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