2 * Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net>
4 * This file is free software: you may copy, redistribute and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation, either version 2 of the License, or (at your
7 * option) any later version.
9 * This file is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 * This file incorporates work covered by the following copyright and
20 * Copyright (c) 2012 Qualcomm Atheros, Inc.
22 * Permission to use, copy, modify, and/or distribute this software for any
23 * purpose with or without fee is hereby granted, provided that the above
24 * copyright notice and this permission notice appear in all copies.
26 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
27 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
29 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
30 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
31 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
32 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/interrupt.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>
52 const char alx_drv_name[] = "alx";
55 static void alx_free_txbuf(struct alx_priv *alx, int entry)
57 struct alx_buffer *txb = &alx->txq.bufs[entry];
59 if (dma_unmap_len(txb, size)) {
60 dma_unmap_single(&alx->hw.pdev->dev,
61 dma_unmap_addr(txb, dma),
62 dma_unmap_len(txb, size),
64 dma_unmap_len_set(txb, size, 0);
68 dev_kfree_skb_any(txb->skb);
73 static int alx_refill_rx_ring(struct alx_priv *alx, gfp_t gfp)
75 struct alx_rx_queue *rxq = &alx->rxq;
77 struct alx_buffer *cur_buf;
79 u16 cur, next, count = 0;
81 next = cur = rxq->write_idx;
82 if (++next == alx->rx_ringsz)
84 cur_buf = &rxq->bufs[cur];
86 while (!cur_buf->skb && next != rxq->read_idx) {
87 struct alx_rfd *rfd = &rxq->rfd[cur];
89 skb = __netdev_alloc_skb(alx->dev, alx->rxbuf_size, gfp);
92 dma = dma_map_single(&alx->hw.pdev->dev,
93 skb->data, alx->rxbuf_size,
95 if (dma_mapping_error(&alx->hw.pdev->dev, dma)) {
100 /* Unfortunately, RX descriptor buffers must be 4-byte
101 * aligned, so we can't use IP alignment.
103 if (WARN_ON(dma & 3)) {
109 dma_unmap_len_set(cur_buf, size, alx->rxbuf_size);
110 dma_unmap_addr_set(cur_buf, dma, dma);
111 rfd->addr = cpu_to_le64(dma);
114 if (++next == alx->rx_ringsz)
116 cur_buf = &rxq->bufs[cur];
121 /* flush all updates before updating hardware */
123 rxq->write_idx = cur;
124 alx_write_mem16(&alx->hw, ALX_RFD_PIDX, cur);
130 static inline int alx_tpd_avail(struct alx_priv *alx)
132 struct alx_tx_queue *txq = &alx->txq;
134 if (txq->write_idx >= txq->read_idx)
135 return alx->tx_ringsz + txq->read_idx - txq->write_idx - 1;
136 return txq->read_idx - txq->write_idx - 1;
139 static bool alx_clean_tx_irq(struct alx_priv *alx)
141 struct alx_tx_queue *txq = &alx->txq;
142 u16 hw_read_idx, sw_read_idx;
143 unsigned int total_bytes = 0, total_packets = 0;
144 int budget = ALX_DEFAULT_TX_WORK;
146 sw_read_idx = txq->read_idx;
147 hw_read_idx = alx_read_mem16(&alx->hw, ALX_TPD_PRI0_CIDX);
149 if (sw_read_idx != hw_read_idx) {
150 while (sw_read_idx != hw_read_idx && budget > 0) {
153 skb = txq->bufs[sw_read_idx].skb;
155 total_bytes += skb->len;
160 alx_free_txbuf(alx, sw_read_idx);
162 if (++sw_read_idx == alx->tx_ringsz)
165 txq->read_idx = sw_read_idx;
167 netdev_completed_queue(alx->dev, total_packets, total_bytes);
170 if (netif_queue_stopped(alx->dev) && netif_carrier_ok(alx->dev) &&
171 alx_tpd_avail(alx) > alx->tx_ringsz/4)
172 netif_wake_queue(alx->dev);
174 return sw_read_idx == hw_read_idx;
177 static void alx_schedule_link_check(struct alx_priv *alx)
179 schedule_work(&alx->link_check_wk);
182 static void alx_schedule_reset(struct alx_priv *alx)
184 schedule_work(&alx->reset_wk);
187 static int alx_clean_rx_irq(struct alx_priv *alx, int budget)
189 struct alx_rx_queue *rxq = &alx->rxq;
191 struct alx_buffer *rxb;
193 u16 length, rfd_cleaned = 0;
196 while (work < budget) {
197 rrd = &rxq->rrd[rxq->rrd_read_idx];
198 if (!(rrd->word3 & cpu_to_le32(1 << RRD_UPDATED_SHIFT)))
200 rrd->word3 &= ~cpu_to_le32(1 << RRD_UPDATED_SHIFT);
202 if (ALX_GET_FIELD(le32_to_cpu(rrd->word0),
203 RRD_SI) != rxq->read_idx ||
204 ALX_GET_FIELD(le32_to_cpu(rrd->word0),
206 alx_schedule_reset(alx);
210 rxb = &rxq->bufs[rxq->read_idx];
211 dma_unmap_single(&alx->hw.pdev->dev,
212 dma_unmap_addr(rxb, dma),
213 dma_unmap_len(rxb, size),
215 dma_unmap_len_set(rxb, size, 0);
219 if (rrd->word3 & cpu_to_le32(1 << RRD_ERR_RES_SHIFT) ||
220 rrd->word3 & cpu_to_le32(1 << RRD_ERR_LEN_SHIFT)) {
222 dev_kfree_skb_any(skb);
226 length = ALX_GET_FIELD(le32_to_cpu(rrd->word3),
227 RRD_PKTLEN) - ETH_FCS_LEN;
228 skb_put(skb, length);
229 skb->protocol = eth_type_trans(skb, alx->dev);
231 skb_checksum_none_assert(skb);
232 if (alx->dev->features & NETIF_F_RXCSUM &&
233 !(rrd->word3 & (cpu_to_le32(1 << RRD_ERR_L4_SHIFT) |
234 cpu_to_le32(1 << RRD_ERR_IPV4_SHIFT)))) {
235 switch (ALX_GET_FIELD(le32_to_cpu(rrd->word2),
237 case RRD_PID_IPV6UDP:
238 case RRD_PID_IPV4UDP:
239 case RRD_PID_IPV4TCP:
240 case RRD_PID_IPV6TCP:
241 skb->ip_summed = CHECKSUM_UNNECESSARY;
246 napi_gro_receive(&alx->napi, skb);
250 if (++rxq->read_idx == alx->rx_ringsz)
252 if (++rxq->rrd_read_idx == alx->rx_ringsz)
253 rxq->rrd_read_idx = 0;
255 if (++rfd_cleaned > ALX_RX_ALLOC_THRESH)
256 rfd_cleaned -= alx_refill_rx_ring(alx, GFP_ATOMIC);
260 alx_refill_rx_ring(alx, GFP_ATOMIC);
265 static int alx_poll(struct napi_struct *napi, int budget)
267 struct alx_priv *alx = container_of(napi, struct alx_priv, napi);
268 struct alx_hw *hw = &alx->hw;
273 tx_complete = alx_clean_tx_irq(alx);
274 work = alx_clean_rx_irq(alx, budget);
276 if (!tx_complete || work == budget)
279 napi_complete(&alx->napi);
281 /* enable interrupt */
282 spin_lock_irqsave(&alx->irq_lock, flags);
283 alx->int_mask |= ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0;
284 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
285 spin_unlock_irqrestore(&alx->irq_lock, flags);
292 static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr)
294 struct alx_hw *hw = &alx->hw;
295 bool write_int_mask = false;
297 spin_lock(&alx->irq_lock);
300 alx_write_mem32(hw, ALX_ISR, intr | ALX_ISR_DIS);
301 intr &= alx->int_mask;
303 if (intr & ALX_ISR_FATAL) {
304 netif_warn(alx, hw, alx->dev,
305 "fatal interrupt 0x%x, resetting\n", intr);
306 alx_schedule_reset(alx);
310 if (intr & ALX_ISR_ALERT)
311 netdev_warn(alx->dev, "alert interrupt: 0x%x\n", intr);
313 if (intr & ALX_ISR_PHY) {
314 /* suppress PHY interrupt, because the source
315 * is from PHY internal. only the internal status
316 * is cleared, the interrupt status could be cleared.
318 alx->int_mask &= ~ALX_ISR_PHY;
319 write_int_mask = true;
320 alx_schedule_link_check(alx);
323 if (intr & (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)) {
324 napi_schedule(&alx->napi);
325 /* mask rx/tx interrupt, enable them when napi complete */
326 alx->int_mask &= ~ALX_ISR_ALL_QUEUES;
327 write_int_mask = true;
331 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
333 alx_write_mem32(hw, ALX_ISR, 0);
336 spin_unlock(&alx->irq_lock);
340 static irqreturn_t alx_intr_msi(int irq, void *data)
342 struct alx_priv *alx = data;
344 return alx_intr_handle(alx, alx_read_mem32(&alx->hw, ALX_ISR));
347 static irqreturn_t alx_intr_legacy(int irq, void *data)
349 struct alx_priv *alx = data;
350 struct alx_hw *hw = &alx->hw;
353 intr = alx_read_mem32(hw, ALX_ISR);
355 if (intr & ALX_ISR_DIS || !(intr & alx->int_mask))
358 return alx_intr_handle(alx, intr);
361 static void alx_init_ring_ptrs(struct alx_priv *alx)
363 struct alx_hw *hw = &alx->hw;
364 u32 addr_hi = ((u64)alx->descmem.dma) >> 32;
366 alx->rxq.read_idx = 0;
367 alx->rxq.write_idx = 0;
368 alx->rxq.rrd_read_idx = 0;
369 alx_write_mem32(hw, ALX_RX_BASE_ADDR_HI, addr_hi);
370 alx_write_mem32(hw, ALX_RRD_ADDR_LO, alx->rxq.rrd_dma);
371 alx_write_mem32(hw, ALX_RRD_RING_SZ, alx->rx_ringsz);
372 alx_write_mem32(hw, ALX_RFD_ADDR_LO, alx->rxq.rfd_dma);
373 alx_write_mem32(hw, ALX_RFD_RING_SZ, alx->rx_ringsz);
374 alx_write_mem32(hw, ALX_RFD_BUF_SZ, alx->rxbuf_size);
376 alx->txq.read_idx = 0;
377 alx->txq.write_idx = 0;
378 alx_write_mem32(hw, ALX_TX_BASE_ADDR_HI, addr_hi);
379 alx_write_mem32(hw, ALX_TPD_PRI0_ADDR_LO, alx->txq.tpd_dma);
380 alx_write_mem32(hw, ALX_TPD_RING_SZ, alx->tx_ringsz);
382 /* load these pointers into the chip */
383 alx_write_mem32(hw, ALX_SRAM9, ALX_SRAM_LOAD_PTR);
386 static void alx_free_txring_buf(struct alx_priv *alx)
388 struct alx_tx_queue *txq = &alx->txq;
394 for (i = 0; i < alx->tx_ringsz; i++)
395 alx_free_txbuf(alx, i);
397 memset(txq->bufs, 0, alx->tx_ringsz * sizeof(struct alx_buffer));
398 memset(txq->tpd, 0, alx->tx_ringsz * sizeof(struct alx_txd));
402 netdev_reset_queue(alx->dev);
405 static void alx_free_rxring_buf(struct alx_priv *alx)
407 struct alx_rx_queue *rxq = &alx->rxq;
408 struct alx_buffer *cur_buf;
414 for (i = 0; i < alx->rx_ringsz; i++) {
415 cur_buf = rxq->bufs + i;
417 dma_unmap_single(&alx->hw.pdev->dev,
418 dma_unmap_addr(cur_buf, dma),
419 dma_unmap_len(cur_buf, size),
421 dev_kfree_skb(cur_buf->skb);
423 dma_unmap_len_set(cur_buf, size, 0);
424 dma_unmap_addr_set(cur_buf, dma, 0);
430 rxq->rrd_read_idx = 0;
433 static void alx_free_buffers(struct alx_priv *alx)
435 alx_free_txring_buf(alx);
436 alx_free_rxring_buf(alx);
439 static int alx_reinit_rings(struct alx_priv *alx)
441 alx_free_buffers(alx);
443 alx_init_ring_ptrs(alx);
445 if (!alx_refill_rx_ring(alx, GFP_KERNEL))
451 static void alx_add_mc_addr(struct alx_hw *hw, const u8 *addr, u32 *mc_hash)
455 crc32 = ether_crc(ETH_ALEN, addr);
456 reg = (crc32 >> 31) & 0x1;
457 bit = (crc32 >> 26) & 0x1F;
459 mc_hash[reg] |= BIT(bit);
462 static void __alx_set_rx_mode(struct net_device *netdev)
464 struct alx_priv *alx = netdev_priv(netdev);
465 struct alx_hw *hw = &alx->hw;
466 struct netdev_hw_addr *ha;
469 if (!(netdev->flags & IFF_ALLMULTI)) {
470 netdev_for_each_mc_addr(ha, netdev)
471 alx_add_mc_addr(hw, ha->addr, mc_hash);
473 alx_write_mem32(hw, ALX_HASH_TBL0, mc_hash[0]);
474 alx_write_mem32(hw, ALX_HASH_TBL1, mc_hash[1]);
477 hw->rx_ctrl &= ~(ALX_MAC_CTRL_MULTIALL_EN | ALX_MAC_CTRL_PROMISC_EN);
478 if (netdev->flags & IFF_PROMISC)
479 hw->rx_ctrl |= ALX_MAC_CTRL_PROMISC_EN;
480 if (netdev->flags & IFF_ALLMULTI)
481 hw->rx_ctrl |= ALX_MAC_CTRL_MULTIALL_EN;
483 alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl);
486 static void alx_set_rx_mode(struct net_device *netdev)
488 __alx_set_rx_mode(netdev);
491 static int alx_set_mac_address(struct net_device *netdev, void *data)
493 struct alx_priv *alx = netdev_priv(netdev);
494 struct alx_hw *hw = &alx->hw;
495 struct sockaddr *addr = data;
497 if (!is_valid_ether_addr(addr->sa_data))
498 return -EADDRNOTAVAIL;
500 if (netdev->addr_assign_type & NET_ADDR_RANDOM)
501 netdev->addr_assign_type ^= NET_ADDR_RANDOM;
503 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
504 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
505 alx_set_macaddr(hw, hw->mac_addr);
510 static int alx_alloc_descriptors(struct alx_priv *alx)
512 alx->txq.bufs = kcalloc(alx->tx_ringsz,
513 sizeof(struct alx_buffer),
518 alx->rxq.bufs = kcalloc(alx->rx_ringsz,
519 sizeof(struct alx_buffer),
524 /* physical tx/rx ring descriptors
526 * Allocate them as a single chunk because they must not cross a
527 * 4G boundary (hardware has a single register for high 32 bits
530 alx->descmem.size = sizeof(struct alx_txd) * alx->tx_ringsz +
531 sizeof(struct alx_rrd) * alx->rx_ringsz +
532 sizeof(struct alx_rfd) * alx->rx_ringsz;
533 alx->descmem.virt = dma_zalloc_coherent(&alx->hw.pdev->dev,
537 if (!alx->descmem.virt)
540 alx->txq.tpd = alx->descmem.virt;
541 alx->txq.tpd_dma = alx->descmem.dma;
543 /* alignment requirement for next block */
544 BUILD_BUG_ON(sizeof(struct alx_txd) % 8);
547 (void *)((u8 *)alx->descmem.virt +
548 sizeof(struct alx_txd) * alx->tx_ringsz);
549 alx->rxq.rrd_dma = alx->descmem.dma +
550 sizeof(struct alx_txd) * alx->tx_ringsz;
552 /* alignment requirement for next block */
553 BUILD_BUG_ON(sizeof(struct alx_rrd) % 8);
556 (void *)((u8 *)alx->descmem.virt +
557 sizeof(struct alx_txd) * alx->tx_ringsz +
558 sizeof(struct alx_rrd) * alx->rx_ringsz);
559 alx->rxq.rfd_dma = alx->descmem.dma +
560 sizeof(struct alx_txd) * alx->tx_ringsz +
561 sizeof(struct alx_rrd) * alx->rx_ringsz;
565 kfree(alx->txq.bufs);
566 kfree(alx->rxq.bufs);
570 static int alx_alloc_rings(struct alx_priv *alx)
574 err = alx_alloc_descriptors(alx);
578 alx->int_mask &= ~ALX_ISR_ALL_QUEUES;
579 alx->int_mask |= ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0;
581 netif_napi_add(alx->dev, &alx->napi, alx_poll, 64);
583 alx_reinit_rings(alx);
587 static void alx_free_rings(struct alx_priv *alx)
589 netif_napi_del(&alx->napi);
590 alx_free_buffers(alx);
592 kfree(alx->txq.bufs);
593 kfree(alx->rxq.bufs);
595 dma_free_coherent(&alx->hw.pdev->dev,
601 static void alx_config_vector_mapping(struct alx_priv *alx)
603 struct alx_hw *hw = &alx->hw;
605 alx_write_mem32(hw, ALX_MSI_MAP_TBL1, 0);
606 alx_write_mem32(hw, ALX_MSI_MAP_TBL2, 0);
607 alx_write_mem32(hw, ALX_MSI_ID_MAP, 0);
610 static void alx_irq_enable(struct alx_priv *alx)
612 struct alx_hw *hw = &alx->hw;
614 /* level-1 interrupt switch */
615 alx_write_mem32(hw, ALX_ISR, 0);
616 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
620 static void alx_irq_disable(struct alx_priv *alx)
622 struct alx_hw *hw = &alx->hw;
624 alx_write_mem32(hw, ALX_ISR, ALX_ISR_DIS);
625 alx_write_mem32(hw, ALX_IMR, 0);
628 synchronize_irq(alx->hw.pdev->irq);
631 static int alx_request_irq(struct alx_priv *alx)
633 struct pci_dev *pdev = alx->hw.pdev;
634 struct alx_hw *hw = &alx->hw;
638 msi_ctrl = (hw->imt >> 1) << ALX_MSI_RETRANS_TM_SHIFT;
640 if (!pci_enable_msi(alx->hw.pdev)) {
643 alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER,
644 msi_ctrl | ALX_MSI_MASK_SEL_LINE);
645 err = request_irq(pdev->irq, alx_intr_msi, 0,
646 alx->dev->name, alx);
649 /* fall back to legacy interrupt */
650 pci_disable_msi(alx->hw.pdev);
653 alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, 0);
654 err = request_irq(pdev->irq, alx_intr_legacy, IRQF_SHARED,
655 alx->dev->name, alx);
658 alx_config_vector_mapping(alx);
662 static void alx_free_irq(struct alx_priv *alx)
664 struct pci_dev *pdev = alx->hw.pdev;
666 free_irq(pdev->irq, alx);
669 pci_disable_msi(alx->hw.pdev);
674 static int alx_identify_hw(struct alx_priv *alx)
676 struct alx_hw *hw = &alx->hw;
677 int rev = alx_hw_revision(hw);
679 if (rev > ALX_REV_C0)
682 hw->max_dma_chnl = rev >= ALX_REV_B0 ? 4 : 2;
687 static int alx_init_sw(struct alx_priv *alx)
689 struct pci_dev *pdev = alx->hw.pdev;
690 struct alx_hw *hw = &alx->hw;
693 err = alx_identify_hw(alx);
695 dev_err(&pdev->dev, "unrecognized chip, aborting\n");
700 pdev->device == ALX_DEV_ID_AR8161 &&
701 pdev->subsystem_vendor == PCI_VENDOR_ID_ATTANSIC &&
702 pdev->subsystem_device == 0x0091 &&
706 hw->mtu = alx->dev->mtu;
707 alx->rxbuf_size = ALIGN(ALX_RAW_MTU(hw->mtu), 8);
708 alx->tx_ringsz = 256;
709 alx->rx_ringsz = 512;
711 alx->int_mask = ALX_ISR_MISC;
712 hw->dma_chnl = hw->max_dma_chnl;
713 hw->ith_tpd = alx->tx_ringsz / 3;
714 hw->link_speed = SPEED_UNKNOWN;
715 hw->duplex = DUPLEX_UNKNOWN;
716 hw->adv_cfg = ADVERTISED_Autoneg |
717 ADVERTISED_10baseT_Half |
718 ADVERTISED_10baseT_Full |
719 ADVERTISED_100baseT_Full |
720 ADVERTISED_100baseT_Half |
721 ADVERTISED_1000baseT_Full;
722 hw->flowctrl = ALX_FC_ANEG | ALX_FC_RX | ALX_FC_TX;
724 hw->rx_ctrl = ALX_MAC_CTRL_WOLSPED_SWEN |
725 ALX_MAC_CTRL_MHASH_ALG_HI5B |
726 ALX_MAC_CTRL_BRD_EN |
729 ALX_MAC_CTRL_RXFC_EN |
730 ALX_MAC_CTRL_TXFC_EN |
731 7 << ALX_MAC_CTRL_PRMBLEN_SHIFT;
737 static netdev_features_t alx_fix_features(struct net_device *netdev,
738 netdev_features_t features)
740 if (netdev->mtu > ALX_MAX_TSO_PKT_SIZE)
741 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
746 static void alx_netif_stop(struct alx_priv *alx)
748 alx->dev->trans_start = jiffies;
749 if (netif_carrier_ok(alx->dev)) {
750 netif_carrier_off(alx->dev);
751 netif_tx_disable(alx->dev);
752 napi_disable(&alx->napi);
756 static void alx_halt(struct alx_priv *alx)
758 struct alx_hw *hw = &alx->hw;
761 hw->link_speed = SPEED_UNKNOWN;
762 hw->duplex = DUPLEX_UNKNOWN;
767 alx_enable_aspm(hw, false, false);
768 alx_irq_disable(alx);
769 alx_free_buffers(alx);
772 static void alx_configure(struct alx_priv *alx)
774 struct alx_hw *hw = &alx->hw;
776 alx_configure_basic(hw);
778 __alx_set_rx_mode(alx->dev);
780 alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl);
783 static void alx_activate(struct alx_priv *alx)
785 /* hardware setting lost, restore it */
786 alx_reinit_rings(alx);
789 /* clear old interrupts */
790 alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS);
794 alx_schedule_link_check(alx);
797 static void alx_reinit(struct alx_priv *alx)
805 static int alx_change_mtu(struct net_device *netdev, int mtu)
807 struct alx_priv *alx = netdev_priv(netdev);
808 int max_frame = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
810 if ((max_frame < ALX_MIN_FRAME_SIZE) ||
811 (max_frame > ALX_MAX_FRAME_SIZE))
814 if (netdev->mtu == mtu)
819 alx->rxbuf_size = mtu > ALX_DEF_RXBUF_SIZE ?
820 ALIGN(max_frame, 8) : ALX_DEF_RXBUF_SIZE;
821 netdev_update_features(netdev);
822 if (netif_running(netdev))
827 static void alx_netif_start(struct alx_priv *alx)
829 netif_tx_wake_all_queues(alx->dev);
830 napi_enable(&alx->napi);
831 netif_carrier_on(alx->dev);
834 static int __alx_open(struct alx_priv *alx, bool resume)
839 netif_carrier_off(alx->dev);
841 err = alx_alloc_rings(alx);
847 err = alx_request_irq(alx);
851 /* clear old interrupts */
852 alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS);
857 netif_tx_start_all_queues(alx->dev);
859 alx_schedule_link_check(alx);
867 static void __alx_stop(struct alx_priv *alx)
874 static const char *alx_speed_desc(struct alx_hw *hw)
876 switch (alx_speed_to_ethadv(hw->link_speed, hw->duplex)) {
877 case ADVERTISED_1000baseT_Full:
878 return "1 Gbps Full";
879 case ADVERTISED_100baseT_Full:
880 return "100 Mbps Full";
881 case ADVERTISED_100baseT_Half:
882 return "100 Mbps Half";
883 case ADVERTISED_10baseT_Full:
884 return "10 Mbps Full";
885 case ADVERTISED_10baseT_Half:
886 return "10 Mbps Half";
888 return "Unknown speed";
892 static void alx_check_link(struct alx_priv *alx)
894 struct alx_hw *hw = &alx->hw;
900 /* clear PHY internal interrupt status, otherwise the main
901 * interrupt status will be asserted forever
903 alx_clear_phy_intr(hw);
905 old_speed = hw->link_speed;
906 old_duplex = hw->duplex;
907 err = alx_read_phy_link(hw);
911 spin_lock_irqsave(&alx->irq_lock, flags);
912 alx->int_mask |= ALX_ISR_PHY;
913 alx_write_mem32(hw, ALX_IMR, alx->int_mask);
914 spin_unlock_irqrestore(&alx->irq_lock, flags);
916 if (old_speed == hw->link_speed)
919 if (hw->link_speed != SPEED_UNKNOWN) {
920 netif_info(alx, link, alx->dev,
921 "NIC Up: %s\n", alx_speed_desc(hw));
922 alx_post_phy_link(hw);
923 alx_enable_aspm(hw, true, true);
926 if (old_speed == SPEED_UNKNOWN)
927 alx_netif_start(alx);
929 /* link is now down */
931 netif_info(alx, link, alx->dev, "Link Down\n");
932 err = alx_reset_mac(hw);
935 alx_irq_disable(alx);
937 /* MAC reset causes all HW settings to be lost, restore all */
938 err = alx_reinit_rings(alx);
942 alx_enable_aspm(hw, false, true);
943 alx_post_phy_link(hw);
950 alx_schedule_reset(alx);
953 static int alx_open(struct net_device *netdev)
955 return __alx_open(netdev_priv(netdev), false);
958 static int alx_stop(struct net_device *netdev)
960 __alx_stop(netdev_priv(netdev));
964 static void alx_link_check(struct work_struct *work)
966 struct alx_priv *alx;
968 alx = container_of(work, struct alx_priv, link_check_wk);
975 static void alx_reset(struct work_struct *work)
977 struct alx_priv *alx = container_of(work, struct alx_priv, reset_wk);
984 static int alx_tx_csum(struct sk_buff *skb, struct alx_txd *first)
988 if (skb->ip_summed != CHECKSUM_PARTIAL)
991 cso = skb_checksum_start_offset(skb);
995 css = cso + skb->csum_offset;
996 first->word1 |= cpu_to_le32((cso >> 1) << TPD_CXSUMSTART_SHIFT);
997 first->word1 |= cpu_to_le32((css >> 1) << TPD_CXSUMOFFSET_SHIFT);
998 first->word1 |= cpu_to_le32(1 << TPD_CXSUM_EN_SHIFT);
1003 static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb)
1005 struct alx_tx_queue *txq = &alx->txq;
1006 struct alx_txd *tpd, *first_tpd;
1008 int maplen, f, first_idx = txq->write_idx;
1010 first_tpd = &txq->tpd[txq->write_idx];
1013 maplen = skb_headlen(skb);
1014 dma = dma_map_single(&alx->hw.pdev->dev, skb->data, maplen,
1016 if (dma_mapping_error(&alx->hw.pdev->dev, dma))
1019 dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen);
1020 dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma);
1022 tpd->adrl.addr = cpu_to_le64(dma);
1023 tpd->len = cpu_to_le16(maplen);
1025 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
1026 struct skb_frag_struct *frag;
1028 frag = &skb_shinfo(skb)->frags[f];
1030 if (++txq->write_idx == alx->tx_ringsz)
1032 tpd = &txq->tpd[txq->write_idx];
1034 tpd->word1 = first_tpd->word1;
1036 maplen = skb_frag_size(frag);
1037 dma = skb_frag_dma_map(&alx->hw.pdev->dev, frag, 0,
1038 maplen, DMA_TO_DEVICE);
1039 if (dma_mapping_error(&alx->hw.pdev->dev, dma))
1041 dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen);
1042 dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma);
1044 tpd->adrl.addr = cpu_to_le64(dma);
1045 tpd->len = cpu_to_le16(maplen);
1048 /* last TPD, set EOP flag and store skb */
1049 tpd->word1 |= cpu_to_le32(1 << TPD_EOP_SHIFT);
1050 txq->bufs[txq->write_idx].skb = skb;
1052 if (++txq->write_idx == alx->tx_ringsz)
1059 while (f != txq->write_idx) {
1060 alx_free_txbuf(alx, f);
1061 if (++f == alx->tx_ringsz)
1067 static netdev_tx_t alx_start_xmit(struct sk_buff *skb,
1068 struct net_device *netdev)
1070 struct alx_priv *alx = netdev_priv(netdev);
1071 struct alx_tx_queue *txq = &alx->txq;
1072 struct alx_txd *first;
1073 int tpdreq = skb_shinfo(skb)->nr_frags + 1;
1075 if (alx_tpd_avail(alx) < tpdreq) {
1076 netif_stop_queue(alx->dev);
1080 first = &txq->tpd[txq->write_idx];
1081 memset(first, 0, sizeof(*first));
1083 if (alx_tx_csum(skb, first))
1086 if (alx_map_tx_skb(alx, skb) < 0)
1089 netdev_sent_queue(alx->dev, skb->len);
1091 /* flush updates before updating hardware */
1093 alx_write_mem16(&alx->hw, ALX_TPD_PRI0_PIDX, txq->write_idx);
1095 if (alx_tpd_avail(alx) < alx->tx_ringsz/8)
1096 netif_stop_queue(alx->dev);
1098 return NETDEV_TX_OK;
1101 dev_kfree_skb_any(skb);
1102 return NETDEV_TX_OK;
1105 static void alx_tx_timeout(struct net_device *dev)
1107 struct alx_priv *alx = netdev_priv(dev);
1109 alx_schedule_reset(alx);
1112 static int alx_mdio_read(struct net_device *netdev,
1113 int prtad, int devad, u16 addr)
1115 struct alx_priv *alx = netdev_priv(netdev);
1116 struct alx_hw *hw = &alx->hw;
1120 if (prtad != hw->mdio.prtad)
1123 if (devad == MDIO_DEVAD_NONE)
1124 err = alx_read_phy_reg(hw, addr, &val);
1126 err = alx_read_phy_ext(hw, devad, addr, &val);
1133 static int alx_mdio_write(struct net_device *netdev,
1134 int prtad, int devad, u16 addr, u16 val)
1136 struct alx_priv *alx = netdev_priv(netdev);
1137 struct alx_hw *hw = &alx->hw;
1139 if (prtad != hw->mdio.prtad)
1142 if (devad == MDIO_DEVAD_NONE)
1143 return alx_write_phy_reg(hw, addr, val);
1145 return alx_write_phy_ext(hw, devad, addr, val);
1148 static int alx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1150 struct alx_priv *alx = netdev_priv(netdev);
1152 if (!netif_running(netdev))
1155 return mdio_mii_ioctl(&alx->hw.mdio, if_mii(ifr), cmd);
1158 #ifdef CONFIG_NET_POLL_CONTROLLER
1159 static void alx_poll_controller(struct net_device *netdev)
1161 struct alx_priv *alx = netdev_priv(netdev);
1164 alx_intr_msi(0, alx);
1166 alx_intr_legacy(0, alx);
1170 static struct rtnl_link_stats64 *alx_get_stats64(struct net_device *dev,
1171 struct rtnl_link_stats64 *net_stats)
1173 struct alx_priv *alx = netdev_priv(dev);
1174 struct alx_hw_stats *hw_stats = &alx->hw.stats;
1176 spin_lock(&alx->stats_lock);
1178 alx_update_hw_stats(&alx->hw);
1180 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1181 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1182 net_stats->multicast = hw_stats->rx_mcast;
1183 net_stats->collisions = hw_stats->tx_single_col +
1184 hw_stats->tx_multi_col +
1185 hw_stats->tx_late_col +
1186 hw_stats->tx_abort_col;
1188 net_stats->rx_errors = hw_stats->rx_frag +
1189 hw_stats->rx_fcs_err +
1190 hw_stats->rx_len_err +
1191 hw_stats->rx_ov_sz +
1192 hw_stats->rx_ov_rrd +
1193 hw_stats->rx_align_err +
1194 hw_stats->rx_ov_rxf;
1196 net_stats->rx_fifo_errors = hw_stats->rx_ov_rxf;
1197 net_stats->rx_length_errors = hw_stats->rx_len_err;
1198 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1199 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1200 net_stats->rx_dropped = hw_stats->rx_ov_rrd;
1202 net_stats->tx_errors = hw_stats->tx_late_col +
1203 hw_stats->tx_abort_col +
1204 hw_stats->tx_underrun +
1207 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1208 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1209 net_stats->tx_window_errors = hw_stats->tx_late_col;
1211 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1212 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1214 spin_unlock(&alx->stats_lock);
1219 static const struct net_device_ops alx_netdev_ops = {
1220 .ndo_open = alx_open,
1221 .ndo_stop = alx_stop,
1222 .ndo_start_xmit = alx_start_xmit,
1223 .ndo_get_stats64 = alx_get_stats64,
1224 .ndo_set_rx_mode = alx_set_rx_mode,
1225 .ndo_validate_addr = eth_validate_addr,
1226 .ndo_set_mac_address = alx_set_mac_address,
1227 .ndo_change_mtu = alx_change_mtu,
1228 .ndo_do_ioctl = alx_ioctl,
1229 .ndo_tx_timeout = alx_tx_timeout,
1230 .ndo_fix_features = alx_fix_features,
1231 #ifdef CONFIG_NET_POLL_CONTROLLER
1232 .ndo_poll_controller = alx_poll_controller,
1236 static int alx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1238 struct net_device *netdev;
1239 struct alx_priv *alx;
1241 bool phy_configured;
1244 err = pci_enable_device_mem(pdev);
1248 /* The alx chip can DMA to 64-bit addresses, but it uses a single
1249 * shared register for the high 32 bits, so only a single, aligned,
1250 * 4 GB physical address range can be used for descriptors.
1252 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1253 dev_dbg(&pdev->dev, "DMA to 64-BIT addresses\n");
1255 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1257 dev_err(&pdev->dev, "No usable DMA config, aborting\n");
1258 goto out_pci_disable;
1262 bars = pci_select_bars(pdev, IORESOURCE_MEM);
1263 err = pci_request_selected_regions(pdev, bars, alx_drv_name);
1266 "pci_request_selected_regions failed(bars:%d)\n", bars);
1267 goto out_pci_disable;
1270 pci_enable_pcie_error_reporting(pdev);
1271 pci_set_master(pdev);
1273 if (!pdev->pm_cap) {
1275 "Can't find power management capability, aborting\n");
1277 goto out_pci_release;
1280 netdev = alloc_etherdev(sizeof(*alx));
1283 goto out_pci_release;
1286 SET_NETDEV_DEV(netdev, &pdev->dev);
1287 alx = netdev_priv(netdev);
1288 spin_lock_init(&alx->hw.mdio_lock);
1289 spin_lock_init(&alx->irq_lock);
1290 spin_lock_init(&alx->stats_lock);
1292 alx->hw.pdev = pdev;
1293 alx->msg_enable = NETIF_MSG_LINK | NETIF_MSG_HW | NETIF_MSG_IFUP |
1294 NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR | NETIF_MSG_WOL;
1296 pci_set_drvdata(pdev, alx);
1298 hw->hw_addr = pci_ioremap_bar(pdev, 0);
1300 dev_err(&pdev->dev, "cannot map device registers\n");
1302 goto out_free_netdev;
1305 netdev->netdev_ops = &alx_netdev_ops;
1306 netdev->ethtool_ops = &alx_ethtool_ops;
1307 netdev->irq = pdev->irq;
1308 netdev->watchdog_timeo = ALX_WATCHDOG_TIME;
1310 if (ent->driver_data & ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG)
1311 pdev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
1313 err = alx_init_sw(alx);
1315 dev_err(&pdev->dev, "net device private data init failed\n");
1321 phy_configured = alx_phy_configured(hw);
1323 if (!phy_configured)
1326 err = alx_reset_mac(hw);
1328 dev_err(&pdev->dev, "MAC Reset failed, error = %d\n", err);
1332 /* setup link to put it in a known good starting state */
1333 if (!phy_configured) {
1334 err = alx_setup_speed_duplex(hw, hw->adv_cfg, hw->flowctrl);
1337 "failed to configure PHY speed/duplex (err=%d)\n",
1343 netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
1345 if (alx_get_perm_macaddr(hw, hw->perm_addr)) {
1346 dev_warn(&pdev->dev,
1347 "Invalid permanent address programmed, using random one\n");
1348 eth_hw_addr_random(netdev);
1349 memcpy(hw->perm_addr, netdev->dev_addr, netdev->addr_len);
1352 memcpy(hw->mac_addr, hw->perm_addr, ETH_ALEN);
1353 memcpy(netdev->dev_addr, hw->mac_addr, ETH_ALEN);
1354 memcpy(netdev->perm_addr, hw->perm_addr, ETH_ALEN);
1358 hw->mdio.dev = netdev;
1359 hw->mdio.mode_support = MDIO_SUPPORTS_C45 |
1362 hw->mdio.mdio_read = alx_mdio_read;
1363 hw->mdio.mdio_write = alx_mdio_write;
1365 if (!alx_get_phy_info(hw)) {
1366 dev_err(&pdev->dev, "failed to identify PHY\n");
1371 INIT_WORK(&alx->link_check_wk, alx_link_check);
1372 INIT_WORK(&alx->reset_wk, alx_reset);
1373 netif_carrier_off(netdev);
1375 err = register_netdev(netdev);
1377 dev_err(&pdev->dev, "register netdevice failed\n");
1382 "Qualcomm Atheros AR816x/AR817x Ethernet [%pM]\n",
1388 iounmap(hw->hw_addr);
1390 free_netdev(netdev);
1392 pci_release_selected_regions(pdev, bars);
1394 pci_disable_device(pdev);
1398 static void alx_remove(struct pci_dev *pdev)
1400 struct alx_priv *alx = pci_get_drvdata(pdev);
1401 struct alx_hw *hw = &alx->hw;
1403 cancel_work_sync(&alx->link_check_wk);
1404 cancel_work_sync(&alx->reset_wk);
1406 /* restore permanent mac address */
1407 alx_set_macaddr(hw, hw->perm_addr);
1409 unregister_netdev(alx->dev);
1410 iounmap(hw->hw_addr);
1411 pci_release_selected_regions(pdev,
1412 pci_select_bars(pdev, IORESOURCE_MEM));
1414 pci_disable_pcie_error_reporting(pdev);
1415 pci_disable_device(pdev);
1417 free_netdev(alx->dev);
1420 #ifdef CONFIG_PM_SLEEP
1421 static int alx_suspend(struct device *dev)
1423 struct pci_dev *pdev = to_pci_dev(dev);
1424 struct alx_priv *alx = pci_get_drvdata(pdev);
1426 if (!netif_running(alx->dev))
1428 netif_device_detach(alx->dev);
1433 static int alx_resume(struct device *dev)
1435 struct pci_dev *pdev = to_pci_dev(dev);
1436 struct alx_priv *alx = pci_get_drvdata(pdev);
1437 struct alx_hw *hw = &alx->hw;
1441 if (!netif_running(alx->dev))
1443 netif_device_attach(alx->dev);
1444 return __alx_open(alx, true);
1447 static SIMPLE_DEV_PM_OPS(alx_pm_ops, alx_suspend, alx_resume);
1448 #define ALX_PM_OPS (&alx_pm_ops)
1450 #define ALX_PM_OPS NULL
1454 static pci_ers_result_t alx_pci_error_detected(struct pci_dev *pdev,
1455 pci_channel_state_t state)
1457 struct alx_priv *alx = pci_get_drvdata(pdev);
1458 struct net_device *netdev = alx->dev;
1459 pci_ers_result_t rc = PCI_ERS_RESULT_NEED_RESET;
1461 dev_info(&pdev->dev, "pci error detected\n");
1465 if (netif_running(netdev)) {
1466 netif_device_detach(netdev);
1470 if (state == pci_channel_io_perm_failure)
1471 rc = PCI_ERS_RESULT_DISCONNECT;
1473 pci_disable_device(pdev);
1480 static pci_ers_result_t alx_pci_error_slot_reset(struct pci_dev *pdev)
1482 struct alx_priv *alx = pci_get_drvdata(pdev);
1483 struct alx_hw *hw = &alx->hw;
1484 pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT;
1486 dev_info(&pdev->dev, "pci error slot reset\n");
1490 if (pci_enable_device(pdev)) {
1491 dev_err(&pdev->dev, "Failed to re-enable PCI device after reset\n");
1495 pci_set_master(pdev);
1498 if (!alx_reset_mac(hw))
1499 rc = PCI_ERS_RESULT_RECOVERED;
1501 pci_cleanup_aer_uncorrect_error_status(pdev);
1508 static void alx_pci_error_resume(struct pci_dev *pdev)
1510 struct alx_priv *alx = pci_get_drvdata(pdev);
1511 struct net_device *netdev = alx->dev;
1513 dev_info(&pdev->dev, "pci error resume\n");
1517 if (netif_running(netdev)) {
1519 netif_device_attach(netdev);
1525 static const struct pci_error_handlers alx_err_handlers = {
1526 .error_detected = alx_pci_error_detected,
1527 .slot_reset = alx_pci_error_slot_reset,
1528 .resume = alx_pci_error_resume,
1531 static const struct pci_device_id alx_pci_tbl[] = {
1532 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8161),
1533 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
1534 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2200),
1535 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
1536 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2400),
1537 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
1538 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8162),
1539 .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG },
1540 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8171) },
1541 { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8172) },
1545 static struct pci_driver alx_driver = {
1546 .name = alx_drv_name,
1547 .id_table = alx_pci_tbl,
1549 .remove = alx_remove,
1550 .err_handler = &alx_err_handlers,
1551 .driver.pm = ALX_PM_OPS,
1554 module_pci_driver(alx_driver);
1555 MODULE_DEVICE_TABLE(pci, alx_pci_tbl);
1556 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
1557 MODULE_AUTHOR("Qualcomm Corporation, <nic-devel@qualcomm.com>");
1559 "Qualcomm Atheros(R) AR816x/AR817x PCI-E Ethernet Network Driver");
1560 MODULE_LICENSE("GPL");