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
21 #define MMD_ACCESS_ADDRESS 0
22 #define MMD_ACCESS_WRITE 1
23 #define MMD_ACCESS_READ 2
24 #define MMD_ACCESS_READ_INC 3
25
pci11x1x_strap_get_status(struct lan743x_adapter * adapter)26 static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter)
27 {
28 u32 chip_rev;
29 u32 strap;
30
31 strap = lan743x_csr_read(adapter, STRAP_READ);
32 if (strap & STRAP_READ_USE_SGMII_EN_) {
33 if (strap & STRAP_READ_SGMII_EN_)
34 adapter->is_sgmii_en = true;
35 else
36 adapter->is_sgmii_en = false;
37 netif_dbg(adapter, drv, adapter->netdev,
38 "STRAP_READ: 0x%08X\n", strap);
39 } else {
40 chip_rev = lan743x_csr_read(adapter, FPGA_REV);
41 if (chip_rev) {
42 if (chip_rev & FPGA_SGMII_OP)
43 adapter->is_sgmii_en = true;
44 else
45 adapter->is_sgmii_en = false;
46 netif_dbg(adapter, drv, adapter->netdev,
47 "FPGA_REV: 0x%08X\n", chip_rev);
48 } else {
49 adapter->is_sgmii_en = false;
50 }
51 }
52 }
53
is_pci11x1x_chip(struct lan743x_adapter * adapter)54 static bool is_pci11x1x_chip(struct lan743x_adapter *adapter)
55 {
56 struct lan743x_csr *csr = &adapter->csr;
57 u32 id_rev = csr->id_rev;
58
59 if (((id_rev & 0xFFFF0000) == ID_REV_ID_A011_) ||
60 ((id_rev & 0xFFFF0000) == ID_REV_ID_A041_)) {
61 return true;
62 }
63 return false;
64 }
65
lan743x_pci_cleanup(struct lan743x_adapter * adapter)66 static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
67 {
68 pci_release_selected_regions(adapter->pdev,
69 pci_select_bars(adapter->pdev,
70 IORESOURCE_MEM));
71 pci_disable_device(adapter->pdev);
72 }
73
lan743x_pci_init(struct lan743x_adapter * adapter,struct pci_dev * pdev)74 static int lan743x_pci_init(struct lan743x_adapter *adapter,
75 struct pci_dev *pdev)
76 {
77 unsigned long bars = 0;
78 int ret;
79
80 adapter->pdev = pdev;
81 ret = pci_enable_device_mem(pdev);
82 if (ret)
83 goto return_error;
84
85 netif_info(adapter, probe, adapter->netdev,
86 "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
87 pdev->vendor, pdev->device);
88 bars = pci_select_bars(pdev, IORESOURCE_MEM);
89 if (!test_bit(0, &bars))
90 goto disable_device;
91
92 ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
93 if (ret)
94 goto disable_device;
95
96 pci_set_master(pdev);
97 return 0;
98
99 disable_device:
100 pci_disable_device(adapter->pdev);
101
102 return_error:
103 return ret;
104 }
105
lan743x_csr_read(struct lan743x_adapter * adapter,int offset)106 u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
107 {
108 return ioread32(&adapter->csr.csr_address[offset]);
109 }
110
lan743x_csr_write(struct lan743x_adapter * adapter,int offset,u32 data)111 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
112 u32 data)
113 {
114 iowrite32(data, &adapter->csr.csr_address[offset]);
115 }
116
117 #define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset)
118
lan743x_csr_light_reset(struct lan743x_adapter * adapter)119 static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
120 {
121 u32 data;
122
123 data = lan743x_csr_read(adapter, HW_CFG);
124 data |= HW_CFG_LRST_;
125 lan743x_csr_write(adapter, HW_CFG, data);
126
127 return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
128 !(data & HW_CFG_LRST_), 100000, 10000000);
129 }
130
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)131 static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
132 int offset, u32 bit_mask,
133 int target_value, int usleep_min,
134 int usleep_max, int count)
135 {
136 u32 data;
137
138 return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
139 target_value == ((data & bit_mask) ? 1 : 0),
140 usleep_max, usleep_min * count);
141 }
142
lan743x_csr_init(struct lan743x_adapter * adapter)143 static int lan743x_csr_init(struct lan743x_adapter *adapter)
144 {
145 struct lan743x_csr *csr = &adapter->csr;
146 resource_size_t bar_start, bar_length;
147 int result;
148
149 bar_start = pci_resource_start(adapter->pdev, 0);
150 bar_length = pci_resource_len(adapter->pdev, 0);
151 csr->csr_address = devm_ioremap(&adapter->pdev->dev,
152 bar_start, bar_length);
153 if (!csr->csr_address) {
154 result = -ENOMEM;
155 goto clean_up;
156 }
157
158 csr->id_rev = lan743x_csr_read(adapter, ID_REV);
159 csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
160 netif_info(adapter, probe, adapter->netdev,
161 "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
162 csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
163 FPGA_REV_GET_MINOR_(csr->fpga_rev));
164 if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
165 result = -ENODEV;
166 goto clean_up;
167 }
168
169 csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
170 switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
171 case ID_REV_CHIP_REV_A0_:
172 csr->flags |= LAN743X_CSR_FLAG_IS_A0;
173 csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
174 break;
175 case ID_REV_CHIP_REV_B0_:
176 csr->flags |= LAN743X_CSR_FLAG_IS_B0;
177 break;
178 }
179
180 result = lan743x_csr_light_reset(adapter);
181 if (result)
182 goto clean_up;
183 return 0;
184 clean_up:
185 return result;
186 }
187
lan743x_intr_software_isr(struct lan743x_adapter * adapter)188 static void lan743x_intr_software_isr(struct lan743x_adapter *adapter)
189 {
190 struct lan743x_intr *intr = &adapter->intr;
191
192 /* disable the interrupt to prevent repeated re-triggering */
193 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
194 intr->software_isr_flag = true;
195 wake_up(&intr->software_isr_wq);
196 }
197
lan743x_tx_isr(void * context,u32 int_sts,u32 flags)198 static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
199 {
200 struct lan743x_tx *tx = context;
201 struct lan743x_adapter *adapter = tx->adapter;
202 bool enable_flag = true;
203
204 lan743x_csr_read(adapter, INT_EN_SET);
205 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
206 lan743x_csr_write(adapter, INT_EN_CLR,
207 INT_BIT_DMA_TX_(tx->channel_number));
208 }
209
210 if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
211 u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
212 u32 dmac_int_sts;
213 u32 dmac_int_en;
214
215 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
216 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
217 else
218 dmac_int_sts = ioc_bit;
219 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
220 dmac_int_en = lan743x_csr_read(adapter,
221 DMAC_INT_EN_SET);
222 else
223 dmac_int_en = ioc_bit;
224
225 dmac_int_en &= ioc_bit;
226 dmac_int_sts &= dmac_int_en;
227 if (dmac_int_sts & ioc_bit) {
228 napi_schedule(&tx->napi);
229 enable_flag = false;/* poll func will enable later */
230 }
231 }
232
233 if (enable_flag)
234 /* enable isr */
235 lan743x_csr_write(adapter, INT_EN_SET,
236 INT_BIT_DMA_TX_(tx->channel_number));
237 }
238
lan743x_rx_isr(void * context,u32 int_sts,u32 flags)239 static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
240 {
241 struct lan743x_rx *rx = context;
242 struct lan743x_adapter *adapter = rx->adapter;
243 bool enable_flag = true;
244
245 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
246 lan743x_csr_write(adapter, INT_EN_CLR,
247 INT_BIT_DMA_RX_(rx->channel_number));
248 }
249
250 if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
251 u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
252 u32 dmac_int_sts;
253 u32 dmac_int_en;
254
255 if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
256 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
257 else
258 dmac_int_sts = rx_frame_bit;
259 if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
260 dmac_int_en = lan743x_csr_read(adapter,
261 DMAC_INT_EN_SET);
262 else
263 dmac_int_en = rx_frame_bit;
264
265 dmac_int_en &= rx_frame_bit;
266 dmac_int_sts &= dmac_int_en;
267 if (dmac_int_sts & rx_frame_bit) {
268 napi_schedule(&rx->napi);
269 enable_flag = false;/* poll funct will enable later */
270 }
271 }
272
273 if (enable_flag) {
274 /* enable isr */
275 lan743x_csr_write(adapter, INT_EN_SET,
276 INT_BIT_DMA_RX_(rx->channel_number));
277 }
278 }
279
lan743x_intr_shared_isr(void * context,u32 int_sts,u32 flags)280 static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
281 {
282 struct lan743x_adapter *adapter = context;
283 unsigned int channel;
284
285 if (int_sts & INT_BIT_ALL_RX_) {
286 for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
287 channel++) {
288 u32 int_bit = INT_BIT_DMA_RX_(channel);
289
290 if (int_sts & int_bit) {
291 lan743x_rx_isr(&adapter->rx[channel],
292 int_bit, flags);
293 int_sts &= ~int_bit;
294 }
295 }
296 }
297 if (int_sts & INT_BIT_ALL_TX_) {
298 for (channel = 0; channel < adapter->used_tx_channels;
299 channel++) {
300 u32 int_bit = INT_BIT_DMA_TX_(channel);
301
302 if (int_sts & int_bit) {
303 lan743x_tx_isr(&adapter->tx[channel],
304 int_bit, flags);
305 int_sts &= ~int_bit;
306 }
307 }
308 }
309 if (int_sts & INT_BIT_ALL_OTHER_) {
310 if (int_sts & INT_BIT_SW_GP_) {
311 lan743x_intr_software_isr(adapter);
312 int_sts &= ~INT_BIT_SW_GP_;
313 }
314 if (int_sts & INT_BIT_1588_) {
315 lan743x_ptp_isr(adapter);
316 int_sts &= ~INT_BIT_1588_;
317 }
318 }
319 if (int_sts)
320 lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
321 }
322
lan743x_intr_entry_isr(int irq,void * ptr)323 static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
324 {
325 struct lan743x_vector *vector = ptr;
326 struct lan743x_adapter *adapter = vector->adapter;
327 irqreturn_t result = IRQ_NONE;
328 u32 int_enables;
329 u32 int_sts;
330
331 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
332 int_sts = lan743x_csr_read(adapter, INT_STS);
333 } else if (vector->flags &
334 (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
335 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
336 int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
337 } else {
338 /* use mask as implied status */
339 int_sts = vector->int_mask | INT_BIT_MAS_;
340 }
341
342 if (!(int_sts & INT_BIT_MAS_))
343 goto irq_done;
344
345 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
346 /* disable vector interrupt */
347 lan743x_csr_write(adapter,
348 INT_VEC_EN_CLR,
349 INT_VEC_EN_(vector->vector_index));
350
351 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
352 /* disable master interrupt */
353 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
354
355 if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
356 int_enables = lan743x_csr_read(adapter, INT_EN_SET);
357 } else {
358 /* use vector mask as implied enable mask */
359 int_enables = vector->int_mask;
360 }
361
362 int_sts &= int_enables;
363 int_sts &= vector->int_mask;
364 if (int_sts) {
365 if (vector->handler) {
366 vector->handler(vector->context,
367 int_sts, vector->flags);
368 } else {
369 /* disable interrupts on this vector */
370 lan743x_csr_write(adapter, INT_EN_CLR,
371 vector->int_mask);
372 }
373 result = IRQ_HANDLED;
374 }
375
376 if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
377 /* enable master interrupt */
378 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
379
380 if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
381 /* enable vector interrupt */
382 lan743x_csr_write(adapter,
383 INT_VEC_EN_SET,
384 INT_VEC_EN_(vector->vector_index));
385 irq_done:
386 return result;
387 }
388
lan743x_intr_test_isr(struct lan743x_adapter * adapter)389 static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
390 {
391 struct lan743x_intr *intr = &adapter->intr;
392 int ret;
393
394 intr->software_isr_flag = false;
395
396 /* enable and activate test interrupt */
397 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
398 lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
399
400 ret = wait_event_timeout(intr->software_isr_wq,
401 intr->software_isr_flag,
402 msecs_to_jiffies(200));
403
404 /* disable test interrupt */
405 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
406
407 return ret > 0 ? 0 : -ENODEV;
408 }
409
lan743x_intr_register_isr(struct lan743x_adapter * adapter,int vector_index,u32 flags,u32 int_mask,lan743x_vector_handler handler,void * context)410 static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
411 int vector_index, u32 flags,
412 u32 int_mask,
413 lan743x_vector_handler handler,
414 void *context)
415 {
416 struct lan743x_vector *vector = &adapter->intr.vector_list
417 [vector_index];
418 int ret;
419
420 vector->adapter = adapter;
421 vector->flags = flags;
422 vector->vector_index = vector_index;
423 vector->int_mask = int_mask;
424 vector->handler = handler;
425 vector->context = context;
426
427 ret = request_irq(vector->irq,
428 lan743x_intr_entry_isr,
429 (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
430 IRQF_SHARED : 0, DRIVER_NAME, vector);
431 if (ret) {
432 vector->handler = NULL;
433 vector->context = NULL;
434 vector->int_mask = 0;
435 vector->flags = 0;
436 }
437 return ret;
438 }
439
lan743x_intr_unregister_isr(struct lan743x_adapter * adapter,int vector_index)440 static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
441 int vector_index)
442 {
443 struct lan743x_vector *vector = &adapter->intr.vector_list
444 [vector_index];
445
446 free_irq(vector->irq, vector);
447 vector->handler = NULL;
448 vector->context = NULL;
449 vector->int_mask = 0;
450 vector->flags = 0;
451 }
452
lan743x_intr_get_vector_flags(struct lan743x_adapter * adapter,u32 int_mask)453 static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
454 u32 int_mask)
455 {
456 int index;
457
458 for (index = 0; index < adapter->max_vector_count; index++) {
459 if (adapter->intr.vector_list[index].int_mask & int_mask)
460 return adapter->intr.vector_list[index].flags;
461 }
462 return 0;
463 }
464
lan743x_intr_close(struct lan743x_adapter * adapter)465 static void lan743x_intr_close(struct lan743x_adapter *adapter)
466 {
467 struct lan743x_intr *intr = &adapter->intr;
468 int index = 0;
469
470 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
471 if (adapter->is_pci11x1x)
472 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x0000FFFF);
473 else
474 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
475
476 for (index = 0; index < intr->number_of_vectors; index++) {
477 if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
478 lan743x_intr_unregister_isr(adapter, index);
479 intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
480 }
481 }
482
483 if (intr->flags & INTR_FLAG_MSI_ENABLED) {
484 pci_disable_msi(adapter->pdev);
485 intr->flags &= ~INTR_FLAG_MSI_ENABLED;
486 }
487
488 if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
489 pci_disable_msix(adapter->pdev);
490 intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
491 }
492 }
493
lan743x_intr_open(struct lan743x_adapter * adapter)494 static int lan743x_intr_open(struct lan743x_adapter *adapter)
495 {
496 struct msix_entry msix_entries[PCI11X1X_MAX_VECTOR_COUNT];
497 struct lan743x_intr *intr = &adapter->intr;
498 unsigned int used_tx_channels;
499 u32 int_vec_en_auto_clr = 0;
500 u8 max_vector_count;
501 u32 int_vec_map0 = 0;
502 u32 int_vec_map1 = 0;
503 int ret = -ENODEV;
504 int index = 0;
505 u32 flags = 0;
506
507 intr->number_of_vectors = 0;
508
509 /* Try to set up MSIX interrupts */
510 max_vector_count = adapter->max_vector_count;
511 memset(&msix_entries[0], 0,
512 sizeof(struct msix_entry) * max_vector_count);
513 for (index = 0; index < max_vector_count; index++)
514 msix_entries[index].entry = index;
515 used_tx_channels = adapter->used_tx_channels;
516 ret = pci_enable_msix_range(adapter->pdev,
517 msix_entries, 1,
518 1 + used_tx_channels +
519 LAN743X_USED_RX_CHANNELS);
520
521 if (ret > 0) {
522 intr->flags |= INTR_FLAG_MSIX_ENABLED;
523 intr->number_of_vectors = ret;
524 intr->using_vectors = true;
525 for (index = 0; index < intr->number_of_vectors; index++)
526 intr->vector_list[index].irq = msix_entries
527 [index].vector;
528 netif_info(adapter, ifup, adapter->netdev,
529 "using MSIX interrupts, number of vectors = %d\n",
530 intr->number_of_vectors);
531 }
532
533 /* If MSIX failed try to setup using MSI interrupts */
534 if (!intr->number_of_vectors) {
535 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
536 if (!pci_enable_msi(adapter->pdev)) {
537 intr->flags |= INTR_FLAG_MSI_ENABLED;
538 intr->number_of_vectors = 1;
539 intr->using_vectors = true;
540 intr->vector_list[0].irq =
541 adapter->pdev->irq;
542 netif_info(adapter, ifup, adapter->netdev,
543 "using MSI interrupts, number of vectors = %d\n",
544 intr->number_of_vectors);
545 }
546 }
547 }
548
549 /* If MSIX, and MSI failed, setup using legacy interrupt */
550 if (!intr->number_of_vectors) {
551 intr->number_of_vectors = 1;
552 intr->using_vectors = false;
553 intr->vector_list[0].irq = intr->irq;
554 netif_info(adapter, ifup, adapter->netdev,
555 "using legacy interrupts\n");
556 }
557
558 /* At this point we must have at least one irq */
559 lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
560
561 /* map all interrupts to vector 0 */
562 lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
563 lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
564 lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
565 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
566 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
567 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
568 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
569
570 if (intr->using_vectors) {
571 flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
572 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
573 } else {
574 flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
575 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
576 LAN743X_VECTOR_FLAG_IRQ_SHARED;
577 }
578
579 if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
580 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
581 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
582 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
583 flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
584 flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
585 flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
586 }
587
588 init_waitqueue_head(&intr->software_isr_wq);
589
590 ret = lan743x_intr_register_isr(adapter, 0, flags,
591 INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
592 INT_BIT_ALL_OTHER_,
593 lan743x_intr_shared_isr, adapter);
594 if (ret)
595 goto clean_up;
596 intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
597
598 if (intr->using_vectors)
599 lan743x_csr_write(adapter, INT_VEC_EN_SET,
600 INT_VEC_EN_(0));
601
602 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
603 lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
604 lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
605 lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
606 lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
607 lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
608 lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
609 lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
610 lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
611 if (adapter->is_pci11x1x) {
612 lan743x_csr_write(adapter, INT_MOD_CFG8, LAN743X_INT_MOD);
613 lan743x_csr_write(adapter, INT_MOD_CFG9, LAN743X_INT_MOD);
614 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00007654);
615 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00003210);
616 } else {
617 lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
618 lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
619 }
620 lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
621 }
622
623 /* enable interrupts */
624 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
625 ret = lan743x_intr_test_isr(adapter);
626 if (ret)
627 goto clean_up;
628
629 if (intr->number_of_vectors > 1) {
630 int number_of_tx_vectors = intr->number_of_vectors - 1;
631
632 if (number_of_tx_vectors > used_tx_channels)
633 number_of_tx_vectors = used_tx_channels;
634 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
635 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
636 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
637 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
638 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
639 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
640
641 if (adapter->csr.flags &
642 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
643 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
644 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
645 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
646 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
647 }
648
649 for (index = 0; index < number_of_tx_vectors; index++) {
650 u32 int_bit = INT_BIT_DMA_TX_(index);
651 int vector = index + 1;
652
653 /* map TX interrupt to vector */
654 int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
655 lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
656
657 /* Remove TX interrupt from shared mask */
658 intr->vector_list[0].int_mask &= ~int_bit;
659 ret = lan743x_intr_register_isr(adapter, vector, flags,
660 int_bit, lan743x_tx_isr,
661 &adapter->tx[index]);
662 if (ret)
663 goto clean_up;
664 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
665 if (!(flags &
666 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
667 lan743x_csr_write(adapter, INT_VEC_EN_SET,
668 INT_VEC_EN_(vector));
669 }
670 }
671 if ((intr->number_of_vectors - used_tx_channels) > 1) {
672 int number_of_rx_vectors = intr->number_of_vectors -
673 used_tx_channels - 1;
674
675 if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
676 number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
677
678 flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
679 LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
680 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
681 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
682 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
683 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
684
685 if (adapter->csr.flags &
686 LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
687 flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
688 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
689 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
690 LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
691 LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
692 }
693 for (index = 0; index < number_of_rx_vectors; index++) {
694 int vector = index + 1 + used_tx_channels;
695 u32 int_bit = INT_BIT_DMA_RX_(index);
696
697 /* map RX interrupt to vector */
698 int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
699 lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
700 if (flags &
701 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
702 int_vec_en_auto_clr |= INT_VEC_EN_(vector);
703 lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
704 int_vec_en_auto_clr);
705 }
706
707 /* Remove RX interrupt from shared mask */
708 intr->vector_list[0].int_mask &= ~int_bit;
709 ret = lan743x_intr_register_isr(adapter, vector, flags,
710 int_bit, lan743x_rx_isr,
711 &adapter->rx[index]);
712 if (ret)
713 goto clean_up;
714 intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
715
716 lan743x_csr_write(adapter, INT_VEC_EN_SET,
717 INT_VEC_EN_(vector));
718 }
719 }
720 return 0;
721
722 clean_up:
723 lan743x_intr_close(adapter);
724 return ret;
725 }
726
lan743x_dp_write(struct lan743x_adapter * adapter,u32 select,u32 addr,u32 length,u32 * buf)727 static int lan743x_dp_write(struct lan743x_adapter *adapter,
728 u32 select, u32 addr, u32 length, u32 *buf)
729 {
730 u32 dp_sel;
731 int i;
732
733 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
734 1, 40, 100, 100))
735 return -EIO;
736 dp_sel = lan743x_csr_read(adapter, DP_SEL);
737 dp_sel &= ~DP_SEL_MASK_;
738 dp_sel |= select;
739 lan743x_csr_write(adapter, DP_SEL, dp_sel);
740
741 for (i = 0; i < length; i++) {
742 lan743x_csr_write(adapter, DP_ADDR, addr + i);
743 lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
744 lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
745 if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
746 1, 40, 100, 100))
747 return -EIO;
748 }
749
750 return 0;
751 }
752
lan743x_mac_mii_access(u16 id,u16 index,int read)753 static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
754 {
755 u32 ret;
756
757 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
758 MAC_MII_ACC_PHY_ADDR_MASK_;
759 ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
760 MAC_MII_ACC_MIIRINDA_MASK_;
761
762 if (read)
763 ret |= MAC_MII_ACC_MII_READ_;
764 else
765 ret |= MAC_MII_ACC_MII_WRITE_;
766 ret |= MAC_MII_ACC_MII_BUSY_;
767
768 return ret;
769 }
770
lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter * adapter)771 static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
772 {
773 u32 data;
774
775 return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
776 !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
777 }
778
lan743x_mdiobus_read(struct mii_bus * bus,int phy_id,int index)779 static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
780 {
781 struct lan743x_adapter *adapter = bus->priv;
782 u32 val, mii_access;
783 int ret;
784
785 /* comfirm MII not busy */
786 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
787 if (ret < 0)
788 return ret;
789
790 /* set the address, index & direction (read from PHY) */
791 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
792 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
793 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
794 if (ret < 0)
795 return ret;
796
797 val = lan743x_csr_read(adapter, MAC_MII_DATA);
798 return (int)(val & 0xFFFF);
799 }
800
lan743x_mdiobus_write(struct mii_bus * bus,int phy_id,int index,u16 regval)801 static int lan743x_mdiobus_write(struct mii_bus *bus,
802 int phy_id, int index, u16 regval)
803 {
804 struct lan743x_adapter *adapter = bus->priv;
805 u32 val, mii_access;
806 int ret;
807
808 /* confirm MII not busy */
809 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
810 if (ret < 0)
811 return ret;
812 val = (u32)regval;
813 lan743x_csr_write(adapter, MAC_MII_DATA, val);
814
815 /* set the address, index & direction (write to PHY) */
816 mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
817 lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
818 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
819 return ret;
820 }
821
lan743x_mac_mmd_access(int id,int index,int op)822 static u32 lan743x_mac_mmd_access(int id, int index, int op)
823 {
824 u16 dev_addr;
825 u32 ret;
826
827 dev_addr = (index >> 16) & 0x1f;
828 ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
829 MAC_MII_ACC_PHY_ADDR_MASK_;
830 ret |= (dev_addr << MAC_MII_ACC_MIIMMD_SHIFT_) &
831 MAC_MII_ACC_MIIMMD_MASK_;
832 if (op == MMD_ACCESS_WRITE)
833 ret |= MAC_MII_ACC_MIICMD_WRITE_;
834 else if (op == MMD_ACCESS_READ)
835 ret |= MAC_MII_ACC_MIICMD_READ_;
836 else if (op == MMD_ACCESS_READ_INC)
837 ret |= MAC_MII_ACC_MIICMD_READ_INC_;
838 else
839 ret |= MAC_MII_ACC_MIICMD_ADDR_;
840 ret |= (MAC_MII_ACC_MII_BUSY_ | MAC_MII_ACC_MIICL45_);
841
842 return ret;
843 }
844
lan743x_mdiobus_c45_read(struct mii_bus * bus,int phy_id,int index)845 static int lan743x_mdiobus_c45_read(struct mii_bus *bus, int phy_id, int index)
846 {
847 struct lan743x_adapter *adapter = bus->priv;
848 u32 mmd_access;
849 int ret;
850
851 /* comfirm MII not busy */
852 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
853 if (ret < 0)
854 return ret;
855 if (index & MII_ADDR_C45) {
856 /* Load Register Address */
857 lan743x_csr_write(adapter, MAC_MII_DATA, (u32)(index & 0xffff));
858 mmd_access = lan743x_mac_mmd_access(phy_id, index,
859 MMD_ACCESS_ADDRESS);
860 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
861 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
862 if (ret < 0)
863 return ret;
864 /* Read Data */
865 mmd_access = lan743x_mac_mmd_access(phy_id, index,
866 MMD_ACCESS_READ);
867 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
868 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
869 if (ret < 0)
870 return ret;
871 ret = lan743x_csr_read(adapter, MAC_MII_DATA);
872 return (int)(ret & 0xFFFF);
873 }
874
875 ret = lan743x_mdiobus_read(bus, phy_id, index);
876 return ret;
877 }
878
lan743x_mdiobus_c45_write(struct mii_bus * bus,int phy_id,int index,u16 regval)879 static int lan743x_mdiobus_c45_write(struct mii_bus *bus,
880 int phy_id, int index, u16 regval)
881 {
882 struct lan743x_adapter *adapter = bus->priv;
883 u32 mmd_access;
884 int ret;
885
886 /* confirm MII not busy */
887 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
888 if (ret < 0)
889 return ret;
890 if (index & MII_ADDR_C45) {
891 /* Load Register Address */
892 lan743x_csr_write(adapter, MAC_MII_DATA, (u32)(index & 0xffff));
893 mmd_access = lan743x_mac_mmd_access(phy_id, index,
894 MMD_ACCESS_ADDRESS);
895 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
896 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
897 if (ret < 0)
898 return ret;
899 /* Write Data */
900 lan743x_csr_write(adapter, MAC_MII_DATA, (u32)regval);
901 mmd_access = lan743x_mac_mmd_access(phy_id, index,
902 MMD_ACCESS_WRITE);
903 lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access);
904 ret = lan743x_mac_mii_wait_till_not_busy(adapter);
905 } else {
906 ret = lan743x_mdiobus_write(bus, phy_id, index, regval);
907 }
908
909 return ret;
910 }
911
lan743x_mac_set_address(struct lan743x_adapter * adapter,u8 * addr)912 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
913 u8 *addr)
914 {
915 u32 addr_lo, addr_hi;
916
917 addr_lo = addr[0] |
918 addr[1] << 8 |
919 addr[2] << 16 |
920 addr[3] << 24;
921 addr_hi = addr[4] |
922 addr[5] << 8;
923 lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
924 lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
925
926 ether_addr_copy(adapter->mac_address, addr);
927 netif_info(adapter, drv, adapter->netdev,
928 "MAC address set to %pM\n", addr);
929 }
930
lan743x_mac_init(struct lan743x_adapter * adapter)931 static int lan743x_mac_init(struct lan743x_adapter *adapter)
932 {
933 bool mac_address_valid = true;
934 struct net_device *netdev;
935 u32 mac_addr_hi = 0;
936 u32 mac_addr_lo = 0;
937 u32 data;
938
939 netdev = adapter->netdev;
940
941 /* disable auto duplex, and speed detection. Phylib does that */
942 data = lan743x_csr_read(adapter, MAC_CR);
943 data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
944 data |= MAC_CR_CNTR_RST_;
945 lan743x_csr_write(adapter, MAC_CR, data);
946
947 if (!is_valid_ether_addr(adapter->mac_address)) {
948 mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
949 mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
950 adapter->mac_address[0] = mac_addr_lo & 0xFF;
951 adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
952 adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
953 adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
954 adapter->mac_address[4] = mac_addr_hi & 0xFF;
955 adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
956
957 if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
958 mac_addr_lo == 0xFFFFFFFF) {
959 mac_address_valid = false;
960 } else if (!is_valid_ether_addr(adapter->mac_address)) {
961 mac_address_valid = false;
962 }
963
964 if (!mac_address_valid)
965 eth_random_addr(adapter->mac_address);
966 }
967 lan743x_mac_set_address(adapter, adapter->mac_address);
968 eth_hw_addr_set(netdev, adapter->mac_address);
969
970 return 0;
971 }
972
lan743x_mac_open(struct lan743x_adapter * adapter)973 static int lan743x_mac_open(struct lan743x_adapter *adapter)
974 {
975 u32 temp;
976
977 temp = lan743x_csr_read(adapter, MAC_RX);
978 lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
979 temp = lan743x_csr_read(adapter, MAC_TX);
980 lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
981 return 0;
982 }
983
lan743x_mac_close(struct lan743x_adapter * adapter)984 static void lan743x_mac_close(struct lan743x_adapter *adapter)
985 {
986 u32 temp;
987
988 temp = lan743x_csr_read(adapter, MAC_TX);
989 temp &= ~MAC_TX_TXEN_;
990 lan743x_csr_write(adapter, MAC_TX, temp);
991 lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
992 1, 1000, 20000, 100);
993
994 temp = lan743x_csr_read(adapter, MAC_RX);
995 temp &= ~MAC_RX_RXEN_;
996 lan743x_csr_write(adapter, MAC_RX, temp);
997 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
998 1, 1000, 20000, 100);
999 }
1000
lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter * adapter,bool tx_enable,bool rx_enable)1001 static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
1002 bool tx_enable, bool rx_enable)
1003 {
1004 u32 flow_setting = 0;
1005
1006 /* set maximum pause time because when fifo space frees
1007 * up a zero value pause frame will be sent to release the pause
1008 */
1009 flow_setting = MAC_FLOW_CR_FCPT_MASK_;
1010 if (tx_enable)
1011 flow_setting |= MAC_FLOW_CR_TX_FCEN_;
1012 if (rx_enable)
1013 flow_setting |= MAC_FLOW_CR_RX_FCEN_;
1014 lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
1015 }
1016
lan743x_mac_set_mtu(struct lan743x_adapter * adapter,int new_mtu)1017 static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
1018 {
1019 int enabled = 0;
1020 u32 mac_rx = 0;
1021
1022 mac_rx = lan743x_csr_read(adapter, MAC_RX);
1023 if (mac_rx & MAC_RX_RXEN_) {
1024 enabled = 1;
1025 if (mac_rx & MAC_RX_RXD_) {
1026 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1027 mac_rx &= ~MAC_RX_RXD_;
1028 }
1029 mac_rx &= ~MAC_RX_RXEN_;
1030 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1031 lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
1032 1, 1000, 20000, 100);
1033 lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
1034 }
1035
1036 mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
1037 mac_rx |= (((new_mtu + ETH_HLEN + ETH_FCS_LEN)
1038 << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
1039 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1040
1041 if (enabled) {
1042 mac_rx |= MAC_RX_RXEN_;
1043 lan743x_csr_write(adapter, MAC_RX, mac_rx);
1044 }
1045 return 0;
1046 }
1047
1048 /* PHY */
lan743x_phy_reset(struct lan743x_adapter * adapter)1049 static int lan743x_phy_reset(struct lan743x_adapter *adapter)
1050 {
1051 u32 data;
1052
1053 /* Only called with in probe, and before mdiobus_register */
1054
1055 data = lan743x_csr_read(adapter, PMT_CTL);
1056 data |= PMT_CTL_ETH_PHY_RST_;
1057 lan743x_csr_write(adapter, PMT_CTL, data);
1058
1059 return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
1060 (!(data & PMT_CTL_ETH_PHY_RST_) &&
1061 (data & PMT_CTL_READY_)),
1062 50000, 1000000);
1063 }
1064
lan743x_phy_update_flowcontrol(struct lan743x_adapter * adapter,u16 local_adv,u16 remote_adv)1065 static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
1066 u16 local_adv, u16 remote_adv)
1067 {
1068 struct lan743x_phy *phy = &adapter->phy;
1069 u8 cap;
1070
1071 if (phy->fc_autoneg)
1072 cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
1073 else
1074 cap = phy->fc_request_control;
1075
1076 lan743x_mac_flow_ctrl_set_enables(adapter,
1077 cap & FLOW_CTRL_TX,
1078 cap & FLOW_CTRL_RX);
1079 }
1080
lan743x_phy_init(struct lan743x_adapter * adapter)1081 static int lan743x_phy_init(struct lan743x_adapter *adapter)
1082 {
1083 return lan743x_phy_reset(adapter);
1084 }
1085
lan743x_phy_link_status_change(struct net_device * netdev)1086 static void lan743x_phy_link_status_change(struct net_device *netdev)
1087 {
1088 struct lan743x_adapter *adapter = netdev_priv(netdev);
1089 struct phy_device *phydev = netdev->phydev;
1090 u32 data;
1091
1092 phy_print_status(phydev);
1093 if (phydev->state == PHY_RUNNING) {
1094 int remote_advertisement = 0;
1095 int local_advertisement = 0;
1096
1097 data = lan743x_csr_read(adapter, MAC_CR);
1098
1099 /* set interface mode */
1100 if (phy_interface_is_rgmii(phydev))
1101 /* RGMII */
1102 data &= ~MAC_CR_MII_EN_;
1103 else
1104 /* GMII */
1105 data |= MAC_CR_MII_EN_;
1106
1107 /* set duplex mode */
1108 if (phydev->duplex)
1109 data |= MAC_CR_DPX_;
1110 else
1111 data &= ~MAC_CR_DPX_;
1112
1113 /* set bus speed */
1114 switch (phydev->speed) {
1115 case SPEED_10:
1116 data &= ~MAC_CR_CFG_H_;
1117 data &= ~MAC_CR_CFG_L_;
1118 break;
1119 case SPEED_100:
1120 data &= ~MAC_CR_CFG_H_;
1121 data |= MAC_CR_CFG_L_;
1122 break;
1123 case SPEED_1000:
1124 data |= MAC_CR_CFG_H_;
1125 data &= ~MAC_CR_CFG_L_;
1126 break;
1127 }
1128 lan743x_csr_write(adapter, MAC_CR, data);
1129
1130 local_advertisement =
1131 linkmode_adv_to_mii_adv_t(phydev->advertising);
1132 remote_advertisement =
1133 linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
1134
1135 lan743x_phy_update_flowcontrol(adapter, local_advertisement,
1136 remote_advertisement);
1137 lan743x_ptp_update_latency(adapter, phydev->speed);
1138 }
1139 }
1140
lan743x_phy_close(struct lan743x_adapter * adapter)1141 static void lan743x_phy_close(struct lan743x_adapter *adapter)
1142 {
1143 struct net_device *netdev = adapter->netdev;
1144
1145 phy_stop(netdev->phydev);
1146 phy_disconnect(netdev->phydev);
1147 netdev->phydev = NULL;
1148 }
1149
lan743x_phy_open(struct lan743x_adapter * adapter)1150 static int lan743x_phy_open(struct lan743x_adapter *adapter)
1151 {
1152 struct net_device *netdev = adapter->netdev;
1153 struct lan743x_phy *phy = &adapter->phy;
1154 struct phy_device *phydev;
1155 int ret = -EIO;
1156
1157 /* try devicetree phy, or fixed link */
1158 phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
1159 lan743x_phy_link_status_change);
1160
1161 if (!phydev) {
1162 /* try internal phy */
1163 phydev = phy_find_first(adapter->mdiobus);
1164 if (!phydev)
1165 goto return_error;
1166
1167 if (adapter->is_pci11x1x)
1168 ret = phy_connect_direct(netdev, phydev,
1169 lan743x_phy_link_status_change,
1170 PHY_INTERFACE_MODE_RGMII);
1171 else
1172 ret = phy_connect_direct(netdev, phydev,
1173 lan743x_phy_link_status_change,
1174 PHY_INTERFACE_MODE_GMII);
1175 if (ret)
1176 goto return_error;
1177 }
1178
1179 /* MAC doesn't support 1000T Half */
1180 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1181
1182 /* support both flow controls */
1183 phy_support_asym_pause(phydev);
1184 phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
1185 phy->fc_autoneg = phydev->autoneg;
1186
1187 phy_start(phydev);
1188 phy_start_aneg(phydev);
1189 phy_attached_info(phydev);
1190 return 0;
1191
1192 return_error:
1193 return ret;
1194 }
1195
lan743x_rfe_open(struct lan743x_adapter * adapter)1196 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
1197 {
1198 lan743x_csr_write(adapter, RFE_RSS_CFG,
1199 RFE_RSS_CFG_UDP_IPV6_EX_ |
1200 RFE_RSS_CFG_TCP_IPV6_EX_ |
1201 RFE_RSS_CFG_IPV6_EX_ |
1202 RFE_RSS_CFG_UDP_IPV6_ |
1203 RFE_RSS_CFG_TCP_IPV6_ |
1204 RFE_RSS_CFG_IPV6_ |
1205 RFE_RSS_CFG_UDP_IPV4_ |
1206 RFE_RSS_CFG_TCP_IPV4_ |
1207 RFE_RSS_CFG_IPV4_ |
1208 RFE_RSS_CFG_VALID_HASH_BITS_ |
1209 RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
1210 RFE_RSS_CFG_RSS_HASH_STORE_ |
1211 RFE_RSS_CFG_RSS_ENABLE_);
1212 }
1213
lan743x_rfe_update_mac_address(struct lan743x_adapter * adapter)1214 static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
1215 {
1216 u8 *mac_addr;
1217 u32 mac_addr_hi = 0;
1218 u32 mac_addr_lo = 0;
1219
1220 /* Add mac address to perfect Filter */
1221 mac_addr = adapter->mac_address;
1222 mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
1223 (((u32)(mac_addr[1])) << 8) |
1224 (((u32)(mac_addr[2])) << 16) |
1225 (((u32)(mac_addr[3])) << 24));
1226 mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
1227 (((u32)(mac_addr[5])) << 8));
1228
1229 lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
1230 lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
1231 mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
1232 }
1233
lan743x_rfe_set_multicast(struct lan743x_adapter * adapter)1234 static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
1235 {
1236 struct net_device *netdev = adapter->netdev;
1237 u32 hash_table[DP_SEL_VHF_HASH_LEN];
1238 u32 rfctl;
1239 u32 data;
1240
1241 rfctl = lan743x_csr_read(adapter, RFE_CTL);
1242 rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
1243 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
1244 rfctl |= RFE_CTL_AB_;
1245 if (netdev->flags & IFF_PROMISC) {
1246 rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
1247 } else {
1248 if (netdev->flags & IFF_ALLMULTI)
1249 rfctl |= RFE_CTL_AM_;
1250 }
1251
1252 memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
1253 if (netdev_mc_count(netdev)) {
1254 struct netdev_hw_addr *ha;
1255 int i;
1256
1257 rfctl |= RFE_CTL_DA_PERFECT_;
1258 i = 1;
1259 netdev_for_each_mc_addr(ha, netdev) {
1260 /* set first 32 into Perfect Filter */
1261 if (i < 33) {
1262 lan743x_csr_write(adapter,
1263 RFE_ADDR_FILT_HI(i), 0);
1264 data = ha->addr[3];
1265 data = ha->addr[2] | (data << 8);
1266 data = ha->addr[1] | (data << 8);
1267 data = ha->addr[0] | (data << 8);
1268 lan743x_csr_write(adapter,
1269 RFE_ADDR_FILT_LO(i), data);
1270 data = ha->addr[5];
1271 data = ha->addr[4] | (data << 8);
1272 data |= RFE_ADDR_FILT_HI_VALID_;
1273 lan743x_csr_write(adapter,
1274 RFE_ADDR_FILT_HI(i), data);
1275 } else {
1276 u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
1277 23) & 0x1FF;
1278 hash_table[bitnum / 32] |= (1 << (bitnum % 32));
1279 rfctl |= RFE_CTL_MCAST_HASH_;
1280 }
1281 i++;
1282 }
1283 }
1284
1285 lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
1286 DP_SEL_VHF_VLAN_LEN,
1287 DP_SEL_VHF_HASH_LEN, hash_table);
1288 lan743x_csr_write(adapter, RFE_CTL, rfctl);
1289 }
1290
lan743x_dmac_init(struct lan743x_adapter * adapter)1291 static int lan743x_dmac_init(struct lan743x_adapter *adapter)
1292 {
1293 u32 data = 0;
1294
1295 lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
1296 lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
1297 0, 1000, 20000, 100);
1298 switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
1299 case DMA_DESCRIPTOR_SPACING_16:
1300 data = DMAC_CFG_MAX_DSPACE_16_;
1301 break;
1302 case DMA_DESCRIPTOR_SPACING_32:
1303 data = DMAC_CFG_MAX_DSPACE_32_;
1304 break;
1305 case DMA_DESCRIPTOR_SPACING_64:
1306 data = DMAC_CFG_MAX_DSPACE_64_;
1307 break;
1308 case DMA_DESCRIPTOR_SPACING_128:
1309 data = DMAC_CFG_MAX_DSPACE_128_;
1310 break;
1311 default:
1312 return -EPERM;
1313 }
1314 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
1315 data |= DMAC_CFG_COAL_EN_;
1316 data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
1317 data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
1318 lan743x_csr_write(adapter, DMAC_CFG, data);
1319 data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
1320 data |= DMAC_COAL_CFG_TIMER_TX_START_;
1321 data |= DMAC_COAL_CFG_FLUSH_INTS_;
1322 data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
1323 data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
1324 data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
1325 data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
1326 lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
1327 data = DMAC_OBFF_TX_THRES_SET_(0x08);
1328 data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
1329 lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
1330 return 0;
1331 }
1332
lan743x_dmac_tx_get_state(struct lan743x_adapter * adapter,int tx_channel)1333 static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
1334 int tx_channel)
1335 {
1336 u32 dmac_cmd = 0;
1337
1338 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1339 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1340 DMAC_CMD_START_T_(tx_channel)),
1341 (dmac_cmd &
1342 DMAC_CMD_STOP_T_(tx_channel)));
1343 }
1344
lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter * adapter,int tx_channel)1345 static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
1346 int tx_channel)
1347 {
1348 int timeout = 100;
1349 int result = 0;
1350
1351 while (timeout &&
1352 ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
1353 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1354 usleep_range(1000, 20000);
1355 timeout--;
1356 }
1357 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1358 result = -ENODEV;
1359 return result;
1360 }
1361
lan743x_dmac_rx_get_state(struct lan743x_adapter * adapter,int rx_channel)1362 static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
1363 int rx_channel)
1364 {
1365 u32 dmac_cmd = 0;
1366
1367 dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
1368 return DMAC_CHANNEL_STATE_SET((dmac_cmd &
1369 DMAC_CMD_START_R_(rx_channel)),
1370 (dmac_cmd &
1371 DMAC_CMD_STOP_R_(rx_channel)));
1372 }
1373
lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter * adapter,int rx_channel)1374 static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
1375 int rx_channel)
1376 {
1377 int timeout = 100;
1378 int result = 0;
1379
1380 while (timeout &&
1381 ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
1382 DMAC_CHANNEL_STATE_STOP_PENDING)) {
1383 usleep_range(1000, 20000);
1384 timeout--;
1385 }
1386 if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
1387 result = -ENODEV;
1388 return result;
1389 }
1390
lan743x_tx_release_desc(struct lan743x_tx * tx,int descriptor_index,bool cleanup)1391 static void lan743x_tx_release_desc(struct lan743x_tx *tx,
1392 int descriptor_index, bool cleanup)
1393 {
1394 struct lan743x_tx_buffer_info *buffer_info = NULL;
1395 struct lan743x_tx_descriptor *descriptor = NULL;
1396 u32 descriptor_type = 0;
1397 bool ignore_sync;
1398
1399 descriptor = &tx->ring_cpu_ptr[descriptor_index];
1400 buffer_info = &tx->buffer_info[descriptor_index];
1401 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
1402 goto done;
1403
1404 descriptor_type = le32_to_cpu(descriptor->data0) &
1405 TX_DESC_DATA0_DTYPE_MASK_;
1406 if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
1407 goto clean_up_data_descriptor;
1408 else
1409 goto clear_active;
1410
1411 clean_up_data_descriptor:
1412 if (buffer_info->dma_ptr) {
1413 if (buffer_info->flags &
1414 TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
1415 dma_unmap_page(&tx->adapter->pdev->dev,
1416 buffer_info->dma_ptr,
1417 buffer_info->buffer_length,
1418 DMA_TO_DEVICE);
1419 } else {
1420 dma_unmap_single(&tx->adapter->pdev->dev,
1421 buffer_info->dma_ptr,
1422 buffer_info->buffer_length,
1423 DMA_TO_DEVICE);
1424 }
1425 buffer_info->dma_ptr = 0;
1426 buffer_info->buffer_length = 0;
1427 }
1428 if (!buffer_info->skb)
1429 goto clear_active;
1430
1431 if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
1432 dev_kfree_skb_any(buffer_info->skb);
1433 goto clear_skb;
1434 }
1435
1436 if (cleanup) {
1437 lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
1438 dev_kfree_skb_any(buffer_info->skb);
1439 } else {
1440 ignore_sync = (buffer_info->flags &
1441 TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
1442 lan743x_ptp_tx_timestamp_skb(tx->adapter,
1443 buffer_info->skb, ignore_sync);
1444 }
1445
1446 clear_skb:
1447 buffer_info->skb = NULL;
1448
1449 clear_active:
1450 buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
1451
1452 done:
1453 memset(buffer_info, 0, sizeof(*buffer_info));
1454 memset(descriptor, 0, sizeof(*descriptor));
1455 }
1456
lan743x_tx_next_index(struct lan743x_tx * tx,int index)1457 static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
1458 {
1459 return ((++index) % tx->ring_size);
1460 }
1461
lan743x_tx_release_completed_descriptors(struct lan743x_tx * tx)1462 static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
1463 {
1464 while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
1465 lan743x_tx_release_desc(tx, tx->last_head, false);
1466 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1467 }
1468 }
1469
lan743x_tx_release_all_descriptors(struct lan743x_tx * tx)1470 static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
1471 {
1472 u32 original_head = 0;
1473
1474 original_head = tx->last_head;
1475 do {
1476 lan743x_tx_release_desc(tx, tx->last_head, true);
1477 tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
1478 } while (tx->last_head != original_head);
1479 memset(tx->ring_cpu_ptr, 0,
1480 sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
1481 memset(tx->buffer_info, 0,
1482 sizeof(*tx->buffer_info) * (tx->ring_size));
1483 }
1484
lan743x_tx_get_desc_cnt(struct lan743x_tx * tx,struct sk_buff * skb)1485 static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
1486 struct sk_buff *skb)
1487 {
1488 int result = 1; /* 1 for the main skb buffer */
1489 int nr_frags = 0;
1490
1491 if (skb_is_gso(skb))
1492 result++; /* requires an extension descriptor */
1493 nr_frags = skb_shinfo(skb)->nr_frags;
1494 result += nr_frags; /* 1 for each fragment buffer */
1495 return result;
1496 }
1497
lan743x_tx_get_avail_desc(struct lan743x_tx * tx)1498 static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
1499 {
1500 int last_head = tx->last_head;
1501 int last_tail = tx->last_tail;
1502
1503 if (last_tail >= last_head)
1504 return tx->ring_size - last_tail + last_head - 1;
1505 else
1506 return last_head - last_tail - 1;
1507 }
1508
lan743x_tx_set_timestamping_mode(struct lan743x_tx * tx,bool enable_timestamping,bool enable_onestep_sync)1509 void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
1510 bool enable_timestamping,
1511 bool enable_onestep_sync)
1512 {
1513 if (enable_timestamping)
1514 tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
1515 else
1516 tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
1517 if (enable_onestep_sync)
1518 tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
1519 else
1520 tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
1521 }
1522
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)1523 static int lan743x_tx_frame_start(struct lan743x_tx *tx,
1524 unsigned char *first_buffer,
1525 unsigned int first_buffer_length,
1526 unsigned int frame_length,
1527 bool time_stamp,
1528 bool check_sum)
1529 {
1530 /* called only from within lan743x_tx_xmit_frame.
1531 * assuming tx->ring_lock has already been acquired.
1532 */
1533 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1534 struct lan743x_tx_buffer_info *buffer_info = NULL;
1535 struct lan743x_adapter *adapter = tx->adapter;
1536 struct device *dev = &adapter->pdev->dev;
1537 dma_addr_t dma_ptr;
1538
1539 tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
1540 tx->frame_first = tx->last_tail;
1541 tx->frame_tail = tx->frame_first;
1542
1543 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1544 buffer_info = &tx->buffer_info[tx->frame_tail];
1545 dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
1546 DMA_TO_DEVICE);
1547 if (dma_mapping_error(dev, dma_ptr))
1548 return -ENOMEM;
1549
1550 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1551 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1552 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1553 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1554
1555 buffer_info->skb = NULL;
1556 buffer_info->dma_ptr = dma_ptr;
1557 buffer_info->buffer_length = first_buffer_length;
1558 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1559
1560 tx->frame_data0 = (first_buffer_length &
1561 TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1562 TX_DESC_DATA0_DTYPE_DATA_ |
1563 TX_DESC_DATA0_FS_ |
1564 TX_DESC_DATA0_FCS_;
1565 if (time_stamp)
1566 tx->frame_data0 |= TX_DESC_DATA0_TSE_;
1567
1568 if (check_sum)
1569 tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
1570 TX_DESC_DATA0_IPE_ |
1571 TX_DESC_DATA0_TPE_;
1572
1573 /* data0 will be programmed in one of other frame assembler functions */
1574 return 0;
1575 }
1576
lan743x_tx_frame_add_lso(struct lan743x_tx * tx,unsigned int frame_length,int nr_frags)1577 static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
1578 unsigned int frame_length,
1579 int nr_frags)
1580 {
1581 /* called only from within lan743x_tx_xmit_frame.
1582 * assuming tx->ring_lock has already been acquired.
1583 */
1584 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1585 struct lan743x_tx_buffer_info *buffer_info = NULL;
1586
1587 /* wrap up previous descriptor */
1588 tx->frame_data0 |= TX_DESC_DATA0_EXT_;
1589 if (nr_frags <= 0) {
1590 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1591 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1592 }
1593 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1594 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1595
1596 /* move to next descriptor */
1597 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1598 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1599 buffer_info = &tx->buffer_info[tx->frame_tail];
1600
1601 /* add extension descriptor */
1602 tx_descriptor->data1 = 0;
1603 tx_descriptor->data2 = 0;
1604 tx_descriptor->data3 = 0;
1605
1606 buffer_info->skb = NULL;
1607 buffer_info->dma_ptr = 0;
1608 buffer_info->buffer_length = 0;
1609 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1610
1611 tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
1612 TX_DESC_DATA0_DTYPE_EXT_ |
1613 TX_DESC_DATA0_EXT_LSO_;
1614
1615 /* data0 will be programmed in one of other frame assembler functions */
1616 }
1617
lan743x_tx_frame_add_fragment(struct lan743x_tx * tx,const skb_frag_t * fragment,unsigned int frame_length)1618 static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
1619 const skb_frag_t *fragment,
1620 unsigned int frame_length)
1621 {
1622 /* called only from within lan743x_tx_xmit_frame
1623 * assuming tx->ring_lock has already been acquired
1624 */
1625 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1626 struct lan743x_tx_buffer_info *buffer_info = NULL;
1627 struct lan743x_adapter *adapter = tx->adapter;
1628 struct device *dev = &adapter->pdev->dev;
1629 unsigned int fragment_length = 0;
1630 dma_addr_t dma_ptr;
1631
1632 fragment_length = skb_frag_size(fragment);
1633 if (!fragment_length)
1634 return 0;
1635
1636 /* wrap up previous descriptor */
1637 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1638 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1639
1640 /* move to next descriptor */
1641 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1642 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1643 buffer_info = &tx->buffer_info[tx->frame_tail];
1644 dma_ptr = skb_frag_dma_map(dev, fragment,
1645 0, fragment_length,
1646 DMA_TO_DEVICE);
1647 if (dma_mapping_error(dev, dma_ptr)) {
1648 int desc_index;
1649
1650 /* cleanup all previously setup descriptors */
1651 desc_index = tx->frame_first;
1652 while (desc_index != tx->frame_tail) {
1653 lan743x_tx_release_desc(tx, desc_index, true);
1654 desc_index = lan743x_tx_next_index(tx, desc_index);
1655 }
1656 dma_wmb();
1657 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1658 tx->frame_first = 0;
1659 tx->frame_data0 = 0;
1660 tx->frame_tail = 0;
1661 return -ENOMEM;
1662 }
1663
1664 tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
1665 tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
1666 tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
1667 TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
1668
1669 buffer_info->skb = NULL;
1670 buffer_info->dma_ptr = dma_ptr;
1671 buffer_info->buffer_length = fragment_length;
1672 buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
1673 buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
1674
1675 tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
1676 TX_DESC_DATA0_DTYPE_DATA_ |
1677 TX_DESC_DATA0_FCS_;
1678
1679 /* data0 will be programmed in one of other frame assembler functions */
1680 return 0;
1681 }
1682
lan743x_tx_frame_end(struct lan743x_tx * tx,struct sk_buff * skb,bool time_stamp,bool ignore_sync)1683 static void lan743x_tx_frame_end(struct lan743x_tx *tx,
1684 struct sk_buff *skb,
1685 bool time_stamp,
1686 bool ignore_sync)
1687 {
1688 /* called only from within lan743x_tx_xmit_frame
1689 * assuming tx->ring_lock has already been acquired
1690 */
1691 struct lan743x_tx_descriptor *tx_descriptor = NULL;
1692 struct lan743x_tx_buffer_info *buffer_info = NULL;
1693 struct lan743x_adapter *adapter = tx->adapter;
1694 u32 tx_tail_flags = 0;
1695
1696 /* wrap up previous descriptor */
1697 if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
1698 TX_DESC_DATA0_DTYPE_DATA_) {
1699 tx->frame_data0 |= TX_DESC_DATA0_LS_;
1700 tx->frame_data0 |= TX_DESC_DATA0_IOC_;
1701 }
1702
1703 tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
1704 buffer_info = &tx->buffer_info[tx->frame_tail];
1705 buffer_info->skb = skb;
1706 if (time_stamp)
1707 buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
1708 if (ignore_sync)
1709 buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
1710
1711 tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
1712 tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
1713 tx->last_tail = tx->frame_tail;
1714
1715 dma_wmb();
1716
1717 if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
1718 tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
1719 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
1720 tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
1721 TX_TAIL_SET_TOP_INT_EN_;
1722
1723 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
1724 tx_tail_flags | tx->frame_tail);
1725 tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
1726 }
1727
lan743x_tx_xmit_frame(struct lan743x_tx * tx,struct sk_buff * skb)1728 static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
1729 struct sk_buff *skb)
1730 {
1731 int required_number_of_descriptors = 0;
1732 unsigned int start_frame_length = 0;
1733 unsigned int frame_length = 0;
1734 unsigned int head_length = 0;
1735 unsigned long irq_flags = 0;
1736 bool do_timestamp = false;
1737 bool ignore_sync = false;
1738 int nr_frags = 0;
1739 bool gso = false;
1740 int j;
1741
1742 required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
1743
1744 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1745 if (required_number_of_descriptors >
1746 lan743x_tx_get_avail_desc(tx)) {
1747 if (required_number_of_descriptors > (tx->ring_size - 1)) {
1748 dev_kfree_skb_irq(skb);
1749 } else {
1750 /* save to overflow buffer */
1751 tx->overflow_skb = skb;
1752 netif_stop_queue(tx->adapter->netdev);
1753 }
1754 goto unlock;
1755 }
1756
1757 /* space available, transmit skb */
1758 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1759 (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
1760 (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
1761 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1762 do_timestamp = true;
1763 if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
1764 ignore_sync = true;
1765 }
1766 head_length = skb_headlen(skb);
1767 frame_length = skb_pagelen(skb);
1768 nr_frags = skb_shinfo(skb)->nr_frags;
1769 start_frame_length = frame_length;
1770 gso = skb_is_gso(skb);
1771 if (gso) {
1772 start_frame_length = max(skb_shinfo(skb)->gso_size,
1773 (unsigned short)8);
1774 }
1775
1776 if (lan743x_tx_frame_start(tx,
1777 skb->data, head_length,
1778 start_frame_length,
1779 do_timestamp,
1780 skb->ip_summed == CHECKSUM_PARTIAL)) {
1781 dev_kfree_skb_irq(skb);
1782 goto unlock;
1783 }
1784 tx->frame_count++;
1785
1786 if (gso)
1787 lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
1788
1789 if (nr_frags <= 0)
1790 goto finish;
1791
1792 for (j = 0; j < nr_frags; j++) {
1793 const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
1794
1795 if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
1796 /* upon error no need to call
1797 * lan743x_tx_frame_end
1798 * frame assembler clean up was performed inside
1799 * lan743x_tx_frame_add_fragment
1800 */
1801 dev_kfree_skb_irq(skb);
1802 goto unlock;
1803 }
1804 }
1805
1806 finish:
1807 lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
1808
1809 unlock:
1810 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1811 return NETDEV_TX_OK;
1812 }
1813
lan743x_tx_napi_poll(struct napi_struct * napi,int weight)1814 static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
1815 {
1816 struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
1817 struct lan743x_adapter *adapter = tx->adapter;
1818 bool start_transmitter = false;
1819 unsigned long irq_flags = 0;
1820 u32 ioc_bit = 0;
1821
1822 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
1823 lan743x_csr_read(adapter, DMAC_INT_STS);
1824 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
1825 lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
1826 spin_lock_irqsave(&tx->ring_lock, irq_flags);
1827
1828 /* clean up tx ring */
1829 lan743x_tx_release_completed_descriptors(tx);
1830 if (netif_queue_stopped(adapter->netdev)) {
1831 if (tx->overflow_skb) {
1832 if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
1833 lan743x_tx_get_avail_desc(tx))
1834 start_transmitter = true;
1835 } else {
1836 netif_wake_queue(adapter->netdev);
1837 }
1838 }
1839 spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
1840
1841 if (start_transmitter) {
1842 /* space is now available, transmit overflow skb */
1843 lan743x_tx_xmit_frame(tx, tx->overflow_skb);
1844 tx->overflow_skb = NULL;
1845 netif_wake_queue(adapter->netdev);
1846 }
1847
1848 if (!napi_complete(napi))
1849 goto done;
1850
1851 /* enable isr */
1852 lan743x_csr_write(adapter, INT_EN_SET,
1853 INT_BIT_DMA_TX_(tx->channel_number));
1854 lan743x_csr_read(adapter, INT_STS);
1855
1856 done:
1857 return 0;
1858 }
1859
lan743x_tx_ring_cleanup(struct lan743x_tx * tx)1860 static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
1861 {
1862 if (tx->head_cpu_ptr) {
1863 dma_free_coherent(&tx->adapter->pdev->dev,
1864 sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
1865 tx->head_dma_ptr);
1866 tx->head_cpu_ptr = NULL;
1867 tx->head_dma_ptr = 0;
1868 }
1869 kfree(tx->buffer_info);
1870 tx->buffer_info = NULL;
1871
1872 if (tx->ring_cpu_ptr) {
1873 dma_free_coherent(&tx->adapter->pdev->dev,
1874 tx->ring_allocation_size, tx->ring_cpu_ptr,
1875 tx->ring_dma_ptr);
1876 tx->ring_allocation_size = 0;
1877 tx->ring_cpu_ptr = NULL;
1878 tx->ring_dma_ptr = 0;
1879 }
1880 tx->ring_size = 0;
1881 }
1882
lan743x_tx_ring_init(struct lan743x_tx * tx)1883 static int lan743x_tx_ring_init(struct lan743x_tx *tx)
1884 {
1885 size_t ring_allocation_size = 0;
1886 void *cpu_ptr = NULL;
1887 dma_addr_t dma_ptr;
1888 int ret = -ENOMEM;
1889
1890 tx->ring_size = LAN743X_TX_RING_SIZE;
1891 if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
1892 ret = -EINVAL;
1893 goto cleanup;
1894 }
1895 if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
1896 DMA_BIT_MASK(64))) {
1897 dev_warn(&tx->adapter->pdev->dev,
1898 "lan743x_: No suitable DMA available\n");
1899 ret = -ENOMEM;
1900 goto cleanup;
1901 }
1902 ring_allocation_size = ALIGN(tx->ring_size *
1903 sizeof(struct lan743x_tx_descriptor),
1904 PAGE_SIZE);
1905 dma_ptr = 0;
1906 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1907 ring_allocation_size, &dma_ptr, GFP_KERNEL);
1908 if (!cpu_ptr) {
1909 ret = -ENOMEM;
1910 goto cleanup;
1911 }
1912
1913 tx->ring_allocation_size = ring_allocation_size;
1914 tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
1915 tx->ring_dma_ptr = dma_ptr;
1916
1917 cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
1918 if (!cpu_ptr) {
1919 ret = -ENOMEM;
1920 goto cleanup;
1921 }
1922 tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
1923 dma_ptr = 0;
1924 cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
1925 sizeof(*tx->head_cpu_ptr), &dma_ptr,
1926 GFP_KERNEL);
1927 if (!cpu_ptr) {
1928 ret = -ENOMEM;
1929 goto cleanup;
1930 }
1931
1932 tx->head_cpu_ptr = cpu_ptr;
1933 tx->head_dma_ptr = dma_ptr;
1934 if (tx->head_dma_ptr & 0x3) {
1935 ret = -ENOMEM;
1936 goto cleanup;
1937 }
1938
1939 return 0;
1940
1941 cleanup:
1942 lan743x_tx_ring_cleanup(tx);
1943 return ret;
1944 }
1945
lan743x_tx_close(struct lan743x_tx * tx)1946 static void lan743x_tx_close(struct lan743x_tx *tx)
1947 {
1948 struct lan743x_adapter *adapter = tx->adapter;
1949
1950 lan743x_csr_write(adapter,
1951 DMAC_CMD,
1952 DMAC_CMD_STOP_T_(tx->channel_number));
1953 lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
1954
1955 lan743x_csr_write(adapter,
1956 DMAC_INT_EN_CLR,
1957 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
1958 lan743x_csr_write(adapter, INT_EN_CLR,
1959 INT_BIT_DMA_TX_(tx->channel_number));
1960 napi_disable(&tx->napi);
1961 netif_napi_del(&tx->napi);
1962
1963 lan743x_csr_write(adapter, FCT_TX_CTL,
1964 FCT_TX_CTL_DIS_(tx->channel_number));
1965 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1966 FCT_TX_CTL_EN_(tx->channel_number),
1967 0, 1000, 20000, 100);
1968
1969 lan743x_tx_release_all_descriptors(tx);
1970
1971 if (tx->overflow_skb) {
1972 dev_kfree_skb(tx->overflow_skb);
1973 tx->overflow_skb = NULL;
1974 }
1975
1976 lan743x_tx_ring_cleanup(tx);
1977 }
1978
lan743x_tx_open(struct lan743x_tx * tx)1979 static int lan743x_tx_open(struct lan743x_tx *tx)
1980 {
1981 struct lan743x_adapter *adapter = NULL;
1982 u32 data = 0;
1983 int ret;
1984
1985 adapter = tx->adapter;
1986 ret = lan743x_tx_ring_init(tx);
1987 if (ret)
1988 return ret;
1989
1990 /* initialize fifo */
1991 lan743x_csr_write(adapter, FCT_TX_CTL,
1992 FCT_TX_CTL_RESET_(tx->channel_number));
1993 lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
1994 FCT_TX_CTL_RESET_(tx->channel_number),
1995 0, 1000, 20000, 100);
1996
1997 /* enable fifo */
1998 lan743x_csr_write(adapter, FCT_TX_CTL,
1999 FCT_TX_CTL_EN_(tx->channel_number));
2000
2001 /* reset tx channel */
2002 lan743x_csr_write(adapter, DMAC_CMD,
2003 DMAC_CMD_TX_SWR_(tx->channel_number));
2004 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2005 DMAC_CMD_TX_SWR_(tx->channel_number),
2006 0, 1000, 20000, 100);
2007
2008 /* Write TX_BASE_ADDR */
2009 lan743x_csr_write(adapter,
2010 TX_BASE_ADDRH(tx->channel_number),
2011 DMA_ADDR_HIGH32(tx->ring_dma_ptr));
2012 lan743x_csr_write(adapter,
2013 TX_BASE_ADDRL(tx->channel_number),
2014 DMA_ADDR_LOW32(tx->ring_dma_ptr));
2015
2016 /* Write TX_CFG_B */
2017 data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
2018 data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
2019 data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
2020 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2021 data |= TX_CFG_B_TDMABL_512_;
2022 lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
2023
2024 /* Write TX_CFG_A */
2025 data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
2026 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2027 data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
2028 data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
2029 data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
2030 data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
2031 }
2032 lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
2033
2034 /* Write TX_HEAD_WRITEBACK_ADDR */
2035 lan743x_csr_write(adapter,
2036 TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
2037 DMA_ADDR_HIGH32(tx->head_dma_ptr));
2038 lan743x_csr_write(adapter,
2039 TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
2040 DMA_ADDR_LOW32(tx->head_dma_ptr));
2041
2042 /* set last head */
2043 tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
2044
2045 /* write TX_TAIL */
2046 tx->last_tail = 0;
2047 lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
2048 (u32)(tx->last_tail));
2049 tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2050 INT_BIT_DMA_TX_
2051 (tx->channel_number));
2052 netif_napi_add_tx_weight(adapter->netdev,
2053 &tx->napi, lan743x_tx_napi_poll,
2054 tx->ring_size - 1);
2055 napi_enable(&tx->napi);
2056
2057 data = 0;
2058 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2059 data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
2060 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2061 data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
2062 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2063 data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
2064 if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2065 data |= TX_CFG_C_TX_INT_EN_R2C_;
2066 lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
2067
2068 if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
2069 lan743x_csr_write(adapter, INT_EN_SET,
2070 INT_BIT_DMA_TX_(tx->channel_number));
2071 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2072 DMAC_INT_BIT_TX_IOC_(tx->channel_number));
2073
2074 /* start dmac channel */
2075 lan743x_csr_write(adapter, DMAC_CMD,
2076 DMAC_CMD_START_T_(tx->channel_number));
2077 return 0;
2078 }
2079
lan743x_rx_next_index(struct lan743x_rx * rx,int index)2080 static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
2081 {
2082 return ((++index) % rx->ring_size);
2083 }
2084
lan743x_rx_update_tail(struct lan743x_rx * rx,int index)2085 static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
2086 {
2087 /* update the tail once per 8 descriptors */
2088 if ((index & 7) == 7)
2089 lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
2090 index);
2091 }
2092
lan743x_rx_init_ring_element(struct lan743x_rx * rx,int index,gfp_t gfp)2093 static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
2094 gfp_t gfp)
2095 {
2096 struct net_device *netdev = rx->adapter->netdev;
2097 struct device *dev = &rx->adapter->pdev->dev;
2098 struct lan743x_rx_buffer_info *buffer_info;
2099 unsigned int buffer_length, used_length;
2100 struct lan743x_rx_descriptor *descriptor;
2101 struct sk_buff *skb;
2102 dma_addr_t dma_ptr;
2103
2104 buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;
2105
2106 descriptor = &rx->ring_cpu_ptr[index];
2107 buffer_info = &rx->buffer_info[index];
2108 skb = __netdev_alloc_skb(netdev, buffer_length, gfp);
2109 if (!skb)
2110 return -ENOMEM;
2111 dma_ptr = dma_map_single(dev, skb->data, buffer_length, DMA_FROM_DEVICE);
2112 if (dma_mapping_error(dev, dma_ptr)) {
2113 dev_kfree_skb_any(skb);
2114 return -ENOMEM;
2115 }
2116 if (buffer_info->dma_ptr) {
2117 /* sync used area of buffer only */
2118 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_)
2119 /* frame length is valid only if LS bit is set.
2120 * it's a safe upper bound for the used area in this
2121 * buffer.
2122 */
2123 used_length = min(RX_DESC_DATA0_FRAME_LENGTH_GET_
2124 (le32_to_cpu(descriptor->data0)),
2125 buffer_info->buffer_length);
2126 else
2127 used_length = buffer_info->buffer_length;
2128 dma_sync_single_for_cpu(dev, buffer_info->dma_ptr,
2129 used_length,
2130 DMA_FROM_DEVICE);
2131 dma_unmap_single_attrs(dev, buffer_info->dma_ptr,
2132 buffer_info->buffer_length,
2133 DMA_FROM_DEVICE,
2134 DMA_ATTR_SKIP_CPU_SYNC);
2135 }
2136
2137 buffer_info->skb = skb;
2138 buffer_info->dma_ptr = dma_ptr;
2139 buffer_info->buffer_length = buffer_length;
2140 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2141 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2142 descriptor->data3 = 0;
2143 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2144 (buffer_length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2145 lan743x_rx_update_tail(rx, index);
2146
2147 return 0;
2148 }
2149
lan743x_rx_reuse_ring_element(struct lan743x_rx * rx,int index)2150 static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
2151 {
2152 struct lan743x_rx_buffer_info *buffer_info;
2153 struct lan743x_rx_descriptor *descriptor;
2154
2155 descriptor = &rx->ring_cpu_ptr[index];
2156 buffer_info = &rx->buffer_info[index];
2157
2158 descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
2159 descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
2160 descriptor->data3 = 0;
2161 descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
2162 ((buffer_info->buffer_length) &
2163 RX_DESC_DATA0_BUF_LENGTH_MASK_)));
2164 lan743x_rx_update_tail(rx, index);
2165 }
2166
lan743x_rx_release_ring_element(struct lan743x_rx * rx,int index)2167 static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
2168 {
2169 struct lan743x_rx_buffer_info *buffer_info;
2170 struct lan743x_rx_descriptor *descriptor;
2171
2172 descriptor = &rx->ring_cpu_ptr[index];
2173 buffer_info = &rx->buffer_info[index];
2174
2175 memset(descriptor, 0, sizeof(*descriptor));
2176
2177 if (buffer_info->dma_ptr) {
2178 dma_unmap_single(&rx->adapter->pdev->dev,
2179 buffer_info->dma_ptr,
2180 buffer_info->buffer_length,
2181 DMA_FROM_DEVICE);
2182 buffer_info->dma_ptr = 0;
2183 }
2184
2185 if (buffer_info->skb) {
2186 dev_kfree_skb(buffer_info->skb);
2187 buffer_info->skb = NULL;
2188 }
2189
2190 memset(buffer_info, 0, sizeof(*buffer_info));
2191 }
2192
2193 static struct sk_buff *
lan743x_rx_trim_skb(struct sk_buff * skb,int frame_length)2194 lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
2195 {
2196 if (skb_linearize(skb)) {
2197 dev_kfree_skb_irq(skb);
2198 return NULL;
2199 }
2200 frame_length = max_t(int, 0, frame_length - ETH_FCS_LEN);
2201 if (skb->len > frame_length) {
2202 skb->tail -= skb->len - frame_length;
2203 skb->len = frame_length;
2204 }
2205 return skb;
2206 }
2207
lan743x_rx_process_buffer(struct lan743x_rx * rx)2208 static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
2209 {
2210 int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
2211 struct lan743x_rx_descriptor *descriptor, *desc_ext;
2212 struct net_device *netdev = rx->adapter->netdev;
2213 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2214 struct lan743x_rx_buffer_info *buffer_info;
2215 int frame_length, buffer_length;
2216 int extension_index = -1;
2217 bool is_last, is_first;
2218 struct sk_buff *skb;
2219
2220 if (current_head_index < 0 || current_head_index >= rx->ring_size)
2221 goto done;
2222
2223 if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
2224 goto done;
2225
2226 if (rx->last_head == current_head_index)
2227 goto done;
2228
2229 descriptor = &rx->ring_cpu_ptr[rx->last_head];
2230 if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
2231 goto done;
2232 buffer_info = &rx->buffer_info[rx->last_head];
2233
2234 is_last = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_;
2235 is_first = le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_;
2236
2237 if (is_last && le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
2238 /* extension is expected to follow */
2239 int index = lan743x_rx_next_index(rx, rx->last_head);
2240
2241 if (index == current_head_index)
2242 /* extension not yet available */
2243 goto done;
2244 desc_ext = &rx->ring_cpu_ptr[index];
2245 if (le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_OWN_)
2246 /* extension not yet available */
2247 goto done;
2248 if (!(le32_to_cpu(desc_ext->data0) & RX_DESC_DATA0_EXT_))
2249 goto move_forward;
2250 extension_index = index;
2251 }
2252
2253 /* Only the last buffer in a multi-buffer frame contains the total frame
2254 * length. The chip occasionally sends more buffers than strictly
2255 * required to reach the total frame length.
2256 * Handle this by adding all buffers to the skb in their entirety.
2257 * Once the real frame length is known, trim the skb.
2258 */
2259 frame_length =
2260 RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
2261 buffer_length = buffer_info->buffer_length;
2262
2263 netdev_dbg(netdev, "%s%schunk: %d/%d",
2264 is_first ? "first " : " ",
2265 is_last ? "last " : " ",
2266 frame_length, buffer_length);
2267
2268 /* save existing skb, allocate new skb and map to dma */
2269 skb = buffer_info->skb;
2270 if (lan743x_rx_init_ring_element(rx, rx->last_head,
2271 GFP_ATOMIC | GFP_DMA)) {
2272 /* failed to allocate next skb.
2273 * Memory is very low.
2274 * Drop this packet and reuse buffer.
2275 */
2276 lan743x_rx_reuse_ring_element(rx, rx->last_head);
2277 /* drop packet that was being assembled */
2278 dev_kfree_skb_irq(rx->skb_head);
2279 rx->skb_head = NULL;
2280 goto process_extension;
2281 }
2282
2283 /* add buffers to skb via skb->frag_list */
2284 if (is_first) {
2285 skb_reserve(skb, RX_HEAD_PADDING);
2286 skb_put(skb, buffer_length - RX_HEAD_PADDING);
2287 if (rx->skb_head)
2288 dev_kfree_skb_irq(rx->skb_head);
2289 rx->skb_head = skb;
2290 } else if (rx->skb_head) {
2291 skb_put(skb, buffer_length);
2292 if (skb_shinfo(rx->skb_head)->frag_list)
2293 rx->skb_tail->next = skb;
2294 else
2295 skb_shinfo(rx->skb_head)->frag_list = skb;
2296 rx->skb_tail = skb;
2297 rx->skb_head->len += skb->len;
2298 rx->skb_head->data_len += skb->len;
2299 rx->skb_head->truesize += skb->truesize;
2300 } else {
2301 /* packet to assemble has already been dropped because one or
2302 * more of its buffers could not be allocated
2303 */
2304 netdev_dbg(netdev, "drop buffer intended for dropped packet");
2305 dev_kfree_skb_irq(skb);
2306 }
2307
2308 process_extension:
2309 if (extension_index >= 0) {
2310 u32 ts_sec;
2311 u32 ts_nsec;
2312
2313 ts_sec = le32_to_cpu(desc_ext->data1);
2314 ts_nsec = (le32_to_cpu(desc_ext->data2) &
2315 RX_DESC_DATA2_TS_NS_MASK_);
2316 if (rx->skb_head)
2317 skb_hwtstamps(rx->skb_head)->hwtstamp =
2318 ktime_set(ts_sec, ts_nsec);
2319 lan743x_rx_reuse_ring_element(rx, extension_index);
2320 rx->last_head = extension_index;
2321 netdev_dbg(netdev, "process extension");
2322 }
2323
2324 if (is_last && rx->skb_head)
2325 rx->skb_head = lan743x_rx_trim_skb(rx->skb_head, frame_length);
2326
2327 if (is_last && rx->skb_head) {
2328 rx->skb_head->protocol = eth_type_trans(rx->skb_head,
2329 rx->adapter->netdev);
2330 netdev_dbg(netdev, "sending %d byte frame to OS",
2331 rx->skb_head->len);
2332 napi_gro_receive(&rx->napi, rx->skb_head);
2333 rx->skb_head = NULL;
2334 }
2335
2336 move_forward:
2337 /* push tail and head forward */
2338 rx->last_tail = rx->last_head;
2339 rx->last_head = lan743x_rx_next_index(rx, rx->last_head);
2340 result = RX_PROCESS_RESULT_BUFFER_RECEIVED;
2341 done:
2342 return result;
2343 }
2344
lan743x_rx_napi_poll(struct napi_struct * napi,int weight)2345 static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
2346 {
2347 struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
2348 struct lan743x_adapter *adapter = rx->adapter;
2349 int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
2350 u32 rx_tail_flags = 0;
2351 int count;
2352
2353 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
2354 /* clear int status bit before reading packet */
2355 lan743x_csr_write(adapter, DMAC_INT_STS,
2356 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2357 }
2358 for (count = 0; count < weight; count++) {
2359 result = lan743x_rx_process_buffer(rx);
2360 if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
2361 break;
2362 }
2363 rx->frame_count += count;
2364 if (count == weight || result == RX_PROCESS_RESULT_BUFFER_RECEIVED)
2365 return weight;
2366
2367 if (!napi_complete_done(napi, count))
2368 return count;
2369
2370 /* re-arm interrupts, must write to rx tail on some chip variants */
2371 if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
2372 rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
2373 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
2374 rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
2375 } else {
2376 lan743x_csr_write(adapter, INT_EN_SET,
2377 INT_BIT_DMA_RX_(rx->channel_number));
2378 }
2379
2380 if (rx_tail_flags)
2381 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2382 rx_tail_flags | rx->last_tail);
2383
2384 return count;
2385 }
2386
lan743x_rx_ring_cleanup(struct lan743x_rx * rx)2387 static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
2388 {
2389 if (rx->buffer_info && rx->ring_cpu_ptr) {
2390 int index;
2391
2392 for (index = 0; index < rx->ring_size; index++)
2393 lan743x_rx_release_ring_element(rx, index);
2394 }
2395
2396 if (rx->head_cpu_ptr) {
2397 dma_free_coherent(&rx->adapter->pdev->dev,
2398 sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
2399 rx->head_dma_ptr);
2400 rx->head_cpu_ptr = NULL;
2401 rx->head_dma_ptr = 0;
2402 }
2403
2404 kfree(rx->buffer_info);
2405 rx->buffer_info = NULL;
2406
2407 if (rx->ring_cpu_ptr) {
2408 dma_free_coherent(&rx->adapter->pdev->dev,
2409 rx->ring_allocation_size, rx->ring_cpu_ptr,
2410 rx->ring_dma_ptr);
2411 rx->ring_allocation_size = 0;
2412 rx->ring_cpu_ptr = NULL;
2413 rx->ring_dma_ptr = 0;
2414 }
2415
2416 rx->ring_size = 0;
2417 rx->last_head = 0;
2418 }
2419
lan743x_rx_ring_init(struct lan743x_rx * rx)2420 static int lan743x_rx_ring_init(struct lan743x_rx *rx)
2421 {
2422 size_t ring_allocation_size = 0;
2423 dma_addr_t dma_ptr = 0;
2424 void *cpu_ptr = NULL;
2425 int ret = -ENOMEM;
2426 int index = 0;
2427
2428 rx->ring_size = LAN743X_RX_RING_SIZE;
2429 if (rx->ring_size <= 1) {
2430 ret = -EINVAL;
2431 goto cleanup;
2432 }
2433 if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
2434 ret = -EINVAL;
2435 goto cleanup;
2436 }
2437 if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
2438 DMA_BIT_MASK(64))) {
2439 dev_warn(&rx->adapter->pdev->dev,
2440 "lan743x_: No suitable DMA available\n");
2441 ret = -ENOMEM;
2442 goto cleanup;
2443 }
2444 ring_allocation_size = ALIGN(rx->ring_size *
2445 sizeof(struct lan743x_rx_descriptor),
2446 PAGE_SIZE);
2447 dma_ptr = 0;
2448 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2449 ring_allocation_size, &dma_ptr, GFP_KERNEL);
2450 if (!cpu_ptr) {
2451 ret = -ENOMEM;
2452 goto cleanup;
2453 }
2454 rx->ring_allocation_size = ring_allocation_size;
2455 rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
2456 rx->ring_dma_ptr = dma_ptr;
2457
2458 cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
2459 GFP_KERNEL);
2460 if (!cpu_ptr) {
2461 ret = -ENOMEM;
2462 goto cleanup;
2463 }
2464 rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
2465 dma_ptr = 0;
2466 cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
2467 sizeof(*rx->head_cpu_ptr), &dma_ptr,
2468 GFP_KERNEL);
2469 if (!cpu_ptr) {
2470 ret = -ENOMEM;
2471 goto cleanup;
2472 }
2473
2474 rx->head_cpu_ptr = cpu_ptr;
2475 rx->head_dma_ptr = dma_ptr;
2476 if (rx->head_dma_ptr & 0x3) {
2477 ret = -ENOMEM;
2478 goto cleanup;
2479 }
2480
2481 rx->last_head = 0;
2482 for (index = 0; index < rx->ring_size; index++) {
2483 ret = lan743x_rx_init_ring_element(rx, index, GFP_KERNEL);
2484 if (ret)
2485 goto cleanup;
2486 }
2487 return 0;
2488
2489 cleanup:
2490 netif_warn(rx->adapter, ifup, rx->adapter->netdev,
2491 "Error allocating memory for LAN743x\n");
2492
2493 lan743x_rx_ring_cleanup(rx);
2494 return ret;
2495 }
2496
lan743x_rx_close(struct lan743x_rx * rx)2497 static void lan743x_rx_close(struct lan743x_rx *rx)
2498 {
2499 struct lan743x_adapter *adapter = rx->adapter;
2500
2501 lan743x_csr_write(adapter, FCT_RX_CTL,
2502 FCT_RX_CTL_DIS_(rx->channel_number));
2503 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2504 FCT_RX_CTL_EN_(rx->channel_number),
2505 0, 1000, 20000, 100);
2506
2507 lan743x_csr_write(adapter, DMAC_CMD,
2508 DMAC_CMD_STOP_R_(rx->channel_number));
2509 lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
2510
2511 lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
2512 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2513 lan743x_csr_write(adapter, INT_EN_CLR,
2514 INT_BIT_DMA_RX_(rx->channel_number));
2515 napi_disable(&rx->napi);
2516
2517 netif_napi_del(&rx->napi);
2518
2519 lan743x_rx_ring_cleanup(rx);
2520 }
2521
lan743x_rx_open(struct lan743x_rx * rx)2522 static int lan743x_rx_open(struct lan743x_rx *rx)
2523 {
2524 struct lan743x_adapter *adapter = rx->adapter;
2525 u32 data = 0;
2526 int ret;
2527
2528 rx->frame_count = 0;
2529 ret = lan743x_rx_ring_init(rx);
2530 if (ret)
2531 goto return_error;
2532
2533 netif_napi_add(adapter->netdev,
2534 &rx->napi, lan743x_rx_napi_poll,
2535 NAPI_POLL_WEIGHT);
2536
2537 lan743x_csr_write(adapter, DMAC_CMD,
2538 DMAC_CMD_RX_SWR_(rx->channel_number));
2539 lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
2540 DMAC_CMD_RX_SWR_(rx->channel_number),
2541 0, 1000, 20000, 100);
2542
2543 /* set ring base address */
2544 lan743x_csr_write(adapter,
2545 RX_BASE_ADDRH(rx->channel_number),
2546 DMA_ADDR_HIGH32(rx->ring_dma_ptr));
2547 lan743x_csr_write(adapter,
2548 RX_BASE_ADDRL(rx->channel_number),
2549 DMA_ADDR_LOW32(rx->ring_dma_ptr));
2550
2551 /* set rx write back address */
2552 lan743x_csr_write(adapter,
2553 RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
2554 DMA_ADDR_HIGH32(rx->head_dma_ptr));
2555 lan743x_csr_write(adapter,
2556 RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
2557 DMA_ADDR_LOW32(rx->head_dma_ptr));
2558 data = RX_CFG_A_RX_HP_WB_EN_;
2559 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
2560 data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
2561 RX_CFG_A_RX_WB_THRES_SET_(0x7) |
2562 RX_CFG_A_RX_PF_THRES_SET_(16) |
2563 RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
2564 }
2565
2566 /* set RX_CFG_A */
2567 lan743x_csr_write(adapter,
2568 RX_CFG_A(rx->channel_number), data);
2569
2570 /* set RX_CFG_B */
2571 data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
2572 data &= ~RX_CFG_B_RX_PAD_MASK_;
2573 if (!RX_HEAD_PADDING)
2574 data |= RX_CFG_B_RX_PAD_0_;
2575 else
2576 data |= RX_CFG_B_RX_PAD_2_;
2577 data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
2578 data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
2579 data |= RX_CFG_B_TS_ALL_RX_;
2580 if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
2581 data |= RX_CFG_B_RDMABL_512_;
2582
2583 lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
2584 rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
2585 INT_BIT_DMA_RX_
2586 (rx->channel_number));
2587
2588 /* set RX_CFG_C */
2589 data = 0;
2590 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
2591 data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
2592 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
2593 data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
2594 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
2595 data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
2596 if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
2597 data |= RX_CFG_C_RX_INT_EN_R2C_;
2598 lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
2599
2600 rx->last_tail = ((u32)(rx->ring_size - 1));
2601 lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
2602 rx->last_tail);
2603 rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
2604 if (rx->last_head) {
2605 ret = -EIO;
2606 goto napi_delete;
2607 }
2608
2609 napi_enable(&rx->napi);
2610
2611 lan743x_csr_write(adapter, INT_EN_SET,
2612 INT_BIT_DMA_RX_(rx->channel_number));
2613 lan743x_csr_write(adapter, DMAC_INT_STS,
2614 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2615 lan743x_csr_write(adapter, DMAC_INT_EN_SET,
2616 DMAC_INT_BIT_RXFRM_(rx->channel_number));
2617 lan743x_csr_write(adapter, DMAC_CMD,
2618 DMAC_CMD_START_R_(rx->channel_number));
2619
2620 /* initialize fifo */
2621 lan743x_csr_write(adapter, FCT_RX_CTL,
2622 FCT_RX_CTL_RESET_(rx->channel_number));
2623 lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
2624 FCT_RX_CTL_RESET_(rx->channel_number),
2625 0, 1000, 20000, 100);
2626 lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
2627 FCT_FLOW_CTL_REQ_EN_ |
2628 FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
2629 FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
2630
2631 /* enable fifo */
2632 lan743x_csr_write(adapter, FCT_RX_CTL,
2633 FCT_RX_CTL_EN_(rx->channel_number));
2634 return 0;
2635
2636 napi_delete:
2637 netif_napi_del(&rx->napi);
2638 lan743x_rx_ring_cleanup(rx);
2639
2640 return_error:
2641 return ret;
2642 }
2643
lan743x_netdev_close(struct net_device * netdev)2644 static int lan743x_netdev_close(struct net_device *netdev)
2645 {
2646 struct lan743x_adapter *adapter = netdev_priv(netdev);
2647 int index;
2648
2649 for (index = 0; index < adapter->used_tx_channels; index++)
2650 lan743x_tx_close(&adapter->tx[index]);
2651
2652 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
2653 lan743x_rx_close(&adapter->rx[index]);
2654
2655 lan743x_ptp_close(adapter);
2656
2657 lan743x_phy_close(adapter);
2658
2659 lan743x_mac_close(adapter);
2660
2661 lan743x_intr_close(adapter);
2662
2663 return 0;
2664 }
2665
lan743x_netdev_open(struct net_device * netdev)2666 static int lan743x_netdev_open(struct net_device *netdev)
2667 {
2668 struct lan743x_adapter *adapter = netdev_priv(netdev);
2669 int index;
2670 int ret;
2671
2672 ret = lan743x_intr_open(adapter);
2673 if (ret)
2674 goto return_error;
2675
2676 ret = lan743x_mac_open(adapter);
2677 if (ret)
2678 goto close_intr;
2679
2680 ret = lan743x_phy_open(adapter);
2681 if (ret)
2682 goto close_mac;
2683
2684 ret = lan743x_ptp_open(adapter);
2685 if (ret)
2686 goto close_phy;
2687
2688 lan743x_rfe_open(adapter);
2689
2690 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2691 ret = lan743x_rx_open(&adapter->rx[index]);
2692 if (ret)
2693 goto close_rx;
2694 }
2695
2696 for (index = 0; index < adapter->used_tx_channels; index++) {
2697 ret = lan743x_tx_open(&adapter->tx[index]);
2698 if (ret)
2699 goto close_tx;
2700 }
2701 return 0;
2702
2703 close_tx:
2704 for (index = 0; index < adapter->used_tx_channels; index++) {
2705 if (adapter->tx[index].ring_cpu_ptr)
2706 lan743x_tx_close(&adapter->tx[index]);
2707 }
2708
2709 close_rx:
2710 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2711 if (adapter->rx[index].ring_cpu_ptr)
2712 lan743x_rx_close(&adapter->rx[index]);
2713 }
2714 lan743x_ptp_close(adapter);
2715
2716 close_phy:
2717 lan743x_phy_close(adapter);
2718
2719 close_mac:
2720 lan743x_mac_close(adapter);
2721
2722 close_intr:
2723 lan743x_intr_close(adapter);
2724
2725 return_error:
2726 netif_warn(adapter, ifup, adapter->netdev,
2727 "Error opening LAN743x\n");
2728 return ret;
2729 }
2730
lan743x_netdev_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2731 static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
2732 struct net_device *netdev)
2733 {
2734 struct lan743x_adapter *adapter = netdev_priv(netdev);
2735 u8 ch = 0;
2736
2737 if (adapter->is_pci11x1x)
2738 ch = skb->queue_mapping % PCI11X1X_USED_TX_CHANNELS;
2739
2740 return lan743x_tx_xmit_frame(&adapter->tx[ch], skb);
2741 }
2742
lan743x_netdev_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)2743 static int lan743x_netdev_ioctl(struct net_device *netdev,
2744 struct ifreq *ifr, int cmd)
2745 {
2746 if (!netif_running(netdev))
2747 return -EINVAL;
2748 if (cmd == SIOCSHWTSTAMP)
2749 return lan743x_ptp_ioctl(netdev, ifr, cmd);
2750 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
2751 }
2752
lan743x_netdev_set_multicast(struct net_device * netdev)2753 static void lan743x_netdev_set_multicast(struct net_device *netdev)
2754 {
2755 struct lan743x_adapter *adapter = netdev_priv(netdev);
2756
2757 lan743x_rfe_set_multicast(adapter);
2758 }
2759
lan743x_netdev_change_mtu(struct net_device * netdev,int new_mtu)2760 static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
2761 {
2762 struct lan743x_adapter *adapter = netdev_priv(netdev);
2763 int ret = 0;
2764
2765 ret = lan743x_mac_set_mtu(adapter, new_mtu);
2766 if (!ret)
2767 netdev->mtu = new_mtu;
2768 return ret;
2769 }
2770
lan743x_netdev_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * stats)2771 static void lan743x_netdev_get_stats64(struct net_device *netdev,
2772 struct rtnl_link_stats64 *stats)
2773 {
2774 struct lan743x_adapter *adapter = netdev_priv(netdev);
2775
2776 stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
2777 stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
2778 stats->rx_bytes = lan743x_csr_read(adapter,
2779 STAT_RX_UNICAST_BYTE_COUNT) +
2780 lan743x_csr_read(adapter,
2781 STAT_RX_BROADCAST_BYTE_COUNT) +
2782 lan743x_csr_read(adapter,
2783 STAT_RX_MULTICAST_BYTE_COUNT);
2784 stats->tx_bytes = lan743x_csr_read(adapter,
2785 STAT_TX_UNICAST_BYTE_COUNT) +
2786 lan743x_csr_read(adapter,
2787 STAT_TX_BROADCAST_BYTE_COUNT) +
2788 lan743x_csr_read(adapter,
2789 STAT_TX_MULTICAST_BYTE_COUNT);
2790 stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
2791 lan743x_csr_read(adapter,
2792 STAT_RX_ALIGNMENT_ERRORS) +
2793 lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
2794 lan743x_csr_read(adapter,
2795 STAT_RX_UNDERSIZE_FRAME_ERRORS) +
2796 lan743x_csr_read(adapter,
2797 STAT_RX_OVERSIZE_FRAME_ERRORS);
2798 stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
2799 lan743x_csr_read(adapter,
2800 STAT_TX_EXCESS_DEFERRAL_ERRORS) +
2801 lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
2802 stats->rx_dropped = lan743x_csr_read(adapter,
2803 STAT_RX_DROPPED_FRAMES);
2804 stats->tx_dropped = lan743x_csr_read(adapter,
2805 STAT_TX_EXCESSIVE_COLLISION);
2806 stats->multicast = lan743x_csr_read(adapter,
2807 STAT_RX_MULTICAST_FRAMES) +
2808 lan743x_csr_read(adapter,
2809 STAT_TX_MULTICAST_FRAMES);
2810 stats->collisions = lan743x_csr_read(adapter,
2811 STAT_TX_SINGLE_COLLISIONS) +
2812 lan743x_csr_read(adapter,
2813 STAT_TX_MULTIPLE_COLLISIONS) +
2814 lan743x_csr_read(adapter,
2815 STAT_TX_LATE_COLLISIONS);
2816 }
2817
lan743x_netdev_set_mac_address(struct net_device * netdev,void * addr)2818 static int lan743x_netdev_set_mac_address(struct net_device *netdev,
2819 void *addr)
2820 {
2821 struct lan743x_adapter *adapter = netdev_priv(netdev);
2822 struct sockaddr *sock_addr = addr;
2823 int ret;
2824
2825 ret = eth_prepare_mac_addr_change(netdev, sock_addr);
2826 if (ret)
2827 return ret;
2828 eth_hw_addr_set(netdev, sock_addr->sa_data);
2829 lan743x_mac_set_address(adapter, sock_addr->sa_data);
2830 lan743x_rfe_update_mac_address(adapter);
2831 return 0;
2832 }
2833
2834 static const struct net_device_ops lan743x_netdev_ops = {
2835 .ndo_open = lan743x_netdev_open,
2836 .ndo_stop = lan743x_netdev_close,
2837 .ndo_start_xmit = lan743x_netdev_xmit_frame,
2838 .ndo_eth_ioctl = lan743x_netdev_ioctl,
2839 .ndo_set_rx_mode = lan743x_netdev_set_multicast,
2840 .ndo_change_mtu = lan743x_netdev_change_mtu,
2841 .ndo_get_stats64 = lan743x_netdev_get_stats64,
2842 .ndo_set_mac_address = lan743x_netdev_set_mac_address,
2843 };
2844
lan743x_hardware_cleanup(struct lan743x_adapter * adapter)2845 static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
2846 {
2847 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2848 }
2849
lan743x_mdiobus_cleanup(struct lan743x_adapter * adapter)2850 static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
2851 {
2852 mdiobus_unregister(adapter->mdiobus);
2853 }
2854
lan743x_full_cleanup(struct lan743x_adapter * adapter)2855 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
2856 {
2857 unregister_netdev(adapter->netdev);
2858
2859 lan743x_mdiobus_cleanup(adapter);
2860 lan743x_hardware_cleanup(adapter);
2861 lan743x_pci_cleanup(adapter);
2862 }
2863
lan743x_hardware_init(struct lan743x_adapter * adapter,struct pci_dev * pdev)2864 static int lan743x_hardware_init(struct lan743x_adapter *adapter,
2865 struct pci_dev *pdev)
2866 {
2867 struct lan743x_tx *tx;
2868 int index;
2869 int ret;
2870
2871 adapter->is_pci11x1x = is_pci11x1x_chip(adapter);
2872 if (adapter->is_pci11x1x) {
2873 adapter->max_tx_channels = PCI11X1X_MAX_TX_CHANNELS;
2874 adapter->used_tx_channels = PCI11X1X_USED_TX_CHANNELS;
2875 adapter->max_vector_count = PCI11X1X_MAX_VECTOR_COUNT;
2876 pci11x1x_strap_get_status(adapter);
2877 spin_lock_init(&adapter->eth_syslock_spinlock);
2878 } else {
2879 adapter->max_tx_channels = LAN743X_MAX_TX_CHANNELS;
2880 adapter->used_tx_channels = LAN743X_USED_TX_CHANNELS;
2881 adapter->max_vector_count = LAN743X_MAX_VECTOR_COUNT;
2882 }
2883
2884 adapter->intr.irq = adapter->pdev->irq;
2885 lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
2886
2887 ret = lan743x_gpio_init(adapter);
2888 if (ret)
2889 return ret;
2890
2891 ret = lan743x_mac_init(adapter);
2892 if (ret)
2893 return ret;
2894
2895 ret = lan743x_phy_init(adapter);
2896 if (ret)
2897 return ret;
2898
2899 ret = lan743x_ptp_init(adapter);
2900 if (ret)
2901 return ret;
2902
2903 lan743x_rfe_update_mac_address(adapter);
2904
2905 ret = lan743x_dmac_init(adapter);
2906 if (ret)
2907 return ret;
2908
2909 for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
2910 adapter->rx[index].adapter = adapter;
2911 adapter->rx[index].channel_number = index;
2912 }
2913
2914 for (index = 0; index < adapter->used_tx_channels; index++) {
2915 tx = &adapter->tx[index];
2916 tx->adapter = adapter;
2917 tx->channel_number = index;
2918 spin_lock_init(&tx->ring_lock);
2919 }
2920
2921 return 0;
2922 }
2923
lan743x_mdiobus_init(struct lan743x_adapter * adapter)2924 static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
2925 {
2926 u32 sgmii_ctl;
2927 int ret;
2928
2929 adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
2930 if (!(adapter->mdiobus)) {
2931 ret = -ENOMEM;
2932 goto return_error;
2933 }
2934
2935 adapter->mdiobus->priv = (void *)adapter;
2936 if (adapter->is_pci11x1x) {
2937 if (adapter->is_sgmii_en) {
2938 sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
2939 sgmii_ctl |= SGMII_CTL_SGMII_ENABLE_;
2940 sgmii_ctl &= ~SGMII_CTL_SGMII_POWER_DN_;
2941 lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
2942 netif_dbg(adapter, drv, adapter->netdev,
2943 "SGMII operation\n");
2944 adapter->mdiobus->probe_capabilities = MDIOBUS_C22_C45;
2945 adapter->mdiobus->read = lan743x_mdiobus_c45_read;
2946 adapter->mdiobus->write = lan743x_mdiobus_c45_write;
2947 adapter->mdiobus->name = "lan743x-mdiobus-c45";
2948 netif_dbg(adapter, drv, adapter->netdev,
2949 "lan743x-mdiobus-c45\n");
2950 } else {
2951 sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
2952 sgmii_ctl &= ~SGMII_CTL_SGMII_ENABLE_;
2953 sgmii_ctl |= SGMII_CTL_SGMII_POWER_DN_;
2954 lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
2955 netif_dbg(adapter, drv, adapter->netdev,
2956 "RGMII operation\n");
2957 // Only C22 support when RGMII I/F
2958 adapter->mdiobus->probe_capabilities = MDIOBUS_C22;
2959 adapter->mdiobus->read = lan743x_mdiobus_read;
2960 adapter->mdiobus->write = lan743x_mdiobus_write;
2961 adapter->mdiobus->name = "lan743x-mdiobus";
2962 netif_dbg(adapter, drv, adapter->netdev,
2963 "lan743x-mdiobus\n");
2964 }
2965 } else {
2966 adapter->mdiobus->read = lan743x_mdiobus_read;
2967 adapter->mdiobus->write = lan743x_mdiobus_write;
2968 adapter->mdiobus->name = "lan743x-mdiobus";
2969 netif_dbg(adapter, drv, adapter->netdev, "lan743x-mdiobus\n");
2970 }
2971
2972 snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
2973 "pci-%s", pci_name(adapter->pdev));
2974
2975 if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
2976 /* LAN7430 uses internal phy at address 1 */
2977 adapter->mdiobus->phy_mask = ~(u32)BIT(1);
2978
2979 /* register mdiobus */
2980 ret = mdiobus_register(adapter->mdiobus);
2981 if (ret < 0)
2982 goto return_error;
2983 return 0;
2984
2985 return_error:
2986 return ret;
2987 }
2988
2989 /* lan743x_pcidev_probe - Device Initialization Routine
2990 * @pdev: PCI device information struct
2991 * @id: entry in lan743x_pci_tbl
2992 *
2993 * Returns 0 on success, negative on failure
2994 *
2995 * initializes an adapter identified by a pci_dev structure.
2996 * The OS initialization, configuring of the adapter private structure,
2997 * and a hardware reset occur.
2998 **/
lan743x_pcidev_probe(struct pci_dev * pdev,const struct pci_device_id * id)2999 static int lan743x_pcidev_probe(struct pci_dev *pdev,
3000 const struct pci_device_id *id)
3001 {
3002 struct lan743x_adapter *adapter = NULL;
3003 struct net_device *netdev = NULL;
3004 int ret = -ENODEV;
3005
3006 if (id->device == PCI_DEVICE_ID_SMSC_A011 ||
3007 id->device == PCI_DEVICE_ID_SMSC_A041) {
3008 netdev = devm_alloc_etherdev_mqs(&pdev->dev,
3009 sizeof(struct lan743x_adapter),
3010 PCI11X1X_USED_TX_CHANNELS,
3011 LAN743X_USED_RX_CHANNELS);
3012 } else {
3013 netdev = devm_alloc_etherdev(&pdev->dev,
3014 sizeof(struct lan743x_adapter));
3015 }
3016
3017 if (!netdev)
3018 goto return_error;
3019
3020 SET_NETDEV_DEV(netdev, &pdev->dev);
3021 pci_set_drvdata(pdev, netdev);
3022 adapter = netdev_priv(netdev);
3023 adapter->netdev = netdev;
3024 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
3025 NETIF_MSG_LINK | NETIF_MSG_IFUP |
3026 NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
3027 netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
3028
3029 of_get_mac_address(pdev->dev.of_node, adapter->mac_address);
3030
3031 ret = lan743x_pci_init(adapter, pdev);
3032 if (ret)
3033 goto return_error;
3034
3035 ret = lan743x_csr_init(adapter);
3036 if (ret)
3037 goto cleanup_pci;
3038
3039 ret = lan743x_hardware_init(adapter, pdev);
3040 if (ret)
3041 goto cleanup_pci;
3042
3043 ret = lan743x_mdiobus_init(adapter);
3044 if (ret)
3045 goto cleanup_hardware;
3046
3047 adapter->netdev->netdev_ops = &lan743x_netdev_ops;
3048 adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
3049 adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
3050 adapter->netdev->hw_features = adapter->netdev->features;
3051
3052 /* carrier off reporting is important to ethtool even BEFORE open */
3053 netif_carrier_off(netdev);
3054
3055 ret = register_netdev(adapter->netdev);
3056 if (ret < 0)
3057 goto cleanup_mdiobus;
3058 return 0;
3059
3060 cleanup_mdiobus:
3061 lan743x_mdiobus_cleanup(adapter);
3062
3063 cleanup_hardware:
3064 lan743x_hardware_cleanup(adapter);
3065
3066 cleanup_pci:
3067 lan743x_pci_cleanup(adapter);
3068
3069 return_error:
3070 pr_warn("Initialization failed\n");
3071 return ret;
3072 }
3073
3074 /**
3075 * lan743x_pcidev_remove - Device Removal Routine
3076 * @pdev: PCI device information struct
3077 *
3078 * this is called by the PCI subsystem to alert the driver
3079 * that it should release a PCI device. This could be caused by a
3080 * Hot-Plug event, or because the driver is going to be removed from
3081 * memory.
3082 **/
lan743x_pcidev_remove(struct pci_dev * pdev)3083 static void lan743x_pcidev_remove(struct pci_dev *pdev)
3084 {
3085 struct net_device *netdev = pci_get_drvdata(pdev);
3086 struct lan743x_adapter *adapter = netdev_priv(netdev);
3087
3088 lan743x_full_cleanup(adapter);
3089 }
3090
lan743x_pcidev_shutdown(struct pci_dev * pdev)3091 static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
3092 {
3093 struct net_device *netdev = pci_get_drvdata(pdev);
3094 struct lan743x_adapter *adapter = netdev_priv(netdev);
3095
3096 rtnl_lock();
3097 netif_device_detach(netdev);
3098
3099 /* close netdev when netdev is at running state.
3100 * For instance, it is true when system goes to sleep by pm-suspend
3101 * However, it is false when system goes to sleep by suspend GUI menu
3102 */
3103 if (netif_running(netdev))
3104 lan743x_netdev_close(netdev);
3105 rtnl_unlock();
3106
3107 #ifdef CONFIG_PM
3108 pci_save_state(pdev);
3109 #endif
3110
3111 /* clean up lan743x portion */
3112 lan743x_hardware_cleanup(adapter);
3113 }
3114
3115 #ifdef CONFIG_PM_SLEEP
lan743x_pm_wakeframe_crc16(const u8 * buf,int len)3116 static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
3117 {
3118 return bitrev16(crc16(0xFFFF, buf, len));
3119 }
3120
lan743x_pm_set_wol(struct lan743x_adapter * adapter)3121 static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
3122 {
3123 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
3124 const u8 ipv6_multicast[3] = { 0x33, 0x33 };
3125 const u8 arp_type[2] = { 0x08, 0x06 };
3126 int mask_index;
3127 u32 pmtctl;
3128 u32 wucsr;
3129 u32 macrx;
3130 u16 crc;
3131
3132 for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
3133 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
3134
3135 /* clear wake settings */
3136 pmtctl = lan743x_csr_read(adapter, PMT_CTL);
3137 pmtctl |= PMT_CTL_WUPS_MASK_;
3138 pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
3139 PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
3140 PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
3141
3142 macrx = lan743x_csr_read(adapter, MAC_RX);
3143
3144 wucsr = 0;
3145 mask_index = 0;
3146
3147 pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
3148
3149 if (adapter->wolopts & WAKE_PHY) {
3150 pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
3151 pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
3152 }
3153 if (adapter->wolopts & WAKE_MAGIC) {
3154 wucsr |= MAC_WUCSR_MPEN_;
3155 macrx |= MAC_RX_RXEN_;
3156 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3157 }
3158 if (adapter->wolopts & WAKE_UCAST) {
3159 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
3160 macrx |= MAC_RX_RXEN_;
3161 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3162 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3163 }
3164 if (adapter->wolopts & WAKE_BCAST) {
3165 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
3166 macrx |= MAC_RX_RXEN_;
3167 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3168 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3169 }
3170 if (adapter->wolopts & WAKE_MCAST) {
3171 /* IPv4 multicast */
3172 crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
3173 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3174 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3175 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3176 (crc & MAC_WUF_CFG_CRC16_MASK_));
3177 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
3178 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3179 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3180 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3181 mask_index++;
3182
3183 /* IPv6 multicast */
3184 crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
3185 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3186 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
3187 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3188 (crc & MAC_WUF_CFG_CRC16_MASK_));
3189 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
3190 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3191 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3192 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3193 mask_index++;
3194
3195 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3196 macrx |= MAC_RX_RXEN_;
3197 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3198 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3199 }
3200 if (adapter->wolopts & WAKE_ARP) {
3201 /* set MAC_WUF_CFG & WUF_MASK
3202 * for packettype (offset 12,13) = ARP (0x0806)
3203 */
3204 crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
3205 lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
3206 MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
3207 (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
3208 (crc & MAC_WUF_CFG_CRC16_MASK_));
3209 lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
3210 lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
3211 lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
3212 lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
3213 mask_index++;
3214
3215 wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
3216 macrx |= MAC_RX_RXEN_;
3217 pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
3218 pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
3219 }
3220
3221 lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
3222 lan743x_csr_write(adapter, PMT_CTL, pmtctl);
3223 lan743x_csr_write(adapter, MAC_RX, macrx);
3224 }
3225
lan743x_pm_suspend(struct device * dev)3226 static int lan743x_pm_suspend(struct device *dev)
3227 {
3228 struct pci_dev *pdev = to_pci_dev(dev);
3229 struct net_device *netdev = pci_get_drvdata(pdev);
3230 struct lan743x_adapter *adapter = netdev_priv(netdev);
3231
3232 lan743x_pcidev_shutdown(pdev);
3233
3234 /* clear all wakes */
3235 lan743x_csr_write(adapter, MAC_WUCSR, 0);
3236 lan743x_csr_write(adapter, MAC_WUCSR2, 0);
3237 lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
3238
3239 if (adapter->wolopts)
3240 lan743x_pm_set_wol(adapter);
3241
3242 /* Host sets PME_En, put D3hot */
3243 return pci_prepare_to_sleep(pdev);
3244 }
3245
lan743x_pm_resume(struct device * dev)3246 static int lan743x_pm_resume(struct device *dev)
3247 {
3248 struct pci_dev *pdev = to_pci_dev(dev);
3249 struct net_device *netdev = pci_get_drvdata(pdev);
3250 struct lan743x_adapter *adapter = netdev_priv(netdev);
3251 int ret;
3252
3253 pci_set_power_state(pdev, PCI_D0);
3254 pci_restore_state(pdev);
3255 pci_save_state(pdev);
3256
3257 ret = lan743x_hardware_init(adapter, pdev);
3258 if (ret) {
3259 netif_err(adapter, probe, adapter->netdev,
3260 "lan743x_hardware_init returned %d\n", ret);
3261 lan743x_pci_cleanup(adapter);
3262 return ret;
3263 }
3264
3265 /* open netdev when netdev is at running state while resume.
3266 * For instance, it is true when system wakesup after pm-suspend
3267 * However, it is false when system wakes up after suspend GUI menu
3268 */
3269 if (netif_running(netdev))
3270 lan743x_netdev_open(netdev);
3271
3272 netif_device_attach(netdev);
3273
3274 return 0;
3275 }
3276
3277 static const struct dev_pm_ops lan743x_pm_ops = {
3278 SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
3279 };
3280 #endif /* CONFIG_PM_SLEEP */
3281
3282 static const struct pci_device_id lan743x_pcidev_tbl[] = {
3283 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
3284 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
3285 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_A011) },
3286 { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_A041) },
3287 { 0, }
3288 };
3289
3290 MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
3291
3292 static struct pci_driver lan743x_pcidev_driver = {
3293 .name = DRIVER_NAME,
3294 .id_table = lan743x_pcidev_tbl,
3295 .probe = lan743x_pcidev_probe,
3296 .remove = lan743x_pcidev_remove,
3297 #ifdef CONFIG_PM_SLEEP
3298 .driver.pm = &lan743x_pm_ops,
3299 #endif
3300 .shutdown = lan743x_pcidev_shutdown,
3301 };
3302
3303 module_pci_driver(lan743x_pcidev_driver);
3304
3305 MODULE_AUTHOR(DRIVER_AUTHOR);
3306 MODULE_DESCRIPTION(DRIVER_DESC);
3307 MODULE_LICENSE("GPL");
3308