1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
5 * Derived from Intel e1000 driver
6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
11 char atl1c_driver_name[] = "atl1c";
14 * atl1c_pci_tbl - PCI Device ID Table
16 * Wildcard entries (PCI_ANY_ID) should come last
17 * Last entry must be all 0s
19 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
20 * Class, Class Mask, private data (not used) }
22 static const struct pci_device_id atl1c_pci_tbl[] = {
23 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
24 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
25 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
26 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
27 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
28 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
29 /* required last entry */
32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
34 MODULE_AUTHOR("Jie Yang");
35 MODULE_AUTHOR("Qualcomm Atheros Inc.");
36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
37 MODULE_LICENSE("GPL");
50 static struct atl1c_qregs atl1c_qregs[AT_MAX_TRANSMIT_QUEUE] = {
52 REG_TPD_PRI0_ADDR_LO, REG_TPD_PRI0_PIDX, REG_TPD_PRI0_CIDX,
53 REG_RFD0_HEAD_ADDR_LO, REG_RRD0_HEAD_ADDR_LO,
54 REG_MB_RFD0_PROD_IDX, ISR_TX_PKT_0, ISR_RX_PKT_0
57 REG_TPD_PRI1_ADDR_LO, REG_TPD_PRI1_PIDX, REG_TPD_PRI1_CIDX,
58 REG_RFD1_HEAD_ADDR_LO, REG_RRD1_HEAD_ADDR_LO,
59 REG_MB_RFD1_PROD_IDX, ISR_TX_PKT_1, ISR_RX_PKT_1
62 REG_TPD_PRI2_ADDR_LO, REG_TPD_PRI2_PIDX, REG_TPD_PRI2_CIDX,
63 REG_RFD2_HEAD_ADDR_LO, REG_RRD2_HEAD_ADDR_LO,
64 REG_MB_RFD2_PROD_IDX, ISR_TX_PKT_2, ISR_RX_PKT_2
67 REG_TPD_PRI3_ADDR_LO, REG_TPD_PRI3_PIDX, REG_TPD_PRI3_CIDX,
68 REG_RFD3_HEAD_ADDR_LO, REG_RRD3_HEAD_ADDR_LO,
69 REG_MB_RFD3_PROD_IDX, ISR_TX_PKT_3, ISR_RX_PKT_3
73 static int atl1c_stop_mac(struct atl1c_hw *hw);
74 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
75 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
76 static void atl1c_start_mac(struct atl1c_adapter *adapter);
77 static int atl1c_up(struct atl1c_adapter *adapter);
78 static void atl1c_down(struct atl1c_adapter *adapter);
79 static int atl1c_reset_mac(struct atl1c_hw *hw);
80 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
81 static int atl1c_configure(struct atl1c_adapter *adapter);
82 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
86 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
87 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
88 static void atl1c_pcie_patch(struct atl1c_hw *hw)
92 /* pclk sel could switch to 25M */
93 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
94 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
95 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
97 /* WoL/PCIE related settings */
98 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
99 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
100 data |= PCIE_PHYMISC_FORCE_RCV_DET;
101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
102 } else { /* new dev set bit5 of MASTER */
103 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
104 AT_WRITE_REG(hw, REG_MASTER_CTRL,
105 mst_data | MASTER_CTRL_WAKEN_25M);
107 /* aspm/PCIE setting only for l2cb 1.0 */
108 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
109 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
110 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
111 L2CB1_PCIE_PHYMISC2_CDR_BW);
112 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
113 L2CB1_PCIE_PHYMISC2_L0S_TH);
114 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
115 /* extend L1 sync timer */
116 AT_READ_REG(hw, REG_LINK_CTRL, &data);
117 data |= LINK_CTRL_EXT_SYNC;
118 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
120 /* l2cb 1.x & l1d 1.x */
121 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
122 AT_READ_REG(hw, REG_PM_CTRL, &data);
123 data |= PM_CTRL_L0S_BUFSRX_EN;
124 AT_WRITE_REG(hw, REG_PM_CTRL, data);
125 /* clear vendor msg */
126 AT_READ_REG(hw, REG_DMA_DBG, &data);
127 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
131 /* FIXME: no need any more ? */
133 * atl1c_init_pcie - init PCIE module
135 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
139 struct pci_dev *pdev = hw->adapter->pdev;
142 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
143 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
144 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
146 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
149 * Clear any PowerSaveing Settings
151 pci_enable_wake(pdev, PCI_D3hot, 0);
152 pci_enable_wake(pdev, PCI_D3cold, 0);
153 /* wol sts read-clear */
154 AT_READ_REG(hw, REG_WOL_CTRL, &data);
155 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
158 * Mask some pcie error bits
160 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
162 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
163 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
164 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
166 /* clear error status */
167 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
168 PCI_EXP_DEVSTA_NFED |
173 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
174 data &= ~LTSSM_ID_EN_WRO;
175 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
177 atl1c_pcie_patch(hw);
178 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
179 atl1c_disable_l0s_l1(hw);
185 * atl1c_irq_enable - Enable default interrupt generation settings
186 * @adapter: board private structure
188 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
190 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
191 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
192 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
193 AT_WRITE_FLUSH(&adapter->hw);
198 * atl1c_irq_disable - Mask off interrupt generation on the NIC
199 * @adapter: board private structure
201 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
203 atomic_inc(&adapter->irq_sem);
204 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
205 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
206 AT_WRITE_FLUSH(&adapter->hw);
207 synchronize_irq(adapter->pdev->irq);
211 * atl1c_irq_reset - reset interrupt confiure on the NIC
212 * @adapter: board private structure
214 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
216 atomic_set(&adapter->irq_sem, 1);
217 atl1c_irq_enable(adapter);
221 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
222 * of the idle status register until the device is actually idle
224 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
229 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
230 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
231 if ((data & modu_ctrl) == 0)
239 * atl1c_phy_config - Timer Call-back
240 * @t: timer list containing pointer to netdev cast into an unsigned long
242 static void atl1c_phy_config(struct timer_list *t)
244 struct atl1c_adapter *adapter = from_timer(adapter, t,
246 struct atl1c_hw *hw = &adapter->hw;
249 spin_lock_irqsave(&adapter->mdio_lock, flags);
250 atl1c_restart_autoneg(hw);
251 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
254 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
258 clear_bit(__AT_RESETTING, &adapter->flags);
261 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
263 struct atl1c_hw *hw = &adapter->hw;
264 struct net_device *netdev = adapter->netdev;
265 struct pci_dev *pdev = adapter->pdev;
271 spin_lock_irqsave(&adapter->mdio_lock, flags);
272 link = atl1c_get_link_status(hw);
273 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
277 netif_carrier_off(netdev);
278 hw->hibernate = true;
279 if (atl1c_reset_mac(hw) != 0)
280 if (netif_msg_hw(adapter))
281 dev_warn(&pdev->dev, "reset mac failed\n");
282 atl1c_set_aspm(hw, SPEED_0);
283 atl1c_post_phy_linkchg(hw, SPEED_0);
284 atl1c_reset_dma_ring(adapter);
285 atl1c_configure(adapter);
288 hw->hibernate = false;
289 spin_lock_irqsave(&adapter->mdio_lock, flags);
290 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
291 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
294 /* link result is our setting */
295 if (adapter->link_speed != speed ||
296 adapter->link_duplex != duplex) {
297 adapter->link_speed = speed;
298 adapter->link_duplex = duplex;
299 atl1c_set_aspm(hw, speed);
300 atl1c_post_phy_linkchg(hw, speed);
301 atl1c_start_mac(adapter);
302 if (netif_msg_link(adapter))
304 "%s: %s NIC Link is Up<%d Mbps %s>\n",
305 atl1c_driver_name, netdev->name,
307 adapter->link_duplex == FULL_DUPLEX ?
308 "Full Duplex" : "Half Duplex");
310 if (!netif_carrier_ok(netdev))
311 netif_carrier_on(netdev);
315 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
317 struct net_device *netdev = adapter->netdev;
318 struct pci_dev *pdev = adapter->pdev;
321 spin_lock(&adapter->mdio_lock);
322 link = atl1c_get_link_status(&adapter->hw);
323 spin_unlock(&adapter->mdio_lock);
324 /* notify upper layer link down ASAP */
326 if (netif_carrier_ok(netdev)) {
327 /* old link state: Up */
328 netif_carrier_off(netdev);
329 if (netif_msg_link(adapter))
331 "%s: %s NIC Link is Down\n",
332 atl1c_driver_name, netdev->name);
333 adapter->link_speed = SPEED_0;
337 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
338 schedule_work(&adapter->common_task);
341 static void atl1c_common_task(struct work_struct *work)
343 struct atl1c_adapter *adapter;
344 struct net_device *netdev;
346 adapter = container_of(work, struct atl1c_adapter, common_task);
347 netdev = adapter->netdev;
349 if (test_bit(__AT_DOWN, &adapter->flags))
352 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
353 netif_device_detach(netdev);
356 netif_device_attach(netdev);
359 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
360 &adapter->work_event)) {
361 atl1c_irq_disable(adapter);
362 atl1c_check_link_status(adapter);
363 atl1c_irq_enable(adapter);
368 static void atl1c_del_timer(struct atl1c_adapter *adapter)
370 del_timer_sync(&adapter->phy_config_timer);
375 * atl1c_tx_timeout - Respond to a Tx Hang
376 * @netdev: network interface device structure
377 * @txqueue: index of hanging tx queue
379 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue)
381 struct atl1c_adapter *adapter = netdev_priv(netdev);
383 /* Do the reset outside of interrupt context */
384 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
385 schedule_work(&adapter->common_task);
389 * atl1c_set_multi - Multicast and Promiscuous mode set
390 * @netdev: network interface device structure
392 * The set_multi entry point is called whenever the multicast address
393 * list or the network interface flags are updated. This routine is
394 * responsible for configuring the hardware for proper multicast,
395 * promiscuous mode, and all-multi behavior.
397 static void atl1c_set_multi(struct net_device *netdev)
399 struct atl1c_adapter *adapter = netdev_priv(netdev);
400 struct atl1c_hw *hw = &adapter->hw;
401 struct netdev_hw_addr *ha;
405 /* Check for Promiscuous and All Multicast modes */
406 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
408 if (netdev->flags & IFF_PROMISC) {
409 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
410 } else if (netdev->flags & IFF_ALLMULTI) {
411 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
412 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
414 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
417 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
419 /* clear the old settings from the multicast hash table */
420 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
421 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
423 /* comoute mc addresses' hash value ,and put it into hash table */
424 netdev_for_each_mc_addr(ha, netdev) {
425 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
426 atl1c_hash_set(hw, hash_value);
430 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
432 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
433 /* enable VLAN tag insert/strip */
434 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
436 /* disable VLAN tag insert/strip */
437 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
441 static void atl1c_vlan_mode(struct net_device *netdev,
442 netdev_features_t features)
444 struct atl1c_adapter *adapter = netdev_priv(netdev);
445 struct pci_dev *pdev = adapter->pdev;
446 u32 mac_ctrl_data = 0;
448 if (netif_msg_pktdata(adapter))
449 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
451 atl1c_irq_disable(adapter);
452 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
453 __atl1c_vlan_mode(features, &mac_ctrl_data);
454 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
455 atl1c_irq_enable(adapter);
458 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
460 struct pci_dev *pdev = adapter->pdev;
462 if (netif_msg_pktdata(adapter))
463 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
464 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
468 * atl1c_set_mac_addr - Change the Ethernet Address of the NIC
469 * @netdev: network interface device structure
470 * @p: pointer to an address structure
472 * Returns 0 on success, negative on failure
474 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
476 struct atl1c_adapter *adapter = netdev_priv(netdev);
477 struct sockaddr *addr = p;
479 if (!is_valid_ether_addr(addr->sa_data))
480 return -EADDRNOTAVAIL;
482 if (netif_running(netdev))
485 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
486 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
488 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
493 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
494 struct net_device *dev)
496 unsigned int head_size;
499 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
500 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
502 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD + NET_IP_ALIGN) +
503 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
504 adapter->rx_frag_size = roundup_pow_of_two(head_size);
507 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
508 netdev_features_t features)
510 struct atl1c_adapter *adapter = netdev_priv(netdev);
511 struct atl1c_hw *hw = &adapter->hw;
514 * Since there is no support for separate rx/tx vlan accel
515 * enable/disable make sure tx flag is always in same state as rx.
517 if (features & NETIF_F_HW_VLAN_CTAG_RX)
518 features |= NETIF_F_HW_VLAN_CTAG_TX;
520 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
522 if (hw->nic_type != athr_mt) {
523 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
524 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
530 static int atl1c_set_features(struct net_device *netdev,
531 netdev_features_t features)
533 netdev_features_t changed = netdev->features ^ features;
535 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
536 atl1c_vlan_mode(netdev, features);
541 static void atl1c_set_max_mtu(struct net_device *netdev)
543 struct atl1c_adapter *adapter = netdev_priv(netdev);
544 struct atl1c_hw *hw = &adapter->hw;
546 switch (hw->nic_type) {
547 /* These (GbE) devices support jumbo packets, max_mtu 6122 */
551 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
552 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
555 netdev->max_mtu = 9500;
557 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
559 netdev->max_mtu = ETH_DATA_LEN;
565 * atl1c_change_mtu - Change the Maximum Transfer Unit
566 * @netdev: network interface device structure
567 * @new_mtu: new value for maximum frame size
569 * Returns 0 on success, negative on failure
571 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
573 struct atl1c_adapter *adapter = netdev_priv(netdev);
576 if (netif_running(netdev)) {
577 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
579 netdev->mtu = new_mtu;
580 adapter->hw.max_frame_size = new_mtu;
581 atl1c_set_rxbufsize(adapter, netdev);
583 netdev_update_features(netdev);
585 clear_bit(__AT_RESETTING, &adapter->flags);
591 * caller should hold mdio_lock
593 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
595 struct atl1c_adapter *adapter = netdev_priv(netdev);
598 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
602 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
603 int reg_num, int val)
605 struct atl1c_adapter *adapter = netdev_priv(netdev);
607 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
610 static int atl1c_mii_ioctl(struct net_device *netdev,
611 struct ifreq *ifr, int cmd)
613 struct atl1c_adapter *adapter = netdev_priv(netdev);
614 struct pci_dev *pdev = adapter->pdev;
615 struct mii_ioctl_data *data = if_mii(ifr);
619 if (!netif_running(netdev))
622 spin_lock_irqsave(&adapter->mdio_lock, flags);
629 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
637 if (data->reg_num & ~(0x1F)) {
642 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
643 data->reg_num, data->val_in);
644 if (atl1c_write_phy_reg(&adapter->hw,
645 data->reg_num, data->val_in)) {
652 retval = -EOPNOTSUPP;
656 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
660 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
666 return atl1c_mii_ioctl(netdev, ifr, cmd);
673 * atl1c_alloc_queues - Allocate memory for all rings
674 * @adapter: board private structure to initialize
677 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
682 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev,
685 switch (pdev->device) {
686 case PCI_DEVICE_ID_ATTANSIC_L2C:
688 case PCI_DEVICE_ID_ATTANSIC_L1C:
690 case PCI_DEVICE_ID_ATHEROS_L2C_B:
692 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
694 case PCI_DEVICE_ID_ATHEROS_L1D:
696 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
697 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC)
705 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
709 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
711 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
712 ATL1C_TXQ_MODE_ENHANCE;
713 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
714 ATL1C_ASPM_L1_SUPPORT;
715 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
717 if (hw->nic_type == athr_l1c ||
718 hw->nic_type == athr_l1d ||
719 hw->nic_type == athr_l1d_2)
720 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
724 struct atl1c_platform_patch {
730 #define ATL1C_LINK_PATCH 0x1
732 static const struct atl1c_platform_patch plats[] = {
733 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
734 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
735 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
736 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
737 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
738 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
739 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
740 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
741 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
742 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
743 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
744 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
745 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
746 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
747 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
748 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
749 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
750 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
751 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
755 static void atl1c_patch_assign(struct atl1c_hw *hw)
757 struct pci_dev *pdev = hw->adapter->pdev;
761 hw->msi_lnkpatch = false;
763 while (plats[i].pci_did != 0) {
764 if (plats[i].pci_did == hw->device_id &&
765 plats[i].pci_revid == hw->revision_id &&
766 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
767 plats[i].subsystem_did == hw->subsystem_id) {
768 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
769 hw->msi_lnkpatch = true;
774 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
775 hw->revision_id == L2CB_V21) {
776 /* config access mode */
777 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
778 REG_PCIE_DEV_MISC_CTRL);
779 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
781 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
782 REG_PCIE_DEV_MISC_CTRL);
783 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
787 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
788 * @adapter: board private structure to initialize
790 * atl1c_sw_init initializes the Adapter private data structure.
791 * Fields are initialized based on PCI device information and
792 * OS network device settings (MTU size).
794 static int atl1c_sw_init(struct atl1c_adapter *adapter)
796 struct atl1c_hw *hw = &adapter->hw;
797 struct pci_dev *pdev = adapter->pdev;
802 device_set_wakeup_enable(&pdev->dev, false);
803 adapter->link_speed = SPEED_0;
804 adapter->link_duplex = FULL_DUPLEX;
805 adapter->tpd_ring[0].count = 1024;
806 adapter->rfd_ring[0].count = 512;
808 hw->vendor_id = pdev->vendor;
809 hw->device_id = pdev->device;
810 hw->subsystem_vendor_id = pdev->subsystem_vendor;
811 hw->subsystem_id = pdev->subsystem_device;
812 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
813 hw->revision_id = revision & 0xFF;
814 /* before link up, we assume hibernate is true */
815 hw->hibernate = true;
816 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
817 if (atl1c_setup_mac_funcs(hw) != 0) {
818 dev_err(&pdev->dev, "set mac function pointers failed\n");
821 atl1c_patch_assign(hw);
823 hw->intr_mask = IMR_NORMAL_MASK;
824 for (i = 0; i < adapter->tx_queue_count; ++i)
825 hw->intr_mask |= atl1c_qregs[i].tx_isr;
826 for (i = 0; i < adapter->rx_queue_count; ++i)
827 hw->intr_mask |= atl1c_qregs[i].rx_isr;
828 hw->phy_configured = false;
829 hw->preamble_len = 7;
830 hw->max_frame_size = adapter->netdev->mtu;
831 hw->autoneg_advertised = ADVERTISED_Autoneg;
832 hw->indirect_tab = 0xE4E4E4E4;
835 hw->ict = 50000; /* 100ms */
836 hw->smb_timer = 200000; /* 400ms */
842 hw->dma_order = atl1c_dma_ord_out;
843 hw->dmar_block = atl1c_dma_req_1024;
845 if (atl1c_alloc_queues(adapter)) {
846 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
850 atl1c_set_rxbufsize(adapter, adapter->netdev);
851 atomic_set(&adapter->irq_sem, 1);
852 spin_lock_init(&adapter->mdio_lock);
853 spin_lock_init(&adapter->hw.intr_mask_lock);
854 set_bit(__AT_DOWN, &adapter->flags);
859 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
860 struct atl1c_buffer *buffer_info)
863 if (buffer_info->flags & ATL1C_BUFFER_FREE)
865 if (buffer_info->dma) {
866 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
867 pci_driection = DMA_FROM_DEVICE;
869 pci_driection = DMA_TO_DEVICE;
871 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
872 dma_unmap_single(&pdev->dev, buffer_info->dma,
873 buffer_info->length, pci_driection);
874 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
875 dma_unmap_page(&pdev->dev, buffer_info->dma,
876 buffer_info->length, pci_driection);
878 if (buffer_info->skb)
879 dev_consume_skb_any(buffer_info->skb);
880 buffer_info->dma = 0;
881 buffer_info->skb = NULL;
882 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
885 * atl1c_clean_tx_ring - Free Tx-skb
886 * @adapter: board private structure
887 * @queue: idx of transmit queue
889 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
892 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
893 struct atl1c_buffer *buffer_info;
894 struct pci_dev *pdev = adapter->pdev;
895 u16 index, ring_count;
897 ring_count = tpd_ring->count;
898 for (index = 0; index < ring_count; index++) {
899 buffer_info = &tpd_ring->buffer_info[index];
900 atl1c_clean_buffer(pdev, buffer_info);
903 netdev_reset_queue(adapter->netdev);
905 /* Zero out Tx-buffers */
906 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
908 atomic_set(&tpd_ring->next_to_clean, 0);
909 tpd_ring->next_to_use = 0;
913 * atl1c_clean_rx_ring - Free rx-reservation skbs
914 * @adapter: board private structure
915 * @queue: idx of transmit queue
917 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue)
919 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
920 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
921 struct atl1c_buffer *buffer_info;
922 struct pci_dev *pdev = adapter->pdev;
925 for (j = 0; j < rfd_ring->count; j++) {
926 buffer_info = &rfd_ring->buffer_info[j];
927 atl1c_clean_buffer(pdev, buffer_info);
929 /* zero out the descriptor ring */
930 memset(rfd_ring->desc, 0, rfd_ring->size);
931 rfd_ring->next_to_clean = 0;
932 rfd_ring->next_to_use = 0;
933 rrd_ring->next_to_use = 0;
934 rrd_ring->next_to_clean = 0;
938 * Read / Write Ptr Initialize:
940 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
942 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
943 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
944 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
945 struct atl1c_buffer *buffer_info;
948 for (i = 0; i < adapter->tx_queue_count; i++) {
949 tpd_ring[i].next_to_use = 0;
950 atomic_set(&tpd_ring[i].next_to_clean, 0);
951 buffer_info = tpd_ring[i].buffer_info;
952 for (j = 0; j < tpd_ring->count; j++)
953 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
956 for (i = 0; i < adapter->rx_queue_count; i++) {
957 rfd_ring[i].next_to_use = 0;
958 rfd_ring[i].next_to_clean = 0;
959 rrd_ring[i].next_to_use = 0;
960 rrd_ring[i].next_to_clean = 0;
961 for (j = 0; j < rfd_ring[i].count; j++) {
962 buffer_info = &rfd_ring[i].buffer_info[j];
963 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
969 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
970 * @adapter: board private structure
972 * Free all transmit software resources
974 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
976 struct pci_dev *pdev = adapter->pdev;
979 dma_free_coherent(&pdev->dev, adapter->ring_header.size,
980 adapter->ring_header.desc, adapter->ring_header.dma);
981 adapter->ring_header.desc = NULL;
983 /* Note: just free tdp_ring.buffer_info,
984 * it contain rfd_ring.buffer_info, do not double free
986 if (adapter->tpd_ring[0].buffer_info) {
987 kfree(adapter->tpd_ring[0].buffer_info);
988 adapter->tpd_ring[0].buffer_info = NULL;
990 for (i = 0; i < adapter->rx_queue_count; ++i) {
991 if (adapter->rrd_ring[i].rx_page) {
992 put_page(adapter->rrd_ring[i].rx_page);
993 adapter->rrd_ring[i].rx_page = NULL;
999 * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources
1000 * @adapter: board private structure
1002 * Return 0 on success, negative on failure
1004 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
1006 struct pci_dev *pdev = adapter->pdev;
1007 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1008 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1009 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1010 struct atl1c_ring_header *ring_header = &adapter->ring_header;
1011 int tqc = adapter->tx_queue_count;
1012 int rqc = adapter->rx_queue_count;
1018 /* Even though only one tpd queue is actually used, the "high"
1019 * priority tpd queue also gets initialized
1024 for (i = 1; i < tqc; i++)
1025 tpd_ring[i].count = tpd_ring[0].count;
1027 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc +
1028 rfd_ring->count * rqc);
1029 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1030 if (unlikely(!tpd_ring->buffer_info))
1033 for (i = 0; i < tqc; i++) {
1034 tpd_ring[i].adapter = adapter;
1035 tpd_ring[i].num = i;
1036 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1037 count += tpd_ring[i].count;
1040 for (i = 0; i < rqc; i++) {
1041 rrd_ring[i].adapter = adapter;
1042 rrd_ring[i].num = i;
1043 rrd_ring[i].count = rfd_ring[0].count;
1044 rfd_ring[i].count = rfd_ring[0].count;
1045 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1046 count += rfd_ring->count;
1050 * real ring DMA buffer
1051 * each ring/block may need up to 8 bytes for alignment, hence the
1052 * additional bytes tacked onto the end.
1054 ring_header->size = size =
1055 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc +
1056 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc +
1057 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc +
1060 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1061 &ring_header->dma, GFP_KERNEL);
1062 if (unlikely(!ring_header->desc)) {
1063 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1068 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1069 offset = tpd_ring[0].dma - ring_header->dma;
1070 for (i = 0; i < tqc; i++) {
1071 tpd_ring[i].dma = ring_header->dma + offset;
1072 tpd_ring[i].desc = (u8 *)ring_header->desc + offset;
1074 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1075 offset += roundup(tpd_ring[i].size, 8);
1077 for (i = 0; i < rqc; i++) {
1079 rfd_ring[i].dma = ring_header->dma + offset;
1080 rfd_ring[i].desc = (u8 *)ring_header->desc + offset;
1081 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1083 offset += roundup(rfd_ring[i].size, 8);
1086 rrd_ring[i].dma = ring_header->dma + offset;
1087 rrd_ring[i].desc = (u8 *)ring_header->desc + offset;
1088 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1090 offset += roundup(rrd_ring[i].size, 8);
1096 kfree(tpd_ring->buffer_info);
1100 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1102 struct atl1c_hw *hw = &adapter->hw;
1103 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1104 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1105 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1107 int tx_queue_count = adapter->tx_queue_count;
1109 if (tx_queue_count == 1)
1113 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1114 (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1115 /* just enable normal priority TX queue */
1116 for (i = 0; i < tx_queue_count; i++) {
1117 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo,
1118 (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1120 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1121 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1125 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1126 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1127 for (i = 0; i < adapter->rx_queue_count; i++) {
1128 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo,
1129 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1132 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1133 rfd_ring->count & RFD_RING_SIZE_MASK);
1134 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1135 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1138 for (i = 0; i < adapter->rx_queue_count; i++) {
1139 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo,
1140 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1142 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1143 (rrd_ring->count & RRD_RING_SIZE_MASK));
1145 if (hw->nic_type == athr_l2c_b) {
1146 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1147 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1148 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1149 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1150 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1151 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1152 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1153 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1155 /* Load all of base address above */
1156 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1159 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1161 struct atl1c_hw *hw = &adapter->hw;
1163 u16 tx_offload_thresh;
1166 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1167 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1168 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1169 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1170 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1172 * if BIOS had changed the dam-read-max-length to an invalid value,
1173 * restore it to default value
1175 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1176 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1177 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1180 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1181 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1183 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1186 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1188 struct atl1c_hw *hw = &adapter->hw;
1191 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1192 RXQ_RFD_BURST_NUM_SHIFT;
1194 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1195 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1197 /* aspm for gigabit */
1198 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1199 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1200 ASPM_THRUPUT_LIMIT_100M);
1202 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1205 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1207 struct atl1c_hw *hw = &adapter->hw;
1210 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1211 DMA_CTRL_RREQ_PRI_DATA |
1212 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1213 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1214 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1216 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1220 * Stop the mac, transmit and receive units
1221 * hw - Struct containing variables accessed by shared code
1222 * return : 0 or idle status (if error)
1224 static int atl1c_stop_mac(struct atl1c_hw *hw)
1228 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1229 data &= ~RXQ_CTRL_EN;
1230 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1232 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1233 data &= ~TXQ_CTRL_EN;
1234 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1236 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1238 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1239 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1240 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1242 return (int)atl1c_wait_until_idle(hw,
1243 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1246 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1248 struct atl1c_hw *hw = &adapter->hw;
1251 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX;
1252 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1253 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1255 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1256 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1257 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1261 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1262 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1263 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1264 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1265 MAC_CTRL_HASH_ALG_CRC32;
1267 mac |= MAC_CTRL_DUPLX;
1269 mac &= ~MAC_CTRL_DUPLX;
1270 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1271 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1273 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1274 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1275 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1279 * Reset the transmit and receive units; mask and clear all interrupts.
1280 * hw - Struct containing variables accessed by shared code
1281 * return : 0 or idle status (if error)
1283 static int atl1c_reset_mac(struct atl1c_hw *hw)
1285 struct atl1c_adapter *adapter = hw->adapter;
1286 struct pci_dev *pdev = adapter->pdev;
1291 * Issue Soft Reset to the MAC. This will reset the chip's
1292 * transmit, receive, DMA. It will not effect
1293 * the current PCI configuration. The global reset bit is self-
1294 * clearing, and should clear within a microsecond.
1296 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1297 ctrl_data |= MASTER_CTRL_OOB_DIS;
1298 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1302 /* Wait at least 10ms for All module to be Idle */
1304 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1306 "MAC state machine can't be idle since"
1307 " disabled for 10ms second\n");
1310 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1312 /* driver control speed/duplex */
1313 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1314 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1316 /* clk switch setting */
1317 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1318 switch (hw->nic_type) {
1320 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1321 SERDES_MAC_CLK_SLOWDOWN);
1322 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1326 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1327 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1336 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1338 u16 ctrl_flags = hw->ctrl_flags;
1340 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1341 atl1c_set_aspm(hw, SPEED_0);
1342 hw->ctrl_flags = ctrl_flags;
1347 * Enable/disable L0s/L1 depend on link state.
1349 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1354 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1355 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1356 PM_CTRL_ASPM_L0S_EN |
1357 PM_CTRL_MAC_ASPM_CHK);
1359 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1360 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1362 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1363 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1364 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1365 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1367 link_l1_timer = hw->nic_type == athr_l2c_b ?
1368 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1369 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1371 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1372 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1376 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1377 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1378 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1379 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1381 /* l2cb & l1d & l2cb2 & l1d2 */
1382 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1383 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1384 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1385 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1386 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1387 PM_CTRL_SERDES_PD_EX_L1 |
1389 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1390 PM_CTRL_SERDES_PLL_L1_EN |
1391 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1394 /* disable l0s if link down or l2cb */
1395 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1396 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1399 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1400 if (link_speed != SPEED_0) {
1401 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1402 PM_CTRL_SERDES_PLL_L1_EN |
1403 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1404 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1405 PM_CTRL_CLK_SWH_L1 |
1406 PM_CTRL_ASPM_L0S_EN |
1407 PM_CTRL_ASPM_L1_EN);
1408 } else { /* link down */
1409 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1410 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1411 PM_CTRL_SERDES_PLL_L1_EN |
1412 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1413 PM_CTRL_ASPM_L0S_EN);
1416 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1422 * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset
1423 * @adapter: board private structure
1425 * Configure the Tx /Rx unit of the MAC after a reset.
1427 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1429 struct atl1c_hw *hw = &adapter->hw;
1430 u32 master_ctrl_data = 0;
1431 u32 intr_modrt_data;
1434 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1435 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1436 MASTER_CTRL_RX_ITIMER_EN |
1437 MASTER_CTRL_INT_RDCLR);
1438 /* clear interrupt status */
1439 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1440 /* Clear any WOL status */
1441 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1442 /* set Interrupt Clear Timer
1443 * HW will enable self to assert interrupt event to system after
1444 * waiting x-time for software to notify it accept interrupt.
1447 data = CLK_GATING_EN_ALL;
1448 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1449 if (hw->nic_type == athr_l2c_b)
1450 data &= ~CLK_GATING_RXMAC_EN;
1453 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1455 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1456 hw->ict & INT_RETRIG_TIMER_MASK);
1458 atl1c_configure_des_ring(adapter);
1460 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1461 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1462 IRQ_MODRT_TX_TIMER_SHIFT;
1463 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1464 IRQ_MODRT_RX_TIMER_SHIFT;
1465 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1467 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1470 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1471 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1473 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1474 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1476 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1477 hw->smb_timer & SMB_STAT_TIMER_MASK);
1480 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1481 VLAN_HLEN + ETH_FCS_LEN);
1483 atl1c_configure_tx(adapter);
1484 atl1c_configure_rx(adapter);
1485 atl1c_configure_dma(adapter);
1490 static int atl1c_configure(struct atl1c_adapter *adapter)
1492 struct net_device *netdev = adapter->netdev;
1496 if (adapter->hw.nic_type == athr_mt) {
1499 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode);
1500 if (adapter->rx_queue_count == 4)
1503 mode &= ~MT_MODE_4Q;
1504 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode);
1507 atl1c_init_ring_ptrs(adapter);
1508 atl1c_set_multi(netdev);
1509 atl1c_restore_vlan(adapter);
1511 for (i = 0; i < adapter->rx_queue_count; ++i) {
1512 num = atl1c_alloc_rx_buffer(adapter, i, false);
1513 if (unlikely(num == 0))
1517 if (atl1c_configure_mac(adapter))
1523 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1525 u16 hw_reg_addr = 0;
1526 unsigned long *stats_item = NULL;
1529 /* update rx status */
1530 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1531 stats_item = &adapter->hw_stats.rx_ok;
1532 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1533 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1534 *stats_item += data;
1538 /* update tx status */
1539 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1540 stats_item = &adapter->hw_stats.tx_ok;
1541 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1542 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1543 *stats_item += data;
1550 * atl1c_get_stats - Get System Network Statistics
1551 * @netdev: network interface device structure
1553 * Returns the address of the device statistics structure.
1554 * The statistics are actually updated from the timer callback.
1556 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1558 struct atl1c_adapter *adapter = netdev_priv(netdev);
1559 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1560 struct net_device_stats *net_stats = &netdev->stats;
1562 atl1c_update_hw_stats(adapter);
1563 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1564 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1565 net_stats->multicast = hw_stats->rx_mcast;
1566 net_stats->collisions = hw_stats->tx_1_col +
1567 hw_stats->tx_2_col +
1568 hw_stats->tx_late_col +
1569 hw_stats->tx_abort_col;
1571 net_stats->rx_errors = hw_stats->rx_frag +
1572 hw_stats->rx_fcs_err +
1573 hw_stats->rx_len_err +
1574 hw_stats->rx_sz_ov +
1575 hw_stats->rx_rrd_ov +
1576 hw_stats->rx_align_err +
1577 hw_stats->rx_rxf_ov;
1579 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1580 net_stats->rx_length_errors = hw_stats->rx_len_err;
1581 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1582 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1583 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1585 net_stats->tx_errors = hw_stats->tx_late_col +
1586 hw_stats->tx_abort_col +
1587 hw_stats->tx_underrun +
1590 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1591 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1592 net_stats->tx_window_errors = hw_stats->tx_late_col;
1594 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1595 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1600 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1604 spin_lock(&adapter->mdio_lock);
1605 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1606 spin_unlock(&adapter->mdio_lock);
1609 static int atl1c_clean_tx(struct napi_struct *napi, int budget)
1611 struct atl1c_tpd_ring *tpd_ring =
1612 container_of(napi, struct atl1c_tpd_ring, napi);
1613 struct atl1c_adapter *adapter = tpd_ring->adapter;
1614 struct netdev_queue *txq =
1615 netdev_get_tx_queue(napi->dev, tpd_ring->num);
1616 struct atl1c_buffer *buffer_info;
1617 struct pci_dev *pdev = adapter->pdev;
1618 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1619 u16 hw_next_to_clean;
1620 unsigned int total_bytes = 0, total_packets = 0;
1621 unsigned long flags;
1623 AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons,
1626 while (next_to_clean != hw_next_to_clean) {
1627 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1628 if (buffer_info->skb) {
1629 total_bytes += buffer_info->skb->len;
1632 atl1c_clean_buffer(pdev, buffer_info);
1633 if (++next_to_clean == tpd_ring->count)
1635 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1638 netdev_tx_completed_queue(txq, total_packets, total_bytes);
1640 if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev))
1641 netif_tx_wake_queue(txq);
1643 if (total_packets < budget) {
1644 napi_complete_done(napi, total_packets);
1645 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1646 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr;
1647 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1648 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1649 return total_packets;
1654 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status)
1656 struct atl1c_hw *hw = &adapter->hw;
1660 spin_lock(&hw->intr_mask_lock);
1661 intr_mask = hw->intr_mask;
1662 for (i = 0; i < adapter->rx_queue_count; ++i) {
1663 if (!(status & atl1c_qregs[i].rx_isr))
1665 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) {
1666 intr_mask &= ~atl1c_qregs[i].rx_isr;
1667 __napi_schedule(&adapter->rrd_ring[i].napi);
1670 for (i = 0; i < adapter->tx_queue_count; ++i) {
1671 if (!(status & atl1c_qregs[i].tx_isr))
1673 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) {
1674 intr_mask &= ~atl1c_qregs[i].tx_isr;
1675 __napi_schedule(&adapter->tpd_ring[i].napi);
1679 if (hw->intr_mask != intr_mask) {
1680 hw->intr_mask = intr_mask;
1681 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1683 spin_unlock(&hw->intr_mask_lock);
1687 * atl1c_intr - Interrupt Handler
1688 * @irq: interrupt number
1689 * @data: pointer to a network interface device structure
1691 static irqreturn_t atl1c_intr(int irq, void *data)
1693 struct net_device *netdev = data;
1694 struct atl1c_adapter *adapter = netdev_priv(netdev);
1695 struct pci_dev *pdev = adapter->pdev;
1696 struct atl1c_hw *hw = &adapter->hw;
1697 int max_ints = AT_MAX_INT_WORK;
1698 int handled = IRQ_NONE;
1703 AT_READ_REG(hw, REG_ISR, ®_data);
1704 status = reg_data & hw->intr_mask;
1706 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1707 if (max_ints != AT_MAX_INT_WORK)
1708 handled = IRQ_HANDLED;
1712 if (status & ISR_GPHY)
1713 atl1c_clear_phy_int(adapter);
1715 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1716 if (status & (ISR_RX_PKT | ISR_TX_PKT))
1717 atl1c_intr_rx_tx(adapter, status);
1719 handled = IRQ_HANDLED;
1720 /* check if PCIE PHY Link down */
1721 if (status & ISR_ERROR) {
1722 if (netif_msg_hw(adapter))
1724 "atl1c hardware error (status = 0x%x)\n",
1725 status & ISR_ERROR);
1727 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1728 schedule_work(&adapter->common_task);
1732 if (status & ISR_OVER)
1733 if (netif_msg_intr(adapter))
1734 dev_warn(&pdev->dev,
1735 "TX/RX overflow (status = 0x%x)\n",
1739 if (status & (ISR_GPHY | ISR_MANUAL)) {
1740 netdev->stats.tx_carrier_errors++;
1741 atl1c_link_chg_event(adapter);
1745 } while (--max_ints > 0);
1746 /* re-enable Interrupt*/
1747 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1751 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1752 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1754 if (adapter->hw.nic_type == athr_mt) {
1755 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP)
1756 skb->ip_summed = CHECKSUM_UNNECESSARY;
1760 * The pid field in RRS in not correct sometimes, so we
1761 * cannot figure out if the packet is fragmented or not,
1762 * so we tell the KERNEL CHECKSUM_NONE
1764 skb_checksum_none_assert(skb);
1767 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter,
1768 u32 queue, bool napi_mode)
1770 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
1771 struct sk_buff *skb;
1774 if (adapter->rx_frag_size > PAGE_SIZE) {
1775 if (likely(napi_mode))
1776 return napi_alloc_skb(&rrd_ring->napi,
1777 adapter->rx_buffer_len);
1779 return netdev_alloc_skb_ip_align(adapter->netdev,
1780 adapter->rx_buffer_len);
1783 page = rrd_ring->rx_page;
1785 page = alloc_page(GFP_ATOMIC);
1786 if (unlikely(!page))
1788 rrd_ring->rx_page = page;
1789 rrd_ring->rx_page_offset = 0;
1792 skb = build_skb(page_address(page) + rrd_ring->rx_page_offset,
1793 adapter->rx_frag_size);
1795 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1796 rrd_ring->rx_page_offset += adapter->rx_frag_size;
1797 if (rrd_ring->rx_page_offset >= PAGE_SIZE)
1798 rrd_ring->rx_page = NULL;
1805 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
1808 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
1809 struct pci_dev *pdev = adapter->pdev;
1810 struct atl1c_buffer *buffer_info, *next_info;
1811 struct sk_buff *skb;
1812 void *vir_addr = NULL;
1814 u16 rfd_next_to_use, next_next;
1815 struct atl1c_rx_free_desc *rfd_desc;
1818 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1819 if (++next_next == rfd_ring->count)
1821 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1822 next_info = &rfd_ring->buffer_info[next_next];
1824 while (next_info->flags & ATL1C_BUFFER_FREE) {
1825 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1827 skb = atl1c_alloc_skb(adapter, queue, napi_mode);
1828 if (unlikely(!skb)) {
1829 if (netif_msg_rx_err(adapter))
1830 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1835 * Make buffer alignment 2 beyond a 16 byte boundary
1836 * this will result in a 16 byte aligned IP header after
1837 * the 14 byte MAC header is removed
1839 vir_addr = skb->data;
1840 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1841 buffer_info->skb = skb;
1842 buffer_info->length = adapter->rx_buffer_len;
1843 mapping = dma_map_single(&pdev->dev, vir_addr,
1844 buffer_info->length, DMA_FROM_DEVICE);
1845 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1847 buffer_info->skb = NULL;
1848 buffer_info->length = 0;
1849 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1850 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1853 buffer_info->dma = mapping;
1854 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1855 ATL1C_PCIMAP_FROMDEVICE);
1856 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1857 rfd_next_to_use = next_next;
1858 if (++next_next == rfd_ring->count)
1860 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1861 next_info = &rfd_ring->buffer_info[next_next];
1866 /* TODO: update mailbox here */
1868 rfd_ring->next_to_use = rfd_next_to_use;
1869 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod,
1870 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1876 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1877 struct atl1c_recv_ret_status *rrs, u16 num)
1880 /* the relationship between rrd and rfd is one map one */
1881 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1882 rrd_ring->next_to_clean)) {
1883 rrs->word3 &= ~RRS_RXD_UPDATED;
1884 if (++rrd_ring->next_to_clean == rrd_ring->count)
1885 rrd_ring->next_to_clean = 0;
1889 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1890 struct atl1c_recv_ret_status *rrs, u16 num)
1894 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1896 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1897 RRS_RX_RFD_INDEX_MASK;
1898 for (i = 0; i < num; i++) {
1899 buffer_info[rfd_index].skb = NULL;
1900 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1902 if (++rfd_index == rfd_ring->count)
1905 rfd_ring->next_to_clean = rfd_index;
1909 * atl1c_clean_rx - NAPI Rx polling callback
1911 * @budget: limit of packets to clean
1913 static int atl1c_clean_rx(struct napi_struct *napi, int budget)
1915 struct atl1c_rrd_ring *rrd_ring =
1916 container_of(napi, struct atl1c_rrd_ring, napi);
1917 struct atl1c_adapter *adapter = rrd_ring->adapter;
1918 u16 rfd_num, rfd_index;
1920 struct pci_dev *pdev = adapter->pdev;
1921 struct net_device *netdev = adapter->netdev;
1922 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num];
1923 struct sk_buff *skb;
1924 struct atl1c_recv_ret_status *rrs;
1925 struct atl1c_buffer *buffer_info;
1927 unsigned long flags;
1929 /* Keep link state information with original netdev */
1930 if (!netif_carrier_ok(adapter->netdev))
1934 if (work_done >= budget)
1936 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1937 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1938 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1939 RRS_RX_RFD_CNT_MASK;
1940 if (unlikely(rfd_num != 1))
1941 /* TODO support mul rfd*/
1942 if (netif_msg_rx_err(adapter))
1943 dev_warn(&pdev->dev,
1944 "Multi rfd not support yet!\n");
1950 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1951 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1952 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1953 if (netif_msg_rx_err(adapter))
1954 dev_warn(&pdev->dev,
1955 "wrong packet! rrs word3 is %x\n",
1960 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1963 if (likely(rfd_num == 1)) {
1964 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1965 RRS_RX_RFD_INDEX_MASK;
1966 buffer_info = &rfd_ring->buffer_info[rfd_index];
1967 dma_unmap_single(&pdev->dev, buffer_info->dma,
1968 buffer_info->length, DMA_FROM_DEVICE);
1969 skb = buffer_info->skb;
1972 if (netif_msg_rx_err(adapter))
1973 dev_warn(&pdev->dev,
1974 "Multi rfd not support yet!\n");
1977 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1978 skb_put(skb, length - ETH_FCS_LEN);
1979 skb->protocol = eth_type_trans(skb, netdev);
1980 atl1c_rx_checksum(adapter, skb, rrs);
1981 if (rrs->word3 & RRS_VLAN_INS) {
1984 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1985 vlan = le16_to_cpu(vlan);
1986 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1988 napi_gro_receive(napi, skb);
1993 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true);
1995 if (work_done < budget) {
1997 napi_complete_done(napi, work_done);
1998 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1999 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr;
2000 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
2001 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
2006 #ifdef CONFIG_NET_POLL_CONTROLLER
2009 * Polling 'interrupt' - used by things like netconsole to send skbs
2010 * without having to re-enable interrupts. It's not called while
2011 * the interrupt routine is executing.
2013 static void atl1c_netpoll(struct net_device *netdev)
2015 struct atl1c_adapter *adapter = netdev_priv(netdev);
2017 disable_irq(adapter->pdev->irq);
2018 atl1c_intr(adapter->pdev->irq, netdev);
2019 enable_irq(adapter->pdev->irq);
2023 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue)
2025 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2026 u16 next_to_use = 0;
2027 u16 next_to_clean = 0;
2029 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2030 next_to_use = tpd_ring->next_to_use;
2032 return (u16)(next_to_clean > next_to_use) ?
2033 (next_to_clean - next_to_use - 1) :
2034 (tpd_ring->count + next_to_clean - next_to_use - 1);
2038 * get next usable tpd
2039 * Note: should call atl1c_tdp_avail to make sure
2040 * there is enough tpd to use
2042 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
2045 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2046 struct atl1c_tpd_desc *tpd_desc;
2047 u16 next_to_use = 0;
2049 next_to_use = tpd_ring->next_to_use;
2050 if (++tpd_ring->next_to_use == tpd_ring->count)
2051 tpd_ring->next_to_use = 0;
2052 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
2053 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
2057 static struct atl1c_buffer *
2058 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
2060 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
2062 return &tpd_ring->buffer_info[tpd -
2063 (struct atl1c_tpd_desc *)tpd_ring->desc];
2066 /* Calculate the transmit packet descript needed*/
2067 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2070 u16 proto_hdr_len = 0;
2072 tpd_req = skb_shinfo(skb)->nr_frags + 1;
2074 if (skb_is_gso(skb)) {
2075 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2076 if (proto_hdr_len < skb_headlen(skb))
2078 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2084 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2085 struct sk_buff *skb,
2086 struct atl1c_tpd_desc **tpd,
2089 struct pci_dev *pdev = adapter->pdev;
2090 unsigned short offload_type;
2094 if (skb_is_gso(skb)) {
2097 err = skb_cow_head(skb, 0);
2101 offload_type = skb_shinfo(skb)->gso_type;
2103 if (offload_type & SKB_GSO_TCPV4) {
2104 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2105 + ntohs(ip_hdr(skb)->tot_len));
2107 if (real_len < skb->len)
2108 pskb_trim(skb, real_len);
2110 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2111 if (unlikely(skb->len == hdr_len)) {
2112 /* only xsum need */
2113 if (netif_msg_tx_queued(adapter))
2114 dev_warn(&pdev->dev,
2115 "IPV4 tso with zero data??\n");
2118 ip_hdr(skb)->check = 0;
2119 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2123 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2127 if (offload_type & SKB_GSO_TCPV6) {
2128 struct atl1c_tpd_ext_desc *etpd =
2129 *(struct atl1c_tpd_ext_desc **)(tpd);
2131 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2132 *tpd = atl1c_get_tpd(adapter, queue);
2133 ipv6_hdr(skb)->payload_len = 0;
2134 /* check payload == 0 byte ? */
2135 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2136 if (unlikely(skb->len == hdr_len)) {
2137 /* only xsum need */
2138 if (netif_msg_tx_queued(adapter))
2139 dev_warn(&pdev->dev,
2140 "IPV6 tso with zero data??\n");
2143 tcp_v6_gso_csum_prep(skb);
2145 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2146 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2147 etpd->pkt_len = cpu_to_le32(skb->len);
2148 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2151 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2152 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2153 TPD_TCPHDR_OFFSET_SHIFT;
2154 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2160 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2162 cso = skb_checksum_start_offset(skb);
2164 if (unlikely(cso & 0x1)) {
2165 if (netif_msg_tx_err(adapter))
2166 dev_err(&adapter->pdev->dev,
2167 "payload offset should not an event number\n");
2170 css = cso + skb->csum_offset;
2172 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2173 TPD_PLOADOFFSET_SHIFT;
2174 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2175 TPD_CCSUM_OFFSET_SHIFT;
2176 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2182 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2183 struct atl1c_tpd_desc *first_tpd,
2186 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue];
2187 struct atl1c_buffer *buffer_info;
2188 struct atl1c_tpd_desc *tpd;
2189 u16 first_index, index;
2191 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2192 index = first_index;
2193 while (index != tpd_ring->next_to_use) {
2194 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2195 buffer_info = &tpd_ring->buffer_info[index];
2196 atl1c_clean_buffer(adpt->pdev, buffer_info);
2197 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2198 if (++index == tpd_ring->count)
2201 tpd_ring->next_to_use = first_index;
2204 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2205 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2208 struct atl1c_tpd_desc *use_tpd = NULL;
2209 struct atl1c_buffer *buffer_info = NULL;
2210 u16 buf_len = skb_headlen(skb);
2218 nr_frags = skb_shinfo(skb)->nr_frags;
2219 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2222 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2225 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2226 buffer_info->length = map_len;
2227 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2230 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2232 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2233 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2234 ATL1C_PCIMAP_TODEVICE);
2235 mapped_len += map_len;
2236 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2237 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2240 if (mapped_len < buf_len) {
2241 /* mapped_len == 0, means we should use the first tpd,
2242 which is given by caller */
2243 if (mapped_len == 0)
2246 use_tpd = atl1c_get_tpd(adapter, queue);
2247 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2249 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2250 buffer_info->length = buf_len - mapped_len;
2252 dma_map_single(&adapter->pdev->dev,
2253 skb->data + mapped_len,
2254 buffer_info->length, DMA_TO_DEVICE);
2255 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2258 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2259 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2260 ATL1C_PCIMAP_TODEVICE);
2261 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2262 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2265 for (f = 0; f < nr_frags; f++) {
2266 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2268 use_tpd = atl1c_get_tpd(adapter, queue);
2269 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2271 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2272 buffer_info->length = skb_frag_size(frag);
2273 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2275 buffer_info->length,
2277 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2280 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2281 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2282 ATL1C_PCIMAP_TODEVICE);
2283 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2284 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2288 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2289 /* The last buffer info contain the skb address,
2290 so it will be free after unmap */
2291 buffer_info->skb = skb;
2296 buffer_info->dma = 0;
2297 buffer_info->length = 0;
2301 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue)
2303 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2305 AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod,
2306 tpd_ring->next_to_use);
2309 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2310 struct net_device *netdev)
2312 struct atl1c_adapter *adapter = netdev_priv(netdev);
2313 u32 queue = skb_get_queue_mapping(skb);
2314 struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue);
2315 struct atl1c_tpd_desc *tpd;
2318 if (test_bit(__AT_DOWN, &adapter->flags)) {
2319 dev_kfree_skb_any(skb);
2320 return NETDEV_TX_OK;
2323 tpd_req = atl1c_cal_tpd_req(skb);
2325 if (atl1c_tpd_avail(adapter, queue) < tpd_req) {
2326 /* no enough descriptor, just stop queue */
2327 atl1c_tx_queue(adapter, queue);
2328 netif_tx_stop_queue(txq);
2329 return NETDEV_TX_BUSY;
2332 tpd = atl1c_get_tpd(adapter, queue);
2334 /* do TSO and check sum */
2335 if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) {
2336 atl1c_tx_queue(adapter, queue);
2337 dev_kfree_skb_any(skb);
2338 return NETDEV_TX_OK;
2341 if (unlikely(skb_vlan_tag_present(skb))) {
2342 u16 vlan = skb_vlan_tag_get(skb);
2345 vlan = cpu_to_le16(vlan);
2346 AT_VLAN_TO_TAG(vlan, tag);
2347 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2348 tpd->vlan_tag = tag;
2351 if (skb_network_offset(skb) != ETH_HLEN)
2352 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2354 if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) {
2355 netif_info(adapter, tx_done, adapter->netdev,
2356 "tx-skb dropped due to dma error\n");
2357 /* roll back tpd/buffer */
2358 atl1c_tx_rollback(adapter, tpd, queue);
2359 dev_kfree_skb_any(skb);
2361 bool more = netdev_xmit_more();
2363 if (__netdev_tx_sent_queue(txq, skb->len, more))
2364 atl1c_tx_queue(adapter, queue);
2367 return NETDEV_TX_OK;
2370 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2372 struct net_device *netdev = adapter->netdev;
2374 free_irq(adapter->pdev->irq, netdev);
2376 if (adapter->have_msi)
2377 pci_disable_msi(adapter->pdev);
2380 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2382 struct pci_dev *pdev = adapter->pdev;
2383 struct net_device *netdev = adapter->netdev;
2387 adapter->have_msi = true;
2388 err = pci_enable_msi(adapter->pdev);
2390 if (netif_msg_ifup(adapter))
2392 "Unable to allocate MSI interrupt Error: %d\n",
2394 adapter->have_msi = false;
2397 if (!adapter->have_msi)
2398 flags |= IRQF_SHARED;
2399 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2400 netdev->name, netdev);
2402 if (netif_msg_ifup(adapter))
2404 "Unable to allocate interrupt Error: %d\n",
2406 if (adapter->have_msi)
2407 pci_disable_msi(adapter->pdev);
2410 if (netif_msg_ifup(adapter))
2411 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2416 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2419 /* release tx-pending skbs and reset tx/rx ring index */
2420 for (i = 0; i < adapter->tx_queue_count; ++i)
2421 atl1c_clean_tx_ring(adapter, i);
2422 for (i = 0; i < adapter->rx_queue_count; ++i)
2423 atl1c_clean_rx_ring(adapter, i);
2426 static int atl1c_up(struct atl1c_adapter *adapter)
2428 struct net_device *netdev = adapter->netdev;
2432 netif_carrier_off(netdev);
2434 err = atl1c_configure(adapter);
2438 err = atl1c_request_irq(adapter);
2442 atl1c_check_link_status(adapter);
2443 clear_bit(__AT_DOWN, &adapter->flags);
2444 for (i = 0; i < adapter->tx_queue_count; ++i)
2445 napi_enable(&adapter->tpd_ring[i].napi);
2446 for (i = 0; i < adapter->rx_queue_count; ++i)
2447 napi_enable(&adapter->rrd_ring[i].napi);
2448 atl1c_irq_enable(adapter);
2449 netif_start_queue(netdev);
2453 for (i = 0; i < adapter->rx_queue_count; ++i)
2454 atl1c_clean_rx_ring(adapter, i);
2458 static void atl1c_down(struct atl1c_adapter *adapter)
2460 struct net_device *netdev = adapter->netdev;
2463 atl1c_del_timer(adapter);
2464 adapter->work_event = 0; /* clear all event */
2465 /* signal that we're down so the interrupt handler does not
2466 * reschedule our watchdog timer */
2467 set_bit(__AT_DOWN, &adapter->flags);
2468 netif_carrier_off(netdev);
2469 for (i = 0; i < adapter->tx_queue_count; ++i)
2470 napi_disable(&adapter->tpd_ring[i].napi);
2471 for (i = 0; i < adapter->rx_queue_count; ++i)
2472 napi_disable(&adapter->rrd_ring[i].napi);
2473 atl1c_irq_disable(adapter);
2474 atl1c_free_irq(adapter);
2475 /* disable ASPM if device inactive */
2476 atl1c_disable_l0s_l1(&adapter->hw);
2477 /* reset MAC to disable all RX/TX */
2478 atl1c_reset_mac(&adapter->hw);
2481 adapter->link_speed = SPEED_0;
2482 adapter->link_duplex = -1;
2483 atl1c_reset_dma_ring(adapter);
2487 * atl1c_open - Called when a network interface is made active
2488 * @netdev: network interface device structure
2490 * Returns 0 on success, negative value on failure
2492 * The open entry point is called when a network interface is made
2493 * active by the system (IFF_UP). At this point all resources needed
2494 * for transmit and receive operations are allocated, the interrupt
2495 * handler is registered with the OS, the watchdog timer is started,
2496 * and the stack is notified that the interface is ready.
2498 static int atl1c_open(struct net_device *netdev)
2500 struct atl1c_adapter *adapter = netdev_priv(netdev);
2503 /* disallow open during test */
2504 if (test_bit(__AT_TESTING, &adapter->flags))
2507 /* allocate rx/tx dma buffer & descriptors */
2508 err = atl1c_setup_ring_resources(adapter);
2512 err = atl1c_up(adapter);
2519 atl1c_free_irq(adapter);
2520 atl1c_free_ring_resources(adapter);
2521 atl1c_reset_mac(&adapter->hw);
2526 * atl1c_close - Disables a network interface
2527 * @netdev: network interface device structure
2529 * Returns 0, this is not allowed to fail
2531 * The close entry point is called when an interface is de-activated
2532 * by the OS. The hardware is still under the drivers control, but
2533 * needs to be disabled. A global MAC reset is issued to stop the
2534 * hardware, and all transmit and receive resources are freed.
2536 static int atl1c_close(struct net_device *netdev)
2538 struct atl1c_adapter *adapter = netdev_priv(netdev);
2540 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2541 set_bit(__AT_DOWN, &adapter->flags);
2542 cancel_work_sync(&adapter->common_task);
2543 atl1c_down(adapter);
2544 atl1c_free_ring_resources(adapter);
2548 static int atl1c_suspend(struct device *dev)
2550 struct net_device *netdev = dev_get_drvdata(dev);
2551 struct atl1c_adapter *adapter = netdev_priv(netdev);
2552 struct atl1c_hw *hw = &adapter->hw;
2553 u32 wufc = adapter->wol;
2555 atl1c_disable_l0s_l1(hw);
2556 if (netif_running(netdev)) {
2557 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2558 atl1c_down(adapter);
2560 netif_device_detach(netdev);
2563 if (atl1c_phy_to_ps_link(hw) != 0)
2564 dev_dbg(dev, "phy power saving failed");
2566 atl1c_power_saving(hw, wufc);
2571 #ifdef CONFIG_PM_SLEEP
2572 static int atl1c_resume(struct device *dev)
2574 struct net_device *netdev = dev_get_drvdata(dev);
2575 struct atl1c_adapter *adapter = netdev_priv(netdev);
2577 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2578 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2580 atl1c_phy_reset(&adapter->hw);
2581 atl1c_reset_mac(&adapter->hw);
2582 atl1c_phy_init(&adapter->hw);
2584 netif_device_attach(netdev);
2585 if (netif_running(netdev))
2592 static void atl1c_shutdown(struct pci_dev *pdev)
2594 struct net_device *netdev = pci_get_drvdata(pdev);
2595 struct atl1c_adapter *adapter = netdev_priv(netdev);
2597 atl1c_suspend(&pdev->dev);
2598 pci_wake_from_d3(pdev, adapter->wol);
2599 pci_set_power_state(pdev, PCI_D3hot);
2602 static const struct net_device_ops atl1c_netdev_ops = {
2603 .ndo_open = atl1c_open,
2604 .ndo_stop = atl1c_close,
2605 .ndo_validate_addr = eth_validate_addr,
2606 .ndo_start_xmit = atl1c_xmit_frame,
2607 .ndo_set_mac_address = atl1c_set_mac_addr,
2608 .ndo_set_rx_mode = atl1c_set_multi,
2609 .ndo_change_mtu = atl1c_change_mtu,
2610 .ndo_fix_features = atl1c_fix_features,
2611 .ndo_set_features = atl1c_set_features,
2612 .ndo_eth_ioctl = atl1c_ioctl,
2613 .ndo_tx_timeout = atl1c_tx_timeout,
2614 .ndo_get_stats = atl1c_get_stats,
2615 #ifdef CONFIG_NET_POLL_CONTROLLER
2616 .ndo_poll_controller = atl1c_netpoll,
2620 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2622 SET_NETDEV_DEV(netdev, &pdev->dev);
2623 pci_set_drvdata(pdev, netdev);
2625 netdev->netdev_ops = &atl1c_netdev_ops;
2626 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2627 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2628 atl1c_set_ethtool_ops(netdev);
2630 /* TODO: add when ready */
2631 netdev->hw_features = NETIF_F_SG |
2633 NETIF_F_HW_VLAN_CTAG_RX |
2636 netdev->features = netdev->hw_features |
2637 NETIF_F_HW_VLAN_CTAG_TX;
2642 * atl1c_probe - Device Initialization Routine
2643 * @pdev: PCI device information struct
2644 * @ent: entry in atl1c_pci_tbl
2646 * Returns 0 on success, negative on failure
2648 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2649 * The OS initialization, configuring of the adapter private structure,
2650 * and a hardware reset occur.
2652 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2654 struct net_device *netdev;
2655 struct atl1c_adapter *adapter;
2656 static int cards_found;
2657 u8 __iomem *hw_addr;
2658 enum atl1c_nic_type nic_type;
2659 u32 queue_count = 1;
2663 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2664 err = pci_enable_device_mem(pdev);
2666 dev_err(&pdev->dev, "cannot enable PCI device\n");
2671 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2672 * shared register for the high 32 bits, so only a single, aligned,
2673 * 4 GB physical address range can be used at a time.
2675 * Supporting 64-bit DMA on this hardware is more trouble than it's
2676 * worth. It is far easier to limit to 32-bit DMA than update
2677 * various kernel subsystems to support the mechanics required by a
2678 * fixed-high-32-bit system.
2680 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2682 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2686 err = pci_request_regions(pdev, atl1c_driver_name);
2688 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2692 pci_set_master(pdev);
2694 hw_addr = pci_ioremap_bar(pdev, 0);
2697 dev_err(&pdev->dev, "cannot map device registers\n");
2701 nic_type = atl1c_get_mac_type(pdev, hw_addr);
2702 if (nic_type == athr_mt)
2705 netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count);
2706 if (netdev == NULL) {
2708 goto err_alloc_etherdev;
2711 err = atl1c_init_netdev(netdev, pdev);
2713 dev_err(&pdev->dev, "init netdevice failed\n");
2714 goto err_init_netdev;
2716 adapter = netdev_priv(netdev);
2717 adapter->bd_number = cards_found;
2718 adapter->netdev = netdev;
2719 adapter->pdev = pdev;
2720 adapter->hw.adapter = adapter;
2721 adapter->hw.nic_type = nic_type;
2722 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2723 adapter->hw.hw_addr = hw_addr;
2724 adapter->tx_queue_count = queue_count;
2725 adapter->rx_queue_count = queue_count;
2728 adapter->mii.dev = netdev;
2729 adapter->mii.mdio_read = atl1c_mdio_read;
2730 adapter->mii.mdio_write = atl1c_mdio_write;
2731 adapter->mii.phy_id_mask = 0x1f;
2732 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2733 dev_set_threaded(netdev, true);
2734 for (i = 0; i < adapter->rx_queue_count; ++i)
2735 netif_napi_add(netdev, &adapter->rrd_ring[i].napi,
2736 atl1c_clean_rx, 64);
2737 for (i = 0; i < adapter->tx_queue_count; ++i)
2738 netif_napi_add(netdev, &adapter->tpd_ring[i].napi,
2739 atl1c_clean_tx, 64);
2740 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2741 /* setup the private structure */
2742 err = atl1c_sw_init(adapter);
2744 dev_err(&pdev->dev, "net device private data init failed\n");
2748 atl1c_set_max_mtu(netdev);
2750 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2752 /* Init GPHY as early as possible due to power saving issue */
2753 atl1c_phy_reset(&adapter->hw);
2755 err = atl1c_reset_mac(&adapter->hw);
2761 /* reset the controller to
2762 * put the device in a known good starting state */
2763 err = atl1c_phy_init(&adapter->hw);
2768 if (atl1c_read_mac_addr(&adapter->hw)) {
2769 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2770 netdev->addr_assign_type = NET_ADDR_RANDOM;
2772 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2773 if (netif_msg_probe(adapter))
2774 dev_dbg(&pdev->dev, "mac address : %pM\n",
2775 adapter->hw.mac_addr);
2777 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2778 INIT_WORK(&adapter->common_task, atl1c_common_task);
2779 adapter->work_event = 0;
2780 err = register_netdev(netdev);
2782 dev_err(&pdev->dev, "register netdevice failed\n");
2793 free_netdev(netdev);
2797 pci_release_regions(pdev);
2800 pci_disable_device(pdev);
2805 * atl1c_remove - Device Removal Routine
2806 * @pdev: PCI device information struct
2808 * atl1c_remove is called by the PCI subsystem to alert the driver
2809 * that it should release a PCI device. The could be caused by a
2810 * Hot-Plug event, or because the driver is going to be removed from
2813 static void atl1c_remove(struct pci_dev *pdev)
2815 struct net_device *netdev = pci_get_drvdata(pdev);
2816 struct atl1c_adapter *adapter = netdev_priv(netdev);
2818 unregister_netdev(netdev);
2819 /* restore permanent address */
2820 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2821 atl1c_phy_disable(&adapter->hw);
2823 iounmap(adapter->hw.hw_addr);
2825 pci_release_regions(pdev);
2826 pci_disable_device(pdev);
2827 free_netdev(netdev);
2831 * atl1c_io_error_detected - called when PCI error is detected
2832 * @pdev: Pointer to PCI device
2833 * @state: The current pci connection state
2835 * This function is called after a PCI bus error affecting
2836 * this device has been detected.
2838 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2839 pci_channel_state_t state)
2841 struct net_device *netdev = pci_get_drvdata(pdev);
2842 struct atl1c_adapter *adapter = netdev_priv(netdev);
2844 netif_device_detach(netdev);
2846 if (state == pci_channel_io_perm_failure)
2847 return PCI_ERS_RESULT_DISCONNECT;
2849 if (netif_running(netdev))
2850 atl1c_down(adapter);
2852 pci_disable_device(pdev);
2854 /* Request a slot slot reset. */
2855 return PCI_ERS_RESULT_NEED_RESET;
2859 * atl1c_io_slot_reset - called after the pci bus has been reset.
2860 * @pdev: Pointer to PCI device
2862 * Restart the card from scratch, as if from a cold-boot. Implementation
2863 * resembles the first-half of the e1000_resume routine.
2865 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2867 struct net_device *netdev = pci_get_drvdata(pdev);
2868 struct atl1c_adapter *adapter = netdev_priv(netdev);
2870 if (pci_enable_device(pdev)) {
2871 if (netif_msg_hw(adapter))
2873 "Cannot re-enable PCI device after reset\n");
2874 return PCI_ERS_RESULT_DISCONNECT;
2876 pci_set_master(pdev);
2878 pci_enable_wake(pdev, PCI_D3hot, 0);
2879 pci_enable_wake(pdev, PCI_D3cold, 0);
2881 atl1c_reset_mac(&adapter->hw);
2883 return PCI_ERS_RESULT_RECOVERED;
2887 * atl1c_io_resume - called when traffic can start flowing again.
2888 * @pdev: Pointer to PCI device
2890 * This callback is called when the error recovery driver tells us that
2891 * its OK to resume normal operation. Implementation resembles the
2892 * second-half of the atl1c_resume routine.
2894 static void atl1c_io_resume(struct pci_dev *pdev)
2896 struct net_device *netdev = pci_get_drvdata(pdev);
2897 struct atl1c_adapter *adapter = netdev_priv(netdev);
2899 if (netif_running(netdev)) {
2900 if (atl1c_up(adapter)) {
2901 if (netif_msg_hw(adapter))
2903 "Cannot bring device back up after reset\n");
2908 netif_device_attach(netdev);
2911 static const struct pci_error_handlers atl1c_err_handler = {
2912 .error_detected = atl1c_io_error_detected,
2913 .slot_reset = atl1c_io_slot_reset,
2914 .resume = atl1c_io_resume,
2917 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2919 static struct pci_driver atl1c_driver = {
2920 .name = atl1c_driver_name,
2921 .id_table = atl1c_pci_tbl,
2922 .probe = atl1c_probe,
2923 .remove = atl1c_remove,
2924 .shutdown = atl1c_shutdown,
2925 .err_handler = &atl1c_err_handler,
2926 .driver.pm = &atl1c_pm_ops,
2929 module_pci_driver(atl1c_driver);