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35#include <linux/module.h>
36#include <linux/pci.h>
37#include <linux/interrupt.h>
38#include <linux/ip.h>
39#include <linux/ipv6.h>
40#include <linux/if_vlan.h>
41#include <linux/mdio.h>
42#include <linux/aer.h>
43#include <linux/bitops.h>
44#include <linux/netdevice.h>
45#include <linux/etherdevice.h>
46#include <net/ip6_checksum.h>
47#include <linux/crc32.h>
48#include "alx.h"
49#include "hw.h"
50#include "reg.h"
51
52static const char alx_drv_name[] = "alx";
53
54static void alx_free_txbuf(struct alx_tx_queue *txq, int entry)
55{
56 struct alx_buffer *txb = &txq->bufs[entry];
57
58 if (dma_unmap_len(txb, size)) {
59 dma_unmap_single(txq->dev,
60 dma_unmap_addr(txb, dma),
61 dma_unmap_len(txb, size),
62 DMA_TO_DEVICE);
63 dma_unmap_len_set(txb, size, 0);
64 }
65
66 if (txb->skb) {
67 dev_kfree_skb_any(txb->skb);
68 txb->skb = NULL;
69 }
70}
71
72static int alx_refill_rx_ring(struct alx_priv *alx, gfp_t gfp)
73{
74 struct alx_rx_queue *rxq = alx->qnapi[0]->rxq;
75 struct sk_buff *skb;
76 struct alx_buffer *cur_buf;
77 dma_addr_t dma;
78 u16 cur, next, count = 0;
79
80 next = cur = rxq->write_idx;
81 if (++next == alx->rx_ringsz)
82 next = 0;
83 cur_buf = &rxq->bufs[cur];
84
85 while (!cur_buf->skb && next != rxq->read_idx) {
86 struct alx_rfd *rfd = &rxq->rfd[cur];
87
88
89
90
91
92
93
94
95
96
97 skb = __netdev_alloc_skb(alx->dev, alx->rxbuf_size + 64, gfp);
98 if (!skb)
99 break;
100
101 if (((unsigned long)skb->data & 0xfff) == 0xfc0)
102 skb_reserve(skb, 64);
103
104 dma = dma_map_single(&alx->hw.pdev->dev,
105 skb->data, alx->rxbuf_size,
106 DMA_FROM_DEVICE);
107 if (dma_mapping_error(&alx->hw.pdev->dev, dma)) {
108 dev_kfree_skb(skb);
109 break;
110 }
111
112
113
114
115 if (WARN_ON(dma & 3)) {
116 dev_kfree_skb(skb);
117 break;
118 }
119
120 cur_buf->skb = skb;
121 dma_unmap_len_set(cur_buf, size, alx->rxbuf_size);
122 dma_unmap_addr_set(cur_buf, dma, dma);
123 rfd->addr = cpu_to_le64(dma);
124
125 cur = next;
126 if (++next == alx->rx_ringsz)
127 next = 0;
128 cur_buf = &rxq->bufs[cur];
129 count++;
130 }
131
132 if (count) {
133
134 wmb();
135 rxq->write_idx = cur;
136 alx_write_mem16(&alx->hw, ALX_RFD_PIDX, cur);
137 }
138
139 return count;
140}
141
142static struct alx_tx_queue *alx_tx_queue_mapping(struct alx_priv *alx,
143 struct sk_buff *skb)
144{
145 unsigned int r_idx = skb->queue_mapping;
146
147 if (r_idx >= alx->num_txq)
148 r_idx = r_idx % alx->num_txq;
149
150 return alx->qnapi[r_idx]->txq;
151}
152
153static struct netdev_queue *alx_get_tx_queue(const struct alx_tx_queue *txq)
154{
155 return netdev_get_tx_queue(txq->netdev, txq->queue_idx);
156}
157
158static inline int alx_tpd_avail(struct alx_tx_queue *txq)
159{
160 if (txq->write_idx >= txq->read_idx)
161 return txq->count + txq->read_idx - txq->write_idx - 1;
162 return txq->read_idx - txq->write_idx - 1;
163}
164
165static bool alx_clean_tx_irq(struct alx_tx_queue *txq)
166{
167 struct alx_priv *alx;
168 struct netdev_queue *tx_queue;
169 u16 hw_read_idx, sw_read_idx;
170 unsigned int total_bytes = 0, total_packets = 0;
171 int budget = ALX_DEFAULT_TX_WORK;
172
173 alx = netdev_priv(txq->netdev);
174 tx_queue = alx_get_tx_queue(txq);
175
176 sw_read_idx = txq->read_idx;
177 hw_read_idx = alx_read_mem16(&alx->hw, txq->c_reg);
178
179 if (sw_read_idx != hw_read_idx) {
180 while (sw_read_idx != hw_read_idx && budget > 0) {
181 struct sk_buff *skb;
182
183 skb = txq->bufs[sw_read_idx].skb;
184 if (skb) {
185 total_bytes += skb->len;
186 total_packets++;
187 budget--;
188 }
189
190 alx_free_txbuf(txq, sw_read_idx);
191
192 if (++sw_read_idx == txq->count)
193 sw_read_idx = 0;
194 }
195 txq->read_idx = sw_read_idx;
196
197 netdev_tx_completed_queue(tx_queue, total_packets, total_bytes);
198 }
199
200 if (netif_tx_queue_stopped(tx_queue) && netif_carrier_ok(alx->dev) &&
201 alx_tpd_avail(txq) > txq->count / 4)
202 netif_tx_wake_queue(tx_queue);
203
204 return sw_read_idx == hw_read_idx;
205}
206
207static void alx_schedule_link_check(struct alx_priv *alx)
208{
209 schedule_work(&alx->link_check_wk);
210}
211
212static void alx_schedule_reset(struct alx_priv *alx)
213{
214 schedule_work(&alx->reset_wk);
215}
216
217static int alx_clean_rx_irq(struct alx_rx_queue *rxq, int budget)
218{
219 struct alx_priv *alx;
220 struct alx_rrd *rrd;
221 struct alx_buffer *rxb;
222 struct sk_buff *skb;
223 u16 length, rfd_cleaned = 0;
224 int work = 0;
225
226 alx = netdev_priv(rxq->netdev);
227
228 while (work < budget) {
229 rrd = &rxq->rrd[rxq->rrd_read_idx];
230 if (!(rrd->word3 & cpu_to_le32(1 << RRD_UPDATED_SHIFT)))
231 break;
232 rrd->word3 &= ~cpu_to_le32(1 << RRD_UPDATED_SHIFT);
233
234 if (ALX_GET_FIELD(le32_to_cpu(rrd->word0),
235 RRD_SI) != rxq->read_idx ||
236 ALX_GET_FIELD(le32_to_cpu(rrd->word0),
237 RRD_NOR) != 1) {
238 alx_schedule_reset(alx);
239 return work;
240 }
241
242 rxb = &rxq->bufs[rxq->read_idx];
243 dma_unmap_single(rxq->dev,
244 dma_unmap_addr(rxb, dma),
245 dma_unmap_len(rxb, size),
246 DMA_FROM_DEVICE);
247 dma_unmap_len_set(rxb, size, 0);
248 skb = rxb->skb;
249 rxb->skb = NULL;
250
251 if (rrd->word3 & cpu_to_le32(1 << RRD_ERR_RES_SHIFT) ||
252 rrd->word3 & cpu_to_le32(1 << RRD_ERR_LEN_SHIFT)) {
253 rrd->word3 = 0;
254 dev_kfree_skb_any(skb);
255 goto next_pkt;
256 }
257
258 length = ALX_GET_FIELD(le32_to_cpu(rrd->word3),
259 RRD_PKTLEN) - ETH_FCS_LEN;
260 skb_put(skb, length);
261 skb->protocol = eth_type_trans(skb, rxq->netdev);
262
263 skb_checksum_none_assert(skb);
264 if (alx->dev->features & NETIF_F_RXCSUM &&
265 !(rrd->word3 & (cpu_to_le32(1 << RRD_ERR_L4_SHIFT) |
266 cpu_to_le32(1 << RRD_ERR_IPV4_SHIFT)))) {
267 switch (ALX_GET_FIELD(le32_to_cpu(rrd->word2),
268 RRD_PID)) {
269 case RRD_PID_IPV6UDP:
270 case RRD_PID_IPV4UDP:
271 case RRD_PID_IPV4TCP:
272 case RRD_PID_IPV6TCP:
273 skb->ip_summed = CHECKSUM_UNNECESSARY;
274 break;
275 }
276 }
277
278 napi_gro_receive(&rxq->np->napi, skb);
279 work++;
280
281next_pkt:
282 if (++rxq->read_idx == rxq->count)
283 rxq->read_idx = 0;
284 if (++rxq->rrd_read_idx == rxq->count)
285 rxq->rrd_read_idx = 0;
286
287 if (++rfd_cleaned > ALX_RX_ALLOC_THRESH)
288 rfd_cleaned -= alx_refill_rx_ring(alx, GFP_ATOMIC);
289 }
290
291 if (rfd_cleaned)
292 alx_refill_rx_ring(alx, GFP_ATOMIC);
293
294 return work;
295}
296
297static int alx_poll(struct napi_struct *napi, int budget)
298{
299 struct alx_napi *np = container_of(napi, struct alx_napi, napi);
300 struct alx_priv *alx = np->alx;
301 struct alx_hw *hw = &alx->hw;
302 unsigned long flags;
303 bool tx_complete = true;
304 int work = 0;
305
306 if (np->txq)
307 tx_complete = alx_clean_tx_irq(np->txq);
308 if (np->rxq)
309 work = alx_clean_rx_irq(np->rxq, budget);
310
311 if (!tx_complete || work == budget)
312 return budget;
313
314 napi_complete_done(&np->napi, work);
315
316
317 if (alx->hw.pdev->msix_enabled) {
318 alx_mask_msix(hw, np->vec_idx, false);
319 } else {
320 spin_lock_irqsave(&alx->irq_lock, flags);
321 alx->int_mask |= ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0;
322 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
323 spin_unlock_irqrestore(&alx->irq_lock, flags);
324 }
325
326 alx_post_write(hw);
327
328 return work;
329}
330
331static bool alx_intr_handle_misc(struct alx_priv *alx, u32 intr)
332{
333 struct alx_hw *hw = &alx->hw;
334
335 if (intr & ALX_ISR_FATAL) {
336 netif_warn(alx, hw, alx->dev,
337 "fatal interrupt 0x%x, resetting\n", intr);
338 alx_schedule_reset(alx);
339 return true;
340 }
341
342 if (intr & ALX_ISR_ALERT)
343 netdev_warn(alx->dev, "alert interrupt: 0x%x\n", intr);
344
345 if (intr & ALX_ISR_PHY) {
346
347
348
349
350 alx->int_mask &= ~ALX_ISR_PHY;
351 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
352 alx_schedule_link_check(alx);
353 }
354
355 return false;
356}
357
358static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr)
359{
360 struct alx_hw *hw = &alx->hw;
361
362 spin_lock(&alx->irq_lock);
363
364
365 alx_write_mem32(hw, ALX_ISR, intr | ALX_ISR_DIS);
366 intr &= alx->int_mask;
367
368 if (alx_intr_handle_misc(alx, intr))
369 goto out;
370
371 if (intr & (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)) {
372 napi_schedule(&alx->qnapi[0]->napi);
373
374 alx->int_mask &= ~ALX_ISR_ALL_QUEUES;
375 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
376 }
377
378 alx_write_mem32(hw, ALX_ISR, 0);
379
380 out:
381 spin_unlock(&alx->irq_lock);
382 return IRQ_HANDLED;
383}
384
385static irqreturn_t alx_intr_msix_ring(int irq, void *data)
386{
387 struct alx_napi *np = data;
388 struct alx_hw *hw = &np->alx->hw;
389
390
391 alx_mask_msix(hw, np->vec_idx, true);
392
393 alx_write_mem32(hw, ALX_ISR, np->vec_mask);
394
395 napi_schedule(&np->napi);
396
397 return IRQ_HANDLED;
398}
399
400static irqreturn_t alx_intr_msix_misc(int irq, void *data)
401{
402 struct alx_priv *alx = data;
403 struct alx_hw *hw = &alx->hw;
404 u32 intr;
405
406
407 alx_mask_msix(hw, 0, true);
408
409
410 intr = alx_read_mem32(hw, ALX_ISR);
411 intr &= (alx->int_mask & ~ALX_ISR_ALL_QUEUES);
412
413 if (alx_intr_handle_misc(alx, intr))
414 return IRQ_HANDLED;
415
416
417 alx_write_mem32(hw, ALX_ISR, intr);
418
419
420 alx_mask_msix(hw, 0, false);
421
422 return IRQ_HANDLED;
423}
424
425static irqreturn_t alx_intr_msi(int irq, void *data)
426{
427 struct alx_priv *alx = data;
428
429 return alx_intr_handle(alx, alx_read_mem32(&alx->hw, ALX_ISR));
430}
431
432static irqreturn_t alx_intr_legacy(int irq, void *data)
433{
434 struct alx_priv *alx = data;
435 struct alx_hw *hw = &alx->hw;
436 u32 intr;
437
438 intr = alx_read_mem32(hw, ALX_ISR);
439
440 if (intr & ALX_ISR_DIS || !(intr & alx->int_mask))
441 return IRQ_NONE;
442
443 return alx_intr_handle(alx, intr);
444}
445
446static const u16 txring_header_reg[] = {ALX_TPD_PRI0_ADDR_LO,
447 ALX_TPD_PRI1_ADDR_LO,
448 ALX_TPD_PRI2_ADDR_LO,
449 ALX_TPD_PRI3_ADDR_LO};
450
451static void alx_init_ring_ptrs(struct alx_priv *alx)
452{
453 struct alx_hw *hw = &alx->hw;
454 u32 addr_hi = ((u64)alx->descmem.dma) >> 32;
455 struct alx_napi *np;
456 int i;
457
458 for (i = 0; i < alx->num_napi; i++) {
459 np = alx->qnapi[i];
460 if (np->txq) {
461 np->txq->read_idx = 0;
462 np->txq->write_idx = 0;
463 alx_write_mem32(hw,
464 txring_header_reg[np->txq->queue_idx],
465 np->txq->tpd_dma);
466 }
467
468 if (np->rxq) {
469 np->rxq->read_idx = 0;
470 np->rxq->write_idx = 0;
471 np->rxq->rrd_read_idx = 0;
472 alx_write_mem32(hw, ALX_RRD_ADDR_LO, np->rxq->rrd_dma);
473 alx_write_mem32(hw, ALX_RFD_ADDR_LO, np->rxq->rfd_dma);
474 }
475 }
476
477 alx_write_mem32(hw, ALX_TX_BASE_ADDR_HI, addr_hi);
478 alx_write_mem32(hw, ALX_TPD_RING_SZ, alx->tx_ringsz);
479
480 alx_write_mem32(hw, ALX_RX_BASE_ADDR_HI, addr_hi);
481 alx_write_mem32(hw, ALX_RRD_RING_SZ, alx->rx_ringsz);
482 alx_write_mem32(hw, ALX_RFD_RING_SZ, alx->rx_ringsz);
483 alx_write_mem32(hw, ALX_RFD_BUF_SZ, alx->rxbuf_size);
484
485
486 alx_write_mem32(hw, ALX_SRAM9, ALX_SRAM_LOAD_PTR);
487}
488
489static void alx_free_txring_buf(struct alx_tx_queue *txq)
490{
491 int i;
492
493 if (!txq->bufs)
494 return;
495
496 for (i = 0; i < txq->count; i++)
497 alx_free_txbuf(txq, i);
498
499 memset(txq->bufs, 0, txq->count * sizeof(struct alx_buffer));
500 memset(txq->tpd, 0, txq->count * sizeof(struct alx_txd));
501 txq->write_idx = 0;
502 txq->read_idx = 0;
503
504 netdev_tx_reset_queue(alx_get_tx_queue(txq));
505}
506
507static void alx_free_rxring_buf(struct alx_rx_queue *rxq)
508{
509 struct alx_buffer *cur_buf;
510 u16 i;
511
512 if (!rxq->bufs)
513 return;
514
515 for (i = 0; i < rxq->count; i++) {
516 cur_buf = rxq->bufs + i;
517 if (cur_buf->skb) {
518 dma_unmap_single(rxq->dev,
519 dma_unmap_addr(cur_buf, dma),
520 dma_unmap_len(cur_buf, size),
521 DMA_FROM_DEVICE);
522 dev_kfree_skb(cur_buf->skb);
523 cur_buf->skb = NULL;
524 dma_unmap_len_set(cur_buf, size, 0);
525 dma_unmap_addr_set(cur_buf, dma, 0);
526 }
527 }
528
529 rxq->write_idx = 0;
530 rxq->read_idx = 0;
531 rxq->rrd_read_idx = 0;
532}
533
534static void alx_free_buffers(struct alx_priv *alx)
535{
536 int i;
537
538 for (i = 0; i < alx->num_txq; i++)
539 if (alx->qnapi[i] && alx->qnapi[i]->txq)
540 alx_free_txring_buf(alx->qnapi[i]->txq);
541
542 if (alx->qnapi[0] && alx->qnapi[0]->rxq)
543 alx_free_rxring_buf(alx->qnapi[0]->rxq);
544}
545
546static int alx_reinit_rings(struct alx_priv *alx)
547{
548 alx_free_buffers(alx);
549
550 alx_init_ring_ptrs(alx);
551
552 if (!alx_refill_rx_ring(alx, GFP_KERNEL))
553 return -ENOMEM;
554
555 return 0;
556}
557
558static void alx_add_mc_addr(struct alx_hw *hw, const u8 *addr, u32 *mc_hash)
559{
560 u32 crc32, bit, reg;
561
562 crc32 = ether_crc(ETH_ALEN, addr);
563 reg = (crc32 >> 31) & 0x1;
564 bit = (crc32 >> 26) & 0x1F;
565
566 mc_hash[reg] |= BIT(bit);
567}
568
569static void __alx_set_rx_mode(struct net_device *netdev)
570{
571 struct alx_priv *alx = netdev_priv(netdev);
572 struct alx_hw *hw = &alx->hw;
573 struct netdev_hw_addr *ha;
574 u32 mc_hash[2] = {};
575
576 if (!(netdev->flags & IFF_ALLMULTI)) {
577 netdev_for_each_mc_addr(ha, netdev)
578 alx_add_mc_addr(hw, ha->addr, mc_hash);
579
580 alx_write_mem32(hw, ALX_HASH_TBL0, mc_hash[0]);
581 alx_write_mem32(hw, ALX_HASH_TBL1, mc_hash[1]);
582 }
583
584 hw->rx_ctrl &= ~(ALX_MAC_CTRL_MULTIALL_EN | ALX_MAC_CTRL_PROMISC_EN);
585 if (netdev->flags & IFF_PROMISC)
586 hw->rx_ctrl |= ALX_MAC_CTRL_PROMISC_EN;
587 if (netdev->flags & IFF_ALLMULTI)
588 hw->rx_ctrl |= ALX_MAC_CTRL_MULTIALL_EN;
589
590 alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl);
591}
592
593static void alx_set_rx_mode(struct net_device *netdev)
594{
595 __alx_set_rx_mode(netdev);
596}
597
598static int alx_set_mac_address(struct net_device *netdev, void *data)
599{
600 struct alx_priv *alx = netdev_priv(netdev);
601 struct alx_hw *hw = &alx->hw;
602 struct sockaddr *addr = data;
603
604 if (!is_valid_ether_addr(addr->sa_data))
605 return -EADDRNOTAVAIL;
606
607 if (netdev->addr_assign_type & NET_ADDR_RANDOM)
608 netdev->addr_assign_type ^= NET_ADDR_RANDOM;
609
610 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
611 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
612 alx_set_macaddr(hw, hw->mac_addr);
613
614 return 0;
615}
616
617static int alx_alloc_tx_ring(struct alx_priv *alx, struct alx_tx_queue *txq,
618 int offset)
619{
620 txq->bufs = kcalloc(txq->count, sizeof(struct alx_buffer), GFP_KERNEL);
621 if (!txq->bufs)
622 return -ENOMEM;
623
624 txq->tpd = alx->descmem.virt + offset;
625 txq->tpd_dma = alx->descmem.dma + offset;
626 offset += sizeof(struct alx_txd) * txq->count;
627
628 return offset;
629}
630
631static int alx_alloc_rx_ring(struct alx_priv *alx, struct alx_rx_queue *rxq,
632 int offset)
633{
634 rxq->bufs = kcalloc(rxq->count, sizeof(struct alx_buffer), GFP_KERNEL);
635 if (!rxq->bufs)
636 return -ENOMEM;
637
638 rxq->rrd = alx->descmem.virt + offset;
639 rxq->rrd_dma = alx->descmem.dma + offset;
640 offset += sizeof(struct alx_rrd) * rxq->count;
641
642 rxq->rfd = alx->descmem.virt + offset;
643 rxq->rfd_dma = alx->descmem.dma + offset;
644 offset += sizeof(struct alx_rfd) * rxq->count;
645
646 return offset;
647}
648
649static int alx_alloc_rings(struct alx_priv *alx)
650{
651 int i, offset = 0;
652
653
654
655
656
657
658
659 alx->descmem.size = sizeof(struct alx_txd) * alx->tx_ringsz *
660 alx->num_txq +
661 sizeof(struct alx_rrd) * alx->rx_ringsz +
662 sizeof(struct alx_rfd) * alx->rx_ringsz;
663 alx->descmem.virt = dma_alloc_coherent(&alx->hw.pdev->dev,
664 alx->descmem.size,
665 &alx->descmem.dma, GFP_KERNEL);
666 if (!alx->descmem.virt)
667 return -ENOMEM;
668
669
670 BUILD_BUG_ON(sizeof(struct alx_txd) % 8);
671 BUILD_BUG_ON(sizeof(struct alx_rrd) % 8);
672
673 for (i = 0; i < alx->num_txq; i++) {
674 offset = alx_alloc_tx_ring(alx, alx->qnapi[i]->txq, offset);
675 if (offset < 0) {
676 netdev_err(alx->dev, "Allocation of tx buffer failed!\n");
677 return -ENOMEM;
678 }
679 }
680
681 offset = alx_alloc_rx_ring(alx, alx->qnapi[0]->rxq, offset);
682 if (offset < 0) {
683 netdev_err(alx->dev, "Allocation of rx buffer failed!\n");
684 return -ENOMEM;
685 }
686
687 return 0;
688}
689
690static void alx_free_rings(struct alx_priv *alx)
691{
692 int i;
693
694 alx_free_buffers(alx);
695
696 for (i = 0; i < alx->num_txq; i++)
697 if (alx->qnapi[i] && alx->qnapi[i]->txq)
698 kfree(alx->qnapi[i]->txq->bufs);
699
700 if (alx->qnapi[0] && alx->qnapi[0]->rxq)
701 kfree(alx->qnapi[0]->rxq->bufs);
702
703 if (alx->descmem.virt)
704 dma_free_coherent(&alx->hw.pdev->dev,
705 alx->descmem.size,
706 alx->descmem.virt,
707 alx->descmem.dma);
708}
709
710static void alx_free_napis(struct alx_priv *alx)
711{
712 struct alx_napi *np;
713 int i;
714
715 for (i = 0; i < alx->num_napi; i++) {
716 np = alx->qnapi[i];
717 if (!np)
718 continue;
719
720 netif_napi_del(&np->napi);
721 kfree(np->txq);
722 kfree(np->rxq);
723 kfree(np);
724 alx->qnapi[i] = NULL;
725 }
726}
727
728static const u16 tx_pidx_reg[] = {ALX_TPD_PRI0_PIDX, ALX_TPD_PRI1_PIDX,
729 ALX_TPD_PRI2_PIDX, ALX_TPD_PRI3_PIDX};
730static const u16 tx_cidx_reg[] = {ALX_TPD_PRI0_CIDX, ALX_TPD_PRI1_CIDX,
731 ALX_TPD_PRI2_CIDX, ALX_TPD_PRI3_CIDX};
732static const u32 tx_vect_mask[] = {ALX_ISR_TX_Q0, ALX_ISR_TX_Q1,
733 ALX_ISR_TX_Q2, ALX_ISR_TX_Q3};
734static const u32 rx_vect_mask[] = {ALX_ISR_RX_Q0, ALX_ISR_RX_Q1,
735 ALX_ISR_RX_Q2, ALX_ISR_RX_Q3,
736 ALX_ISR_RX_Q4, ALX_ISR_RX_Q5,
737 ALX_ISR_RX_Q6, ALX_ISR_RX_Q7};
738
739static int alx_alloc_napis(struct alx_priv *alx)
740{
741 struct alx_napi *np;
742 struct alx_rx_queue *rxq;
743 struct alx_tx_queue *txq;
744 int i;
745
746 alx->int_mask &= ~ALX_ISR_ALL_QUEUES;
747
748
749 for (i = 0; i < alx->num_napi; i++) {
750 np = kzalloc(sizeof(struct alx_napi), GFP_KERNEL);
751 if (!np)
752 goto err_out;
753
754 np->alx = alx;
755 netif_napi_add(alx->dev, &np->napi, alx_poll, 64);
756 alx->qnapi[i] = np;
757 }
758
759
760 for (i = 0; i < alx->num_txq; i++) {
761 np = alx->qnapi[i];
762 txq = kzalloc(sizeof(*txq), GFP_KERNEL);
763 if (!txq)
764 goto err_out;
765
766 np->txq = txq;
767 txq->p_reg = tx_pidx_reg[i];
768 txq->c_reg = tx_cidx_reg[i];
769 txq->queue_idx = i;
770 txq->count = alx->tx_ringsz;
771 txq->netdev = alx->dev;
772 txq->dev = &alx->hw.pdev->dev;
773 np->vec_mask |= tx_vect_mask[i];
774 alx->int_mask |= tx_vect_mask[i];
775 }
776
777
778 np = alx->qnapi[0];
779 rxq = kzalloc(sizeof(*rxq), GFP_KERNEL);
780 if (!rxq)
781 goto err_out;
782
783 np->rxq = rxq;
784 rxq->np = alx->qnapi[0];
785 rxq->queue_idx = 0;
786 rxq->count = alx->rx_ringsz;
787 rxq->netdev = alx->dev;
788 rxq->dev = &alx->hw.pdev->dev;
789 np->vec_mask |= rx_vect_mask[0];
790 alx->int_mask |= rx_vect_mask[0];
791
792 return 0;
793
794err_out:
795 netdev_err(alx->dev, "error allocating internal structures\n");
796 alx_free_napis(alx);
797 return -ENOMEM;
798}
799
800static const int txq_vec_mapping_shift[] = {
801 0, ALX_MSI_MAP_TBL1_TXQ0_SHIFT,
802 0, ALX_MSI_MAP_TBL1_TXQ1_SHIFT,
803 1, ALX_MSI_MAP_TBL2_TXQ2_SHIFT,
804 1, ALX_MSI_MAP_TBL2_TXQ3_SHIFT,
805};
806
807static void alx_config_vector_mapping(struct alx_priv *alx)
808{
809 struct alx_hw *hw = &alx->hw;
810 u32 tbl[2] = {0, 0};
811 int i, vector, idx, shift;
812
813 if (alx->hw.pdev->msix_enabled) {
814
815 for (i = 0, vector = 1; i < alx->num_txq; i++, vector++) {
816 idx = txq_vec_mapping_shift[i * 2];
817 shift = txq_vec_mapping_shift[i * 2 + 1];
818 tbl[idx] |= vector << shift;
819 }
820
821
822 tbl[0] |= 1 << ALX_MSI_MAP_TBL1_RXQ0_SHIFT;
823 }
824
825 alx_write_mem32(hw, ALX_MSI_MAP_TBL1, tbl[0]);
826 alx_write_mem32(hw, ALX_MSI_MAP_TBL2, tbl[1]);
827 alx_write_mem32(hw, ALX_MSI_ID_MAP, 0);
828}
829
830static int alx_enable_msix(struct alx_priv *alx)
831{
832 int err, num_vec, num_txq, num_rxq;
833
834 num_txq = min_t(int, num_online_cpus(), ALX_MAX_TX_QUEUES);
835 num_rxq = 1;
836 num_vec = max_t(int, num_txq, num_rxq) + 1;
837
838 err = pci_alloc_irq_vectors(alx->hw.pdev, num_vec, num_vec,
839 PCI_IRQ_MSIX);
840 if (err < 0) {
841 netdev_warn(alx->dev, "Enabling MSI-X interrupts failed!\n");
842 return err;
843 }
844
845 alx->num_vec = num_vec;
846 alx->num_napi = num_vec - 1;
847 alx->num_txq = num_txq;
848 alx->num_rxq = num_rxq;
849
850 return err;
851}
852
853static int alx_request_msix(struct alx_priv *alx)
854{
855 struct net_device *netdev = alx->dev;
856 int i, err, vector = 0, free_vector = 0;
857
858 err = request_irq(pci_irq_vector(alx->hw.pdev, 0), alx_intr_msix_misc,
859 0, netdev->name, alx);
860 if (err)
861 goto out_err;
862
863 for (i = 0; i < alx->num_napi; i++) {
864 struct alx_napi *np = alx->qnapi[i];
865
866 vector++;
867
868 if (np->txq && np->rxq)
869 sprintf(np->irq_lbl, "%s-TxRx-%u", netdev->name,
870 np->txq->queue_idx);
871 else if (np->txq)
872 sprintf(np->irq_lbl, "%s-tx-%u", netdev->name,
873 np->txq->queue_idx);
874 else if (np->rxq)
875 sprintf(np->irq_lbl, "%s-rx-%u", netdev->name,
876 np->rxq->queue_idx);
877 else
878 sprintf(np->irq_lbl, "%s-unused", netdev->name);
879
880 np->vec_idx = vector;
881 err = request_irq(pci_irq_vector(alx->hw.pdev, vector),
882 alx_intr_msix_ring, 0, np->irq_lbl, np);
883 if (err)
884 goto out_free;
885 }
886 return 0;
887
888out_free:
889 free_irq(pci_irq_vector(alx->hw.pdev, free_vector++), alx);
890
891 vector--;
892 for (i = 0; i < vector; i++)
893 free_irq(pci_irq_vector(alx->hw.pdev,free_vector++),
894 alx->qnapi[i]);
895
896out_err:
897 return err;
898}
899
900static int alx_init_intr(struct alx_priv *alx)
901{
902 int ret;
903
904 ret = pci_alloc_irq_vectors(alx->hw.pdev, 1, 1,
905 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
906 if (ret < 0)
907 return ret;
908
909 alx->num_vec = 1;
910 alx->num_napi = 1;
911 alx->num_txq = 1;
912 alx->num_rxq = 1;
913 return 0;
914}
915
916static void alx_irq_enable(struct alx_priv *alx)
917{
918 struct alx_hw *hw = &alx->hw;
919 int i;
920
921
922 alx_write_mem32(hw, ALX_ISR, 0);
923 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
924 alx_post_write(hw);
925
926 if (alx->hw.pdev->msix_enabled) {
927
928 for (i = 0; i < alx->num_vec; i++)
929 alx_mask_msix(hw, i, false);
930 }
931}
932
933static void alx_irq_disable(struct alx_priv *alx)
934{
935 struct alx_hw *hw = &alx->hw;
936 int i;
937
938 alx_write_mem32(hw, ALX_ISR, ALX_ISR_DIS);
939 alx_write_mem32(hw, ALX_IMR, 0);
940 alx_post_write(hw);
941
942 if (alx->hw.pdev->msix_enabled) {
943 for (i = 0; i < alx->num_vec; i++) {
944 alx_mask_msix(hw, i, true);
945 synchronize_irq(pci_irq_vector(alx->hw.pdev, i));
946 }
947 } else {
948 synchronize_irq(pci_irq_vector(alx->hw.pdev, 0));
949 }
950}
951
952static int alx_realloc_resources(struct alx_priv *alx)
953{
954 int err;
955
956 alx_free_rings(alx);
957 alx_free_napis(alx);
958 pci_free_irq_vectors(alx->hw.pdev);
959
960 err = alx_init_intr(alx);
961 if (err)
962 return err;
963
964 err = alx_alloc_napis(alx);
965 if (err)
966 return err;
967
968 err = alx_alloc_rings(alx);
969 if (err)
970 return err;
971
972 return 0;
973}
974
975static int alx_request_irq(struct alx_priv *alx)
976{
977 struct pci_dev *pdev = alx->hw.pdev;
978 struct alx_hw *hw = &alx->hw;
979 int err;
980 u32 msi_ctrl;
981
982 msi_ctrl = (hw->imt >> 1) << ALX_MSI_RETRANS_TM_SHIFT;
983
984 if (alx->hw.pdev->msix_enabled) {
985 alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, msi_ctrl);
986 err = alx_request_msix(alx);
987 if (!err)
988 goto out;
989
990
991 err = alx_realloc_resources(alx);
992 if (err)
993 goto out;
994 }
995
996 if (alx->hw.pdev->msi_enabled) {
997 alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER,
998 msi_ctrl | ALX_MSI_MASK_SEL_LINE);
999 err = request_irq(pci_irq_vector(pdev, 0), alx_intr_msi, 0,
1000 alx->dev->name, alx);
1001 if (!err)
1002 goto out;
1003
1004
1005 pci_free_irq_vectors(alx->hw.pdev);
1006 }
1007
1008 alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, 0);
1009 err = request_irq(pci_irq_vector(pdev, 0), alx_intr_legacy, IRQF_SHARED,
1010 alx->dev->name, alx);
1011out:
1012 if (!err)
1013 alx_config_vector_mapping(alx);
1014 else
1015 netdev_err(alx->dev, "IRQ registration failed!\n");
1016 return err;
1017}
1018
1019static void alx_free_irq(struct alx_priv *alx)
1020{
1021 struct pci_dev *pdev = alx->hw.pdev;
1022 int i;
1023
1024 free_irq(pci_irq_vector(pdev, 0), alx);
1025 if (alx->hw.pdev->msix_enabled) {
1026 for (i = 0; i < alx->num_napi; i++)
1027 free_irq(pci_irq_vector(pdev, i + 1), alx->qnapi[i]);
1028 }
1029
1030 pci_free_irq_vectors(pdev);
1031}
1032
1033static int alx_identify_hw(struct alx_priv *alx)
1034{
1035 struct alx_hw *hw = &alx->hw;
1036 int rev = alx_hw_revision(hw);
1037
1038 if (rev > ALX_REV_C0)
1039 return -EINVAL;
1040
1041 hw->max_dma_chnl = rev >= ALX_REV_B0 ? 4 : 2;
1042
1043 return 0;
1044}
1045
1046static int alx_init_sw(struct alx_priv *alx)
1047{
1048 struct pci_dev *pdev = alx->hw.pdev;
1049 struct alx_hw *hw = &alx->hw;
1050 int err;
1051
1052 err = alx_identify_hw(alx);
1053 if (err) {
1054 dev_err(&pdev->dev, "unrecognized chip, aborting\n");
1055 return err;
1056 }
1057
1058 alx->hw.lnk_patch =
1059 pdev->device == ALX_DEV_ID_AR8161 &&
1060 pdev->subsystem_vendor == PCI_VENDOR_ID_ATTANSIC &&
1061 pdev->subsystem_device == 0x0091 &&
1062 pdev->revision == 0;
1063
1064 hw->smb_timer = 400;
1065 hw->mtu = alx->dev->mtu;
1066 alx->rxbuf_size = ALX_MAX_FRAME_LEN(hw->mtu);
1067
1068 alx->dev->min_mtu = 34;
1069 alx->dev->max_mtu = ALX_MAX_FRAME_LEN(ALX_MAX_FRAME_SIZE);
1070 alx->tx_ringsz = 256;
1071 alx->rx_ringsz = 512;
1072 hw->imt = 200;
1073 alx->int_mask = ALX_ISR_MISC;
1074 hw->dma_chnl = hw->max_dma_chnl;
1075 hw->ith_tpd = alx->tx_ringsz / 3;
1076 hw->link_speed = SPEED_UNKNOWN;
1077 hw->duplex = DUPLEX_UNKNOWN;
1078 hw->adv_cfg = ADVERTISED_Autoneg |
1079 ADVERTISED_10baseT_Half |
1080 ADVERTISED_10baseT_Full |
1081 ADVERTISED_100baseT_Full |
1082 ADVERTISED_100baseT_Half |
1083 ADVERTISED_1000baseT_Full;
1084 hw->flowctrl = ALX_FC_ANEG | ALX_FC_RX | ALX_FC_TX;
1085
1086 hw->rx_ctrl = ALX_MAC_CTRL_WOLSPED_SWEN |
1087 ALX_MAC_CTRL_MHASH_ALG_HI5B |
1088 ALX_MAC_CTRL_BRD_EN |
1089 ALX_MAC_CTRL_PCRCE |
1090 ALX_MAC_CTRL_CRCE |
1091 ALX_MAC_CTRL_RXFC_EN |
1092 ALX_MAC_CTRL_TXFC_EN |
1093 7 << ALX_MAC_CTRL_PRMBLEN_SHIFT;
1094 mutex_init(&alx->mtx);
1095
1096 return 0;
1097}
1098
1099
1100static netdev_features_t alx_fix_features(struct net_device *netdev,
1101 netdev_features_t features)
1102{
1103 if (netdev->mtu > ALX_MAX_TSO_PKT_SIZE)
1104 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
1105
1106 return features;
1107}
1108
1109static void alx_netif_stop(struct alx_priv *alx)
1110{
1111 int i;
1112
1113 netif_trans_update(alx->dev);
1114 if (netif_carrier_ok(alx->dev)) {
1115 netif_carrier_off(alx->dev);
1116 netif_tx_disable(alx->dev);
1117 for (i = 0; i < alx->num_napi; i++)
1118 napi_disable(&alx->qnapi[i]->napi);
1119 }
1120}
1121
1122static void alx_halt(struct alx_priv *alx)
1123{
1124 struct alx_hw *hw = &alx->hw;
1125
1126 lockdep_assert_held(&alx->mtx);
1127
1128 alx_netif_stop(alx);
1129 hw->link_speed = SPEED_UNKNOWN;
1130 hw->duplex = DUPLEX_UNKNOWN;
1131
1132 alx_reset_mac(hw);
1133
1134
1135 alx_enable_aspm(hw, false, false);
1136 alx_irq_disable(alx);
1137 alx_free_buffers(alx);
1138}
1139
1140static void alx_configure(struct alx_priv *alx)
1141{
1142 struct alx_hw *hw = &alx->hw;
1143
1144 alx_configure_basic(hw);
1145 alx_disable_rss(hw);
1146 __alx_set_rx_mode(alx->dev);
1147
1148 alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl);
1149}
1150
1151static void alx_activate(struct alx_priv *alx)
1152{
1153 lockdep_assert_held(&alx->mtx);
1154
1155
1156 alx_reinit_rings(alx);
1157 alx_configure(alx);
1158
1159
1160 alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS);
1161
1162 alx_irq_enable(alx);
1163
1164 alx_schedule_link_check(alx);
1165}
1166
1167static void alx_reinit(struct alx_priv *alx)
1168{
1169 lockdep_assert_held(&alx->mtx);
1170
1171 alx_halt(alx);
1172 alx_activate(alx);
1173}
1174
1175static int alx_change_mtu(struct net_device *netdev, int mtu)
1176{
1177 struct alx_priv *alx = netdev_priv(netdev);
1178 int max_frame = ALX_MAX_FRAME_LEN(mtu);
1179
1180 netdev->mtu = mtu;
1181 alx->hw.mtu = mtu;
1182 alx->rxbuf_size = max(max_frame, ALX_DEF_RXBUF_SIZE);
1183 netdev_update_features(netdev);
1184 if (netif_running(netdev))
1185 alx_reinit(alx);
1186 return 0;
1187}
1188
1189static void alx_netif_start(struct alx_priv *alx)
1190{
1191 int i;
1192
1193 netif_tx_wake_all_queues(alx->dev);
1194 for (i = 0; i < alx->num_napi; i++)
1195 napi_enable(&alx->qnapi[i]->napi);
1196 netif_carrier_on(alx->dev);
1197}
1198
1199static int __alx_open(struct alx_priv *alx, bool resume)
1200{
1201 int err;
1202
1203 err = alx_enable_msix(alx);
1204 if (err < 0) {
1205 err = alx_init_intr(alx);
1206 if (err)
1207 return err;
1208 }
1209
1210 if (!resume)
1211 netif_carrier_off(alx->dev);
1212
1213 err = alx_alloc_napis(alx);
1214 if (err)
1215 goto out_disable_adv_intr;
1216
1217 err = alx_alloc_rings(alx);
1218 if (err)
1219 goto out_free_rings;
1220
1221 alx_configure(alx);
1222
1223 err = alx_request_irq(alx);
1224 if (err)
1225 goto out_free_rings;
1226
1227
1228
1229
1230
1231 alx_reinit_rings(alx);
1232
1233 netif_set_real_num_tx_queues(alx->dev, alx->num_txq);
1234 netif_set_real_num_rx_queues(alx->dev, alx->num_rxq);
1235
1236
1237 alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS);
1238
1239 alx_irq_enable(alx);
1240
1241 if (!resume)
1242 netif_tx_start_all_queues(alx->dev);
1243
1244 alx_schedule_link_check(alx);
1245 return 0;
1246
1247out_free_rings:
1248 alx_free_rings(alx);
1249 alx_free_napis(alx);
1250out_disable_adv_intr:
1251 pci_free_irq_vectors(alx->hw.pdev);
1252 return err;
1253}
1254
1255static void __alx_stop(struct alx_priv *alx)
1256{
1257 lockdep_assert_held(&alx->mtx);
1258
1259 alx_free_irq(alx);
1260
1261 cancel_work_sync(&alx->link_check_wk);
1262 cancel_work_sync(&alx->reset_wk);
1263
1264 alx_halt(alx);
1265 alx_free_rings(alx);
1266 alx_free_napis(alx);
1267}
1268
1269static const char *alx_speed_desc(struct alx_hw *hw)
1270{
1271 switch (alx_speed_to_ethadv(hw->link_speed, hw->duplex)) {
1272 case ADVERTISED_1000baseT_Full:
1273 return "1 Gbps Full";
1274 case ADVERTISED_100baseT_Full:
1275 return "100 Mbps Full";
1276 case ADVERTISED_100baseT_Half:
1277 return "100 Mbps Half";
1278 case ADVERTISED_10baseT_Full:
1279 return "10 Mbps Full";
1280 case ADVERTISED_10baseT_Half:
1281 return "10 Mbps Half";
1282 default:
1283 return "Unknown speed";
1284 }
1285}
1286
1287static void alx_check_link(struct alx_priv *alx)
1288{
1289 struct alx_hw *hw = &alx->hw;
1290 unsigned long flags;
1291 int old_speed;
1292 int err;
1293
1294 lockdep_assert_held(&alx->mtx);
1295
1296
1297
1298
1299 alx_clear_phy_intr(hw);
1300
1301 old_speed = hw->link_speed;
1302 err = alx_read_phy_link(hw);
1303 if (err < 0)
1304 goto reset;
1305
1306 spin_lock_irqsave(&alx->irq_lock, flags);
1307 alx->int_mask |= ALX_ISR_PHY;
1308 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
1309 spin_unlock_irqrestore(&alx->irq_lock, flags);
1310
1311 if (old_speed == hw->link_speed)
1312 return;
1313
1314 if (hw->link_speed != SPEED_UNKNOWN) {
1315 netif_info(alx, link, alx->dev,
1316 "NIC Up: %s\n", alx_speed_desc(hw));
1317 alx_post_phy_link(hw);
1318 alx_enable_aspm(hw, true, true);
1319 alx_start_mac(hw);
1320
1321 if (old_speed == SPEED_UNKNOWN)
1322 alx_netif_start(alx);
1323 } else {
1324
1325 alx_netif_stop(alx);
1326 netif_info(alx, link, alx->dev, "Link Down\n");
1327 err = alx_reset_mac(hw);
1328 if (err)
1329 goto reset;
1330 alx_irq_disable(alx);
1331
1332
1333 err = alx_reinit_rings(alx);
1334 if (err)
1335 goto reset;
1336 alx_configure(alx);
1337 alx_enable_aspm(hw, false, true);
1338 alx_post_phy_link(hw);
1339 alx_irq_enable(alx);
1340 }
1341
1342 return;
1343
1344reset:
1345 alx_schedule_reset(alx);
1346}
1347
1348static int alx_open(struct net_device *netdev)
1349{
1350 struct alx_priv *alx = netdev_priv(netdev);
1351 int ret;
1352
1353 mutex_lock(&alx->mtx);
1354 ret = __alx_open(alx, false);
1355 mutex_unlock(&alx->mtx);
1356
1357 return ret;
1358}
1359
1360static int alx_stop(struct net_device *netdev)
1361{
1362 struct alx_priv *alx = netdev_priv(netdev);
1363
1364 mutex_lock(&alx->mtx);
1365 __alx_stop(alx);
1366 mutex_unlock(&alx->mtx);
1367
1368 return 0;
1369}
1370
1371static void alx_link_check(struct work_struct *work)
1372{
1373 struct alx_priv *alx;
1374
1375 alx = container_of(work, struct alx_priv, link_check_wk);
1376
1377 mutex_lock(&alx->mtx);
1378 alx_check_link(alx);
1379 mutex_unlock(&alx->mtx);
1380}
1381
1382static void alx_reset(struct work_struct *work)
1383{
1384 struct alx_priv *alx = container_of(work, struct alx_priv, reset_wk);
1385
1386 mutex_lock(&alx->mtx);
1387 alx_reinit(alx);
1388 mutex_unlock(&alx->mtx);
1389}
1390
1391static int alx_tpd_req(struct sk_buff *skb)
1392{
1393 int num;
1394
1395 num = skb_shinfo(skb)->nr_frags + 1;
1396
1397 if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1398 num++;
1399
1400 return num;
1401}
1402
1403static int alx_tx_csum(struct sk_buff *skb, struct alx_txd *first)
1404{
1405 u8 cso, css;
1406
1407 if (skb->ip_summed != CHECKSUM_PARTIAL)
1408 return 0;
1409
1410 cso = skb_checksum_start_offset(skb);
1411 if (cso & 1)
1412 return -EINVAL;
1413
1414 css = cso + skb->csum_offset;
1415 first->word1 |= cpu_to_le32((cso >> 1) << TPD_CXSUMSTART_SHIFT);
1416 first->word1 |= cpu_to_le32((css >> 1) << TPD_CXSUMOFFSET_SHIFT);
1417 first->word1 |= cpu_to_le32(1 << TPD_CXSUM_EN_SHIFT);
1418
1419 return 0;
1420}
1421
1422static int alx_tso(struct sk_buff *skb, struct alx_txd *first)
1423{
1424 int err;
1425
1426 if (skb->ip_summed != CHECKSUM_PARTIAL)
1427 return 0;
1428
1429 if (!skb_is_gso(skb))
1430 return 0;
1431
1432 err = skb_cow_head(skb, 0);
1433 if (err < 0)
1434 return err;
1435
1436 if (skb->protocol == htons(ETH_P_IP)) {
1437 struct iphdr *iph = ip_hdr(skb);
1438
1439 iph->check = 0;
1440 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
1441 0, IPPROTO_TCP, 0);
1442 first->word1 |= 1 << TPD_IPV4_SHIFT;
1443 } else if (skb_is_gso_v6(skb)) {
1444 tcp_v6_gso_csum_prep(skb);
1445
1446 first->adrl.l.pkt_len = skb->len;
1447 first->word1 |= 1 << TPD_LSO_V2_SHIFT;
1448 }
1449
1450 first->word1 |= 1 << TPD_LSO_EN_SHIFT;
1451 first->word1 |= (skb_transport_offset(skb) &
1452 TPD_L4HDROFFSET_MASK) << TPD_L4HDROFFSET_SHIFT;
1453 first->word1 |= (skb_shinfo(skb)->gso_size &
1454 TPD_MSS_MASK) << TPD_MSS_SHIFT;
1455 return 1;
1456}
1457
1458static int alx_map_tx_skb(struct alx_tx_queue *txq, struct sk_buff *skb)
1459{
1460 struct alx_txd *tpd, *first_tpd;
1461 dma_addr_t dma;
1462 int maplen, f, first_idx = txq->write_idx;
1463
1464 first_tpd = &txq->tpd[txq->write_idx];
1465 tpd = first_tpd;
1466
1467 if (tpd->word1 & (1 << TPD_LSO_V2_SHIFT)) {
1468 if (++txq->write_idx == txq->count)
1469 txq->write_idx = 0;
1470
1471 tpd = &txq->tpd[txq->write_idx];
1472 tpd->len = first_tpd->len;
1473 tpd->vlan_tag = first_tpd->vlan_tag;
1474 tpd->word1 = first_tpd->word1;
1475 }
1476
1477 maplen = skb_headlen(skb);
1478 dma = dma_map_single(txq->dev, skb->data, maplen,
1479 DMA_TO_DEVICE);
1480 if (dma_mapping_error(txq->dev, dma))
1481 goto err_dma;
1482
1483 dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen);
1484 dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma);
1485
1486 tpd->adrl.addr = cpu_to_le64(dma);
1487 tpd->len = cpu_to_le16(maplen);
1488
1489 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
1490 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1491
1492 if (++txq->write_idx == txq->count)
1493 txq->write_idx = 0;
1494 tpd = &txq->tpd[txq->write_idx];
1495
1496 tpd->word1 = first_tpd->word1;
1497
1498 maplen = skb_frag_size(frag);
1499 dma = skb_frag_dma_map(txq->dev, frag, 0,
1500 maplen, DMA_TO_DEVICE);
1501 if (dma_mapping_error(txq->dev, dma))
1502 goto err_dma;
1503 dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen);
1504 dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma);
1505
1506 tpd->adrl.addr = cpu_to_le64(dma);
1507 tpd->len = cpu_to_le16(maplen);
1508 }
1509
1510
1511 tpd->word1 |= cpu_to_le32(1 << TPD_EOP_SHIFT);
1512 txq->bufs[txq->write_idx].skb = skb;
1513
1514 if (++txq->write_idx == txq->count)
1515 txq->write_idx = 0;
1516
1517 return 0;
1518
1519err_dma:
1520 f = first_idx;
1521 while (f != txq->write_idx) {
1522 alx_free_txbuf(txq, f);
1523 if (++f == txq->count)
1524 f = 0;
1525 }
1526 return -ENOMEM;
1527}
1528
1529static netdev_tx_t alx_start_xmit_ring(struct sk_buff *skb,
1530 struct alx_tx_queue *txq)
1531{
1532 struct alx_priv *alx;
1533 struct alx_txd *first;
1534 int tso;
1535
1536 alx = netdev_priv(txq->netdev);
1537
1538 if (alx_tpd_avail(txq) < alx_tpd_req(skb)) {
1539 netif_tx_stop_queue(alx_get_tx_queue(txq));
1540 goto drop;
1541 }
1542
1543 first = &txq->tpd[txq->write_idx];
1544 memset(first, 0, sizeof(*first));
1545
1546 tso = alx_tso(skb, first);
1547 if (tso < 0)
1548 goto drop;
1549 else if (!tso && alx_tx_csum(skb, first))
1550 goto drop;
1551
1552 if (alx_map_tx_skb(txq, skb) < 0)
1553 goto drop;
1554
1555 netdev_tx_sent_queue(alx_get_tx_queue(txq), skb->len);
1556
1557
1558 wmb();
1559 alx_write_mem16(&alx->hw, txq->p_reg, txq->write_idx);
1560
1561 if (alx_tpd_avail(txq) < txq->count / 8)
1562 netif_tx_stop_queue(alx_get_tx_queue(txq));
1563
1564 return NETDEV_TX_OK;
1565
1566drop:
1567 dev_kfree_skb_any(skb);
1568 return NETDEV_TX_OK;
1569}
1570
1571static netdev_tx_t alx_start_xmit(struct sk_buff *skb,
1572 struct net_device *netdev)
1573{
1574 struct alx_priv *alx = netdev_priv(netdev);
1575 return alx_start_xmit_ring(skb, alx_tx_queue_mapping(alx, skb));
1576}
1577
1578static void alx_tx_timeout(struct net_device *dev, unsigned int txqueue)
1579{
1580 struct alx_priv *alx = netdev_priv(dev);
1581
1582 alx_schedule_reset(alx);
1583}
1584
1585static int alx_mdio_read(struct net_device *netdev,
1586 int prtad, int devad, u16 addr)
1587{
1588 struct alx_priv *alx = netdev_priv(netdev);
1589 struct alx_hw *hw = &alx->hw;
1590 u16 val;
1591 int err;
1592
1593 if (prtad != hw->mdio.prtad)
1594 return -EINVAL;
1595
1596 if (devad == MDIO_DEVAD_NONE)
1597 err = alx_read_phy_reg(hw, addr, &val);
1598 else
1599 err = alx_read_phy_ext(hw, devad, addr, &val);
1600
1601 if (err)
1602 return err;
1603 return val;
1604}
1605
1606static int alx_mdio_write(struct net_device *netdev,
1607 int prtad, int devad, u16 addr, u16 val)
1608{
1609 struct alx_priv *alx = netdev_priv(netdev);
1610 struct alx_hw *hw = &alx->hw;
1611
1612 if (prtad != hw->mdio.prtad)
1613 return -EINVAL;
1614
1615 if (devad == MDIO_DEVAD_NONE)
1616 return alx_write_phy_reg(hw, addr, val);
1617
1618 return alx_write_phy_ext(hw, devad, addr, val);
1619}
1620
1621static int alx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1622{
1623 struct alx_priv *alx = netdev_priv(netdev);
1624
1625 if (!netif_running(netdev))
1626 return -EAGAIN;
1627
1628 return mdio_mii_ioctl(&alx->hw.mdio, if_mii(ifr), cmd);
1629}
1630
1631#ifdef CONFIG_NET_POLL_CONTROLLER
1632static void alx_poll_controller(struct net_device *netdev)
1633{
1634 struct alx_priv *alx = netdev_priv(netdev);
1635 int i;
1636
1637 if (alx->hw.pdev->msix_enabled) {
1638 alx_intr_msix_misc(0, alx);
1639 for (i = 0; i < alx->num_txq; i++)
1640 alx_intr_msix_ring(0, alx->qnapi[i]);
1641 } else if (alx->hw.pdev->msi_enabled)
1642 alx_intr_msi(0, alx);
1643 else
1644 alx_intr_legacy(0, alx);
1645}
1646#endif
1647
1648static void alx_get_stats64(struct net_device *dev,
1649 struct rtnl_link_stats64 *net_stats)
1650{
1651 struct alx_priv *alx = netdev_priv(dev);
1652 struct alx_hw_stats *hw_stats = &alx->hw.stats;
1653
1654 spin_lock(&alx->stats_lock);
1655
1656 alx_update_hw_stats(&alx->hw);
1657
1658 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1659 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1660 net_stats->multicast = hw_stats->rx_mcast;
1661 net_stats->collisions = hw_stats->tx_single_col +
1662 hw_stats->tx_multi_col +
1663 hw_stats->tx_late_col +
1664 hw_stats->tx_abort_col;
1665
1666 net_stats->rx_errors = hw_stats->rx_frag +
1667 hw_stats->rx_fcs_err +
1668 hw_stats->rx_len_err +
1669 hw_stats->rx_ov_sz +
1670 hw_stats->rx_ov_rrd +
1671 hw_stats->rx_align_err +
1672 hw_stats->rx_ov_rxf;
1673
1674 net_stats->rx_fifo_errors = hw_stats->rx_ov_rxf;
1675 net_stats->rx_length_errors = hw_stats->rx_len_err;
1676 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1677 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1678 net_stats->rx_dropped = hw_stats->rx_ov_rrd;
1679
1680 net_stats->tx_errors = hw_stats->tx_late_col +
1681 hw_stats->tx_abort_col +
1682 hw_stats->tx_underrun +
1683 hw_stats->tx_trunc;
1684
1685 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1686 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1687 net_stats->tx_window_errors = hw_stats->tx_late_col;
1688
1689 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1690 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1691
1692 spin_unlock(&alx->stats_lock);
1693}
1694
1695static const struct net_device_ops alx_netdev_ops = {
1696 .ndo_open = alx_open,
1697 .ndo_stop = alx_stop,
1698 .ndo_start_xmit = alx_start_xmit,
1699 .ndo_get_stats64 = alx_get_stats64,
1700 .ndo_set_rx_mode = alx_set_rx_mode,
1701 .ndo_validate_addr = eth_validate_addr,
1702 .ndo_set_mac_address = alx_set_mac_address,
1703 .ndo_change_mtu = alx_change_mtu,
1704 .ndo_eth_ioctl = alx_ioctl,
1705 .ndo_tx_timeout = alx_tx_timeout,
1706 .ndo_fix_features = alx_fix_features,
1707#ifdef CONFIG_NET_POLL_CONTROLLER
1708 .ndo_poll_controller = alx_poll_controller,
1709#endif
1710};
1711
1712static int alx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1713{
1714 struct net_device *netdev;
1715 struct alx_priv *alx;
1716 struct alx_hw *hw;
1717 bool phy_configured;
1718 int err;
1719
1720 err = pci_enable_device_mem(pdev);
1721 if (err)
1722 return err;
1723
1724
1725
1726
1727
1728 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1729 dev_dbg(&pdev->dev, "DMA to 64-BIT addresses\n");
1730 } else {
1731 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1732 if (err) {
1733 dev_err(&pdev->dev, "No usable DMA config, aborting\n");
1734 goto out_pci_disable;
1735 }
1736 }
1737
1738 err = pci_request_mem_regions(pdev, alx_drv_name);
1739 if (err) {
1740 dev_err(&pdev->dev,
1741 "pci_request_mem_regions failed\n");
1742 goto out_pci_disable;
1743 }
1744
1745 pci_enable_pcie_error_reporting(pdev);
1746 pci_set_master(pdev);
1747
1748 if (!pdev->pm_cap) {
1749 dev_err(&pdev->dev,
1750 "Can't find power management capability, aborting\n");
1751 err = -EIO;
1752 goto out_pci_release;
1753 }
1754
1755 netdev = alloc_etherdev_mqs(sizeof(*alx),
1756 ALX_MAX_TX_QUEUES, 1);
1757 if (!netdev) {
1758 err = -ENOMEM;
1759 goto out_pci_release;
1760 }
1761
1762 SET_NETDEV_DEV(netdev, &pdev->dev);
1763 alx = netdev_priv(netdev);
1764 spin_lock_init(&alx->hw.mdio_lock);
1765 spin_lock_init(&alx->irq_lock);
1766 spin_lock_init(&alx->stats_lock);
1767 alx->dev = netdev;
1768 alx->hw.pdev = pdev;
1769 alx->msg_enable = NETIF_MSG_LINK | NETIF_MSG_HW | NETIF_MSG_IFUP |
1770 NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR | NETIF_MSG_WOL;
1771 hw = &alx->hw;
1772 pci_set_drvdata(pdev, alx);
1773
1774 hw->hw_addr = pci_ioremap_bar(pdev, 0);
1775 if (!hw->hw_addr) {
1776 dev_err(&pdev->dev, "cannot map device registers\n");
1777 err = -EIO;
1778 goto out_free_netdev;
1779 }
1780
1781 netdev->netdev_ops = &alx_netdev_ops;
1782 netdev->ethtool_ops = &alx_ethtool_ops;
1783 netdev->irq = pci_irq_vector(pdev, 0);
1784 netdev->watchdog_timeo = ALX_WATCHDOG_TIME;
1785
1786 if (ent->driver_data & ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG)
1787 pdev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
1788
1789 err = alx_init_sw(alx);
1790 if (err) {
1791 dev_err(&pdev->dev, "net device private data init failed\n");
1792 goto out_unmap;
1793 }
1794
1795 mutex_lock(&alx->mtx);
1796
1797 alx_reset_pcie(hw);
1798
1799 phy_configured = alx_phy_configured(hw);
1800
1801 if (!phy_configured)
1802 alx_reset_phy(hw);
1803
1804 err = alx_reset_mac(hw);
1805 if (err) {
1806 dev_err(&pdev->dev, "MAC Reset failed, error = %d\n", err);
1807 goto out_unlock;
1808 }
1809
1810
1811 if (!phy_configured) {
1812 err = alx_setup_speed_duplex(hw, hw->adv_cfg, hw->flowctrl);
1813 if (err) {
1814 dev_err(&pdev->dev,
1815 "failed to configure PHY speed/duplex (err=%d)\n",
1816 err);
1817 goto out_unlock;
1818 }
1819 }
1820
1821 netdev->hw_features = NETIF_F_SG |
1822 NETIF_F_HW_CSUM |
1823 NETIF_F_RXCSUM |
1824 NETIF_F_TSO |
1825 NETIF_F_TSO6;
1826
1827 if (alx_get_perm_macaddr(hw, hw->perm_addr)) {
1828 dev_warn(&pdev->dev,
1829 "Invalid permanent address programmed, using random one\n");
1830 eth_hw_addr_random(netdev);
1831 memcpy(hw->perm_addr, netdev->dev_addr, netdev->addr_len);
1832 }
1833
1834 memcpy(hw->mac_addr, hw->perm_addr, ETH_ALEN);
1835 memcpy(netdev->dev_addr, hw->mac_addr, ETH_ALEN);
1836 memcpy(netdev->perm_addr, hw->perm_addr, ETH_ALEN);
1837
1838 hw->mdio.prtad = 0;
1839 hw->mdio.mmds = 0;
1840 hw->mdio.dev = netdev;
1841 hw->mdio.mode_support = MDIO_SUPPORTS_C45 |
1842 MDIO_SUPPORTS_C22 |
1843 MDIO_EMULATE_C22;
1844 hw->mdio.mdio_read = alx_mdio_read;
1845 hw->mdio.mdio_write = alx_mdio_write;
1846
1847 if (!alx_get_phy_info(hw)) {
1848 dev_err(&pdev->dev, "failed to identify PHY\n");
1849 err = -EIO;
1850 goto out_unlock;
1851 }
1852
1853 mutex_unlock(&alx->mtx);
1854
1855 INIT_WORK(&alx->link_check_wk, alx_link_check);
1856 INIT_WORK(&alx->reset_wk, alx_reset);
1857 netif_carrier_off(netdev);
1858
1859 err = register_netdev(netdev);
1860 if (err) {
1861 dev_err(&pdev->dev, "register netdevice failed\n");
1862 goto out_unmap;
1863 }
1864
1865 netdev_info(netdev,
1866 "Qualcomm Atheros AR816x/AR817x Ethernet [%pM]\n",
1867 netdev->dev_addr);
1868
1869 return 0;
1870
1871out_unlock:
1872 mutex_unlock(&alx->mtx);
1873out_unmap:
1874 iounmap(hw->hw_addr);
1875out_free_netdev:
1876 free_netdev(netdev);
1877out_pci_release:
1878 pci_release_mem_regions(pdev);
1879 pci_disable_pcie_error_reporting(pdev);
1880out_pci_disable:
1881 pci_disable_device(pdev);
1882 return err;
1883}
1884
1885static void alx_remove(struct pci_dev *pdev)
1886{
1887 struct alx_priv *alx = pci_get_drvdata(pdev);
1888 struct alx_hw *hw = &alx->hw;
1889
1890
1891 alx_set_macaddr(hw, hw->perm_addr);
1892
1893 unregister_netdev(alx->dev);
1894 iounmap(hw->hw_addr);
1895 pci_release_mem_regions(pdev);
1896
1897 pci_disable_pcie_error_reporting(pdev);
1898 pci_disable_device(pdev);
1899
1900 mutex_destroy(&alx->mtx);
1901
1902 free_netdev(alx->dev);
1903}
1904
1905#ifdef CONFIG_PM_SLEEP
1906static int alx_suspend(struct device *dev)
1907{
1908 struct alx_priv *alx = dev_get_drvdata(dev);
1909
1910 if (!netif_running(alx->dev))
1911 return 0;
1912 netif_device_detach(alx->dev);
1913
1914 mutex_lock(&alx->mtx);
1915 __alx_stop(alx);
1916 mutex_unlock(&alx->mtx);
1917
1918 return 0;
1919}
1920
1921static int alx_resume(struct device *dev)
1922{
1923 struct alx_priv *alx = dev_get_drvdata(dev);
1924 struct alx_hw *hw = &alx->hw;
1925 int err;
1926
1927 mutex_lock(&alx->mtx);
1928 alx_reset_phy(hw);
1929
1930 if (!netif_running(alx->dev)) {
1931 err = 0;
1932 goto unlock;
1933 }
1934
1935 err = __alx_open(alx, true);
1936 if (err)
1937 goto unlock;
1938
1939 netif_device_attach(alx->dev);
1940
1941unlock:
1942 mutex_unlock(&alx->mtx);
1943 return err;
1944}
1945
1946static SIMPLE_DEV_PM_OPS(alx_pm_ops, alx_suspend, alx_resume);
1947#define ALX_PM_OPS (&alx_pm_ops)
1948#else
1949#define ALX_PM_OPS NULL
1950#endif
1951
1952
1953static pci_ers_result_t alx_pci_error_detected(struct pci_dev *pdev,
1954 pci_channel_state_t state)
1955{
1956 struct alx_priv *alx = pci_get_drvdata(pdev);
1957 struct net_device *netdev = alx->dev;
1958 pci_ers_result_t rc = PCI_ERS_RESULT_NEED_RESET;
1959
1960 dev_info(&pdev->dev, "pci error detected\n");
1961
1962 mutex_lock(&alx->mtx);
1963
1964 if (netif_running(netdev)) {
1965 netif_device_detach(netdev);
1966 alx_halt(alx);
1967 }
1968
1969 if (state == pci_channel_io_perm_failure)
1970 rc = PCI_ERS_RESULT_DISCONNECT;
1971 else
1972 pci_disable_device(pdev);
1973
1974 mutex_unlock(&alx->mtx);
1975
1976 return rc;
1977}
1978
1979static pci_ers_result_t alx_pci_error_slot_reset(struct pci_dev *pdev)
1980{
1981 struct alx_priv *alx = pci_get_drvdata(pdev);
1982 struct alx_hw *hw = &alx->hw;
1983 pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT;
1984
1985 dev_info(&pdev->dev, "pci error slot reset\n");
1986
1987 mutex_lock(&alx->mtx);
1988
1989 if (pci_enable_device(pdev)) {
1990 dev_err(&pdev->dev, "Failed to re-enable PCI device after reset\n");
1991 goto out;
1992 }
1993
1994 pci_set_master(pdev);
1995
1996 alx_reset_pcie(hw);
1997 if (!alx_reset_mac(hw))
1998 rc = PCI_ERS_RESULT_RECOVERED;
1999out:
2000 mutex_unlock(&alx->mtx);
2001
2002 return rc;
2003}
2004
2005static void alx_pci_error_resume(struct pci_dev *pdev)
2006{
2007 struct alx_priv *alx = pci_get_drvdata(pdev);
2008 struct net_device *netdev = alx->dev;
2009
2010 dev_info(&pdev->dev, "pci error resume\n");
2011
2012 mutex_lock(&alx->mtx);
2013
2014 if (netif_running(netdev)) {
2015 alx_activate(alx);
2016 netif_device_attach(netdev);
2017 }
2018
2019 mutex_unlock(&alx->mtx);
2020}
2021
2022static const struct pci_error_handlers alx_err_handlers = {
2023 .error_detected = alx_pci_error_detected,
2024 .slot_reset = alx_pci_error_slot_reset,
2025 .resume = alx_pci_error_resume,
2026};
2027
2028static const struct pci_device_id alx_pci_tbl[] = {
2029 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8161),
2030 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
2031 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2200),
2032 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
2033 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2400),
2034 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
2035 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2500),
2036 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
2037 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8162),
2038 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
2039 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8171) },
2040 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8172) },
2041 {}
2042};
2043
2044static struct pci_driver alx_driver = {
2045 .name = alx_drv_name,
2046 .id_table = alx_pci_tbl,
2047 .probe = alx_probe,
2048 .remove = alx_remove,
2049 .err_handler = &alx_err_handlers,
2050 .driver.pm = ALX_PM_OPS,
2051};
2052
2053module_pci_driver(alx_driver);
2054MODULE_DEVICE_TABLE(pci, alx_pci_tbl);
2055MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
2056MODULE_AUTHOR("Qualcomm Corporation");
2057MODULE_DESCRIPTION(
2058 "Qualcomm Atheros(R) AR816x/AR817x PCI-E Ethernet Network Driver");
2059MODULE_LICENSE("GPL");
2060