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(struct lan743x_adapter * adapter)143 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter)
144 {
145 struct lan743x_intr *intr = &adapter->intr;
146
147 /* disable the interrupt to prevent repeated re-triggering */
148 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
149 intr->software_isr_flag = true;
150 wake_up(&intr->software_isr_wq);
151 }
152
lan743x_tx_isr(void * context,u32 int_sts,u32 flags)153 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
154 {
155 struct lan743x_tx *tx = context;
156 struct lan743x_adapter *adapter = tx->adapter;
157 bool enable_flag = true;
158
159 lan743x_csr_read(adapter, INT_EN_SET);
160 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
161 lan743x_csr_write(adapter, INT_EN_CLR,
162 INT_BIT_DMA_TX_(tx->channel_number));
163 }
164
165 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
166 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
167 u32 dmac_int_sts;
168 u32 dmac_int_en;
169
170 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
171 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
172 else
173 dmac_int_sts = ioc_bit;
174 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
175 dmac_int_en = lan743x_csr_read(adapter,
176 DMAC_INT_EN_SET);
177 else
178 dmac_int_en = ioc_bit;
179
180 dmac_int_en &= ioc_bit;
181 dmac_int_sts &= dmac_int_en;
182 if (dmac_int_sts & ioc_bit) {
183 napi_schedule(&tx->napi);
184 enable_flag = false;/* poll func will enable later */
185 }
186 }
187
188 if (enable_flag)
189 /* enable isr */
190 lan743x_csr_write(adapter, INT_EN_SET,
191 INT_BIT_DMA_TX_(tx->channel_number));
192 }
193
lan743x_rx_isr(void * context,u32 int_sts,u32 flags)194 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
195 {
196 struct lan743x_rx *rx = context;
197 struct lan743x_adapter *adapter = rx->adapter;
198 bool enable_flag = true;
199
200 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
201 lan743x_csr_write(adapter, INT_EN_CLR,
202 INT_BIT_DMA_RX_(rx->channel_number));
203 }
204
205 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
206 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
207 u32 dmac_int_sts;
208 u32 dmac_int_en;
209
210 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
211 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
212 else
213 dmac_int_sts = rx_frame_bit;
214 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
215 dmac_int_en = lan743x_csr_read(adapter,
216 DMAC_INT_EN_SET);
217 else
218 dmac_int_en = rx_frame_bit;
219
220 dmac_int_en &= rx_frame_bit;
221 dmac_int_sts &= dmac_int_en;
222 if (dmac_int_sts & rx_frame_bit) {
223 napi_schedule(&rx->napi);
224 enable_flag = false;/* poll funct will enable later */
225 }
226 }
227
228 if (enable_flag) {
229 /* enable isr */
230 lan743x_csr_write(adapter, INT_EN_SET,
231 INT_BIT_DMA_RX_(rx->channel_number));
232 }
233 }
234
lan743x_intr_shared_isr(void * context,u32 int_sts,u32 flags)235 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
236 {
237 struct lan743x_adapter *adapter = context;
238 unsigned int channel;
239
240 if (int_sts & INT_BIT_ALL_RX_) {
241 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
242 channel++) {
243 u32 int_bit = INT_BIT_DMA_RX_(channel);
244
245 if (int_sts & int_bit) {
246 lan743x_rx_isr(&adapter->rx[channel],
247 int_bit, flags);
248 int_sts &= ~int_bit;
249 }
250 }
251 }
252 if (int_sts & INT_BIT_ALL_TX_) {
253 for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
254 channel++) {
255 u32 int_bit = INT_BIT_DMA_TX_(channel);
256
257 if (int_sts & int_bit) {
258 lan743x_tx_isr(&adapter->tx[channel],
259 int_bit, flags);
260 int_sts &= ~int_bit;
261 }
262 }
263 }
264 if (int_sts & INT_BIT_ALL_OTHER_) {
265 if (int_sts & INT_BIT_SW_GP_) {
266 lan743x_intr_software_isr(adapter);
267 int_sts &= ~INT_BIT_SW_GP_;
268 }
269 if (int_sts & INT_BIT_1588_) {
270 lan743x_ptp_isr(adapter);
271 int_sts &= ~INT_BIT_1588_;
272 }
273 }
274 if (int_sts)
275 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
276 }
277
lan743x_intr_entry_isr(int irq,void * ptr)278 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
279 {
280 struct lan743x_vector *vector = ptr;
281 struct lan743x_adapter *adapter = vector->adapter;
282 irqreturn_t result = IRQ_NONE;
283 u32 int_enables;
284 u32 int_sts;
285
286 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
287 int_sts = lan743x_csr_read(adapter, INT_STS);
288 } else if (vector->flags &
289 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
290 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
291 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
292 } else {
293 /* use mask as implied status */
294 int_sts = vector->int_mask | INT_BIT_MAS_;
295 }
296
297 if (!(int_sts & INT_BIT_MAS_))
298 goto irq_done;
299
300 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
301 /* disable vector interrupt */
302 lan743x_csr_write(adapter,
303 INT_VEC_EN_CLR,
304 INT_VEC_EN_(vector->vector_index));
305
306 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
307 /* disable master interrupt */
308 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
309
310 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
311 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
312 } else {
313 /* use vector mask as implied enable mask */
314 int_enables = vector->int_mask;
315 }
316
317 int_sts &= int_enables;
318 int_sts &= vector->int_mask;
319 if (int_sts) {
320 if (vector->handler) {
321 vector->handler(vector->context,
322 int_sts, vector->flags);
323 } else {
324 /* disable interrupts on this vector */
325 lan743x_csr_write(adapter, INT_EN_CLR,
326 vector->int_mask);
327 }
328 result = IRQ_HANDLED;
329 }
330
331 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
332 /* enable master interrupt */
333 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
334
335 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
336 /* enable vector interrupt */
337 lan743x_csr_write(adapter,
338 INT_VEC_EN_SET,
339 INT_VEC_EN_(vector->vector_index));
340 irq_done:
341 return result;
342 }
343
lan743x_intr_test_isr(struct lan743x_adapter * adapter)344 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
345 {
346 struct lan743x_intr *intr = &adapter->intr;
347 int ret;
348
349 intr->software_isr_flag = false;
350
351 /* enable and activate test interrupt */
352 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
353 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
354
355 ret = wait_event_timeout(intr->software_isr_wq,
356 intr->software_isr_flag,
357 msecs_to_jiffies(200));
358
359 /* disable test interrupt */
360 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
361
362 return ret > 0 ? 0 : -ENODEV;
363 }
364
lan743x_intr_register_isr(struct lan743x_adapter * adapter,int vector_index,u32 flags,u32 int_mask,lan743x_vector_handler handler,void * context)365 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
366 int vector_index, u32 flags,
367 u32 int_mask,
368 lan743x_vector_handler handler,
369 void *context)
370 {
371 struct lan743x_vector *vector = &adapter->intr.vector_list
372 [vector_index];
373 int ret;
374
375 vector->adapter = adapter;
376 vector->flags = flags;
377 vector->vector_index = vector_index;
378 vector->int_mask = int_mask;
379 vector->handler = handler;
380 vector->context = context;
381
382 ret = request_irq(vector->irq,
383 lan743x_intr_entry_isr,
384 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
385 IRQF_SHARED : 0, DRIVER_NAME, vector);
386 if (ret) {
387 vector->handler = NULL;
388 vector->context = NULL;
389 vector->int_mask = 0;
390 vector->flags = 0;
391 }
392 return ret;
393 }
394
lan743x_intr_unregister_isr(struct lan743x_adapter * adapter,int vector_index)395 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
396 int vector_index)
397 {
398 struct lan743x_vector *vector = &adapter->intr.vector_list
399 [vector_index];
400
401 free_irq(vector->irq, vector);
402 vector->handler = NULL;
403 vector->context = NULL;
404 vector->int_mask = 0;
405 vector->flags = 0;
406 }
407
lan743x_intr_get_vector_flags(struct lan743x_adapter * adapter,u32 int_mask)408 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
409 u32 int_mask)
410 {
411 int index;
412
413 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
414 if (adapter->intr.vector_list[index].int_mask & int_mask)
415 return adapter->intr.vector_list[index].flags;
416 }
417 return 0;
418 }
419
lan743x_intr_close(struct lan743x_adapter * adapter)420 static void lan743x_intr_close(struct lan743x_adapter *adapter)
421 {
422 struct lan743x_intr *intr = &adapter->intr;
423 int index = 0;
424
425 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
426 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
427
428 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
429 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
430 lan743x_intr_unregister_isr(adapter, index);
431 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
432 }
433 }
434
435 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
436 pci_disable_msi(adapter->pdev);
437 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
438 }
439
440 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
441 pci_disable_msix(adapter->pdev);
442 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
443 }
444 }
445
lan743x_intr_open(struct lan743x_adapter * adapter)446 static int lan743x_intr_open(struct lan743x_adapter *adapter)
447 {
448 struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
449 struct lan743x_intr *intr = &adapter->intr;
450 u32 int_vec_en_auto_clr = 0;
451 u32 int_vec_map0 = 0;
452 u32 int_vec_map1 = 0;
453 int ret = -ENODEV;
454 int index = 0;
455 u32 flags = 0;
456
457 intr->number_of_vectors = 0;
458
459 /* Try to set up MSIX interrupts */
460 memset(&msix_entries[0], 0,
461 sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
462 for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
463 msix_entries[index].entry = index;
464 ret = pci_enable_msix_range(adapter->pdev,
465 msix_entries, 1,
466 1 + LAN743X_USED_TX_CHANNELS +
467 LAN743X_USED_RX_CHANNELS);
468
469 if (ret > 0) {
470 intr->flags |= INTR_FLAG_MSIX_ENABLED;
471 intr->number_of_vectors = ret;
472 intr->using_vectors = true;
473 for (index = 0; index < intr->number_of_vectors; index++)
474 intr->vector_list[index].irq = msix_entries
475 [index].vector;
476 netif_info(adapter, ifup, adapter->netdev,
477 "using MSIX interrupts, number of vectors = %d\n",
478 intr->number_of_vectors);
479 }
480
481 /* If MSIX failed try to setup using MSI interrupts */
482 if (!intr->number_of_vectors) {
483 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
484 if (!pci_enable_msi(adapter->pdev)) {
485 intr->flags |= INTR_FLAG_MSI_ENABLED;
486 intr->number_of_vectors = 1;
487 intr->using_vectors = true;
488 intr->vector_list[0].irq =
489 adapter->pdev->irq;
490 netif_info(adapter, ifup, adapter->netdev,
491 "using MSI interrupts, number of vectors = %d\n",
492 intr->number_of_vectors);
493 }
494 }
495 }
496
497 /* If MSIX, and MSI failed, setup using legacy interrupt */
498 if (!intr->number_of_vectors) {
499 intr->number_of_vectors = 1;
500 intr->using_vectors = false;
501 intr->vector_list[0].irq = intr->irq;
502 netif_info(adapter, ifup, adapter->netdev,
503 "using legacy interrupts\n");
504 }
505
506 /* At this point we must have at least one irq */
507 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
508
509 /* map all interrupts to vector 0 */
510 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
511 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
512 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
513 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
514 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
515 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
516 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
517
518 if (intr->using_vectors) {
519 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
520 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
521 } else {
522 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
523 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
524 LAN743X_VECTOR_FLAG_IRQ_SHARED;
525 }
526
527 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
528 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
529 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
530 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
531 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
532 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
533 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
534 }
535
536 init_waitqueue_head(&intr->software_isr_wq);
537
538 ret = lan743x_intr_register_isr(adapter, 0, flags,
539 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
540 INT_BIT_ALL_OTHER_,
541 lan743x_intr_shared_isr, adapter);
542 if (ret)
543 goto clean_up;
544 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
545
546 if (intr->using_vectors)
547 lan743x_csr_write(adapter, INT_VEC_EN_SET,
548 INT_VEC_EN_(0));
549
550 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
551 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
552 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
553 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
554 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
555 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
556 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
557 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
558 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
559 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
560 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
561 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
562 }
563
564 /* enable interrupts */
565 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
566 ret = lan743x_intr_test_isr(adapter);
567 if (ret)
568 goto clean_up;
569
570 if (intr->number_of_vectors > 1) {
571 int number_of_tx_vectors = intr->number_of_vectors - 1;
572
573 if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
574 number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
575 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
576 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
577 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
578 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
579 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
580 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
581
582 if (adapter->csr.flags &
583 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
584 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
585 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
586 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
587 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
588 }
589
590 for (index = 0; index < number_of_tx_vectors; index++) {
591 u32 int_bit = INT_BIT_DMA_TX_(index);
592 int vector = index + 1;
593
594 /* map TX interrupt to vector */
595 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
596 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
597
598 /* Remove TX interrupt from shared mask */
599 intr->vector_list[0].int_mask &= ~int_bit;
600 ret = lan743x_intr_register_isr(adapter, vector, flags,
601 int_bit, lan743x_tx_isr,
602 &adapter->tx[index]);
603 if (ret)
604 goto clean_up;
605 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
606 if (!(flags &
607 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
608 lan743x_csr_write(adapter, INT_VEC_EN_SET,
609 INT_VEC_EN_(vector));
610 }
611 }
612 if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
613 int number_of_rx_vectors = intr->number_of_vectors -
614 LAN743X_USED_TX_CHANNELS - 1;
615
616 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
617 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
618
619 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
620 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
621 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
622 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
623 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
624 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
625
626 if (adapter->csr.flags &
627 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
628 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
629 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
630 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
631 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
632 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
633 }
634 for (index = 0; index < number_of_rx_vectors; index++) {
635 int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
636 u32 int_bit = INT_BIT_DMA_RX_(index);
637
638 /* map RX interrupt to vector */
639 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
640 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
641 if (flags &
642 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
643 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
644 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
645 int_vec_en_auto_clr);
646 }
647
648 /* Remove RX interrupt from shared mask */
649 intr->vector_list[0].int_mask &= ~int_bit;
650 ret = lan743x_intr_register_isr(adapter, vector, flags,
651 int_bit, lan743x_rx_isr,
652 &adapter->rx[index]);
653 if (ret)
654 goto clean_up;
655 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
656
657 lan743x_csr_write(adapter, INT_VEC_EN_SET,
658 INT_VEC_EN_(vector));
659 }
660 }
661 return 0;
662
663 clean_up:
664 lan743x_intr_close(adapter);
665 return ret;
666 }
667
lan743x_dp_write(struct lan743x_adapter * adapter,u32 select,u32 addr,u32 length,u32 * buf)668 static int lan743x_dp_write(struct lan743x_adapter *adapter,
669 u32 select, u32 addr, u32 length, u32 *buf)
670 {
671 u32 dp_sel;
672 int i;
673
674 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
675 1, 40, 100, 100))
676 return -EIO;
677 dp_sel = lan743x_csr_read(adapter, DP_SEL);
678 dp_sel &= ~DP_SEL_MASK_;
679 dp_sel |= select;
680 lan743x_csr_write(adapter, DP_SEL, dp_sel);
681
682 for (i = 0; i < length; i++) {
683 lan743x_csr_write(adapter, DP_ADDR, addr + i);
684 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
685 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
686 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
687 1, 40, 100, 100))
688 return -EIO;
689 }
690
691 return 0;
692 }
693
lan743x_mac_mii_access(u16 id,u16 index,int read)694 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
695 {
696 u32 ret;
697
698 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
699 MAC_MII_ACC_PHY_ADDR_MASK_;
700 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
701 MAC_MII_ACC_MIIRINDA_MASK_;
702
703 if (read)
704 ret |= MAC_MII_ACC_MII_READ_;
705 else
706 ret |= MAC_MII_ACC_MII_WRITE_;
707 ret |= MAC_MII_ACC_MII_BUSY_;
708
709 return ret;
710 }
711
lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter * adapter)712 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
713 {
714 u32 data;
715
716 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
717 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
718 }
719
lan743x_mdiobus_read(struct mii_bus * bus,int phy_id,int index)720 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
721 {
722 struct lan743x_adapter *adapter = bus->priv;
723 u32 val, mii_access;
724 int ret;
725
726 /* comfirm MII not busy */
727 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
728 if (ret < 0)
729 return ret;
730
731 /* set the address, index & direction (read from PHY) */
732 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
733 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
734 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
735 if (ret < 0)
736 return ret;
737
738 val = lan743x_csr_read(adapter, MAC_MII_DATA);
739 return (int)(val & 0xFFFF);
740 }
741
lan743x_mdiobus_write(struct mii_bus * bus,int phy_id,int index,u16 regval)742 static int lan743x_mdiobus_write(struct mii_bus *bus,
743 int phy_id, int index, u16 regval)
744 {
745 struct lan743x_adapter *adapter = bus->priv;
746 u32 val, mii_access;
747 int ret;
748
749 /* confirm MII not busy */
750 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
751 if (ret < 0)
752 return ret;
753 val = (u32)regval;
754 lan743x_csr_write(adapter, MAC_MII_DATA, val);
755
756 /* set the address, index & direction (write to PHY) */
757 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
758 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
759 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
760 return ret;
761 }
762
lan743x_mac_set_address(struct lan743x_adapter * adapter,u8 * addr)763 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
764 u8 *addr)
765 {
766 u32 addr_lo, addr_hi;
767
768 addr_lo = addr[0] |
769 addr[1] << 8 |
770 addr[2] << 16 |
771 addr[3] << 24;
772 addr_hi = addr[4] |
773 addr[5] << 8;
774 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
775 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
776
777 ether_addr_copy(adapter->mac_address, addr);
778 netif_info(adapter, drv, adapter->netdev,
779 "MAC address set to %pM\n", addr);
780 }
781
lan743x_mac_init(struct lan743x_adapter * adapter)782 static int lan743x_mac_init(struct lan743x_adapter *adapter)
783 {
784 bool mac_address_valid = true;
785 struct net_device *netdev;
786 u32 mac_addr_hi = 0;
787 u32 mac_addr_lo = 0;
788 u32 data;
789
790 netdev = adapter->netdev;
791
792 /* disable auto duplex, and speed detection. Phylib does that */
793 data = lan743x_csr_read(adapter, MAC_CR);
794 data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
795 data |= MAC_CR_CNTR_RST_;
796 lan743x_csr_write(adapter, MAC_CR, data);
797
798 if (!is_valid_ether_addr(adapter->mac_address)) {
799 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
800 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
801 adapter->mac_address[0] = mac_addr_lo & 0xFF;
802 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
803 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
804 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
805 adapter->mac_address[4] = mac_addr_hi & 0xFF;
806 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
807
808 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
809 mac_addr_lo == 0xFFFFFFFF) {
810 mac_address_valid = false;
811 } else if (!is_valid_ether_addr(adapter->mac_address)) {
812 mac_address_valid = false;
813 }
814
815 if (!mac_address_valid)
816 eth_random_addr(adapter->mac_address);
817 }
818 lan743x_mac_set_address(adapter, adapter->mac_address);
819 eth_hw_addr_set(netdev, adapter->mac_address);
820
821 return 0;
822 }
823
lan743x_mac_open(struct lan743x_adapter * adapter)824 static int lan743x_mac_open(struct lan743x_adapter *adapter)
825 {
826 u32 temp;
827
828 temp = lan743x_csr_read(adapter, MAC_RX);
829 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
830 temp = lan743x_csr_read(adapter, MAC_TX);
831 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
832 return 0;
833 }
834
lan743x_mac_close(struct lan743x_adapter * adapter)835 static void lan743x_mac_close(struct lan743x_adapter *adapter)
836 {
837 u32 temp;
838
839 temp = lan743x_csr_read(adapter, MAC_TX);
840 temp &= ~MAC_TX_TXEN_;
841 lan743x_csr_write(adapter, MAC_TX, temp);
842 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
843 1, 1000, 20000, 100);
844
845 temp = lan743x_csr_read(adapter, MAC_RX);
846 temp &= ~MAC_RX_RXEN_;
847 lan743x_csr_write(adapter, MAC_RX, temp);
848 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
849 1, 1000, 20000, 100);
850 }
851
lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter * adapter,bool tx_enable,bool rx_enable)852 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
853 bool tx_enable, bool rx_enable)
854 {
855 u32 flow_setting = 0;
856
857 /* set maximum pause time because when fifo space frees
858 * up a zero value pause frame will be sent to release the pause
859 */
860 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
861 if (tx_enable)
862 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
863 if (rx_enable)
864 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
865 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
866 }
867
lan743x_mac_set_mtu(struct lan743x_adapter * adapter,int new_mtu)868 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
869 {
870 int enabled = 0;
871 u32 mac_rx = 0;
872
873 mac_rx = lan743x_csr_read(adapter, MAC_RX);
874 if (mac_rx & MAC_RX_RXEN_) {
875 enabled = 1;
876 if (mac_rx & MAC_RX_RXD_) {
877 lan743x_csr_write(adapter, MAC_RX, mac_rx);
878 mac_rx &= ~MAC_RX_RXD_;
879 }
880 mac_rx &= ~MAC_RX_RXEN_;
881 lan743x_csr_write(adapter, MAC_RX, mac_rx);
882 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
883 1, 1000, 20000, 100);
884 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
885 }
886
887 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
888 mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN)
889 << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
890 lan743x_csr_write(adapter, MAC_RX, mac_rx);
891
892 if (enabled) {
893 mac_rx |= MAC_RX_RXEN_;
894 lan743x_csr_write(adapter, MAC_RX, mac_rx);
895 }
896 return 0;
897 }
898
899 /* PHY */
lan743x_phy_reset(struct lan743x_adapter * adapter)900 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
901 {
902 u32 data;
903
904 /* Only called with in probe, and before mdiobus_register */
905
906 data = lan743x_csr_read(adapter, PMT_CTL);
907 data |= PMT_CTL_ETH_PHY_RST_;
908 lan743x_csr_write(adapter, PMT_CTL, data);
909
910 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
911 (!(data & PMT_CTL_ETH_PHY_RST_) &&
912 (data & PMT_CTL_READY_)),
913 50000, 1000000);
914 }
915
lan743x_phy_update_flowcontrol(struct lan743x_adapter * adapter,u16 local_adv,u16 remote_adv)916 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
917 u16 local_adv, u16 remote_adv)
918 {
919 struct lan743x_phy *phy = &adapter->phy;
920 u8 cap;
921
922 if (phy->fc_autoneg)
923 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
924 else
925 cap = phy->fc_request_control;
926
927 lan743x_mac_flow_ctrl_set_enables(adapter,
928 cap & FLOW_CTRL_TX,
929 cap & FLOW_CTRL_RX);
930 }
931
lan743x_phy_init(struct lan743x_adapter * adapter)932 static int lan743x_phy_init(struct lan743x_adapter *adapter)
933 {
934 return lan743x_phy_reset(adapter);
935 }
936
lan743x_phy_link_status_change(struct net_device * netdev)937 static void lan743x_phy_link_status_change(struct net_device *netdev)
938 {
939 struct lan743x_adapter *adapter = netdev_priv(netdev);
940 struct phy_device *phydev = netdev->phydev;
941 u32 data;
942
943 phy_print_status(phydev);
944 if (phydev->state == PHY_RUNNING) {
945 int remote_advertisement = 0;
946 int local_advertisement = 0;
947
948 data = lan743x_csr_read(adapter, MAC_CR);
949
950 /* set interface mode */
951 if (phy_interface_is_rgmii(phydev))
952 /* RGMII */
953 data &= ~MAC_CR_MII_EN_;
954 else
955 /* GMII */
956 data |= MAC_CR_MII_EN_;
957
958 /* set duplex mode */
959 if (phydev->duplex)
960 data |= MAC_CR_DPX_;
961 else
962 data &= ~MAC_CR_DPX_;
963
964 /* set bus speed */
965 switch (phydev->speed) {
966 case SPEED_10:
967 data &= ~MAC_CR_CFG_H_;
968 data &= ~MAC_CR_CFG_L_;
969 break;
970 case SPEED_100:
971 data &= ~MAC_CR_CFG_H_;
972 data |= MAC_CR_CFG_L_;
973 break;
974 case SPEED_1000:
975 data |= MAC_CR_CFG_H_;
976 data &= ~MAC_CR_CFG_L_;
977 break;
978 }
979 lan743x_csr_write(adapter, MAC_CR, data);
980
981 local_advertisement =
982 linkmode_adv_to_mii_adv_t(phydev->advertising);
983 remote_advertisement =
984 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
985
986 lan743x_phy_update_flowcontrol(adapter, local_advertisement,
987 remote_advertisement);
988 lan743x_ptp_update_latency(adapter, phydev->speed);
989 }
990 }
991
lan743x_phy_close(struct lan743x_adapter * adapter)992 static void lan743x_phy_close(struct lan743x_adapter *adapter)
993 {
994 struct net_device *netdev = adapter->netdev;
995
996 phy_stop(netdev->phydev);
997 phy_disconnect(netdev->phydev);
998 netdev->phydev = NULL;
999 }
1000
lan743x_phy_open(struct lan743x_adapter * adapter)1001 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1002 {
1003 struct net_device *netdev = adapter->netdev;
1004 struct lan743x_phy *phy = &adapter->phy;
1005 struct phy_device *phydev;
1006 int ret = -EIO;
1007
1008 /* try devicetree phy, or fixed link */
1009 phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1010 lan743x_phy_link_status_change);
1011
1012 if (!phydev) {
1013 /* try internal phy */
1014 phydev = phy_find_first(adapter->mdiobus);
1015 if (!phydev)
1016 goto return_error;
1017
1018 ret = phy_connect_direct(netdev, phydev,
1019 lan743x_phy_link_status_change,
1020 PHY_INTERFACE_MODE_GMII);
1021 if (ret)
1022 goto return_error;
1023 }
1024
1025 /* MAC doesn't support 1000T Half */
1026 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1027
1028 /* support both flow controls */
1029 phy_support_asym_pause(phydev);
1030 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1031 phy->fc_autoneg = phydev->autoneg;
1032
1033 phy_start(phydev);
1034 phy_start_aneg(phydev);
1035 phy_attached_info(phydev);
1036 return 0;
1037
1038 return_error:
1039 return ret;
1040 }
1041
lan743x_rfe_open(struct lan743x_adapter * adapter)1042 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1043 {
1044 lan743x_csr_write(adapter, RFE_RSS_CFG,
1045 RFE_RSS_CFG_UDP_IPV6_EX_ |
1046 RFE_RSS_CFG_TCP_IPV6_EX_ |
1047 RFE_RSS_CFG_IPV6_EX_ |
1048 RFE_RSS_CFG_UDP_IPV6_ |
1049 RFE_RSS_CFG_TCP_IPV6_ |
1050 RFE_RSS_CFG_IPV6_ |
1051 RFE_RSS_CFG_UDP_IPV4_ |
1052 RFE_RSS_CFG_TCP_IPV4_ |
1053 RFE_RSS_CFG_IPV4_ |
1054 RFE_RSS_CFG_VALID_HASH_BITS_ |
1055 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1056 RFE_RSS_CFG_RSS_HASH_STORE_ |
1057 RFE_RSS_CFG_RSS_ENABLE_);
1058 }
1059
lan743x_rfe_update_mac_address(struct lan743x_adapter * adapter)1060 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1061 {
1062 u8 *mac_addr;
1063 u32 mac_addr_hi = 0;
1064 u32 mac_addr_lo = 0;
1065
1066 /* Add mac address to perfect Filter */
1067 mac_addr = adapter->mac_address;
1068 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1069 (((u32)(mac_addr[1])) << 8) |
1070 (((u32)(mac_addr[2])) << 16) |
1071 (((u32)(mac_addr[3])) << 24));
1072 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1073 (((u32)(mac_addr[5])) << 8));
1074
1075 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1076 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1077 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1078 }
1079
lan743x_rfe_set_multicast(struct lan743x_adapter * adapter)1080 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1081 {
1082 struct net_device *netdev = adapter->netdev;
1083 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1084 u32 rfctl;
1085 u32 data;
1086
1087 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1088 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1089 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1090 rfctl |= RFE_CTL_AB_;
1091 if (netdev->flags & IFF_PROMISC) {
1092 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1093 } else {
1094 if (netdev->flags & IFF_ALLMULTI)
1095 rfctl |= RFE_CTL_AM_;
1096 }
1097
1098 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1099 if (netdev_mc_count(netdev)) {
1100 struct netdev_hw_addr *ha;
1101 int i;
1102
1103 rfctl |= RFE_CTL_DA_PERFECT_;
1104 i = 1;
1105 netdev_for_each_mc_addr(ha, netdev) {
1106 /* set first 32 into Perfect Filter */
1107 if (i < 33) {
1108 lan743x_csr_write(adapter,
1109 RFE_ADDR_FILT_HI(i), 0);
1110 data = ha->addr[3];
1111 data = ha->addr[2] | (data << 8);
1112 data = ha->addr[1] | (data << 8);
1113 data = ha->addr[0] | (data << 8);
1114 lan743x_csr_write(adapter,
1115 RFE_ADDR_FILT_LO(i), data);
1116 data = ha->addr[5];
1117 data = ha->addr[4] | (data << 8);
1118 data |= RFE_ADDR_FILT_HI_VALID_;
1119 lan743x_csr_write(adapter,
1120 RFE_ADDR_FILT_HI(i), data);
1121 } else {
1122 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1123 23) & 0x1FF;
1124 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1125 rfctl |= RFE_CTL_MCAST_HASH_;
1126 }
1127 i++;
1128 }
1129 }
1130
1131 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1132 DP_SEL_VHF_VLAN_LEN,
1133 DP_SEL_VHF_HASH_LEN, hash_table);
1134 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1135 }
1136
lan743x_dmac_init(struct lan743x_adapter * adapter)1137 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1138 {
1139 u32 data = 0;
1140
1141 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1142 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1143 0, 1000, 20000, 100);
1144 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1145 case DMA_DESCRIPTOR_SPACING_16:
1146 data = DMAC_CFG_MAX_DSPACE_16_;
1147 break;
1148 case DMA_DESCRIPTOR_SPACING_32:
1149 data = DMAC_CFG_MAX_DSPACE_32_;
1150 break;
1151 case DMA_DESCRIPTOR_SPACING_64:
1152 data = DMAC_CFG_MAX_DSPACE_64_;
1153 break;
1154 case DMA_DESCRIPTOR_SPACING_128:
1155 data = DMAC_CFG_MAX_DSPACE_128_;
1156 break;
1157 default:
1158 return -EPERM;
1159 }
1160 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1161 data |= DMAC_CFG_COAL_EN_;
1162 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1163 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1164 lan743x_csr_write(adapter, DMAC_CFG, data);
1165 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1166 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1167 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1168 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1169 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1170 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1171 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1172 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1173 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1174 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1175 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1176 return 0;
1177 }
1178
lan743x_dmac_tx_get_state(struct lan743x_adapter * adapter,int tx_channel)1179 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1180 int tx_channel)
1181 {
1182 u32 dmac_cmd = 0;
1183
1184 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1185 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1186 DMAC_CMD_START_T_(tx_channel)),
1187 (dmac_cmd &
1188 DMAC_CMD_STOP_T_(tx_channel)));
1189 }
1190
lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter * adapter,int tx_channel)1191 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1192 int tx_channel)
1193 {
1194 int timeout = 100;
1195 int result = 0;
1196
1197 while (timeout &&
1198 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1199 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1200 usleep_range(1000, 20000);
1201 timeout--;
1202 }
1203 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1204 result = -ENODEV;
1205 return result;
1206 }
1207
lan743x_dmac_rx_get_state(struct lan743x_adapter * adapter,int rx_channel)1208 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1209 int rx_channel)
1210 {
1211 u32 dmac_cmd = 0;
1212
1213 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1214 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1215 DMAC_CMD_START_R_(rx_channel)),
1216 (dmac_cmd &
1217 DMAC_CMD_STOP_R_(rx_channel)));
1218 }
1219
lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter * adapter,int rx_channel)1220 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1221 int rx_channel)
1222 {
1223 int timeout = 100;
1224 int result = 0;
1225
1226 while (timeout &&
1227 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1228 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1229 usleep_range(1000, 20000);
1230 timeout--;
1231 }
1232 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1233 result = -ENODEV;
1234 return result;
1235 }
1236
lan743x_tx_release_desc(struct lan743x_tx * tx,int descriptor_index,bool cleanup)1237 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1238 int descriptor_index, bool cleanup)
1239 {
1240 struct lan743x_tx_buffer_info *buffer_info = NULL;
1241 struct lan743x_tx_descriptor *descriptor = NULL;
1242 u32 descriptor_type = 0;
1243 bool ignore_sync;
1244
1245 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1246 buffer_info = &tx->buffer_info[descriptor_index];
1247 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1248 goto done;
1249
1250 descriptor_type = le32_to_cpu(descriptor->data0) &
1251 TX_DESC_DATA0_DTYPE_MASK_;
1252 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1253 goto clean_up_data_descriptor;
1254 else
1255 goto clear_active;
1256
1257 clean_up_data_descriptor:
1258 if (buffer_info->dma_ptr) {
1259 if (buffer_info->flags &
1260 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1261 dma_unmap_page(&tx->adapter->pdev->dev,
1262 buffer_info->dma_ptr,
1263 buffer_info->buffer_length,
1264 DMA_TO_DEVICE);
1265 } else {
1266 dma_unmap_single(&tx->adapter->pdev->dev,
1267 buffer_info->dma_ptr,
1268 buffer_info->buffer_length,
1269 DMA_TO_DEVICE);
1270 }
1271 buffer_info->dma_ptr = 0;
1272 buffer_info->buffer_length = 0;
1273 }
1274 if (!buffer_info->skb)
1275 goto clear_active;
1276
1277 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1278 dev_kfree_skb_any(buffer_info->skb);
1279 goto clear_skb;
1280 }
1281
1282 if (cleanup) {
1283 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1284 dev_kfree_skb_any(buffer_info->skb);
1285 } else {
1286 ignore_sync = (buffer_info->flags &
1287 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1288 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1289 buffer_info->skb, ignore_sync);
1290 }
1291
1292 clear_skb:
1293 buffer_info->skb = NULL;
1294
1295 clear_active:
1296 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1297
1298 done:
1299 memset(buffer_info, 0, sizeof(*buffer_info));
1300 memset(descriptor, 0, sizeof(*descriptor));
1301 }
1302
lan743x_tx_next_index(struct lan743x_tx * tx,int index)1303 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1304 {
1305 return ((++index) % tx->ring_size);
1306 }
1307
lan743x_tx_release_completed_descriptors(struct lan743x_tx * tx)1308 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1309 {
1310 while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1311 lan743x_tx_release_desc(tx, tx->last_head, false);
1312 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1313 }
1314 }
1315
lan743x_tx_release_all_descriptors(struct lan743x_tx * tx)1316 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1317 {
1318 u32 original_head = 0;
1319
1320 original_head = tx->last_head;
1321 do {
1322 lan743x_tx_release_desc(tx, tx->last_head, true);
1323 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1324 } while (tx->last_head != original_head);
1325 memset(tx->ring_cpu_ptr, 0,
1326 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1327 memset(tx->buffer_info, 0,
1328 sizeof(*tx->buffer_info) * (tx->ring_size));
1329 }
1330
lan743x_tx_get_desc_cnt(struct lan743x_tx * tx,struct sk_buff * skb)1331 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1332 struct sk_buff *skb)
1333 {
1334 int result = 1; /* 1 for the main skb buffer */
1335 int nr_frags = 0;
1336
1337 if (skb_is_gso(skb))
1338 result++; /* requires an extension descriptor */
1339 nr_frags = skb_shinfo(skb)->nr_frags;
1340 result += nr_frags; /* 1 for each fragment buffer */
1341 return result;
1342 }
1343
lan743x_tx_get_avail_desc(struct lan743x_tx * tx)1344 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1345 {
1346 int last_head = tx->last_head;
1347 int last_tail = tx->last_tail;
1348
1349 if (last_tail >= last_head)
1350 return tx->ring_size - last_tail + last_head - 1;
1351 else
1352 return last_head - last_tail - 1;
1353 }
1354
lan743x_tx_set_timestamping_mode(struct lan743x_tx * tx,bool enable_timestamping,bool enable_onestep_sync)1355 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1356 bool enable_timestamping,
1357 bool enable_onestep_sync)
1358 {
1359 if (enable_timestamping)
1360 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1361 else
1362 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1363 if (enable_onestep_sync)
1364 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1365 else
1366 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1367 }
1368
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)1369 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1370 unsigned char *first_buffer,
1371 unsigned int first_buffer_length,
1372 unsigned int frame_length,
1373 bool time_stamp,
1374 bool check_sum)
1375 {
1376 /* called only from within lan743x_tx_xmit_frame.
1377 * assuming tx->ring_lock has already been acquired.
1378 */
1379 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1380 struct lan743x_tx_buffer_info *buffer_info = NULL;
1381 struct lan743x_adapter *adapter = tx->adapter;
1382 struct device *dev = &adapter->pdev->dev;
1383 dma_addr_t dma_ptr;
1384
1385 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1386 tx->frame_first = tx->last_tail;
1387 tx->frame_tail = tx->frame_first;
1388
1389 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1390 buffer_info = &tx->buffer_info[tx->frame_tail];
1391 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1392 DMA_TO_DEVICE);
1393 if (dma_mapping_error(dev, dma_ptr))
1394 return -ENOMEM;
1395
1396 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1397 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1398 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1399 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1400
1401 buffer_info->skb = NULL;
1402 buffer_info->dma_ptr = dma_ptr;
1403 buffer_info->buffer_length = first_buffer_length;
1404 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1405
1406 tx->frame_data0 = (first_buffer_length &
1407 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1408 TX_DESC_DATA0_DTYPE_DATA_ |
1409 TX_DESC_DATA0_FS_ |
1410 TX_DESC_DATA0_FCS_;
1411 if (time_stamp)
1412 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1413
1414 if (check_sum)
1415 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1416 TX_DESC_DATA0_IPE_ |
1417 TX_DESC_DATA0_TPE_;
1418
1419 /* data0 will be programmed in one of other frame assembler functions */
1420 return 0;
1421 }
1422
lan743x_tx_frame_add_lso(struct lan743x_tx * tx,unsigned int frame_length,int nr_frags)1423 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1424 unsigned int frame_length,
1425 int nr_frags)
1426 {
1427 /* called only from within lan743x_tx_xmit_frame.
1428 * assuming tx->ring_lock has already been acquired.
1429 */
1430 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1431 struct lan743x_tx_buffer_info *buffer_info = NULL;
1432
1433 /* wrap up previous descriptor */
1434 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1435 if (nr_frags <= 0) {
1436 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1437 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1438 }
1439 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1440 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1441
1442 /* move to next descriptor */
1443 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1444 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1445 buffer_info = &tx->buffer_info[tx->frame_tail];
1446
1447 /* add extension descriptor */
1448 tx_descriptor->data1 = 0;
1449 tx_descriptor->data2 = 0;
1450 tx_descriptor->data3 = 0;
1451
1452 buffer_info->skb = NULL;
1453 buffer_info->dma_ptr = 0;
1454 buffer_info->buffer_length = 0;
1455 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1456
1457 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1458 TX_DESC_DATA0_DTYPE_EXT_ |
1459 TX_DESC_DATA0_EXT_LSO_;
1460
1461 /* data0 will be programmed in one of other frame assembler functions */
1462 }
1463
lan743x_tx_frame_add_fragment(struct lan743x_tx * tx,const skb_frag_t * fragment,unsigned int frame_length)1464 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1465 const skb_frag_t *fragment,
1466 unsigned int frame_length)
1467 {
1468 /* called only from within lan743x_tx_xmit_frame
1469 * assuming tx->ring_lock has already been acquired
1470 */
1471 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1472 struct lan743x_tx_buffer_info *buffer_info = NULL;
1473 struct lan743x_adapter *adapter = tx->adapter;
1474 struct device *dev = &adapter->pdev->dev;
1475 unsigned int fragment_length = 0;
1476 dma_addr_t dma_ptr;
1477
1478 fragment_length = skb_frag_size(fragment);
1479 if (!fragment_length)
1480 return 0;
1481
1482 /* wrap up previous descriptor */
1483 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1484 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1485
1486 /* move to next descriptor */
1487 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1488 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1489 buffer_info = &tx->buffer_info[tx->frame_tail];
1490 dma_ptr = skb_frag_dma_map(dev, fragment,
1491 0, fragment_length,
1492 DMA_TO_DEVICE);
1493 if (dma_mapping_error(dev, dma_ptr)) {
1494 int desc_index;
1495
1496 /* cleanup all previously setup descriptors */
1497 desc_index = tx->frame_first;
1498 while (desc_index != tx->frame_tail) {
1499 lan743x_tx_release_desc(tx, desc_index, true);
1500 desc_index = lan743x_tx_next_index(tx, desc_index);
1501 }
1502 dma_wmb();
1503 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1504 tx->frame_first = 0;
1505 tx->frame_data0 = 0;
1506 tx->frame_tail = 0;
1507 return -ENOMEM;
1508 }
1509
1510 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1511 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1512 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1513 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1514
1515 buffer_info->skb = NULL;
1516 buffer_info->dma_ptr = dma_ptr;
1517 buffer_info->buffer_length = fragment_length;
1518 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1519 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1520
1521 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1522 TX_DESC_DATA0_DTYPE_DATA_ |
1523 TX_DESC_DATA0_FCS_;
1524
1525 /* data0 will be programmed in one of other frame assembler functions */
1526 return 0;
1527 }
1528
lan743x_tx_frame_end(struct lan743x_tx * tx,struct sk_buff * skb,bool time_stamp,bool ignore_sync)1529 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1530 struct sk_buff *skb,
1531 bool time_stamp,
1532 bool ignore_sync)
1533 {
1534 /* called only from within lan743x_tx_xmit_frame
1535 * assuming tx->ring_lock has already been acquired
1536 */
1537 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1538 struct lan743x_tx_buffer_info *buffer_info = NULL;
1539 struct lan743x_adapter *adapter = tx->adapter;
1540 u32 tx_tail_flags = 0;
1541
1542 /* wrap up previous descriptor */
1543 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1544 TX_DESC_DATA0_DTYPE_DATA_) {
1545 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1546 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1547 }
1548
1549 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1550 buffer_info = &tx->buffer_info[tx->frame_tail];
1551 buffer_info->skb = skb;
1552 if (time_stamp)
1553 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1554 if (ignore_sync)
1555 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1556
1557 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1558 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1559 tx->last_tail = tx->frame_tail;
1560
1561 dma_wmb();
1562
1563 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1564 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1565 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1566 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1567 TX_TAIL_SET_TOP_INT_EN_;
1568
1569 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1570 tx_tail_flags | tx->frame_tail);
1571 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1572 }
1573
lan743x_tx_xmit_frame(struct lan743x_tx * tx,struct sk_buff * skb)1574 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1575 struct sk_buff *skb)
1576 {
1577 int required_number_of_descriptors = 0;
1578 unsigned int start_frame_length = 0;
1579 unsigned int frame_length = 0;
1580 unsigned int head_length = 0;
1581 unsigned long irq_flags = 0;
1582 bool do_timestamp = false;
1583 bool ignore_sync = false;
1584 int nr_frags = 0;
1585 bool gso = false;
1586 int j;
1587
1588 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1589
1590 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1591 if (required_number_of_descriptors >
1592 lan743x_tx_get_avail_desc(tx)) {
1593 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1594 dev_kfree_skb_irq(skb);
1595 } else {
1596 /* save to overflow buffer */
1597 tx->overflow_skb = skb;
1598 netif_stop_queue(tx->adapter->netdev);
1599 }
1600 goto unlock;
1601 }
1602
1603 /* space available, transmit skb */
1604 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1605 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1606 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1607 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1608 do_timestamp = true;
1609 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1610 ignore_sync = true;
1611 }
1612 head_length = skb_headlen(skb);
1613 frame_length = skb_pagelen(skb);
1614 nr_frags = skb_shinfo(skb)->nr_frags;
1615 start_frame_length = frame_length;
1616 gso = skb_is_gso(skb);
1617 if (gso) {
1618 start_frame_length = max(skb_shinfo(skb)->gso_size,
1619 (unsigned short)8);
1620 }
1621
1622 if (lan743x_tx_frame_start(tx,
1623 skb->data, head_length,
1624 start_frame_length,
1625 do_timestamp,
1626 skb->ip_summed == CHECKSUM_PARTIAL)) {
1627 dev_kfree_skb_irq(skb);
1628 goto unlock;
1629 }
1630
1631 if (gso)
1632 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1633
1634 if (nr_frags <= 0)
1635 goto finish;
1636
1637 for (j = 0; j < nr_frags; j++) {
1638 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1639
1640 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1641 /* upon error no need to call
1642 * lan743x_tx_frame_end
1643 * frame assembler clean up was performed inside
1644 * lan743x_tx_frame_add_fragment
1645 */
1646 dev_kfree_skb_irq(skb);
1647 goto unlock;
1648 }
1649 }
1650
1651 finish:
1652 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1653
1654 unlock:
1655 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1656 return NETDEV_TX_OK;
1657 }
1658
lan743x_tx_napi_poll(struct napi_struct * napi,int weight)1659 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1660 {
1661 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1662 struct lan743x_adapter *adapter = tx->adapter;
1663 bool start_transmitter = false;
1664 unsigned long irq_flags = 0;
1665 u32 ioc_bit = 0;
1666
1667 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1668 lan743x_csr_read(adapter, DMAC_INT_STS);
1669 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1670 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1671 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1672
1673 /* clean up tx ring */
1674 lan743x_tx_release_completed_descriptors(tx);
1675 if (netif_queue_stopped(adapter->netdev)) {
1676 if (tx->overflow_skb) {
1677 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1678 lan743x_tx_get_avail_desc(tx))
1679 start_transmitter = true;
1680 } else {
1681 netif_wake_queue(adapter->netdev);
1682 }
1683 }
1684 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1685
1686 if (start_transmitter) {
1687 /* space is now available, transmit overflow skb */
1688 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1689 tx->overflow_skb = NULL;
1690 netif_wake_queue(adapter->netdev);
1691 }
1692
1693 if (!napi_complete(napi))
1694 goto done;
1695
1696 /* enable isr */
1697 lan743x_csr_write(adapter, INT_EN_SET,
1698 INT_BIT_DMA_TX_(tx->channel_number));
1699 lan743x_csr_read(adapter, INT_STS);
1700
1701 done:
1702 return 0;
1703 }
1704
lan743x_tx_ring_cleanup(struct lan743x_tx * tx)1705 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1706 {
1707 if (tx->head_cpu_ptr) {
1708 dma_free_coherent(&tx->adapter->pdev->dev,
1709 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1710 tx->head_dma_ptr);
1711 tx->head_cpu_ptr = NULL;
1712 tx->head_dma_ptr = 0;
1713 }
1714 kfree(tx->buffer_info);
1715 tx->buffer_info = NULL;
1716
1717 if (tx->ring_cpu_ptr) {
1718 dma_free_coherent(&tx->adapter->pdev->dev,
1719 tx->ring_allocation_size, tx->ring_cpu_ptr,
1720 tx->ring_dma_ptr);
1721 tx->ring_allocation_size = 0;
1722 tx->ring_cpu_ptr = NULL;
1723 tx->ring_dma_ptr = 0;
1724 }
1725 tx->ring_size = 0;
1726 }
1727
lan743x_tx_ring_init(struct lan743x_tx * tx)1728 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1729 {
1730 size_t ring_allocation_size = 0;
1731 void *cpu_ptr = NULL;
1732 dma_addr_t dma_ptr;
1733 int ret = -ENOMEM;
1734
1735 tx->ring_size = LAN743X_TX_RING_SIZE;
1736 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1737 ret = -EINVAL;
1738 goto cleanup;
1739 }
1740 if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
1741 DMA_BIT_MASK(64))) {
1742 if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
1743 DMA_BIT_MASK(32))) {
1744 dev_warn(&tx->adapter->pdev->dev,
1745 "lan743x_: No suitable DMA available\n");
1746 ret = -ENOMEM;
1747 goto cleanup;
1748 }
1749 }
1750 ring_allocation_size = ALIGN(tx->ring_size *
1751 sizeof(struct lan743x_tx_descriptor),
1752 PAGE_SIZE);
1753 dma_ptr = 0;
1754 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1755 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1756 if (!cpu_ptr) {
1757 ret = -ENOMEM;
1758 goto cleanup;
1759 }
1760
1761 tx->ring_allocation_size = ring_allocation_size;
1762 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1763 tx->ring_dma_ptr = dma_ptr;
1764
1765 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1766 if (!cpu_ptr) {
1767 ret = -ENOMEM;
1768 goto cleanup;
1769 }
1770 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1771 dma_ptr = 0;
1772 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1773 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1774 GFP_KERNEL);
1775 if (!cpu_ptr) {
1776 ret = -ENOMEM;
1777 goto cleanup;
1778 }
1779
1780 tx->head_cpu_ptr = cpu_ptr;
1781 tx->head_dma_ptr = dma_ptr;
1782 if (tx->head_dma_ptr & 0x3) {
1783 ret = -ENOMEM;
1784 goto cleanup;
1785 }
1786
1787 return 0;
1788
1789 cleanup:
1790 lan743x_tx_ring_cleanup(tx);
1791 return ret;
1792 }
1793
lan743x_tx_close(struct lan743x_tx * tx)1794 static void lan743x_tx_close(struct lan743x_tx *tx)
1795 {
1796 struct lan743x_adapter *adapter = tx->adapter;
1797
1798 lan743x_csr_write(adapter,
1799 DMAC_CMD,
1800 DMAC_CMD_STOP_T_(tx->channel_number));
1801 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1802
1803 lan743x_csr_write(adapter,
1804 DMAC_INT_EN_CLR,
1805 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1806 lan743x_csr_write(adapter, INT_EN_CLR,
1807 INT_BIT_DMA_TX_(tx->channel_number));
1808 napi_disable(&tx->napi);
1809 netif_napi_del(&tx->napi);
1810
1811 lan743x_csr_write(adapter, FCT_TX_CTL,
1812 FCT_TX_CTL_DIS_(tx->channel_number));
1813 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1814 FCT_TX_CTL_EN_(tx->channel_number),
1815 0, 1000, 20000, 100);
1816
1817 lan743x_tx_release_all_descriptors(tx);
1818
1819 if (tx->overflow_skb) {
1820 dev_kfree_skb(tx->overflow_skb);
1821 tx->overflow_skb = NULL;
1822 }
1823
1824 lan743x_tx_ring_cleanup(tx);
1825 }
1826
lan743x_tx_open(struct lan743x_tx * tx)1827 static int lan743x_tx_open(struct lan743x_tx *tx)
1828 {
1829 struct lan743x_adapter *adapter = NULL;
1830 u32 data = 0;
1831 int ret;
1832
1833 adapter = tx->adapter;
1834 ret = lan743x_tx_ring_init(tx);
1835 if (ret)
1836 return ret;
1837
1838 /* initialize fifo */
1839 lan743x_csr_write(adapter, FCT_TX_CTL,
1840 FCT_TX_CTL_RESET_(tx->channel_number));
1841 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1842 FCT_TX_CTL_RESET_(tx->channel_number),
1843 0, 1000, 20000, 100);
1844
1845 /* enable fifo */
1846 lan743x_csr_write(adapter, FCT_TX_CTL,
1847 FCT_TX_CTL_EN_(tx->channel_number));
1848
1849 /* reset tx channel */
1850 lan743x_csr_write(adapter, DMAC_CMD,
1851 DMAC_CMD_TX_SWR_(tx->channel_number));
1852 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
1853 DMAC_CMD_TX_SWR_(tx->channel_number),
1854 0, 1000, 20000, 100);
1855
1856 /* Write TX_BASE_ADDR */
1857 lan743x_csr_write(adapter,
1858 TX_BASE_ADDRH(tx->channel_number),
1859 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
1860 lan743x_csr_write(adapter,
1861 TX_BASE_ADDRL(tx->channel_number),
1862 DMA_ADDR_LOW32(tx->ring_dma_ptr));
1863
1864 /* Write TX_CFG_B */
1865 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
1866 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
1867 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
1868 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1869 data |= TX_CFG_B_TDMABL_512_;
1870 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
1871
1872 /* Write TX_CFG_A */
1873 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
1874 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
1875 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
1876 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
1877 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
1878 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
1879 }
1880 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
1881
1882 /* Write TX_HEAD_WRITEBACK_ADDR */
1883 lan743x_csr_write(adapter,
1884 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
1885 DMA_ADDR_HIGH32(tx->head_dma_ptr));
1886 lan743x_csr_write(adapter,
1887 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
1888 DMA_ADDR_LOW32(tx->head_dma_ptr));
1889
1890 /* set last head */
1891 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
1892
1893 /* write TX_TAIL */
1894 tx->last_tail = 0;
1895 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1896 (u32)(tx->last_tail));
1897 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
1898 INT_BIT_DMA_TX_
1899 (tx->channel_number));
1900 netif_tx_napi_add(adapter->netdev,
1901 &tx->napi, lan743x_tx_napi_poll,
1902 tx->ring_size - 1);
1903 napi_enable(&tx->napi);
1904
1905 data = 0;
1906 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
1907 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
1908 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
1909 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
1910 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
1911 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
1912 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
1913 data |= TX_CFG_C_TX_INT_EN_R2C_;
1914 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
1915
1916 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
1917 lan743x_csr_write(adapter, INT_EN_SET,
1918 INT_BIT_DMA_TX_(tx->channel_number));
1919 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
1920 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1921
1922 /* start dmac channel */
1923 lan743x_csr_write(adapter, DMAC_CMD,
1924 DMAC_CMD_START_T_(tx->channel_number));
1925 return 0;
1926 }
1927
lan743x_rx_next_index(struct lan743x_rx * rx,int index)1928 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
1929 {
1930 return ((++index) % rx->ring_size);
1931 }
1932
lan743x_rx_update_tail(struct lan743x_rx * rx,int index)1933 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
1934 {
1935 /* update the tail once per 8 descriptors */
1936 if ((index & 7) == 7)
1937 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
1938 index);
1939 }
1940
lan743x_rx_init_ring_element(struct lan743x_rx * rx,int index,gfp_t gfp)1941 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
1942 gfp_t gfp)
1943 {
1944 struct net_device *netdev = rx->adapter->netdev;
1945 struct device *dev = &rx->adapter->pdev->dev;
1946 struct lan743x_rx_buffer_info *buffer_info;
1947 unsigned int buffer_length, used_length;
1948 struct lan743x_rx_descriptor *descriptor;
1949 struct sk_buff *skb;
1950 dma_addr_t dma_ptr;
1951
1952 buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
1953
1954 descriptor = &rx->ring_cpu_ptr[index];
1955 buffer_info = &rx->buffer_info[index];
1956 skb = __netdev_alloc_skb(netdev, buffer_length, gfp);
1957 if (!skb)
1958 return -ENOMEM;
1959 dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
1960 if (dma_mapping_error(dev, dma_ptr)) {
1961 dev_kfree_skb_any(skb);
1962 return -ENOMEM;
1963 }
1964 if (buffer_info->dma_ptr) {
1965 /* sync used area of buffer only */
1966 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
1967 /* frame length is valid only if LS bit is set.
1968 * it's a safe upper bound for the used area in this
1969 * buffer.
1970 */
1971 used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
1972 (le32_to_cpu(descriptor->data0)),
1973 buffer_info->buffer_length);
1974 else
1975 used_length = buffer_info->buffer_length;
1976 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
1977 used_length,
1978 DMA_FROM_DEVICE);
1979 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
1980 buffer_info->buffer_length,
1981 DMA_FROM_DEVICE,
1982 DMA_ATTR_SKIP_CPU_SYNC);
1983 }
1984
1985 buffer_info->skb = skb;
1986 buffer_info->dma_ptr = dma_ptr;
1987 buffer_info->buffer_length = buffer_length;
1988 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
1989 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
1990 descriptor->data3 = 0;
1991 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
1992 (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
1993 lan743x_rx_update_tail(rx, index);
1994
1995 return 0;
1996 }
1997
lan743x_rx_reuse_ring_element(struct lan743x_rx * rx,int index)1998 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
1999 {
2000 struct lan743x_rx_buffer_info *buffer_info;
2001 struct lan743x_rx_descriptor *descriptor;
2002
2003 descriptor = &rx->ring_cpu_ptr[index];
2004 buffer_info = &rx->buffer_info[index];
2005
2006 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2007 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2008 descriptor->data3 = 0;
2009 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2010 ((buffer_info->buffer_length) &
2011 RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2012 lan743x_rx_update_tail(rx, index);
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
2041 static struct sk_buff *
lan743x_rx_trim_skb(struct sk_buff * skb,int frame_length)2042 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2043 {
2044 if (skb_linearize(skb)) {
2045 dev_kfree_skb_irq(skb);
2046 return NULL;
2047 }
2048 frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2049 if (skb->len > frame_length) {
2050 skb->tail -= skb->len - frame_length;
2051 skb->len = frame_length;
2052 }
2053 return skb;
2054 }
2055
lan743x_rx_process_buffer(struct lan743x_rx * rx)2056 static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2057 {
2058 int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2059 struct lan743x_rx_descriptor *descriptor, *desc_ext;
2060 struct net_device *netdev = rx->adapter->netdev;
2061 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2062 struct lan743x_rx_buffer_info *buffer_info;
2063 int frame_length, buffer_length;
2064 int extension_index = -1;
2065 bool is_last, is_first;
2066 struct sk_buff *skb;
2067
2068 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2069 goto done;
2070
2071 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2072 goto done;
2073
2074 if (rx->last_head == current_head_index)
2075 goto done;
2076
2077 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2078 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2079 goto done;
2080 buffer_info = &rx->buffer_info[rx->last_head];
2081
2082 is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2083 is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2084
2085 if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2086 /* extension is expected to follow */
2087 int index = lan743x_rx_next_index(rx, rx->last_head);
2088
2089 if (index == current_head_index)
2090 /* extension not yet available */
2091 goto done;
2092 desc_ext = &rx->ring_cpu_ptr[index];
2093 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2094 /* extension not yet available */
2095 goto done;
2096 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2097 goto move_forward;
2098 extension_index = index;
2099 }
2100
2101 /* Only the last buffer in a multi-buffer frame contains the total frame
2102 * length. The chip occasionally sends more buffers than strictly
2103 * required to reach the total frame length.
2104 * Handle this by adding all buffers to the skb in their entirety.
2105 * Once the real frame length is known, trim the skb.
2106 */
2107 frame_length =
2108 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2109 buffer_length = buffer_info->buffer_length;
2110
2111 netdev_dbg(netdev, "%s%schunk: %d/%d",
2112 is_first ? "first " : " ",
2113 is_last ? "last " : " ",
2114 frame_length, buffer_length);
2115
2116 /* save existing skb, allocate new skb and map to dma */
2117 skb = buffer_info->skb;
2118 if (lan743x_rx_init_ring_element(rx, rx->last_head,
2119 GFP_ATOMIC | GFP_DMA)) {
2120 /* failed to allocate next skb.
2121 * Memory is very low.
2122 * Drop this packet and reuse buffer.
2123 */
2124 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2125 /* drop packet that was being assembled */
2126 dev_kfree_skb_irq(rx->skb_head);
2127 rx->skb_head = NULL;
2128 goto process_extension;
2129 }
2130
2131 /* add buffers to skb via skb->frag_list */
2132 if (is_first) {
2133 skb_reserve(skb, RX_HEAD_PADDING);
2134 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2135 if (rx->skb_head)
2136 dev_kfree_skb_irq(rx->skb_head);
2137 rx->skb_head = skb;
2138 } else if (rx->skb_head) {
2139 skb_put(skb, buffer_length);
2140 if (skb_shinfo(rx->skb_head)->frag_list)
2141 rx->skb_tail->next = skb;
2142 else
2143 skb_shinfo(rx->skb_head)->frag_list = skb;
2144 rx->skb_tail = skb;
2145 rx->skb_head->len += skb->len;
2146 rx->skb_head->data_len += skb->len;
2147 rx->skb_head->truesize += skb->truesize;
2148 } else {
2149 /* packet to assemble has already been dropped because one or
2150 * more of its buffers could not be allocated
2151 */
2152 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2153 dev_kfree_skb_irq(skb);
2154 }
2155
2156 process_extension:
2157 if (extension_index >= 0) {
2158 u32 ts_sec;
2159 u32 ts_nsec;
2160
2161 ts_sec = le32_to_cpu(desc_ext->data1);
2162 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2163 RX_DESC_DATA2_TS_NS_MASK_);
2164 if (rx->skb_head)
2165 skb_hwtstamps(rx->skb_head)->hwtstamp =
2166 ktime_set(ts_sec, ts_nsec);
2167 lan743x_rx_reuse_ring_element(rx, extension_index);
2168 rx->last_head = extension_index;
2169 netdev_dbg(netdev, "process extension");
2170 }
2171
2172 if (is_last && rx->skb_head)
2173 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2174
2175 if (is_last && rx->skb_head) {
2176 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2177 rx->adapter->netdev);
2178 netdev_dbg(netdev, "sending %d byte frame to OS",
2179 rx->skb_head->len);
2180 napi_gro_receive(&rx->napi, rx->skb_head);
2181 rx->skb_head = NULL;
2182 }
2183
2184 move_forward:
2185 /* push tail and head forward */
2186 rx->last_tail = rx->last_head;
2187 rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2188 result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2189 done:
2190 return result;
2191 }
2192
lan743x_rx_napi_poll(struct napi_struct * napi,int weight)2193 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2194 {
2195 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2196 struct lan743x_adapter *adapter = rx->adapter;
2197 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2198 u32 rx_tail_flags = 0;
2199 int count;
2200
2201 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2202 /* clear int status bit before reading packet */
2203 lan743x_csr_write(adapter, DMAC_INT_STS,
2204 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2205 }
2206 for (count = 0; count < weight; count++) {
2207 result = lan743x_rx_process_buffer(rx);
2208 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2209 break;
2210 }
2211 rx->frame_count += count;
2212 if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2213 return weight;
2214
2215 if (!napi_complete_done(napi, count))
2216 return count;
2217
2218 /* re-arm interrupts, must write to rx tail on some chip variants */
2219 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2220 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2221 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2222 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2223 } else {
2224 lan743x_csr_write(adapter, INT_EN_SET,
2225 INT_BIT_DMA_RX_(rx->channel_number));
2226 }
2227
2228 if (rx_tail_flags)
2229 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2230 rx_tail_flags | rx->last_tail);
2231
2232 return count;
2233 }
2234
lan743x_rx_ring_cleanup(struct lan743x_rx * rx)2235 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2236 {
2237 if (rx->buffer_info && rx->ring_cpu_ptr) {
2238 int index;
2239
2240 for (index = 0; index < rx->ring_size; index++)
2241 lan743x_rx_release_ring_element(rx, index);
2242 }
2243
2244 if (rx->head_cpu_ptr) {
2245 dma_free_coherent(&rx->adapter->pdev->dev,
2246 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2247 rx->head_dma_ptr);
2248 rx->head_cpu_ptr = NULL;
2249 rx->head_dma_ptr = 0;
2250 }
2251
2252 kfree(rx->buffer_info);
2253 rx->buffer_info = NULL;
2254
2255 if (rx->ring_cpu_ptr) {
2256 dma_free_coherent(&rx->adapter->pdev->dev,
2257 rx->ring_allocation_size, rx->ring_cpu_ptr,
2258 rx->ring_dma_ptr);
2259 rx->ring_allocation_size = 0;
2260 rx->ring_cpu_ptr = NULL;
2261 rx->ring_dma_ptr = 0;
2262 }
2263
2264 rx->ring_size = 0;
2265 rx->last_head = 0;
2266 }
2267
lan743x_rx_ring_init(struct lan743x_rx * rx)2268 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2269 {
2270 size_t ring_allocation_size = 0;
2271 dma_addr_t dma_ptr = 0;
2272 void *cpu_ptr = NULL;
2273 int ret = -ENOMEM;
2274 int index = 0;
2275
2276 rx->ring_size = LAN743X_RX_RING_SIZE;
2277 if (rx->ring_size <= 1) {
2278 ret = -EINVAL;
2279 goto cleanup;
2280 }
2281 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2282 ret = -EINVAL;
2283 goto cleanup;
2284 }
2285 if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2286 DMA_BIT_MASK(64))) {
2287 if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2288 DMA_BIT_MASK(32))) {
2289 dev_warn(&rx->adapter->pdev->dev,
2290 "lan743x_: No suitable DMA available\n");
2291 ret = -ENOMEM;
2292 goto cleanup;
2293 }
2294 }
2295 ring_allocation_size = ALIGN(rx->ring_size *
2296 sizeof(struct lan743x_rx_descriptor),
2297 PAGE_SIZE);
2298 dma_ptr = 0;
2299 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2300 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2301 if (!cpu_ptr) {
2302 ret = -ENOMEM;
2303 goto cleanup;
2304 }
2305 rx->ring_allocation_size = ring_allocation_size;
2306 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2307 rx->ring_dma_ptr = dma_ptr;
2308
2309 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2310 GFP_KERNEL);
2311 if (!cpu_ptr) {
2312 ret = -ENOMEM;
2313 goto cleanup;
2314 }
2315 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2316 dma_ptr = 0;
2317 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2318 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2319 GFP_KERNEL);
2320 if (!cpu_ptr) {
2321 ret = -ENOMEM;
2322 goto cleanup;
2323 }
2324
2325 rx->head_cpu_ptr = cpu_ptr;
2326 rx->head_dma_ptr = dma_ptr;
2327 if (rx->head_dma_ptr & 0x3) {
2328 ret = -ENOMEM;
2329 goto cleanup;
2330 }
2331
2332 rx->last_head = 0;
2333 for (index = 0; index < rx->ring_size; index++) {
2334 ret = lan743x_rx_init_ring_element(rx, index, GFP_KERNEL);
2335 if (ret)
2336 goto cleanup;
2337 }
2338 return 0;
2339
2340 cleanup:
2341 netif_warn(rx->adapter, ifup, rx->adapter->netdev,
2342 "Error allocating memory for LAN743x\n");
2343
2344 lan743x_rx_ring_cleanup(rx);
2345 return ret;
2346 }
2347
lan743x_rx_close(struct lan743x_rx * rx)2348 static void lan743x_rx_close(struct lan743x_rx *rx)
2349 {
2350 struct lan743x_adapter *adapter = rx->adapter;
2351
2352 lan743x_csr_write(adapter, FCT_RX_CTL,
2353 FCT_RX_CTL_DIS_(rx->channel_number));
2354 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2355 FCT_RX_CTL_EN_(rx->channel_number),
2356 0, 1000, 20000, 100);
2357
2358 lan743x_csr_write(adapter, DMAC_CMD,
2359 DMAC_CMD_STOP_R_(rx->channel_number));
2360 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2361
2362 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2363 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2364 lan743x_csr_write(adapter, INT_EN_CLR,
2365 INT_BIT_DMA_RX_(rx->channel_number));
2366 napi_disable(&rx->napi);
2367
2368 netif_napi_del(&rx->napi);
2369
2370 lan743x_rx_ring_cleanup(rx);
2371 }
2372
lan743x_rx_open(struct lan743x_rx * rx)2373 static int lan743x_rx_open(struct lan743x_rx *rx)
2374 {
2375 struct lan743x_adapter *adapter = rx->adapter;
2376 u32 data = 0;
2377 int ret;
2378
2379 rx->frame_count = 0;
2380 ret = lan743x_rx_ring_init(rx);
2381 if (ret)
2382 goto return_error;
2383
2384 netif_napi_add(adapter->netdev,
2385 &rx->napi, lan743x_rx_napi_poll,
2386 NAPI_POLL_WEIGHT);
2387
2388 lan743x_csr_write(adapter, DMAC_CMD,
2389 DMAC_CMD_RX_SWR_(rx->channel_number));
2390 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2391 DMAC_CMD_RX_SWR_(rx->channel_number),
2392 0, 1000, 20000, 100);
2393
2394 /* set ring base address */
2395 lan743x_csr_write(adapter,
2396 RX_BASE_ADDRH(rx->channel_number),
2397 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2398 lan743x_csr_write(adapter,
2399 RX_BASE_ADDRL(rx->channel_number),
2400 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2401
2402 /* set rx write back address */
2403 lan743x_csr_write(adapter,
2404 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2405 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2406 lan743x_csr_write(adapter,
2407 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2408 DMA_ADDR_LOW32(rx->head_dma_ptr));
2409 data = RX_CFG_A_RX_HP_WB_EN_;
2410 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2411 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2412 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2413 RX_CFG_A_RX_PF_THRES_SET_(16) |
2414 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2415 }
2416
2417 /* set RX_CFG_A */
2418 lan743x_csr_write(adapter,
2419 RX_CFG_A(rx->channel_number), data);
2420
2421 /* set RX_CFG_B */
2422 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2423 data &= ~RX_CFG_B_RX_PAD_MASK_;
2424 if (!RX_HEAD_PADDING)
2425 data |= RX_CFG_B_RX_PAD_0_;
2426 else
2427 data |= RX_CFG_B_RX_PAD_2_;
2428 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2429 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2430 data |= RX_CFG_B_TS_ALL_RX_;
2431 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2432 data |= RX_CFG_B_RDMABL_512_;
2433
2434 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2435 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2436 INT_BIT_DMA_RX_
2437 (rx->channel_number));
2438
2439 /* set RX_CFG_C */
2440 data = 0;
2441 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2442 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2443 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2444 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2445 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2446 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2447 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2448 data |= RX_CFG_C_RX_INT_EN_R2C_;
2449 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2450
2451 rx->last_tail = ((u32)(rx->ring_size - 1));
2452 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2453 rx->last_tail);
2454 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2455 if (rx->last_head) {
2456 ret = -EIO;
2457 goto napi_delete;
2458 }
2459
2460 napi_enable(&rx->napi);
2461
2462 lan743x_csr_write(adapter, INT_EN_SET,
2463 INT_BIT_DMA_RX_(rx->channel_number));
2464 lan743x_csr_write(adapter, DMAC_INT_STS,
2465 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2466 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2467 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2468 lan743x_csr_write(adapter, DMAC_CMD,
2469 DMAC_CMD_START_R_(rx->channel_number));
2470
2471 /* initialize fifo */
2472 lan743x_csr_write(adapter, FCT_RX_CTL,
2473 FCT_RX_CTL_RESET_(rx->channel_number));
2474 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2475 FCT_RX_CTL_RESET_(rx->channel_number),
2476 0, 1000, 20000, 100);
2477 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2478 FCT_FLOW_CTL_REQ_EN_ |
2479 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2480 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2481
2482 /* enable fifo */
2483 lan743x_csr_write(adapter, FCT_RX_CTL,
2484 FCT_RX_CTL_EN_(rx->channel_number));
2485 return 0;
2486
2487 napi_delete:
2488 netif_napi_del(&rx->napi);
2489 lan743x_rx_ring_cleanup(rx);
2490
2491 return_error:
2492 return ret;
2493 }
2494
lan743x_netdev_close(struct net_device * netdev)2495 static int lan743x_netdev_close(struct net_device *netdev)
2496 {
2497 struct lan743x_adapter *adapter = netdev_priv(netdev);
2498 int index;
2499
2500 lan743x_tx_close(&adapter->tx[0]);
2501
2502 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2503 lan743x_rx_close(&adapter->rx[index]);
2504
2505 lan743x_ptp_close(adapter);
2506
2507 lan743x_phy_close(adapter);
2508
2509 lan743x_mac_close(adapter);
2510
2511 lan743x_intr_close(adapter);
2512
2513 return 0;
2514 }
2515
lan743x_netdev_open(struct net_device * netdev)2516 static int lan743x_netdev_open(struct net_device *netdev)
2517 {
2518 struct lan743x_adapter *adapter = netdev_priv(netdev);
2519 int index;
2520 int ret;
2521
2522 ret = lan743x_intr_open(adapter);
2523 if (ret)
2524 goto return_error;
2525
2526 ret = lan743x_mac_open(adapter);
2527 if (ret)
2528 goto close_intr;
2529
2530 ret = lan743x_phy_open(adapter);
2531 if (ret)
2532 goto close_mac;
2533
2534 ret = lan743x_ptp_open(adapter);
2535 if (ret)
2536 goto close_phy;
2537
2538 lan743x_rfe_open(adapter);
2539
2540 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2541 ret = lan743x_rx_open(&adapter->rx[index]);
2542 if (ret)
2543 goto close_rx;
2544 }
2545
2546 ret = lan743x_tx_open(&adapter->tx[0]);
2547 if (ret)
2548 goto close_rx;
2549
2550 return 0;
2551
2552 close_rx:
2553 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2554 if (adapter->rx[index].ring_cpu_ptr)
2555 lan743x_rx_close(&adapter->rx[index]);
2556 }
2557 lan743x_ptp_close(adapter);
2558
2559 close_phy:
2560 lan743x_phy_close(adapter);
2561
2562 close_mac:
2563 lan743x_mac_close(adapter);
2564
2565 close_intr:
2566 lan743x_intr_close(adapter);
2567
2568 return_error:
2569 netif_warn(adapter, ifup, adapter->netdev,
2570 "Error opening LAN743x\n");
2571 return ret;
2572 }
2573
lan743x_netdev_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2574 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2575 struct net_device *netdev)
2576 {
2577 struct lan743x_adapter *adapter = netdev_priv(netdev);
2578
2579 return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
2580 }
2581
lan743x_netdev_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)2582 static int lan743x_netdev_ioctl(struct net_device *netdev,
2583 struct ifreq *ifr, int cmd)
2584 {
2585 if (!netif_running(netdev))
2586 return -EINVAL;
2587 if (cmd == SIOCSHWTSTAMP)
2588 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2589 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2590 }
2591
lan743x_netdev_set_multicast(struct net_device * netdev)2592 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2593 {
2594 struct lan743x_adapter *adapter = netdev_priv(netdev);
2595
2596 lan743x_rfe_set_multicast(adapter);
2597 }
2598
lan743x_netdev_change_mtu(struct net_device * netdev,int new_mtu)2599 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2600 {
2601 struct lan743x_adapter *adapter = netdev_priv(netdev);
2602 int ret = 0;
2603
2604 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2605 if (!ret)
2606 netdev->mtu = new_mtu;
2607 return ret;
2608 }
2609
lan743x_netdev_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * stats)2610 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2611 struct rtnl_link_stats64 *stats)
2612 {
2613 struct lan743x_adapter *adapter = netdev_priv(netdev);
2614
2615 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2616 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2617 stats->rx_bytes = lan743x_csr_read(adapter,
2618 STAT_RX_UNICAST_BYTE_COUNT) +
2619 lan743x_csr_read(adapter,
2620 STAT_RX_BROADCAST_BYTE_COUNT) +
2621 lan743x_csr_read(adapter,
2622 STAT_RX_MULTICAST_BYTE_COUNT);
2623 stats->tx_bytes = lan743x_csr_read(adapter,
2624 STAT_TX_UNICAST_BYTE_COUNT) +
2625 lan743x_csr_read(adapter,
2626 STAT_TX_BROADCAST_BYTE_COUNT) +
2627 lan743x_csr_read(adapter,
2628 STAT_TX_MULTICAST_BYTE_COUNT);
2629 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2630 lan743x_csr_read(adapter,
2631 STAT_RX_ALIGNMENT_ERRORS) +
2632 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2633 lan743x_csr_read(adapter,
2634 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2635 lan743x_csr_read(adapter,
2636 STAT_RX_OVERSIZE_FRAME_ERRORS);
2637 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2638 lan743x_csr_read(adapter,
2639 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2640 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2641 stats->rx_dropped = lan743x_csr_read(adapter,
2642 STAT_RX_DROPPED_FRAMES);
2643 stats->tx_dropped = lan743x_csr_read(adapter,
2644 STAT_TX_EXCESSIVE_COLLISION);
2645 stats->multicast = lan743x_csr_read(adapter,
2646 STAT_RX_MULTICAST_FRAMES) +
2647 lan743x_csr_read(adapter,
2648 STAT_TX_MULTICAST_FRAMES);
2649 stats->collisions = lan743x_csr_read(adapter,
2650 STAT_TX_SINGLE_COLLISIONS) +
2651 lan743x_csr_read(adapter,
2652 STAT_TX_MULTIPLE_COLLISIONS) +
2653 lan743x_csr_read(adapter,
2654 STAT_TX_LATE_COLLISIONS);
2655 }
2656
lan743x_netdev_set_mac_address(struct net_device * netdev,void * addr)2657 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2658 void *addr)
2659 {
2660 struct lan743x_adapter *adapter = netdev_priv(netdev);
2661 struct sockaddr *sock_addr = addr;
2662 int ret;
2663
2664 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2665 if (ret)
2666 return ret;
2667 eth_hw_addr_set(netdev, sock_addr->sa_data);
2668 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2669 lan743x_rfe_update_mac_address(adapter);
2670 return 0;
2671 }
2672
2673 static const struct net_device_ops lan743x_netdev_ops = {
2674 .ndo_open = lan743x_netdev_open,
2675 .ndo_stop = lan743x_netdev_close,
2676 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2677 .ndo_eth_ioctl = lan743x_netdev_ioctl,
2678 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2679 .ndo_change_mtu = lan743x_netdev_change_mtu,
2680 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2681 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2682 };
2683
lan743x_hardware_cleanup(struct lan743x_adapter * adapter)2684 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2685 {
2686 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2687 }
2688
lan743x_mdiobus_cleanup(struct lan743x_adapter * adapter)2689 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2690 {
2691 mdiobus_unregister(adapter->mdiobus);
2692 }
2693
lan743x_full_cleanup(struct lan743x_adapter * adapter)2694 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2695 {
2696 unregister_netdev(adapter->netdev);
2697
2698 lan743x_mdiobus_cleanup(adapter);
2699 lan743x_hardware_cleanup(adapter);
2700 lan743x_pci_cleanup(adapter);
2701 }
2702
lan743x_hardware_init(struct lan743x_adapter * adapter,struct pci_dev * pdev)2703 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2704 struct pci_dev *pdev)
2705 {
2706 struct lan743x_tx *tx;
2707 int index;
2708 int ret;
2709
2710 adapter->intr.irq = adapter->pdev->irq;
2711 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2712
2713 ret = lan743x_gpio_init(adapter);
2714 if (ret)
2715 return ret;
2716
2717 ret = lan743x_mac_init(adapter);
2718 if (ret)
2719 return ret;
2720
2721 ret = lan743x_phy_init(adapter);
2722 if (ret)
2723 return ret;
2724
2725 ret = lan743x_ptp_init(adapter);
2726 if (ret)
2727 return ret;
2728
2729 lan743x_rfe_update_mac_address(adapter);
2730
2731 ret = lan743x_dmac_init(adapter);
2732 if (ret)
2733 return ret;
2734
2735 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2736 adapter->rx[index].adapter = adapter;
2737 adapter->rx[index].channel_number = index;
2738 }
2739
2740 tx = &adapter->tx[0];
2741 tx->adapter = adapter;
2742 tx->channel_number = 0;
2743 spin_lock_init(&tx->ring_lock);
2744 return 0;
2745 }
2746
lan743x_mdiobus_init(struct lan743x_adapter * adapter)2747 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2748 {
2749 int ret;
2750
2751 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2752 if (!(adapter->mdiobus)) {
2753 ret = -ENOMEM;
2754 goto return_error;
2755 }
2756
2757 adapter->mdiobus->priv = (void *)adapter;
2758 adapter->mdiobus->read = lan743x_mdiobus_read;
2759 adapter->mdiobus->write = lan743x_mdiobus_write;
2760 adapter->mdiobus->name = "lan743x-mdiobus";
2761 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2762 "pci-%s", pci_name(adapter->pdev));
2763
2764 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2765 /* LAN7430 uses internal phy at address 1 */
2766 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2767
2768 /* register mdiobus */
2769 ret = mdiobus_register(adapter->mdiobus);
2770 if (ret < 0)
2771 goto return_error;
2772 return 0;
2773
2774 return_error:
2775 return ret;
2776 }
2777
2778 /* lan743x_pcidev_probe - Device Initialization Routine
2779 * @pdev: PCI device information struct
2780 * @id: entry in lan743x_pci_tbl
2781 *
2782 * Returns 0 on success, negative on failure
2783 *
2784 * initializes an adapter identified by a pci_dev structure.
2785 * The OS initialization, configuring of the adapter private structure,
2786 * and a hardware reset occur.
2787 **/
lan743x_pcidev_probe(struct pci_dev * pdev,const struct pci_device_id * id)2788 static int lan743x_pcidev_probe(struct pci_dev *pdev,
2789 const struct pci_device_id *id)
2790 {
2791 struct lan743x_adapter *adapter = NULL;
2792 struct net_device *netdev = NULL;
2793 int ret = -ENODEV;
2794
2795 netdev = devm_alloc_etherdev(&pdev->dev,
2796 sizeof(struct lan743x_adapter));
2797 if (!netdev)
2798 goto return_error;
2799
2800 SET_NETDEV_DEV(netdev, &pdev->dev);
2801 pci_set_drvdata(pdev, netdev);
2802 adapter = netdev_priv(netdev);
2803 adapter->netdev = netdev;
2804 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
2805 NETIF_MSG_LINK | NETIF_MSG_IFUP |
2806 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
2807 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
2808
2809 of_get_mac_address(pdev->dev.of_node, adapter->mac_address);
2810
2811 ret = lan743x_pci_init(adapter, pdev);
2812 if (ret)
2813 goto return_error;
2814
2815 ret = lan743x_csr_init(adapter);
2816 if (ret)
2817 goto cleanup_pci;
2818
2819 ret = lan743x_hardware_init(adapter, pdev);
2820 if (ret)
2821 goto cleanup_pci;
2822
2823 ret = lan743x_mdiobus_init(adapter);
2824 if (ret)
2825 goto cleanup_hardware;
2826
2827 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
2828 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
2829 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
2830 adapter->netdev->hw_features = adapter->netdev->features;
2831
2832 /* carrier off reporting is important to ethtool even BEFORE open */
2833 netif_carrier_off(netdev);
2834
2835 ret = register_netdev(adapter->netdev);
2836 if (ret < 0)
2837 goto cleanup_mdiobus;
2838 return 0;
2839
2840 cleanup_mdiobus:
2841 lan743x_mdiobus_cleanup(adapter);
2842
2843 cleanup_hardware:
2844 lan743x_hardware_cleanup(adapter);
2845
2846 cleanup_pci:
2847 lan743x_pci_cleanup(adapter);
2848
2849 return_error:
2850 pr_warn("Initialization failed\n");
2851 return ret;
2852 }
2853
2854 /**
2855 * lan743x_pcidev_remove - Device Removal Routine
2856 * @pdev: PCI device information struct
2857 *
2858 * this is called by the PCI subsystem to alert the driver
2859 * that it should release a PCI device. This could be caused by a
2860 * Hot-Plug event, or because the driver is going to be removed from
2861 * memory.
2862 **/
lan743x_pcidev_remove(struct pci_dev * pdev)2863 static void lan743x_pcidev_remove(struct pci_dev *pdev)
2864 {
2865 struct net_device *netdev = pci_get_drvdata(pdev);
2866 struct lan743x_adapter *adapter = netdev_priv(netdev);
2867
2868 lan743x_full_cleanup(adapter);
2869 }
2870
lan743x_pcidev_shutdown(struct pci_dev * pdev)2871 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
2872 {
2873 struct net_device *netdev = pci_get_drvdata(pdev);
2874 struct lan743x_adapter *adapter = netdev_priv(netdev);
2875
2876 rtnl_lock();
2877 netif_device_detach(netdev);
2878
2879 /* close netdev when netdev is at running state.
2880 * For instance, it is true when system goes to sleep by pm-suspend
2881 * However, it is false when system goes to sleep by suspend GUI menu
2882 */
2883 if (netif_running(netdev))
2884 lan743x_netdev_close(netdev);
2885 rtnl_unlock();
2886
2887 #ifdef CONFIG_PM
2888 pci_save_state(pdev);
2889 #endif
2890
2891 /* clean up lan743x portion */
2892 lan743x_hardware_cleanup(adapter);
2893 }
2894
2895 #ifdef CONFIG_PM_SLEEP
lan743x_pm_wakeframe_crc16(const u8 * buf,int len)2896 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
2897 {
2898 return bitrev16(crc16(0xFFFF, buf, len));
2899 }
2900
lan743x_pm_set_wol(struct lan743x_adapter * adapter)2901 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
2902 {
2903 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
2904 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
2905 const u8 arp_type[2] = { 0x08, 0x06 };
2906 int mask_index;
2907 u32 pmtctl;
2908 u32 wucsr;
2909 u32 macrx;
2910 u16 crc;
2911
2912 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
2913 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
2914
2915 /* clear wake settings */
2916 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
2917 pmtctl |= PMT_CTL_WUPS_MASK_;
2918 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
2919 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
2920 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
2921
2922 macrx = lan743x_csr_read(adapter, MAC_RX);
2923
2924 wucsr = 0;
2925 mask_index = 0;
2926
2927 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
2928
2929 if (adapter->wolopts & WAKE_PHY) {
2930 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
2931 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
2932 }
2933 if (adapter->wolopts & WAKE_MAGIC) {
2934 wucsr |= MAC_WUCSR_MPEN_;
2935 macrx |= MAC_RX_RXEN_;
2936 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2937 }
2938 if (adapter->wolopts & WAKE_UCAST) {
2939 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
2940 macrx |= MAC_RX_RXEN_;
2941 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2942 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2943 }
2944 if (adapter->wolopts & WAKE_BCAST) {
2945 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
2946 macrx |= MAC_RX_RXEN_;
2947 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2948 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2949 }
2950 if (adapter->wolopts & WAKE_MCAST) {
2951 /* IPv4 multicast */
2952 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
2953 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2954 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2955 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2956 (crc & MAC_WUF_CFG_CRC16_MASK_));
2957 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
2958 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2959 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2960 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2961 mask_index++;
2962
2963 /* IPv6 multicast */
2964 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
2965 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2966 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
2967 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2968 (crc & MAC_WUF_CFG_CRC16_MASK_));
2969 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
2970 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2971 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2972 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2973 mask_index++;
2974
2975 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2976 macrx |= MAC_RX_RXEN_;
2977 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2978 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2979 }
2980 if (adapter->wolopts & WAKE_ARP) {
2981 /* set MAC_WUF_CFG & WUF_MASK
2982 * for packettype (offset 12,13) = ARP (0x0806)
2983 */
2984 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
2985 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
2986 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
2987 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
2988 (crc & MAC_WUF_CFG_CRC16_MASK_));
2989 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
2990 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
2991 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
2992 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
2993 mask_index++;
2994
2995 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
2996 macrx |= MAC_RX_RXEN_;
2997 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
2998 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
2999 }
3000
3001 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3002 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3003 lan743x_csr_write(adapter, MAC_RX, macrx);
3004 }
3005
lan743x_pm_suspend(struct device * dev)3006 static int lan743x_pm_suspend(struct device *dev)
3007 {
3008 struct pci_dev *pdev = to_pci_dev(dev);
3009 struct net_device *netdev = pci_get_drvdata(pdev);
3010 struct lan743x_adapter *adapter = netdev_priv(netdev);
3011
3012 lan743x_pcidev_shutdown(pdev);
3013
3014 /* clear all wakes */
3015 lan743x_csr_write(adapter, MAC_WUCSR, 0);
3016 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3017 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3018
3019 if (adapter->wolopts)
3020 lan743x_pm_set_wol(adapter);
3021
3022 /* Host sets PME_En, put D3hot */
3023 return pci_prepare_to_sleep(pdev);
3024 }
3025
lan743x_pm_resume(struct device * dev)3026 static int lan743x_pm_resume(struct device *dev)
3027 {
3028 struct pci_dev *pdev = to_pci_dev(dev);
3029 struct net_device *netdev = pci_get_drvdata(pdev);
3030 struct lan743x_adapter *adapter = netdev_priv(netdev);
3031 int ret;
3032
3033 pci_set_power_state(pdev, PCI_D0);
3034 pci_restore_state(pdev);
3035 pci_save_state(pdev);
3036
3037 ret = lan743x_hardware_init(adapter, pdev);
3038 if (ret) {
3039 netif_err(adapter, probe, adapter->netdev,
3040 "lan743x_hardware_init returned %d\n", ret);
3041 lan743x_pci_cleanup(adapter);
3042 return ret;
3043 }
3044
3045 /* open netdev when netdev is at running state while resume.
3046 * For instance, it is true when system wakesup after pm-suspend
3047 * However, it is false when system wakes up after suspend GUI menu
3048 */
3049 if (netif_running(netdev))
3050 lan743x_netdev_open(netdev);
3051
3052 netif_device_attach(netdev);
3053
3054 return 0;
3055 }
3056
3057 static const struct dev_pm_ops lan743x_pm_ops = {
3058 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3059 };
3060 #endif /* CONFIG_PM_SLEEP */
3061
3062 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3063 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3064 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3065 { 0, }
3066 };
3067
3068 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3069
3070 static struct pci_driver lan743x_pcidev_driver = {
3071 .name = DRIVER_NAME,
3072 .id_table = lan743x_pcidev_tbl,
3073 .probe = lan743x_pcidev_probe,
3074 .remove = lan743x_pcidev_remove,
3075 #ifdef CONFIG_PM_SLEEP
3076 .driver.pm = &lan743x_pm_ops,
3077 #endif
3078 .shutdown = lan743x_pcidev_shutdown,
3079 };
3080
3081 module_pci_driver(lan743x_pcidev_driver);
3082
3083 MODULE_AUTHOR(DRIVER_AUTHOR);
3084 MODULE_DESCRIPTION(DRIVER_DESC);
3085 MODULE_LICENSE("GPL");
3086