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,u8 duplex,u16 local_adv,u16 remote_adv)924 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
925 u8 duplex, u16 local_adv,
926 u16 remote_adv)
927 {
928 struct lan743x_phy *phy = &adapter->phy;
929 u8 cap;
930
931 if (phy->fc_autoneg)
932 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
933 else
934 cap = phy->fc_request_control;
935
936 lan743x_mac_flow_ctrl_set_enables(adapter,
937 cap & FLOW_CTRL_TX,
938 cap & FLOW_CTRL_RX);
939 }
940
lan743x_phy_init(struct lan743x_adapter * adapter)941 static int lan743x_phy_init(struct lan743x_adapter *adapter)
942 {
943 return lan743x_phy_reset(adapter);
944 }
945
lan743x_phy_link_status_change(struct net_device * netdev)946 static void lan743x_phy_link_status_change(struct net_device *netdev)
947 {
948 struct lan743x_adapter *adapter = netdev_priv(netdev);
949 struct phy_device *phydev = netdev->phydev;
950 u32 data;
951
952 phy_print_status(phydev);
953 if (phydev->state == PHY_RUNNING) {
954 struct ethtool_link_ksettings ksettings;
955 int remote_advertisement = 0;
956 int local_advertisement = 0;
957
958 data = lan743x_csr_read(adapter, MAC_CR);
959
960 /* set interface mode */
961 if (phy_interface_mode_is_rgmii(adapter->phy_mode))
962 /* RGMII */
963 data &= ~MAC_CR_MII_EN_;
964 else
965 /* GMII */
966 data |= MAC_CR_MII_EN_;
967
968 /* set duplex mode */
969 if (phydev->duplex)
970 data |= MAC_CR_DPX_;
971 else
972 data &= ~MAC_CR_DPX_;
973
974 /* set bus speed */
975 switch (phydev->speed) {
976 case SPEED_10:
977 data &= ~MAC_CR_CFG_H_;
978 data &= ~MAC_CR_CFG_L_;
979 break;
980 case SPEED_100:
981 data &= ~MAC_CR_CFG_H_;
982 data |= MAC_CR_CFG_L_;
983 break;
984 case SPEED_1000:
985 data |= MAC_CR_CFG_H_;
986 data &= ~MAC_CR_CFG_L_;
987 break;
988 }
989 lan743x_csr_write(adapter, MAC_CR, data);
990
991 memset(&ksettings, 0, sizeof(ksettings));
992 phy_ethtool_get_link_ksettings(netdev, &ksettings);
993 local_advertisement =
994 linkmode_adv_to_mii_adv_t(phydev->advertising);
995 remote_advertisement =
996 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
997
998 lan743x_phy_update_flowcontrol(adapter,
999 ksettings.base.duplex,
1000 local_advertisement,
1001 remote_advertisement);
1002 lan743x_ptp_update_latency(adapter, ksettings.base.speed);
1003 }
1004 }
1005
lan743x_phy_close(struct lan743x_adapter * adapter)1006 static void lan743x_phy_close(struct lan743x_adapter *adapter)
1007 {
1008 struct net_device *netdev = adapter->netdev;
1009
1010 phy_stop(netdev->phydev);
1011 phy_disconnect(netdev->phydev);
1012 netdev->phydev = NULL;
1013 }
1014
lan743x_phy_open(struct lan743x_adapter * adapter)1015 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1016 {
1017 struct lan743x_phy *phy = &adapter->phy;
1018 struct phy_device *phydev = NULL;
1019 struct device_node *phynode;
1020 struct net_device *netdev;
1021 int ret = -EIO;
1022
1023 netdev = adapter->netdev;
1024 phynode = of_node_get(adapter->pdev->dev.of_node);
1025
1026 if (phynode) {
1027 /* try devicetree phy, or fixed link */
1028 of_get_phy_mode(phynode, &adapter->phy_mode);
1029
1030 if (of_phy_is_fixed_link(phynode)) {
1031 ret = of_phy_register_fixed_link(phynode);
1032 if (ret) {
1033 netdev_err(netdev,
1034 "cannot register fixed PHY\n");
1035 of_node_put(phynode);
1036 goto return_error;
1037 }
1038 }
1039 phydev = of_phy_connect(netdev, phynode,
1040 lan743x_phy_link_status_change, 0,
1041 adapter->phy_mode);
1042 of_node_put(phynode);
1043 }
1044
1045 if (!phydev) {
1046 /* try internal phy */
1047 phydev = phy_find_first(adapter->mdiobus);
1048 if (!phydev)
1049 goto return_error;
1050
1051 adapter->phy_mode = PHY_INTERFACE_MODE_GMII;
1052 ret = phy_connect_direct(netdev, phydev,
1053 lan743x_phy_link_status_change,
1054 adapter->phy_mode);
1055 if (ret)
1056 goto return_error;
1057 }
1058
1059 /* MAC doesn't support 1000T Half */
1060 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1061
1062 /* support both flow controls */
1063 phy_support_asym_pause(phydev);
1064 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1065 phy->fc_autoneg = phydev->autoneg;
1066
1067 phy_start(phydev);
1068 phy_start_aneg(phydev);
1069 return 0;
1070
1071 return_error:
1072 return ret;
1073 }
1074
lan743x_rfe_open(struct lan743x_adapter * adapter)1075 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1076 {
1077 lan743x_csr_write(adapter, RFE_RSS_CFG,
1078 RFE_RSS_CFG_UDP_IPV6_EX_ |
1079 RFE_RSS_CFG_TCP_IPV6_EX_ |
1080 RFE_RSS_CFG_IPV6_EX_ |
1081 RFE_RSS_CFG_UDP_IPV6_ |
1082 RFE_RSS_CFG_TCP_IPV6_ |
1083 RFE_RSS_CFG_IPV6_ |
1084 RFE_RSS_CFG_UDP_IPV4_ |
1085 RFE_RSS_CFG_TCP_IPV4_ |
1086 RFE_RSS_CFG_IPV4_ |
1087 RFE_RSS_CFG_VALID_HASH_BITS_ |
1088 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1089 RFE_RSS_CFG_RSS_HASH_STORE_ |
1090 RFE_RSS_CFG_RSS_ENABLE_);
1091 }
1092
lan743x_rfe_update_mac_address(struct lan743x_adapter * adapter)1093 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1094 {
1095 u8 *mac_addr;
1096 u32 mac_addr_hi = 0;
1097 u32 mac_addr_lo = 0;
1098
1099 /* Add mac address to perfect Filter */
1100 mac_addr = adapter->mac_address;
1101 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1102 (((u32)(mac_addr[1])) << 8) |
1103 (((u32)(mac_addr[2])) << 16) |
1104 (((u32)(mac_addr[3])) << 24));
1105 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1106 (((u32)(mac_addr[5])) << 8));
1107
1108 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1109 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1110 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1111 }
1112
lan743x_rfe_set_multicast(struct lan743x_adapter * adapter)1113 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1114 {
1115 struct net_device *netdev = adapter->netdev;
1116 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1117 u32 rfctl;
1118 u32 data;
1119
1120 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1121 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1122 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1123 rfctl |= RFE_CTL_AB_;
1124 if (netdev->flags & IFF_PROMISC) {
1125 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1126 } else {
1127 if (netdev->flags & IFF_ALLMULTI)
1128 rfctl |= RFE_CTL_AM_;
1129 }
1130
1131 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1132 if (netdev_mc_count(netdev)) {
1133 struct netdev_hw_addr *ha;
1134 int i;
1135
1136 rfctl |= RFE_CTL_DA_PERFECT_;
1137 i = 1;
1138 netdev_for_each_mc_addr(ha, netdev) {
1139 /* set first 32 into Perfect Filter */
1140 if (i < 33) {
1141 lan743x_csr_write(adapter,
1142 RFE_ADDR_FILT_HI(i), 0);
1143 data = ha->addr[3];
1144 data = ha->addr[2] | (data << 8);
1145 data = ha->addr[1] | (data << 8);
1146 data = ha->addr[0] | (data << 8);
1147 lan743x_csr_write(adapter,
1148 RFE_ADDR_FILT_LO(i), data);
1149 data = ha->addr[5];
1150 data = ha->addr[4] | (data << 8);
1151 data |= RFE_ADDR_FILT_HI_VALID_;
1152 lan743x_csr_write(adapter,
1153 RFE_ADDR_FILT_HI(i), data);
1154 } else {
1155 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1156 23) & 0x1FF;
1157 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1158 rfctl |= RFE_CTL_MCAST_HASH_;
1159 }
1160 i++;
1161 }
1162 }
1163
1164 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1165 DP_SEL_VHF_VLAN_LEN,
1166 DP_SEL_VHF_HASH_LEN, hash_table);
1167 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1168 }
1169
lan743x_dmac_init(struct lan743x_adapter * adapter)1170 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1171 {
1172 u32 data = 0;
1173
1174 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1175 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1176 0, 1000, 20000, 100);
1177 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1178 case DMA_DESCRIPTOR_SPACING_16:
1179 data = DMAC_CFG_MAX_DSPACE_16_;
1180 break;
1181 case DMA_DESCRIPTOR_SPACING_32:
1182 data = DMAC_CFG_MAX_DSPACE_32_;
1183 break;
1184 case DMA_DESCRIPTOR_SPACING_64:
1185 data = DMAC_CFG_MAX_DSPACE_64_;
1186 break;
1187 case DMA_DESCRIPTOR_SPACING_128:
1188 data = DMAC_CFG_MAX_DSPACE_128_;
1189 break;
1190 default:
1191 return -EPERM;
1192 }
1193 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1194 data |= DMAC_CFG_COAL_EN_;
1195 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1196 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1197 lan743x_csr_write(adapter, DMAC_CFG, data);
1198 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1199 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1200 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1201 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1202 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1203 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1204 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1205 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1206 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1207 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1208 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1209 return 0;
1210 }
1211
lan743x_dmac_tx_get_state(struct lan743x_adapter * adapter,int tx_channel)1212 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1213 int tx_channel)
1214 {
1215 u32 dmac_cmd = 0;
1216
1217 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1218 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1219 DMAC_CMD_START_T_(tx_channel)),
1220 (dmac_cmd &
1221 DMAC_CMD_STOP_T_(tx_channel)));
1222 }
1223
lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter * adapter,int tx_channel)1224 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1225 int tx_channel)
1226 {
1227 int timeout = 100;
1228 int result = 0;
1229
1230 while (timeout &&
1231 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1232 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1233 usleep_range(1000, 20000);
1234 timeout--;
1235 }
1236 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1237 result = -ENODEV;
1238 return result;
1239 }
1240
lan743x_dmac_rx_get_state(struct lan743x_adapter * adapter,int rx_channel)1241 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1242 int rx_channel)
1243 {
1244 u32 dmac_cmd = 0;
1245
1246 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1247 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1248 DMAC_CMD_START_R_(rx_channel)),
1249 (dmac_cmd &
1250 DMAC_CMD_STOP_R_(rx_channel)));
1251 }
1252
lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter * adapter,int rx_channel)1253 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1254 int rx_channel)
1255 {
1256 int timeout = 100;
1257 int result = 0;
1258
1259 while (timeout &&
1260 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1261 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1262 usleep_range(1000, 20000);
1263 timeout--;
1264 }
1265 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1266 result = -ENODEV;
1267 return result;
1268 }
1269
lan743x_tx_release_desc(struct lan743x_tx * tx,int descriptor_index,bool cleanup)1270 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1271 int descriptor_index, bool cleanup)
1272 {
1273 struct lan743x_tx_buffer_info *buffer_info = NULL;
1274 struct lan743x_tx_descriptor *descriptor = NULL;
1275 u32 descriptor_type = 0;
1276 bool ignore_sync;
1277
1278 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1279 buffer_info = &tx->buffer_info[descriptor_index];
1280 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1281 goto done;
1282
1283 descriptor_type = (descriptor->data0) &
1284 TX_DESC_DATA0_DTYPE_MASK_;
1285 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1286 goto clean_up_data_descriptor;
1287 else
1288 goto clear_active;
1289
1290 clean_up_data_descriptor:
1291 if (buffer_info->dma_ptr) {
1292 if (buffer_info->flags &
1293 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1294 dma_unmap_page(&tx->adapter->pdev->dev,
1295 buffer_info->dma_ptr,
1296 buffer_info->buffer_length,
1297 DMA_TO_DEVICE);
1298 } else {
1299 dma_unmap_single(&tx->adapter->pdev->dev,
1300 buffer_info->dma_ptr,
1301 buffer_info->buffer_length,
1302 DMA_TO_DEVICE);
1303 }
1304 buffer_info->dma_ptr = 0;
1305 buffer_info->buffer_length = 0;
1306 }
1307 if (!buffer_info->skb)
1308 goto clear_active;
1309
1310 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1311 dev_kfree_skb_any(buffer_info->skb);
1312 goto clear_skb;
1313 }
1314
1315 if (cleanup) {
1316 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1317 dev_kfree_skb_any(buffer_info->skb);
1318 } else {
1319 ignore_sync = (buffer_info->flags &
1320 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1321 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1322 buffer_info->skb, ignore_sync);
1323 }
1324
1325 clear_skb:
1326 buffer_info->skb = NULL;
1327
1328 clear_active:
1329 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1330
1331 done:
1332 memset(buffer_info, 0, sizeof(*buffer_info));
1333 memset(descriptor, 0, sizeof(*descriptor));
1334 }
1335
lan743x_tx_next_index(struct lan743x_tx * tx,int index)1336 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1337 {
1338 return ((++index) % tx->ring_size);
1339 }
1340
lan743x_tx_release_completed_descriptors(struct lan743x_tx * tx)1341 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1342 {
1343 while ((*tx->head_cpu_ptr) != (tx->last_head)) {
1344 lan743x_tx_release_desc(tx, tx->last_head, false);
1345 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1346 }
1347 }
1348
lan743x_tx_release_all_descriptors(struct lan743x_tx * tx)1349 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1350 {
1351 u32 original_head = 0;
1352
1353 original_head = tx->last_head;
1354 do {
1355 lan743x_tx_release_desc(tx, tx->last_head, true);
1356 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1357 } while (tx->last_head != original_head);
1358 memset(tx->ring_cpu_ptr, 0,
1359 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1360 memset(tx->buffer_info, 0,
1361 sizeof(*tx->buffer_info) * (tx->ring_size));
1362 }
1363
lan743x_tx_get_desc_cnt(struct lan743x_tx * tx,struct sk_buff * skb)1364 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1365 struct sk_buff *skb)
1366 {
1367 int result = 1; /* 1 for the main skb buffer */
1368 int nr_frags = 0;
1369
1370 if (skb_is_gso(skb))
1371 result++; /* requires an extension descriptor */
1372 nr_frags = skb_shinfo(skb)->nr_frags;
1373 result += nr_frags; /* 1 for each fragment buffer */
1374 return result;
1375 }
1376
lan743x_tx_get_avail_desc(struct lan743x_tx * tx)1377 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1378 {
1379 int last_head = tx->last_head;
1380 int last_tail = tx->last_tail;
1381
1382 if (last_tail >= last_head)
1383 return tx->ring_size - last_tail + last_head - 1;
1384 else
1385 return last_head - last_tail - 1;
1386 }
1387
lan743x_tx_set_timestamping_mode(struct lan743x_tx * tx,bool enable_timestamping,bool enable_onestep_sync)1388 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1389 bool enable_timestamping,
1390 bool enable_onestep_sync)
1391 {
1392 if (enable_timestamping)
1393 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1394 else
1395 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1396 if (enable_onestep_sync)
1397 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1398 else
1399 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1400 }
1401
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)1402 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1403 unsigned char *first_buffer,
1404 unsigned int first_buffer_length,
1405 unsigned int frame_length,
1406 bool time_stamp,
1407 bool check_sum)
1408 {
1409 /* called only from within lan743x_tx_xmit_frame.
1410 * assuming tx->ring_lock has already been acquired.
1411 */
1412 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1413 struct lan743x_tx_buffer_info *buffer_info = NULL;
1414 struct lan743x_adapter *adapter = tx->adapter;
1415 struct device *dev = &adapter->pdev->dev;
1416 dma_addr_t dma_ptr;
1417
1418 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1419 tx->frame_first = tx->last_tail;
1420 tx->frame_tail = tx->frame_first;
1421
1422 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1423 buffer_info = &tx->buffer_info[tx->frame_tail];
1424 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1425 DMA_TO_DEVICE);
1426 if (dma_mapping_error(dev, dma_ptr))
1427 return -ENOMEM;
1428
1429 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1430 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1431 tx_descriptor->data3 = (frame_length << 16) &
1432 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1433
1434 buffer_info->skb = NULL;
1435 buffer_info->dma_ptr = dma_ptr;
1436 buffer_info->buffer_length = first_buffer_length;
1437 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1438
1439 tx->frame_data0 = (first_buffer_length &
1440 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1441 TX_DESC_DATA0_DTYPE_DATA_ |
1442 TX_DESC_DATA0_FS_ |
1443 TX_DESC_DATA0_FCS_;
1444 if (time_stamp)
1445 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1446
1447 if (check_sum)
1448 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1449 TX_DESC_DATA0_IPE_ |
1450 TX_DESC_DATA0_TPE_;
1451
1452 /* data0 will be programmed in one of other frame assembler functions */
1453 return 0;
1454 }
1455
lan743x_tx_frame_add_lso(struct lan743x_tx * tx,unsigned int frame_length,int nr_frags)1456 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1457 unsigned int frame_length,
1458 int nr_frags)
1459 {
1460 /* called only from within lan743x_tx_xmit_frame.
1461 * assuming tx->ring_lock has already been acquired.
1462 */
1463 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1464 struct lan743x_tx_buffer_info *buffer_info = NULL;
1465
1466 /* wrap up previous descriptor */
1467 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1468 if (nr_frags <= 0) {
1469 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1470 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1471 }
1472 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1473 tx_descriptor->data0 = tx->frame_data0;
1474
1475 /* move to next descriptor */
1476 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1477 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1478 buffer_info = &tx->buffer_info[tx->frame_tail];
1479
1480 /* add extension descriptor */
1481 tx_descriptor->data1 = 0;
1482 tx_descriptor->data2 = 0;
1483 tx_descriptor->data3 = 0;
1484
1485 buffer_info->skb = NULL;
1486 buffer_info->dma_ptr = 0;
1487 buffer_info->buffer_length = 0;
1488 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1489
1490 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1491 TX_DESC_DATA0_DTYPE_EXT_ |
1492 TX_DESC_DATA0_EXT_LSO_;
1493
1494 /* data0 will be programmed in one of other frame assembler functions */
1495 }
1496
lan743x_tx_frame_add_fragment(struct lan743x_tx * tx,const skb_frag_t * fragment,unsigned int frame_length)1497 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1498 const skb_frag_t *fragment,
1499 unsigned int frame_length)
1500 {
1501 /* called only from within lan743x_tx_xmit_frame
1502 * assuming tx->ring_lock has already been acquired
1503 */
1504 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1505 struct lan743x_tx_buffer_info *buffer_info = NULL;
1506 struct lan743x_adapter *adapter = tx->adapter;
1507 struct device *dev = &adapter->pdev->dev;
1508 unsigned int fragment_length = 0;
1509 dma_addr_t dma_ptr;
1510
1511 fragment_length = skb_frag_size(fragment);
1512 if (!fragment_length)
1513 return 0;
1514
1515 /* wrap up previous descriptor */
1516 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1517 tx_descriptor->data0 = tx->frame_data0;
1518
1519 /* move to next descriptor */
1520 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1521 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1522 buffer_info = &tx->buffer_info[tx->frame_tail];
1523 dma_ptr = skb_frag_dma_map(dev, fragment,
1524 0, fragment_length,
1525 DMA_TO_DEVICE);
1526 if (dma_mapping_error(dev, dma_ptr)) {
1527 int desc_index;
1528
1529 /* cleanup all previously setup descriptors */
1530 desc_index = tx->frame_first;
1531 while (desc_index != tx->frame_tail) {
1532 lan743x_tx_release_desc(tx, desc_index, true);
1533 desc_index = lan743x_tx_next_index(tx, desc_index);
1534 }
1535 dma_wmb();
1536 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1537 tx->frame_first = 0;
1538 tx->frame_data0 = 0;
1539 tx->frame_tail = 0;
1540 return -ENOMEM;
1541 }
1542
1543 tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
1544 tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
1545 tx_descriptor->data3 = (frame_length << 16) &
1546 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
1547
1548 buffer_info->skb = NULL;
1549 buffer_info->dma_ptr = dma_ptr;
1550 buffer_info->buffer_length = fragment_length;
1551 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1552 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1553
1554 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1555 TX_DESC_DATA0_DTYPE_DATA_ |
1556 TX_DESC_DATA0_FCS_;
1557
1558 /* data0 will be programmed in one of other frame assembler functions */
1559 return 0;
1560 }
1561
lan743x_tx_frame_end(struct lan743x_tx * tx,struct sk_buff * skb,bool time_stamp,bool ignore_sync)1562 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1563 struct sk_buff *skb,
1564 bool time_stamp,
1565 bool ignore_sync)
1566 {
1567 /* called only from within lan743x_tx_xmit_frame
1568 * assuming tx->ring_lock has already been acquired
1569 */
1570 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1571 struct lan743x_tx_buffer_info *buffer_info = NULL;
1572 struct lan743x_adapter *adapter = tx->adapter;
1573 u32 tx_tail_flags = 0;
1574
1575 /* wrap up previous descriptor */
1576 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1577 TX_DESC_DATA0_DTYPE_DATA_) {
1578 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1579 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1580 }
1581
1582 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1583 buffer_info = &tx->buffer_info[tx->frame_tail];
1584 buffer_info->skb = skb;
1585 if (time_stamp)
1586 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1587 if (ignore_sync)
1588 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1589
1590 tx_descriptor->data0 = tx->frame_data0;
1591 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1592 tx->last_tail = tx->frame_tail;
1593
1594 dma_wmb();
1595
1596 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1597 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1598 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1599 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1600 TX_TAIL_SET_TOP_INT_EN_;
1601
1602 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1603 tx_tail_flags | tx->frame_tail);
1604 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1605 }
1606
lan743x_tx_xmit_frame(struct lan743x_tx * tx,struct sk_buff * skb)1607 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1608 struct sk_buff *skb)
1609 {
1610 int required_number_of_descriptors = 0;
1611 unsigned int start_frame_length = 0;
1612 unsigned int frame_length = 0;
1613 unsigned int head_length = 0;
1614 unsigned long irq_flags = 0;
1615 bool do_timestamp = false;
1616 bool ignore_sync = false;
1617 int nr_frags = 0;
1618 bool gso = false;
1619 int j;
1620
1621 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1622
1623 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1624 if (required_number_of_descriptors >
1625 lan743x_tx_get_avail_desc(tx)) {
1626 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1627 dev_kfree_skb_irq(skb);
1628 } else {
1629 /* save to overflow buffer */
1630 tx->overflow_skb = skb;
1631 netif_stop_queue(tx->adapter->netdev);
1632 }
1633 goto unlock;
1634 }
1635
1636 /* space available, transmit skb */
1637 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1638 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1639 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1640 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1641 do_timestamp = true;
1642 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1643 ignore_sync = true;
1644 }
1645 head_length = skb_headlen(skb);
1646 frame_length = skb_pagelen(skb);
1647 nr_frags = skb_shinfo(skb)->nr_frags;
1648 start_frame_length = frame_length;
1649 gso = skb_is_gso(skb);
1650 if (gso) {
1651 start_frame_length = max(skb_shinfo(skb)->gso_size,
1652 (unsigned short)8);
1653 }
1654
1655 if (lan743x_tx_frame_start(tx,
1656 skb->data, head_length,
1657 start_frame_length,
1658 do_timestamp,
1659 skb->ip_summed == CHECKSUM_PARTIAL)) {
1660 dev_kfree_skb_irq(skb);
1661 goto unlock;
1662 }
1663
1664 if (gso)
1665 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1666
1667 if (nr_frags <= 0)
1668 goto finish;
1669
1670 for (j = 0; j < nr_frags; j++) {
1671 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1672
1673 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1674 /* upon error no need to call
1675 * lan743x_tx_frame_end
1676 * frame assembler clean up was performed inside
1677 * lan743x_tx_frame_add_fragment
1678 */
1679 dev_kfree_skb_irq(skb);
1680 goto unlock;
1681 }
1682 }
1683
1684 finish:
1685 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1686
1687 unlock:
1688 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1689 return NETDEV_TX_OK;
1690 }
1691
lan743x_tx_napi_poll(struct napi_struct * napi,int weight)1692 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1693 {
1694 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1695 struct lan743x_adapter *adapter = tx->adapter;
1696 bool start_transmitter = false;
1697 unsigned long irq_flags = 0;
1698 u32 ioc_bit = 0;
1699
1700 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1701 lan743x_csr_read(adapter, DMAC_INT_STS);
1702 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1703 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1704 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1705
1706 /* clean up tx ring */
1707 lan743x_tx_release_completed_descriptors(tx);
1708 if (netif_queue_stopped(adapter->netdev)) {
1709 if (tx->overflow_skb) {
1710 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1711 lan743x_tx_get_avail_desc(tx))
1712 start_transmitter = true;
1713 } else {
1714 netif_wake_queue(adapter->netdev);
1715 }
1716 }
1717 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1718
1719 if (start_transmitter) {
1720 /* space is now available, transmit overflow skb */
1721 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1722 tx->overflow_skb = NULL;
1723 netif_wake_queue(adapter->netdev);
1724 }
1725
1726 if (!napi_complete(napi))
1727 goto done;
1728
1729 /* enable isr */
1730 lan743x_csr_write(adapter, INT_EN_SET,
1731 INT_BIT_DMA_TX_(tx->channel_number));
1732 lan743x_csr_read(adapter, INT_STS);
1733
1734 done:
1735 return 0;
1736 }
1737
lan743x_tx_ring_cleanup(struct lan743x_tx * tx)1738 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1739 {
1740 if (tx->head_cpu_ptr) {
1741 dma_free_coherent(&tx->adapter->pdev->dev,
1742 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1743 tx->head_dma_ptr);
1744 tx->head_cpu_ptr = NULL;
1745 tx->head_dma_ptr = 0;
1746 }
1747 kfree(tx->buffer_info);
1748 tx->buffer_info = NULL;
1749
1750 if (tx->ring_cpu_ptr) {
1751 dma_free_coherent(&tx->adapter->pdev->dev,
1752 tx->ring_allocation_size, tx->ring_cpu_ptr,
1753 tx->ring_dma_ptr);
1754 tx->ring_allocation_size = 0;
1755 tx->ring_cpu_ptr = NULL;
1756 tx->ring_dma_ptr = 0;
1757 }
1758 tx->ring_size = 0;
1759 }
1760
lan743x_tx_ring_init(struct lan743x_tx * tx)1761 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1762 {
1763 size_t ring_allocation_size = 0;
1764 void *cpu_ptr = NULL;
1765 dma_addr_t dma_ptr;
1766 int ret = -ENOMEM;
1767
1768 tx->ring_size = LAN743X_TX_RING_SIZE;
1769 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1770 ret = -EINVAL;
1771 goto cleanup;
1772 }
1773 ring_allocation_size = ALIGN(tx->ring_size *
1774 sizeof(struct lan743x_tx_descriptor),
1775 PAGE_SIZE);
1776 dma_ptr = 0;
1777 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1778 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1779 if (!cpu_ptr) {
1780 ret = -ENOMEM;
1781 goto cleanup;
1782 }
1783
1784 tx->ring_allocation_size = ring_allocation_size;
1785 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1786 tx->ring_dma_ptr = dma_ptr;
1787
1788 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1789 if (!cpu_ptr) {
1790 ret = -ENOMEM;
1791 goto cleanup;
1792 }
1793 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1794 dma_ptr = 0;
1795 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1796 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1797 GFP_KERNEL);
1798 if (!cpu_ptr) {
1799 ret = -ENOMEM;
1800 goto cleanup;
1801 }
1802
1803 tx->head_cpu_ptr = cpu_ptr;
1804 tx->head_dma_ptr = dma_ptr;
1805 if (tx->head_dma_ptr & 0x3) {
1806 ret = -ENOMEM;
1807 goto cleanup;
1808 }
1809
1810 return 0;
1811
1812 cleanup:
1813 lan743x_tx_ring_cleanup(tx);
1814 return ret;
1815 }
1816
lan743x_tx_close(struct lan743x_tx * tx)1817 static void lan743x_tx_close(struct lan743x_tx *tx)
1818 {
1819 struct lan743x_adapter *adapter = tx->adapter;
1820
1821 lan743x_csr_write(adapter,
1822 DMAC_CMD,
1823 DMAC_CMD_STOP_T_(tx->channel_number));
1824 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1825
1826 lan743x_csr_write(adapter,
1827 DMAC_INT_EN_CLR,
1828 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1829 lan743x_csr_write(adapter, INT_EN_CLR,
1830 INT_BIT_DMA_TX_(tx->channel_number));
1831 napi_disable(&tx->napi);
1832 netif_napi_del(&tx->napi);
1833
1834 lan743x_csr_write(adapter, FCT_TX_CTL,
1835 FCT_TX_CTL_DIS_(tx->channel_number));
1836 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1837 FCT_TX_CTL_EN_(tx->channel_number),
1838 0, 1000, 20000, 100);
1839
1840 lan743x_tx_release_all_descriptors(tx);
1841
1842 if (tx->overflow_skb) {
1843 dev_kfree_skb(tx->overflow_skb);
1844 tx->overflow_skb = NULL;
1845 }
1846
1847 lan743x_tx_ring_cleanup(tx);
1848 }
1849
lan743x_tx_open(struct lan743x_tx * tx)1850 static int lan743x_tx_open(struct lan743x_tx *tx)
1851 {
1852 struct lan743x_adapter *adapter = NULL;
1853 u32 data = 0;
1854 int ret;
1855
1856 adapter = tx->adapter;
1857 ret = lan743x_tx_ring_init(tx);
1858 if (ret)
1859 return ret;
1860
1861 /* initialize fifo */
1862 lan743x_csr_write(adapter, FCT_TX_CTL,
1863 FCT_TX_CTL_RESET_(tx->channel_number));
1864 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1865 FCT_TX_CTL_RESET_(tx->channel_number),
1866 0, 1000, 20000, 100);
1867
1868 /* enable fifo */
1869 lan743x_csr_write(adapter, FCT_TX_CTL,
1870 FCT_TX_CTL_EN_(tx->channel_number));
1871
1872 /* reset tx channel */
1873 lan743x_csr_write(adapter, DMAC_CMD,
1874 DMAC_CMD_TX_SWR_(tx->channel_number));
1875 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1876 DMAC_CMD_TX_SWR_(tx->channel_number),
1877 0, 1000, 20000, 100);
1878
1879 /* Write TX_BASE_ADDR */
1880 lan743x_csr_write(adapter,
1881 TX_BASE_ADDRH(tx->channel_number),
1882 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1883 lan743x_csr_write(adapter,
1884 TX_BASE_ADDRL(tx->channel_number),
1885 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1886
1887 /* Write TX_CFG_B */
1888 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1889 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1890 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1891 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1892 data |= TX_CFG_B_TDMABL_512_;
1893 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1894
1895 /* Write TX_CFG_A */
1896 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1897 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1898 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1899 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1900 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1901 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1902 }
1903 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1904
1905 /* Write TX_HEAD_WRITEBACK_ADDR */
1906 lan743x_csr_write(adapter,
1907 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1908 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1909 lan743x_csr_write(adapter,
1910 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1911 DMA_ADDR_LOW32(tx->head_dma_ptr));
1912
1913 /* set last head */
1914 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1915
1916 /* write TX_TAIL */
1917 tx->last_tail = 0;
1918 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1919 (u32)(tx->last_tail));
1920 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1921 INT_BIT_DMA_TX_
1922 (tx->channel_number));
1923 netif_tx_napi_add(adapter->netdev,
1924 &tx->napi, lan743x_tx_napi_poll,
1925 tx->ring_size - 1);
1926 napi_enable(&tx->napi);
1927
1928 data = 0;
1929 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1930 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1931 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1932 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1933 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1934 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1935 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1936 data |= TX_CFG_C_TX_INT_EN_R2C_;
1937 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1938
1939 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1940 lan743x_csr_write(adapter, INT_EN_SET,
1941 INT_BIT_DMA_TX_(tx->channel_number));
1942 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1943 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1944
1945 /* start dmac channel */
1946 lan743x_csr_write(adapter, DMAC_CMD,
1947 DMAC_CMD_START_T_(tx->channel_number));
1948 return 0;
1949 }
1950
lan743x_rx_next_index(struct lan743x_rx * rx,int index)1951 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1952 {
1953 return ((++index) % rx->ring_size);
1954 }
1955
lan743x_rx_allocate_skb(struct lan743x_rx * rx)1956 static struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx)
1957 {
1958 int length = 0;
1959
1960 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1961 return __netdev_alloc_skb(rx->adapter->netdev,
1962 length, GFP_ATOMIC | GFP_DMA);
1963 }
1964
lan743x_rx_init_ring_element(struct lan743x_rx * rx,int index,struct sk_buff * skb)1965 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
1966 struct sk_buff *skb)
1967 {
1968 struct lan743x_rx_buffer_info *buffer_info;
1969 struct lan743x_rx_descriptor *descriptor;
1970 int length = 0;
1971
1972 length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
1973 descriptor = &rx->ring_cpu_ptr[index];
1974 buffer_info = &rx->buffer_info[index];
1975 buffer_info->skb = skb;
1976 if (!(buffer_info->skb))
1977 return -ENOMEM;
1978 buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
1979 buffer_info->skb->data,
1980 length,
1981 DMA_FROM_DEVICE);
1982 if (dma_mapping_error(&rx->adapter->pdev->dev,
1983 buffer_info->dma_ptr)) {
1984 buffer_info->dma_ptr = 0;
1985 return -ENOMEM;
1986 }
1987
1988 buffer_info->buffer_length = length;
1989 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
1990 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
1991 descriptor->data3 = 0;
1992 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
1993 (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
1994 skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
1995
1996 return 0;
1997 }
1998
lan743x_rx_reuse_ring_element(struct lan743x_rx * rx,int index)1999 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
2000 {
2001 struct lan743x_rx_buffer_info *buffer_info;
2002 struct lan743x_rx_descriptor *descriptor;
2003
2004 descriptor = &rx->ring_cpu_ptr[index];
2005 buffer_info = &rx->buffer_info[index];
2006
2007 descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
2008 descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
2009 descriptor->data3 = 0;
2010 descriptor->data0 = (RX_DESC_DATA0_OWN_ |
2011 ((buffer_info->buffer_length) &
2012 RX_DESC_DATA0_BUF_LENGTH_MASK_));
2013 }
2014
lan743x_rx_release_ring_element(struct lan743x_rx * rx,int index)2015 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2016 {
2017 struct lan743x_rx_buffer_info *buffer_info;
2018 struct lan743x_rx_descriptor *descriptor;
2019
2020 descriptor = &rx->ring_cpu_ptr[index];
2021 buffer_info = &rx->buffer_info[index];
2022
2023 memset(descriptor, 0, sizeof(*descriptor));
2024
2025 if (buffer_info->dma_ptr) {
2026 dma_unmap_single(&rx->adapter->pdev->dev,
2027 buffer_info->dma_ptr,
2028 buffer_info->buffer_length,
2029 DMA_FROM_DEVICE);
2030 buffer_info->dma_ptr = 0;
2031 }
2032
2033 if (buffer_info->skb) {
2034 dev_kfree_skb(buffer_info->skb);
2035 buffer_info->skb = NULL;
2036 }
2037
2038 memset(buffer_info, 0, sizeof(*buffer_info));
2039 }
2040
lan743x_rx_process_packet(struct lan743x_rx * rx)2041 static int lan743x_rx_process_packet(struct lan743x_rx *rx)
2042 {
2043 struct skb_shared_hwtstamps *hwtstamps = NULL;
2044 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2045 int current_head_index = *rx->head_cpu_ptr;
2046 struct lan743x_rx_buffer_info *buffer_info;
2047 struct lan743x_rx_descriptor *descriptor;
2048 int extension_index = -1;
2049 int first_index = -1;
2050 int last_index = -1;
2051
2052 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2053 goto done;
2054
2055 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2056 goto done;
2057
2058 if (rx->last_head != current_head_index) {
2059 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2060 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2061 goto done;
2062
2063 if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
2064 goto done;
2065
2066 first_index = rx->last_head;
2067 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2068 last_index = rx->last_head;
2069 } else {
2070 int index;
2071
2072 index = lan743x_rx_next_index(rx, first_index);
2073 while (index != current_head_index) {
2074 descriptor = &rx->ring_cpu_ptr[index];
2075 if (descriptor->data0 & RX_DESC_DATA0_OWN_)
2076 goto done;
2077
2078 if (descriptor->data0 & RX_DESC_DATA0_LS_) {
2079 last_index = index;
2080 break;
2081 }
2082 index = lan743x_rx_next_index(rx, index);
2083 }
2084 }
2085 if (last_index >= 0) {
2086 descriptor = &rx->ring_cpu_ptr[last_index];
2087 if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
2088 /* extension is expected to follow */
2089 int index = lan743x_rx_next_index(rx,
2090 last_index);
2091 if (index != current_head_index) {
2092 descriptor = &rx->ring_cpu_ptr[index];
2093 if (descriptor->data0 &
2094 RX_DESC_DATA0_OWN_) {
2095 goto done;
2096 }
2097 if (descriptor->data0 &
2098 RX_DESC_DATA0_EXT_) {
2099 extension_index = index;
2100 } else {
2101 goto done;
2102 }
2103 } else {
2104 /* extension is not yet available */
2105 /* prevent processing of this packet */
2106 first_index = -1;
2107 last_index = -1;
2108 }
2109 }
2110 }
2111 }
2112 if (first_index >= 0 && last_index >= 0) {
2113 int real_last_index = last_index;
2114 struct sk_buff *skb = NULL;
2115 u32 ts_sec = 0;
2116 u32 ts_nsec = 0;
2117
2118 /* packet is available */
2119 if (first_index == last_index) {
2120 /* single buffer packet */
2121 struct sk_buff *new_skb = NULL;
2122 int packet_length;
2123
2124 new_skb = lan743x_rx_allocate_skb(rx);
2125 if (!new_skb) {
2126 /* failed to allocate next skb.
2127 * Memory is very low.
2128 * Drop this packet and reuse buffer.
2129 */
2130 lan743x_rx_reuse_ring_element(rx, first_index);
2131 goto process_extension;
2132 }
2133
2134 buffer_info = &rx->buffer_info[first_index];
2135 skb = buffer_info->skb;
2136 descriptor = &rx->ring_cpu_ptr[first_index];
2137
2138 /* unmap from dma */
2139 if (buffer_info->dma_ptr) {
2140 dma_unmap_single(&rx->adapter->pdev->dev,
2141 buffer_info->dma_ptr,
2142 buffer_info->buffer_length,
2143 DMA_FROM_DEVICE);
2144 buffer_info->dma_ptr = 0;
2145 buffer_info->buffer_length = 0;
2146 }
2147 buffer_info->skb = NULL;
2148 packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
2149 (descriptor->data0);
2150 skb_put(skb, packet_length - 4);
2151 skb->protocol = eth_type_trans(skb,
2152 rx->adapter->netdev);
2153 lan743x_rx_init_ring_element(rx, first_index, new_skb);
2154 } else {
2155 int index = first_index;
2156
2157 /* multi buffer packet not supported */
2158 /* this should not happen since
2159 * buffers are allocated to be at least jumbo size
2160 */
2161
2162 /* clean up buffers */
2163 if (first_index <= last_index) {
2164 while ((index >= first_index) &&
2165 (index <= last_index)) {
2166 lan743x_rx_reuse_ring_element(rx,
2167 index);
2168 index = lan743x_rx_next_index(rx,
2169 index);
2170 }
2171 } else {
2172 while ((index >= first_index) ||
2173 (index <= last_index)) {
2174 lan743x_rx_reuse_ring_element(rx,
2175 index);
2176 index = lan743x_rx_next_index(rx,
2177 index);
2178 }
2179 }
2180 }
2181
2182 process_extension:
2183 if (extension_index >= 0) {
2184 descriptor = &rx->ring_cpu_ptr[extension_index];
2185 buffer_info = &rx->buffer_info[extension_index];
2186
2187 ts_sec = descriptor->data1;
2188 ts_nsec = (descriptor->data2 &
2189 RX_DESC_DATA2_TS_NS_MASK_);
2190 lan743x_rx_reuse_ring_element(rx, extension_index);
2191 real_last_index = extension_index;
2192 }
2193
2194 if (!skb) {
2195 result = RX_PROCESS_RESULT_PACKET_DROPPED;
2196 goto move_forward;
2197 }
2198
2199 if (extension_index < 0)
2200 goto pass_packet_to_os;
2201 hwtstamps = skb_hwtstamps(skb);
2202 if (hwtstamps)
2203 hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
2204
2205 pass_packet_to_os:
2206 /* pass packet to OS */
2207 napi_gro_receive(&rx->napi, skb);
2208 result = RX_PROCESS_RESULT_PACKET_RECEIVED;
2209
2210 move_forward:
2211 /* push tail and head forward */
2212 rx->last_tail = real_last_index;
2213 rx->last_head = lan743x_rx_next_index(rx, real_last_index);
2214 }
2215 done:
2216 return result;
2217 }
2218
lan743x_rx_napi_poll(struct napi_struct * napi,int weight)2219 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2220 {
2221 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2222 struct lan743x_adapter *adapter = rx->adapter;
2223 u32 rx_tail_flags = 0;
2224 int count;
2225
2226 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2227 /* clear int status bit before reading packet */
2228 lan743x_csr_write(adapter, DMAC_INT_STS,
2229 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2230 }
2231 count = 0;
2232 while (count < weight) {
2233 int rx_process_result = lan743x_rx_process_packet(rx);
2234
2235 if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
2236 count++;
2237 } else if (rx_process_result ==
2238 RX_PROCESS_RESULT_NOTHING_TO_DO) {
2239 break;
2240 } else if (rx_process_result ==
2241 RX_PROCESS_RESULT_PACKET_DROPPED) {
2242 continue;
2243 }
2244 }
2245 rx->frame_count += count;
2246 if (count == weight)
2247 goto done;
2248
2249 if (!napi_complete_done(napi, count))
2250 goto done;
2251
2252 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2253 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2254 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2255 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2256 } else {
2257 lan743x_csr_write(adapter, INT_EN_SET,
2258 INT_BIT_DMA_RX_(rx->channel_number));
2259 }
2260
2261 /* update RX_TAIL */
2262 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2263 rx_tail_flags | rx->last_tail);
2264 done:
2265 return count;
2266 }
2267
lan743x_rx_ring_cleanup(struct lan743x_rx * rx)2268 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2269 {
2270 if (rx->buffer_info && rx->ring_cpu_ptr) {
2271 int index;
2272
2273 for (index = 0; index < rx->ring_size; index++)
2274 lan743x_rx_release_ring_element(rx, index);
2275 }
2276
2277 if (rx->head_cpu_ptr) {
2278 dma_free_coherent(&rx->adapter->pdev->dev,
2279 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2280 rx->head_dma_ptr);
2281 rx->head_cpu_ptr = NULL;
2282 rx->head_dma_ptr = 0;
2283 }
2284
2285 kfree(rx->buffer_info);
2286 rx->buffer_info = NULL;
2287
2288 if (rx->ring_cpu_ptr) {
2289 dma_free_coherent(&rx->adapter->pdev->dev,
2290 rx->ring_allocation_size, rx->ring_cpu_ptr,
2291 rx->ring_dma_ptr);
2292 rx->ring_allocation_size = 0;
2293 rx->ring_cpu_ptr = NULL;
2294 rx->ring_dma_ptr = 0;
2295 }
2296
2297 rx->ring_size = 0;
2298 rx->last_head = 0;
2299 }
2300
lan743x_rx_ring_init(struct lan743x_rx * rx)2301 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2302 {
2303 size_t ring_allocation_size = 0;
2304 dma_addr_t dma_ptr = 0;
2305 void *cpu_ptr = NULL;
2306 int ret = -ENOMEM;
2307 int index = 0;
2308
2309 rx->ring_size = LAN743X_RX_RING_SIZE;
2310 if (rx->ring_size <= 1) {
2311 ret = -EINVAL;
2312 goto cleanup;
2313 }
2314 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2315 ret = -EINVAL;
2316 goto cleanup;
2317 }
2318 ring_allocation_size = ALIGN(rx->ring_size *
2319 sizeof(struct lan743x_rx_descriptor),
2320 PAGE_SIZE);
2321 dma_ptr = 0;
2322 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2323 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2324 if (!cpu_ptr) {
2325 ret = -ENOMEM;
2326 goto cleanup;
2327 }
2328 rx->ring_allocation_size = ring_allocation_size;
2329 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2330 rx->ring_dma_ptr = dma_ptr;
2331
2332 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2333 GFP_KERNEL);
2334 if (!cpu_ptr) {
2335 ret = -ENOMEM;
2336 goto cleanup;
2337 }
2338 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2339 dma_ptr = 0;
2340 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2341 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2342 GFP_KERNEL);
2343 if (!cpu_ptr) {
2344 ret = -ENOMEM;
2345 goto cleanup;
2346 }
2347
2348 rx->head_cpu_ptr = cpu_ptr;
2349 rx->head_dma_ptr = dma_ptr;
2350 if (rx->head_dma_ptr & 0x3) {
2351 ret = -ENOMEM;
2352 goto cleanup;
2353 }
2354
2355 rx->last_head = 0;
2356 for (index = 0; index < rx->ring_size; index++) {
2357 struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx);
2358
2359 ret = lan743x_rx_init_ring_element(rx, index, new_skb);
2360 if (ret)
2361 goto cleanup;
2362 }
2363 return 0;
2364
2365 cleanup:
2366 lan743x_rx_ring_cleanup(rx);
2367 return ret;
2368 }
2369
lan743x_rx_close(struct lan743x_rx * rx)2370 static void lan743x_rx_close(struct lan743x_rx *rx)
2371 {
2372 struct lan743x_adapter *adapter = rx->adapter;
2373
2374 lan743x_csr_write(adapter, FCT_RX_CTL,
2375 FCT_RX_CTL_DIS_(rx->channel_number));
2376 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2377 FCT_RX_CTL_EN_(rx->channel_number),
2378 0, 1000, 20000, 100);
2379
2380 lan743x_csr_write(adapter, DMAC_CMD,
2381 DMAC_CMD_STOP_R_(rx->channel_number));
2382 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2383
2384 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2385 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2386 lan743x_csr_write(adapter, INT_EN_CLR,
2387 INT_BIT_DMA_RX_(rx->channel_number));
2388 napi_disable(&rx->napi);
2389
2390 netif_napi_del(&rx->napi);
2391
2392 lan743x_rx_ring_cleanup(rx);
2393 }
2394
lan743x_rx_open(struct lan743x_rx * rx)2395 static int lan743x_rx_open(struct lan743x_rx *rx)
2396 {
2397 struct lan743x_adapter *adapter = rx->adapter;
2398 u32 data = 0;
2399 int ret;
2400
2401 rx->frame_count = 0;
2402 ret = lan743x_rx_ring_init(rx);
2403 if (ret)
2404 goto return_error;
2405
2406 netif_napi_add(adapter->netdev,
2407 &rx->napi, lan743x_rx_napi_poll,
2408 rx->ring_size - 1);
2409
2410 lan743x_csr_write(adapter, DMAC_CMD,
2411 DMAC_CMD_RX_SWR_(rx->channel_number));
2412 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2413 DMAC_CMD_RX_SWR_(rx->channel_number),
2414 0, 1000, 20000, 100);
2415
2416 /* set ring base address */
2417 lan743x_csr_write(adapter,
2418 RX_BASE_ADDRH(rx->channel_number),
2419 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2420 lan743x_csr_write(adapter,
2421 RX_BASE_ADDRL(rx->channel_number),
2422 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2423
2424 /* set rx write back address */
2425 lan743x_csr_write(adapter,
2426 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2427 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2428 lan743x_csr_write(adapter,
2429 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2430 DMA_ADDR_LOW32(rx->head_dma_ptr));
2431 data = RX_CFG_A_RX_HP_WB_EN_;
2432 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2433 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2434 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2435 RX_CFG_A_RX_PF_THRES_SET_(16) |
2436 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2437 }
2438
2439 /* set RX_CFG_A */
2440 lan743x_csr_write(adapter,
2441 RX_CFG_A(rx->channel_number), data);
2442
2443 /* set RX_CFG_B */
2444 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2445 data &= ~RX_CFG_B_RX_PAD_MASK_;
2446 if (!RX_HEAD_PADDING)
2447 data |= RX_CFG_B_RX_PAD_0_;
2448 else
2449 data |= RX_CFG_B_RX_PAD_2_;
2450 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2451 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2452 data |= RX_CFG_B_TS_ALL_RX_;
2453 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2454 data |= RX_CFG_B_RDMABL_512_;
2455
2456 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2457 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2458 INT_BIT_DMA_RX_
2459 (rx->channel_number));
2460
2461 /* set RX_CFG_C */
2462 data = 0;
2463 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2464 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2465 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2466 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2467 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2468 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2469 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2470 data |= RX_CFG_C_RX_INT_EN_R2C_;
2471 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2472
2473 rx->last_tail = ((u32)(rx->ring_size - 1));
2474 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2475 rx->last_tail);
2476 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2477 if (rx->last_head) {
2478 ret = -EIO;
2479 goto napi_delete;
2480 }
2481
2482 napi_enable(&rx->napi);
2483
2484 lan743x_csr_write(adapter, INT_EN_SET,
2485 INT_BIT_DMA_RX_(rx->channel_number));
2486 lan743x_csr_write(adapter, DMAC_INT_STS,
2487 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2488 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2489 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2490 lan743x_csr_write(adapter, DMAC_CMD,
2491 DMAC_CMD_START_R_(rx->channel_number));
2492
2493 /* initialize fifo */
2494 lan743x_csr_write(adapter, FCT_RX_CTL,
2495 FCT_RX_CTL_RESET_(rx->channel_number));
2496 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2497 FCT_RX_CTL_RESET_(rx->channel_number),
2498 0, 1000, 20000, 100);
2499 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2500 FCT_FLOW_CTL_REQ_EN_ |
2501 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2502 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2503
2504 /* enable fifo */
2505 lan743x_csr_write(adapter, FCT_RX_CTL,
2506 FCT_RX_CTL_EN_(rx->channel_number));
2507 return 0;
2508
2509 napi_delete:
2510 netif_napi_del(&rx->napi);
2511 lan743x_rx_ring_cleanup(rx);
2512
2513 return_error:
2514 return ret;
2515 }
2516
lan743x_netdev_close(struct net_device * netdev)2517 static int lan743x_netdev_close(struct net_device *netdev)
2518 {
2519 struct lan743x_adapter *adapter = netdev_priv(netdev);
2520 int index;
2521
2522 lan743x_tx_close(&adapter->tx[0]);
2523
2524 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2525 lan743x_rx_close(&adapter->rx[index]);
2526
2527 lan743x_ptp_close(adapter);
2528
2529 lan743x_phy_close(adapter);
2530
2531 lan743x_mac_close(adapter);
2532
2533 lan743x_intr_close(adapter);
2534
2535 return 0;
2536 }
2537
lan743x_netdev_open(struct net_device * netdev)2538 static int lan743x_netdev_open(struct net_device *netdev)
2539 {
2540 struct lan743x_adapter *adapter = netdev_priv(netdev);
2541 int index;
2542 int ret;
2543
2544 ret = lan743x_intr_open(adapter);
2545 if (ret)
2546 goto return_error;
2547
2548 ret = lan743x_mac_open(adapter);
2549 if (ret)
2550 goto close_intr;
2551
2552 ret = lan743x_phy_open(adapter);
2553 if (ret)
2554 goto close_mac;
2555
2556 ret = lan743x_ptp_open(adapter);
2557 if (ret)
2558 goto close_phy;
2559
2560 lan743x_rfe_open(adapter);
2561
2562 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2563 ret = lan743x_rx_open(&adapter->rx[index]);
2564 if (ret)
2565 goto close_rx;
2566 }
2567
2568 ret = lan743x_tx_open(&adapter->tx[0]);
2569 if (ret)
2570 goto close_rx;
2571
2572 return 0;
2573
2574 close_rx:
2575 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2576 if (adapter->rx[index].ring_cpu_ptr)
2577 lan743x_rx_close(&adapter->rx[index]);
2578 }
2579 lan743x_ptp_close(adapter);
2580
2581 close_phy:
2582 lan743x_phy_close(adapter);
2583
2584 close_mac:
2585 lan743x_mac_close(adapter);
2586
2587 close_intr:
2588 lan743x_intr_close(adapter);
2589
2590 return_error:
2591 netif_warn(adapter, ifup, adapter->netdev,
2592 "Error opening LAN743x\n");
2593 return ret;
2594 }
2595
lan743x_netdev_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2596 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2597 struct net_device *netdev)
2598 {
2599 struct lan743x_adapter *adapter = netdev_priv(netdev);
2600
2601 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2602 }
2603
lan743x_netdev_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)2604 static int lan743x_netdev_ioctl(struct net_device *netdev,
2605 struct ifreq *ifr, int cmd)
2606 {
2607 if (!netif_running(netdev))
2608 return -EINVAL;
2609 if (cmd == SIOCSHWTSTAMP)
2610 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2611 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2612 }
2613
lan743x_netdev_set_multicast(struct net_device * netdev)2614 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2615 {
2616 struct lan743x_adapter *adapter = netdev_priv(netdev);
2617
2618 lan743x_rfe_set_multicast(adapter);
2619 }
2620
lan743x_netdev_change_mtu(struct net_device * netdev,int new_mtu)2621 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2622 {
2623 struct lan743x_adapter *adapter = netdev_priv(netdev);
2624 int ret = 0;
2625
2626 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2627 if (!ret)
2628 netdev->mtu = new_mtu;
2629 return ret;
2630 }
2631
lan743x_netdev_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * stats)2632 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2633 struct rtnl_link_stats64 *stats)
2634 {
2635 struct lan743x_adapter *adapter = netdev_priv(netdev);
2636
2637 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2638 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2639 stats->rx_bytes = lan743x_csr_read(adapter,
2640 STAT_RX_UNICAST_BYTE_COUNT) +
2641 lan743x_csr_read(adapter,
2642 STAT_RX_BROADCAST_BYTE_COUNT) +
2643 lan743x_csr_read(adapter,
2644 STAT_RX_MULTICAST_BYTE_COUNT);
2645 stats->tx_bytes = lan743x_csr_read(adapter,
2646 STAT_TX_UNICAST_BYTE_COUNT) +
2647 lan743x_csr_read(adapter,
2648 STAT_TX_BROADCAST_BYTE_COUNT) +
2649 lan743x_csr_read(adapter,
2650 STAT_TX_MULTICAST_BYTE_COUNT);
2651 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2652 lan743x_csr_read(adapter,
2653 STAT_RX_ALIGNMENT_ERRORS) +
2654 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2655 lan743x_csr_read(adapter,
2656 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2657 lan743x_csr_read(adapter,
2658 STAT_RX_OVERSIZE_FRAME_ERRORS);
2659 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2660 lan743x_csr_read(adapter,
2661 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2662 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2663 stats->rx_dropped = lan743x_csr_read(adapter,
2664 STAT_RX_DROPPED_FRAMES);
2665 stats->tx_dropped = lan743x_csr_read(adapter,
2666 STAT_TX_EXCESSIVE_COLLISION);
2667 stats->multicast = lan743x_csr_read(adapter,
2668 STAT_RX_MULTICAST_FRAMES) +
2669 lan743x_csr_read(adapter,
2670 STAT_TX_MULTICAST_FRAMES);
2671 stats->collisions = lan743x_csr_read(adapter,
2672 STAT_TX_SINGLE_COLLISIONS) +
2673 lan743x_csr_read(adapter,
2674 STAT_TX_MULTIPLE_COLLISIONS) +
2675 lan743x_csr_read(adapter,
2676 STAT_TX_LATE_COLLISIONS);
2677 }
2678
lan743x_netdev_set_mac_address(struct net_device * netdev,void * addr)2679 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2680 void *addr)
2681 {
2682 struct lan743x_adapter *adapter = netdev_priv(netdev);
2683 struct sockaddr *sock_addr = addr;
2684 int ret;
2685
2686 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2687 if (ret)
2688 return ret;
2689 ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
2690 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2691 lan743x_rfe_update_mac_address(adapter);
2692 return 0;
2693 }
2694
2695 static const struct net_device_ops lan743x_netdev_ops = {
2696 .ndo_open = lan743x_netdev_open,
2697 .ndo_stop = lan743x_netdev_close,
2698 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2699 .ndo_do_ioctl = lan743x_netdev_ioctl,
2700 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2701 .ndo_change_mtu = lan743x_netdev_change_mtu,
2702 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2703 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2704 };
2705
lan743x_hardware_cleanup(struct lan743x_adapter * adapter)2706 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2707 {
2708 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2709 }
2710
lan743x_mdiobus_cleanup(struct lan743x_adapter * adapter)2711 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2712 {
2713 mdiobus_unregister(adapter->mdiobus);
2714 }
2715
lan743x_full_cleanup(struct lan743x_adapter * adapter)2716 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2717 {
2718 unregister_netdev(adapter->netdev);
2719
2720 lan743x_mdiobus_cleanup(adapter);
2721 lan743x_hardware_cleanup(adapter);
2722 lan743x_pci_cleanup(adapter);
2723 }
2724
lan743x_hardware_init(struct lan743x_adapter * adapter,struct pci_dev * pdev)2725 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2726 struct pci_dev *pdev)
2727 {
2728 struct lan743x_tx *tx;
2729 int index;
2730 int ret;
2731
2732 adapter->intr.irq = adapter->pdev->irq;
2733 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2734
2735 ret = lan743x_gpio_init(adapter);
2736 if (ret)
2737 return ret;
2738
2739 ret = lan743x_mac_init(adapter);
2740 if (ret)
2741 return ret;
2742
2743 ret = lan743x_phy_init(adapter);
2744 if (ret)
2745 return ret;
2746
2747 ret = lan743x_ptp_init(adapter);
2748 if (ret)
2749 return ret;
2750
2751 lan743x_rfe_update_mac_address(adapter);
2752
2753 ret = lan743x_dmac_init(adapter);
2754 if (ret)
2755 return ret;
2756
2757 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2758 adapter->rx[index].adapter = adapter;
2759 adapter->rx[index].channel_number = index;
2760 }
2761
2762 tx = &adapter->tx[0];
2763 tx->adapter = adapter;
2764 tx->channel_number = 0;
2765 spin_lock_init(&tx->ring_lock);
2766 return 0;
2767 }
2768
lan743x_mdiobus_init(struct lan743x_adapter * adapter)2769 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2770 {
2771 int ret;
2772
2773 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2774 if (!(adapter->mdiobus)) {
2775 ret = -ENOMEM;
2776 goto return_error;
2777 }
2778
2779 adapter->mdiobus->priv = (void *)adapter;
2780 adapter->mdiobus->read = lan743x_mdiobus_read;
2781 adapter->mdiobus->write = lan743x_mdiobus_write;
2782 adapter->mdiobus->name = "lan743x-mdiobus";
2783 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2784 "pci-%s", pci_name(adapter->pdev));
2785
2786 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2787 /* LAN7430 uses internal phy at address 1 */
2788 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2789
2790 /* register mdiobus */
2791 ret = mdiobus_register(adapter->mdiobus);
2792 if (ret < 0)
2793 goto return_error;
2794 return 0;
2795
2796 return_error:
2797 return ret;
2798 }
2799
2800 /* lan743x_pcidev_probe - Device Initialization Routine
2801 * @pdev: PCI device information struct
2802 * @id: entry in lan743x_pci_tbl
2803 *
2804 * Returns 0 on success, negative on failure
2805 *
2806 * initializes an adapter identified by a pci_dev structure.
2807 * The OS initialization, configuring of the adapter private structure,
2808 * and a hardware reset occur.
2809 **/
lan743x_pcidev_probe(struct pci_dev * pdev,const struct pci_device_id * id)2810 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2811 const struct pci_device_id *id)
2812 {
2813 struct lan743x_adapter *adapter = NULL;
2814 struct net_device *netdev = NULL;
2815 const void *mac_addr;
2816 int ret = -ENODEV;
2817
2818 netdev = devm_alloc_etherdev(&pdev->dev,
2819 sizeof(struct lan743x_adapter));
2820 if (!netdev)
2821 goto return_error;
2822
2823 SET_NETDEV_DEV(netdev, &pdev->dev);
2824 pci_set_drvdata(pdev, netdev);
2825 adapter = netdev_priv(netdev);
2826 adapter->netdev = netdev;
2827 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2828 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2829 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2830 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2831
2832 mac_addr = of_get_mac_address(pdev->dev.of_node);
2833 if (!IS_ERR(mac_addr))
2834 ether_addr_copy(adapter->mac_address, mac_addr);
2835
2836 ret = lan743x_pci_init(adapter, pdev);
2837 if (ret)
2838 goto return_error;
2839
2840 ret = lan743x_csr_init(adapter);
2841 if (ret)
2842 goto cleanup_pci;
2843
2844 ret = lan743x_hardware_init(adapter, pdev);
2845 if (ret)
2846 goto cleanup_pci;
2847
2848 ret = lan743x_mdiobus_init(adapter);
2849 if (ret)
2850 goto cleanup_hardware;
2851
2852 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2853 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2854 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2855 adapter->netdev->hw_features = adapter->netdev->features;
2856
2857 /* carrier off reporting is important to ethtool even BEFORE open */
2858 netif_carrier_off(netdev);
2859
2860 ret = register_netdev(adapter->netdev);
2861 if (ret < 0)
2862 goto cleanup_mdiobus;
2863 return 0;
2864
2865 cleanup_mdiobus:
2866 lan743x_mdiobus_cleanup(adapter);
2867
2868 cleanup_hardware:
2869 lan743x_hardware_cleanup(adapter);
2870
2871 cleanup_pci:
2872 lan743x_pci_cleanup(adapter);
2873
2874 return_error:
2875 pr_warn("Initialization failed\n");
2876 return ret;
2877 }
2878
2879 /**
2880 * lan743x_pcidev_remove - Device Removal Routine
2881 * @pdev: PCI device information struct
2882 *
2883 * this is called by the PCI subsystem to alert the driver
2884 * that it should release a PCI device. This could be caused by a
2885 * Hot-Plug event, or because the driver is going to be removed from
2886 * memory.
2887 **/
lan743x_pcidev_remove(struct pci_dev * pdev)2888 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2889 {
2890 struct net_device *netdev = pci_get_drvdata(pdev);
2891 struct lan743x_adapter *adapter = netdev_priv(netdev);
2892
2893 lan743x_full_cleanup(adapter);
2894 }
2895
lan743x_pcidev_shutdown(struct pci_dev * pdev)2896 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2897 {
2898 struct net_device *netdev = pci_get_drvdata(pdev);
2899 struct lan743x_adapter *adapter = netdev_priv(netdev);
2900
2901 rtnl_lock();
2902 netif_device_detach(netdev);
2903
2904 /* close netdev when netdev is at running state.
2905 * For instance, it is true when system goes to sleep by pm-suspend
2906 * However, it is false when system goes to sleep by suspend GUI menu
2907 */
2908 if (netif_running(netdev))
2909 lan743x_netdev_close(netdev);
2910 rtnl_unlock();
2911
2912 #ifdef CONFIG_PM
2913 pci_save_state(pdev);
2914 #endif
2915
2916 /* clean up lan743x portion */
2917 lan743x_hardware_cleanup(adapter);
2918 }
2919
2920 #ifdef CONFIG_PM_SLEEP
lan743x_pm_wakeframe_crc16(const u8 * buf,int len)2921 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2922 {
2923 return bitrev16(crc16(0xFFFF, buf, len));
2924 }
2925
lan743x_pm_set_wol(struct lan743x_adapter * adapter)2926 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2927 {
2928 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2929 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2930 const u8 arp_type[2] = { 0x08, 0x06 };
2931 int mask_index;
2932 u32 pmtctl;
2933 u32 wucsr;
2934 u32 macrx;
2935 u16 crc;
2936
2937 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2938 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2939
2940 /* clear wake settings */
2941 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2942 pmtctl |= PMT_CTL_WUPS_MASK_;
2943 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2944 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2945 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2946
2947 macrx = lan743x_csr_read(adapter, MAC_RX);
2948
2949 wucsr = 0;
2950 mask_index = 0;
2951
2952 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2953
2954 if (adapter->wolopts & WAKE_PHY) {
2955 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2956 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2957 }
2958 if (adapter->wolopts & WAKE_MAGIC) {
2959 wucsr |= MAC_WUCSR_MPEN_;
2960 macrx |= MAC_RX_RXEN_;
2961 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2962 }
2963 if (adapter->wolopts & WAKE_UCAST) {
2964 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2965 macrx |= MAC_RX_RXEN_;
2966 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2967 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2968 }
2969 if (adapter->wolopts & WAKE_BCAST) {
2970 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2971 macrx |= MAC_RX_RXEN_;
2972 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2973 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2974 }
2975 if (adapter->wolopts & WAKE_MCAST) {
2976 /* IPv4 multicast */
2977 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2978 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2979 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2980 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2981 (crc & MAC_WUF_CFG_CRC16_MASK_));
2982 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2983 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2984 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2985 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2986 mask_index++;
2987
2988 /* IPv6 multicast */
2989 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2990 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2991 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2992 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2993 (crc & MAC_WUF_CFG_CRC16_MASK_));
2994 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2995 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2996 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2997 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2998 mask_index++;
2999
3000 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3001 macrx |= MAC_RX_RXEN_;
3002 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3003 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3004 }
3005 if (adapter->wolopts & WAKE_ARP) {
3006 /* set MAC_WUF_CFG & WUF_MASK
3007 * for packettype (offset 12,13) = ARP (0x0806)
3008 */
3009 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
3010 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3011 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
3012 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3013 (crc & MAC_WUF_CFG_CRC16_MASK_));
3014 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
3015 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3016 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3017 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3018 mask_index++;
3019
3020 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3021 macrx |= MAC_RX_RXEN_;
3022 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3023 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3024 }
3025
3026 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3027 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3028 lan743x_csr_write(adapter, MAC_RX, macrx);
3029 }
3030
lan743x_pm_suspend(struct device * dev)3031 static int lan743x_pm_suspend(struct device *dev)
3032 {
3033 struct pci_dev *pdev = to_pci_dev(dev);
3034 struct net_device *netdev = pci_get_drvdata(pdev);
3035 struct lan743x_adapter *adapter = netdev_priv(netdev);
3036
3037 lan743x_pcidev_shutdown(pdev);
3038
3039 /* clear all wakes */
3040 lan743x_csr_write(adapter, MAC_WUCSR, 0);
3041 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3042 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3043
3044 if (adapter->wolopts)
3045 lan743x_pm_set_wol(adapter);
3046
3047 /* Host sets PME_En, put D3hot */
3048 return pci_prepare_to_sleep(pdev);;
3049 }
3050
lan743x_pm_resume(struct device * dev)3051 static int lan743x_pm_resume(struct device *dev)
3052 {
3053 struct pci_dev *pdev = to_pci_dev(dev);
3054 struct net_device *netdev = pci_get_drvdata(pdev);
3055 struct lan743x_adapter *adapter = netdev_priv(netdev);
3056 int ret;
3057
3058 pci_set_power_state(pdev, PCI_D0);
3059 pci_restore_state(pdev);
3060 pci_save_state(pdev);
3061
3062 ret = lan743x_hardware_init(adapter, pdev);
3063 if (ret) {
3064 netif_err(adapter, probe, adapter->netdev,
3065 "lan743x_hardware_init returned %d\n", ret);
3066 }
3067
3068 /* open netdev when netdev is at running state while resume.
3069 * For instance, it is true when system wakesup after pm-suspend
3070 * However, it is false when system wakes up after suspend GUI menu
3071 */
3072 if (netif_running(netdev))
3073 lan743x_netdev_open(netdev);
3074
3075 netif_device_attach(netdev);
3076
3077 return 0;
3078 }
3079
3080 static const struct dev_pm_ops lan743x_pm_ops = {
3081 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3082 };
3083 #endif /* CONFIG_PM_SLEEP */
3084
3085 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3086 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3087 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3088 { 0, }
3089 };
3090
3091 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3092
3093 static struct pci_driver lan743x_pcidev_driver = {
3094 .name = DRIVER_NAME,
3095 .id_table = lan743x_pcidev_tbl,
3096 .probe = lan743x_pcidev_probe,
3097 .remove = lan743x_pcidev_remove,
3098 #ifdef CONFIG_PM_SLEEP
3099 .driver.pm = &lan743x_pm_ops,
3100 #endif
3101 .shutdown = lan743x_pcidev_shutdown,
3102 };
3103
3104 module_pci_driver(lan743x_pcidev_driver);
3105
3106 MODULE_AUTHOR(DRIVER_AUTHOR);
3107 MODULE_DESCRIPTION(DRIVER_DESC);
3108 MODULE_LICENSE("GPL");
3109