diff options
Diffstat (limited to 'drivers/net/ethernet/atheros/alx/main.c')
| -rw-r--r-- | drivers/net/ethernet/atheros/alx/main.c | 1625 |
1 files changed, 1625 insertions, 0 deletions
diff --git a/drivers/net/ethernet/atheros/alx/main.c b/drivers/net/ethernet/atheros/alx/main.c new file mode 100644 index 00000000000..418de8b1316 --- /dev/null +++ b/drivers/net/ethernet/atheros/alx/main.c @@ -0,0 +1,1625 @@ +/* + * Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net> + * + * This file is free software: you may copy, redistribute and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation, either version 2 of the License, or (at your + * option) any later version. + * + * This file is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * This file incorporates work covered by the following copyright and + * permission notice: + * + * Copyright (c) 2012 Qualcomm Atheros, Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/if_vlan.h> +#include <linux/mdio.h> +#include <linux/aer.h> +#include <linux/bitops.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <net/ip6_checksum.h> +#include <linux/crc32.h> +#include "alx.h" +#include "hw.h" +#include "reg.h" + +const char alx_drv_name[] = "alx"; + + +static void alx_free_txbuf(struct alx_priv *alx, int entry) +{ + struct alx_buffer *txb = &alx->txq.bufs[entry]; + + if (dma_unmap_len(txb, size)) { + dma_unmap_single(&alx->hw.pdev->dev, + dma_unmap_addr(txb, dma), + dma_unmap_len(txb, size), + DMA_TO_DEVICE); + dma_unmap_len_set(txb, size, 0); + } + + if (txb->skb) { + dev_kfree_skb_any(txb->skb); + txb->skb = NULL; + } +} + +static int alx_refill_rx_ring(struct alx_priv *alx, gfp_t gfp) +{ + struct alx_rx_queue *rxq = &alx->rxq; + struct sk_buff *skb; + struct alx_buffer *cur_buf; + dma_addr_t dma; + u16 cur, next, count = 0; + + next = cur = rxq->write_idx; + if (++next == alx->rx_ringsz) + next = 0; + cur_buf = &rxq->bufs[cur]; + + while (!cur_buf->skb && next != rxq->read_idx) { + struct alx_rfd *rfd = &rxq->rfd[cur]; + + skb = __netdev_alloc_skb(alx->dev, alx->rxbuf_size, gfp); + if (!skb) + break; + dma = dma_map_single(&alx->hw.pdev->dev, + skb->data, alx->rxbuf_size, + DMA_FROM_DEVICE); + if (dma_mapping_error(&alx->hw.pdev->dev, dma)) { + dev_kfree_skb(skb); + break; + } + + /* Unfortunately, RX descriptor buffers must be 4-byte + * aligned, so we can't use IP alignment. + */ + if (WARN_ON(dma & 3)) { + dev_kfree_skb(skb); + break; + } + + cur_buf->skb = skb; + dma_unmap_len_set(cur_buf, size, alx->rxbuf_size); + dma_unmap_addr_set(cur_buf, dma, dma); + rfd->addr = cpu_to_le64(dma); + + cur = next; + if (++next == alx->rx_ringsz) + next = 0; + cur_buf = &rxq->bufs[cur]; + count++; + } + + if (count) { + /* flush all updates before updating hardware */ + wmb(); + rxq->write_idx = cur; + alx_write_mem16(&alx->hw, ALX_RFD_PIDX, cur); + } + + return count; +} + +static inline int alx_tpd_avail(struct alx_priv *alx) +{ + struct alx_tx_queue *txq = &alx->txq; + + if (txq->write_idx >= txq->read_idx) + return alx->tx_ringsz + txq->read_idx - txq->write_idx - 1; + return txq->read_idx - txq->write_idx - 1; +} + +static bool alx_clean_tx_irq(struct alx_priv *alx) +{ + struct alx_tx_queue *txq = &alx->txq; + u16 hw_read_idx, sw_read_idx; + unsigned int total_bytes = 0, total_packets = 0; + int budget = ALX_DEFAULT_TX_WORK; + + sw_read_idx = txq->read_idx; + hw_read_idx = alx_read_mem16(&alx->hw, ALX_TPD_PRI0_CIDX); + + if (sw_read_idx != hw_read_idx) { + while (sw_read_idx != hw_read_idx && budget > 0) { + struct sk_buff *skb; + + skb = txq->bufs[sw_read_idx].skb; + if (skb) { + total_bytes += skb->len; + total_packets++; + budget--; + } + + alx_free_txbuf(alx, sw_read_idx); + + if (++sw_read_idx == alx->tx_ringsz) + sw_read_idx = 0; + } + txq->read_idx = sw_read_idx; + + netdev_completed_queue(alx->dev, total_packets, total_bytes); + } + + if (netif_queue_stopped(alx->dev) && netif_carrier_ok(alx->dev) && + alx_tpd_avail(alx) > alx->tx_ringsz/4) + netif_wake_queue(alx->dev); + + return sw_read_idx == hw_read_idx; +} + +static void alx_schedule_link_check(struct alx_priv *alx) +{ + schedule_work(&alx->link_check_wk); +} + +static void alx_schedule_reset(struct alx_priv *alx) +{ + schedule_work(&alx->reset_wk); +} + +static bool alx_clean_rx_irq(struct alx_priv *alx, int budget) +{ + struct alx_rx_queue *rxq = &alx->rxq; + struct alx_rrd *rrd; + struct alx_buffer *rxb; + struct sk_buff *skb; + u16 length, rfd_cleaned = 0; + + while (budget > 0) { + rrd = &rxq->rrd[rxq->rrd_read_idx]; + if (!(rrd->word3 & cpu_to_le32(1 << RRD_UPDATED_SHIFT))) + break; + rrd->word3 &= ~cpu_to_le32(1 << RRD_UPDATED_SHIFT); + + if (ALX_GET_FIELD(le32_to_cpu(rrd->word0), + RRD_SI) != rxq->read_idx || + ALX_GET_FIELD(le32_to_cpu(rrd->word0), + RRD_NOR) != 1) { + alx_schedule_reset(alx); + return 0; + } + + rxb = &rxq->bufs[rxq->read_idx]; + dma_unmap_single(&alx->hw.pdev->dev, + dma_unmap_addr(rxb, dma), + dma_unmap_len(rxb, size), + DMA_FROM_DEVICE); + dma_unmap_len_set(rxb, size, 0); + skb = rxb->skb; + rxb->skb = NULL; + + if (rrd->word3 & cpu_to_le32(1 << RRD_ERR_RES_SHIFT) || + rrd->word3 & cpu_to_le32(1 << RRD_ERR_LEN_SHIFT)) { + rrd->word3 = 0; + dev_kfree_skb_any(skb); + goto next_pkt; + } + + length = ALX_GET_FIELD(le32_to_cpu(rrd->word3), + RRD_PKTLEN) - ETH_FCS_LEN; + skb_put(skb, length); + skb->protocol = eth_type_trans(skb, alx->dev); + + skb_checksum_none_assert(skb); + if (alx->dev->features & NETIF_F_RXCSUM && + !(rrd->word3 & (cpu_to_le32(1 << RRD_ERR_L4_SHIFT) | + cpu_to_le32(1 << RRD_ERR_IPV4_SHIFT)))) { + switch (ALX_GET_FIELD(le32_to_cpu(rrd->word2), + RRD_PID)) { + case RRD_PID_IPV6UDP: + case RRD_PID_IPV4UDP: + case RRD_PID_IPV4TCP: + case RRD_PID_IPV6TCP: + skb->ip_summed = CHECKSUM_UNNECESSARY; + break; + } + } + + napi_gro_receive(&alx->napi, skb); + budget--; + +next_pkt: + if (++rxq->read_idx == alx->rx_ringsz) + rxq->read_idx = 0; + if (++rxq->rrd_read_idx == alx->rx_ringsz) + rxq->rrd_read_idx = 0; + + if (++rfd_cleaned > ALX_RX_ALLOC_THRESH) + rfd_cleaned -= alx_refill_rx_ring(alx, GFP_ATOMIC); + } + + if (rfd_cleaned) + alx_refill_rx_ring(alx, GFP_ATOMIC); + + return budget > 0; +} + +static int alx_poll(struct napi_struct *napi, int budget) +{ + struct alx_priv *alx = container_of(napi, struct alx_priv, napi); + struct alx_hw *hw = &alx->hw; + bool complete = true; + unsigned long flags; + + complete = alx_clean_tx_irq(alx) && + alx_clean_rx_irq(alx, budget); + + if (!complete) + return 1; + + napi_complete(&alx->napi); + + /* enable interrupt */ + spin_lock_irqsave(&alx->irq_lock, flags); + alx->int_mask |= ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0; + alx_write_mem32(hw, ALX_IMR, alx->int_mask); + spin_unlock_irqrestore(&alx->irq_lock, flags); + + alx_post_write(hw); + + return 0; +} + +static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr) +{ + struct alx_hw *hw = &alx->hw; + bool write_int_mask = false; + + spin_lock(&alx->irq_lock); + + /* ACK interrupt */ + alx_write_mem32(hw, ALX_ISR, intr | ALX_ISR_DIS); + intr &= alx->int_mask; + + if (intr & ALX_ISR_FATAL) { + netif_warn(alx, hw, alx->dev, + "fatal interrupt 0x%x, resetting\n", intr); + alx_schedule_reset(alx); + goto out; + } + + if (intr & ALX_ISR_ALERT) + netdev_warn(alx->dev, "alert interrupt: 0x%x\n", intr); + + if (intr & ALX_ISR_PHY) { + /* suppress PHY interrupt, because the source + * is from PHY internal. only the internal status + * is cleared, the interrupt status could be cleared. + */ + alx->int_mask &= ~ALX_ISR_PHY; + write_int_mask = true; + alx_schedule_link_check(alx); + } + + if (intr & (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)) { + napi_schedule(&alx->napi); + /* mask rx/tx interrupt, enable them when napi complete */ + alx->int_mask &= ~ALX_ISR_ALL_QUEUES; + write_int_mask = true; + } + + if (write_int_mask) + alx_write_mem32(hw, ALX_IMR, alx->int_mask); + + alx_write_mem32(hw, ALX_ISR, 0); + + out: + spin_unlock(&alx->irq_lock); + return IRQ_HANDLED; +} + +static irqreturn_t alx_intr_msi(int irq, void *data) +{ + struct alx_priv *alx = data; + + return alx_intr_handle(alx, alx_read_mem32(&alx->hw, ALX_ISR)); +} + +static irqreturn_t alx_intr_legacy(int irq, void *data) +{ + struct alx_priv *alx = data; + struct alx_hw *hw = &alx->hw; + u32 intr; + + intr = alx_read_mem32(hw, ALX_ISR); + + if (intr & ALX_ISR_DIS || !(intr & alx->int_mask)) + return IRQ_NONE; + + return alx_intr_handle(alx, intr); +} + +static void alx_init_ring_ptrs(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + u32 addr_hi = ((u64)alx->descmem.dma) >> 32; + + alx->rxq.read_idx = 0; + alx->rxq.write_idx = 0; + alx->rxq.rrd_read_idx = 0; + alx_write_mem32(hw, ALX_RX_BASE_ADDR_HI, addr_hi); + alx_write_mem32(hw, ALX_RRD_ADDR_LO, alx->rxq.rrd_dma); + alx_write_mem32(hw, ALX_RRD_RING_SZ, alx->rx_ringsz); + alx_write_mem32(hw, ALX_RFD_ADDR_LO, alx->rxq.rfd_dma); + alx_write_mem32(hw, ALX_RFD_RING_SZ, alx->rx_ringsz); + alx_write_mem32(hw, ALX_RFD_BUF_SZ, alx->rxbuf_size); + + alx->txq.read_idx = 0; + alx->txq.write_idx = 0; + alx_write_mem32(hw, ALX_TX_BASE_ADDR_HI, addr_hi); + alx_write_mem32(hw, ALX_TPD_PRI0_ADDR_LO, alx->txq.tpd_dma); + alx_write_mem32(hw, ALX_TPD_RING_SZ, alx->tx_ringsz); + + /* load these pointers into the chip */ + alx_write_mem32(hw, ALX_SRAM9, ALX_SRAM_LOAD_PTR); +} + +static void alx_free_txring_buf(struct alx_priv *alx) +{ + struct alx_tx_queue *txq = &alx->txq; + int i; + + if (!txq->bufs) + return; + + for (i = 0; i < alx->tx_ringsz; i++) + alx_free_txbuf(alx, i); + + memset(txq->bufs, 0, alx->tx_ringsz * sizeof(struct alx_buffer)); + memset(txq->tpd, 0, alx->tx_ringsz * sizeof(struct alx_txd)); + txq->write_idx = 0; + txq->read_idx = 0; + + netdev_reset_queue(alx->dev); +} + +static void alx_free_rxring_buf(struct alx_priv *alx) +{ + struct alx_rx_queue *rxq = &alx->rxq; + struct alx_buffer *cur_buf; + u16 i; + + if (rxq == NULL) + return; + + for (i = 0; i < alx->rx_ringsz; i++) { + cur_buf = rxq->bufs + i; + if (cur_buf->skb) { + dma_unmap_single(&alx->hw.pdev->dev, + dma_unmap_addr(cur_buf, dma), + dma_unmap_len(cur_buf, size), + DMA_FROM_DEVICE); + dev_kfree_skb(cur_buf->skb); + cur_buf->skb = NULL; + dma_unmap_len_set(cur_buf, size, 0); + dma_unmap_addr_set(cur_buf, dma, 0); + } + } + + rxq->write_idx = 0; + rxq->read_idx = 0; + rxq->rrd_read_idx = 0; +} + +static void alx_free_buffers(struct alx_priv *alx) +{ + alx_free_txring_buf(alx); + alx_free_rxring_buf(alx); +} + +static int alx_reinit_rings(struct alx_priv *alx) +{ + alx_free_buffers(alx); + + alx_init_ring_ptrs(alx); + + if (!alx_refill_rx_ring(alx, GFP_KERNEL)) + return -ENOMEM; + + return 0; +} + +static void alx_add_mc_addr(struct alx_hw *hw, const u8 *addr, u32 *mc_hash) +{ + u32 crc32, bit, reg; + + crc32 = ether_crc(ETH_ALEN, addr); + reg = (crc32 >> 31) & 0x1; + bit = (crc32 >> 26) & 0x1F; + + mc_hash[reg] |= BIT(bit); +} + +static void __alx_set_rx_mode(struct net_device *netdev) +{ + struct alx_priv *alx = netdev_priv(netdev); + struct alx_hw *hw = &alx->hw; + struct netdev_hw_addr *ha; + u32 mc_hash[2] = {}; + + if (!(netdev->flags & IFF_ALLMULTI)) { + netdev_for_each_mc_addr(ha, netdev) + alx_add_mc_addr(hw, ha->addr, mc_hash); + + alx_write_mem32(hw, ALX_HASH_TBL0, mc_hash[0]); + alx_write_mem32(hw, ALX_HASH_TBL1, mc_hash[1]); + } + + hw->rx_ctrl &= ~(ALX_MAC_CTRL_MULTIALL_EN | ALX_MAC_CTRL_PROMISC_EN); + if (netdev->flags & IFF_PROMISC) + hw->rx_ctrl |= ALX_MAC_CTRL_PROMISC_EN; + if (netdev->flags & IFF_ALLMULTI) + hw->rx_ctrl |= ALX_MAC_CTRL_MULTIALL_EN; + + alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl); +} + +static void alx_set_rx_mode(struct net_device *netdev) +{ + __alx_set_rx_mode(netdev); +} + +static int alx_set_mac_address(struct net_device *netdev, void *data) +{ + struct alx_priv *alx = netdev_priv(netdev); + struct alx_hw *hw = &alx->hw; + struct sockaddr *addr = data; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (netdev->addr_assign_type & NET_ADDR_RANDOM) + netdev->addr_assign_type ^= NET_ADDR_RANDOM; + + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); + alx_set_macaddr(hw, hw->mac_addr); + + return 0; +} + +static int alx_alloc_descriptors(struct alx_priv *alx) +{ + alx->txq.bufs = kcalloc(alx->tx_ringsz, + sizeof(struct alx_buffer), + GFP_KERNEL); + if (!alx->txq.bufs) + return -ENOMEM; + + alx->rxq.bufs = kcalloc(alx->rx_ringsz, + sizeof(struct alx_buffer), + GFP_KERNEL); + if (!alx->rxq.bufs) + goto out_free; + + /* physical tx/rx ring descriptors + * + * Allocate them as a single chunk because they must not cross a + * 4G boundary (hardware has a single register for high 32 bits + * of addresses only) + */ + alx->descmem.size = sizeof(struct alx_txd) * alx->tx_ringsz + + sizeof(struct alx_rrd) * alx->rx_ringsz + + sizeof(struct alx_rfd) * alx->rx_ringsz; + alx->descmem.virt = dma_zalloc_coherent(&alx->hw.pdev->dev, + alx->descmem.size, + &alx->descmem.dma, + GFP_KERNEL); + if (!alx->descmem.virt) + goto out_free; + + alx->txq.tpd = (void *)alx->descmem.virt; + alx->txq.tpd_dma = alx->descmem.dma; + + /* alignment requirement for next block */ + BUILD_BUG_ON(sizeof(struct alx_txd) % 8); + + alx->rxq.rrd = + (void *)((u8 *)alx->descmem.virt + + sizeof(struct alx_txd) * alx->tx_ringsz); + alx->rxq.rrd_dma = alx->descmem.dma + + sizeof(struct alx_txd) * alx->tx_ringsz; + + /* alignment requirement for next block */ + BUILD_BUG_ON(sizeof(struct alx_rrd) % 8); + + alx->rxq.rfd = + (void *)((u8 *)alx->descmem.virt + + sizeof(struct alx_txd) * alx->tx_ringsz + + sizeof(struct alx_rrd) * alx->rx_ringsz); + alx->rxq.rfd_dma = alx->descmem.dma + + sizeof(struct alx_txd) * alx->tx_ringsz + + sizeof(struct alx_rrd) * alx->rx_ringsz; + + return 0; +out_free: + kfree(alx->txq.bufs); + kfree(alx->rxq.bufs); + return -ENOMEM; +} + +static int alx_alloc_rings(struct alx_priv *alx) +{ + int err; + + err = alx_alloc_descriptors(alx); + if (err) + return err; + + alx->int_mask &= ~ALX_ISR_ALL_QUEUES; + alx->int_mask |= ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0; + alx->tx_ringsz = alx->tx_ringsz; + + netif_napi_add(alx->dev, &alx->napi, alx_poll, 64); + + alx_reinit_rings(alx); + return 0; +} + +static void alx_free_rings(struct alx_priv *alx) +{ + netif_napi_del(&alx->napi); + alx_free_buffers(alx); + + kfree(alx->txq.bufs); + kfree(alx->rxq.bufs); + + dma_free_coherent(&alx->hw.pdev->dev, + alx->descmem.size, + alx->descmem.virt, + alx->descmem.dma); +} + +static void alx_config_vector_mapping(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + + alx_write_mem32(hw, ALX_MSI_MAP_TBL1, 0); + alx_write_mem32(hw, ALX_MSI_MAP_TBL2, 0); + alx_write_mem32(hw, ALX_MSI_ID_MAP, 0); +} + +static void alx_irq_enable(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + + /* level-1 interrupt switch */ + alx_write_mem32(hw, ALX_ISR, 0); + alx_write_mem32(hw, ALX_IMR, alx->int_mask); + alx_post_write(hw); +} + +static void alx_irq_disable(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + + alx_write_mem32(hw, ALX_ISR, ALX_ISR_DIS); + alx_write_mem32(hw, ALX_IMR, 0); + alx_post_write(hw); + + synchronize_irq(alx->hw.pdev->irq); +} + +static int alx_request_irq(struct alx_priv *alx) +{ + struct pci_dev *pdev = alx->hw.pdev; + struct alx_hw *hw = &alx->hw; + int err; + u32 msi_ctrl; + + msi_ctrl = (hw->imt >> 1) << ALX_MSI_RETRANS_TM_SHIFT; + + if (!pci_enable_msi(alx->hw.pdev)) { + alx->msi = true; + + alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, + msi_ctrl | ALX_MSI_MASK_SEL_LINE); + err = request_irq(pdev->irq, alx_intr_msi, 0, + alx->dev->name, alx); + if (!err) + goto out; + /* fall back to legacy interrupt */ + pci_disable_msi(alx->hw.pdev); + } + + alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, 0); + err = request_irq(pdev->irq, alx_intr_legacy, IRQF_SHARED, + alx->dev->name, alx); +out: + if (!err) + alx_config_vector_mapping(alx); + return err; +} + +static void alx_free_irq(struct alx_priv *alx) +{ + struct pci_dev *pdev = alx->hw.pdev; + + free_irq(pdev->irq, alx); + + if (alx->msi) { + pci_disable_msi(alx->hw.pdev); + alx->msi = false; + } +} + +static int alx_identify_hw(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + int rev = alx_hw_revision(hw); + + if (rev > ALX_REV_C0) + return -EINVAL; + + hw->max_dma_chnl = rev >= ALX_REV_B0 ? 4 : 2; + + return 0; +} + +static int alx_init_sw(struct alx_priv *alx) +{ + struct pci_dev *pdev = alx->hw.pdev; + struct alx_hw *hw = &alx->hw; + int err; + + err = alx_identify_hw(alx); + if (err) { + dev_err(&pdev->dev, "unrecognized chip, aborting\n"); + return err; + } + + alx->hw.lnk_patch = + pdev->device == ALX_DEV_ID_AR8161 && + pdev->subsystem_vendor == PCI_VENDOR_ID_ATTANSIC && + pdev->subsystem_device == 0x0091 && + pdev->revision == 0; + + hw->smb_timer = 400; + hw->mtu = alx->dev->mtu; + alx->rxbuf_size = ALIGN(ALX_RAW_MTU(hw->mtu), 8); + alx->tx_ringsz = 256; + alx->rx_ringsz = 512; + hw->sleep_ctrl = ALX_SLEEP_WOL_MAGIC | ALX_SLEEP_WOL_PHY; + hw->imt = 200; + alx->int_mask = ALX_ISR_MISC; + hw->dma_chnl = hw->max_dma_chnl; + hw->ith_tpd = alx->tx_ringsz / 3; + hw->link_speed = SPEED_UNKNOWN; + hw->adv_cfg = ADVERTISED_Autoneg | + ADVERTISED_10baseT_Half | + ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Full | + ADVERTISED_100baseT_Half | + ADVERTISED_1000baseT_Full; + hw->flowctrl = ALX_FC_ANEG | ALX_FC_RX | ALX_FC_TX; + + hw->rx_ctrl = ALX_MAC_CTRL_WOLSPED_SWEN | + ALX_MAC_CTRL_MHASH_ALG_HI5B | + ALX_MAC_CTRL_BRD_EN | + ALX_MAC_CTRL_PCRCE | + ALX_MAC_CTRL_CRCE | + ALX_MAC_CTRL_RXFC_EN | + ALX_MAC_CTRL_TXFC_EN | + 7 << ALX_MAC_CTRL_PRMBLEN_SHIFT; + + return err; +} + + +static netdev_features_t alx_fix_features(struct net_device *netdev, + netdev_features_t features) +{ + if (netdev->mtu > ALX_MAX_TSO_PKT_SIZE) + features &= ~(NETIF_F_TSO | NETIF_F_TSO6); + + return features; +} + +static void alx_netif_stop(struct alx_priv *alx) +{ + alx->dev->trans_start = jiffies; + if (netif_carrier_ok(alx->dev)) { + netif_carrier_off(alx->dev); + netif_tx_disable(alx->dev); + napi_disable(&alx->napi); + } +} + +static void alx_halt(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + + alx_netif_stop(alx); + hw->link_speed = SPEED_UNKNOWN; + + alx_reset_mac(hw); + + /* disable l0s/l1 */ + alx_enable_aspm(hw, false, false); + alx_irq_disable(alx); + alx_free_buffers(alx); +} + +static void alx_configure(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + + alx_configure_basic(hw); + alx_disable_rss(hw); + __alx_set_rx_mode(alx->dev); + + alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl); +} + +static void alx_activate(struct alx_priv *alx) +{ + /* hardware setting lost, restore it */ + alx_reinit_rings(alx); + alx_configure(alx); + + /* clear old interrupts */ + alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS); + + alx_irq_enable(alx); + + alx_schedule_link_check(alx); +} + +static void alx_reinit(struct alx_priv *alx) +{ + ASSERT_RTNL(); + + alx_halt(alx); + alx_activate(alx); +} + +static int alx_change_mtu(struct net_device *netdev, int mtu) +{ + struct alx_priv *alx = netdev_priv(netdev); + int max_frame = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; + + if ((max_frame < ALX_MIN_FRAME_SIZE) || + (max_frame > ALX_MAX_FRAME_SIZE)) + return -EINVAL; + + if (netdev->mtu == mtu) + return 0; + + netdev->mtu = mtu; + alx->hw.mtu = mtu; + alx->rxbuf_size = mtu > ALX_DEF_RXBUF_SIZE ? + ALIGN(max_frame, 8) : ALX_DEF_RXBUF_SIZE; + netdev_update_features(netdev); + if (netif_running(netdev)) + alx_reinit(alx); + return 0; +} + +static void alx_netif_start(struct alx_priv *alx) +{ + netif_tx_wake_all_queues(alx->dev); + napi_enable(&alx->napi); + netif_carrier_on(alx->dev); +} + +static int __alx_open(struct alx_priv *alx, bool resume) +{ + int err; + + if (!resume) + netif_carrier_off(alx->dev); + + err = alx_alloc_rings(alx); + if (err) + return err; + + alx_configure(alx); + + err = alx_request_irq(alx); + if (err) + goto out_free_rings; + + /* clear old interrupts */ + alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS); + + alx_irq_enable(alx); + + if (!resume) + netif_tx_start_all_queues(alx->dev); + + alx_schedule_link_check(alx); + return 0; + +out_free_rings: + alx_free_rings(alx); + return err; +} + +static void __alx_stop(struct alx_priv *alx) +{ + alx_halt(alx); + alx_free_irq(alx); + alx_free_rings(alx); +} + +static const char *alx_speed_desc(u16 speed) +{ + switch (speed) { + case SPEED_1000 + DUPLEX_FULL: + return "1 Gbps Full"; + case SPEED_100 + DUPLEX_FULL: + return "100 Mbps Full"; + case SPEED_100 + DUPLEX_HALF: + return "100 Mbps Half"; + case SPEED_10 + DUPLEX_FULL: + return "10 Mbps Full"; + case SPEED_10 + DUPLEX_HALF: + return "10 Mbps Half"; + default: + return "Unknown speed"; + } +} + +static void alx_check_link(struct alx_priv *alx) +{ + struct alx_hw *hw = &alx->hw; + unsigned long flags; + int speed, old_speed; + int err; + + /* clear PHY internal interrupt status, otherwise the main + * interrupt status will be asserted forever + */ + alx_clear_phy_intr(hw); + + err = alx_get_phy_link(hw, &speed); + if (err < 0) + goto reset; + + spin_lock_irqsave(&alx->irq_lock, flags); + alx->int_mask |= ALX_ISR_PHY; + alx_write_mem32(hw, ALX_IMR, alx->int_mask); + spin_unlock_irqrestore(&alx->irq_lock, flags); + + old_speed = hw->link_speed; + + if (old_speed == speed) + return; + hw->link_speed = speed; + + if (speed != SPEED_UNKNOWN) { + netif_info(alx, link, alx->dev, + "NIC Up: %s\n", alx_speed_desc(speed)); + alx_post_phy_link(hw); + alx_enable_aspm(hw, true, true); + alx_start_mac(hw); + + if (old_speed == SPEED_UNKNOWN) + alx_netif_start(alx); + } else { + /* link is now down */ + alx_netif_stop(alx); + netif_info(alx, link, alx->dev, "Link Down\n"); + err = alx_reset_mac(hw); + if (err) + goto reset; + alx_irq_disable(alx); + + /* MAC reset causes all HW settings to be lost, restore all */ + err = alx_reinit_rings(alx); + if (err) + goto reset; + alx_configure(alx); + alx_enable_aspm(hw, false, true); + alx_post_phy_link(hw); + alx_irq_enable(alx); + } + + return; + +reset: + alx_schedule_reset(alx); +} + +static int alx_open(struct net_device *netdev) +{ + return __alx_open(netdev_priv(netdev), false); +} + +static int alx_stop(struct net_device *netdev) +{ + __alx_stop(netdev_priv(netdev)); + return 0; +} + +static int __alx_shutdown(struct pci_dev *pdev, bool *wol_en) +{ + struct alx_priv *alx = pci_get_drvdata(pdev); + struct net_device *netdev = alx->dev; + struct alx_hw *hw = &alx->hw; + int err, speed; + + netif_device_detach(netdev); + + if (netif_running(netdev)) + __alx_stop(alx); + +#ifdef CONFIG_PM_SLEEP + err = pci_save_state(pdev); + if (err) + return err; +#endif + + err = alx_select_powersaving_speed(hw, &speed); + if (err) + return err; + err = alx_clear_phy_intr(hw); + if (err) + return err; + err = alx_pre_suspend(hw, speed); + if (err) + return err; + err = alx_config_wol(hw); + if (err) + return err; + + *wol_en = false; + if (hw->sleep_ctrl & ALX_SLEEP_ACTIVE) { + netif_info(alx, wol, netdev, + "wol: ctrl=%X, speed=%X\n", + hw->sleep_ctrl, speed); + device_set_wakeup_enable(&pdev->dev, true); + *wol_en = true; + } + + pci_disable_device(pdev); + + return 0; +} + +static void alx_shutdown(struct pci_dev *pdev) +{ + int err; + bool wol_en; + + err = __alx_shutdown(pdev, &wol_en); + if (!err) { + pci_wake_from_d3(pdev, wol_en); + pci_set_power_state(pdev, PCI_D3hot); + } else { + dev_err(&pdev->dev, "shutdown fail %d\n", err); + } +} + +static void alx_link_check(struct work_struct *work) +{ + struct alx_priv *alx; + + alx = container_of(work, struct alx_priv, link_check_wk); + + rtnl_lock(); + alx_check_link(alx); + rtnl_unlock(); +} + +static void alx_reset(struct work_struct *work) +{ + struct alx_priv *alx = container_of(work, struct alx_priv, reset_wk); + + rtnl_lock(); + alx_reinit(alx); + rtnl_unlock(); +} + +static int alx_tx_csum(struct sk_buff *skb, struct alx_txd *first) +{ + u8 cso, css; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; + + cso = skb_checksum_start_offset(skb); + if (cso & 1) + return -EINVAL; + + css = cso + skb->csum_offset; + first->word1 |= cpu_to_le32((cso >> 1) << TPD_CXSUMSTART_SHIFT); + first->word1 |= cpu_to_le32((css >> 1) << TPD_CXSUMOFFSET_SHIFT); + first->word1 |= cpu_to_le32(1 << TPD_CXSUM_EN_SHIFT); + + return 0; +} + +static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) +{ + struct alx_tx_queue *txq = &alx->txq; + struct alx_txd *tpd, *first_tpd; + dma_addr_t dma; + int maplen, f, first_idx = txq->write_idx; + + first_tpd = &txq->tpd[txq->write_idx]; + tpd = first_tpd; + + maplen = skb_headlen(skb); + dma = dma_map_single(&alx->hw.pdev->dev, skb->data, maplen, + DMA_TO_DEVICE); + if (dma_mapping_error(&alx->hw.pdev->dev, dma)) + goto err_dma; + + dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen); + dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma); + + tpd->adrl.addr = cpu_to_le64(dma); + tpd->len = cpu_to_le16(maplen); + + for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { + struct skb_frag_struct *frag; + + frag = &skb_shinfo(skb)->frags[f]; + + if (++txq->write_idx == alx->tx_ringsz) + txq->write_idx = 0; + tpd = &txq->tpd[txq->write_idx]; + + tpd->word1 = first_tpd->word1; + + maplen = skb_frag_size(frag); + dma = skb_frag_dma_map(&alx->hw.pdev->dev, frag, 0, + maplen, DMA_TO_DEVICE); + if (dma_mapping_error(&alx->hw.pdev->dev, dma)) + goto err_dma; + dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen); + dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma); + + tpd->adrl.addr = cpu_to_le64(dma); + tpd->len = cpu_to_le16(maplen); + } + + /* last TPD, set EOP flag and store skb */ + tpd->word1 |= cpu_to_le32(1 << TPD_EOP_SHIFT); + txq->bufs[txq->write_idx].skb = skb; + + if (++txq->write_idx == alx->tx_ringsz) + txq->write_idx = 0; + + return 0; + +err_dma: + f = first_idx; + while (f != txq->write_idx) { + alx_free_txbuf(alx, f); + if (++f == alx->tx_ringsz) + f = 0; + } + return -ENOMEM; +} + +static netdev_tx_t alx_start_xmit(struct sk_buff *skb, + struct net_device *netdev) +{ + struct alx_priv *alx = netdev_priv(netdev); + struct alx_tx_queue *txq = &alx->txq; + struct alx_txd *first; + int tpdreq = skb_shinfo(skb)->nr_frags + 1; + + if (alx_tpd_avail(alx) < tpdreq) { + netif_stop_queue(alx->dev); + goto drop; + } + + first = &txq->tpd[txq->write_idx]; + memset(first, 0, sizeof(*first)); + + if (alx_tx_csum(skb, first)) + goto drop; + + if (alx_map_tx_skb(alx, skb) < 0) + goto drop; + + netdev_sent_queue(alx->dev, skb->len); + + /* flush updates before updating hardware */ + wmb(); + alx_write_mem16(&alx->hw, ALX_TPD_PRI0_PIDX, txq->write_idx); + + if (alx_tpd_avail(alx) < alx->tx_ringsz/8) + netif_stop_queue(alx->dev); + + return NETDEV_TX_OK; + +drop: + dev_kfree_skb(skb); + return NETDEV_TX_OK; +} + +static void alx_tx_timeout(struct net_device *dev) +{ + struct alx_priv *alx = netdev_priv(dev); + + alx_schedule_reset(alx); +} + +static int alx_mdio_read(struct net_device *netdev, + int prtad, int devad, u16 addr) +{ + struct alx_priv *alx = netdev_priv(netdev); + struct alx_hw *hw = &alx->hw; + u16 val; + int err; + + if (prtad != hw->mdio.prtad) + return -EINVAL; + + if (devad == MDIO_DEVAD_NONE) + err = alx_read_phy_reg(hw, addr, &val); + else + err = alx_read_phy_ext(hw, devad, addr, &val); + + if (err) + return err; + return val; +} + +static int alx_mdio_write(struct net_device *netdev, + int prtad, int devad, u16 addr, u16 val) +{ + struct alx_priv *alx = netdev_priv(netdev); + struct alx_hw *hw = &alx->hw; + + if (prtad != hw->mdio.prtad) + return -EINVAL; + + if (devad == MDIO_DEVAD_NONE) + return alx_write_phy_reg(hw, addr, val); + + return alx_write_phy_ext(hw, devad, addr, val); +} + +static int alx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + struct alx_priv *alx = netdev_priv(netdev); + + if (!netif_running(netdev)) + return -EAGAIN; + + return mdio_mii_ioctl(&alx->hw.mdio, if_mii(ifr), cmd); +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void alx_poll_controller(struct net_device *netdev) +{ + struct alx_priv *alx = netdev_priv(netdev); + + if (alx->msi) + alx_intr_msi(0, alx); + else + alx_intr_legacy(0, alx); +} +#endif + +static const struct net_device_ops alx_netdev_ops = { + .ndo_open = alx_open, + .ndo_stop = alx_stop, + .ndo_start_xmit = alx_start_xmit, + .ndo_set_rx_mode = alx_set_rx_mode, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = alx_set_mac_address, + .ndo_change_mtu = alx_change_mtu, + .ndo_do_ioctl = alx_ioctl, + .ndo_tx_timeout = alx_tx_timeout, + .ndo_fix_features = alx_fix_features, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = alx_poll_controller, +#endif +}; + +static int alx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct alx_priv *alx; + struct alx_hw *hw; + bool phy_configured; + int bars, pm_cap, err; + + err = pci_enable_device_mem(pdev); + if (err) + return err; + + /* The alx chip can DMA to 64-bit addresses, but it uses a single + * shared register for the high 32 bits, so only a single, aligned, + * 4 GB physical address range can be used for descriptors. + */ + if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) && + !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { + dev_dbg(&pdev->dev, "DMA to 64-BIT addresses\n"); + } else { + err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (err) { + err = dma_set_coherent_mask(&pdev->dev, + DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, + "No usable DMA config, aborting\n"); + goto out_pci_disable; + } + } + } + + bars = pci_select_bars(pdev, IORESOURCE_MEM); + err = pci_request_selected_regions(pdev, bars, alx_drv_name); + if (err) { + dev_err(&pdev->dev, + "pci_request_selected_regions failed(bars:%d)\n", bars); + goto out_pci_disable; + } + + pci_enable_pcie_error_reporting(pdev); + pci_set_master(pdev); + + pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM); + if (pm_cap == 0) { + dev_err(&pdev->dev, + "Can't find power management capability, aborting\n"); + err = -EIO; + goto out_pci_release; + } + + err = pci_set_power_state(pdev, PCI_D0); + if (err) + goto out_pci_release; + + netdev = alloc_etherdev(sizeof(*alx)); + if (!netdev) { + err = -ENOMEM; + goto out_pci_release; + } + + SET_NETDEV_DEV(netdev, &pdev->dev); + alx = netdev_priv(netdev); + alx->dev = netdev; + alx->hw.pdev = pdev; + alx->msg_enable = NETIF_MSG_LINK | NETIF_MSG_HW | NETIF_MSG_IFUP | + NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR | NETIF_MSG_WOL; + hw = &alx->hw; + pci_set_drvdata(pdev, alx); + + hw->hw_addr = pci_ioremap_bar(pdev, 0); + if (!hw->hw_addr) { + dev_err(&pdev->dev, "cannot map device registers\n"); + err = -EIO; + goto out_free_netdev; + } + + netdev->netdev_ops = &alx_netdev_ops; + SET_ETHTOOL_OPS(netdev, &alx_ethtool_ops); + netdev->irq = pdev->irq; + netdev->watchdog_timeo = ALX_WATCHDOG_TIME; + + if (ent->driver_data & ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG) + pdev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG; + + err = alx_init_sw(alx); + if (err) { + dev_err(&pdev->dev, "net device private data init failed\n"); + goto out_unmap; + } + + alx_reset_pcie(hw); + + phy_configured = alx_phy_configured(hw); + + if (!phy_configured) + alx_reset_phy(hw); + + err = alx_reset_mac(hw); + if (err) { + dev_err(&pdev->dev, "MAC Reset failed, error = %d\n", err); + goto out_unmap; + } + + /* setup link to put it in a known good starting state */ + if (!phy_configured) { + err = alx_setup_speed_duplex(hw, hw->adv_cfg, hw->flowctrl); + if (err) { + dev_err(&pdev->dev, + "failed to configure PHY speed/duplex (err=%d)\n", + err); + goto out_unmap; + } + } + + netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM; + + if (alx_get_perm_macaddr(hw, hw->perm_addr)) { + dev_warn(&pdev->dev, + "Invalid permanent address programmed, using random one\n"); + eth_hw_addr_random(netdev); + memcpy(hw->perm_addr, netdev->dev_addr, netdev->addr_len); + } + + memcpy(hw->mac_addr, hw->perm_addr, ETH_ALEN); + memcpy(netdev->dev_addr, hw->mac_addr, ETH_ALEN); + memcpy(netdev->perm_addr, hw->perm_addr, ETH_ALEN); + + hw->mdio.prtad = 0; + hw->mdio.mmds = 0; + hw->mdio.dev = netdev; + hw->mdio.mode_support = MDIO_SUPPORTS_C45 | + MDIO_SUPPORTS_C22 | + MDIO_EMULATE_C22; + hw->mdio.mdio_read = alx_mdio_read; + hw->mdio.mdio_write = alx_mdio_write; + + if (!alx_get_phy_info(hw)) { + dev_err(&pdev->dev, "failed to identify PHY\n"); + err = -EIO; + goto out_unmap; + } + + INIT_WORK(&alx->link_check_wk, alx_link_check); + INIT_WORK(&alx->reset_wk, alx_reset); + spin_lock_init(&alx->hw.mdio_lock); + spin_lock_init(&alx->irq_lock); + + netif_carrier_off(netdev); + + err = register_netdev(netdev); + if (err) { + dev_err(&pdev->dev, "register netdevice failed\n"); + goto out_unmap; + } + + device_set_wakeup_enable(&pdev->dev, hw->sleep_ctrl); + + netdev_info(netdev, + "Qualcomm Atheros AR816x/AR817x Ethernet [%pM]\n", + netdev->dev_addr); + + return 0; + +out_unmap: + iounmap(hw->hw_addr); +out_free_netdev: + free_netdev(netdev); +out_pci_release: + pci_release_selected_regions(pdev, bars); +out_pci_disable: + pci_disable_device(pdev); + return err; +} + +static void alx_remove(struct pci_dev *pdev) +{ + struct alx_priv *alx = pci_get_drvdata(pdev); + struct alx_hw *hw = &alx->hw; + + cancel_work_sync(&alx->link_check_wk); + cancel_work_sync(&alx->reset_wk); + + /* restore permanent mac address */ + alx_set_macaddr(hw, hw->perm_addr); + + unregister_netdev(alx->dev); + iounmap(hw->hw_addr); + pci_release_selected_regions(pdev, + pci_select_bars(pdev, IORESOURCE_MEM)); + + pci_disable_pcie_error_reporting(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + + free_netdev(alx->dev); +} + +#ifdef CONFIG_PM_SLEEP +static int alx_suspend(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + int err; + bool wol_en; + + err = __alx_shutdown(pdev, &wol_en); + if (err) { + dev_err(&pdev->dev, "shutdown fail in suspend %d\n", err); + return err; + } + + if (wol_en) { + pci_prepare_to_sleep(pdev); + } else { + pci_wake_from_d3(pdev, false); + pci_set_power_state(pdev, PCI_D3hot); + } + + return 0; +} + +static int alx_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct alx_priv *alx = pci_get_drvdata(pdev); + struct net_device *netdev = alx->dev; + struct alx_hw *hw = &alx->hw; + int err; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + pci_save_state(pdev); + + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + hw->link_speed = SPEED_UNKNOWN; + alx->int_mask = ALX_ISR_MISC; + + alx_reset_pcie(hw); + alx_reset_phy(hw); + + err = alx_reset_mac(hw); + if (err) { + netif_err(alx, hw, alx->dev, + "resume:reset_mac fail %d\n", err); + return -EIO; + } + + err = alx_setup_speed_duplex(hw, hw->adv_cfg, hw->flowctrl); + if (err) { + netif_err(alx, hw, alx->dev, + "resume:setup_speed_duplex fail %d\n", err); + return -EIO; + } + + if (netif_running(netdev)) { + err = __alx_open(alx, true); + if (err) + return err; + } + + netif_device_attach(netdev); + + return err; +} +#endif + +static pci_ers_result_t alx_pci_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + struct alx_priv *alx = pci_get_drvdata(pdev); + struct net_device *netdev = alx->dev; + pci_ers_result_t rc = PCI_ERS_RESULT_NEED_RESET; + + dev_info(&pdev->dev, "pci error detected\n"); + + rtnl_lock(); + + if (netif_running(netdev)) { + netif_device_detach(netdev); + alx_halt(alx); + } + + if (state == pci_channel_io_perm_failure) + rc = PCI_ERS_RESULT_DISCONNECT; + else + pci_disable_device(pdev); + + rtnl_unlock(); + + return rc; +} + +static pci_ers_result_t alx_pci_error_slot_reset(struct pci_dev *pdev) +{ + struct alx_priv *alx = pci_get_drvdata(pdev); + struct alx_hw *hw = &alx->hw; + pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT; + + dev_info(&pdev->dev, "pci error slot reset\n"); + + rtnl_lock(); + + if (pci_enable_device(pdev)) { + dev_err(&pdev->dev, "Failed to re-enable PCI device after reset\n"); + goto out; + } + + pci_set_master(pdev); + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + alx_reset_pcie(hw); + if (!alx_reset_mac(hw)) + rc = PCI_ERS_RESULT_RECOVERED; +out: + pci_cleanup_aer_uncorrect_error_status(pdev); + + rtnl_unlock(); + + return rc; +} + +static void alx_pci_error_resume(struct pci_dev *pdev) +{ + struct alx_priv *alx = pci_get_drvdata(pdev); + struct net_device *netdev = alx->dev; + + dev_info(&pdev->dev, "pci error resume\n"); + + rtnl_lock(); + + if (netif_running(netdev)) { + alx_activate(alx); + netif_device_attach(netdev); + } + + rtnl_unlock(); +} + +static const struct pci_error_handlers alx_err_handlers = { + .error_detected = alx_pci_error_detected, + .slot_reset = alx_pci_error_slot_reset, + .resume = alx_pci_error_resume, +}; + +#ifdef CONFIG_PM_SLEEP +static SIMPLE_DEV_PM_OPS(alx_pm_ops, alx_suspend, alx_resume); +#define ALX_PM_OPS (&alx_pm_ops) +#else +#define ALX_PM_OPS NULL +#endif + +static DEFINE_PCI_DEVICE_TABLE(alx_pci_tbl) = { + { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8161), + .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, + { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2200), + .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, + { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8162), + .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, + { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8171) }, + { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8172) }, + {} +}; + +static struct pci_driver alx_driver = { + .name = alx_drv_name, + .id_table = alx_pci_tbl, + .probe = alx_probe, + .remove = alx_remove, + .shutdown = alx_shutdown, + .err_handler = &alx_err_handlers, + .driver.pm = ALX_PM_OPS, +}; + +module_pci_driver(alx_driver); +MODULE_DEVICE_TABLE(pci, alx_pci_tbl); +MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); +MODULE_AUTHOR("Qualcomm Corporation, <nic-devel@qualcomm.com>"); +MODULE_DESCRIPTION( + "Qualcomm Atheros(R) AR816x/AR817x PCI-E Ethernet Network Driver"); +MODULE_LICENSE("GPL"); |