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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / drivers / net / ethernet / microchip / lan743x_main.c
blob001b5f714c1b767e80835aa62fb4afa8be5e06d7
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
18 static 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
26 static 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
51 disable_device:
52 pci_disable_device(adapter->pdev);
53
54 return_error:
55 return ret;
56 }
57
58 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
59 {
60 return ioread32(&adapter->csr.csr_address[offset]);
61 }
62
63 void 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
71 static 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
83 static 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
95 static 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;
136 clean_up:
137 return result;
138 }
139
140 static 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
153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
154 {
155 struct lan743x_tx *tx = context;
156 struct lan743x_adapter *adapter = tx->adapter;
157 bool enable_flag = true;
158 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
195 static 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
236 static 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
279 static 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));
341 irq_done:
342 return result;
343 }
344
345 static 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
371 static 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
401 static 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
414 static 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
426 static 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
452 static 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_CLEAR |
589 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
590 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
591 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
592 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
593 }
594
595 for (index = 0; index < number_of_tx_vectors; index++) {
596 u32 int_bit = INT_BIT_DMA_TX_(index);
597 int vector = index + 1;
598
599 /* map TX interrupt to vector */
600 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
601 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
602 if (flags &
603 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
604 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
605 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
606 int_vec_en_auto_clr);
607 }
608
609 /* Remove TX interrupt from shared mask */
610 intr->vector_list[0].int_mask &= ~int_bit;
611 ret = lan743x_intr_register_isr(adapter, vector, flags,
612 int_bit, lan743x_tx_isr,
613 &adapter->tx[index]);
614 if (ret)
615 goto clean_up;
616 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
617 if (!(flags &
618 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
619 lan743x_csr_write(adapter, INT_VEC_EN_SET,
620 INT_VEC_EN_(vector));
621 }
622 }
623 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
624 int number_of_rx_vectors = intr->number_of_vectors -
625 LAN743X_USED_TX_CHANNELS - 1;
626
627 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
628 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
629
630 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
631 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
632 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
633 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
634 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
635 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
636
637 if (adapter->csr.flags &
638 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
639 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
640 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
641 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
642 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
643 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
644 }
645 for (index = 0; index < number_of_rx_vectors; index++) {
646 int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
647 u32 int_bit = INT_BIT_DMA_RX_(index);
648
649 /* map RX interrupt to vector */
650 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
651 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
652 if (flags &
653 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
654 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
655 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
656 int_vec_en_auto_clr);
657 }
658
659 /* Remove RX interrupt from shared mask */
660 intr->vector_list[0].int_mask &= ~int_bit;
661 ret = lan743x_intr_register_isr(adapter, vector, flags,
662 int_bit, lan743x_rx_isr,
663 &adapter->rx[index]);
664 if (ret)
665 goto clean_up;
666 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
667
668 lan743x_csr_write(adapter, INT_VEC_EN_SET,
669 INT_VEC_EN_(vector));
670 }
671 }
672 return 0;
673
674 clean_up:
675 lan743x_intr_close(adapter);
676 return ret;
677 }
678
679 static int lan743x_dp_write(struct lan743x_adapter *adapter,
680 u32 select, u32 addr, u32 length, u32 *buf)
681 {
682 int ret = -EIO;
683 u32 dp_sel;
684 int i;
685
686 mutex_lock(&adapter->dp_lock);
687 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
688 1, 40, 100, 100))
689 goto unlock;
690 dp_sel = lan743x_csr_read(adapter, DP_SEL);
691 dp_sel &= ~DP_SEL_MASK_;
692 dp_sel |= select;
693 lan743x_csr_write(adapter, DP_SEL, dp_sel);
694
695 for (i = 0; i < length; i++) {
696 lan743x_csr_write(adapter, DP_ADDR, addr + i);
697 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
698 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
699 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
700 1, 40, 100, 100))
701 goto unlock;
702 }
703 ret = 0;
704
705 unlock:
706 mutex_unlock(&adapter->dp_lock);
707 return ret;
708 }
709
710 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
711 {
712 u32 ret;
713
714 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
715 MAC_MII_ACC_PHY_ADDR_MASK_;
716 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
717 MAC_MII_ACC_MIIRINDA_MASK_;
718
719 if (read)
720 ret |= MAC_MII_ACC_MII_READ_;
721 else
722 ret |= MAC_MII_ACC_MII_WRITE_;
723 ret |= MAC_MII_ACC_MII_BUSY_;
724
725 return ret;
726 }
727
728 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
729 {
730 u32 data;
731
732 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
733 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
734 }
735
736 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
737 {
738 struct lan743x_adapter *adapter = bus->priv;
739 u32 val, mii_access;
740 int ret;
741
742 /* comfirm MII not busy */
743 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
744 if (ret < 0)
745 return ret;
746
747 /* set the address, index & direction (read from PHY) */
748 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
749 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
750 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
751 if (ret < 0)
752 return ret;
753
754 val = lan743x_csr_read(adapter, MAC_MII_DATA);
755 return (int)(val & 0xFFFF);
756 }
757
758 static int lan743x_mdiobus_write(struct mii_bus *bus,
759 int phy_id, int index, u16 regval)
760 {
761 struct lan743x_adapter *adapter = bus->priv;
762 u32 val, mii_access;
763 int ret;
764
765 /* confirm MII not busy */
766 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
767 if (ret < 0)
768 return ret;
769 val = (u32)regval;
770 lan743x_csr_write(adapter, MAC_MII_DATA, val);
771
772 /* set the address, index & direction (write to PHY) */
773 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
774 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
775 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
776 return ret;
777 }
778
779 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
780 u8 *addr)
781 {
782 u32 addr_lo, addr_hi;
783
784 addr_lo = addr[0] |
785 addr[1] << 8 |
786 addr[2] << 16 |
787 addr[3] << 24;
788 addr_hi = addr[4] |
789 addr[5] << 8;
790 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
791 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
792
793 ether_addr_copy(adapter->mac_address, addr);
794 netif_info(adapter, drv, adapter->netdev,
795 "MAC address set to %pM\n", addr);
796 }
797
798 static int lan743x_mac_init(struct lan743x_adapter *adapter)
799 {
800 bool mac_address_valid = true;
801 struct net_device *netdev;
802 u32 mac_addr_hi = 0;
803 u32 mac_addr_lo = 0;
804 u32 data;
805 int ret;
806
807 netdev = adapter->netdev;
808 lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
809 ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
810 0, 1000, 20000, 100);
811 if (ret)
812 return ret;
813
814 /* setup auto duplex, and speed detection */
815 data = lan743x_csr_read(adapter, MAC_CR);
816 data |= MAC_CR_ADD_ | MAC_CR_ASD_;
817 data |= MAC_CR_CNTR_RST_;
818 lan743x_csr_write(adapter, MAC_CR, data);
819
820 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
821 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
822 adapter->mac_address[0] = mac_addr_lo & 0xFF;
823 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
824 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
825 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
826 adapter->mac_address[4] = mac_addr_hi & 0xFF;
827 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
828
829 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
830 mac_addr_lo == 0xFFFFFFFF) {
831 mac_address_valid = false;
832 } else if (!is_valid_ether_addr(adapter->mac_address)) {
833 mac_address_valid = false;
834 }
835
836 if (!mac_address_valid)
837 eth_random_addr(adapter->mac_address);
838 lan743x_mac_set_address(adapter, adapter->mac_address);
839 ether_addr_copy(netdev->dev_addr, adapter->mac_address);
840 return 0;
841 }
842
843 static int lan743x_mac_open(struct lan743x_adapter *adapter)
844 {
845 int ret = 0;
846 u32 temp;
847
848 temp = lan743x_csr_read(adapter, MAC_RX);
849 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
850 temp = lan743x_csr_read(adapter, MAC_TX);
851 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
852 return ret;
853 }
854
855 static void lan743x_mac_close(struct lan743x_adapter *adapter)
856 {
857 u32 temp;
858
859 temp = lan743x_csr_read(adapter, MAC_TX);
860 temp &= ~MAC_TX_TXEN_;
861 lan743x_csr_write(adapter, MAC_TX, temp);
862 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
863 1, 1000, 20000, 100);
864
865 temp = lan743x_csr_read(adapter, MAC_RX);
866 temp &= ~MAC_RX_RXEN_;
867 lan743x_csr_write(adapter, MAC_RX, temp);
868 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
869 1, 1000, 20000, 100);
870 }
871
872 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
873 bool tx_enable, bool rx_enable)
874 {
875 u32 flow_setting = 0;
876
877 /* set maximum pause time because when fifo space frees
878 * up a zero value pause frame will be sent to release the pause
879 */
880 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
881 if (tx_enable)
882 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
883 if (rx_enable)
884 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
885 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
886 }
887
888 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
889 {
890 int enabled = 0;
891 u32 mac_rx = 0;
892
893 mac_rx = lan743x_csr_read(adapter, MAC_RX);
894 if (mac_rx & MAC_RX_RXEN_) {
895 enabled = 1;
896 if (mac_rx & MAC_RX_RXD_) {
897 lan743x_csr_write(adapter, MAC_RX, mac_rx);
898 mac_rx &= ~MAC_RX_RXD_;
899 }
900 mac_rx &= ~MAC_RX_RXEN_;
901 lan743x_csr_write(adapter, MAC_RX, mac_rx);
902 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
903 1, 1000, 20000, 100);
904 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
905 }
906
907 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
908 mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
909 MAC_RX_MAX_SIZE_MASK_);
910 lan743x_csr_write(adapter, MAC_RX, mac_rx);
911
912 if (enabled) {
913 mac_rx |= MAC_RX_RXEN_;
914 lan743x_csr_write(adapter, MAC_RX, mac_rx);
915 }
916 return 0;
917 }
918
919 /* PHY */
920 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
921 {
922 u32 data;
923
924 /* Only called with in probe, and before mdiobus_register */
925
926 data = lan743x_csr_read(adapter, PMT_CTL);
927 data |= PMT_CTL_ETH_PHY_RST_;
928 lan743x_csr_write(adapter, PMT_CTL, data);
929
930 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
931 (!(data & PMT_CTL_ETH_PHY_RST_) &&
932 (data & PMT_CTL_READY_)),
933 50000, 1000000);
934 }
935
936 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
937 u8 duplex, u16 local_adv,
938 u16 remote_adv)
939 {
940 struct lan743x_phy *phy = &adapter->phy;
941 u8 cap;
942
943 if (phy->fc_autoneg)
944 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
945 else
946 cap = phy->fc_request_control;
947
948 lan743x_mac_flow_ctrl_set_enables(adapter,
949 cap & FLOW_CTRL_TX,
950 cap & FLOW_CTRL_RX);
951 }
952
953 static int lan743x_phy_init(struct lan743x_adapter *adapter)
954 {
955 return lan743x_phy_reset(adapter);
956 }
957
958 static void lan743x_phy_link_status_change(struct net_device *netdev)
959 {
960 struct lan743x_adapter *adapter = netdev_priv(netdev);
961 struct phy_device *phydev = netdev->phydev;
962
963 phy_print_status(phydev);
964 if (phydev->state == PHY_RUNNING) {
965 struct ethtool_link_ksettings ksettings;
966 int remote_advertisement = 0;
967 int local_advertisement = 0;
968
969 memset(&ksettings, 0, sizeof(ksettings));
970 phy_ethtool_get_link_ksettings(netdev, &ksettings);
971 local_advertisement = phy_read(phydev, MII_ADVERTISE);
972 if (local_advertisement < 0)
973 return;
974
975 remote_advertisement = phy_read(phydev, MII_LPA);
976 if (remote_advertisement < 0)
977 return;
978
979 lan743x_phy_update_flowcontrol(adapter,
980 ksettings.base.duplex,
981 local_advertisement,
982 remote_advertisement);
983 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
984 }
985 }
986
987 static void lan743x_phy_close(struct lan743x_adapter *adapter)
988 {
989 struct net_device *netdev = adapter->netdev;
990
991 phy_stop(netdev->phydev);
992 phy_disconnect(netdev->phydev);
993 netdev->phydev = NULL;
994 }
995
996 static int lan743x_phy_open(struct lan743x_adapter *adapter)
997 {
998 struct lan743x_phy *phy = &adapter->phy;
999 struct phy_device *phydev;
1000 struct net_device *netdev;
1001 int ret = -EIO;
1002 u32 mii_adv;
1003
1004 netdev = adapter->netdev;
1005 phydev = phy_find_first(adapter->mdiobus);
1006 if (!phydev)
1007 goto return_error;
1008
1009 ret = phy_connect_direct(netdev, phydev,
1010 lan743x_phy_link_status_change,
1011 PHY_INTERFACE_MODE_GMII);
1012 if (ret)
1013 goto return_error;
1014
1015 /* MAC doesn't support 1000T Half */
1016 phydev->supported &= ~SUPPORTED_1000baseT_Half;
1017
1018 /* support both flow controls */
1019 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1020 phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1021 mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
1022 phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
1023 phy->fc_autoneg = phydev->autoneg;
1024
1025 phy_start(phydev);
1026 phy_start_aneg(phydev);
1027 return 0;
1028
1029 return_error:
1030 return ret;
1031 }
1032
1033 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1034 {
1035 lan743x_csr_write(adapter, RFE_RSS_CFG,
1036 RFE_RSS_CFG_UDP_IPV6_EX_ |
1037 RFE_RSS_CFG_TCP_IPV6_EX_ |
1038 RFE_RSS_CFG_IPV6_EX_ |
1039 RFE_RSS_CFG_UDP_IPV6_ |
1040 RFE_RSS_CFG_TCP_IPV6_ |
1041 RFE_RSS_CFG_IPV6_ |
1042 RFE_RSS_CFG_UDP_IPV4_ |
1043 RFE_RSS_CFG_TCP_IPV4_ |
1044 RFE_RSS_CFG_IPV4_ |
1045 RFE_RSS_CFG_VALID_HASH_BITS_ |
1046 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1047 RFE_RSS_CFG_RSS_HASH_STORE_ |
1048 RFE_RSS_CFG_RSS_ENABLE_);
1049 }
1050
1051 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1052 {
1053 u8 *mac_addr;
1054 u32 mac_addr_hi = 0;
1055 u32 mac_addr_lo = 0;
1056
1057 /* Add mac address to perfect Filter */
1058 mac_addr = adapter->mac_address;
1059 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1060 (((u32)(mac_addr[1])) << 8) |
1061 (((u32)(mac_addr[2])) << 16) |
1062 (((u32)(mac_addr[3])) << 24));
1063 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1064 (((u32)(mac_addr[5])) << 8));
1065
1066 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1067 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1068 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1069 }
1070
1071 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1072 {
1073 struct net_device *netdev = adapter->netdev;
1074 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1075 u32 rfctl;
1076 u32 data;
1077
1078 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1079 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1080 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1081 rfctl |= RFE_CTL_AB_;
1082 if (netdev->flags & IFF_PROMISC) {
1083 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1084 } else {
1085 if (netdev->flags & IFF_ALLMULTI)
1086 rfctl |= RFE_CTL_AM_;
1087 }
1088
1089 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1090 if (netdev_mc_count(netdev)) {
1091 struct netdev_hw_addr *ha;
1092 int i;
1093
1094 rfctl |= RFE_CTL_DA_PERFECT_;
1095 i = 1;
1096 netdev_for_each_mc_addr(ha, netdev) {
1097 /* set first 32 into Perfect Filter */
1098 if (i < 33) {
1099 lan743x_csr_write(adapter,
1100 RFE_ADDR_FILT_HI(i), 0);
1101 data = ha->addr[3];
1102 data = ha->addr[2] | (data << 8);
1103 data = ha->addr[1] | (data << 8);
1104 data = ha->addr[0] | (data << 8);
1105 lan743x_csr_write(adapter,
1106 RFE_ADDR_FILT_LO(i), data);
1107 data = ha->addr[5];
1108 data = ha->addr[4] | (data << 8);
1109 data |= RFE_ADDR_FILT_HI_VALID_;
1110 lan743x_csr_write(adapter,
1111 RFE_ADDR_FILT_HI(i), data);
1112 } else {
1113 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1114 23) & 0x1FF;
1115 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1116 rfctl |= RFE_CTL_MCAST_HASH_;
1117 }
1118 i++;
1119 }
1120 }
1121
1122 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1123 DP_SEL_VHF_VLAN_LEN,
1124 DP_SEL_VHF_HASH_LEN, hash_table);
1125 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1126 }
1127
1128 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1129 {
1130 u32 data = 0;
1131
1132 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1133 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1134 0, 1000, 20000, 100);
1135 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1136 case DMA_DESCRIPTOR_SPACING_16:
1137 data = DMAC_CFG_MAX_DSPACE_16_;
1138 break;
1139 case DMA_DESCRIPTOR_SPACING_32:
1140 data = DMAC_CFG_MAX_DSPACE_32_;
1141 break;
1142 case DMA_DESCRIPTOR_SPACING_64:
1143 data = DMAC_CFG_MAX_DSPACE_64_;
1144 break;
1145 case DMA_DESCRIPTOR_SPACING_128:
1146 data = DMAC_CFG_MAX_DSPACE_128_;
1147 break;
1148 default:
1149 return -EPERM;
1150 }
1151 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1152 data |= DMAC_CFG_COAL_EN_;
1153 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1154 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1155 lan743x_csr_write(adapter, DMAC_CFG, data);
1156 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1157 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1158 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1159 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1160 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1161 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1162 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1163 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1164 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1165 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1166 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1167 return 0;
1168 }
1169
1170 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1171 int tx_channel)
1172 {
1173 u32 dmac_cmd = 0;
1174
1175 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1176 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1177 DMAC_CMD_START_T_(tx_channel)),
1178 (dmac_cmd &
1179 DMAC_CMD_STOP_T_(tx_channel)));
1180 }
1181
1182 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1183 int tx_channel)
1184 {
1185 int timeout = 100;
1186 int result = 0;
1187
1188 while (timeout &&
1189 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1190 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1191 usleep_range(1000, 20000);
1192 timeout--;
1193 }
1194 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1195 result = -ENODEV;
1196 return result;
1197 }
1198
1199 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1200 int rx_channel)
1201 {
1202 u32 dmac_cmd = 0;
1203
1204 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1205 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1206 DMAC_CMD_START_R_(rx_channel)),
1207 (dmac_cmd &
1208 DMAC_CMD_STOP_R_(rx_channel)));
1209 }
1210
1211 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1212 int rx_channel)
1213 {
1214 int timeout = 100;
1215 int result = 0;
1216
1217 while (timeout &&
1218 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1219 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1220 usleep_range(1000, 20000);
1221 timeout--;
1222 }
1223 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1224 result = -ENODEV;
1225 return result;
1226 }
1227
1228 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1229 int descriptor_index, bool cleanup)
1230 {
1231 struct lan743x_tx_buffer_info *buffer_info = NULL;
1232 struct lan743x_tx_descriptor *descriptor = NULL;
1233 u32 descriptor_type = 0;
1234 bool ignore_sync;
1235
1236 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1237 buffer_info = &tx->buffer_info[descriptor_index];
1238 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1239 goto done;
1240
1241 descriptor_type = (descriptor->data0) &
1242 TX_DESC_DATA0_DTYPE_MASK_;
1243 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1244 goto clean_up_data_descriptor;
1245 else
1246 goto clear_active;
1247
1248 clean_up_data_descriptor:
1249 if (buffer_info->dma_ptr) {
1250 if (buffer_info->flags &
1251 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1252 dma_unmap_page(&tx->adapter->pdev->dev,
1253 buffer_info->dma_ptr,
1254 buffer_info->buffer_length,
1255 DMA_TO_DEVICE);
1256 } else {
1257 dma_unmap_single(&tx->adapter->pdev->dev,
1258 buffer_info->dma_ptr,
1259 buffer_info->buffer_length,
1260 DMA_TO_DEVICE);
1261 }
1262 buffer_info->dma_ptr = 0;
1263 buffer_info->buffer_length = 0;
1264 }
1265 if (!buffer_info->skb)
1266 goto clear_active;
1267
1268 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1269 dev_kfree_skb(buffer_info->skb);
1270 goto clear_skb;
1271 }
1272
1273 if (cleanup) {
1274 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1275 dev_kfree_skb(buffer_info->skb);
1276 } else {
1277 ignore_sync = (buffer_info->flags &
1278 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1279 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1280 buffer_info->skb, ignore_sync);
1281 }
1282
1283 clear_skb:
1284 buffer_info->skb = NULL;
1285
1286 clear_active:
1287 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1288
1289 done:
1290 memset(buffer_info, 0, sizeof(*buffer_info));
1291 memset(descriptor, 0, sizeof(*descriptor));
1292 }
1293
1294 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1295 {
1296 return ((++index) % tx->ring_size);
1297 }
1298
1299 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1300 {
1301 while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1302 lan743x_tx_release_desc(tx, tx->last_head, false);
1303 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1304 }
1305 }
1306
1307 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1308 {
1309 u32 original_head = 0;
1310
1311 original_head = tx->last_head;
1312 do {
1313 lan743x_tx_release_desc(tx, tx->last_head, true);
1314 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1315 } while (tx->last_head != original_head);
1316 memset(tx->ring_cpu_ptr, 0,
1317 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1318 memset(tx->buffer_info, 0,
1319 sizeof(*tx->buffer_info) * (tx->ring_size));
1320 }
1321
1322 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1323 struct sk_buff *skb)
1324 {
1325 int result = 1; /* 1 for the main skb buffer */
1326 int nr_frags = 0;
1327
1328 if (skb_is_gso(skb))
1329 result++; /* requires an extension descriptor */
1330 nr_frags = skb_shinfo(skb)->nr_frags;
1331 result += nr_frags; /* 1 for each fragment buffer */
1332 return result;
1333 }
1334
1335 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1336 {
1337 int last_head = tx->last_head;
1338 int last_tail = tx->last_tail;
1339
1340 if (last_tail >= last_head)
1341 return tx->ring_size - last_tail + last_head - 1;
1342 else
1343 return last_head - last_tail - 1;
1344 }
1345
1346 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1347 bool enable_timestamping,
1348 bool enable_onestep_sync)
1349 {
1350 if (enable_timestamping)
1351 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1352 else
1353 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1354 if (enable_onestep_sync)
1355 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1356 else
1357 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1358 }
1359
1360 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1361 unsigned char *first_buffer,
1362 unsigned int first_buffer_length,
1363 unsigned int frame_length,
1364 bool time_stamp,
1365 bool check_sum)
1366 {
1367 /* called only from within lan743x_tx_xmit_frame.
1368 * assuming tx->ring_lock has already been acquired.
1369 */
1370 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1371 struct lan743x_tx_buffer_info *buffer_info = NULL;
1372 struct lan743x_adapter *adapter = tx->adapter;
1373 struct device *dev = &adapter->pdev->dev;
1374 dma_addr_t dma_ptr;
1375
1376 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1377 tx->frame_first = tx->last_tail;
1378 tx->frame_tail = tx->frame_first;
1379
1380 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1381 buffer_info = &tx->buffer_info[tx->frame_tail];
1382 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1383 DMA_TO_DEVICE);
1384 if (dma_mapping_error(dev, dma_ptr))
1385 return -ENOMEM;
1386
1387 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1388 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1389 tx_descriptor->data3 = (frame_length << 16) &
1390 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1391
1392 buffer_info->skb = NULL;
1393 buffer_info->dma_ptr = dma_ptr;
1394 buffer_info->buffer_length = first_buffer_length;
1395 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1396
1397 tx->frame_data0 = (first_buffer_length &
1398 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1399 TX_DESC_DATA0_DTYPE_DATA_ |
1400 TX_DESC_DATA0_FS_ |
1401 TX_DESC_DATA0_FCS_;
1402 if (time_stamp)
1403 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1404
1405 if (check_sum)
1406 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1407 TX_DESC_DATA0_IPE_ |
1408 TX_DESC_DATA0_TPE_;
1409
1410 /* data0 will be programmed in one of other frame assembler functions */
1411 return 0;
1412 }
1413
1414 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1415 unsigned int frame_length)
1416 {
1417 /* called only from within lan743x_tx_xmit_frame.
1418 * assuming tx->ring_lock has already been acquired.
1419 */
1420 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1421 struct lan743x_tx_buffer_info *buffer_info = NULL;
1422
1423 /* wrap up previous descriptor */
1424 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1425 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1426 tx_descriptor->data0 = tx->frame_data0;
1427
1428 /* move to next descriptor */
1429 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1430 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1431 buffer_info = &tx->buffer_info[tx->frame_tail];
1432
1433 /* add extension descriptor */
1434 tx_descriptor->data1 = 0;
1435 tx_descriptor->data2 = 0;
1436 tx_descriptor->data3 = 0;
1437
1438 buffer_info->skb = NULL;
1439 buffer_info->dma_ptr = 0;
1440 buffer_info->buffer_length = 0;
1441 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1442
1443 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1444 TX_DESC_DATA0_DTYPE_EXT_ |
1445 TX_DESC_DATA0_EXT_LSO_;
1446
1447 /* data0 will be programmed in one of other frame assembler functions */
1448 }
1449
1450 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1451 const struct skb_frag_struct *fragment,
1452 unsigned int frame_length)
1453 {
1454 /* called only from within lan743x_tx_xmit_frame
1455 * assuming tx->ring_lock has already been acquired
1456 */
1457 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1458 struct lan743x_tx_buffer_info *buffer_info = NULL;
1459 struct lan743x_adapter *adapter = tx->adapter;
1460 struct device *dev = &adapter->pdev->dev;
1461 unsigned int fragment_length = 0;
1462 dma_addr_t dma_ptr;
1463
1464 fragment_length = skb_frag_size(fragment);
1465 if (!fragment_length)
1466 return 0;
1467
1468 /* wrap up previous descriptor */
1469 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1470 tx_descriptor->data0 = tx->frame_data0;
1471
1472 /* move to next descriptor */
1473 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1474 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1475 buffer_info = &tx->buffer_info[tx->frame_tail];
1476 dma_ptr = skb_frag_dma_map(dev, fragment,
1477 0, fragment_length,
1478 DMA_TO_DEVICE);
1479 if (dma_mapping_error(dev, dma_ptr)) {
1480 int desc_index;
1481
1482 /* cleanup all previously setup descriptors */
1483 desc_index = tx->frame_first;
1484 while (desc_index != tx->frame_tail) {
1485 lan743x_tx_release_desc(tx, desc_index, true);
1486 desc_index = lan743x_tx_next_index(tx, desc_index);
1487 }
1488 dma_wmb();
1489 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1490 tx->frame_first = 0;
1491 tx->frame_data0 = 0;
1492 tx->frame_tail = 0;
1493 return -ENOMEM;
1494 }
1495
1496 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1497 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1498 tx_descriptor->data3 = (frame_length << 16) &
1499 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1500
1501 buffer_info->skb = NULL;
1502 buffer_info->dma_ptr = dma_ptr;
1503 buffer_info->buffer_length = fragment_length;
1504 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1505 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1506
1507 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1508 TX_DESC_DATA0_DTYPE_DATA_ |
1509 TX_DESC_DATA0_FCS_;
1510
1511 /* data0 will be programmed in one of other frame assembler functions */
1512 return 0;
1513 }
1514
1515 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1516 struct sk_buff *skb,
1517 bool time_stamp,
1518 bool ignore_sync)
1519 {
1520 /* called only from within lan743x_tx_xmit_frame
1521 * assuming tx->ring_lock has already been acquired
1522 */
1523 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1524 struct lan743x_tx_buffer_info *buffer_info = NULL;
1525 struct lan743x_adapter *adapter = tx->adapter;
1526 u32 tx_tail_flags = 0;
1527
1528 /* wrap up previous descriptor */
1529 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1530 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1531
1532 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1533 buffer_info = &tx->buffer_info[tx->frame_tail];
1534 buffer_info->skb = skb;
1535 if (time_stamp)
1536 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1537 if (ignore_sync)
1538 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1539
1540 tx_descriptor->data0 = tx->frame_data0;
1541 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1542 tx->last_tail = tx->frame_tail;
1543
1544 dma_wmb();
1545
1546 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1547 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1548 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1549 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1550 TX_TAIL_SET_TOP_INT_EN_;
1551
1552 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1553 tx_tail_flags | tx->frame_tail);
1554 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1555 }
1556
1557 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1558 struct sk_buff *skb)
1559 {
1560 int required_number_of_descriptors = 0;
1561 unsigned int start_frame_length = 0;
1562 unsigned int frame_length = 0;
1563 unsigned int head_length = 0;
1564 unsigned long irq_flags = 0;
1565 bool do_timestamp = false;
1566 bool ignore_sync = false;
1567 int nr_frags = 0;
1568 bool gso = false;
1569 int j;
1570
1571 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1572
1573 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1574 if (required_number_of_descriptors >
1575 lan743x_tx_get_avail_desc(tx)) {
1576 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1577 dev_kfree_skb(skb);
1578 } else {
1579 /* save to overflow buffer */
1580 tx->overflow_skb = skb;
1581 netif_stop_queue(tx->adapter->netdev);
1582 }
1583 goto unlock;
1584 }
1585
1586 /* space available, transmit skb */
1587 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1588 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1589 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1590 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1591 do_timestamp = true;
1592 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1593 ignore_sync = true;
1594 }
1595 head_length = skb_headlen(skb);
1596 frame_length = skb_pagelen(skb);
1597 nr_frags = skb_shinfo(skb)->nr_frags;
1598 start_frame_length = frame_length;
1599 gso = skb_is_gso(skb);
1600 if (gso) {
1601 start_frame_length = max(skb_shinfo(skb)->gso_size,
1602 (unsigned short)8);
1603 }
1604
1605 if (lan743x_tx_frame_start(tx,
1606 skb->data, head_length,
1607 start_frame_length,
1608 do_timestamp,
1609 skb->ip_summed == CHECKSUM_PARTIAL)) {
1610 dev_kfree_skb(skb);
1611 goto unlock;
1612 }
1613
1614 if (gso)
1615 lan743x_tx_frame_add_lso(tx, frame_length);
1616
1617 if (nr_frags <= 0)
1618 goto finish;
1619
1620 for (j = 0; j < nr_frags; j++) {
1621 const struct skb_frag_struct *frag;
1622
1623 frag = &(skb_shinfo(skb)->frags[j]);
1624 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1625 /* upon error no need to call
1626 * lan743x_tx_frame_end
1627 * frame assembler clean up was performed inside
1628 * lan743x_tx_frame_add_fragment
1629 */
1630 dev_kfree_skb(skb);
1631 goto unlock;
1632 }
1633 }
1634
1635 finish:
1636 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1637
1638 unlock:
1639 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1640 return NETDEV_TX_OK;
1641 }
1642
1643 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1644 {
1645 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1646 struct lan743x_adapter *adapter = tx->adapter;
1647 bool start_transmitter = false;
1648 unsigned long irq_flags = 0;
1649 u32 ioc_bit = 0;
1650 u32 int_sts = 0;
1651
1652 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1653 int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
1654 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1655 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1656 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1657
1658 /* clean up tx ring */
1659 lan743x_tx_release_completed_descriptors(tx);
1660 if (netif_queue_stopped(adapter->netdev)) {
1661 if (tx->overflow_skb) {
1662 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1663 lan743x_tx_get_avail_desc(tx))
1664 start_transmitter = true;
1665 } else {
1666 netif_wake_queue(adapter->netdev);
1667 }
1668 }
1669 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1670
1671 if (start_transmitter) {
1672 /* space is now available, transmit overflow skb */
1673 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1674 tx->overflow_skb = NULL;
1675 netif_wake_queue(adapter->netdev);
1676 }
1677
1678 if (!napi_complete_done(napi, weight))
1679 goto done;
1680
1681 /* enable isr */
1682 lan743x_csr_write(adapter, INT_EN_SET,
1683 INT_BIT_DMA_TX_(tx->channel_number));
1684 lan743x_csr_read(adapter, INT_STS);
1685
1686 done:
1687 return weight;
1688 }
1689
1690 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1691 {
1692 if (tx->head_cpu_ptr) {
1693 pci_free_consistent(tx->adapter->pdev,
1694 sizeof(*tx->head_cpu_ptr),
1695 (void *)(tx->head_cpu_ptr),
1696 tx->head_dma_ptr);
1697 tx->head_cpu_ptr = NULL;
1698 tx->head_dma_ptr = 0;
1699 }
1700 kfree(tx->buffer_info);
1701 tx->buffer_info = NULL;
1702
1703 if (tx->ring_cpu_ptr) {
1704 pci_free_consistent(tx->adapter->pdev,
1705 tx->ring_allocation_size,
1706 tx->ring_cpu_ptr,
1707 tx->ring_dma_ptr);
1708 tx->ring_allocation_size = 0;
1709 tx->ring_cpu_ptr = NULL;
1710 tx->ring_dma_ptr = 0;
1711 }
1712 tx->ring_size = 0;
1713 }
1714
1715 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1716 {
1717 size_t ring_allocation_size = 0;
1718 void *cpu_ptr = NULL;
1719 dma_addr_t dma_ptr;
1720 int ret = -ENOMEM;
1721
1722 tx->ring_size = LAN743X_TX_RING_SIZE;
1723 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1724 ret = -EINVAL;
1725 goto cleanup;
1726 }
1727 ring_allocation_size = ALIGN(tx->ring_size *
1728 sizeof(struct lan743x_tx_descriptor),
1729 PAGE_SIZE);
1730 dma_ptr = 0;
1731 cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1732 ring_allocation_size, &dma_ptr);
1733 if (!cpu_ptr) {
1734 ret = -ENOMEM;
1735 goto cleanup;
1736 }
1737
1738 tx->ring_allocation_size = ring_allocation_size;
1739 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1740 tx->ring_dma_ptr = dma_ptr;
1741
1742 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1743 if (!cpu_ptr) {
1744 ret = -ENOMEM;
1745 goto cleanup;
1746 }
1747 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1748 dma_ptr = 0;
1749 cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
1750 sizeof(*tx->head_cpu_ptr), &dma_ptr);
1751 if (!cpu_ptr) {
1752 ret = -ENOMEM;
1753 goto cleanup;
1754 }
1755
1756 tx->head_cpu_ptr = cpu_ptr;
1757 tx->head_dma_ptr = dma_ptr;
1758 if (tx->head_dma_ptr & 0x3) {
1759 ret = -ENOMEM;
1760 goto cleanup;
1761 }
1762
1763 return 0;
1764
1765 cleanup:
1766 lan743x_tx_ring_cleanup(tx);
1767 return ret;
1768 }
1769
1770 static void lan743x_tx_close(struct lan743x_tx *tx)
1771 {
1772 struct lan743x_adapter *adapter = tx->adapter;
1773
1774 lan743x_csr_write(adapter,
1775 DMAC_CMD,
1776 DMAC_CMD_STOP_T_(tx->channel_number));
1777 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1778
1779 lan743x_csr_write(adapter,
1780 DMAC_INT_EN_CLR,
1781 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1782 lan743x_csr_write(adapter, INT_EN_CLR,
1783 INT_BIT_DMA_TX_(tx->channel_number));
1784 napi_disable(&tx->napi);
1785 netif_napi_del(&tx->napi);
1786
1787 lan743x_csr_write(adapter, FCT_TX_CTL,
1788 FCT_TX_CTL_DIS_(tx->channel_number));
1789 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1790 FCT_TX_CTL_EN_(tx->channel_number),
1791 0, 1000, 20000, 100);
1792
1793 lan743x_tx_release_all_descriptors(tx);
1794
1795 if (tx->overflow_skb) {
1796 dev_kfree_skb(tx->overflow_skb);
1797 tx->overflow_skb = NULL;
1798 }
1799
1800 lan743x_tx_ring_cleanup(tx);
1801 }
1802
1803 static int lan743x_tx_open(struct lan743x_tx *tx)
1804 {
1805 struct lan743x_adapter *adapter = NULL;
1806 u32 data = 0;
1807 int ret;
1808
1809 adapter = tx->adapter;
1810 ret = lan743x_tx_ring_init(tx);
1811 if (ret)
1812 return ret;
1813
1814 /* initialize fifo */
1815 lan743x_csr_write(adapter, FCT_TX_CTL,
1816 FCT_TX_CTL_RESET_(tx->channel_number));
1817 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1818 FCT_TX_CTL_RESET_(tx->channel_number),
1819 0, 1000, 20000, 100);
1820
1821 /* enable fifo */
1822 lan743x_csr_write(adapter, FCT_TX_CTL,
1823 FCT_TX_CTL_EN_(tx->channel_number));
1824
1825 /* reset tx channel */
1826 lan743x_csr_write(adapter, DMAC_CMD,
1827 DMAC_CMD_TX_SWR_(tx->channel_number));
1828 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1829 DMAC_CMD_TX_SWR_(tx->channel_number),
1830 0, 1000, 20000, 100);
1831
1832 /* Write TX_BASE_ADDR */
1833 lan743x_csr_write(adapter,
1834 TX_BASE_ADDRH(tx->channel_number),
1835 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1836 lan743x_csr_write(adapter,
1837 TX_BASE_ADDRL(tx->channel_number),
1838 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1839
1840 /* Write TX_CFG_B */
1841 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1842 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1843 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1844 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1845 data |= TX_CFG_B_TDMABL_512_;
1846 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1847
1848 /* Write TX_CFG_A */
1849 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1850 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1851 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1852 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1853 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1854 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1855 }
1856 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1857
1858 /* Write TX_HEAD_WRITEBACK_ADDR */
1859 lan743x_csr_write(adapter,
1860 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1861 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1862 lan743x_csr_write(adapter,
1863 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1864 DMA_ADDR_LOW32(tx->head_dma_ptr));
1865
1866 /* set last head */
1867 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1868
1869 /* write TX_TAIL */
1870 tx->last_tail = 0;
1871 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1872 (u32)(tx->last_tail));
1873 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1874 INT_BIT_DMA_TX_
1875 (tx->channel_number));
1876 netif_napi_add(adapter->netdev,
1877 &tx->napi, lan743x_tx_napi_poll,
1878 tx->ring_size - 1);
1879 napi_enable(&tx->napi);
1880
1881 data = 0;
1882 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1883 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1884 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1885 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1886 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1887 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1888 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1889 data |= TX_CFG_C_TX_INT_EN_R2C_;
1890 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1891
1892 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1893 lan743x_csr_write(adapter, INT_EN_SET,
1894 INT_BIT_DMA_TX_(tx->channel_number));
1895 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1896 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1897
1898 /* start dmac channel */
1899 lan743x_csr_write(adapter, DMAC_CMD,
1900 DMAC_CMD_START_T_(tx->channel_number));
1901 return 0;
1902 }
1903
1904 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1905 {
1906 return ((++index) % rx->ring_size);
1907 }
1908
1909 static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
1910 {
1911 struct lan743x_rx_buffer_info *buffer_info;
1912 struct lan743x_rx_descriptor *descriptor;
1913 int length = 0;
1914
1915 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1916 descriptor = &rx->ring_cpu_ptr[index];
1917 buffer_info = &rx->buffer_info[index];
1918 buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
1919 length,
1920 GFP_ATOMIC | GFP_DMA);
1921 if (!(buffer_info->skb))
1922 return -ENOMEM;
1923 buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1924 buffer_info->skb->data,
1925 length,
1926 DMA_FROM_DEVICE);
1927 if (dma_mapping_error(&rx->adapter->pdev->dev,
1928 buffer_info->dma_ptr)) {
1929 buffer_info->dma_ptr = 0;
1930 return -ENOMEM;
1931 }
1932
1933 buffer_info->buffer_length = length;
1934 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1935 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1936 descriptor->data3 = 0;
1937 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1938 (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1939 skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1940
1941 return 0;
1942 }
1943
1944 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1945 {
1946 struct lan743x_rx_buffer_info *buffer_info;
1947 struct lan743x_rx_descriptor *descriptor;
1948
1949 descriptor = &rx->ring_cpu_ptr[index];
1950 buffer_info = &rx->buffer_info[index];
1951
1952 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1953 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1954 descriptor->data3 = 0;
1955 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1956 ((buffer_info->buffer_length) &
1957 RX_DESC_DATA0_BUF_LENGTH_MASK_));
1958 }
1959
1960 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
1961 {
1962 struct lan743x_rx_buffer_info *buffer_info;
1963 struct lan743x_rx_descriptor *descriptor;
1964
1965 descriptor = &rx->ring_cpu_ptr[index];
1966 buffer_info = &rx->buffer_info[index];
1967
1968 memset(descriptor, 0, sizeof(*descriptor));
1969
1970 if (buffer_info->dma_ptr) {
1971 dma_unmap_single(&rx->adapter->pdev->dev,
1972 buffer_info->dma_ptr,
1973 buffer_info->buffer_length,
1974 DMA_FROM_DEVICE);
1975 buffer_info->dma_ptr = 0;
1976 }
1977
1978 if (buffer_info->skb) {
1979 dev_kfree_skb(buffer_info->skb);
1980 buffer_info->skb = NULL;
1981 }
1982
1983 memset(buffer_info, 0, sizeof(*buffer_info));
1984 }
1985
1986 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
1987 {
1988 struct skb_shared_hwtstamps *hwtstamps = NULL;
1989 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
1990 struct lan743x_rx_buffer_info *buffer_info;
1991 struct lan743x_rx_descriptor *descriptor;
1992 int current_head_index = -1;
1993 int extension_index = -1;
1994 int first_index = -1;
1995 int last_index = -1;
1996
1997 current_head_index = *rx->head_cpu_ptr;
1998 if (current_head_index < 0 || current_head_index >= rx->ring_size)
1999 goto done;
2000
2001 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2002 goto done;
2003
2004 if (rx->last_head != current_head_index) {
2005 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2006 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2007 goto done;
2008
2009 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
2010 goto done;
2011
2012 first_index = rx->last_head;
2013 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2014 last_index = rx->last_head;
2015 } else {
2016 int index;
2017
2018 index = lan743x_rx_next_index(rx, first_index);
2019 while (index != current_head_index) {
2020 descriptor = &rx->ring_cpu_ptr[index];
2021 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2022 goto done;
2023
2024 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2025 last_index = index;
2026 break;
2027 }
2028 index = lan743x_rx_next_index(rx, index);
2029 }
2030 }
2031 if (last_index >= 0) {
2032 descriptor = &rx->ring_cpu_ptr[last_index];
2033 if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2034 /* extension is expected to follow */
2035 int index = lan743x_rx_next_index(rx,
2036 last_index);
2037 if (index != current_head_index) {
2038 descriptor = &rx->ring_cpu_ptr[index];
2039 if (descriptor->data0 &
2040 RX_DESC_DATA0_OWN_) {
2041 goto done;
2042 }
2043 if (descriptor->data0 &
2044 RX_DESC_DATA0_EXT_) {
2045 extension_index = index;
2046 } else {
2047 goto done;
2048 }
2049 } else {
2050 /* extension is not yet available */
2051 /* prevent processing of this packet */
2052 first_index = -1;
2053 last_index = -1;
2054 }
2055 }
2056 }
2057 }
2058 if (first_index >= 0 && last_index >= 0) {
2059 int real_last_index = last_index;
2060 struct sk_buff *skb = NULL;
2061 u32 ts_sec = 0;
2062 u32 ts_nsec = 0;
2063
2064 /* packet is available */
2065 if (first_index == last_index) {
2066 /* single buffer packet */
2067 int packet_length;
2068
2069 buffer_info = &rx->buffer_info[first_index];
2070 skb = buffer_info->skb;
2071 descriptor = &rx->ring_cpu_ptr[first_index];
2072
2073 /* unmap from dma */
2074 if (buffer_info->dma_ptr) {
2075 dma_unmap_single(&rx->adapter->pdev->dev,
2076 buffer_info->dma_ptr,
2077 buffer_info->buffer_length,
2078 DMA_FROM_DEVICE);
2079 buffer_info->dma_ptr = 0;
2080 buffer_info->buffer_length = 0;
2081 }
2082 buffer_info->skb = NULL;
2083 packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2084 (descriptor->data0);
2085 skb_put(skb, packet_length - 4);
2086 skb->protocol = eth_type_trans(skb,
2087 rx->adapter->netdev);
2088 lan743x_rx_allocate_ring_element(rx, first_index);
2089 } else {
2090 int index = first_index;
2091
2092 /* multi buffer packet not supported */
2093 /* this should not happen since
2094 * buffers are allocated to be at least jumbo size
2095 */
2096
2097 /* clean up buffers */
2098 if (first_index <= last_index) {
2099 while ((index >= first_index) &&
2100 (index <= last_index)) {
2101 lan743x_rx_release_ring_element(rx,
2102 index);
2103 lan743x_rx_allocate_ring_element(rx,
2104 index);
2105 index = lan743x_rx_next_index(rx,
2106 index);
2107 }
2108 } else {
2109 while ((index >= first_index) ||
2110 (index <= last_index)) {
2111 lan743x_rx_release_ring_element(rx,
2112 index);
2113 lan743x_rx_allocate_ring_element(rx,
2114 index);
2115 index = lan743x_rx_next_index(rx,
2116 index);
2117 }
2118 }
2119 }
2120
2121 if (extension_index >= 0) {
2122 descriptor = &rx->ring_cpu_ptr[extension_index];
2123 buffer_info = &rx->buffer_info[extension_index];
2124
2125 ts_sec = descriptor->data1;
2126 ts_nsec = (descriptor->data2 &
2127 RX_DESC_DATA2_TS_NS_MASK_);
2128 lan743x_rx_reuse_ring_element(rx, extension_index);
2129 real_last_index = extension_index;
2130 }
2131
2132 if (!skb) {
2133 result = RX_PROCESS_RESULT_PACKET_DROPPED;
2134 goto move_forward;
2135 }
2136
2137 if (extension_index < 0)
2138 goto pass_packet_to_os;
2139 hwtstamps = skb_hwtstamps(skb);
2140 if (hwtstamps)
2141 hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2142
2143 pass_packet_to_os:
2144 /* pass packet to OS */
2145 napi_gro_receive(&rx->napi, skb);
2146 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2147
2148 move_forward:
2149 /* push tail and head forward */
2150 rx->last_tail = real_last_index;
2151 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2152 }
2153 done:
2154 return result;
2155 }
2156
2157 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2158 {
2159 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2160 struct lan743x_adapter *adapter = rx->adapter;
2161 u32 rx_tail_flags = 0;
2162 int count;
2163
2164 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2165 /* clear int status bit before reading packet */
2166 lan743x_csr_write(adapter, DMAC_INT_STS,
2167 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2168 }
2169 count = 0;
2170 while (count < weight) {
2171 int rx_process_result = -1;
2172
2173 rx_process_result = lan743x_rx_process_packet(rx);
2174 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2175 count++;
2176 } else if (rx_process_result ==
2177 RX_PROCESS_RESULT_NOTHING_TO_DO) {
2178 break;
2179 } else if (rx_process_result ==
2180 RX_PROCESS_RESULT_PACKET_DROPPED) {
2181 continue;
2182 }
2183 }
2184 rx->frame_count += count;
2185 if (count == weight)
2186 goto done;
2187
2188 if (!napi_complete_done(napi, count))
2189 goto done;
2190
2191 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2192 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2193 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2194 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2195 } else {
2196 lan743x_csr_write(adapter, INT_EN_SET,
2197 INT_BIT_DMA_RX_(rx->channel_number));
2198 }
2199
2200 /* update RX_TAIL */
2201 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2202 rx_tail_flags | rx->last_tail);
2203 done:
2204 return count;
2205 }
2206
2207 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2208 {
2209 if (rx->buffer_info && rx->ring_cpu_ptr) {
2210 int index;
2211
2212 for (index = 0; index < rx->ring_size; index++)
2213 lan743x_rx_release_ring_element(rx, index);
2214 }
2215
2216 if (rx->head_cpu_ptr) {
2217 pci_free_consistent(rx->adapter->pdev,
2218 sizeof(*rx->head_cpu_ptr),
2219 rx->head_cpu_ptr,
2220 rx->head_dma_ptr);
2221 rx->head_cpu_ptr = NULL;
2222 rx->head_dma_ptr = 0;
2223 }
2224
2225 kfree(rx->buffer_info);
2226 rx->buffer_info = NULL;
2227
2228 if (rx->ring_cpu_ptr) {
2229 pci_free_consistent(rx->adapter->pdev,
2230 rx->ring_allocation_size,
2231 rx->ring_cpu_ptr,
2232 rx->ring_dma_ptr);
2233 rx->ring_allocation_size = 0;
2234 rx->ring_cpu_ptr = NULL;
2235 rx->ring_dma_ptr = 0;
2236 }
2237
2238 rx->ring_size = 0;
2239 rx->last_head = 0;
2240 }
2241
2242 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2243 {
2244 size_t ring_allocation_size = 0;
2245 dma_addr_t dma_ptr = 0;
2246 void *cpu_ptr = NULL;
2247 int ret = -ENOMEM;
2248 int index = 0;
2249
2250 rx->ring_size = LAN743X_RX_RING_SIZE;
2251 if (rx->ring_size <= 1) {
2252 ret = -EINVAL;
2253 goto cleanup;
2254 }
2255 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2256 ret = -EINVAL;
2257 goto cleanup;
2258 }
2259 ring_allocation_size = ALIGN(rx->ring_size *
2260 sizeof(struct lan743x_rx_descriptor),
2261 PAGE_SIZE);
2262 dma_ptr = 0;
2263 cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2264 ring_allocation_size, &dma_ptr);
2265 if (!cpu_ptr) {
2266 ret = -ENOMEM;
2267 goto cleanup;
2268 }
2269 rx->ring_allocation_size = ring_allocation_size;
2270 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2271 rx->ring_dma_ptr = dma_ptr;
2272
2273 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2274 GFP_KERNEL);
2275 if (!cpu_ptr) {
2276 ret = -ENOMEM;
2277 goto cleanup;
2278 }
2279 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2280 dma_ptr = 0;
2281 cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
2282 sizeof(*rx->head_cpu_ptr), &dma_ptr);
2283 if (!cpu_ptr) {
2284 ret = -ENOMEM;
2285 goto cleanup;
2286 }
2287
2288 rx->head_cpu_ptr = cpu_ptr;
2289 rx->head_dma_ptr = dma_ptr;
2290 if (rx->head_dma_ptr & 0x3) {
2291 ret = -ENOMEM;
2292 goto cleanup;
2293 }
2294
2295 rx->last_head = 0;
2296 for (index = 0; index < rx->ring_size; index++) {
2297 ret = lan743x_rx_allocate_ring_element(rx, index);
2298 if (ret)
2299 goto cleanup;
2300 }
2301 return 0;
2302
2303 cleanup:
2304 lan743x_rx_ring_cleanup(rx);
2305 return ret;
2306 }
2307
2308 static void lan743x_rx_close(struct lan743x_rx *rx)
2309 {
2310 struct lan743x_adapter *adapter = rx->adapter;
2311
2312 lan743x_csr_write(adapter, FCT_RX_CTL,
2313 FCT_RX_CTL_DIS_(rx->channel_number));
2314 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2315 FCT_RX_CTL_EN_(rx->channel_number),
2316 0, 1000, 20000, 100);
2317
2318 lan743x_csr_write(adapter, DMAC_CMD,
2319 DMAC_CMD_STOP_R_(rx->channel_number));
2320 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2321
2322 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2323 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2324 lan743x_csr_write(adapter, INT_EN_CLR,
2325 INT_BIT_DMA_RX_(rx->channel_number));
2326 napi_disable(&rx->napi);
2327
2328 netif_napi_del(&rx->napi);
2329
2330 lan743x_rx_ring_cleanup(rx);
2331 }
2332
2333 static int lan743x_rx_open(struct lan743x_rx *rx)
2334 {
2335 struct lan743x_adapter *adapter = rx->adapter;
2336 u32 data = 0;
2337 int ret;
2338
2339 rx->frame_count = 0;
2340 ret = lan743x_rx_ring_init(rx);
2341 if (ret)
2342 goto return_error;
2343
2344 netif_napi_add(adapter->netdev,
2345 &rx->napi, lan743x_rx_napi_poll,
2346 rx->ring_size - 1);
2347
2348 lan743x_csr_write(adapter, DMAC_CMD,
2349 DMAC_CMD_RX_SWR_(rx->channel_number));
2350 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2351 DMAC_CMD_RX_SWR_(rx->channel_number),
2352 0, 1000, 20000, 100);
2353
2354 /* set ring base address */
2355 lan743x_csr_write(adapter,
2356 RX_BASE_ADDRH(rx->channel_number),
2357 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2358 lan743x_csr_write(adapter,
2359 RX_BASE_ADDRL(rx->channel_number),
2360 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2361
2362 /* set rx write back address */
2363 lan743x_csr_write(adapter,
2364 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2365 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2366 lan743x_csr_write(adapter,
2367 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2368 DMA_ADDR_LOW32(rx->head_dma_ptr));
2369 data = RX_CFG_A_RX_HP_WB_EN_;
2370 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2371 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2372 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2373 RX_CFG_A_RX_PF_THRES_SET_(16) |
2374 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2375 }
2376
2377 /* set RX_CFG_A */
2378 lan743x_csr_write(adapter,
2379 RX_CFG_A(rx->channel_number), data);
2380
2381 /* set RX_CFG_B */
2382 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2383 data &= ~RX_CFG_B_RX_PAD_MASK_;
2384 if (!RX_HEAD_PADDING)
2385 data |= RX_CFG_B_RX_PAD_0_;
2386 else
2387 data |= RX_CFG_B_RX_PAD_2_;
2388 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2389 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2390 data |= RX_CFG_B_TS_ALL_RX_;
2391 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2392 data |= RX_CFG_B_RDMABL_512_;
2393
2394 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2395 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2396 INT_BIT_DMA_RX_
2397 (rx->channel_number));
2398
2399 /* set RX_CFG_C */
2400 data = 0;
2401 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2402 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2403 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2404 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2405 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2406 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2407 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2408 data |= RX_CFG_C_RX_INT_EN_R2C_;
2409 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2410
2411 rx->last_tail = ((u32)(rx->ring_size - 1));
2412 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2413 rx->last_tail);
2414 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2415 if (rx->last_head) {
2416 ret = -EIO;
2417 goto napi_delete;
2418 }
2419
2420 napi_enable(&rx->napi);
2421
2422 lan743x_csr_write(adapter, INT_EN_SET,
2423 INT_BIT_DMA_RX_(rx->channel_number));
2424 lan743x_csr_write(adapter, DMAC_INT_STS,
2425 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2426 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2427 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2428 lan743x_csr_write(adapter, DMAC_CMD,
2429 DMAC_CMD_START_R_(rx->channel_number));
2430
2431 /* initialize fifo */
2432 lan743x_csr_write(adapter, FCT_RX_CTL,
2433 FCT_RX_CTL_RESET_(rx->channel_number));
2434 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2435 FCT_RX_CTL_RESET_(rx->channel_number),
2436 0, 1000, 20000, 100);
2437 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2438 FCT_FLOW_CTL_REQ_EN_ |
2439 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2440 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2441
2442 /* enable fifo */
2443 lan743x_csr_write(adapter, FCT_RX_CTL,
2444 FCT_RX_CTL_EN_(rx->channel_number));
2445 return 0;
2446
2447 napi_delete:
2448 netif_napi_del(&rx->napi);
2449 lan743x_rx_ring_cleanup(rx);
2450
2451 return_error:
2452 return ret;
2453 }
2454
2455 static int lan743x_netdev_close(struct net_device *netdev)
2456 {
2457 struct lan743x_adapter *adapter = netdev_priv(netdev);
2458 int index;
2459
2460 lan743x_tx_close(&adapter->tx[0]);
2461
2462 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2463 lan743x_rx_close(&adapter->rx[index]);
2464
2465 lan743x_ptp_close(adapter);
2466
2467 lan743x_phy_close(adapter);
2468
2469 lan743x_mac_close(adapter);
2470
2471 lan743x_intr_close(adapter);
2472
2473 return 0;
2474 }
2475
2476 static int lan743x_netdev_open(struct net_device *netdev)
2477 {
2478 struct lan743x_adapter *adapter = netdev_priv(netdev);
2479 int index;
2480 int ret;
2481
2482 ret = lan743x_intr_open(adapter);
2483 if (ret)
2484 goto return_error;
2485
2486 ret = lan743x_mac_open(adapter);
2487 if (ret)
2488 goto close_intr;
2489
2490 ret = lan743x_phy_open(adapter);
2491 if (ret)
2492 goto close_mac;
2493
2494 ret = lan743x_ptp_open(adapter);
2495 if (ret)
2496 goto close_phy;
2497
2498 lan743x_rfe_open(adapter);
2499
2500 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2501 ret = lan743x_rx_open(&adapter->rx[index]);
2502 if (ret)
2503 goto close_rx;
2504 }
2505
2506 ret = lan743x_tx_open(&adapter->tx[0]);
2507 if (ret)
2508 goto close_rx;
2509
2510 return 0;
2511
2512 close_rx:
2513 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2514 if (adapter->rx[index].ring_cpu_ptr)
2515 lan743x_rx_close(&adapter->rx[index]);
2516 }
2517 lan743x_ptp_close(adapter);
2518
2519 close_phy:
2520 lan743x_phy_close(adapter);
2521
2522 close_mac:
2523 lan743x_mac_close(adapter);
2524
2525 close_intr:
2526 lan743x_intr_close(adapter);
2527
2528 return_error:
2529 netif_warn(adapter, ifup, adapter->netdev,
2530 "Error opening LAN743x\n");
2531 return ret;
2532 }
2533
2534 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2535 struct net_device *netdev)
2536 {
2537 struct lan743x_adapter *adapter = netdev_priv(netdev);
2538
2539 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2540 }
2541
2542 static int lan743x_netdev_ioctl(struct net_device *netdev,
2543 struct ifreq *ifr, int cmd)
2544 {
2545 if (!netif_running(netdev))
2546 return -EINVAL;
2547 if (cmd == SIOCSHWTSTAMP)
2548 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2549 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2550 }
2551
2552 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2553 {
2554 struct lan743x_adapter *adapter = netdev_priv(netdev);
2555
2556 lan743x_rfe_set_multicast(adapter);
2557 }
2558
2559 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2560 {
2561 struct lan743x_adapter *adapter = netdev_priv(netdev);
2562 int ret = 0;
2563
2564 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2565 if (!ret)
2566 netdev->mtu = new_mtu;
2567 return ret;
2568 }
2569
2570 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2571 struct rtnl_link_stats64 *stats)
2572 {
2573 struct lan743x_adapter *adapter = netdev_priv(netdev);
2574
2575 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2576 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2577 stats->rx_bytes = lan743x_csr_read(adapter,
2578 STAT_RX_UNICAST_BYTE_COUNT) +
2579 lan743x_csr_read(adapter,
2580 STAT_RX_BROADCAST_BYTE_COUNT) +
2581 lan743x_csr_read(adapter,
2582 STAT_RX_MULTICAST_BYTE_COUNT);
2583 stats->tx_bytes = lan743x_csr_read(adapter,
2584 STAT_TX_UNICAST_BYTE_COUNT) +
2585 lan743x_csr_read(adapter,
2586 STAT_TX_BROADCAST_BYTE_COUNT) +
2587 lan743x_csr_read(adapter,
2588 STAT_TX_MULTICAST_BYTE_COUNT);
2589 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2590 lan743x_csr_read(adapter,
2591 STAT_RX_ALIGNMENT_ERRORS) +
2592 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2593 lan743x_csr_read(adapter,
2594 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2595 lan743x_csr_read(adapter,
2596 STAT_RX_OVERSIZE_FRAME_ERRORS);
2597 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2598 lan743x_csr_read(adapter,
2599 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2600 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2601 stats->rx_dropped = lan743x_csr_read(adapter,
2602 STAT_RX_DROPPED_FRAMES);
2603 stats->tx_dropped = lan743x_csr_read(adapter,
2604 STAT_TX_EXCESSIVE_COLLISION);
2605 stats->multicast = lan743x_csr_read(adapter,
2606 STAT_RX_MULTICAST_FRAMES) +
2607 lan743x_csr_read(adapter,
2608 STAT_TX_MULTICAST_FRAMES);
2609 stats->collisions = lan743x_csr_read(adapter,
2610 STAT_TX_SINGLE_COLLISIONS) +
2611 lan743x_csr_read(adapter,
2612 STAT_TX_MULTIPLE_COLLISIONS) +
2613 lan743x_csr_read(adapter,
2614 STAT_TX_LATE_COLLISIONS);
2615 }
2616
2617 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2618 void *addr)
2619 {
2620 struct lan743x_adapter *adapter = netdev_priv(netdev);
2621 struct sockaddr *sock_addr = addr;
2622 int ret;
2623
2624 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2625 if (ret)
2626 return ret;
2627 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2628 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2629 lan743x_rfe_update_mac_address(adapter);
2630 return 0;
2631 }
2632
2633 static const struct net_device_ops lan743x_netdev_ops = {
2634 .ndo_open = lan743x_netdev_open,
2635 .ndo_stop = lan743x_netdev_close,
2636 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2637 .ndo_do_ioctl = lan743x_netdev_ioctl,
2638 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2639 .ndo_change_mtu = lan743x_netdev_change_mtu,
2640 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2641 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2642 };
2643
2644 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2645 {
2646 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2647 }
2648
2649 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2650 {
2651 mdiobus_unregister(adapter->mdiobus);
2652 }
2653
2654 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2655 {
2656 unregister_netdev(adapter->netdev);
2657
2658 lan743x_mdiobus_cleanup(adapter);
2659 lan743x_hardware_cleanup(adapter);
2660 lan743x_pci_cleanup(adapter);
2661 }
2662
2663 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2664 struct pci_dev *pdev)
2665 {
2666 struct lan743x_tx *tx;
2667 int index;
2668 int ret;
2669
2670 adapter->intr.irq = adapter->pdev->irq;
2671 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2672 mutex_init(&adapter->dp_lock);
2673
2674 ret = lan743x_gpio_init(adapter);
2675 if (ret)
2676 return ret;
2677
2678 ret = lan743x_mac_init(adapter);
2679 if (ret)
2680 return ret;
2681
2682 ret = lan743x_phy_init(adapter);
2683 if (ret)
2684 return ret;
2685
2686 ret = lan743x_ptp_init(adapter);
2687 if (ret)
2688 return ret;
2689
2690 lan743x_rfe_update_mac_address(adapter);
2691
2692 ret = lan743x_dmac_init(adapter);
2693 if (ret)
2694 return ret;
2695
2696 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2697 adapter->rx[index].adapter = adapter;
2698 adapter->rx[index].channel_number = index;
2699 }
2700
2701 tx = &adapter->tx[0];
2702 tx->adapter = adapter;
2703 tx->channel_number = 0;
2704 spin_lock_init(&tx->ring_lock);
2705 return 0;
2706 }
2707
2708 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2709 {
2710 int ret;
2711
2712 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2713 if (!(adapter->mdiobus)) {
2714 ret = -ENOMEM;
2715 goto return_error;
2716 }
2717
2718 adapter->mdiobus->priv = (void *)adapter;
2719 adapter->mdiobus->read = lan743x_mdiobus_read;
2720 adapter->mdiobus->write = lan743x_mdiobus_write;
2721 adapter->mdiobus->name = "lan743x-mdiobus";
2722 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2723 "pci-%s", pci_name(adapter->pdev));
2724
2725 /* set to internal PHY id */
2726 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2727
2728 /* register mdiobus */
2729 ret = mdiobus_register(adapter->mdiobus);
2730 if (ret < 0)
2731 goto return_error;
2732 return 0;
2733
2734 return_error:
2735 return ret;
2736 }
2737
2738 /* lan743x_pcidev_probe - Device Initialization Routine
2739 * @pdev: PCI device information struct
2740 * @id: entry in lan743x_pci_tbl
2741 *
2742 * Returns 0 on success, negative on failure
2743 *
2744 * initializes an adapter identified by a pci_dev structure.
2745 * The OS initialization, configuring of the adapter private structure,
2746 * and a hardware reset occur.
2747 **/
2748 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2749 const struct pci_device_id *id)
2750 {
2751 struct lan743x_adapter *adapter = NULL;
2752 struct net_device *netdev = NULL;
2753 int ret = -ENODEV;
2754
2755 netdev = devm_alloc_etherdev(&pdev->dev,
2756 sizeof(struct lan743x_adapter));
2757 if (!netdev)
2758 goto return_error;
2759
2760 SET_NETDEV_DEV(netdev, &pdev->dev);
2761 pci_set_drvdata(pdev, netdev);
2762 adapter = netdev_priv(netdev);
2763 adapter->netdev = netdev;
2764 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2765 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2766 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2767 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2768
2769 ret = lan743x_pci_init(adapter, pdev);
2770 if (ret)
2771 goto return_error;
2772
2773 ret = lan743x_csr_init(adapter);
2774 if (ret)
2775 goto cleanup_pci;
2776
2777 ret = lan743x_hardware_init(adapter, pdev);
2778 if (ret)
2779 goto cleanup_pci;
2780
2781 ret = lan743x_mdiobus_init(adapter);
2782 if (ret)
2783 goto cleanup_hardware;
2784
2785 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2786 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2787 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2788 adapter->netdev->hw_features = adapter->netdev->features;
2789
2790 /* carrier off reporting is important to ethtool even BEFORE open */
2791 netif_carrier_off(netdev);
2792
2793 ret = register_netdev(adapter->netdev);
2794 if (ret < 0)
2795 goto cleanup_mdiobus;
2796 return 0;
2797
2798 cleanup_mdiobus:
2799 lan743x_mdiobus_cleanup(adapter);
2800
2801 cleanup_hardware:
2802 lan743x_hardware_cleanup(adapter);
2803
2804 cleanup_pci:
2805 lan743x_pci_cleanup(adapter);
2806
2807 return_error:
2808 pr_warn("Initialization failed\n");
2809 return ret;
2810 }
2811
2812 /**
2813 * lan743x_pcidev_remove - Device Removal Routine
2814 * @pdev: PCI device information struct
2815 *
2816 * this is called by the PCI subsystem to alert the driver
2817 * that it should release a PCI device. This could be caused by a
2818 * Hot-Plug event, or because the driver is going to be removed from
2819 * memory.
2820 **/
2821 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2822 {
2823 struct net_device *netdev = pci_get_drvdata(pdev);
2824 struct lan743x_adapter *adapter = netdev_priv(netdev);
2825
2826 lan743x_full_cleanup(adapter);
2827 }
2828
2829 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2830 {
2831 struct net_device *netdev = pci_get_drvdata(pdev);
2832 struct lan743x_adapter *adapter = netdev_priv(netdev);
2833
2834 rtnl_lock();
2835 netif_device_detach(netdev);
2836
2837 /* close netdev when netdev is at running state.
2838 * For instance, it is true when system goes to sleep by pm-suspend
2839 * However, it is false when system goes to sleep by suspend GUI menu
2840 */
2841 if (netif_running(netdev))
2842 lan743x_netdev_close(netdev);
2843 rtnl_unlock();
2844
2845 #ifdef CONFIG_PM
2846 pci_save_state(pdev);
2847 #endif
2848
2849 /* clean up lan743x portion */
2850 lan743x_hardware_cleanup(adapter);
2851 }
2852
2853 #ifdef CONFIG_PM_SLEEP
2854 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2855 {
2856 return bitrev16(crc16(0xFFFF, buf, len));
2857 }
2858
2859 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2860 {
2861 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2862 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2863 const u8 arp_type[2] = { 0x08, 0x06 };
2864 int mask_index;
2865 u32 pmtctl;
2866 u32 wucsr;
2867 u32 macrx;
2868 u16 crc;
2869
2870 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2871 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2872
2873 /* clear wake settings */
2874 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2875 pmtctl |= PMT_CTL_WUPS_MASK_;
2876 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2877 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2878 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2879
2880 macrx = lan743x_csr_read(adapter, MAC_RX);
2881
2882 wucsr = 0;
2883 mask_index = 0;
2884
2885 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2886
2887 if (adapter->wolopts & WAKE_PHY) {
2888 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2889 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2890 }
2891 if (adapter->wolopts & WAKE_MAGIC) {
2892 wucsr |= MAC_WUCSR_MPEN_;
2893 macrx |= MAC_RX_RXEN_;
2894 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2895 }
2896 if (adapter->wolopts & WAKE_UCAST) {
2897 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2898 macrx |= MAC_RX_RXEN_;
2899 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2900 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2901 }
2902 if (adapter->wolopts & WAKE_BCAST) {
2903 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_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_MCAST) {
2909 /* IPv4 multicast */
2910 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2911 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2912 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2913 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2914 (crc & MAC_WUF_CFG_CRC16_MASK_));
2915 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2916 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2917 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2918 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2919 mask_index++;
2920
2921 /* IPv6 multicast */
2922 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2923 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2924 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2925 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2926 (crc & MAC_WUF_CFG_CRC16_MASK_));
2927 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2928 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2929 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2930 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2931 mask_index++;
2932
2933 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2934 macrx |= MAC_RX_RXEN_;
2935 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2936 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2937 }
2938 if (adapter->wolopts & WAKE_ARP) {
2939 /* set MAC_WUF_CFG & WUF_MASK
2940 * for packettype (offset 12,13) = ARP (0x0806)
2941 */
2942 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2943 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2944 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2945 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2946 (crc & MAC_WUF_CFG_CRC16_MASK_));
2947 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2948 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2949 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2950 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2951 mask_index++;
2952
2953 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2954 macrx |= MAC_RX_RXEN_;
2955 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2956 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2957 }
2958
2959 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
2960 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
2961 lan743x_csr_write(adapter, MAC_RX, macrx);
2962 }
2963
2964 static int lan743x_pm_suspend(struct device *dev)
2965 {
2966 struct pci_dev *pdev = to_pci_dev(dev);
2967 struct net_device *netdev = pci_get_drvdata(pdev);
2968 struct lan743x_adapter *adapter = netdev_priv(netdev);
2969 int ret;
2970
2971 lan743x_pcidev_shutdown(pdev);
2972
2973 /* clear all wakes */
2974 lan743x_csr_write(adapter, MAC_WUCSR, 0);
2975 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
2976 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
2977
2978 if (adapter->wolopts)
2979 lan743x_pm_set_wol(adapter);
2980
2981 /* Host sets PME_En, put D3hot */
2982 ret = pci_prepare_to_sleep(pdev);
2983
2984 return 0;
2985 }
2986
2987 static int lan743x_pm_resume(struct device *dev)
2988 {
2989 struct pci_dev *pdev = to_pci_dev(dev);
2990 struct net_device *netdev = pci_get_drvdata(pdev);
2991 struct lan743x_adapter *adapter = netdev_priv(netdev);
2992 int ret;
2993
2994 pci_set_power_state(pdev, PCI_D0);
2995 pci_restore_state(pdev);
2996 pci_save_state(pdev);
2997
2998 ret = lan743x_hardware_init(adapter, pdev);
2999 if (ret) {
3000 netif_err(adapter, probe, adapter->netdev,
3001 "lan743x_hardware_init returned %d\n", ret);
3002 }
3003
3004 /* open netdev when netdev is at running state while resume.
3005 * For instance, it is true when system wakesup after pm-suspend
3006 * However, it is false when system wakes up after suspend GUI menu
3007 */
3008 if (netif_running(netdev))
3009 lan743x_netdev_open(netdev);
3010
3011 netif_device_attach(netdev);
3012
3013 return 0;
3014 }
3015
3016 static const struct dev_pm_ops lan743x_pm_ops = {
3017 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3018 };
3019 #endif /* CONFIG_PM_SLEEP */
3020
3021 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3022 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3023 { 0, }
3024 };
3025
3026 static struct pci_driver lan743x_pcidev_driver = {
3027 .name = DRIVER_NAME,
3028 .id_table = lan743x_pcidev_tbl,
3029 .probe = lan743x_pcidev_probe,
3030 .remove = lan743x_pcidev_remove,
3031 #ifdef CONFIG_PM_SLEEP
3032 .driver.pm = &lan743x_pm_ops,
3033 #endif
3034 .shutdown = lan743x_pcidev_shutdown,
3035 };
3036
3037 module_pci_driver(lan743x_pcidev_driver);
3038
3039 MODULE_AUTHOR(DRIVER_AUTHOR);
3040 MODULE_DESCRIPTION(DRIVER_DESC);
3041 MODULE_LICENSE("GPL");
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