
1319 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1320 tx->frame_first = tx->last_tail;
1321 tx->frame_tail = tx->frame_first;
1322
1323 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1324 buffer_info = &tx->buffer_info[tx->frame_tail];
1325 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1326 DMA_TO_DEVICE);
1327 if (dma_mapping_error(dev, dma_ptr))
1328 return -ENOMEM;
1329
1330 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1331 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1332 tx_descriptor->data3 = (frame_length << 16) &
1333 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1334
1335 buffer_info->skb = NULL;
1336 buffer_info->dma_ptr = dma_ptr;
1337 buffer_info->buffer_length = first_buffer_length;
1338 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1339
1340 tx->frame_data0 = (first_buffer_length &
1341 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1342 TX_DESC_DATA0_DTYPE_DATA_ |
1343 TX_DESC_DATA0_FS_ |
1344 TX_DESC_DATA0_FCS_;
1345
1346 if (check_sum)
1347 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1348 TX_DESC_DATA0_IPE_ |
1349 TX_DESC_DATA0_TPE_;
1350
1351 /* data0 will be programmed in one of other frame assembler functions */
1352 return 0;
1353}
1354
1355static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1356 unsigned int frame_length)
1357{
1358 /* called only from within lan743x_tx_xmit_frame.
1359 * assuming tx->ring_lock has already been acquired.
1360 */
1361 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1362 struct lan743x_tx_buffer_info *buffer_info = NULL;
1363
1364 /* wrap up previous descriptor */
1365 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1366 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1367 tx_descriptor->data0 = tx->frame_data0;
1368
1369 /* move to next descriptor */
1370 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1371 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1372 buffer_info = &tx->buffer_info[tx->frame_tail];
1373
1374 /* add extension descriptor */
1375 tx_descriptor->data1 = 0;
1376 tx_descriptor->data2 = 0;
1377 tx_descriptor->data3 = 0;
1378
1379 buffer_info->skb = NULL;
1380 buffer_info->dma_ptr = 0;
1381 buffer_info->buffer_length = 0;
1382 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1383
1384 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1385 TX_DESC_DATA0_DTYPE_EXT_ |
1386 TX_DESC_DATA0_EXT_LSO_;
1387
1388 /* data0 will be programmed in one of other frame assembler functions */
1389}
1390
1391static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1392 const struct skb_frag_struct *fragment,
1393 unsigned int frame_length)
1394{
1395 /* called only from within lan743x_tx_xmit_frame
1396 * assuming tx->ring_lock has already been acquired
1397 */
1398 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1399 struct lan743x_tx_buffer_info *buffer_info = NULL;
1400 struct lan743x_adapter *adapter = tx->adapter;
1401 struct device *dev = &adapter->pdev->dev;
1402 unsigned int fragment_length = 0;
1403 dma_addr_t dma_ptr;
1404
1405 fragment_length = skb_frag_size(fragment);
1406 if (!fragment_length)
1407 return 0;
1408
1409 /* wrap up previous descriptor */
1410 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1411 tx_descriptor->data0 = tx->frame_data0;
1412
1413 /* move to next descriptor */
1414 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1415 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1416 buffer_info = &tx->buffer_info[tx->frame_tail];
1417 dma_ptr = skb_frag_dma_map(dev, fragment,
1418 0, fragment_length,
1419 DMA_TO_DEVICE);
1420 if (dma_mapping_error(dev, dma_ptr)) {
1421 int desc_index;
1422
1423 /* cleanup all previously setup descriptors */
1424 desc_index = tx->frame_first;
1425 while (desc_index != tx->frame_tail) {
1426 lan743x_tx_release_desc(tx, desc_index, true);
1427 desc_index = lan743x_tx_next_index(tx, desc_index);
1428 }
1429 dma_wmb();
1430 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1431 tx->frame_first = 0;
1432 tx->frame_data0 = 0;
1433 tx->frame_tail = 0;
1434 return -ENOMEM;
1435 }
1436
1437 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1438 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1439 tx_descriptor->data3 = (frame_length << 16) &
1440 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1441
1442 buffer_info->skb = NULL;
1443 buffer_info->dma_ptr = dma_ptr;
1444 buffer_info->buffer_length = fragment_length;
1445 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1446 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1447
1448 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1449 TX_DESC_DATA0_DTYPE_DATA_ |
1450 TX_DESC_DATA0_FCS_;
1451
1452 /* data0 will be programmed in one of other frame assembler functions */
1453 return 0;
1454}
1455
1456static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1457 struct sk_buff *skb,
1458 bool ignore_sync)
1459{
1460 /* called only from within lan743x_tx_xmit_frame
1461 * assuming tx->ring_lock has already been acquired
1462 */
1463 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1464 struct lan743x_tx_buffer_info *buffer_info = NULL;
1465 struct lan743x_adapter *adapter = tx->adapter;
1466 u32 tx_tail_flags = 0;
1467
1468 /* wrap up previous descriptor */
1469 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1470 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1471
1472 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1473 buffer_info = &tx->buffer_info[tx->frame_tail];
1474 buffer_info->skb = skb;
1475 if (ignore_sync)
1476 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1477
1478 tx_descriptor->data0 = tx->frame_data0;
1479 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1480 tx->last_tail = tx->frame_tail;
1481
1482 dma_wmb();
1483
1484 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1485 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1486 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1487 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1488 TX_TAIL_SET_TOP_INT_EN_;
1489
1490 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1491 tx_tail_flags | tx->frame_tail);
1492 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1493}
1494
1495static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1496 struct sk_buff *skb)
1497{
1498 int required_number_of_descriptors = 0;
1499 unsigned int start_frame_length = 0;
1500 unsigned int frame_length = 0;
1501 unsigned int head_length = 0;
1502 unsigned long irq_flags = 0;
1503 bool ignore_sync = false;
1504 int nr_frags = 0;
1505 bool gso = false;
1506 int j;
1507
1508 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1509
1510 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1511 if (required_number_of_descriptors >
1512 lan743x_tx_get_avail_desc(tx)) {
1513 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1514 dev_kfree_skb(skb);
1515 } else {
1516 /* save to overflow buffer */
1517 tx->overflow_skb = skb;
1518 netif_stop_queue(tx->adapter->netdev);
1519 }
1520 goto unlock;
1521 }
1522
1523 /* space available, transmit skb */
1524 head_length = skb_headlen(skb);
1525 frame_length = skb_pagelen(skb);
1526 nr_frags = skb_shinfo(skb)->nr_frags;
1527 start_frame_length = frame_length;
1528 gso = skb_is_gso(skb);
1529 if (gso) {
1530 start_frame_length = max(skb_shinfo(skb)->gso_size,
1531 (unsigned short)8);
1532 }
1533
1534 if (lan743x_tx_frame_start(tx,
1535 skb->data, head_length,
1536 start_frame_length,
1537 skb->ip_summed == CHECKSUM_PARTIAL)) {
1538 dev_kfree_skb(skb);
1539 goto unlock;
1540 }
1541
1542 if (gso)
1543 lan743x_tx_frame_add_lso(tx, frame_length);
1544
1545 if (nr_frags <= 0)
1546 goto finish;
1547
1548 for (j = 0; j < nr_frags; j++) {
1549 const struct skb_frag_struct *frag;
1550
1551 frag = &(skb_shinfo(skb)->frags[j]);
1552 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1553 /* upon error no need to call
1554 * lan743x_tx_frame_end
1555 * frame assembler clean up was performed inside
1556 * lan743x_tx_frame_add_fragment
1557 */
1558 dev_kfree_skb(skb);
1559 goto unlock;
1560 }
1561 }
1562
1563finish:
1564 lan743x_tx_frame_end(tx, skb, ignore_sync);
1565
1566unlock:
1567 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1568 return NETDEV_TX_OK;
1569}
1570
1571static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1572{
1573 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1574 struct lan743x_adapter *adapter = tx->adapter;
1575 bool start_transmitter = false;
1576 unsigned long irq_flags = 0;
1577 u32 ioc_bit = 0;
1578 u32 int_sts = 0;
1579
1580 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1581 int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1582 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1583 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1584 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1585
1586 /* clean up tx ring */
1587 lan743x_tx_release_completed_descriptors(tx);
1588 if (netif_queue_stopped(adapter->netdev)) {
1589 if (tx->overflow_skb) {
1590 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1591 lan743x_tx_get_avail_desc(tx))
1592 start_transmitter = true;
1593 } else {
1594 netif_wake_queue(adapter->netdev);
1595 }
1596 }
1597 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1598
1599 if (start_transmitter) {
1600 /* space is now available, transmit overflow skb */
1601 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1602 tx->overflow_skb = NULL;
1603 netif_wake_queue(adapter->netdev);
1604 }
1605
1606 if (!napi_complete_done(napi, weight))
1607 goto done;
1608
1609 /* enable isr */
1610 lan743x_csr_write(adapter, INT_EN_SET,
1611 INT_BIT_DMA_TX_(tx->channel_number));
1612 lan743x_csr_read(adapter, INT_STS);
1613
1614done:
1615 return weight;
1616}
1617
1618static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1619{
1620 if (tx->head_cpu_ptr) {
1621 pci_free_consistent(tx->adapter->pdev,
1622 sizeof(*tx->head_cpu_ptr),
1623 (void *)(tx->head_cpu_ptr),
1624 tx->head_dma_ptr);
1625 tx->head_cpu_ptr = NULL;
1626 tx->head_dma_ptr = 0;
1627 }
1628 kfree(tx->buffer_info);
1629 tx->buffer_info = NULL;
1630
1631 if (tx->ring_cpu_ptr) {
1632 pci_free_consistent(tx->adapter->pdev,
1633 tx->ring_allocation_size,
1634 tx->ring_cpu_ptr,
1635 tx->ring_dma_ptr);
1636 tx->ring_allocation_size = 0;
1637 tx->ring_cpu_ptr = NULL;
1638 tx->ring_dma_ptr = 0;
1639 }
1640 tx->ring_size = 0;
1641}
1642
1643static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1644{
1645 size_t ring_allocation_size = 0;
1646 void *cpu_ptr = NULL;
1647 dma_addr_t dma_ptr;
1648 int ret = -ENOMEM;
1649
1650 tx->ring_size = LAN743X_TX_RING_SIZE;
1651 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1652 ret = -EINVAL;
1653 goto cleanup;
1654 }
1655 ring_allocation_size = ALIGN(tx->ring_size *
1656 sizeof(struct lan743x_tx_descriptor),
1657 PAGE_SIZE);
1658 dma_ptr = 0;
1659 cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1660 ring_allocation_size, &dma_ptr);
1661 if (!cpu_ptr) {
1662 ret = -ENOMEM;
1663 goto cleanup;
1664 }
1665
1666 tx->ring_allocation_size = ring_allocation_size;
1667 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1668 tx->ring_dma_ptr = dma_ptr;
1669
1670 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1671 if (!cpu_ptr) {
1672 ret = -ENOMEM;
1673 goto cleanup;
1674 }
1675 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1676 dma_ptr = 0;
1677 cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1678 sizeof(*tx->head_cpu_ptr), &dma_ptr);
1679 if (!cpu_ptr) {
1680 ret = -ENOMEM;
1681 goto cleanup;
1682 }
1683
1684 tx->head_cpu_ptr = cpu_ptr;
1685 tx->head_dma_ptr = dma_ptr;
1686 if (tx->head_dma_ptr & 0x3) {
1687 ret = -ENOMEM;
1688 goto cleanup;
1689 }
1690
1691 return 0;
1692
1693cleanup:
1694 lan743x_tx_ring_cleanup(tx);
1695 return ret;
1696}
1697
1698static void lan743x_tx_close(struct lan743x_tx *tx)
1699{
1700 struct lan743x_adapter *adapter = tx->adapter;
1701
1702 lan743x_csr_write(adapter,
1703 DMAC_CMD,
1704 DMAC_CMD_STOP_T_(tx->channel_number));
1705 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1706
1707 lan743x_csr_write(adapter,
1708 DMAC_INT_EN_CLR,
1709 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1710 lan743x_csr_write(adapter, INT_EN_CLR,
1711 INT_BIT_DMA_TX_(tx->channel_number));
1712 napi_disable(&tx->napi);
1713 netif_napi_del(&tx->napi);
1714
1715 lan743x_csr_write(adapter, FCT_TX_CTL,
1716 FCT_TX_CTL_DIS_(tx->channel_number));
1717 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1718 FCT_TX_CTL_EN_(tx->channel_number),
1719 0, 1000, 20000, 100);
1720
1721 lan743x_tx_release_all_descriptors(tx);
1722
1723 if (tx->overflow_skb) {
1724 dev_kfree_skb(tx->overflow_skb);
1725 tx->overflow_skb = NULL;
1726 }
1727
1728 lan743x_tx_ring_cleanup(tx);
1729}
1730
1731static int lan743x_tx_open(struct lan743x_tx *tx)
1732{
1733 struct lan743x_adapter *adapter = NULL;
1734 u32 data = 0;
1735 int ret;
1736
1737 adapter = tx->adapter;
1738 ret = lan743x_tx_ring_init(tx);
1739 if (ret)
1740 return ret;
1741
1742 /* initialize fifo */
1743 lan743x_csr_write(adapter, FCT_TX_CTL,
1744 FCT_TX_CTL_RESET_(tx->channel_number));
1745 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1746 FCT_TX_CTL_RESET_(tx->channel_number),
1747 0, 1000, 20000, 100);
1748
1749 /* enable fifo */
1750 lan743x_csr_write(adapter, FCT_TX_CTL,
1751 FCT_TX_CTL_EN_(tx->channel_number));
1752
1753 /* reset tx channel */
1754 lan743x_csr_write(adapter, DMAC_CMD,
1755 DMAC_CMD_TX_SWR_(tx->channel_number));
1756 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1757 DMAC_CMD_TX_SWR_(tx->channel_number),
1758 0, 1000, 20000, 100);
1759
1760 /* Write TX_BASE_ADDR */
1761 lan743x_csr_write(adapter,
1762 TX_BASE_ADDRH(tx->channel_number),
1763 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1764 lan743x_csr_write(adapter,
1765 TX_BASE_ADDRL(tx->channel_number),
1766 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1767
1768 /* Write TX_CFG_B */
1769 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1770 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1771 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1772 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1773 data |= TX_CFG_B_TDMABL_512_;
1774 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1775
1776 /* Write TX_CFG_A */
1777 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1778 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1779 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1780 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1781 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1782 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1783 }
1784 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1785
1786 /* Write TX_HEAD_WRITEBACK_ADDR */
1787 lan743x_csr_write(adapter,
1788 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1789 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1790 lan743x_csr_write(adapter,
1791 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1792 DMA_ADDR_LOW32(tx->head_dma_ptr));
1793
1794 /* set last head */
1795 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1796
1797 /* write TX_TAIL */
1798 tx->last_tail = 0;
1799 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1800 (u32)(tx->last_tail));
1801 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1802 INT_BIT_DMA_TX_
1803 (tx->channel_number));
1804 netif_napi_add(adapter->netdev,
1805 &tx->napi, lan743x_tx_napi_poll,
1806 tx->ring_size - 1);
1807 napi_enable(&tx->napi);
1808
1809 data = 0;
1810 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1811 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1812 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1813 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1814 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1815 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1816 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1817 data |= TX_CFG_C_TX_INT_EN_R2C_;
1818 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1819
1820 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1821 lan743x_csr_write(adapter, INT_EN_SET,
1822 INT_BIT_DMA_TX_(tx->channel_number));
1823 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1824 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1825
1826 /* start dmac channel */
1827 lan743x_csr_write(adapter, DMAC_CMD,
1828 DMAC_CMD_START_T_(tx->channel_number));
1829 return 0;
1830}
1831
1832static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1833{
1834 return ((++index) % rx->ring_size);
1835}
1836
1837static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1838{
1839 struct lan743x_rx_buffer_info *buffer_info;
1840 struct lan743x_rx_descriptor *descriptor;
1841 int length = 0;
1842
1843 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1844 descriptor = &rx->ring_cpu_ptr[index];
1845 buffer_info = &rx->buffer_info[index];
1846 buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1847 length,
1848 GFP_ATOMIC | GFP_DMA);
1849 if (!(buffer_info->skb))
1850 return -ENOMEM;
1851 buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1852 buffer_info->skb->data,
1853 length,
1854 DMA_FROM_DEVICE);
1855 if (dma_mapping_error(&rx->adapter->pdev->dev,
1856 buffer_info->dma_ptr)) {
1857 buffer_info->dma_ptr = 0;
1858 return -ENOMEM;
1859 }
1860
1861 buffer_info->buffer_length = length;
1862 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1863 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1864 descriptor->data3 = 0;
1865 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1866 (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1867 skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1868
1869 return 0;
1870}
1871
1872static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1873{
1874 struct lan743x_rx_buffer_info *buffer_info;
1875 struct lan743x_rx_descriptor *descriptor;
1876
1877 descriptor = &rx->ring_cpu_ptr[index];
1878 buffer_info = &rx->buffer_info[index];
1879
1880 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1881 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1882 descriptor->data3 = 0;
1883 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1884 ((buffer_info->buffer_length) &
1885 RX_DESC_DATA0_BUF_LENGTH_MASK_));
1886}
1887
1888static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1889{
1890 struct lan743x_rx_buffer_info *buffer_info;
1891 struct lan743x_rx_descriptor *descriptor;
1892
1893 descriptor = &rx->ring_cpu_ptr[index];
1894 buffer_info = &rx->buffer_info[index];
1895
1896 memset(descriptor, 0, sizeof(*descriptor));
1897
1898 if (buffer_info->dma_ptr) {
1899 dma_unmap_single(&rx->adapter->pdev->dev,
1900 buffer_info->dma_ptr,
1901 buffer_info->buffer_length,
1902 DMA_FROM_DEVICE);
1903 buffer_info->dma_ptr = 0;
1904 }
1905
1906 if (buffer_info->skb) {
1907 dev_kfree_skb(buffer_info->skb);
1908 buffer_info->skb = NULL;
1909 }
1910
1911 memset(buffer_info, 0, sizeof(*buffer_info));
1912}
1913
1914static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1915{
1916 struct skb_shared_hwtstamps *hwtstamps = NULL;
1917 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1918 struct lan743x_rx_buffer_info *buffer_info;
1919 struct lan743x_rx_descriptor *descriptor;
1920 int current_head_index = -1;
1921 int extension_index = -1;
1922 int first_index = -1;
1923 int last_index = -1;
1924
1925 current_head_index = *rx->head_cpu_ptr;
1926 if (current_head_index < 0 || current_head_index >= rx->ring_size)
1927 goto done;
1928
1929 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
1930 goto done;
1931
1932 if (rx->last_head != current_head_index) {
1933 descriptor = &rx->ring_cpu_ptr[rx->last_head];
1934 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1935 goto done;
1936
1937 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
1938 goto done;
1939
1940 first_index = rx->last_head;
1941 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
1942 last_index = rx->last_head;
1943 } else {
1944 int index;
1945
1946 index = lan743x_rx_next_index(rx, first_index);
1947 while (index != current_head_index) {
1948 descriptor = &rx->ring_cpu_ptr[index];
1949 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
1950 goto done;
1951
1952 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
1953 last_index = index;
1954 break;
1955 }
1956 index = lan743x_rx_next_index(rx, index);
1957 }
1958 }
1959 if (last_index >= 0) {
1960 descriptor = &rx->ring_cpu_ptr[last_index];
1961 if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
1962 /* extension is expected to follow */
1963 int index = lan743x_rx_next_index(rx,
1964 last_index);
1965 if (index != current_head_index) {
1966 descriptor = &rx->ring_cpu_ptr[index];
1967 if (descriptor->data0 &
1968 RX_DESC_DATA0_OWN_) {
1969 goto done;
1970 }
1971 if (descriptor->data0 &
1972 RX_DESC_DATA0_EXT_) {
1973 extension_index = index;
1974 } else {
1975 goto done;
1976 }
1977 } else {
1978 /* extension is not yet available */
1979 /* prevent processing of this packet */
1980 first_index = -1;
1981 last_index = -1;
1982 }
1983 }
1984 }
1985 }
1986 if (first_index >= 0 && last_index >= 0) {
1987 int real_last_index = last_index;
1988 struct sk_buff *skb = NULL;
1989 u32 ts_sec = 0;
1990 u32 ts_nsec = 0;
1991
1992 /* packet is available */
1993 if (first_index == last_index) {
1994 /* single buffer packet */
1995 int packet_length;
1996
1997 buffer_info = &rx->buffer_info[first_index];
1998 skb = buffer_info->skb;
1999 descriptor = &rx->ring_cpu_ptr[first_index];
2000
2001 /* unmap from dma */
2002 if (buffer_info->dma_ptr) {
2003 dma_unmap_single(&rx->adapter->pdev->dev,
2004 buffer_info->dma_ptr,
2005 buffer_info->buffer_length,
2006 DMA_FROM_DEVICE);
2007 buffer_info->dma_ptr = 0;
2008 buffer_info->buffer_length = 0;
2009 }
2010 buffer_info->skb = NULL;
2011 packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2012 (descriptor->data0);
2013 skb_put(skb, packet_length - 4);
2014 skb->protocol = eth_type_trans(skb,
2015 rx->adapter->netdev);
2016 lan743x_rx_allocate_ring_element(rx, first_index);
2017 } else {
2018 int index = first_index;
2019
2020 /* multi buffer packet not supported */
2021 /* this should not happen since
2022 * buffers are allocated to be at least jumbo size
2023 */
2024
2025 /* clean up buffers */
2026 if (first_index <= last_index) {
2027 while ((index >= first_index) &&
2028 (index <= last_index)) {
2029 lan743x_rx_release_ring_element(rx,
2030 index);
2031 lan743x_rx_allocate_ring_element(rx,
2032 index);
2033 index = lan743x_rx_next_index(rx,
2034 index);
2035 }
2036 } else {
2037 while ((index >= first_index) ||
2038 (index <= last_index)) {
2039 lan743x_rx_release_ring_element(rx,
2040 index);
2041 lan743x_rx_allocate_ring_element(rx,
2042 index);
2043 index = lan743x_rx_next_index(rx,
2044 index);
2045 }
2046 }
2047 }
2048
2049 if (extension_index >= 0) {
2050 descriptor = &rx->ring_cpu_ptr[extension_index];
2051 buffer_info = &rx->buffer_info[extension_index];
2052
2053 ts_sec = descriptor->data1;
2054 ts_nsec = (descriptor->data2 &
2055 RX_DESC_DATA2_TS_NS_MASK_);
2056 lan743x_rx_reuse_ring_element(rx, extension_index);
2057 real_last_index = extension_index;
2058 }
2059
2060 if (!skb) {
2061 result = RX_PROCESS_RESULT_PACKET_DROPPED;
2062 goto move_forward;
2063 }
2064
2065 if (extension_index < 0)
2066 goto pass_packet_to_os;
2067 hwtstamps = skb_hwtstamps(skb);
2068 if (hwtstamps)
2069 hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2070
2071pass_packet_to_os:
2072 /* pass packet to OS */
2073 napi_gro_receive(&rx->napi, skb);
2074 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2075
2076move_forward:
2077 /* push tail and head forward */
2078 rx->last_tail = real_last_index;
2079 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2080 }
2081done:
2082 return result;
2083}
2084
2085static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2086{
2087 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2088 struct lan743x_adapter *adapter = rx->adapter;
2089 u32 rx_tail_flags = 0;
2090 int count;
2091
2092 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2093 /* clear int status bit before reading packet */
2094 lan743x_csr_write(adapter, DMAC_INT_STS,
2095 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2096 }
2097 count = 0;
2098 while (count < weight) {
2099 int rx_process_result = -1;
2100
2101 rx_process_result = lan743x_rx_process_packet(rx);
2102 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2103 count++;
2104 } else if (rx_process_result ==
2105 RX_PROCESS_RESULT_NOTHING_TO_DO) {
2106 break;
2107 } else if (rx_process_result ==
2108 RX_PROCESS_RESULT_PACKET_DROPPED) {
2109 continue;
2110 }
2111 }
2112 rx->frame_count += count;
2113 if (count == weight)
2114 goto done;
2115
2116 if (!napi_complete_done(napi, count))
2117 goto done;
2118
2119 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2120 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2121 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2122 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2123 } else {
2124 lan743x_csr_write(adapter, INT_EN_SET,
2125 INT_BIT_DMA_RX_(rx->channel_number));
2126 }
2127
2128 /* update RX_TAIL */
2129 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2130 rx_tail_flags | rx->last_tail);
2131done:
2132 return count;
2133}
2134
2135static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2136{
2137 if (rx->buffer_info && rx->ring_cpu_ptr) {
2138 int index;
2139
2140 for (index = 0; index < rx->ring_size; index++)
2141 lan743x_rx_release_ring_element(rx, index);
2142 }
2143
2144 if (rx->head_cpu_ptr) {
2145 pci_free_consistent(rx->adapter->pdev,
2146 sizeof(*rx->head_cpu_ptr),
2147 rx->head_cpu_ptr,
2148 rx->head_dma_ptr);
2149 rx->head_cpu_ptr = NULL;
2150 rx->head_dma_ptr = 0;
2151 }
2152
2153 kfree(rx->buffer_info);
2154 rx->buffer_info = NULL;
2155
2156 if (rx->ring_cpu_ptr) {
2157 pci_free_consistent(rx->adapter->pdev,
2158 rx->ring_allocation_size,
2159 rx->ring_cpu_ptr,
2160 rx->ring_dma_ptr);
2161 rx->ring_allocation_size = 0;
2162 rx->ring_cpu_ptr = NULL;
2163 rx->ring_dma_ptr = 0;
2164 }
2165
2166 rx->ring_size = 0;
2167 rx->last_head = 0;
2168}
2169
2170static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2171{
2172 size_t ring_allocation_size = 0;
2173 dma_addr_t dma_ptr = 0;
2174 void *cpu_ptr = NULL;
2175 int ret = -ENOMEM;
2176 int index = 0;
2177
2178 rx->ring_size = LAN743X_RX_RING_SIZE;
2179 if (rx->ring_size <= 1) {
2180 ret = -EINVAL;
2181 goto cleanup;
2182 }
2183 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2184 ret = -EINVAL;
2185 goto cleanup;
2186 }
2187 ring_allocation_size = ALIGN(rx->ring_size *
2188 sizeof(struct lan743x_rx_descriptor),
2189 PAGE_SIZE);
2190 dma_ptr = 0;
2191 cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2192 ring_allocation_size, &dma_ptr);
2193 if (!cpu_ptr) {
2194 ret = -ENOMEM;
2195 goto cleanup;
2196 }
2197 rx->ring_allocation_size = ring_allocation_size;
2198 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2199 rx->ring_dma_ptr = dma_ptr;
2200
2201 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2202 GFP_KERNEL);
2203 if (!cpu_ptr) {
2204 ret = -ENOMEM;
2205 goto cleanup;
2206 }
2207 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2208 dma_ptr = 0;
2209 cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2210 sizeof(*rx->head_cpu_ptr), &dma_ptr);
2211 if (!cpu_ptr) {
2212 ret = -ENOMEM;
2213 goto cleanup;
2214 }
2215
2216 rx->head_cpu_ptr = cpu_ptr;
2217 rx->head_dma_ptr = dma_ptr;
2218 if (rx->head_dma_ptr & 0x3) {
2219 ret = -ENOMEM;
2220 goto cleanup;
2221 }
2222
2223 rx->last_head = 0;
2224 for (index = 0; index < rx->ring_size; index++) {
2225 ret = lan743x_rx_allocate_ring_element(rx, index);
2226 if (ret)
2227 goto cleanup;
2228 }
2229 return 0;
2230
2231cleanup:
2232 lan743x_rx_ring_cleanup(rx);
2233 return ret;
2234}
2235
2236static void lan743x_rx_close(struct lan743x_rx *rx)
2237{
2238 struct lan743x_adapter *adapter = rx->adapter;
2239
2240 lan743x_csr_write(adapter, FCT_RX_CTL,
2241 FCT_RX_CTL_DIS_(rx->channel_number));
2242 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2243 FCT_RX_CTL_EN_(rx->channel_number),
2244 0, 1000, 20000, 100);
2245
2246 lan743x_csr_write(adapter, DMAC_CMD,
2247 DMAC_CMD_STOP_R_(rx->channel_number));
2248 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2249
2250 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2251 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2252 lan743x_csr_write(adapter, INT_EN_CLR,
2253 INT_BIT_DMA_RX_(rx->channel_number));
2254 napi_disable(&rx->napi);
2255
2256 netif_napi_del(&rx->napi);
2257
2258 lan743x_rx_ring_cleanup(rx);
2259}
2260
2261static int lan743x_rx_open(struct lan743x_rx *rx)
2262{
2263 struct lan743x_adapter *adapter = rx->adapter;
2264 u32 data = 0;
2265 int ret;
2266
2267 rx->frame_count = 0;
2268 ret = lan743x_rx_ring_init(rx);
2269 if (ret)
2270 goto return_error;
2271
2272 netif_napi_add(adapter->netdev,
2273 &rx->napi, lan743x_rx_napi_poll,
2274 rx->ring_size - 1);
2275
2276 lan743x_csr_write(adapter, DMAC_CMD,
2277 DMAC_CMD_RX_SWR_(rx->channel_number));
2278 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2279 DMAC_CMD_RX_SWR_(rx->channel_number),
2280 0, 1000, 20000, 100);
2281
2282 /* set ring base address */
2283 lan743x_csr_write(adapter,
2284 RX_BASE_ADDRH(rx->channel_number),
2285 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2286 lan743x_csr_write(adapter,
2287 RX_BASE_ADDRL(rx->channel_number),
2288 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2289
2290 /* set rx write back address */
2291 lan743x_csr_write(adapter,
2292 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2293 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2294 lan743x_csr_write(adapter,
2295 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2296 DMA_ADDR_LOW32(rx->head_dma_ptr));
2297 data = RX_CFG_A_RX_HP_WB_EN_;
2298 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2299 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2300 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2301 RX_CFG_A_RX_PF_THRES_SET_(16) |
2302 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2303 }
2304
2305 /* set RX_CFG_A */
2306 lan743x_csr_write(adapter,
2307 RX_CFG_A(rx->channel_number), data);
2308
2309 /* set RX_CFG_B */
2310 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2311 data &= ~RX_CFG_B_RX_PAD_MASK_;
2312 if (!RX_HEAD_PADDING)
2313 data |= RX_CFG_B_RX_PAD_0_;
2314 else
2315 data |= RX_CFG_B_RX_PAD_2_;
2316 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2317 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2318 data |= RX_CFG_B_TS_ALL_RX_;
2319 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2320 data |= RX_CFG_B_RDMABL_512_;
2321
2322 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2323 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2324 INT_BIT_DMA_RX_
2325 (rx->channel_number));
2326
2327 /* set RX_CFG_C */
2328 data = 0;
2329 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2330 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2331 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2332 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2333 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2334 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2335 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2336 data |= RX_CFG_C_RX_INT_EN_R2C_;
2337 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2338
2339 rx->last_tail = ((u32)(rx->ring_size - 1));
2340 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2341 rx->last_tail);
2342 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2343 if (rx->last_head) {
2344 ret = -EIO;
2345 goto napi_delete;
2346 }
2347
2348 napi_enable(&rx->napi);
2349
2350 lan743x_csr_write(adapter, INT_EN_SET,
2351 INT_BIT_DMA_RX_(rx->channel_number));
2352 lan743x_csr_write(adapter, DMAC_INT_STS,
2353 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2354 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2355 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2356 lan743x_csr_write(adapter, DMAC_CMD,
2357 DMAC_CMD_START_R_(rx->channel_number));
2358
2359 /* initialize fifo */
2360 lan743x_csr_write(adapter, FCT_RX_CTL,
2361 FCT_RX_CTL_RESET_(rx->channel_number));
2362 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2363 FCT_RX_CTL_RESET_(rx->channel_number),
2364 0, 1000, 20000, 100);
2365 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2366 FCT_FLOW_CTL_REQ_EN_ |
2367 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2368 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2369
2370 /* enable fifo */
2371 lan743x_csr_write(adapter, FCT_RX_CTL,
2372 FCT_RX_CTL_EN_(rx->channel_number));
2373 return 0;
2374
2375napi_delete:
2376 netif_napi_del(&rx->napi);
2377 lan743x_rx_ring_cleanup(rx);
2378
2379return_error:
2380 return ret;
2381}
2382
2383static int lan743x_netdev_close(struct net_device *netdev)
2384{
2385 struct lan743x_adapter *adapter = netdev_priv(netdev);
2386 int index;
2387
2388 lan743x_tx_close(&adapter->tx[0]);
2389
2390 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2391 lan743x_rx_close(&adapter->rx[index]);
2392
2393 lan743x_phy_close(adapter);
2394
2395 lan743x_mac_close(adapter);
2396
2397 lan743x_intr_close(adapter);
2398
2399 return 0;
2400}
2401
2402static int lan743x_netdev_open(struct net_device *netdev)
2403{
2404 struct lan743x_adapter *adapter = netdev_priv(netdev);
2405 int index;
2406 int ret;
2407
2408 ret = lan743x_intr_open(adapter);
2409 if (ret)
2410 goto return_error;
2411
2412 ret = lan743x_mac_open(adapter);
2413 if (ret)
2414 goto close_intr;
2415
2416 ret = lan743x_phy_open(adapter);
2417 if (ret)
2418 goto close_mac;
2419
2420 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2421 ret = lan743x_rx_open(&adapter->rx[index]);
2422 if (ret)
2423 goto close_rx;
2424 }
2425
2426 ret = lan743x_tx_open(&adapter->tx[0]);
2427 if (ret)
2428 goto close_rx;
2429
2430 return 0;
2431
2432close_rx:
2433 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2434 if (adapter->rx[index].ring_cpu_ptr)
2435 lan743x_rx_close(&adapter->rx[index]);
2436 }
2437 lan743x_phy_close(adapter);
2438
2439close_mac:
2440 lan743x_mac_close(adapter);
2441
2442close_intr:
2443 lan743x_intr_close(adapter);
2444
2445return_error:
2446 netif_warn(adapter, ifup, adapter->netdev,
2447 "Error opening LAN743x\n");
2448 return ret;
2449}
2450
2451static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2452 struct net_device *netdev)
2453{
2454 struct lan743x_adapter *adapter = netdev_priv(netdev);
2455
2456 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2457}
2458
2459static int lan743x_netdev_ioctl(struct net_device *netdev,
2460 struct ifreq *ifr, int cmd)
2461{
2462 if (!netif_running(netdev))
2463 return -EINVAL;
2464 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2465}
2466
2467static void lan743x_netdev_set_multicast(struct net_device *netdev)
2468{
2469 struct lan743x_adapter *adapter = netdev_priv(netdev);
2470
2471 lan743x_rfe_set_multicast(adapter);
2472}
2473
2474static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2475{
2476 struct lan743x_adapter *adapter = netdev_priv(netdev);
2477 int ret = 0;
2478
2479 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2480 if (!ret)
2481 netdev->mtu = new_mtu;
2482 return ret;
2483}
2484
2485static void lan743x_netdev_get_stats64(struct net_device *netdev,
2486 struct rtnl_link_stats64 *stats)
2487{
2488 struct lan743x_adapter *adapter = netdev_priv(netdev);
2489
2490 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2491 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2492 stats->rx_bytes = lan743x_csr_read(adapter,
2493 STAT_RX_UNICAST_BYTE_COUNT) +
2494 lan743x_csr_read(adapter,
2495 STAT_RX_BROADCAST_BYTE_COUNT) +
2496 lan743x_csr_read(adapter,
2497 STAT_RX_MULTICAST_BYTE_COUNT);
2498 stats->tx_bytes = lan743x_csr_read(adapter,
2499 STAT_TX_UNICAST_BYTE_COUNT) +
2500 lan743x_csr_read(adapter,
2501 STAT_TX_BROADCAST_BYTE_COUNT) +
2502 lan743x_csr_read(adapter,
2503 STAT_TX_MULTICAST_BYTE_COUNT);
2504 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2505 lan743x_csr_read(adapter,
2506 STAT_RX_ALIGNMENT_ERRORS) +
2507 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2508 lan743x_csr_read(adapter,
2509 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2510 lan743x_csr_read(adapter,
2511 STAT_RX_OVERSIZE_FRAME_ERRORS);
2512 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2513 lan743x_csr_read(adapter,
2514 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2515 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2516 stats->rx_dropped = lan743x_csr_read(adapter,
2517 STAT_RX_DROPPED_FRAMES);
2518 stats->tx_dropped = lan743x_csr_read(adapter,
2519 STAT_TX_EXCESSIVE_COLLISION);
2520 stats->multicast = lan743x_csr_read(adapter,
2521 STAT_RX_MULTICAST_FRAMES) +
2522 lan743x_csr_read(adapter,
2523 STAT_TX_MULTICAST_FRAMES);
2524 stats->collisions = lan743x_csr_read(adapter,
2525 STAT_TX_SINGLE_COLLISIONS) +
2526 lan743x_csr_read(adapter,
2527 STAT_TX_MULTIPLE_COLLISIONS) +
2528 lan743x_csr_read(adapter,
2529 STAT_TX_LATE_COLLISIONS);
2530}
2531
2532static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2533 void *addr)
2534{
2535 struct lan743x_adapter *adapter = netdev_priv(netdev);
2536 struct sockaddr *sock_addr = addr;
2537 int ret;
2538
2539 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2540 if (ret)
2541 return ret;
2542 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2543 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2544 lan743x_rfe_update_mac_address(adapter);
2545 return 0;
2546}
2547
2548static const struct net_device_ops lan743x_netdev_ops = {
2549 .ndo_open = lan743x_netdev_open,
2550 .ndo_stop = lan743x_netdev_close,
2551 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2552 .ndo_do_ioctl = lan743x_netdev_ioctl,
2553 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2554 .ndo_change_mtu = lan743x_netdev_change_mtu,
2555 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2556 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2557};
2558
2559static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2560{
2561 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2562}
2563
2564static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2565{
2566 mdiobus_unregister(adapter->mdiobus);
2567}
2568
2569static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2570{
2571 unregister_netdev(adapter->netdev);
2572
2573 lan743x_mdiobus_cleanup(adapter);
2574 lan743x_hardware_cleanup(adapter);
2575 lan743x_pci_cleanup(adapter);
2576}
2577
2578static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2579 struct pci_dev *pdev)
2580{
2581 struct lan743x_tx *tx;
2582 int index;
2583 int ret;
2584
2585 adapter->intr.irq = adapter->pdev->irq;
2586 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2587 mutex_init(&adapter->dp_lock);
2588 ret = lan743x_mac_init(adapter);
2589 if (ret)
2590 return ret;
2591
2592 ret = lan743x_phy_init(adapter);
2593 if (ret)
2594 return ret;
2595
2596 lan743x_rfe_update_mac_address(adapter);
2597
2598 ret = lan743x_dmac_init(adapter);
2599 if (ret)
2600 return ret;
2601
2602 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2603 adapter->rx[index].adapter = adapter;
2604 adapter->rx[index].channel_number = index;
2605 }
2606
2607 tx = &adapter->tx[0];
2608 tx->adapter = adapter;
2609 tx->channel_number = 0;
2610 spin_lock_init(&tx->ring_lock);
2611 return 0;
2612}
2613
2614static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2615{
2616 int ret;
2617
2618 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2619 if (!(adapter->mdiobus)) {
2620 ret = -ENOMEM;
2621 goto return_error;
2622 }
2623
2624 adapter->mdiobus->priv = (void *)adapter;
2625 adapter->mdiobus->read = lan743x_mdiobus_read;
2626 adapter->mdiobus->write = lan743x_mdiobus_write;
2627 adapter->mdiobus->name = "lan743x-mdiobus";
2628 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2629 "pci-%s", pci_name(adapter->pdev));
2630
2631 /* set to internal PHY id */
2632 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2633
2634 /* register mdiobus */
2635 ret = mdiobus_register(adapter->mdiobus);
2636 if (ret < 0)
2637 goto return_error;
2638 return 0;
2639
2640return_error:
2641 return ret;
2642}
2643
2644/* lan743x_pcidev_probe - Device Initialization Routine
2645 * @pdev: PCI device information struct
2646 * @id: entry in lan743x_pci_tbl
2647 *
2648 * Returns 0 on success, negative on failure
2649 *
2650 * initializes an adapter identified by a pci_dev structure.
2651 * The OS initialization, configuring of the adapter private structure,
2652 * and a hardware reset occur.
2653 **/
2654static int lan743x_pcidev_probe(struct pci_dev *pdev,
2655 const struct pci_device_id *id)
2656{
2657 struct lan743x_adapter *adapter = NULL;
2658 struct net_device *netdev = NULL;
2659 int ret = -ENODEV;
2660
2661 netdev = devm_alloc_etherdev(&pdev->dev,
2662 sizeof(struct lan743x_adapter));
2663 if (!netdev)
2664 goto return_error;
2665
2666 SET_NETDEV_DEV(netdev, &pdev->dev);
2667 pci_set_drvdata(pdev, netdev);
2668 adapter = netdev_priv(netdev);
2669 adapter->netdev = netdev;
2670 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2671 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2672 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2673 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2674
2675 ret = lan743x_pci_init(adapter, pdev);
2676 if (ret)
2677 goto return_error;
2678
2679 ret = lan743x_csr_init(adapter);
2680 if (ret)
2681 goto cleanup_pci;
2682
2683 ret = lan743x_hardware_init(adapter, pdev);
2684 if (ret)
2685 goto cleanup_pci;
2686
2687 ret = lan743x_mdiobus_init(adapter);
2688 if (ret)
2689 goto cleanup_hardware;
2690
2691 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2692 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2693 adapter->netdev->hw_features = adapter->netdev->features;
2694
2695 /* carrier off reporting is important to ethtool even BEFORE open */
2696 netif_carrier_off(netdev);
2697
2698 ret = register_netdev(adapter->netdev);
2699 if (ret < 0)
2700 goto cleanup_mdiobus;
2701 return 0;
2702
2703cleanup_mdiobus:
2704 lan743x_mdiobus_cleanup(adapter);
2705
2706cleanup_hardware:
2707 lan743x_hardware_cleanup(adapter);
2708
2709cleanup_pci:
2710 lan743x_pci_cleanup(adapter);
2711
2712return_error:
2713 pr_warn("Initialization failed\n");
2714 return ret;
2715}
2716
2717/**
2718 * lan743x_pcidev_remove - Device Removal Routine
2719 * @pdev: PCI device information struct
2720 *
2721 * this is called by the PCI subsystem to alert the driver
2722 * that it should release a PCI device. This could be caused by a
2723 * Hot-Plug event, or because the driver is going to be removed from
2724 * memory.
2725 **/
2726static void lan743x_pcidev_remove(struct pci_dev *pdev)
2727{
2728 struct net_device *netdev = pci_get_drvdata(pdev);
2729 struct lan743x_adapter *adapter = netdev_priv(netdev);
2730
2731 lan743x_full_cleanup(adapter);
2732}
2733
2734static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2735{
2736 struct net_device *netdev = pci_get_drvdata(pdev);
2737 struct lan743x_adapter *adapter = netdev_priv(netdev);
2738
2739 rtnl_lock();
2740 netif_device_detach(netdev);
2741
2742 /* close netdev when netdev is at running state.
2743 * For instance, it is true when system goes to sleep by pm-suspend
2744 * However, it is false when system goes to sleep by suspend GUI menu
2745 */
2746 if (netif_running(netdev))
2747 lan743x_netdev_close(netdev);
2748 rtnl_unlock();
2749
2750 /* clean up lan743x portion */
2751 lan743x_hardware_cleanup(adapter);
2752}
2753
2754static const struct pci_device_id lan743x_pcidev_tbl[] = {
2755 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
2756 { 0, }
2757};
2758
2759static struct pci_driver lan743x_pcidev_driver = {
2760 .name = DRIVER_NAME,
2761 .id_table = lan743x_pcidev_tbl,
2762 .probe = lan743x_pcidev_probe,
2763 .remove = lan743x_pcidev_remove,
2764 .shutdown = lan743x_pcidev_shutdown,
2765};
2766
2767module_pci_driver(lan743x_pcidev_driver);
2768
2769MODULE_AUTHOR(DRIVER_AUTHOR);
2770MODULE_DESCRIPTION(DRIVER_DESC);
2771MODULE_LICENSE("GPL");
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(struct lan743x_adapter *adapter)
144{
145 struct lan743x_intr *intr = &adapter->intr;
146
147 /* disable the interrupt to prevent repeated re-triggering */
148 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
149 intr->software_isr_flag = true;
150 wake_up(&intr->software_isr_wq);
151}
152
153static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
154{
155 struct lan743x_tx *tx = context;
156 struct lan743x_adapter *adapter = tx->adapter;
157 bool enable_flag = true;
158
159 lan743x_csr_read(adapter, INT_EN_SET);
160 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
161 lan743x_csr_write(adapter, INT_EN_CLR,
162 INT_BIT_DMA_TX_(tx->channel_number));
163 }
164
165 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
166 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
167 u32 dmac_int_sts;
168 u32 dmac_int_en;
169
170 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
171 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
172 else
173 dmac_int_sts = ioc_bit;
174 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
175 dmac_int_en = lan743x_csr_read(adapter,
176 DMAC_INT_EN_SET);
177 else
178 dmac_int_en = ioc_bit;
179
180 dmac_int_en &= ioc_bit;
181 dmac_int_sts &= dmac_int_en;
182 if (dmac_int_sts & ioc_bit) {
183 napi_schedule(&tx->napi);
184 enable_flag = false;/* poll func will enable later */
185 }
186 }
187
188 if (enable_flag)
189 /* enable isr */
190 lan743x_csr_write(adapter, INT_EN_SET,
191 INT_BIT_DMA_TX_(tx->channel_number));
192}
193
194static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
195{
196 struct lan743x_rx *rx = context;
197 struct lan743x_adapter *adapter = rx->adapter;
198 bool enable_flag = true;
199
200 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
201 lan743x_csr_write(adapter, INT_EN_CLR,
202 INT_BIT_DMA_RX_(rx->channel_number));
203 }
204
205 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
206 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
207 u32 dmac_int_sts;
208 u32 dmac_int_en;
209
210 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
211 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
212 else
213 dmac_int_sts = rx_frame_bit;
214 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
215 dmac_int_en = lan743x_csr_read(adapter,
216 DMAC_INT_EN_SET);
217 else
218 dmac_int_en = rx_frame_bit;
219
220 dmac_int_en &= rx_frame_bit;
221 dmac_int_sts &= dmac_int_en;
222 if (dmac_int_sts & rx_frame_bit) {
223 napi_schedule(&rx->napi);
224 enable_flag = false;/* poll funct will enable later */
225 }
226 }
227
228 if (enable_flag) {
229 /* enable isr */
230 lan743x_csr_write(adapter, INT_EN_SET,
231 INT_BIT_DMA_RX_(rx->channel_number));
232 }
233}
234
235static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
236{
237 struct lan743x_adapter *adapter = context;
238 unsigned int channel;
239
240 if (int_sts & INT_BIT_ALL_RX_) {
241 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
242 channel++) {
243 u32 int_bit = INT_BIT_DMA_RX_(channel);
244
245 if (int_sts & int_bit) {
246 lan743x_rx_isr(&adapter->rx[channel],
247 int_bit, flags);
248 int_sts &= ~int_bit;
249 }
250 }
251 }
252 if (int_sts & INT_BIT_ALL_TX_) {
253 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
254 channel++) {
255 u32 int_bit = INT_BIT_DMA_TX_(channel);
256
257 if (int_sts & int_bit) {
258 lan743x_tx_isr(&adapter->tx[channel],
259 int_bit, flags);
260 int_sts &= ~int_bit;
261 }
262 }
263 }
264 if (int_sts & INT_BIT_ALL_OTHER_) {
265 if (int_sts & INT_BIT_SW_GP_) {
266 lan743x_intr_software_isr(adapter);
267 int_sts &= ~INT_BIT_SW_GP_;
268 }
269 if (int_sts & INT_BIT_1588_) {
270 lan743x_ptp_isr(adapter);
271 int_sts &= ~INT_BIT_1588_;
272 }
273 }
274 if (int_sts)
275 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
276}
277
278static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
279{
280 struct lan743x_vector *vector = ptr;
281 struct lan743x_adapter *adapter = vector->adapter;
282 irqreturn_t result = IRQ_NONE;
283 u32 int_enables;
284 u32 int_sts;
285
286 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
287 int_sts = lan743x_csr_read(adapter, INT_STS);
288 } else if (vector->flags &
289 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
290 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
291 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
292 } else {
293 /* use mask as implied status */
294 int_sts = vector->int_mask | INT_BIT_MAS_;
295 }
296
297 if (!(int_sts & INT_BIT_MAS_))
298 goto irq_done;
299
300 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
301 /* disable vector interrupt */
302 lan743x_csr_write(adapter,
303 INT_VEC_EN_CLR,
304 INT_VEC_EN_(vector->vector_index));
305
306 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
307 /* disable master interrupt */
308 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
309
310 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
311 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
312 } else {
313 /* use vector mask as implied enable mask */
314 int_enables = vector->int_mask;
315 }
316
317 int_sts &= int_enables;
318 int_sts &= vector->int_mask;
319 if (int_sts) {
320 if (vector->handler) {
321 vector->handler(vector->context,
322 int_sts, vector->flags);
323 } else {
324 /* disable interrupts on this vector */
325 lan743x_csr_write(adapter, INT_EN_CLR,
326 vector->int_mask);
327 }
328 result = IRQ_HANDLED;
329 }
330
331 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
332 /* enable master interrupt */
333 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
334
335 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
336 /* enable vector interrupt */
337 lan743x_csr_write(adapter,
338 INT_VEC_EN_SET,
339 INT_VEC_EN_(vector->vector_index));
340irq_done:
341 return result;
342}
343
344static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
345{
346 struct lan743x_intr *intr = &adapter->intr;
347 int ret;
348
349 intr->software_isr_flag = false;
350
351 /* enable and activate test interrupt */
352 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
353 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
354
355 ret = wait_event_timeout(intr->software_isr_wq,
356 intr->software_isr_flag,
357 msecs_to_jiffies(200));
358
359 /* disable test interrupt */
360 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
361
362 return ret > 0 ? 0 : -ENODEV;
363}
364
365static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
366 int vector_index, u32 flags,
367 u32 int_mask,
368 lan743x_vector_handler handler,
369 void *context)
370{
371 struct lan743x_vector *vector = &adapter->intr.vector_list
372 [vector_index];
373 int ret;
374
375 vector->adapter = adapter;
376 vector->flags = flags;
377 vector->vector_index = vector_index;
378 vector->int_mask = int_mask;
379 vector->handler = handler;
380 vector->context = context;
381
382 ret = request_irq(vector->irq,
383 lan743x_intr_entry_isr,
384 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
385 IRQF_SHARED : 0, DRIVER_NAME, vector);
386 if (ret) {
387 vector->handler = NULL;
388 vector->context = NULL;
389 vector->int_mask = 0;
390 vector->flags = 0;
391 }
392 return ret;
393}
394
395static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
396 int vector_index)
397{
398 struct lan743x_vector *vector = &adapter->intr.vector_list
399 [vector_index];
400
401 free_irq(vector->irq, vector);
402 vector->handler = NULL;
403 vector->context = NULL;
404 vector->int_mask = 0;
405 vector->flags = 0;
406}
407
408static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
409 u32 int_mask)
410{
411 int index;
412
413 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
414 if (adapter->intr.vector_list[index].int_mask & int_mask)
415 return adapter->intr.vector_list[index].flags;
416 }
417 return 0;
418}
419
420static void lan743x_intr_close(struct lan743x_adapter *adapter)
421{
422 struct lan743x_intr *intr = &adapter->intr;
423 int index = 0;
424
425 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
426 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
427
428 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
429 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
430 lan743x_intr_unregister_isr(adapter, index);
431 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
432 }
433 }
434
435 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
436 pci_disable_msi(adapter->pdev);
437 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
438 }
439
440 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
441 pci_disable_msix(adapter->pdev);
442 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
443 }
444}
445
446static int lan743x_intr_open(struct lan743x_adapter *adapter)
447{
448 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
449 struct lan743x_intr *intr = &adapter->intr;
450 u32 int_vec_en_auto_clr = 0;
451 u32 int_vec_map0 = 0;
452 u32 int_vec_map1 = 0;
453 int ret = -ENODEV;
454 int index = 0;
455 u32 flags = 0;
456
457 intr->number_of_vectors = 0;
458
459 /* Try to set up MSIX interrupts */
460 memset(&msix_entries[0], 0,
461 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
462 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
463 msix_entries[index].entry = index;
464 ret = pci_enable_msix_range(adapter->pdev,
465 msix_entries, 1,
466 1 + LAN743X_USED_TX_CHANNELS +
467 LAN743X_USED_RX_CHANNELS);
468
469 if (ret > 0) {
470 intr->flags |= INTR_FLAG_MSIX_ENABLED;
471 intr->number_of_vectors = ret;
472 intr->using_vectors = true;
473 for (index = 0; index < intr->number_of_vectors; index++)
474 intr->vector_list[index].irq = msix_entries
475 [index].vector;
476 netif_info(adapter, ifup, adapter->netdev,
477 "using MSIX interrupts, number of vectors = %d\n",
478 intr->number_of_vectors);
479 }
480
481 /* If MSIX failed try to setup using MSI interrupts */
482 if (!intr->number_of_vectors) {
483 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
484 if (!pci_enable_msi(adapter->pdev)) {
485 intr->flags |= INTR_FLAG_MSI_ENABLED;
486 intr->number_of_vectors = 1;
487 intr->using_vectors = true;
488 intr->vector_list[0].irq =
489 adapter->pdev->irq;
490 netif_info(adapter, ifup, adapter->netdev,
491 "using MSI interrupts, number of vectors = %d\n",
492 intr->number_of_vectors);
493 }
494 }
495 }
496
497 /* If MSIX, and MSI failed, setup using legacy interrupt */
498 if (!intr->number_of_vectors) {
499 intr->number_of_vectors = 1;
500 intr->using_vectors = false;
501 intr->vector_list[0].irq = intr->irq;
502 netif_info(adapter, ifup, adapter->netdev,
503 "using legacy interrupts\n");
504 }
505
506 /* At this point we must have at least one irq */
507 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
508
509 /* map all interrupts to vector 0 */
510 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
511 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
512 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
513 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
514 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
515 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
516 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
517
518 if (intr->using_vectors) {
519 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
520 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
521 } else {
522 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
523 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
524 LAN743X_VECTOR_FLAG_IRQ_SHARED;
525 }
526
527 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
528 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
529 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
530 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
531 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
532 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
533 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
534 }
535
536 init_waitqueue_head(&intr->software_isr_wq);
537
538 ret = lan743x_intr_register_isr(adapter, 0, flags,
539 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
540 INT_BIT_ALL_OTHER_,
541 lan743x_intr_shared_isr, adapter);
542 if (ret)
543 goto clean_up;
544 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
545
546 if (intr->using_vectors)
547 lan743x_csr_write(adapter, INT_VEC_EN_SET,
548 INT_VEC_EN_(0));
549
550 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
551 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
552 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
553 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
554 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
555 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
556 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
557 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
558 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
559 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
560 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
561 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
562 }
563
564 /* enable interrupts */
565 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
566 ret = lan743x_intr_test_isr(adapter);
567 if (ret)
568 goto clean_up;
569
570 if (intr->number_of_vectors > 1) {
571 int number_of_tx_vectors = intr->number_of_vectors - 1;
572
573 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
574 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
575 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
576 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
577 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
578 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
579 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
580 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
581
582 if (adapter->csr.flags &
583 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
584 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
585 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
586 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
587 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
588 }
589
590 for (index = 0; index < number_of_tx_vectors; index++) {
591 u32 int_bit = INT_BIT_DMA_TX_(index);
592 int vector = index + 1;
593
594 /* map TX interrupt to vector */
595 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
596 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
597
598 /* Remove TX interrupt from shared mask */
599 intr->vector_list[0].int_mask &= ~int_bit;
600 ret = lan743x_intr_register_isr(adapter, vector, flags,
601 int_bit, lan743x_tx_isr,
602 &adapter->tx[index]);
603 if (ret)
604 goto clean_up;
605 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
606 if (!(flags &
607 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
608 lan743x_csr_write(adapter, INT_VEC_EN_SET,
609 INT_VEC_EN_(vector));
610 }
611 }
612 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
613 int number_of_rx_vectors = intr->number_of_vectors -
614 LAN743X_USED_TX_CHANNELS - 1;
615
616 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
617 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
618
619 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
620 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
621 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
622 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
623 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
624 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
625
626 if (adapter->csr.flags &
627 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
628 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
629 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
630 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
631 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
632 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
633 }
634 for (index = 0; index < number_of_rx_vectors; index++) {
635 int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
636 u32 int_bit = INT_BIT_DMA_RX_(index);
637
638 /* map RX interrupt to vector */
639 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
640 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
641 if (flags &
642 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
643 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
644 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
645 int_vec_en_auto_clr);
646 }
647
648 /* Remove RX interrupt from shared mask */
649 intr->vector_list[0].int_mask &= ~int_bit;
650 ret = lan743x_intr_register_isr(adapter, vector, flags,
651 int_bit, lan743x_rx_isr,
652 &adapter->rx[index]);
653 if (ret)
654 goto clean_up;
655 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
656
657 lan743x_csr_write(adapter, INT_VEC_EN_SET,
658 INT_VEC_EN_(vector));
659 }
660 }
661 return 0;
662
663clean_up:
664 lan743x_intr_close(adapter);
665 return ret;
666}
667
668static int lan743x_dp_write(struct lan743x_adapter *adapter,
669 u32 select, u32 addr, u32 length, u32 *buf)
670{
671 u32 dp_sel;
672 int i;
673
674 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
675 1, 40, 100, 100))
676 return -EIO;
677 dp_sel = lan743x_csr_read(adapter, DP_SEL);
678 dp_sel &= ~DP_SEL_MASK_;
679 dp_sel |= select;
680 lan743x_csr_write(adapter, DP_SEL, dp_sel);
681
682 for (i = 0; i < length; i++) {
683 lan743x_csr_write(adapter, DP_ADDR, addr + i);
684 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
685 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
686 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
687 1, 40, 100, 100))
688 return -EIO;
689 }
690
691 return 0;
692}
693
694static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
695{
696 u32 ret;
697
698 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
699 MAC_MII_ACC_PHY_ADDR_MASK_;
700 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
701 MAC_MII_ACC_MIIRINDA_MASK_;
702
703 if (read)
704 ret |= MAC_MII_ACC_MII_READ_;
705 else
706 ret |= MAC_MII_ACC_MII_WRITE_;
707 ret |= MAC_MII_ACC_MII_BUSY_;
708
709 return ret;
710}
711
712static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
713{
714 u32 data;
715
716 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
717 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
718}
719
720static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
721{
722 struct lan743x_adapter *adapter = bus->priv;
723 u32 val, mii_access;
724 int ret;
725
726 /* comfirm MII not busy */
727 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
728 if (ret < 0)
729 return ret;
730
731 /* set the address, index & direction (read from PHY) */
732 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
733 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
734 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
735 if (ret < 0)
736 return ret;
737
738 val = lan743x_csr_read(adapter, MAC_MII_DATA);
739 return (int)(val & 0xFFFF);
740}
741
742static int lan743x_mdiobus_write(struct mii_bus *bus,
743 int phy_id, int index, u16 regval)
744{
745 struct lan743x_adapter *adapter = bus->priv;
746 u32 val, mii_access;
747 int ret;
748
749 /* confirm MII not busy */
750 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
751 if (ret < 0)
752 return ret;
753 val = (u32)regval;
754 lan743x_csr_write(adapter, MAC_MII_DATA, val);
755
756 /* set the address, index & direction (write to PHY) */
757 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
758 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
759 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
760 return ret;
761}
762
763static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
764 u8 *addr)
765{
766 u32 addr_lo, addr_hi;
767
768 addr_lo = addr[0] |
769 addr[1] << 8 |
770 addr[2] << 16 |
771 addr[3] << 24;
772 addr_hi = addr[4] |
773 addr[5] << 8;
774 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
775 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
776
777 ether_addr_copy(adapter->mac_address, addr);
778 netif_info(adapter, drv, adapter->netdev,
779 "MAC address set to %pM\n", addr);
780}
781
782static int lan743x_mac_init(struct lan743x_adapter *adapter)
783{
784 bool mac_address_valid = true;
785 struct net_device *netdev;
786 u32 mac_addr_hi = 0;
787 u32 mac_addr_lo = 0;
788 u32 data;
789
790 netdev = adapter->netdev;
791
792 /* disable auto duplex, and speed detection. Phylib does that */
793 data = lan743x_csr_read(adapter, MAC_CR);
794 data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
795 data |= MAC_CR_CNTR_RST_;
796 lan743x_csr_write(adapter, MAC_CR, data);
797
798 if (!is_valid_ether_addr(adapter->mac_address)) {
799 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
800 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
801 adapter->mac_address[0] = mac_addr_lo & 0xFF;
802 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
803 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
804 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
805 adapter->mac_address[4] = mac_addr_hi & 0xFF;
806 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
807
808 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
809 mac_addr_lo == 0xFFFFFFFF) {
810 mac_address_valid = false;
811 } else if (!is_valid_ether_addr(adapter->mac_address)) {
812 mac_address_valid = false;
813 }
814
815 if (!mac_address_valid)
816 eth_random_addr(adapter->mac_address);
817 }
818 lan743x_mac_set_address(adapter, adapter->mac_address);
819 ether_addr_copy(netdev->dev_addr, adapter->mac_address);
820
821 return 0;
822}
823
824static int lan743x_mac_open(struct lan743x_adapter *adapter)
825{
826 u32 temp;
827
828 temp = lan743x_csr_read(adapter, MAC_RX);
829 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
830 temp = lan743x_csr_read(adapter, MAC_TX);
831 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
832 return 0;
833}
834
835static void lan743x_mac_close(struct lan743x_adapter *adapter)
836{
837 u32 temp;
838
839 temp = lan743x_csr_read(adapter, MAC_TX);
840 temp &= ~MAC_TX_TXEN_;
841 lan743x_csr_write(adapter, MAC_TX, temp);
842 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
843 1, 1000, 20000, 100);
844
845 temp = lan743x_csr_read(adapter, MAC_RX);
846 temp &= ~MAC_RX_RXEN_;
847 lan743x_csr_write(adapter, MAC_RX, temp);
848 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
849 1, 1000, 20000, 100);
850}
851
852static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
853 bool tx_enable, bool rx_enable)
854{
855 u32 flow_setting = 0;
856
857 /* set maximum pause time because when fifo space frees
858 * up a zero value pause frame will be sent to release the pause
859 */
860 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
861 if (tx_enable)
862 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
863 if (rx_enable)
864 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
865 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
866}
867
868static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
869{
870 int enabled = 0;
871 u32 mac_rx = 0;
872
873 mac_rx = lan743x_csr_read(adapter, MAC_RX);
874 if (mac_rx & MAC_RX_RXEN_) {
875 enabled = 1;
876 if (mac_rx & MAC_RX_RXD_) {
877 lan743x_csr_write(adapter, MAC_RX, mac_rx);
878 mac_rx &= ~MAC_RX_RXD_;
879 }
880 mac_rx &= ~MAC_RX_RXEN_;
881 lan743x_csr_write(adapter, MAC_RX, mac_rx);
882 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
883 1, 1000, 20000, 100);
884 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
885 }
886
887 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
888 mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN)
889 << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
890 lan743x_csr_write(adapter, MAC_RX, mac_rx);
891
892 if (enabled) {
893 mac_rx |= MAC_RX_RXEN_;
894 lan743x_csr_write(adapter, MAC_RX, mac_rx);
895 }
896 return 0;
897}
898
899/* PHY */
900static int lan743x_phy_reset(struct lan743x_adapter *adapter)
901{
902 u32 data;
903
904 /* Only called with in probe, and before mdiobus_register */
905
906 data = lan743x_csr_read(adapter, PMT_CTL);
907 data |= PMT_CTL_ETH_PHY_RST_;
908 lan743x_csr_write(adapter, PMT_CTL, data);
909
910 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
911 (!(data & PMT_CTL_ETH_PHY_RST_) &&
912 (data & PMT_CTL_READY_)),
913 50000, 1000000);
914}
915
916static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
917 u8 duplex, u16 local_adv,
918 u16 remote_adv)
919{
920 struct lan743x_phy *phy = &adapter->phy;
921 u8 cap;
922
923 if (phy->fc_autoneg)
924 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
925 else
926 cap = phy->fc_request_control;
927
928 lan743x_mac_flow_ctrl_set_enables(adapter,
929 cap & FLOW_CTRL_TX,
930 cap & FLOW_CTRL_RX);
931}
932
933static int lan743x_phy_init(struct lan743x_adapter *adapter)
934{
935 return lan743x_phy_reset(adapter);
936}
937
938static void lan743x_phy_link_status_change(struct net_device *netdev)
939{
940 struct lan743x_adapter *adapter = netdev_priv(netdev);
941 struct phy_device *phydev = netdev->phydev;
942 u32 data;
943
944 phy_print_status(phydev);
945 if (phydev->state == PHY_RUNNING) {
946 struct ethtool_link_ksettings ksettings;
947 int remote_advertisement = 0;
948 int local_advertisement = 0;
949
950 data = lan743x_csr_read(adapter, MAC_CR);
951
952 /* set interface mode */
953 if (phy_interface_is_rgmii(phydev))
954 /* RGMII */
955 data &= ~MAC_CR_MII_EN_;
956 else
957 /* GMII */
958 data |= MAC_CR_MII_EN_;
959
960 /* set duplex mode */
961 if (phydev->duplex)
962 data |= MAC_CR_DPX_;
963 else
964 data &= ~MAC_CR_DPX_;
965
966 /* set bus speed */
967 switch (phydev->speed) {
968 case SPEED_10:
969 data &= ~MAC_CR_CFG_H_;
970 data &= ~MAC_CR_CFG_L_;
971 break;
972 case SPEED_100:
973 data &= ~MAC_CR_CFG_H_;
974 data |= MAC_CR_CFG_L_;
975 break;
976 case SPEED_1000:
977 data |= MAC_CR_CFG_H_;
978 data &= ~MAC_CR_CFG_L_;
979 break;
980 }
981 lan743x_csr_write(adapter, MAC_CR, data);
982
983 memset(&ksettings, 0, sizeof(ksettings));
984 phy_ethtool_get_link_ksettings(netdev, &ksettings);
985 local_advertisement =
986 linkmode_adv_to_mii_adv_t(phydev->advertising);
987 remote_advertisement =
988 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
989
990 lan743x_phy_update_flowcontrol(adapter,
991 ksettings.base.duplex,
992 local_advertisement,
993 remote_advertisement);
994 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
995 }
996}
997
998static void lan743x_phy_close(struct lan743x_adapter *adapter)
999{
1000 struct net_device *netdev = adapter->netdev;
1001
1002 phy_stop(netdev->phydev);
1003 phy_disconnect(netdev->phydev);
1004 netdev->phydev = NULL;
1005}
1006
1007static int lan743x_phy_open(struct lan743x_adapter *adapter)
1008{
1009 struct net_device *netdev = adapter->netdev;
1010 struct lan743x_phy *phy = &adapter->phy;
1011 struct phy_device *phydev;
1012 int ret = -EIO;
1013
1014 /* try devicetree phy, or fixed link */
1015 phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1016 lan743x_phy_link_status_change);
1017
1018 if (!phydev) {
1019 /* try internal phy */
1020 phydev = phy_find_first(adapter->mdiobus);
1021 if (!phydev)
1022 goto return_error;
1023
1024 ret = phy_connect_direct(netdev, phydev,
1025 lan743x_phy_link_status_change,
1026 PHY_INTERFACE_MODE_GMII);
1027 if (ret)
1028 goto return_error;
1029 }
1030
1031 /* MAC doesn't support 1000T Half */
1032 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1033
1034 /* support both flow controls */
1035 phy_support_asym_pause(phydev);
1036 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1037 phy->fc_autoneg = phydev->autoneg;
1038
1039 phy_start(phydev);
1040 phy_start_aneg(phydev);
1041 phy_attached_info(phydev);
1042 return 0;
1043
1044return_error:
1045 return ret;
1046}
1047
1048static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1049{
1050 lan743x_csr_write(adapter, RFE_RSS_CFG,
1051 RFE_RSS_CFG_UDP_IPV6_EX_ |
1052 RFE_RSS_CFG_TCP_IPV6_EX_ |
1053 RFE_RSS_CFG_IPV6_EX_ |
1054 RFE_RSS_CFG_UDP_IPV6_ |
1055 RFE_RSS_CFG_TCP_IPV6_ |
1056 RFE_RSS_CFG_IPV6_ |
1057 RFE_RSS_CFG_UDP_IPV4_ |
1058 RFE_RSS_CFG_TCP_IPV4_ |
1059 RFE_RSS_CFG_IPV4_ |
1060 RFE_RSS_CFG_VALID_HASH_BITS_ |
1061 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1062 RFE_RSS_CFG_RSS_HASH_STORE_ |
1063 RFE_RSS_CFG_RSS_ENABLE_);
1064}
1065
1066static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1067{
1068 u8 *mac_addr;
1069 u32 mac_addr_hi = 0;
1070 u32 mac_addr_lo = 0;
1071
1072 /* Add mac address to perfect Filter */
1073 mac_addr = adapter->mac_address;
1074 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1075 (((u32)(mac_addr[1])) << 8) |
1076 (((u32)(mac_addr[2])) << 16) |
1077 (((u32)(mac_addr[3])) << 24));
1078 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1079 (((u32)(mac_addr[5])) << 8));
1080
1081 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1082 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1083 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1084}
1085
1086static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1087{
1088 struct net_device *netdev = adapter->netdev;
1089 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1090 u32 rfctl;
1091 u32 data;
1092
1093 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1094 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1095 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1096 rfctl |= RFE_CTL_AB_;
1097 if (netdev->flags & IFF_PROMISC) {
1098 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1099 } else {
1100 if (netdev->flags & IFF_ALLMULTI)
1101 rfctl |= RFE_CTL_AM_;
1102 }
1103
1104 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1105 if (netdev_mc_count(netdev)) {
1106 struct netdev_hw_addr *ha;
1107 int i;
1108
1109 rfctl |= RFE_CTL_DA_PERFECT_;
1110 i = 1;
1111 netdev_for_each_mc_addr(ha, netdev) {
1112 /* set first 32 into Perfect Filter */
1113 if (i < 33) {
1114 lan743x_csr_write(adapter,
1115 RFE_ADDR_FILT_HI(i), 0);
1116 data = ha->addr[3];
1117 data = ha->addr[2] | (data << 8);
1118 data = ha->addr[1] | (data << 8);
1119 data = ha->addr[0] | (data << 8);
1120 lan743x_csr_write(adapter,
1121 RFE_ADDR_FILT_LO(i), data);
1122 data = ha->addr[5];
1123 data = ha->addr[4] | (data << 8);
1124 data |= RFE_ADDR_FILT_HI_VALID_;
1125 lan743x_csr_write(adapter,
1126 RFE_ADDR_FILT_HI(i), data);
1127 } else {
1128 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1129 23) & 0x1FF;
1130 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1131 rfctl |= RFE_CTL_MCAST_HASH_;
1132 }
1133 i++;
1134 }
1135 }
1136
1137 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1138 DP_SEL_VHF_VLAN_LEN,
1139 DP_SEL_VHF_HASH_LEN, hash_table);
1140 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1141}
1142
1143static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1144{
1145 u32 data = 0;
1146
1147 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1148 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1149 0, 1000, 20000, 100);
1150 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1151 case DMA_DESCRIPTOR_SPACING_16:
1152 data = DMAC_CFG_MAX_DSPACE_16_;
1153 break;
1154 case DMA_DESCRIPTOR_SPACING_32:
1155 data = DMAC_CFG_MAX_DSPACE_32_;
1156 break;
1157 case DMA_DESCRIPTOR_SPACING_64:
1158 data = DMAC_CFG_MAX_DSPACE_64_;
1159 break;
1160 case DMA_DESCRIPTOR_SPACING_128:
1161 data = DMAC_CFG_MAX_DSPACE_128_;
1162 break;
1163 default:
1164 return -EPERM;
1165 }
1166 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1167 data |= DMAC_CFG_COAL_EN_;
1168 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1169 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1170 lan743x_csr_write(adapter, DMAC_CFG, data);
1171 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1172 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1173 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1174 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1175 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1176 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1177 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1178 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1179 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1180 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1181 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1182 return 0;
1183}
1184
1185static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1186 int tx_channel)
1187{
1188 u32 dmac_cmd = 0;
1189
1190 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1191 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1192 DMAC_CMD_START_T_(tx_channel)),
1193 (dmac_cmd &
1194 DMAC_CMD_STOP_T_(tx_channel)));
1195}
1196
1197static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1198 int tx_channel)
1199{
1200 int timeout = 100;
1201 int result = 0;
1202
1203 while (timeout &&
1204 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1205 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1206 usleep_range(1000, 20000);
1207 timeout--;
1208 }
1209 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1210 result = -ENODEV;
1211 return result;
1212}
1213
1214static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1215 int rx_channel)
1216{
1217 u32 dmac_cmd = 0;
1218
1219 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1220 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1221 DMAC_CMD_START_R_(rx_channel)),
1222 (dmac_cmd &
1223 DMAC_CMD_STOP_R_(rx_channel)));
1224}
1225
1226static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1227 int rx_channel)
1228{
1229 int timeout = 100;
1230 int result = 0;
1231
1232 while (timeout &&
1233 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1234 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1235 usleep_range(1000, 20000);
1236 timeout--;
1237 }
1238 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1239 result = -ENODEV;
1240 return result;
1241}
1242
1243static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1244 int descriptor_index, bool cleanup)
1245{
1246 struct lan743x_tx_buffer_info *buffer_info = NULL;
1247 struct lan743x_tx_descriptor *descriptor = NULL;
1248 u32 descriptor_type = 0;
1249 bool ignore_sync;
1250
1251 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1252 buffer_info = &tx->buffer_info[descriptor_index];
1253 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1254 goto done;
1255
1256 descriptor_type = le32_to_cpu(descriptor->data0) &
1257 TX_DESC_DATA0_DTYPE_MASK_;
1258 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1259 goto clean_up_data_descriptor;
1260 else
1261 goto clear_active;
1262
1263clean_up_data_descriptor:
1264 if (buffer_info->dma_ptr) {
1265 if (buffer_info->flags &
1266 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1267 dma_unmap_page(&tx->adapter->pdev->dev,
1268 buffer_info->dma_ptr,
1269 buffer_info->buffer_length,
1270 DMA_TO_DEVICE);
1271 } else {
1272 dma_unmap_single(&tx->adapter->pdev->dev,
1273 buffer_info->dma_ptr,
1274 buffer_info->buffer_length,
1275 DMA_TO_DEVICE);
1276 }
1277 buffer_info->dma_ptr = 0;
1278 buffer_info->buffer_length = 0;
1279 }
1280 if (!buffer_info->skb)
1281 goto clear_active;
1282
1283 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1284 dev_kfree_skb_any(buffer_info->skb);
1285 goto clear_skb;
1286 }
1287
1288 if (cleanup) {
1289 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1290 dev_kfree_skb_any(buffer_info->skb);
1291 } else {
1292 ignore_sync = (buffer_info->flags &
1293 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1294 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1295 buffer_info->skb, ignore_sync);
1296 }
1297
1298clear_skb:
1299 buffer_info->skb = NULL;
1300
1301clear_active:
1302 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1303
1304done:
1305 memset(buffer_info, 0, sizeof(*buffer_info));
1306 memset(descriptor, 0, sizeof(*descriptor));
1307}
1308
1309static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1310{
1311 return ((++index) % tx->ring_size);
1312}
1313
1314static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1315{
1316 while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1317 lan743x_tx_release_desc(tx, tx->last_head, false);
1318 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1319 }
1320}
1321
1322static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1323{
1324 u32 original_head = 0;
1325
1326 original_head = tx->last_head;
1327 do {
1328 lan743x_tx_release_desc(tx, tx->last_head, true);
1329 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1330 } while (tx->last_head != original_head);
1331 memset(tx->ring_cpu_ptr, 0,
1332 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1333 memset(tx->buffer_info, 0,
1334 sizeof(*tx->buffer_info) * (tx->ring_size));
1335}
1336
1337static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1338 struct sk_buff *skb)
1339{
1340 int result = 1; /* 1 for the main skb buffer */
1341 int nr_frags = 0;
1342
1343 if (skb_is_gso(skb))
1344 result++; /* requires an extension descriptor */
1345 nr_frags = skb_shinfo(skb)->nr_frags;
1346 result += nr_frags; /* 1 for each fragment buffer */
1347 return result;
1348}
1349
1350static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1351{
1352 int last_head = tx->last_head;
1353 int last_tail = tx->last_tail;
1354
1355 if (last_tail >= last_head)
1356 return tx->ring_size - last_tail + last_head - 1;
1357 else
1358 return last_head - last_tail - 1;
1359}
1360
1361void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1362 bool enable_timestamping,
1363 bool enable_onestep_sync)
1364{
1365 if (enable_timestamping)
1366 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1367 else
1368 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1369 if (enable_onestep_sync)
1370 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1371 else
1372 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1373}
1374
1375static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1376 unsigned char *first_buffer,
1377 unsigned int first_buffer_length,
1378 unsigned int frame_length,
1379 bool time_stamp,
1380 bool check_sum)
1381{
1382 /* called only from within lan743x_tx_xmit_frame.
1383 * assuming tx->ring_lock has already been acquired.
1384 */
1385 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1386 struct lan743x_tx_buffer_info *buffer_info = NULL;
1387 struct lan743x_adapter *adapter = tx->adapter;
1388 struct device *dev = &adapter->pdev->dev;
1389 dma_addr_t dma_ptr;
1390
1391 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1392 tx->frame_first = tx->last_tail;
1393 tx->frame_tail = tx->frame_first;
1394
1395 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1396 buffer_info = &tx->buffer_info[tx->frame_tail];
1397 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1398 DMA_TO_DEVICE);
1399 if (dma_mapping_error(dev, dma_ptr))
1400 return -ENOMEM;
1401
1402 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1403 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1404 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1405 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1406
1407 buffer_info->skb = NULL;
1408 buffer_info->dma_ptr = dma_ptr;
1409 buffer_info->buffer_length = first_buffer_length;
1410 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1411
1412 tx->frame_data0 = (first_buffer_length &
1413 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1414 TX_DESC_DATA0_DTYPE_DATA_ |
1415 TX_DESC_DATA0_FS_ |
1416 TX_DESC_DATA0_FCS_;
1417 if (time_stamp)
1418 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1419
1420 if (check_sum)
1421 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1422 TX_DESC_DATA0_IPE_ |
1423 TX_DESC_DATA0_TPE_;
1424
1425 /* data0 will be programmed in one of other frame assembler functions */
1426 return 0;
1427}
1428
1429static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1430 unsigned int frame_length,
1431 int nr_frags)
1432{
1433 /* called only from within lan743x_tx_xmit_frame.
1434 * assuming tx->ring_lock has already been acquired.
1435 */
1436 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1437 struct lan743x_tx_buffer_info *buffer_info = NULL;
1438
1439 /* wrap up previous descriptor */
1440 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1441 if (nr_frags <= 0) {
1442 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1443 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1444 }
1445 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1446 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1447
1448 /* move to next descriptor */
1449 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1450 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1451 buffer_info = &tx->buffer_info[tx->frame_tail];
1452
1453 /* add extension descriptor */
1454 tx_descriptor->data1 = 0;
1455 tx_descriptor->data2 = 0;
1456 tx_descriptor->data3 = 0;
1457
1458 buffer_info->skb = NULL;
1459 buffer_info->dma_ptr = 0;
1460 buffer_info->buffer_length = 0;
1461 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1462
1463 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1464 TX_DESC_DATA0_DTYPE_EXT_ |
1465 TX_DESC_DATA0_EXT_LSO_;
1466
1467 /* data0 will be programmed in one of other frame assembler functions */
1468}
1469
1470static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1471 const skb_frag_t *fragment,
1472 unsigned int frame_length)
1473{
1474 /* called only from within lan743x_tx_xmit_frame
1475 * assuming tx->ring_lock has already been acquired
1476 */
1477 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1478 struct lan743x_tx_buffer_info *buffer_info = NULL;
1479 struct lan743x_adapter *adapter = tx->adapter;
1480 struct device *dev = &adapter->pdev->dev;
1481 unsigned int fragment_length = 0;
1482 dma_addr_t dma_ptr;
1483
1484 fragment_length = skb_frag_size(fragment);
1485 if (!fragment_length)
1486 return 0;
1487
1488 /* wrap up previous descriptor */
1489 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1490 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1491
1492 /* move to next descriptor */
1493 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1494 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1495 buffer_info = &tx->buffer_info[tx->frame_tail];
1496 dma_ptr = skb_frag_dma_map(dev, fragment,
1497 0, fragment_length,
1498 DMA_TO_DEVICE);
1499 if (dma_mapping_error(dev, dma_ptr)) {
1500 int desc_index;
1501
1502 /* cleanup all previously setup descriptors */
1503 desc_index = tx->frame_first;
1504 while (desc_index != tx->frame_tail) {
1505 lan743x_tx_release_desc(tx, desc_index, true);
1506 desc_index = lan743x_tx_next_index(tx, desc_index);
1507 }
1508 dma_wmb();
1509 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1510 tx->frame_first = 0;
1511 tx->frame_data0 = 0;
1512 tx->frame_tail = 0;
1513 return -ENOMEM;
1514 }
1515
1516 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1517 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1518 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1519 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1520
1521 buffer_info->skb = NULL;
1522 buffer_info->dma_ptr = dma_ptr;
1523 buffer_info->buffer_length = fragment_length;
1524 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1525 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1526
1527 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1528 TX_DESC_DATA0_DTYPE_DATA_ |
1529 TX_DESC_DATA0_FCS_;
1530
1531 /* data0 will be programmed in one of other frame assembler functions */
1532 return 0;
1533}
1534
1535static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1536 struct sk_buff *skb,
1537 bool time_stamp,
1538 bool ignore_sync)
1539{
1540 /* called only from within lan743x_tx_xmit_frame
1541 * assuming tx->ring_lock has already been acquired
1542 */
1543 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1544 struct lan743x_tx_buffer_info *buffer_info = NULL;
1545 struct lan743x_adapter *adapter = tx->adapter;
1546 u32 tx_tail_flags = 0;
1547
1548 /* wrap up previous descriptor */
1549 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1550 TX_DESC_DATA0_DTYPE_DATA_) {
1551 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1552 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1553 }
1554
1555 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1556 buffer_info = &tx->buffer_info[tx->frame_tail];
1557 buffer_info->skb = skb;
1558 if (time_stamp)
1559 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1560 if (ignore_sync)
1561 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1562
1563 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1564 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1565 tx->last_tail = tx->frame_tail;
1566
1567 dma_wmb();
1568
1569 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1570 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1571 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1572 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1573 TX_TAIL_SET_TOP_INT_EN_;
1574
1575 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1576 tx_tail_flags | tx->frame_tail);
1577 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1578}
1579
1580static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1581 struct sk_buff *skb)
1582{
1583 int required_number_of_descriptors = 0;
1584 unsigned int start_frame_length = 0;
1585 unsigned int frame_length = 0;
1586 unsigned int head_length = 0;
1587 unsigned long irq_flags = 0;
1588 bool do_timestamp = false;
1589 bool ignore_sync = false;
1590 int nr_frags = 0;
1591 bool gso = false;
1592 int j;
1593
1594 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1595
1596 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1597 if (required_number_of_descriptors >
1598 lan743x_tx_get_avail_desc(tx)) {
1599 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1600 dev_kfree_skb_irq(skb);
1601 } else {
1602 /* save to overflow buffer */
1603 tx->overflow_skb = skb;
1604 netif_stop_queue(tx->adapter->netdev);
1605 }
1606 goto unlock;
1607 }
1608
1609 /* space available, transmit skb */
1610 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1611 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1612 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1613 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1614 do_timestamp = true;
1615 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1616 ignore_sync = true;
1617 }
1618 head_length = skb_headlen(skb);
1619 frame_length = skb_pagelen(skb);
1620 nr_frags = skb_shinfo(skb)->nr_frags;
1621 start_frame_length = frame_length;
1622 gso = skb_is_gso(skb);
1623 if (gso) {
1624 start_frame_length = max(skb_shinfo(skb)->gso_size,
1625 (unsigned short)8);
1626 }
1627
1628 if (lan743x_tx_frame_start(tx,
1629 skb->data, head_length,
1630 start_frame_length,
1631 do_timestamp,
1632 skb->ip_summed == CHECKSUM_PARTIAL)) {
1633 dev_kfree_skb_irq(skb);
1634 goto unlock;
1635 }
1636
1637 if (gso)
1638 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1639
1640 if (nr_frags <= 0)
1641 goto finish;
1642
1643 for (j = 0; j < nr_frags; j++) {
1644 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1645
1646 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1647 /* upon error no need to call
1648 * lan743x_tx_frame_end
1649 * frame assembler clean up was performed inside
1650 * lan743x_tx_frame_add_fragment
1651 */
1652 dev_kfree_skb_irq(skb);
1653 goto unlock;
1654 }
1655 }
1656
1657finish:
1658 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1659
1660unlock:
1661 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1662 return NETDEV_TX_OK;
1663}
1664
1665static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1666{
1667 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1668 struct lan743x_adapter *adapter = tx->adapter;
1669 bool start_transmitter = false;
1670 unsigned long irq_flags = 0;
1671 u32 ioc_bit = 0;
1672
1673 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1674 lan743x_csr_read(adapter, DMAC_INT_STS);
1675 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1676 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1677 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1678
1679 /* clean up tx ring */
1680 lan743x_tx_release_completed_descriptors(tx);
1681 if (netif_queue_stopped(adapter->netdev)) {
1682 if (tx->overflow_skb) {
1683 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1684 lan743x_tx_get_avail_desc(tx))
1685 start_transmitter = true;
1686 } else {
1687 netif_wake_queue(adapter->netdev);
1688 }
1689 }
1690 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1691
1692 if (start_transmitter) {
1693 /* space is now available, transmit overflow skb */
1694 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1695 tx->overflow_skb = NULL;
1696 netif_wake_queue(adapter->netdev);
1697 }
1698
1699 if (!napi_complete(napi))
1700 goto done;
1701
1702 /* enable isr */
1703 lan743x_csr_write(adapter, INT_EN_SET,
1704 INT_BIT_DMA_TX_(tx->channel_number));
1705 lan743x_csr_read(adapter, INT_STS);
1706
1707done:
1708 return 0;
1709}
1710
1711static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1712{
1713 if (tx->head_cpu_ptr) {
1714 dma_free_coherent(&tx->adapter->pdev->dev,
1715 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1716 tx->head_dma_ptr);
1717 tx->head_cpu_ptr = NULL;
1718 tx->head_dma_ptr = 0;
1719 }
1720 kfree(tx->buffer_info);
1721 tx->buffer_info = NULL;
1722
1723 if (tx->ring_cpu_ptr) {
1724 dma_free_coherent(&tx->adapter->pdev->dev,
1725 tx->ring_allocation_size, tx->ring_cpu_ptr,
1726 tx->ring_dma_ptr);
1727 tx->ring_allocation_size = 0;
1728 tx->ring_cpu_ptr = NULL;
1729 tx->ring_dma_ptr = 0;
1730 }
1731 tx->ring_size = 0;
1732}
1733
1734static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1735{
1736 size_t ring_allocation_size = 0;
1737 void *cpu_ptr = NULL;
1738 dma_addr_t dma_ptr;
1739 int ret = -ENOMEM;
1740
1741 tx->ring_size = LAN743X_TX_RING_SIZE;
1742 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1743 ret = -EINVAL;
1744 goto cleanup;
1745 }
1746 ring_allocation_size = ALIGN(tx->ring_size *
1747 sizeof(struct lan743x_tx_descriptor),
1748 PAGE_SIZE);
1749 dma_ptr = 0;
1750 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1751 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1752 if (!cpu_ptr) {
1753 ret = -ENOMEM;
1754 goto cleanup;
1755 }
1756
1757 tx->ring_allocation_size = ring_allocation_size;
1758 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1759 tx->ring_dma_ptr = dma_ptr;
1760
1761 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1762 if (!cpu_ptr) {
1763 ret = -ENOMEM;
1764 goto cleanup;
1765 }
1766 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1767 dma_ptr = 0;
1768 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1769 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1770 GFP_KERNEL);
1771 if (!cpu_ptr) {
1772 ret = -ENOMEM;
1773 goto cleanup;
1774 }
1775
1776 tx->head_cpu_ptr = cpu_ptr;
1777 tx->head_dma_ptr = dma_ptr;
1778 if (tx->head_dma_ptr & 0x3) {
1779 ret = -ENOMEM;
1780 goto cleanup;
1781 }
1782
1783 return 0;
1784
1785cleanup:
1786 lan743x_tx_ring_cleanup(tx);
1787 return ret;
1788}
1789
1790static void lan743x_tx_close(struct lan743x_tx *tx)
1791{
1792 struct lan743x_adapter *adapter = tx->adapter;
1793
1794 lan743x_csr_write(adapter,
1795 DMAC_CMD,
1796 DMAC_CMD_STOP_T_(tx->channel_number));
1797 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1798
1799 lan743x_csr_write(adapter,
1800 DMAC_INT_EN_CLR,
1801 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1802 lan743x_csr_write(adapter, INT_EN_CLR,
1803 INT_BIT_DMA_TX_(tx->channel_number));
1804 napi_disable(&tx->napi);
1805 netif_napi_del(&tx->napi);
1806
1807 lan743x_csr_write(adapter, FCT_TX_CTL,
1808 FCT_TX_CTL_DIS_(tx->channel_number));
1809 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1810 FCT_TX_CTL_EN_(tx->channel_number),
1811 0, 1000, 20000, 100);
1812
1813 lan743x_tx_release_all_descriptors(tx);
1814
1815 if (tx->overflow_skb) {
1816 dev_kfree_skb(tx->overflow_skb);
1817 tx->overflow_skb = NULL;
1818 }
1819
1820 lan743x_tx_ring_cleanup(tx);
1821}
1822
1823static int lan743x_tx_open(struct lan743x_tx *tx)
1824{
1825 struct lan743x_adapter *adapter = NULL;
1826 u32 data = 0;
1827 int ret;
1828
1829 adapter = tx->adapter;
1830 ret = lan743x_tx_ring_init(tx);
1831 if (ret)
1832 return ret;
1833
1834 /* initialize fifo */
1835 lan743x_csr_write(adapter, FCT_TX_CTL,
1836 FCT_TX_CTL_RESET_(tx->channel_number));
1837 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1838 FCT_TX_CTL_RESET_(tx->channel_number),
1839 0, 1000, 20000, 100);
1840
1841 /* enable fifo */
1842 lan743x_csr_write(adapter, FCT_TX_CTL,
1843 FCT_TX_CTL_EN_(tx->channel_number));
1844
1845 /* reset tx channel */
1846 lan743x_csr_write(adapter, DMAC_CMD,
1847 DMAC_CMD_TX_SWR_(tx->channel_number));
1848 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1849 DMAC_CMD_TX_SWR_(tx->channel_number),
1850 0, 1000, 20000, 100);
1851
1852 /* Write TX_BASE_ADDR */
1853 lan743x_csr_write(adapter,
1854 TX_BASE_ADDRH(tx->channel_number),
1855 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1856 lan743x_csr_write(adapter,
1857 TX_BASE_ADDRL(tx->channel_number),
1858 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1859
1860 /* Write TX_CFG_B */
1861 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1862 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1863 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1864 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1865 data |= TX_CFG_B_TDMABL_512_;
1866 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1867
1868 /* Write TX_CFG_A */
1869 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1870 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1871 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1872 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1873 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1874 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1875 }
1876 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1877
1878 /* Write TX_HEAD_WRITEBACK_ADDR */
1879 lan743x_csr_write(adapter,
1880 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1881 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1882 lan743x_csr_write(adapter,
1883 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1884 DMA_ADDR_LOW32(tx->head_dma_ptr));
1885
1886 /* set last head */
1887 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1888
1889 /* write TX_TAIL */
1890 tx->last_tail = 0;
1891 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1892 (u32)(tx->last_tail));
1893 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1894 INT_BIT_DMA_TX_
1895 (tx->channel_number));
1896 netif_tx_napi_add(adapter->netdev,
1897 &tx->napi, lan743x_tx_napi_poll,
1898 tx->ring_size - 1);
1899 napi_enable(&tx->napi);
1900
1901 data = 0;
1902 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1903 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1904 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1905 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1906 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1907 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1908 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1909 data |= TX_CFG_C_TX_INT_EN_R2C_;
1910 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1911
1912 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1913 lan743x_csr_write(adapter, INT_EN_SET,
1914 INT_BIT_DMA_TX_(tx->channel_number));
1915 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1916 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1917
1918 /* start dmac channel */
1919 lan743x_csr_write(adapter, DMAC_CMD,
1920 DMAC_CMD_START_T_(tx->channel_number));
1921 return 0;
1922}
1923
1924static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1925{
1926 return ((++index) % rx->ring_size);
1927}
1928
1929static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
1930{
1931 /* update the tail once per 8 descriptors */
1932 if ((index & 7) == 7)
1933 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
1934 index);
1935}
1936
1937static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index)
1938{
1939 struct net_device *netdev = rx->adapter->netdev;
1940 struct device *dev = &rx->adapter->pdev->dev;
1941 struct lan743x_rx_buffer_info *buffer_info;
1942 unsigned int buffer_length, used_length;
1943 struct lan743x_rx_descriptor *descriptor;
1944 struct sk_buff *skb;
1945 dma_addr_t dma_ptr;
1946
1947 buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
1948
1949 descriptor = &rx->ring_cpu_ptr[index];
1950 buffer_info = &rx->buffer_info[index];
1951 skb = __netdev_alloc_skb(netdev, buffer_length, GFP_ATOMIC | GFP_DMA);
1952 if (!skb)
1953 return -ENOMEM;
1954 dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
1955 if (dma_mapping_error(dev, dma_ptr)) {
1956 dev_kfree_skb_any(skb);
1957 return -ENOMEM;
1958 }
1959 if (buffer_info->dma_ptr) {
1960 /* sync used area of buffer only */
1961 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
1962 /* frame length is valid only if LS bit is set.
1963 * it's a safe upper bound for the used area in this
1964 * buffer.
1965 */
1966 used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
1967 (le32_to_cpu(descriptor->data0)),
1968 buffer_info->buffer_length);
1969 else
1970 used_length = buffer_info->buffer_length;
1971 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
1972 used_length,
1973 DMA_FROM_DEVICE);
1974 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
1975 buffer_info->buffer_length,
1976 DMA_FROM_DEVICE,
1977 DMA_ATTR_SKIP_CPU_SYNC);
1978 }
1979
1980 buffer_info->skb = skb;
1981 buffer_info->dma_ptr = dma_ptr;
1982 buffer_info->buffer_length = buffer_length;
1983 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
1984 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
1985 descriptor->data3 = 0;
1986 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
1987 (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
1988 lan743x_rx_update_tail(rx, index);
1989
1990 return 0;
1991}
1992
1993static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1994{
1995 struct lan743x_rx_buffer_info *buffer_info;
1996 struct lan743x_rx_descriptor *descriptor;
1997
1998 descriptor = &rx->ring_cpu_ptr[index];
1999 buffer_info = &rx->buffer_info[index];
2000
2001 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2002 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2003 descriptor->data3 = 0;
2004 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2005 ((buffer_info->buffer_length) &
2006 RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2007 lan743x_rx_update_tail(rx, index);
2008}
2009
2010static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2011{
2012 struct lan743x_rx_buffer_info *buffer_info;
2013 struct lan743x_rx_descriptor *descriptor;
2014
2015 descriptor = &rx->ring_cpu_ptr[index];
2016 buffer_info = &rx->buffer_info[index];
2017
2018 memset(descriptor, 0, sizeof(*descriptor));
2019
2020 if (buffer_info->dma_ptr) {
2021 dma_unmap_single(&rx->adapter->pdev->dev,
2022 buffer_info->dma_ptr,
2023 buffer_info->buffer_length,
2024 DMA_FROM_DEVICE);
2025 buffer_info->dma_ptr = 0;
2026 }
2027
2028 if (buffer_info->skb) {
2029 dev_kfree_skb(buffer_info->skb);
2030 buffer_info->skb = NULL;
2031 }
2032
2033 memset(buffer_info, 0, sizeof(*buffer_info));
2034}
2035
2036static struct sk_buff *
2037lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2038{
2039 if (skb_linearize(skb)) {
2040 dev_kfree_skb_irq(skb);
2041 return NULL;
2042 }
2043 frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2044 if (skb->len > frame_length) {
2045 skb->tail -= skb->len - frame_length;
2046 skb->len = frame_length;
2047 }
2048 return skb;
2049}
2050
2051static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2052{
2053 int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2054 struct lan743x_rx_descriptor *descriptor, *desc_ext;
2055 struct net_device *netdev = rx->adapter->netdev;
2056 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2057 struct lan743x_rx_buffer_info *buffer_info;
2058 int frame_length, buffer_length;
2059 int extension_index = -1;
2060 bool is_last, is_first;
2061 struct sk_buff *skb;
2062
2063 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2064 goto done;
2065
2066 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2067 goto done;
2068
2069 if (rx->last_head == current_head_index)
2070 goto done;
2071
2072 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2073 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2074 goto done;
2075 buffer_info = &rx->buffer_info[rx->last_head];
2076
2077 is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2078 is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2079
2080 if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2081 /* extension is expected to follow */
2082 int index = lan743x_rx_next_index(rx, rx->last_head);
2083
2084 if (index == current_head_index)
2085 /* extension not yet available */
2086 goto done;
2087 desc_ext = &rx->ring_cpu_ptr[index];
2088 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2089 /* extension not yet available */
2090 goto done;
2091 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2092 goto move_forward;
2093 extension_index = index;
2094 }
2095
2096 /* Only the last buffer in a multi-buffer frame contains the total frame
2097 * length. The chip occasionally sends more buffers than strictly
2098 * required to reach the total frame length.
2099 * Handle this by adding all buffers to the skb in their entirety.
2100 * Once the real frame length is known, trim the skb.
2101 */
2102 frame_length =
2103 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2104 buffer_length = buffer_info->buffer_length;
2105
2106 netdev_dbg(netdev, "%s%schunk: %d/%d",
2107 is_first ? "first " : " ",
2108 is_last ? "last " : " ",
2109 frame_length, buffer_length);
2110
2111 /* save existing skb, allocate new skb and map to dma */
2112 skb = buffer_info->skb;
2113 if (lan743x_rx_init_ring_element(rx, rx->last_head)) {
2114 /* failed to allocate next skb.
2115 * Memory is very low.
2116 * Drop this packet and reuse buffer.
2117 */
2118 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2119 /* drop packet that was being assembled */
2120 dev_kfree_skb_irq(rx->skb_head);
2121 rx->skb_head = NULL;
2122 goto process_extension;
2123 }
2124
2125 /* add buffers to skb via skb->frag_list */
2126 if (is_first) {
2127 skb_reserve(skb, RX_HEAD_PADDING);
2128 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2129 if (rx->skb_head)
2130 dev_kfree_skb_irq(rx->skb_head);
2131 rx->skb_head = skb;
2132 } else if (rx->skb_head) {
2133 skb_put(skb, buffer_length);
2134 if (skb_shinfo(rx->skb_head)->frag_list)
2135 rx->skb_tail->next = skb;
2136 else
2137 skb_shinfo(rx->skb_head)->frag_list = skb;
2138 rx->skb_tail = skb;
2139 rx->skb_head->len += skb->len;
2140 rx->skb_head->data_len += skb->len;
2141 rx->skb_head->truesize += skb->truesize;
2142 } else {
2143 /* packet to assemble has already been dropped because one or
2144 * more of its buffers could not be allocated
2145 */
2146 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2147 dev_kfree_skb_irq(skb);
2148 }
2149
2150process_extension:
2151 if (extension_index >= 0) {
2152 u32 ts_sec;
2153 u32 ts_nsec;
2154
2155 ts_sec = le32_to_cpu(desc_ext->data1);
2156 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2157 RX_DESC_DATA2_TS_NS_MASK_);
2158 if (rx->skb_head)
2159 skb_hwtstamps(rx->skb_head)->hwtstamp =
2160 ktime_set(ts_sec, ts_nsec);
2161 lan743x_rx_reuse_ring_element(rx, extension_index);
2162 rx->last_head = extension_index;
2163 netdev_dbg(netdev, "process extension");
2164 }
2165
2166 if (is_last && rx->skb_head)
2167 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2168
2169 if (is_last && rx->skb_head) {
2170 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2171 rx->adapter->netdev);
2172 netdev_dbg(netdev, "sending %d byte frame to OS",
2173 rx->skb_head->len);
2174 napi_gro_receive(&rx->napi, rx->skb_head);
2175 rx->skb_head = NULL;
2176 }
2177
2178move_forward:
2179 /* push tail and head forward */
2180 rx->last_tail = rx->last_head;
2181 rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2182 result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2183done:
2184 return result;
2185}
2186
2187static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2188{
2189 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2190 struct lan743x_adapter *adapter = rx->adapter;
2191 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2192 u32 rx_tail_flags = 0;
2193 int count;
2194
2195 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2196 /* clear int status bit before reading packet */
2197 lan743x_csr_write(adapter, DMAC_INT_STS,
2198 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2199 }
2200 for (count = 0; count < weight; count++) {
2201 result = lan743x_rx_process_buffer(rx);
2202 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2203 break;
2204 }
2205 rx->frame_count += count;
2206 if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2207 return weight;
2208
2209 if (!napi_complete_done(napi, count))
2210 return count;
2211
2212 /* re-arm interrupts, must write to rx tail on some chip variants */
2213 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2214 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2215 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2216 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2217 } else {
2218 lan743x_csr_write(adapter, INT_EN_SET,
2219 INT_BIT_DMA_RX_(rx->channel_number));
2220 }
2221
2222 if (rx_tail_flags)
2223 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2224 rx_tail_flags | rx->last_tail);
2225
2226 return count;
2227}
2228
2229static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2230{
2231 if (rx->buffer_info && rx->ring_cpu_ptr) {
2232 int index;
2233
2234 for (index = 0; index < rx->ring_size; index++)
2235 lan743x_rx_release_ring_element(rx, index);
2236 }
2237
2238 if (rx->head_cpu_ptr) {
2239 dma_free_coherent(&rx->adapter->pdev->dev,
2240 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2241 rx->head_dma_ptr);
2242 rx->head_cpu_ptr = NULL;
2243 rx->head_dma_ptr = 0;
2244 }
2245
2246 kfree(rx->buffer_info);
2247 rx->buffer_info = NULL;
2248
2249 if (rx->ring_cpu_ptr) {
2250 dma_free_coherent(&rx->adapter->pdev->dev,
2251 rx->ring_allocation_size, rx->ring_cpu_ptr,
2252 rx->ring_dma_ptr);
2253 rx->ring_allocation_size = 0;
2254 rx->ring_cpu_ptr = NULL;
2255 rx->ring_dma_ptr = 0;
2256 }
2257
2258 rx->ring_size = 0;
2259 rx->last_head = 0;
2260}
2261
2262static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2263{
2264 size_t ring_allocation_size = 0;
2265 dma_addr_t dma_ptr = 0;
2266 void *cpu_ptr = NULL;
2267 int ret = -ENOMEM;
2268 int index = 0;
2269
2270 rx->ring_size = LAN743X_RX_RING_SIZE;
2271 if (rx->ring_size <= 1) {
2272 ret = -EINVAL;
2273 goto cleanup;
2274 }
2275 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2276 ret = -EINVAL;
2277 goto cleanup;
2278 }
2279 ring_allocation_size = ALIGN(rx->ring_size *
2280 sizeof(struct lan743x_rx_descriptor),
2281 PAGE_SIZE);
2282 dma_ptr = 0;
2283 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2284 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2285 if (!cpu_ptr) {
2286 ret = -ENOMEM;
2287 goto cleanup;
2288 }
2289 rx->ring_allocation_size = ring_allocation_size;
2290 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2291 rx->ring_dma_ptr = dma_ptr;
2292
2293 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2294 GFP_KERNEL);
2295 if (!cpu_ptr) {
2296 ret = -ENOMEM;
2297 goto cleanup;
2298 }
2299 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2300 dma_ptr = 0;
2301 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2302 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2303 GFP_KERNEL);
2304 if (!cpu_ptr) {
2305 ret = -ENOMEM;
2306 goto cleanup;
2307 }
2308
2309 rx->head_cpu_ptr = cpu_ptr;
2310 rx->head_dma_ptr = dma_ptr;
2311 if (rx->head_dma_ptr & 0x3) {
2312 ret = -ENOMEM;
2313 goto cleanup;
2314 }
2315
2316 rx->last_head = 0;
2317 for (index = 0; index < rx->ring_size; index++) {
2318 ret = lan743x_rx_init_ring_element(rx, index);
2319 if (ret)
2320 goto cleanup;
2321 }
2322 return 0;
2323
2324cleanup:
2325 lan743x_rx_ring_cleanup(rx);
2326 return ret;
2327}
2328
2329static void lan743x_rx_close(struct lan743x_rx *rx)
2330{
2331 struct lan743x_adapter *adapter = rx->adapter;
2332
2333 lan743x_csr_write(adapter, FCT_RX_CTL,
2334 FCT_RX_CTL_DIS_(rx->channel_number));
2335 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2336 FCT_RX_CTL_EN_(rx->channel_number),
2337 0, 1000, 20000, 100);
2338
2339 lan743x_csr_write(adapter, DMAC_CMD,
2340 DMAC_CMD_STOP_R_(rx->channel_number));
2341 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2342
2343 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2344 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2345 lan743x_csr_write(adapter, INT_EN_CLR,
2346 INT_BIT_DMA_RX_(rx->channel_number));
2347 napi_disable(&rx->napi);
2348
2349 netif_napi_del(&rx->napi);
2350
2351 lan743x_rx_ring_cleanup(rx);
2352}
2353
2354static int lan743x_rx_open(struct lan743x_rx *rx)
2355{
2356 struct lan743x_adapter *adapter = rx->adapter;
2357 u32 data = 0;
2358 int ret;
2359
2360 rx->frame_count = 0;
2361 ret = lan743x_rx_ring_init(rx);
2362 if (ret)
2363 goto return_error;
2364
2365 netif_napi_add(adapter->netdev,
2366 &rx->napi, lan743x_rx_napi_poll,
2367 NAPI_POLL_WEIGHT);
2368
2369 lan743x_csr_write(adapter, DMAC_CMD,
2370 DMAC_CMD_RX_SWR_(rx->channel_number));
2371 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2372 DMAC_CMD_RX_SWR_(rx->channel_number),
2373 0, 1000, 20000, 100);
2374
2375 /* set ring base address */
2376 lan743x_csr_write(adapter,
2377 RX_BASE_ADDRH(rx->channel_number),
2378 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2379 lan743x_csr_write(adapter,
2380 RX_BASE_ADDRL(rx->channel_number),
2381 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2382
2383 /* set rx write back address */
2384 lan743x_csr_write(adapter,
2385 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2386 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2387 lan743x_csr_write(adapter,
2388 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2389 DMA_ADDR_LOW32(rx->head_dma_ptr));
2390 data = RX_CFG_A_RX_HP_WB_EN_;
2391 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2392 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2393 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2394 RX_CFG_A_RX_PF_THRES_SET_(16) |
2395 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2396 }
2397
2398 /* set RX_CFG_A */
2399 lan743x_csr_write(adapter,
2400 RX_CFG_A(rx->channel_number), data);
2401
2402 /* set RX_CFG_B */
2403 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2404 data &= ~RX_CFG_B_RX_PAD_MASK_;
2405 if (!RX_HEAD_PADDING)
2406 data |= RX_CFG_B_RX_PAD_0_;
2407 else
2408 data |= RX_CFG_B_RX_PAD_2_;
2409 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2410 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2411 data |= RX_CFG_B_TS_ALL_RX_;
2412 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2413 data |= RX_CFG_B_RDMABL_512_;
2414
2415 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2416 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2417 INT_BIT_DMA_RX_
2418 (rx->channel_number));
2419
2420 /* set RX_CFG_C */
2421 data = 0;
2422 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2423 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2424 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2425 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2426 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2427 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2428 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2429 data |= RX_CFG_C_RX_INT_EN_R2C_;
2430 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2431
2432 rx->last_tail = ((u32)(rx->ring_size - 1));
2433 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2434 rx->last_tail);
2435 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2436 if (rx->last_head) {
2437 ret = -EIO;
2438 goto napi_delete;
2439 }
2440
2441 napi_enable(&rx->napi);
2442
2443 lan743x_csr_write(adapter, INT_EN_SET,
2444 INT_BIT_DMA_RX_(rx->channel_number));
2445 lan743x_csr_write(adapter, DMAC_INT_STS,
2446 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2447 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2448 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2449 lan743x_csr_write(adapter, DMAC_CMD,
2450 DMAC_CMD_START_R_(rx->channel_number));
2451
2452 /* initialize fifo */
2453 lan743x_csr_write(adapter, FCT_RX_CTL,
2454 FCT_RX_CTL_RESET_(rx->channel_number));
2455 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2456 FCT_RX_CTL_RESET_(rx->channel_number),
2457 0, 1000, 20000, 100);
2458 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2459 FCT_FLOW_CTL_REQ_EN_ |
2460 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2461 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2462
2463 /* enable fifo */
2464 lan743x_csr_write(adapter, FCT_RX_CTL,
2465 FCT_RX_CTL_EN_(rx->channel_number));
2466 return 0;
2467
2468napi_delete:
2469 netif_napi_del(&rx->napi);
2470 lan743x_rx_ring_cleanup(rx);
2471
2472return_error:
2473 return ret;
2474}
2475
2476static int lan743x_netdev_close(struct net_device *netdev)
2477{
2478 struct lan743x_adapter *adapter = netdev_priv(netdev);
2479 int index;
2480
2481 lan743x_tx_close(&adapter->tx[0]);
2482
2483 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2484 lan743x_rx_close(&adapter->rx[index]);
2485
2486 lan743x_ptp_close(adapter);
2487
2488 lan743x_phy_close(adapter);
2489
2490 lan743x_mac_close(adapter);
2491
2492 lan743x_intr_close(adapter);
2493
2494 return 0;
2495}
2496
2497static int lan743x_netdev_open(struct net_device *netdev)
2498{
2499 struct lan743x_adapter *adapter = netdev_priv(netdev);
2500 int index;
2501 int ret;
2502
2503 ret = lan743x_intr_open(adapter);
2504 if (ret)
2505 goto return_error;
2506
2507 ret = lan743x_mac_open(adapter);
2508 if (ret)
2509 goto close_intr;
2510
2511 ret = lan743x_phy_open(adapter);
2512 if (ret)
2513 goto close_mac;
2514
2515 ret = lan743x_ptp_open(adapter);
2516 if (ret)
2517 goto close_phy;
2518
2519 lan743x_rfe_open(adapter);
2520
2521 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2522 ret = lan743x_rx_open(&adapter->rx[index]);
2523 if (ret)
2524 goto close_rx;
2525 }
2526
2527 ret = lan743x_tx_open(&adapter->tx[0]);
2528 if (ret)
2529 goto close_rx;
2530
2531 return 0;
2532
2533close_rx:
2534 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2535 if (adapter->rx[index].ring_cpu_ptr)
2536 lan743x_rx_close(&adapter->rx[index]);
2537 }
2538 lan743x_ptp_close(adapter);
2539
2540close_phy:
2541 lan743x_phy_close(adapter);
2542
2543close_mac:
2544 lan743x_mac_close(adapter);
2545
2546close_intr:
2547 lan743x_intr_close(adapter);
2548
2549return_error:
2550 netif_warn(adapter, ifup, adapter->netdev,
2551 "Error opening LAN743x\n");
2552 return ret;
2553}
2554
2555static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2556 struct net_device *netdev)
2557{
2558 struct lan743x_adapter *adapter = netdev_priv(netdev);
2559
2560 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2561}
2562
2563static int lan743x_netdev_ioctl(struct net_device *netdev,
2564 struct ifreq *ifr, int cmd)
2565{
2566 if (!netif_running(netdev))
2567 return -EINVAL;
2568 if (cmd == SIOCSHWTSTAMP)
2569 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2570 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2571}
2572
2573static void lan743x_netdev_set_multicast(struct net_device *netdev)
2574{
2575 struct lan743x_adapter *adapter = netdev_priv(netdev);
2576
2577 lan743x_rfe_set_multicast(adapter);
2578}
2579
2580static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2581{
2582 struct lan743x_adapter *adapter = netdev_priv(netdev);
2583 int ret = 0;
2584
2585 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2586 if (!ret)
2587 netdev->mtu = new_mtu;
2588 return ret;
2589}
2590
2591static void lan743x_netdev_get_stats64(struct net_device *netdev,
2592 struct rtnl_link_stats64 *stats)
2593{
2594 struct lan743x_adapter *adapter = netdev_priv(netdev);
2595
2596 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2597 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2598 stats->rx_bytes = lan743x_csr_read(adapter,
2599 STAT_RX_UNICAST_BYTE_COUNT) +
2600 lan743x_csr_read(adapter,
2601 STAT_RX_BROADCAST_BYTE_COUNT) +
2602 lan743x_csr_read(adapter,
2603 STAT_RX_MULTICAST_BYTE_COUNT);
2604 stats->tx_bytes = lan743x_csr_read(adapter,
2605 STAT_TX_UNICAST_BYTE_COUNT) +
2606 lan743x_csr_read(adapter,
2607 STAT_TX_BROADCAST_BYTE_COUNT) +
2608 lan743x_csr_read(adapter,
2609 STAT_TX_MULTICAST_BYTE_COUNT);
2610 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2611 lan743x_csr_read(adapter,
2612 STAT_RX_ALIGNMENT_ERRORS) +
2613 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2614 lan743x_csr_read(adapter,
2615 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2616 lan743x_csr_read(adapter,
2617 STAT_RX_OVERSIZE_FRAME_ERRORS);
2618 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2619 lan743x_csr_read(adapter,
2620 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2621 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2622 stats->rx_dropped = lan743x_csr_read(adapter,
2623 STAT_RX_DROPPED_FRAMES);
2624 stats->tx_dropped = lan743x_csr_read(adapter,
2625 STAT_TX_EXCESSIVE_COLLISION);
2626 stats->multicast = lan743x_csr_read(adapter,
2627 STAT_RX_MULTICAST_FRAMES) +
2628 lan743x_csr_read(adapter,
2629 STAT_TX_MULTICAST_FRAMES);
2630 stats->collisions = lan743x_csr_read(adapter,
2631 STAT_TX_SINGLE_COLLISIONS) +
2632 lan743x_csr_read(adapter,
2633 STAT_TX_MULTIPLE_COLLISIONS) +
2634 lan743x_csr_read(adapter,
2635 STAT_TX_LATE_COLLISIONS);
2636}
2637
2638static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2639 void *addr)
2640{
2641 struct lan743x_adapter *adapter = netdev_priv(netdev);
2642 struct sockaddr *sock_addr = addr;
2643 int ret;
2644
2645 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2646 if (ret)
2647 return ret;
2648 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2649 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2650 lan743x_rfe_update_mac_address(adapter);
2651 return 0;
2652}
2653
2654static const struct net_device_ops lan743x_netdev_ops = {
2655 .ndo_open = lan743x_netdev_open,
2656 .ndo_stop = lan743x_netdev_close,
2657 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2658 .ndo_do_ioctl = lan743x_netdev_ioctl,
2659 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2660 .ndo_change_mtu = lan743x_netdev_change_mtu,
2661 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2662 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2663};
2664
2665static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2666{
2667 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2668}
2669
2670static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2671{
2672 mdiobus_unregister(adapter->mdiobus);
2673}
2674
2675static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2676{
2677 unregister_netdev(adapter->netdev);
2678
2679 lan743x_mdiobus_cleanup(adapter);
2680 lan743x_hardware_cleanup(adapter);
2681 lan743x_pci_cleanup(adapter);
2682}
2683
2684static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2685 struct pci_dev *pdev)
2686{
2687 struct lan743x_tx *tx;
2688 int index;
2689 int ret;
2690
2691 adapter->intr.irq = adapter->pdev->irq;
2692 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2693
2694 ret = lan743x_gpio_init(adapter);
2695 if (ret)
2696 return ret;
2697
2698 ret = lan743x_mac_init(adapter);
2699 if (ret)
2700 return ret;
2701
2702 ret = lan743x_phy_init(adapter);
2703 if (ret)
2704 return ret;
2705
2706 ret = lan743x_ptp_init(adapter);
2707 if (ret)
2708 return ret;
2709
2710 lan743x_rfe_update_mac_address(adapter);
2711
2712 ret = lan743x_dmac_init(adapter);
2713 if (ret)
2714 return ret;
2715
2716 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2717 adapter->rx[index].adapter = adapter;
2718 adapter->rx[index].channel_number = index;
2719 }
2720
2721 tx = &adapter->tx[0];
2722 tx->adapter = adapter;
2723 tx->channel_number = 0;
2724 spin_lock_init(&tx->ring_lock);
2725 return 0;
2726}
2727
2728static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2729{
2730 int ret;
2731
2732 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2733 if (!(adapter->mdiobus)) {
2734 ret = -ENOMEM;
2735 goto return_error;
2736 }
2737
2738 adapter->mdiobus->priv = (void *)adapter;
2739 adapter->mdiobus->read = lan743x_mdiobus_read;
2740 adapter->mdiobus->write = lan743x_mdiobus_write;
2741 adapter->mdiobus->name = "lan743x-mdiobus";
2742 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2743 "pci-%s", pci_name(adapter->pdev));
2744
2745 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2746 /* LAN7430 uses internal phy at address 1 */
2747 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2748
2749 /* register mdiobus */
2750 ret = mdiobus_register(adapter->mdiobus);
2751 if (ret < 0)
2752 goto return_error;
2753 return 0;
2754
2755return_error:
2756 return ret;
2757}
2758
2759/* lan743x_pcidev_probe - Device Initialization Routine
2760 * @pdev: PCI device information struct
2761 * @id: entry in lan743x_pci_tbl
2762 *
2763 * Returns 0 on success, negative on failure
2764 *
2765 * initializes an adapter identified by a pci_dev structure.
2766 * The OS initialization, configuring of the adapter private structure,
2767 * and a hardware reset occur.
2768 **/
2769static int lan743x_pcidev_probe(struct pci_dev *pdev,
2770 const struct pci_device_id *id)
2771{
2772 struct lan743x_adapter *adapter = NULL;
2773 struct net_device *netdev = NULL;
2774 int ret = -ENODEV;
2775
2776 netdev = devm_alloc_etherdev(&pdev->dev,
2777 sizeof(struct lan743x_adapter));
2778 if (!netdev)
2779 goto return_error;
2780
2781 SET_NETDEV_DEV(netdev, &pdev->dev);
2782 pci_set_drvdata(pdev, netdev);
2783 adapter = netdev_priv(netdev);
2784 adapter->netdev = netdev;
2785 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2786 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2787 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2788 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2789
2790 of_get_mac_address(pdev->dev.of_node, adapter->mac_address);
2791
2792 ret = lan743x_pci_init(adapter, pdev);
2793 if (ret)
2794 goto return_error;
2795
2796 ret = lan743x_csr_init(adapter);
2797 if (ret)
2798 goto cleanup_pci;
2799
2800 ret = lan743x_hardware_init(adapter, pdev);
2801 if (ret)
2802 goto cleanup_pci;
2803
2804 ret = lan743x_mdiobus_init(adapter);
2805 if (ret)
2806 goto cleanup_hardware;
2807
2808 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2809 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2810 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2811 adapter->netdev->hw_features = adapter->netdev->features;
2812
2813 /* carrier off reporting is important to ethtool even BEFORE open */
2814 netif_carrier_off(netdev);
2815
2816 ret = register_netdev(adapter->netdev);
2817 if (ret < 0)
2818 goto cleanup_mdiobus;
2819 return 0;
2820
2821cleanup_mdiobus:
2822 lan743x_mdiobus_cleanup(adapter);
2823
2824cleanup_hardware:
2825 lan743x_hardware_cleanup(adapter);
2826
2827cleanup_pci:
2828 lan743x_pci_cleanup(adapter);
2829
2830return_error:
2831 pr_warn("Initialization failed\n");
2832 return ret;
2833}
2834
2835/**
2836 * lan743x_pcidev_remove - Device Removal Routine
2837 * @pdev: PCI device information struct
2838 *
2839 * this is called by the PCI subsystem to alert the driver
2840 * that it should release a PCI device. This could be caused by a
2841 * Hot-Plug event, or because the driver is going to be removed from
2842 * memory.
2843 **/
2844static void lan743x_pcidev_remove(struct pci_dev *pdev)
2845{
2846 struct net_device *netdev = pci_get_drvdata(pdev);
2847 struct lan743x_adapter *adapter = netdev_priv(netdev);
2848
2849 lan743x_full_cleanup(adapter);
2850}
2851
2852static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2853{
2854 struct net_device *netdev = pci_get_drvdata(pdev);
2855 struct lan743x_adapter *adapter = netdev_priv(netdev);
2856
2857 rtnl_lock();
2858 netif_device_detach(netdev);
2859
2860 /* close netdev when netdev is at running state.
2861 * For instance, it is true when system goes to sleep by pm-suspend
2862 * However, it is false when system goes to sleep by suspend GUI menu
2863 */
2864 if (netif_running(netdev))
2865 lan743x_netdev_close(netdev);
2866 rtnl_unlock();
2867
2868#ifdef CONFIG_PM
2869 pci_save_state(pdev);
2870#endif
2871
2872 /* clean up lan743x portion */
2873 lan743x_hardware_cleanup(adapter);
2874}
2875
2876#ifdef CONFIG_PM_SLEEP
2877static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2878{
2879 return bitrev16(crc16(0xFFFF, buf, len));
2880}
2881
2882static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2883{
2884 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2885 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2886 const u8 arp_type[2] = { 0x08, 0x06 };
2887 int mask_index;
2888 u32 pmtctl;
2889 u32 wucsr;
2890 u32 macrx;
2891 u16 crc;
2892
2893 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2894 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2895
2896 /* clear wake settings */
2897 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2898 pmtctl |= PMT_CTL_WUPS_MASK_;
2899 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2900 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2901 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2902
2903 macrx = lan743x_csr_read(adapter, MAC_RX);
2904
2905 wucsr = 0;
2906 mask_index = 0;
2907
2908 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2909
2910 if (adapter->wolopts & WAKE_PHY) {
2911 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2912 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2913 }
2914 if (adapter->wolopts & WAKE_MAGIC) {
2915 wucsr |= MAC_WUCSR_MPEN_;
2916 macrx |= MAC_RX_RXEN_;
2917 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2918 }
2919 if (adapter->wolopts & WAKE_UCAST) {
2920 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2921 macrx |= MAC_RX_RXEN_;
2922 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2923 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2924 }
2925 if (adapter->wolopts & WAKE_BCAST) {
2926 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2927 macrx |= MAC_RX_RXEN_;
2928 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2929 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2930 }
2931 if (adapter->wolopts & WAKE_MCAST) {
2932 /* IPv4 multicast */
2933 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2934 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2935 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2936 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2937 (crc & MAC_WUF_CFG_CRC16_MASK_));
2938 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2939 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2940 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2941 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2942 mask_index++;
2943
2944 /* IPv6 multicast */
2945 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2946 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2947 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2948 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2949 (crc & MAC_WUF_CFG_CRC16_MASK_));
2950 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2951 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2952 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2953 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2954 mask_index++;
2955
2956 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2957 macrx |= MAC_RX_RXEN_;
2958 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2959 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2960 }
2961 if (adapter->wolopts & WAKE_ARP) {
2962 /* set MAC_WUF_CFG & WUF_MASK
2963 * for packettype (offset 12,13) = ARP (0x0806)
2964 */
2965 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2966 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2967 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2968 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2969 (crc & MAC_WUF_CFG_CRC16_MASK_));
2970 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2971 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2972 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2973 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2974 mask_index++;
2975
2976 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2977 macrx |= MAC_RX_RXEN_;
2978 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2979 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2980 }
2981
2982 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2983 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2984 lan743x_csr_write(adapter, MAC_RX, macrx);
2985}
2986
2987static int lan743x_pm_suspend(struct device *dev)
2988{
2989 struct pci_dev *pdev = to_pci_dev(dev);
2990 struct net_device *netdev = pci_get_drvdata(pdev);
2991 struct lan743x_adapter *adapter = netdev_priv(netdev);
2992
2993 lan743x_pcidev_shutdown(pdev);
2994
2995 /* clear all wakes */
2996 lan743x_csr_write(adapter, MAC_WUCSR, 0);
2997 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2998 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
2999
3000 if (adapter->wolopts)
3001 lan743x_pm_set_wol(adapter);
3002
3003 /* Host sets PME_En, put D3hot */
3004 return pci_prepare_to_sleep(pdev);
3005}
3006
3007static int lan743x_pm_resume(struct device *dev)
3008{
3009 struct pci_dev *pdev = to_pci_dev(dev);
3010 struct net_device *netdev = pci_get_drvdata(pdev);
3011 struct lan743x_adapter *adapter = netdev_priv(netdev);
3012 int ret;
3013
3014 pci_set_power_state(pdev, PCI_D0);
3015 pci_restore_state(pdev);
3016 pci_save_state(pdev);
3017
3018 ret = lan743x_hardware_init(adapter, pdev);
3019 if (ret) {
3020 netif_err(adapter, probe, adapter->netdev,
3021 "lan743x_hardware_init returned %d\n", ret);
3022 }
3023
3024 /* open netdev when netdev is at running state while resume.
3025 * For instance, it is true when system wakesup after pm-suspend
3026 * However, it is false when system wakes up after suspend GUI menu
3027 */
3028 if (netif_running(netdev))
3029 lan743x_netdev_open(netdev);
3030
3031 netif_device_attach(netdev);
3032
3033 return 0;
3034}
3035
3036static const struct dev_pm_ops lan743x_pm_ops = {
3037 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3038};
3039#endif /* CONFIG_PM_SLEEP */
3040
3041static const struct pci_device_id lan743x_pcidev_tbl[] = {
3042 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3043 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3044 { 0, }
3045};
3046
3047MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3048
3049static struct pci_driver lan743x_pcidev_driver = {
3050 .name = DRIVER_NAME,
3051 .id_table = lan743x_pcidev_tbl,
3052 .probe = lan743x_pcidev_probe,
3053 .remove = lan743x_pcidev_remove,
3054#ifdef CONFIG_PM_SLEEP
3055 .driver.pm = &lan743x_pm_ops,
3056#endif
3057 .shutdown = lan743x_pcidev_shutdown,
3058};
3059
3060module_pci_driver(lan743x_pcidev_driver);
3061
3062MODULE_AUTHOR(DRIVER_AUTHOR);
3063MODULE_DESCRIPTION(DRIVER_DESC);
3064MODULE_LICENSE("GPL");