1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* Copyright (C) 2018 Microchip Technology Inc. */
3
4 #include <linux/module.h>
5 #include <linux/pci.h>
6 #include <linux/netdevice.h>
7 #include <linux/etherdevice.h>
8 #include <linux/crc32.h>
9 #include <linux/microchipphy.h>
10 #include <linux/net_tstamp.h>
11 #include <linux/of_mdio.h>
12 #include <linux/of_net.h>
13 #include <linux/phy.h>
14 #include <linux/phy_fixed.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/iopoll.h>
17 #include <linux/crc16.h>
18 #include "lan743x_main.h"
19 #include "lan743x_ethtool.h"
20
lan743x_pci_cleanup(struct lan743x_adapter * adapter)21 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
22 {
23 pci_release_selected_regions(adapter->pdev,
24 pci_select_bars(adapter->pdev,
25 IORESOURCE_MEM));
26 pci_disable_device(adapter->pdev);
27 }
28
lan743x_pci_init(struct lan743x_adapter * adapter,struct pci_dev * pdev)29 static int lan743x_pci_init(struct lan743x_adapter *adapter,
30 struct pci_dev *pdev)
31 {
32 unsigned long bars = 0;
33 int ret;
34
35 adapter->pdev = pdev;
36 ret = pci_enable_device_mem(pdev);
37 if (ret)
38 goto return_error;
39
40 netif_info(adapter, probe, adapter->netdev,
41 "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
42 pdev->vendor, pdev->device);
43 bars = pci_select_bars(pdev, IORESOURCE_MEM);
44 if (!test_bit(0, &bars))
45 goto disable_device;
46
47 ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
48 if (ret)
49 goto disable_device;
50
51 pci_set_master(pdev);
52 return 0;
53
54 disable_device:
55 pci_disable_device(adapter->pdev);
56
57 return_error:
58 return ret;
59 }
60
lan743x_csr_read(struct lan743x_adapter * adapter,int offset)61 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
62 {
63 return ioread32(&adapter->csr.csr_address[offset]);
64 }
65
lan743x_csr_write(struct lan743x_adapter * adapter,int offset,u32 data)66 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
67 u32 data)
68 {
69 iowrite32(data, &adapter->csr.csr_address[offset]);
70 }
71
72 #define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset)
73
lan743x_csr_light_reset(struct lan743x_adapter * adapter)74 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
75 {
76 u32 data;
77
78 data = lan743x_csr_read(adapter, HW_CFG);
79 data |= HW_CFG_LRST_;
80 lan743x_csr_write(adapter, HW_CFG, data);
81
82 return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
83 !(data & HW_CFG_LRST_), 100000, 10000000);
84 }
85
lan743x_csr_wait_for_bit(struct lan743x_adapter * adapter,int offset,u32 bit_mask,int target_value,int usleep_min,int usleep_max,int count)86 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
87 int offset, u32 bit_mask,
88 int target_value, int usleep_min,
89 int usleep_max, int count)
90 {
91 u32 data;
92
93 return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
94 target_value == ((data & bit_mask) ? 1 : 0),
95 usleep_max, usleep_min * count);
96 }
97
lan743x_csr_init(struct lan743x_adapter * adapter)98 static int lan743x_csr_init(struct lan743x_adapter *adapter)
99 {
100 struct lan743x_csr *csr = &adapter->csr;
101 resource_size_t bar_start, bar_length;
102 int result;
103
104 bar_start = pci_resource_start(adapter->pdev, 0);
105 bar_length = pci_resource_len(adapter->pdev, 0);
106 csr->csr_address = devm_ioremap(&adapter->pdev->dev,
107 bar_start, bar_length);
108 if (!csr->csr_address) {
109 result = -ENOMEM;
110 goto clean_up;
111 }
112
113 csr->id_rev = lan743x_csr_read(adapter, ID_REV);
114 csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
115 netif_info(adapter, probe, adapter->netdev,
116 "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
117 csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
118 FPGA_REV_GET_MINOR_(csr->fpga_rev));
119 if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
120 result = -ENODEV;
121 goto clean_up;
122 }
123
124 csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
125 switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
126 case ID_REV_CHIP_REV_A0_:
127 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
128 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
129 break;
130 case ID_REV_CHIP_REV_B0_:
131 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
132 break;
133 }
134
135 result = lan743x_csr_light_reset(adapter);
136 if (result)
137 goto clean_up;
138 return 0;
139 clean_up:
140 return result;
141 }
142
lan743x_intr_software_isr(void * context)143 static void lan743x_intr_software_isr(void *context)
144 {
145 struct lan743x_adapter *adapter = context;
146 struct lan743x_intr *intr = &adapter->intr;
147 u32 int_sts;
148
149 int_sts = lan743x_csr_read(adapter, INT_STS);
150 if (int_sts & INT_BIT_SW_GP_) {
151 /* disable the interrupt to prevent repeated re-triggering */
152 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
153 intr->software_isr_flag = 1;
154 }
155 }
156
lan743x_tx_isr(void * context,u32 int_sts,u32 flags)157 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
158 {
159 struct lan743x_tx *tx = context;
160 struct lan743x_adapter *adapter = tx->adapter;
161 bool enable_flag = true;
162
163 lan743x_csr_read(adapter, INT_EN_SET);
164 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
165 lan743x_csr_write(adapter, INT_EN_CLR,
166 INT_BIT_DMA_TX_(tx->channel_number));
167 }
168
169 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
170 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
171 u32 dmac_int_sts;
172 u32 dmac_int_en;
173
174 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
175 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
176 else
177 dmac_int_sts = ioc_bit;
178 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
179 dmac_int_en = lan743x_csr_read(adapter,
180 DMAC_INT_EN_SET);
181 else
182 dmac_int_en = ioc_bit;
183
184 dmac_int_en &= ioc_bit;
185 dmac_int_sts &= dmac_int_en;
186 if (dmac_int_sts & ioc_bit) {
187 napi_schedule(&tx->napi);
188 enable_flag = false;/* poll func will enable later */
189 }
190 }
191
192 if (enable_flag)
193 /* enable isr */
194 lan743x_csr_write(adapter, INT_EN_SET,
195 INT_BIT_DMA_TX_(tx->channel_number));
196 }
197
lan743x_rx_isr(void * context,u32 int_sts,u32 flags)198 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
199 {
200 struct lan743x_rx *rx = context;
201 struct lan743x_adapter *adapter = rx->adapter;
202 bool enable_flag = true;
203
204 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
205 lan743x_csr_write(adapter, INT_EN_CLR,
206 INT_BIT_DMA_RX_(rx->channel_number));
207 }
208
209 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
210 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
211 u32 dmac_int_sts;
212 u32 dmac_int_en;
213
214 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
215 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
216 else
217 dmac_int_sts = rx_frame_bit;
218 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
219 dmac_int_en = lan743x_csr_read(adapter,
220 DMAC_INT_EN_SET);
221 else
222 dmac_int_en = rx_frame_bit;
223
224 dmac_int_en &= rx_frame_bit;
225 dmac_int_sts &= dmac_int_en;
226 if (dmac_int_sts & rx_frame_bit) {
227 napi_schedule(&rx->napi);
228 enable_flag = false;/* poll funct will enable later */
229 }
230 }
231
232 if (enable_flag) {
233 /* enable isr */
234 lan743x_csr_write(adapter, INT_EN_SET,
235 INT_BIT_DMA_RX_(rx->channel_number));
236 }
237 }
238
lan743x_intr_shared_isr(void * context,u32 int_sts,u32 flags)239 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
240 {
241 struct lan743x_adapter *adapter = context;
242 unsigned int channel;
243
244 if (int_sts & INT_BIT_ALL_RX_) {
245 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
246 channel++) {
247 u32 int_bit = INT_BIT_DMA_RX_(channel);
248
249 if (int_sts & int_bit) {
250 lan743x_rx_isr(&adapter->rx[channel],
251 int_bit, flags);
252 int_sts &= ~int_bit;
253 }
254 }
255 }
256 if (int_sts & INT_BIT_ALL_TX_) {
257 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
258 channel++) {
259 u32 int_bit = INT_BIT_DMA_TX_(channel);
260
261 if (int_sts & int_bit) {
262 lan743x_tx_isr(&adapter->tx[channel],
263 int_bit, flags);
264 int_sts &= ~int_bit;
265 }
266 }
267 }
268 if (int_sts & INT_BIT_ALL_OTHER_) {
269 if (int_sts & INT_BIT_SW_GP_) {
270 lan743x_intr_software_isr(adapter);
271 int_sts &= ~INT_BIT_SW_GP_;
272 }
273 if (int_sts & INT_BIT_1588_) {
274 lan743x_ptp_isr(adapter);
275 int_sts &= ~INT_BIT_1588_;
276 }
277 }
278 if (int_sts)
279 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
280 }
281
lan743x_intr_entry_isr(int irq,void * ptr)282 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
283 {
284 struct lan743x_vector *vector = ptr;
285 struct lan743x_adapter *adapter = vector->adapter;
286 irqreturn_t result = IRQ_NONE;
287 u32 int_enables;
288 u32 int_sts;
289
290 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
291 int_sts = lan743x_csr_read(adapter, INT_STS);
292 } else if (vector->flags &
293 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
294 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
295 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
296 } else {
297 /* use mask as implied status */
298 int_sts = vector->int_mask | INT_BIT_MAS_;
299 }
300
301 if (!(int_sts & INT_BIT_MAS_))
302 goto irq_done;
303
304 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
305 /* disable vector interrupt */
306 lan743x_csr_write(adapter,
307 INT_VEC_EN_CLR,
308 INT_VEC_EN_(vector->vector_index));
309
310 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
311 /* disable master interrupt */
312 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
313
314 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
315 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
316 } else {
317 /* use vector mask as implied enable mask */
318 int_enables = vector->int_mask;
319 }
320
321 int_sts &= int_enables;
322 int_sts &= vector->int_mask;
323 if (int_sts) {
324 if (vector->handler) {
325 vector->handler(vector->context,
326 int_sts, vector->flags);
327 } else {
328 /* disable interrupts on this vector */
329 lan743x_csr_write(adapter, INT_EN_CLR,
330 vector->int_mask);
331 }
332 result = IRQ_HANDLED;
333 }
334
335 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
336 /* enable master interrupt */
337 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
338
339 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
340 /* enable vector interrupt */
341 lan743x_csr_write(adapter,
342 INT_VEC_EN_SET,
343 INT_VEC_EN_(vector->vector_index));
344 irq_done:
345 return result;
346 }
347
lan743x_intr_test_isr(struct lan743x_adapter * adapter)348 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
349 {
350 struct lan743x_intr *intr = &adapter->intr;
351 int result = -ENODEV;
352 int timeout = 10;
353
354 intr->software_isr_flag = 0;
355
356 /* enable interrupt */
357 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
358
359 /* activate interrupt here */
360 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
361 while ((timeout > 0) && (!(intr->software_isr_flag))) {
362 usleep_range(1000, 20000);
363 timeout--;
364 }
365
366 if (intr->software_isr_flag)
367 result = 0;
368
369 /* disable interrupts */
370 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
371 return result;
372 }
373
lan743x_intr_register_isr(struct lan743x_adapter * adapter,int vector_index,u32 flags,u32 int_mask,lan743x_vector_handler handler,void * context)374 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
375 int vector_index, u32 flags,
376 u32 int_mask,
377 lan743x_vector_handler handler,
378 void *context)
379 {
380 struct lan743x_vector *vector = &adapter->intr.vector_list
381 [vector_index];
382 int ret;
383
384 vector->adapter = adapter;
385 vector->flags = flags;
386 vector->vector_index = vector_index;
387 vector->int_mask = int_mask;
388 vector->handler = handler;
389 vector->context = context;
390
391 ret = request_irq(vector->irq,
392 lan743x_intr_entry_isr,
393 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
394 IRQF_SHARED : 0, DRIVER_NAME, vector);
395 if (ret) {
396 vector->handler = NULL;
397 vector->context = NULL;
398 vector->int_mask = 0;
399 vector->flags = 0;
400 }
401 return ret;
402 }
403
lan743x_intr_unregister_isr(struct lan743x_adapter * adapter,int vector_index)404 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
405 int vector_index)
406 {
407 struct lan743x_vector *vector = &adapter->intr.vector_list
408 [vector_index];
409
410 free_irq(vector->irq, vector);
411 vector->handler = NULL;
412 vector->context = NULL;
413 vector->int_mask = 0;
414 vector->flags = 0;
415 }
416
lan743x_intr_get_vector_flags(struct lan743x_adapter * adapter,u32 int_mask)417 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
418 u32 int_mask)
419 {
420 int index;
421
422 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
423 if (adapter->intr.vector_list[index].int_mask & int_mask)
424 return adapter->intr.vector_list[index].flags;
425 }
426 return 0;
427 }
428
lan743x_intr_close(struct lan743x_adapter * adapter)429 static void lan743x_intr_close(struct lan743x_adapter *adapter)
430 {
431 struct lan743x_intr *intr = &adapter->intr;
432 int index = 0;
433
434 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
435 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
436
437 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
438 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
439 lan743x_intr_unregister_isr(adapter, index);
440 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
441 }
442 }
443
444 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
445 pci_disable_msi(adapter->pdev);
446 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
447 }
448
449 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
450 pci_disable_msix(adapter->pdev);
451 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
452 }
453 }
454
lan743x_intr_open(struct lan743x_adapter * adapter)455 static int lan743x_intr_open(struct lan743x_adapter *adapter)
456 {
457 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
458 struct lan743x_intr *intr = &adapter->intr;
459 u32 int_vec_en_auto_clr = 0;
460 u32 int_vec_map0 = 0;
461 u32 int_vec_map1 = 0;
462 int ret = -ENODEV;
463 int index = 0;
464 u32 flags = 0;
465
466 intr->number_of_vectors = 0;
467
468 /* Try to set up MSIX interrupts */
469 memset(&msix_entries[0], 0,
470 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
471 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
472 msix_entries[index].entry = index;
473 ret = pci_enable_msix_range(adapter->pdev,
474 msix_entries, 1,
475 1 + LAN743X_USED_TX_CHANNELS +
476 LAN743X_USED_RX_CHANNELS);
477
478 if (ret > 0) {
479 intr->flags |= INTR_FLAG_MSIX_ENABLED;
480 intr->number_of_vectors = ret;
481 intr->using_vectors = true;
482 for (index = 0; index < intr->number_of_vectors; index++)
483 intr->vector_list[index].irq = msix_entries
484 [index].vector;
485 netif_info(adapter, ifup, adapter->netdev,
486 "using MSIX interrupts, number of vectors = %d\n",
487 intr->number_of_vectors);
488 }
489
490 /* If MSIX failed try to setup using MSI interrupts */
491 if (!intr->number_of_vectors) {
492 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
493 if (!pci_enable_msi(adapter->pdev)) {
494 intr->flags |= INTR_FLAG_MSI_ENABLED;
495 intr->number_of_vectors = 1;
496 intr->using_vectors = true;
497 intr->vector_list[0].irq =
498 adapter->pdev->irq;
499 netif_info(adapter, ifup, adapter->netdev,
500 "using MSI interrupts, number of vectors = %d\n",
501 intr->number_of_vectors);
502 }
503 }
504 }
505
506 /* If MSIX, and MSI failed, setup using legacy interrupt */
507 if (!intr->number_of_vectors) {
508 intr->number_of_vectors = 1;
509 intr->using_vectors = false;
510 intr->vector_list[0].irq = intr->irq;
511 netif_info(adapter, ifup, adapter->netdev,
512 "using legacy interrupts\n");
513 }
514
515 /* At this point we must have at least one irq */
516 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
517
518 /* map all interrupts to vector 0 */
519 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
520 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
521 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
522 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
523 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
524 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
525 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
526
527 if (intr->using_vectors) {
528 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
529 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
530 } else {
531 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
532 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
533 LAN743X_VECTOR_FLAG_IRQ_SHARED;
534 }
535
536 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
537 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
538 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
539 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
540 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
541 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
542 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
543 }
544
545 ret = lan743x_intr_register_isr(adapter, 0, flags,
546 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
547 INT_BIT_ALL_OTHER_,
548 lan743x_intr_shared_isr, adapter);
549 if (ret)
550 goto clean_up;
551 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
552
553 if (intr->using_vectors)
554 lan743x_csr_write(adapter, INT_VEC_EN_SET,
555 INT_VEC_EN_(0));
556
557 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
558 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
559 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
560 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
561 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
562 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
563 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
564 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
565 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
566 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
567 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
568 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
569 }
570
571 /* enable interrupts */
572 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
573 ret = lan743x_intr_test_isr(adapter);
574 if (ret)
575 goto clean_up;
576
577 if (intr->number_of_vectors > 1) {
578 int number_of_tx_vectors = intr->number_of_vectors - 1;
579
580 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
581 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
582 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
583 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
584 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
585 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
586 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
587 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
588
589 if (adapter->csr.flags &
590 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
591 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
592 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
593 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
594 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
595 }
596
597 for (index = 0; index < number_of_tx_vectors; index++) {
598 u32 int_bit = INT_BIT_DMA_TX_(index);
599 int vector = index + 1;
600
601 /* map TX interrupt to vector */
602 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
603 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
604
605 /* Remove TX interrupt from shared mask */
606 intr->vector_list[0].int_mask &= ~int_bit;
607 ret = lan743x_intr_register_isr(adapter, vector, flags,
608 int_bit, lan743x_tx_isr,
609 &adapter->tx[index]);
610 if (ret)
611 goto clean_up;
612 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
613 if (!(flags &
614 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
615 lan743x_csr_write(adapter, INT_VEC_EN_SET,
616 INT_VEC_EN_(vector));
617 }
618 }
619 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
620 int number_of_rx_vectors = intr->number_of_vectors -
621 LAN743X_USED_TX_CHANNELS - 1;
622
623 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
624 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
625
626 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
627 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
628 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
629 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
630 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
631 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
632
633 if (adapter->csr.flags &
634 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
635 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
636 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
637 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
638 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
639 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
640 }
641 for (index = 0; index < number_of_rx_vectors; index++) {
642 int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
643 u32 int_bit = INT_BIT_DMA_RX_(index);
644
645 /* map RX interrupt to vector */
646 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
647 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
648 if (flags &
649 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
650 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
651 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
652 int_vec_en_auto_clr);
653 }
654
655 /* Remove RX interrupt from shared mask */
656 intr->vector_list[0].int_mask &= ~int_bit;
657 ret = lan743x_intr_register_isr(adapter, vector, flags,
658 int_bit, lan743x_rx_isr,
659 &adapter->rx[index]);
660 if (ret)
661 goto clean_up;
662 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
663
664 lan743x_csr_write(adapter, INT_VEC_EN_SET,
665 INT_VEC_EN_(vector));
666 }
667 }
668 return 0;
669
670 clean_up:
671 lan743x_intr_close(adapter);
672 return ret;
673 }
674
lan743x_dp_write(struct lan743x_adapter * adapter,u32 select,u32 addr,u32 length,u32 * buf)675 static int lan743x_dp_write(struct lan743x_adapter *adapter,
676 u32 select, u32 addr, u32 length, u32 *buf)
677 {
678 u32 dp_sel;
679 int i;
680
681 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
682 1, 40, 100, 100))
683 return -EIO;
684 dp_sel = lan743x_csr_read(adapter, DP_SEL);
685 dp_sel &= ~DP_SEL_MASK_;
686 dp_sel |= select;
687 lan743x_csr_write(adapter, DP_SEL, dp_sel);
688
689 for (i = 0; i < length; i++) {
690 lan743x_csr_write(adapter, DP_ADDR, addr + i);
691 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
692 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
693 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
694 1, 40, 100, 100))
695 return -EIO;
696 }
697
698 return 0;
699 }
700
lan743x_mac_mii_access(u16 id,u16 index,int read)701 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
702 {
703 u32 ret;
704
705 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
706 MAC_MII_ACC_PHY_ADDR_MASK_;
707 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
708 MAC_MII_ACC_MIIRINDA_MASK_;
709
710 if (read)
711 ret |= MAC_MII_ACC_MII_READ_;
712 else
713 ret |= MAC_MII_ACC_MII_WRITE_;
714 ret |= MAC_MII_ACC_MII_BUSY_;
715
716 return ret;
717 }
718
lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter * adapter)719 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
720 {
721 u32 data;
722
723 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
724 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
725 }
726
lan743x_mdiobus_read(struct mii_bus * bus,int phy_id,int index)727 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
728 {
729 struct lan743x_adapter *adapter = bus->priv;
730 u32 val, mii_access;
731 int ret;
732
733 /* comfirm MII not busy */
734 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
735 if (ret < 0)
736 return ret;
737
738 /* set the address, index & direction (read from PHY) */
739 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
740 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
741 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
742 if (ret < 0)
743 return ret;
744
745 val = lan743x_csr_read(adapter, MAC_MII_DATA);
746 return (int)(val & 0xFFFF);
747 }
748
lan743x_mdiobus_write(struct mii_bus * bus,int phy_id,int index,u16 regval)749 static int lan743x_mdiobus_write(struct mii_bus *bus,
750 int phy_id, int index, u16 regval)
751 {
752 struct lan743x_adapter *adapter = bus->priv;
753 u32 val, mii_access;
754 int ret;
755
756 /* confirm MII not busy */
757 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
758 if (ret < 0)
759 return ret;
760 val = (u32)regval;
761 lan743x_csr_write(adapter, MAC_MII_DATA, val);
762
763 /* set the address, index & direction (write to PHY) */
764 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
765 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
766 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
767 return ret;
768 }
769
lan743x_mac_set_address(struct lan743x_adapter * adapter,u8 * addr)770 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
771 u8 *addr)
772 {
773 u32 addr_lo, addr_hi;
774
775 addr_lo = addr[0] |
776 addr[1] << 8 |
777 addr[2] << 16 |
778 addr[3] << 24;
779 addr_hi = addr[4] |
780 addr[5] << 8;
781 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
782 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
783
784 ether_addr_copy(adapter->mac_address, addr);
785 netif_info(adapter, drv, adapter->netdev,
786 "MAC address set to %pM\n", addr);
787 }
788
lan743x_mac_init(struct lan743x_adapter * adapter)789 static int lan743x_mac_init(struct lan743x_adapter *adapter)
790 {
791 bool mac_address_valid = true;
792 struct net_device *netdev;
793 u32 mac_addr_hi = 0;
794 u32 mac_addr_lo = 0;
795 u32 data;
796
797 netdev = adapter->netdev;
798
799 /* disable auto duplex, and speed detection. Phylib does that */
800 data = lan743x_csr_read(adapter, MAC_CR);
801 data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
802 data |= MAC_CR_CNTR_RST_;
803 lan743x_csr_write(adapter, MAC_CR, data);
804
805 if (!is_valid_ether_addr(adapter->mac_address)) {
806 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
807 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
808 adapter->mac_address[0] = mac_addr_lo & 0xFF;
809 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
810 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
811 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
812 adapter->mac_address[4] = mac_addr_hi & 0xFF;
813 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
814
815 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
816 mac_addr_lo == 0xFFFFFFFF) {
817 mac_address_valid = false;
818 } else if (!is_valid_ether_addr(adapter->mac_address)) {
819 mac_address_valid = false;
820 }
821
822 if (!mac_address_valid)
823 eth_random_addr(adapter->mac_address);
824 }
825 lan743x_mac_set_address(adapter, adapter->mac_address);
826 ether_addr_copy(netdev->dev_addr, adapter->mac_address);
827
828 return 0;
829 }
830
lan743x_mac_open(struct lan743x_adapter * adapter)831 static int lan743x_mac_open(struct lan743x_adapter *adapter)
832 {
833 int ret = 0;
834 u32 temp;
835
836 temp = lan743x_csr_read(adapter, MAC_RX);
837 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
838 temp = lan743x_csr_read(adapter, MAC_TX);
839 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
840 return ret;
841 }
842
lan743x_mac_close(struct lan743x_adapter * adapter)843 static void lan743x_mac_close(struct lan743x_adapter *adapter)
844 {
845 u32 temp;
846
847 temp = lan743x_csr_read(adapter, MAC_TX);
848 temp &= ~MAC_TX_TXEN_;
849 lan743x_csr_write(adapter, MAC_TX, temp);
850 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
851 1, 1000, 20000, 100);
852
853 temp = lan743x_csr_read(adapter, MAC_RX);
854 temp &= ~MAC_RX_RXEN_;
855 lan743x_csr_write(adapter, MAC_RX, temp);
856 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
857 1, 1000, 20000, 100);
858 }
859
lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter * adapter,bool tx_enable,bool rx_enable)860 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
861 bool tx_enable, bool rx_enable)
862 {
863 u32 flow_setting = 0;
864
865 /* set maximum pause time because when fifo space frees
866 * up a zero value pause frame will be sent to release the pause
867 */
868 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
869 if (tx_enable)
870 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
871 if (rx_enable)
872 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
873 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
874 }
875
lan743x_mac_set_mtu(struct lan743x_adapter * adapter,int new_mtu)876 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
877 {
878 int enabled = 0;
879 u32 mac_rx = 0;
880
881 mac_rx = lan743x_csr_read(adapter, MAC_RX);
882 if (mac_rx & MAC_RX_RXEN_) {
883 enabled = 1;
884 if (mac_rx & MAC_RX_RXD_) {
885 lan743x_csr_write(adapter, MAC_RX, mac_rx);
886 mac_rx &= ~MAC_RX_RXD_;
887 }
888 mac_rx &= ~MAC_RX_RXEN_;
889 lan743x_csr_write(adapter, MAC_RX, mac_rx);
890 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
891 1, 1000, 20000, 100);
892 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
893 }
894
895 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
896 mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
897 MAC_RX_MAX_SIZE_MASK_);
898 lan743x_csr_write(adapter, MAC_RX, mac_rx);
899
900 if (enabled) {
901 mac_rx |= MAC_RX_RXEN_;
902 lan743x_csr_write(adapter, MAC_RX, mac_rx);
903 }
904 return 0;
905 }
906
907 /* PHY */
lan743x_phy_reset(struct lan743x_adapter * adapter)908 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
909 {
910 u32 data;
911
912 /* Only called with in probe, and before mdiobus_register */
913
914 data = lan743x_csr_read(adapter, PMT_CTL);
915 data |= PMT_CTL_ETH_PHY_RST_;
916 lan743x_csr_write(adapter, PMT_CTL, data);
917
918 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
919 (!(data & PMT_CTL_ETH_PHY_RST_) &&
920 (data & PMT_CTL_READY_)),
921 50000, 1000000);
922 }
923
lan743x_phy_update_flowcontrol(struct lan743x_adapter * adapter,u16 local_adv,u16 remote_adv)924 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
925 u16 local_adv, u16 remote_adv)
926 {
927 struct lan743x_phy *phy = &adapter->phy;
928 u8 cap;
929
930 if (phy->fc_autoneg)
931 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
932 else
933 cap = phy->fc_request_control;
934
935 lan743x_mac_flow_ctrl_set_enables(adapter,
936 cap & FLOW_CTRL_TX,
937 cap & FLOW_CTRL_RX);
938 }
939
lan743x_phy_init(struct lan743x_adapter * adapter)940 static int lan743x_phy_init(struct lan743x_adapter *adapter)
941 {
942 return lan743x_phy_reset(adapter);
943 }
944
lan743x_phy_link_status_change(struct net_device * netdev)945 static void lan743x_phy_link_status_change(struct net_device *netdev)
946 {
947 struct lan743x_adapter *adapter = netdev_priv(netdev);
948 struct phy_device *phydev = netdev->phydev;
949 u32 data;
950
951 phy_print_status(phydev);
952 if (phydev->state == PHY_RUNNING) {
953 int remote_advertisement = 0;
954 int local_advertisement = 0;
955
956 data = lan743x_csr_read(adapter, MAC_CR);
957
958 /* set interface mode */
959 if (phy_interface_mode_is_rgmii(adapter->phy_mode))
960 /* RGMII */
961 data &= ~MAC_CR_MII_EN_;
962 else
963 /* GMII */
964 data |= MAC_CR_MII_EN_;
965
966 /* set duplex mode */
967 if (phydev->duplex)
968 data |= MAC_CR_DPX_;
969 else
970 data &= ~MAC_CR_DPX_;
971
972 /* set bus speed */
973 switch (phydev->speed) {
974 case SPEED_10:
975 data &= ~MAC_CR_CFG_H_;
976 data &= ~MAC_CR_CFG_L_;
977 break;
978 case SPEED_100:
979 data &= ~MAC_CR_CFG_H_;
980 data |= MAC_CR_CFG_L_;
981 break;
982 case SPEED_1000:
983 data |= MAC_CR_CFG_H_;
984 data &= ~MAC_CR_CFG_L_;
985 break;
986 }
987 lan743x_csr_write(adapter, MAC_CR, data);
988
989 local_advertisement =
990 linkmode_adv_to_mii_adv_t(phydev->advertising);
991 remote_advertisement =
992 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
993
994 lan743x_phy_update_flowcontrol(adapter, local_advertisement,
995 remote_advertisement);
996 lan743x_ptp_update_latency(adapter, phydev->speed);
997 }
998 }
999
lan743x_phy_close(struct lan743x_adapter * adapter)1000 static void lan743x_phy_close(struct lan743x_adapter *adapter)
1001 {
1002 struct net_device *netdev = adapter->netdev;
1003
1004 phy_stop(netdev->phydev);
1005 phy_disconnect(netdev->phydev);
1006 netdev->phydev = NULL;
1007 }
1008
lan743x_phy_open(struct lan743x_adapter * adapter)1009 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1010 {
1011 struct lan743x_phy *phy = &adapter->phy;
1012 struct phy_device *phydev = NULL;
1013 struct device_node *phynode;
1014 struct net_device *netdev;
1015 int ret = -EIO;
1016
1017 netdev = adapter->netdev;
1018 phynode = of_node_get(adapter->pdev->dev.of_node);
1019
1020 if (phynode) {
1021 /* try devicetree phy, or fixed link */
1022 of_get_phy_mode(phynode, &adapter->phy_mode);
1023
1024 if (of_phy_is_fixed_link(phynode)) {
1025 ret = of_phy_register_fixed_link(phynode);
1026 if (ret) {
1027 netdev_err(netdev,
1028 "cannot register fixed PHY\n");
1029 of_node_put(phynode);
1030 goto return_error;
1031 }
1032 }
1033 phydev = of_phy_connect(netdev, phynode,
1034 lan743x_phy_link_status_change, 0,
1035 adapter->phy_mode);
1036 of_node_put(phynode);
1037 }
1038
1039 if (!phydev) {
1040 /* try internal phy */
1041 phydev = phy_find_first(adapter->mdiobus);
1042 if (!phydev)
1043 goto return_error;
1044
1045 adapter->phy_mode = PHY_INTERFACE_MODE_GMII;
1046 ret = phy_connect_direct(netdev, phydev,
1047 lan743x_phy_link_status_change,
1048 adapter->phy_mode);
1049 if (ret)
1050 goto return_error;
1051 }
1052
1053 /* MAC doesn't support 1000T Half */
1054 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1055
1056 /* support both flow controls */
1057 phy_support_asym_pause(phydev);
1058 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1059 phy->fc_autoneg = phydev->autoneg;
1060
1061 phy_start(phydev);
1062 phy_start_aneg(phydev);
1063 return 0;
1064
1065 return_error:
1066 return ret;
1067 }
1068
lan743x_rfe_open(struct lan743x_adapter * adapter)1069 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1070 {
1071 lan743x_csr_write(adapter, RFE_RSS_CFG,
1072 RFE_RSS_CFG_UDP_IPV6_EX_ |
1073 RFE_RSS_CFG_TCP_IPV6_EX_ |
1074 RFE_RSS_CFG_IPV6_EX_ |
1075 RFE_RSS_CFG_UDP_IPV6_ |
1076 RFE_RSS_CFG_TCP_IPV6_ |
1077 RFE_RSS_CFG_IPV6_ |
1078 RFE_RSS_CFG_UDP_IPV4_ |
1079 RFE_RSS_CFG_TCP_IPV4_ |
1080 RFE_RSS_CFG_IPV4_ |
1081 RFE_RSS_CFG_VALID_HASH_BITS_ |
1082 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1083 RFE_RSS_CFG_RSS_HASH_STORE_ |
1084 RFE_RSS_CFG_RSS_ENABLE_);
1085 }
1086
lan743x_rfe_update_mac_address(struct lan743x_adapter * adapter)1087 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1088 {
1089 u8 *mac_addr;
1090 u32 mac_addr_hi = 0;
1091 u32 mac_addr_lo = 0;
1092
1093 /* Add mac address to perfect Filter */
1094 mac_addr = adapter->mac_address;
1095 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1096 (((u32)(mac_addr[1])) << 8) |
1097 (((u32)(mac_addr[2])) << 16) |
1098 (((u32)(mac_addr[3])) << 24));
1099 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1100 (((u32)(mac_addr[5])) << 8));
1101
1102 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1103 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1104 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1105 }
1106
lan743x_rfe_set_multicast(struct lan743x_adapter * adapter)1107 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1108 {
1109 struct net_device *netdev = adapter->netdev;
1110 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1111 u32 rfctl;
1112 u32 data;
1113
1114 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1115 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1116 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1117 rfctl |= RFE_CTL_AB_;
1118 if (netdev->flags & IFF_PROMISC) {
1119 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1120 } else {
1121 if (netdev->flags & IFF_ALLMULTI)
1122 rfctl |= RFE_CTL_AM_;
1123 }
1124
1125 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1126 if (netdev_mc_count(netdev)) {
1127 struct netdev_hw_addr *ha;
1128 int i;
1129
1130 rfctl |= RFE_CTL_DA_PERFECT_;
1131 i = 1;
1132 netdev_for_each_mc_addr(ha, netdev) {
1133 /* set first 32 into Perfect Filter */
1134 if (i < 33) {
1135 lan743x_csr_write(adapter,
1136 RFE_ADDR_FILT_HI(i), 0);
1137 data = ha->addr[3];
1138 data = ha->addr[2] | (data << 8);
1139 data = ha->addr[1] | (data << 8);
1140 data = ha->addr[0] | (data << 8);
1141 lan743x_csr_write(adapter,
1142 RFE_ADDR_FILT_LO(i), data);
1143 data = ha->addr[5];
1144 data = ha->addr[4] | (data << 8);
1145 data |= RFE_ADDR_FILT_HI_VALID_;
1146 lan743x_csr_write(adapter,
1147 RFE_ADDR_FILT_HI(i), data);
1148 } else {
1149 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1150 23) & 0x1FF;
1151 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1152 rfctl |= RFE_CTL_MCAST_HASH_;
1153 }
1154 i++;
1155 }
1156 }
1157
1158 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1159 DP_SEL_VHF_VLAN_LEN,
1160 DP_SEL_VHF_HASH_LEN, hash_table);
1161 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1162 }
1163
lan743x_dmac_init(struct lan743x_adapter * adapter)1164 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1165 {
1166 u32 data = 0;
1167
1168 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1169 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1170 0, 1000, 20000, 100);
1171 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1172 case DMA_DESCRIPTOR_SPACING_16:
1173 data = DMAC_CFG_MAX_DSPACE_16_;
1174 break;
1175 case DMA_DESCRIPTOR_SPACING_32:
1176 data = DMAC_CFG_MAX_DSPACE_32_;
1177 break;
1178 case DMA_DESCRIPTOR_SPACING_64:
1179 data = DMAC_CFG_MAX_DSPACE_64_;
1180 break;
1181 case DMA_DESCRIPTOR_SPACING_128:
1182 data = DMAC_CFG_MAX_DSPACE_128_;
1183 break;
1184 default:
1185 return -EPERM;
1186 }
1187 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1188 data |= DMAC_CFG_COAL_EN_;
1189 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1190 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1191 lan743x_csr_write(adapter, DMAC_CFG, data);
1192 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1193 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1194 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1195 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1196 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1197 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1198 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1199 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1200 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1201 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1202 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1203 return 0;
1204 }
1205
lan743x_dmac_tx_get_state(struct lan743x_adapter * adapter,int tx_channel)1206 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1207 int tx_channel)
1208 {
1209 u32 dmac_cmd = 0;
1210
1211 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1212 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1213 DMAC_CMD_START_T_(tx_channel)),
1214 (dmac_cmd &
1215 DMAC_CMD_STOP_T_(tx_channel)));
1216 }
1217
lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter * adapter,int tx_channel)1218 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1219 int tx_channel)
1220 {
1221 int timeout = 100;
1222 int result = 0;
1223
1224 while (timeout &&
1225 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1226 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1227 usleep_range(1000, 20000);
1228 timeout--;
1229 }
1230 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1231 result = -ENODEV;
1232 return result;
1233 }
1234
lan743x_dmac_rx_get_state(struct lan743x_adapter * adapter,int rx_channel)1235 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1236 int rx_channel)
1237 {
1238 u32 dmac_cmd = 0;
1239
1240 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1241 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1242 DMAC_CMD_START_R_(rx_channel)),
1243 (dmac_cmd &
1244 DMAC_CMD_STOP_R_(rx_channel)));
1245 }
1246
lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter * adapter,int rx_channel)1247 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1248 int rx_channel)
1249 {
1250 int timeout = 100;
1251 int result = 0;
1252
1253 while (timeout &&
1254 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1255 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1256 usleep_range(1000, 20000);
1257 timeout--;
1258 }
1259 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1260 result = -ENODEV;
1261 return result;
1262 }
1263
lan743x_tx_release_desc(struct lan743x_tx * tx,int descriptor_index,bool cleanup)1264 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1265 int descriptor_index, bool cleanup)
1266 {
1267 struct lan743x_tx_buffer_info *buffer_info = NULL;
1268 struct lan743x_tx_descriptor *descriptor = NULL;
1269 u32 descriptor_type = 0;
1270 bool ignore_sync;
1271
1272 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1273 buffer_info = &tx->buffer_info[descriptor_index];
1274 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1275 goto done;
1276
1277 descriptor_type = le32_to_cpu(descriptor->data0) &
1278 TX_DESC_DATA0_DTYPE_MASK_;
1279 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1280 goto clean_up_data_descriptor;
1281 else
1282 goto clear_active;
1283
1284 clean_up_data_descriptor:
1285 if (buffer_info->dma_ptr) {
1286 if (buffer_info->flags &
1287 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1288 dma_unmap_page(&tx->adapter->pdev->dev,
1289 buffer_info->dma_ptr,
1290 buffer_info->buffer_length,
1291 DMA_TO_DEVICE);
1292 } else {
1293 dma_unmap_single(&tx->adapter->pdev->dev,
1294 buffer_info->dma_ptr,
1295 buffer_info->buffer_length,
1296 DMA_TO_DEVICE);
1297 }
1298 buffer_info->dma_ptr = 0;
1299 buffer_info->buffer_length = 0;
1300 }
1301 if (!buffer_info->skb)
1302 goto clear_active;
1303
1304 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1305 dev_kfree_skb_any(buffer_info->skb);
1306 goto clear_skb;
1307 }
1308
1309 if (cleanup) {
1310 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1311 dev_kfree_skb_any(buffer_info->skb);
1312 } else {
1313 ignore_sync = (buffer_info->flags &
1314 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1315 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1316 buffer_info->skb, ignore_sync);
1317 }
1318
1319 clear_skb:
1320 buffer_info->skb = NULL;
1321
1322 clear_active:
1323 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1324
1325 done:
1326 memset(buffer_info, 0, sizeof(*buffer_info));
1327 memset(descriptor, 0, sizeof(*descriptor));
1328 }
1329
lan743x_tx_next_index(struct lan743x_tx * tx,int index)1330 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1331 {
1332 return ((++index) % tx->ring_size);
1333 }
1334
lan743x_tx_release_completed_descriptors(struct lan743x_tx * tx)1335 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1336 {
1337 while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1338 lan743x_tx_release_desc(tx, tx->last_head, false);
1339 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1340 }
1341 }
1342
lan743x_tx_release_all_descriptors(struct lan743x_tx * tx)1343 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1344 {
1345 u32 original_head = 0;
1346
1347 original_head = tx->last_head;
1348 do {
1349 lan743x_tx_release_desc(tx, tx->last_head, true);
1350 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1351 } while (tx->last_head != original_head);
1352 memset(tx->ring_cpu_ptr, 0,
1353 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1354 memset(tx->buffer_info, 0,
1355 sizeof(*tx->buffer_info) * (tx->ring_size));
1356 }
1357
lan743x_tx_get_desc_cnt(struct lan743x_tx * tx,struct sk_buff * skb)1358 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1359 struct sk_buff *skb)
1360 {
1361 int result = 1; /* 1 for the main skb buffer */
1362 int nr_frags = 0;
1363
1364 if (skb_is_gso(skb))
1365 result++; /* requires an extension descriptor */
1366 nr_frags = skb_shinfo(skb)->nr_frags;
1367 result += nr_frags; /* 1 for each fragment buffer */
1368 return result;
1369 }
1370
lan743x_tx_get_avail_desc(struct lan743x_tx * tx)1371 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1372 {
1373 int last_head = tx->last_head;
1374 int last_tail = tx->last_tail;
1375
1376 if (last_tail >= last_head)
1377 return tx->ring_size - last_tail + last_head - 1;
1378 else
1379 return last_head - last_tail - 1;
1380 }
1381
lan743x_tx_set_timestamping_mode(struct lan743x_tx * tx,bool enable_timestamping,bool enable_onestep_sync)1382 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1383 bool enable_timestamping,
1384 bool enable_onestep_sync)
1385 {
1386 if (enable_timestamping)
1387 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1388 else
1389 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1390 if (enable_onestep_sync)
1391 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1392 else
1393 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1394 }
1395
lan743x_tx_frame_start(struct lan743x_tx * tx,unsigned char * first_buffer,unsigned int first_buffer_length,unsigned int frame_length,bool time_stamp,bool check_sum)1396 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1397 unsigned char *first_buffer,
1398 unsigned int first_buffer_length,
1399 unsigned int frame_length,
1400 bool time_stamp,
1401 bool check_sum)
1402 {
1403 /* called only from within lan743x_tx_xmit_frame.
1404 * assuming tx->ring_lock has already been acquired.
1405 */
1406 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1407 struct lan743x_tx_buffer_info *buffer_info = NULL;
1408 struct lan743x_adapter *adapter = tx->adapter;
1409 struct device *dev = &adapter->pdev->dev;
1410 dma_addr_t dma_ptr;
1411
1412 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1413 tx->frame_first = tx->last_tail;
1414 tx->frame_tail = tx->frame_first;
1415
1416 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1417 buffer_info = &tx->buffer_info[tx->frame_tail];
1418 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1419 DMA_TO_DEVICE);
1420 if (dma_mapping_error(dev, dma_ptr))
1421 return -ENOMEM;
1422
1423 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1424 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1425 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1426 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1427
1428 buffer_info->skb = NULL;
1429 buffer_info->dma_ptr = dma_ptr;
1430 buffer_info->buffer_length = first_buffer_length;
1431 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1432
1433 tx->frame_data0 = (first_buffer_length &
1434 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1435 TX_DESC_DATA0_DTYPE_DATA_ |
1436 TX_DESC_DATA0_FS_ |
1437 TX_DESC_DATA0_FCS_;
1438 if (time_stamp)
1439 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1440
1441 if (check_sum)
1442 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1443 TX_DESC_DATA0_IPE_ |
1444 TX_DESC_DATA0_TPE_;
1445
1446 /* data0 will be programmed in one of other frame assembler functions */
1447 return 0;
1448 }
1449
lan743x_tx_frame_add_lso(struct lan743x_tx * tx,unsigned int frame_length,int nr_frags)1450 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1451 unsigned int frame_length,
1452 int nr_frags)
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
1460 /* wrap up previous descriptor */
1461 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1462 if (nr_frags <= 0) {
1463 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1464 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1465 }
1466 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1467 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1468
1469 /* move to next descriptor */
1470 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1471 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1472 buffer_info = &tx->buffer_info[tx->frame_tail];
1473
1474 /* add extension descriptor */
1475 tx_descriptor->data1 = 0;
1476 tx_descriptor->data2 = 0;
1477 tx_descriptor->data3 = 0;
1478
1479 buffer_info->skb = NULL;
1480 buffer_info->dma_ptr = 0;
1481 buffer_info->buffer_length = 0;
1482 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1483
1484 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1485 TX_DESC_DATA0_DTYPE_EXT_ |
1486 TX_DESC_DATA0_EXT_LSO_;
1487
1488 /* data0 will be programmed in one of other frame assembler functions */
1489 }
1490
lan743x_tx_frame_add_fragment(struct lan743x_tx * tx,const skb_frag_t * fragment,unsigned int frame_length)1491 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1492 const skb_frag_t *fragment,
1493 unsigned int frame_length)
1494 {
1495 /* called only from within lan743x_tx_xmit_frame
1496 * assuming tx->ring_lock has already been acquired
1497 */
1498 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1499 struct lan743x_tx_buffer_info *buffer_info = NULL;
1500 struct lan743x_adapter *adapter = tx->adapter;
1501 struct device *dev = &adapter->pdev->dev;
1502 unsigned int fragment_length = 0;
1503 dma_addr_t dma_ptr;
1504
1505 fragment_length = skb_frag_size(fragment);
1506 if (!fragment_length)
1507 return 0;
1508
1509 /* wrap up previous descriptor */
1510 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1511 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1512
1513 /* move to next descriptor */
1514 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1515 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1516 buffer_info = &tx->buffer_info[tx->frame_tail];
1517 dma_ptr = skb_frag_dma_map(dev, fragment,
1518 0, fragment_length,
1519 DMA_TO_DEVICE);
1520 if (dma_mapping_error(dev, dma_ptr)) {
1521 int desc_index;
1522
1523 /* cleanup all previously setup descriptors */
1524 desc_index = tx->frame_first;
1525 while (desc_index != tx->frame_tail) {
1526 lan743x_tx_release_desc(tx, desc_index, true);
1527 desc_index = lan743x_tx_next_index(tx, desc_index);
1528 }
1529 dma_wmb();
1530 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1531 tx->frame_first = 0;
1532 tx->frame_data0 = 0;
1533 tx->frame_tail = 0;
1534 return -ENOMEM;
1535 }
1536
1537 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1538 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1539 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1540 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1541
1542 buffer_info->skb = NULL;
1543 buffer_info->dma_ptr = dma_ptr;
1544 buffer_info->buffer_length = fragment_length;
1545 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1546 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1547
1548 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1549 TX_DESC_DATA0_DTYPE_DATA_ |
1550 TX_DESC_DATA0_FCS_;
1551
1552 /* data0 will be programmed in one of other frame assembler functions */
1553 return 0;
1554 }
1555
lan743x_tx_frame_end(struct lan743x_tx * tx,struct sk_buff * skb,bool time_stamp,bool ignore_sync)1556 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1557 struct sk_buff *skb,
1558 bool time_stamp,
1559 bool ignore_sync)
1560 {
1561 /* called only from within lan743x_tx_xmit_frame
1562 * assuming tx->ring_lock has already been acquired
1563 */
1564 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1565 struct lan743x_tx_buffer_info *buffer_info = NULL;
1566 struct lan743x_adapter *adapter = tx->adapter;
1567 u32 tx_tail_flags = 0;
1568
1569 /* wrap up previous descriptor */
1570 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1571 TX_DESC_DATA0_DTYPE_DATA_) {
1572 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1573 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1574 }
1575
1576 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1577 buffer_info = &tx->buffer_info[tx->frame_tail];
1578 buffer_info->skb = skb;
1579 if (time_stamp)
1580 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1581 if (ignore_sync)
1582 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1583
1584 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1585 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1586 tx->last_tail = tx->frame_tail;
1587
1588 dma_wmb();
1589
1590 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1591 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1592 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1593 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1594 TX_TAIL_SET_TOP_INT_EN_;
1595
1596 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1597 tx_tail_flags | tx->frame_tail);
1598 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1599 }
1600
lan743x_tx_xmit_frame(struct lan743x_tx * tx,struct sk_buff * skb)1601 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1602 struct sk_buff *skb)
1603 {
1604 int required_number_of_descriptors = 0;
1605 unsigned int start_frame_length = 0;
1606 unsigned int frame_length = 0;
1607 unsigned int head_length = 0;
1608 unsigned long irq_flags = 0;
1609 bool do_timestamp = false;
1610 bool ignore_sync = false;
1611 int nr_frags = 0;
1612 bool gso = false;
1613 int j;
1614
1615 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1616
1617 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1618 if (required_number_of_descriptors >
1619 lan743x_tx_get_avail_desc(tx)) {
1620 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1621 dev_kfree_skb_irq(skb);
1622 } else {
1623 /* save to overflow buffer */
1624 tx->overflow_skb = skb;
1625 netif_stop_queue(tx->adapter->netdev);
1626 }
1627 goto unlock;
1628 }
1629
1630 /* space available, transmit skb */
1631 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1632 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1633 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1634 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1635 do_timestamp = true;
1636 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1637 ignore_sync = true;
1638 }
1639 head_length = skb_headlen(skb);
1640 frame_length = skb_pagelen(skb);
1641 nr_frags = skb_shinfo(skb)->nr_frags;
1642 start_frame_length = frame_length;
1643 gso = skb_is_gso(skb);
1644 if (gso) {
1645 start_frame_length = max(skb_shinfo(skb)->gso_size,
1646 (unsigned short)8);
1647 }
1648
1649 if (lan743x_tx_frame_start(tx,
1650 skb->data, head_length,
1651 start_frame_length,
1652 do_timestamp,
1653 skb->ip_summed == CHECKSUM_PARTIAL)) {
1654 dev_kfree_skb_irq(skb);
1655 goto unlock;
1656 }
1657
1658 if (gso)
1659 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1660
1661 if (nr_frags <= 0)
1662 goto finish;
1663
1664 for (j = 0; j < nr_frags; j++) {
1665 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1666
1667 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1668 /* upon error no need to call
1669 * lan743x_tx_frame_end
1670 * frame assembler clean up was performed inside
1671 * lan743x_tx_frame_add_fragment
1672 */
1673 dev_kfree_skb_irq(skb);
1674 goto unlock;
1675 }
1676 }
1677
1678 finish:
1679 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1680
1681 unlock:
1682 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1683 return NETDEV_TX_OK;
1684 }
1685
lan743x_tx_napi_poll(struct napi_struct * napi,int weight)1686 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1687 {
1688 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1689 struct lan743x_adapter *adapter = tx->adapter;
1690 bool start_transmitter = false;
1691 unsigned long irq_flags = 0;
1692 u32 ioc_bit = 0;
1693
1694 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1695 lan743x_csr_read(adapter, DMAC_INT_STS);
1696 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1697 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1698 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1699
1700 /* clean up tx ring */
1701 lan743x_tx_release_completed_descriptors(tx);
1702 if (netif_queue_stopped(adapter->netdev)) {
1703 if (tx->overflow_skb) {
1704 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1705 lan743x_tx_get_avail_desc(tx))
1706 start_transmitter = true;
1707 } else {
1708 netif_wake_queue(adapter->netdev);
1709 }
1710 }
1711 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1712
1713 if (start_transmitter) {
1714 /* space is now available, transmit overflow skb */
1715 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1716 tx->overflow_skb = NULL;
1717 netif_wake_queue(adapter->netdev);
1718 }
1719
1720 if (!napi_complete(napi))
1721 goto done;
1722
1723 /* enable isr */
1724 lan743x_csr_write(adapter, INT_EN_SET,
1725 INT_BIT_DMA_TX_(tx->channel_number));
1726 lan743x_csr_read(adapter, INT_STS);
1727
1728 done:
1729 return 0;
1730 }
1731
lan743x_tx_ring_cleanup(struct lan743x_tx * tx)1732 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1733 {
1734 if (tx->head_cpu_ptr) {
1735 dma_free_coherent(&tx->adapter->pdev->dev,
1736 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1737 tx->head_dma_ptr);
1738 tx->head_cpu_ptr = NULL;
1739 tx->head_dma_ptr = 0;
1740 }
1741 kfree(tx->buffer_info);
1742 tx->buffer_info = NULL;
1743
1744 if (tx->ring_cpu_ptr) {
1745 dma_free_coherent(&tx->adapter->pdev->dev,
1746 tx->ring_allocation_size, tx->ring_cpu_ptr,
1747 tx->ring_dma_ptr);
1748 tx->ring_allocation_size = 0;
1749 tx->ring_cpu_ptr = NULL;
1750 tx->ring_dma_ptr = 0;
1751 }
1752 tx->ring_size = 0;
1753 }
1754
lan743x_tx_ring_init(struct lan743x_tx * tx)1755 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1756 {
1757 size_t ring_allocation_size = 0;
1758 void *cpu_ptr = NULL;
1759 dma_addr_t dma_ptr;
1760 int ret = -ENOMEM;
1761
1762 tx->ring_size = LAN743X_TX_RING_SIZE;
1763 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1764 ret = -EINVAL;
1765 goto cleanup;
1766 }
1767 if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
1768 DMA_BIT_MASK(64))) {
1769 if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
1770 DMA_BIT_MASK(32))) {
1771 dev_warn(&tx->adapter->pdev->dev,
1772 "lan743x_: No suitable DMA available\n");
1773 ret = -ENOMEM;
1774 goto cleanup;
1775 }
1776 }
1777 ring_allocation_size = ALIGN(tx->ring_size *
1778 sizeof(struct lan743x_tx_descriptor),
1779 PAGE_SIZE);
1780 dma_ptr = 0;
1781 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1782 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1783 if (!cpu_ptr) {
1784 ret = -ENOMEM;
1785 goto cleanup;
1786 }
1787
1788 tx->ring_allocation_size = ring_allocation_size;
1789 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1790 tx->ring_dma_ptr = dma_ptr;
1791
1792 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1793 if (!cpu_ptr) {
1794 ret = -ENOMEM;
1795 goto cleanup;
1796 }
1797 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1798 dma_ptr = 0;
1799 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1800 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1801 GFP_KERNEL);
1802 if (!cpu_ptr) {
1803 ret = -ENOMEM;
1804 goto cleanup;
1805 }
1806
1807 tx->head_cpu_ptr = cpu_ptr;
1808 tx->head_dma_ptr = dma_ptr;
1809 if (tx->head_dma_ptr & 0x3) {
1810 ret = -ENOMEM;
1811 goto cleanup;
1812 }
1813
1814 return 0;
1815
1816 cleanup:
1817 lan743x_tx_ring_cleanup(tx);
1818 return ret;
1819 }
1820
lan743x_tx_close(struct lan743x_tx * tx)1821 static void lan743x_tx_close(struct lan743x_tx *tx)
1822 {
1823 struct lan743x_adapter *adapter = tx->adapter;
1824
1825 lan743x_csr_write(adapter,
1826 DMAC_CMD,
1827 DMAC_CMD_STOP_T_(tx->channel_number));
1828 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1829
1830 lan743x_csr_write(adapter,
1831 DMAC_INT_EN_CLR,
1832 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1833 lan743x_csr_write(adapter, INT_EN_CLR,
1834 INT_BIT_DMA_TX_(tx->channel_number));
1835 napi_disable(&tx->napi);
1836 netif_napi_del(&tx->napi);
1837
1838 lan743x_csr_write(adapter, FCT_TX_CTL,
1839 FCT_TX_CTL_DIS_(tx->channel_number));
1840 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1841 FCT_TX_CTL_EN_(tx->channel_number),
1842 0, 1000, 20000, 100);
1843
1844 lan743x_tx_release_all_descriptors(tx);
1845
1846 if (tx->overflow_skb) {
1847 dev_kfree_skb(tx->overflow_skb);
1848 tx->overflow_skb = NULL;
1849 }
1850
1851 lan743x_tx_ring_cleanup(tx);
1852 }
1853
lan743x_tx_open(struct lan743x_tx * tx)1854 static int lan743x_tx_open(struct lan743x_tx *tx)
1855 {
1856 struct lan743x_adapter *adapter = NULL;
1857 u32 data = 0;
1858 int ret;
1859
1860 adapter = tx->adapter;
1861 ret = lan743x_tx_ring_init(tx);
1862 if (ret)
1863 return ret;
1864
1865 /* initialize fifo */
1866 lan743x_csr_write(adapter, FCT_TX_CTL,
1867 FCT_TX_CTL_RESET_(tx->channel_number));
1868 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1869 FCT_TX_CTL_RESET_(tx->channel_number),
1870 0, 1000, 20000, 100);
1871
1872 /* enable fifo */
1873 lan743x_csr_write(adapter, FCT_TX_CTL,
1874 FCT_TX_CTL_EN_(tx->channel_number));
1875
1876 /* reset tx channel */
1877 lan743x_csr_write(adapter, DMAC_CMD,
1878 DMAC_CMD_TX_SWR_(tx->channel_number));
1879 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1880 DMAC_CMD_TX_SWR_(tx->channel_number),
1881 0, 1000, 20000, 100);
1882
1883 /* Write TX_BASE_ADDR */
1884 lan743x_csr_write(adapter,
1885 TX_BASE_ADDRH(tx->channel_number),
1886 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1887 lan743x_csr_write(adapter,
1888 TX_BASE_ADDRL(tx->channel_number),
1889 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1890
1891 /* Write TX_CFG_B */
1892 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1893 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1894 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1895 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1896 data |= TX_CFG_B_TDMABL_512_;
1897 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1898
1899 /* Write TX_CFG_A */
1900 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1901 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1902 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1903 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1904 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1905 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1906 }
1907 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1908
1909 /* Write TX_HEAD_WRITEBACK_ADDR */
1910 lan743x_csr_write(adapter,
1911 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1912 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1913 lan743x_csr_write(adapter,
1914 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1915 DMA_ADDR_LOW32(tx->head_dma_ptr));
1916
1917 /* set last head */
1918 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1919
1920 /* write TX_TAIL */
1921 tx->last_tail = 0;
1922 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1923 (u32)(tx->last_tail));
1924 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1925 INT_BIT_DMA_TX_
1926 (tx->channel_number));
1927 netif_tx_napi_add(adapter->netdev,
1928 &tx->napi, lan743x_tx_napi_poll,
1929 tx->ring_size - 1);
1930 napi_enable(&tx->napi);
1931
1932 data = 0;
1933 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1934 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1935 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1936 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1937 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1938 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1939 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1940 data |= TX_CFG_C_TX_INT_EN_R2C_;
1941 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1942
1943 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1944 lan743x_csr_write(adapter, INT_EN_SET,
1945 INT_BIT_DMA_TX_(tx->channel_number));
1946 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1947 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1948
1949 /* start dmac channel */
1950 lan743x_csr_write(adapter, DMAC_CMD,
1951 DMAC_CMD_START_T_(tx->channel_number));
1952 return 0;
1953 }
1954
lan743x_rx_next_index(struct lan743x_rx * rx,int index)1955 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1956 {
1957 return ((++index) % rx->ring_size);
1958 }
1959
lan743x_rx_allocate_skb(struct lan743x_rx * rx,gfp_t gfp)1960 static struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx, gfp_t gfp)
1961 {
1962 int length = 0;
1963
1964 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1965 return __netdev_alloc_skb(rx->adapter->netdev,
1966 length, gfp);
1967 }
1968
lan743x_rx_update_tail(struct lan743x_rx * rx,int index)1969 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
1970 {
1971 /* update the tail once per 8 descriptors */
1972 if ((index & 7) == 7)
1973 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
1974 index);
1975 }
1976
lan743x_rx_init_ring_element(struct lan743x_rx * rx,int index,struct sk_buff * skb)1977 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
1978 struct sk_buff *skb)
1979 {
1980 struct lan743x_rx_buffer_info *buffer_info;
1981 struct lan743x_rx_descriptor *descriptor;
1982 int length = 0;
1983
1984 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1985 descriptor = &rx->ring_cpu_ptr[index];
1986 buffer_info = &rx->buffer_info[index];
1987 buffer_info->skb = skb;
1988 if (!(buffer_info->skb))
1989 return -ENOMEM;
1990 buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1991 buffer_info->skb->data,
1992 length,
1993 DMA_FROM_DEVICE);
1994 if (dma_mapping_error(&rx->adapter->pdev->dev,
1995 buffer_info->dma_ptr)) {
1996 buffer_info->dma_ptr = 0;
1997 return -ENOMEM;
1998 }
1999
2000 buffer_info->buffer_length = length;
2001 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2002 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2003 descriptor->data3 = 0;
2004 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2005 (length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2006 skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
2007 lan743x_rx_update_tail(rx, index);
2008
2009 return 0;
2010 }
2011
lan743x_rx_reuse_ring_element(struct lan743x_rx * rx,int index)2012 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
2013 {
2014 struct lan743x_rx_buffer_info *buffer_info;
2015 struct lan743x_rx_descriptor *descriptor;
2016
2017 descriptor = &rx->ring_cpu_ptr[index];
2018 buffer_info = &rx->buffer_info[index];
2019
2020 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2021 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2022 descriptor->data3 = 0;
2023 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2024 ((buffer_info->buffer_length) &
2025 RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2026 lan743x_rx_update_tail(rx, index);
2027 }
2028
lan743x_rx_release_ring_element(struct lan743x_rx * rx,int index)2029 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2030 {
2031 struct lan743x_rx_buffer_info *buffer_info;
2032 struct lan743x_rx_descriptor *descriptor;
2033
2034 descriptor = &rx->ring_cpu_ptr[index];
2035 buffer_info = &rx->buffer_info[index];
2036
2037 memset(descriptor, 0, sizeof(*descriptor));
2038
2039 if (buffer_info->dma_ptr) {
2040 dma_unmap_single(&rx->adapter->pdev->dev,
2041 buffer_info->dma_ptr,
2042 buffer_info->buffer_length,
2043 DMA_FROM_DEVICE);
2044 buffer_info->dma_ptr = 0;
2045 }
2046
2047 if (buffer_info->skb) {
2048 dev_kfree_skb(buffer_info->skb);
2049 buffer_info->skb = NULL;
2050 }
2051
2052 memset(buffer_info, 0, sizeof(*buffer_info));
2053 }
2054
lan743x_rx_process_packet(struct lan743x_rx * rx)2055 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
2056 {
2057 struct skb_shared_hwtstamps *hwtstamps = NULL;
2058 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2059 int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2060 struct lan743x_rx_buffer_info *buffer_info;
2061 struct lan743x_rx_descriptor *descriptor;
2062 int extension_index = -1;
2063 int first_index = -1;
2064 int last_index = -1;
2065
2066 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2067 goto done;
2068
2069 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2070 goto done;
2071
2072 if (rx->last_head != current_head_index) {
2073 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2074 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2075 goto done;
2076
2077 if (!(le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_))
2078 goto done;
2079
2080 first_index = rx->last_head;
2081 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_) {
2082 last_index = rx->last_head;
2083 } else {
2084 int index;
2085
2086 index = lan743x_rx_next_index(rx, first_index);
2087 while (index != current_head_index) {
2088 descriptor = &rx->ring_cpu_ptr[index];
2089 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2090 goto done;
2091
2092 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_) {
2093 last_index = index;
2094 break;
2095 }
2096 index = lan743x_rx_next_index(rx, index);
2097 }
2098 }
2099 if (last_index >= 0) {
2100 descriptor = &rx->ring_cpu_ptr[last_index];
2101 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2102 /* extension is expected to follow */
2103 int index = lan743x_rx_next_index(rx,
2104 last_index);
2105 if (index != current_head_index) {
2106 descriptor = &rx->ring_cpu_ptr[index];
2107 if (le32_to_cpu(descriptor->data0) &
2108 RX_DESC_DATA0_OWN_) {
2109 goto done;
2110 }
2111 if (le32_to_cpu(descriptor->data0) &
2112 RX_DESC_DATA0_EXT_) {
2113 extension_index = index;
2114 } else {
2115 goto done;
2116 }
2117 } else {
2118 /* extension is not yet available */
2119 /* prevent processing of this packet */
2120 first_index = -1;
2121 last_index = -1;
2122 }
2123 }
2124 }
2125 }
2126 if (first_index >= 0 && last_index >= 0) {
2127 int real_last_index = last_index;
2128 struct sk_buff *skb = NULL;
2129 u32 ts_sec = 0;
2130 u32 ts_nsec = 0;
2131
2132 /* packet is available */
2133 if (first_index == last_index) {
2134 /* single buffer packet */
2135 struct sk_buff *new_skb = NULL;
2136 int packet_length;
2137
2138 new_skb = lan743x_rx_allocate_skb(rx,
2139 GFP_ATOMIC | GFP_DMA);
2140 if (!new_skb) {
2141 /* failed to allocate next skb.
2142 * Memory is very low.
2143 * Drop this packet and reuse buffer.
2144 */
2145 lan743x_rx_reuse_ring_element(rx, first_index);
2146 goto process_extension;
2147 }
2148
2149 buffer_info = &rx->buffer_info[first_index];
2150 skb = buffer_info->skb;
2151 descriptor = &rx->ring_cpu_ptr[first_index];
2152
2153 /* unmap from dma */
2154 if (buffer_info->dma_ptr) {
2155 dma_unmap_single(&rx->adapter->pdev->dev,
2156 buffer_info->dma_ptr,
2157 buffer_info->buffer_length,
2158 DMA_FROM_DEVICE);
2159 buffer_info->dma_ptr = 0;
2160 buffer_info->buffer_length = 0;
2161 }
2162 buffer_info->skb = NULL;
2163 packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2164 (le32_to_cpu(descriptor->data0));
2165 skb_put(skb, packet_length - 4);
2166 skb->protocol = eth_type_trans(skb,
2167 rx->adapter->netdev);
2168 lan743x_rx_init_ring_element(rx, first_index, new_skb);
2169 } else {
2170 int index = first_index;
2171
2172 /* multi buffer packet not supported */
2173 /* this should not happen since
2174 * buffers are allocated to be at least jumbo size
2175 */
2176
2177 /* clean up buffers */
2178 if (first_index <= last_index) {
2179 while ((index >= first_index) &&
2180 (index <= last_index)) {
2181 lan743x_rx_reuse_ring_element(rx,
2182 index);
2183 index = lan743x_rx_next_index(rx,
2184 index);
2185 }
2186 } else {
2187 while ((index >= first_index) ||
2188 (index <= last_index)) {
2189 lan743x_rx_reuse_ring_element(rx,
2190 index);
2191 index = lan743x_rx_next_index(rx,
2192 index);
2193 }
2194 }
2195 }
2196
2197 process_extension:
2198 if (extension_index >= 0) {
2199 descriptor = &rx->ring_cpu_ptr[extension_index];
2200 buffer_info = &rx->buffer_info[extension_index];
2201
2202 ts_sec = le32_to_cpu(descriptor->data1);
2203 ts_nsec = (le32_to_cpu(descriptor->data2) &
2204 RX_DESC_DATA2_TS_NS_MASK_);
2205 lan743x_rx_reuse_ring_element(rx, extension_index);
2206 real_last_index = extension_index;
2207 }
2208
2209 if (!skb) {
2210 result = RX_PROCESS_RESULT_PACKET_DROPPED;
2211 goto move_forward;
2212 }
2213
2214 if (extension_index < 0)
2215 goto pass_packet_to_os;
2216 hwtstamps = skb_hwtstamps(skb);
2217 if (hwtstamps)
2218 hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2219
2220 pass_packet_to_os:
2221 /* pass packet to OS */
2222 napi_gro_receive(&rx->napi, skb);
2223 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2224
2225 move_forward:
2226 /* push tail and head forward */
2227 rx->last_tail = real_last_index;
2228 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2229 }
2230 done:
2231 return result;
2232 }
2233
lan743x_rx_napi_poll(struct napi_struct * napi,int weight)2234 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2235 {
2236 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2237 struct lan743x_adapter *adapter = rx->adapter;
2238 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2239 u32 rx_tail_flags = 0;
2240 int count;
2241
2242 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2243 /* clear int status bit before reading packet */
2244 lan743x_csr_write(adapter, DMAC_INT_STS,
2245 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2246 }
2247 for (count = 0; count < weight; count++) {
2248 result = lan743x_rx_process_packet(rx);
2249 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2250 break;
2251 }
2252 rx->frame_count += count;
2253 if (count == weight || result == RX_PROCESS_RESULT_PACKET_RECEIVED)
2254 return weight;
2255
2256 if (!napi_complete_done(napi, count))
2257 return count;
2258
2259 /* re-arm interrupts, must write to rx tail on some chip variants */
2260 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2261 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2262 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2263 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2264 } else {
2265 lan743x_csr_write(adapter, INT_EN_SET,
2266 INT_BIT_DMA_RX_(rx->channel_number));
2267 }
2268
2269 if (rx_tail_flags)
2270 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2271 rx_tail_flags | rx->last_tail);
2272
2273 return count;
2274 }
2275
lan743x_rx_ring_cleanup(struct lan743x_rx * rx)2276 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2277 {
2278 if (rx->buffer_info && rx->ring_cpu_ptr) {
2279 int index;
2280
2281 for (index = 0; index < rx->ring_size; index++)
2282 lan743x_rx_release_ring_element(rx, index);
2283 }
2284
2285 if (rx->head_cpu_ptr) {
2286 dma_free_coherent(&rx->adapter->pdev->dev,
2287 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2288 rx->head_dma_ptr);
2289 rx->head_cpu_ptr = NULL;
2290 rx->head_dma_ptr = 0;
2291 }
2292
2293 kfree(rx->buffer_info);
2294 rx->buffer_info = NULL;
2295
2296 if (rx->ring_cpu_ptr) {
2297 dma_free_coherent(&rx->adapter->pdev->dev,
2298 rx->ring_allocation_size, rx->ring_cpu_ptr,
2299 rx->ring_dma_ptr);
2300 rx->ring_allocation_size = 0;
2301 rx->ring_cpu_ptr = NULL;
2302 rx->ring_dma_ptr = 0;
2303 }
2304
2305 rx->ring_size = 0;
2306 rx->last_head = 0;
2307 }
2308
lan743x_rx_ring_init(struct lan743x_rx * rx)2309 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2310 {
2311 size_t ring_allocation_size = 0;
2312 dma_addr_t dma_ptr = 0;
2313 void *cpu_ptr = NULL;
2314 int ret = -ENOMEM;
2315 int index = 0;
2316
2317 rx->ring_size = LAN743X_RX_RING_SIZE;
2318 if (rx->ring_size <= 1) {
2319 ret = -EINVAL;
2320 goto cleanup;
2321 }
2322 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2323 ret = -EINVAL;
2324 goto cleanup;
2325 }
2326 if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2327 DMA_BIT_MASK(64))) {
2328 if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2329 DMA_BIT_MASK(32))) {
2330 dev_warn(&rx->adapter->pdev->dev,
2331 "lan743x_: No suitable DMA available\n");
2332 ret = -ENOMEM;
2333 goto cleanup;
2334 }
2335 }
2336 ring_allocation_size = ALIGN(rx->ring_size *
2337 sizeof(struct lan743x_rx_descriptor),
2338 PAGE_SIZE);
2339 dma_ptr = 0;
2340 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2341 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2342 if (!cpu_ptr) {
2343 ret = -ENOMEM;
2344 goto cleanup;
2345 }
2346 rx->ring_allocation_size = ring_allocation_size;
2347 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2348 rx->ring_dma_ptr = dma_ptr;
2349
2350 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2351 GFP_KERNEL);
2352 if (!cpu_ptr) {
2353 ret = -ENOMEM;
2354 goto cleanup;
2355 }
2356 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2357 dma_ptr = 0;
2358 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2359 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2360 GFP_KERNEL);
2361 if (!cpu_ptr) {
2362 ret = -ENOMEM;
2363 goto cleanup;
2364 }
2365
2366 rx->head_cpu_ptr = cpu_ptr;
2367 rx->head_dma_ptr = dma_ptr;
2368 if (rx->head_dma_ptr & 0x3) {
2369 ret = -ENOMEM;
2370 goto cleanup;
2371 }
2372
2373 rx->last_head = 0;
2374 for (index = 0; index < rx->ring_size; index++) {
2375 struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx,
2376 GFP_KERNEL);
2377
2378 ret = lan743x_rx_init_ring_element(rx, index, new_skb);
2379 if (ret)
2380 goto cleanup;
2381 }
2382 return 0;
2383
2384 cleanup:
2385 lan743x_rx_ring_cleanup(rx);
2386 return ret;
2387 }
2388
lan743x_rx_close(struct lan743x_rx * rx)2389 static void lan743x_rx_close(struct lan743x_rx *rx)
2390 {
2391 struct lan743x_adapter *adapter = rx->adapter;
2392
2393 lan743x_csr_write(adapter, FCT_RX_CTL,
2394 FCT_RX_CTL_DIS_(rx->channel_number));
2395 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2396 FCT_RX_CTL_EN_(rx->channel_number),
2397 0, 1000, 20000, 100);
2398
2399 lan743x_csr_write(adapter, DMAC_CMD,
2400 DMAC_CMD_STOP_R_(rx->channel_number));
2401 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2402
2403 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2404 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2405 lan743x_csr_write(adapter, INT_EN_CLR,
2406 INT_BIT_DMA_RX_(rx->channel_number));
2407 napi_disable(&rx->napi);
2408
2409 netif_napi_del(&rx->napi);
2410
2411 lan743x_rx_ring_cleanup(rx);
2412 }
2413
lan743x_rx_open(struct lan743x_rx * rx)2414 static int lan743x_rx_open(struct lan743x_rx *rx)
2415 {
2416 struct lan743x_adapter *adapter = rx->adapter;
2417 u32 data = 0;
2418 int ret;
2419
2420 rx->frame_count = 0;
2421 ret = lan743x_rx_ring_init(rx);
2422 if (ret)
2423 goto return_error;
2424
2425 netif_napi_add(adapter->netdev,
2426 &rx->napi, lan743x_rx_napi_poll,
2427 NAPI_POLL_WEIGHT);
2428
2429 lan743x_csr_write(adapter, DMAC_CMD,
2430 DMAC_CMD_RX_SWR_(rx->channel_number));
2431 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2432 DMAC_CMD_RX_SWR_(rx->channel_number),
2433 0, 1000, 20000, 100);
2434
2435 /* set ring base address */
2436 lan743x_csr_write(adapter,
2437 RX_BASE_ADDRH(rx->channel_number),
2438 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2439 lan743x_csr_write(adapter,
2440 RX_BASE_ADDRL(rx->channel_number),
2441 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2442
2443 /* set rx write back address */
2444 lan743x_csr_write(adapter,
2445 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2446 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2447 lan743x_csr_write(adapter,
2448 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2449 DMA_ADDR_LOW32(rx->head_dma_ptr));
2450 data = RX_CFG_A_RX_HP_WB_EN_;
2451 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2452 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2453 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2454 RX_CFG_A_RX_PF_THRES_SET_(16) |
2455 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2456 }
2457
2458 /* set RX_CFG_A */
2459 lan743x_csr_write(adapter,
2460 RX_CFG_A(rx->channel_number), data);
2461
2462 /* set RX_CFG_B */
2463 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2464 data &= ~RX_CFG_B_RX_PAD_MASK_;
2465 if (!RX_HEAD_PADDING)
2466 data |= RX_CFG_B_RX_PAD_0_;
2467 else
2468 data |= RX_CFG_B_RX_PAD_2_;
2469 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2470 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2471 data |= RX_CFG_B_TS_ALL_RX_;
2472 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2473 data |= RX_CFG_B_RDMABL_512_;
2474
2475 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2476 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2477 INT_BIT_DMA_RX_
2478 (rx->channel_number));
2479
2480 /* set RX_CFG_C */
2481 data = 0;
2482 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2483 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2484 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2485 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2486 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2487 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2488 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2489 data |= RX_CFG_C_RX_INT_EN_R2C_;
2490 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2491
2492 rx->last_tail = ((u32)(rx->ring_size - 1));
2493 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2494 rx->last_tail);
2495 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2496 if (rx->last_head) {
2497 ret = -EIO;
2498 goto napi_delete;
2499 }
2500
2501 napi_enable(&rx->napi);
2502
2503 lan743x_csr_write(adapter, INT_EN_SET,
2504 INT_BIT_DMA_RX_(rx->channel_number));
2505 lan743x_csr_write(adapter, DMAC_INT_STS,
2506 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2507 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2508 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2509 lan743x_csr_write(adapter, DMAC_CMD,
2510 DMAC_CMD_START_R_(rx->channel_number));
2511
2512 /* initialize fifo */
2513 lan743x_csr_write(adapter, FCT_RX_CTL,
2514 FCT_RX_CTL_RESET_(rx->channel_number));
2515 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2516 FCT_RX_CTL_RESET_(rx->channel_number),
2517 0, 1000, 20000, 100);
2518 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2519 FCT_FLOW_CTL_REQ_EN_ |
2520 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2521 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2522
2523 /* enable fifo */
2524 lan743x_csr_write(adapter, FCT_RX_CTL,
2525 FCT_RX_CTL_EN_(rx->channel_number));
2526 return 0;
2527
2528 napi_delete:
2529 netif_napi_del(&rx->napi);
2530 lan743x_rx_ring_cleanup(rx);
2531
2532 return_error:
2533 return ret;
2534 }
2535
lan743x_netdev_close(struct net_device * netdev)2536 static int lan743x_netdev_close(struct net_device *netdev)
2537 {
2538 struct lan743x_adapter *adapter = netdev_priv(netdev);
2539 int index;
2540
2541 lan743x_tx_close(&adapter->tx[0]);
2542
2543 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2544 lan743x_rx_close(&adapter->rx[index]);
2545
2546 lan743x_ptp_close(adapter);
2547
2548 lan743x_phy_close(adapter);
2549
2550 lan743x_mac_close(adapter);
2551
2552 lan743x_intr_close(adapter);
2553
2554 return 0;
2555 }
2556
lan743x_netdev_open(struct net_device * netdev)2557 static int lan743x_netdev_open(struct net_device *netdev)
2558 {
2559 struct lan743x_adapter *adapter = netdev_priv(netdev);
2560 int index;
2561 int ret;
2562
2563 ret = lan743x_intr_open(adapter);
2564 if (ret)
2565 goto return_error;
2566
2567 ret = lan743x_mac_open(adapter);
2568 if (ret)
2569 goto close_intr;
2570
2571 ret = lan743x_phy_open(adapter);
2572 if (ret)
2573 goto close_mac;
2574
2575 ret = lan743x_ptp_open(adapter);
2576 if (ret)
2577 goto close_phy;
2578
2579 lan743x_rfe_open(adapter);
2580
2581 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2582 ret = lan743x_rx_open(&adapter->rx[index]);
2583 if (ret)
2584 goto close_rx;
2585 }
2586
2587 ret = lan743x_tx_open(&adapter->tx[0]);
2588 if (ret)
2589 goto close_rx;
2590
2591 return 0;
2592
2593 close_rx:
2594 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2595 if (adapter->rx[index].ring_cpu_ptr)
2596 lan743x_rx_close(&adapter->rx[index]);
2597 }
2598 lan743x_ptp_close(adapter);
2599
2600 close_phy:
2601 lan743x_phy_close(adapter);
2602
2603 close_mac:
2604 lan743x_mac_close(adapter);
2605
2606 close_intr:
2607 lan743x_intr_close(adapter);
2608
2609 return_error:
2610 netif_warn(adapter, ifup, adapter->netdev,
2611 "Error opening LAN743x\n");
2612 return ret;
2613 }
2614
lan743x_netdev_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2615 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2616 struct net_device *netdev)
2617 {
2618 struct lan743x_adapter *adapter = netdev_priv(netdev);
2619
2620 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2621 }
2622
lan743x_netdev_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)2623 static int lan743x_netdev_ioctl(struct net_device *netdev,
2624 struct ifreq *ifr, int cmd)
2625 {
2626 if (!netif_running(netdev))
2627 return -EINVAL;
2628 if (cmd == SIOCSHWTSTAMP)
2629 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2630 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2631 }
2632
lan743x_netdev_set_multicast(struct net_device * netdev)2633 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2634 {
2635 struct lan743x_adapter *adapter = netdev_priv(netdev);
2636
2637 lan743x_rfe_set_multicast(adapter);
2638 }
2639
lan743x_netdev_change_mtu(struct net_device * netdev,int new_mtu)2640 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2641 {
2642 struct lan743x_adapter *adapter = netdev_priv(netdev);
2643 int ret = 0;
2644
2645 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2646 if (!ret)
2647 netdev->mtu = new_mtu;
2648 return ret;
2649 }
2650
lan743x_netdev_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * stats)2651 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2652 struct rtnl_link_stats64 *stats)
2653 {
2654 struct lan743x_adapter *adapter = netdev_priv(netdev);
2655
2656 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2657 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2658 stats->rx_bytes = lan743x_csr_read(adapter,
2659 STAT_RX_UNICAST_BYTE_COUNT) +
2660 lan743x_csr_read(adapter,
2661 STAT_RX_BROADCAST_BYTE_COUNT) +
2662 lan743x_csr_read(adapter,
2663 STAT_RX_MULTICAST_BYTE_COUNT);
2664 stats->tx_bytes = lan743x_csr_read(adapter,
2665 STAT_TX_UNICAST_BYTE_COUNT) +
2666 lan743x_csr_read(adapter,
2667 STAT_TX_BROADCAST_BYTE_COUNT) +
2668 lan743x_csr_read(adapter,
2669 STAT_TX_MULTICAST_BYTE_COUNT);
2670 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2671 lan743x_csr_read(adapter,
2672 STAT_RX_ALIGNMENT_ERRORS) +
2673 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2674 lan743x_csr_read(adapter,
2675 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2676 lan743x_csr_read(adapter,
2677 STAT_RX_OVERSIZE_FRAME_ERRORS);
2678 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2679 lan743x_csr_read(adapter,
2680 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2681 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2682 stats->rx_dropped = lan743x_csr_read(adapter,
2683 STAT_RX_DROPPED_FRAMES);
2684 stats->tx_dropped = lan743x_csr_read(adapter,
2685 STAT_TX_EXCESSIVE_COLLISION);
2686 stats->multicast = lan743x_csr_read(adapter,
2687 STAT_RX_MULTICAST_FRAMES) +
2688 lan743x_csr_read(adapter,
2689 STAT_TX_MULTICAST_FRAMES);
2690 stats->collisions = lan743x_csr_read(adapter,
2691 STAT_TX_SINGLE_COLLISIONS) +
2692 lan743x_csr_read(adapter,
2693 STAT_TX_MULTIPLE_COLLISIONS) +
2694 lan743x_csr_read(adapter,
2695 STAT_TX_LATE_COLLISIONS);
2696 }
2697
lan743x_netdev_set_mac_address(struct net_device * netdev,void * addr)2698 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2699 void *addr)
2700 {
2701 struct lan743x_adapter *adapter = netdev_priv(netdev);
2702 struct sockaddr *sock_addr = addr;
2703 int ret;
2704
2705 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2706 if (ret)
2707 return ret;
2708 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2709 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2710 lan743x_rfe_update_mac_address(adapter);
2711 return 0;
2712 }
2713
2714 static const struct net_device_ops lan743x_netdev_ops = {
2715 .ndo_open = lan743x_netdev_open,
2716 .ndo_stop = lan743x_netdev_close,
2717 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2718 .ndo_do_ioctl = lan743x_netdev_ioctl,
2719 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2720 .ndo_change_mtu = lan743x_netdev_change_mtu,
2721 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2722 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2723 };
2724
lan743x_hardware_cleanup(struct lan743x_adapter * adapter)2725 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2726 {
2727 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2728 }
2729
lan743x_mdiobus_cleanup(struct lan743x_adapter * adapter)2730 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2731 {
2732 mdiobus_unregister(adapter->mdiobus);
2733 }
2734
lan743x_full_cleanup(struct lan743x_adapter * adapter)2735 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2736 {
2737 unregister_netdev(adapter->netdev);
2738
2739 lan743x_mdiobus_cleanup(adapter);
2740 lan743x_hardware_cleanup(adapter);
2741 lan743x_pci_cleanup(adapter);
2742 }
2743
lan743x_hardware_init(struct lan743x_adapter * adapter,struct pci_dev * pdev)2744 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2745 struct pci_dev *pdev)
2746 {
2747 struct lan743x_tx *tx;
2748 int index;
2749 int ret;
2750
2751 adapter->intr.irq = adapter->pdev->irq;
2752 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2753
2754 ret = lan743x_gpio_init(adapter);
2755 if (ret)
2756 return ret;
2757
2758 ret = lan743x_mac_init(adapter);
2759 if (ret)
2760 return ret;
2761
2762 ret = lan743x_phy_init(adapter);
2763 if (ret)
2764 return ret;
2765
2766 ret = lan743x_ptp_init(adapter);
2767 if (ret)
2768 return ret;
2769
2770 lan743x_rfe_update_mac_address(adapter);
2771
2772 ret = lan743x_dmac_init(adapter);
2773 if (ret)
2774 return ret;
2775
2776 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2777 adapter->rx[index].adapter = adapter;
2778 adapter->rx[index].channel_number = index;
2779 }
2780
2781 tx = &adapter->tx[0];
2782 tx->adapter = adapter;
2783 tx->channel_number = 0;
2784 spin_lock_init(&tx->ring_lock);
2785 return 0;
2786 }
2787
lan743x_mdiobus_init(struct lan743x_adapter * adapter)2788 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2789 {
2790 int ret;
2791
2792 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2793 if (!(adapter->mdiobus)) {
2794 ret = -ENOMEM;
2795 goto return_error;
2796 }
2797
2798 adapter->mdiobus->priv = (void *)adapter;
2799 adapter->mdiobus->read = lan743x_mdiobus_read;
2800 adapter->mdiobus->write = lan743x_mdiobus_write;
2801 adapter->mdiobus->name = "lan743x-mdiobus";
2802 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2803 "pci-%s", pci_name(adapter->pdev));
2804
2805 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2806 /* LAN7430 uses internal phy at address 1 */
2807 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2808
2809 /* register mdiobus */
2810 ret = mdiobus_register(adapter->mdiobus);
2811 if (ret < 0)
2812 goto return_error;
2813 return 0;
2814
2815 return_error:
2816 return ret;
2817 }
2818
2819 /* lan743x_pcidev_probe - Device Initialization Routine
2820 * @pdev: PCI device information struct
2821 * @id: entry in lan743x_pci_tbl
2822 *
2823 * Returns 0 on success, negative on failure
2824 *
2825 * initializes an adapter identified by a pci_dev structure.
2826 * The OS initialization, configuring of the adapter private structure,
2827 * and a hardware reset occur.
2828 **/
lan743x_pcidev_probe(struct pci_dev * pdev,const struct pci_device_id * id)2829 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2830 const struct pci_device_id *id)
2831 {
2832 struct lan743x_adapter *adapter = NULL;
2833 struct net_device *netdev = NULL;
2834 const void *mac_addr;
2835 int ret = -ENODEV;
2836
2837 netdev = devm_alloc_etherdev(&pdev->dev,
2838 sizeof(struct lan743x_adapter));
2839 if (!netdev)
2840 goto return_error;
2841
2842 SET_NETDEV_DEV(netdev, &pdev->dev);
2843 pci_set_drvdata(pdev, netdev);
2844 adapter = netdev_priv(netdev);
2845 adapter->netdev = netdev;
2846 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2847 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2848 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2849 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2850
2851 mac_addr = of_get_mac_address(pdev->dev.of_node);
2852 if (!IS_ERR(mac_addr))
2853 ether_addr_copy(adapter->mac_address, mac_addr);
2854
2855 ret = lan743x_pci_init(adapter, pdev);
2856 if (ret)
2857 goto return_error;
2858
2859 ret = lan743x_csr_init(adapter);
2860 if (ret)
2861 goto cleanup_pci;
2862
2863 ret = lan743x_hardware_init(adapter, pdev);
2864 if (ret)
2865 goto cleanup_pci;
2866
2867 ret = lan743x_mdiobus_init(adapter);
2868 if (ret)
2869 goto cleanup_hardware;
2870
2871 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2872 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2873 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2874 adapter->netdev->hw_features = adapter->netdev->features;
2875
2876 /* carrier off reporting is important to ethtool even BEFORE open */
2877 netif_carrier_off(netdev);
2878
2879 ret = register_netdev(adapter->netdev);
2880 if (ret < 0)
2881 goto cleanup_mdiobus;
2882 return 0;
2883
2884 cleanup_mdiobus:
2885 lan743x_mdiobus_cleanup(adapter);
2886
2887 cleanup_hardware:
2888 lan743x_hardware_cleanup(adapter);
2889
2890 cleanup_pci:
2891 lan743x_pci_cleanup(adapter);
2892
2893 return_error:
2894 pr_warn("Initialization failed\n");
2895 return ret;
2896 }
2897
2898 /**
2899 * lan743x_pcidev_remove - Device Removal Routine
2900 * @pdev: PCI device information struct
2901 *
2902 * this is called by the PCI subsystem to alert the driver
2903 * that it should release a PCI device. This could be caused by a
2904 * Hot-Plug event, or because the driver is going to be removed from
2905 * memory.
2906 **/
lan743x_pcidev_remove(struct pci_dev * pdev)2907 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2908 {
2909 struct net_device *netdev = pci_get_drvdata(pdev);
2910 struct lan743x_adapter *adapter = netdev_priv(netdev);
2911
2912 lan743x_full_cleanup(adapter);
2913 }
2914
lan743x_pcidev_shutdown(struct pci_dev * pdev)2915 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2916 {
2917 struct net_device *netdev = pci_get_drvdata(pdev);
2918 struct lan743x_adapter *adapter = netdev_priv(netdev);
2919
2920 rtnl_lock();
2921 netif_device_detach(netdev);
2922
2923 /* close netdev when netdev is at running state.
2924 * For instance, it is true when system goes to sleep by pm-suspend
2925 * However, it is false when system goes to sleep by suspend GUI menu
2926 */
2927 if (netif_running(netdev))
2928 lan743x_netdev_close(netdev);
2929 rtnl_unlock();
2930
2931 #ifdef CONFIG_PM
2932 pci_save_state(pdev);
2933 #endif
2934
2935 /* clean up lan743x portion */
2936 lan743x_hardware_cleanup(adapter);
2937 }
2938
2939 #ifdef CONFIG_PM_SLEEP
lan743x_pm_wakeframe_crc16(const u8 * buf,int len)2940 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2941 {
2942 return bitrev16(crc16(0xFFFF, buf, len));
2943 }
2944
lan743x_pm_set_wol(struct lan743x_adapter * adapter)2945 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2946 {
2947 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2948 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2949 const u8 arp_type[2] = { 0x08, 0x06 };
2950 int mask_index;
2951 u32 pmtctl;
2952 u32 wucsr;
2953 u32 macrx;
2954 u16 crc;
2955
2956 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2957 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2958
2959 /* clear wake settings */
2960 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2961 pmtctl |= PMT_CTL_WUPS_MASK_;
2962 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2963 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2964 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2965
2966 macrx = lan743x_csr_read(adapter, MAC_RX);
2967
2968 wucsr = 0;
2969 mask_index = 0;
2970
2971 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2972
2973 if (adapter->wolopts & WAKE_PHY) {
2974 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2975 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2976 }
2977 if (adapter->wolopts & WAKE_MAGIC) {
2978 wucsr |= MAC_WUCSR_MPEN_;
2979 macrx |= MAC_RX_RXEN_;
2980 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2981 }
2982 if (adapter->wolopts & WAKE_UCAST) {
2983 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2984 macrx |= MAC_RX_RXEN_;
2985 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2986 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2987 }
2988 if (adapter->wolopts & WAKE_BCAST) {
2989 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2990 macrx |= MAC_RX_RXEN_;
2991 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2992 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2993 }
2994 if (adapter->wolopts & WAKE_MCAST) {
2995 /* IPv4 multicast */
2996 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2997 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2998 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2999 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3000 (crc & MAC_WUF_CFG_CRC16_MASK_));
3001 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
3002 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3003 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3004 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3005 mask_index++;
3006
3007 /* IPv6 multicast */
3008 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
3009 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3010 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3011 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3012 (crc & MAC_WUF_CFG_CRC16_MASK_));
3013 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
3014 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3015 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3016 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3017 mask_index++;
3018
3019 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3020 macrx |= MAC_RX_RXEN_;
3021 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3022 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3023 }
3024 if (adapter->wolopts & WAKE_ARP) {
3025 /* set MAC_WUF_CFG & WUF_MASK
3026 * for packettype (offset 12,13) = ARP (0x0806)
3027 */
3028 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
3029 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3030 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
3031 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3032 (crc & MAC_WUF_CFG_CRC16_MASK_));
3033 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
3034 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3035 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3036 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3037 mask_index++;
3038
3039 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3040 macrx |= MAC_RX_RXEN_;
3041 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3042 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3043 }
3044
3045 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3046 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3047 lan743x_csr_write(adapter, MAC_RX, macrx);
3048 }
3049
lan743x_pm_suspend(struct device * dev)3050 static int lan743x_pm_suspend(struct device *dev)
3051 {
3052 struct pci_dev *pdev = to_pci_dev(dev);
3053 struct net_device *netdev = pci_get_drvdata(pdev);
3054 struct lan743x_adapter *adapter = netdev_priv(netdev);
3055
3056 lan743x_pcidev_shutdown(pdev);
3057
3058 /* clear all wakes */
3059 lan743x_csr_write(adapter, MAC_WUCSR, 0);
3060 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3061 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3062
3063 if (adapter->wolopts)
3064 lan743x_pm_set_wol(adapter);
3065
3066 /* Host sets PME_En, put D3hot */
3067 return pci_prepare_to_sleep(pdev);;
3068 }
3069
lan743x_pm_resume(struct device * dev)3070 static int lan743x_pm_resume(struct device *dev)
3071 {
3072 struct pci_dev *pdev = to_pci_dev(dev);
3073 struct net_device *netdev = pci_get_drvdata(pdev);
3074 struct lan743x_adapter *adapter = netdev_priv(netdev);
3075 int ret;
3076
3077 pci_set_power_state(pdev, PCI_D0);
3078 pci_restore_state(pdev);
3079 pci_save_state(pdev);
3080
3081 ret = lan743x_hardware_init(adapter, pdev);
3082 if (ret) {
3083 netif_err(adapter, probe, adapter->netdev,
3084 "lan743x_hardware_init returned %d\n", ret);
3085 lan743x_pci_cleanup(adapter);
3086 return ret;
3087 }
3088
3089 /* open netdev when netdev is at running state while resume.
3090 * For instance, it is true when system wakesup after pm-suspend
3091 * However, it is false when system wakes up after suspend GUI menu
3092 */
3093 if (netif_running(netdev))
3094 lan743x_netdev_open(netdev);
3095
3096 netif_device_attach(netdev);
3097
3098 return 0;
3099 }
3100
3101 static const struct dev_pm_ops lan743x_pm_ops = {
3102 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3103 };
3104 #endif /* CONFIG_PM_SLEEP */
3105
3106 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3107 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3108 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3109 { 0, }
3110 };
3111
3112 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3113
3114 static struct pci_driver lan743x_pcidev_driver = {
3115 .name = DRIVER_NAME,
3116 .id_table = lan743x_pcidev_tbl,
3117 .probe = lan743x_pcidev_probe,
3118 .remove = lan743x_pcidev_remove,
3119 #ifdef CONFIG_PM_SLEEP
3120 .driver.pm = &lan743x_pm_ops,
3121 #endif
3122 .shutdown = lan743x_pcidev_shutdown,
3123 };
3124
3125 module_pci_driver(lan743x_pcidev_driver);
3126
3127 MODULE_AUTHOR(DRIVER_AUTHOR);
3128 MODULE_DESCRIPTION(DRIVER_DESC);
3129 MODULE_LICENSE("GPL");
3130