2 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
4 * Derived from Intel e1000 driver
5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59
19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #define ATL1C_DRV_VERSION "1.0.1.1-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
29 * atl1c_pci_tbl - PCI Device ID Table
31 * Wildcard entries (PCI_ANY_ID) should come last
32 * Last entry must be all 0s
34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
35 * Class, Class Mask, private data (not used) }
37 static const struct pci_device_id atl1c_pci_tbl[] = {
38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
44 /* required last entry */
47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
49 MODULE_AUTHOR("Jie Yang");
50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
51 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_VERSION(ATL1C_DRV_VERSION);
55 static int atl1c_stop_mac(struct atl1c_hw *hw);
56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
60 int *work_done, int work_to_do);
61 static int atl1c_up(struct atl1c_adapter *adapter);
62 static void atl1c_down(struct atl1c_adapter *adapter);
63 static int atl1c_reset_mac(struct atl1c_hw *hw);
64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
65 static int atl1c_configure(struct atl1c_adapter *adapter);
66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
68 static const u16 atl1c_pay_load_size[] = {
69 128, 256, 512, 1024, 2048, 4096,
73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
74 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
79 /* pclk sel could switch to 25M */
80 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
81 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
82 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
84 /* WoL/PCIE related settings */
85 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
86 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
87 data |= PCIE_PHYMISC_FORCE_RCV_DET;
88 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
89 } else { /* new dev set bit5 of MASTER */
90 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
91 AT_WRITE_REG(hw, REG_MASTER_CTRL,
92 mst_data | MASTER_CTRL_WAKEN_25M);
94 /* aspm/PCIE setting only for l2cb 1.0 */
95 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
96 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
97 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
98 L2CB1_PCIE_PHYMISC2_CDR_BW);
99 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
100 L2CB1_PCIE_PHYMISC2_L0S_TH);
101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
102 /* extend L1 sync timer */
103 AT_READ_REG(hw, REG_LINK_CTRL, &data);
104 data |= LINK_CTRL_EXT_SYNC;
105 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
107 /* l2cb 1.x & l1d 1.x */
108 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
109 AT_READ_REG(hw, REG_PM_CTRL, &data);
110 data |= PM_CTRL_L0S_BUFSRX_EN;
111 AT_WRITE_REG(hw, REG_PM_CTRL, data);
112 /* clear vendor msg */
113 AT_READ_REG(hw, REG_DMA_DBG, &data);
114 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
118 /* FIXME: no need any more ? */
120 * atl1c_init_pcie - init PCIE module
122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
126 struct pci_dev *pdev = hw->adapter->pdev;
129 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
130 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
131 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
133 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
136 * Clear any PowerSaveing Settings
138 pci_enable_wake(pdev, PCI_D3hot, 0);
139 pci_enable_wake(pdev, PCI_D3cold, 0);
140 /* wol sts read-clear */
141 AT_READ_REG(hw, REG_WOL_CTRL, &data);
142 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
145 * Mask some pcie error bits
147 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
149 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
150 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
151 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
153 /* clear error status */
154 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
155 PCI_EXP_DEVSTA_NFED |
160 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
161 data &= ~LTSSM_ID_EN_WRO;
162 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
164 atl1c_pcie_patch(hw);
165 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
166 atl1c_disable_l0s_l1(hw);
172 * atl1c_irq_enable - Enable default interrupt generation settings
173 * @adapter: board private structure
175 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
177 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
178 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
179 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
180 AT_WRITE_FLUSH(&adapter->hw);
185 * atl1c_irq_disable - Mask off interrupt generation on the NIC
186 * @adapter: board private structure
188 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
190 atomic_inc(&adapter->irq_sem);
191 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
192 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
193 AT_WRITE_FLUSH(&adapter->hw);
194 synchronize_irq(adapter->pdev->irq);
198 * atl1c_irq_reset - reset interrupt confiure on the NIC
199 * @adapter: board private structure
201 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
203 atomic_set(&adapter->irq_sem, 1);
204 atl1c_irq_enable(adapter);
208 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
209 * of the idle status register until the device is actually idle
211 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
216 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
217 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
218 if ((data & modu_ctrl) == 0)
226 * atl1c_phy_config - Timer Call-back
227 * @data: pointer to netdev cast into an unsigned long
229 static void atl1c_phy_config(unsigned long data)
231 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
232 struct atl1c_hw *hw = &adapter->hw;
235 spin_lock_irqsave(&adapter->mdio_lock, flags);
236 atl1c_restart_autoneg(hw);
237 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
240 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
242 WARN_ON(in_interrupt());
245 clear_bit(__AT_RESETTING, &adapter->flags);
248 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
250 struct atl1c_hw *hw = &adapter->hw;
251 struct net_device *netdev = adapter->netdev;
252 struct pci_dev *pdev = adapter->pdev;
255 u16 speed, duplex, phy_data;
257 spin_lock_irqsave(&adapter->mdio_lock, flags);
258 /* MII_BMSR must read twise */
259 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
260 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
261 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
263 if ((phy_data & BMSR_LSTATUS) == 0) {
265 netif_carrier_off(netdev);
266 hw->hibernate = true;
267 if (atl1c_reset_mac(hw) != 0)
268 if (netif_msg_hw(adapter))
269 dev_warn(&pdev->dev, "reset mac failed\n");
270 atl1c_set_aspm(hw, SPEED_0);
271 atl1c_post_phy_linkchg(hw, SPEED_0);
272 atl1c_reset_dma_ring(adapter);
273 atl1c_configure(adapter);
276 hw->hibernate = false;
277 spin_lock_irqsave(&adapter->mdio_lock, flags);
278 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
279 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
282 /* link result is our setting */
283 if (adapter->link_speed != speed ||
284 adapter->link_duplex != duplex) {
285 adapter->link_speed = speed;
286 adapter->link_duplex = duplex;
287 atl1c_set_aspm(hw, speed);
288 atl1c_post_phy_linkchg(hw, speed);
289 atl1c_start_mac(adapter);
290 if (netif_msg_link(adapter))
292 "%s: %s NIC Link is Up<%d Mbps %s>\n",
293 atl1c_driver_name, netdev->name,
295 adapter->link_duplex == FULL_DUPLEX ?
296 "Full Duplex" : "Half Duplex");
298 if (!netif_carrier_ok(netdev))
299 netif_carrier_on(netdev);
303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
305 struct net_device *netdev = adapter->netdev;
306 struct pci_dev *pdev = adapter->pdev;
310 spin_lock(&adapter->mdio_lock);
311 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
312 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
313 spin_unlock(&adapter->mdio_lock);
314 link_up = phy_data & BMSR_LSTATUS;
315 /* notify upper layer link down ASAP */
317 if (netif_carrier_ok(netdev)) {
318 /* old link state: Up */
319 netif_carrier_off(netdev);
320 if (netif_msg_link(adapter))
322 "%s: %s NIC Link is Down\n",
323 atl1c_driver_name, netdev->name);
324 adapter->link_speed = SPEED_0;
328 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
329 schedule_work(&adapter->common_task);
332 static void atl1c_common_task(struct work_struct *work)
334 struct atl1c_adapter *adapter;
335 struct net_device *netdev;
337 adapter = container_of(work, struct atl1c_adapter, common_task);
338 netdev = adapter->netdev;
340 if (test_bit(__AT_DOWN, &adapter->flags))
343 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
344 netif_device_detach(netdev);
347 netif_device_attach(netdev);
350 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
351 &adapter->work_event)) {
352 atl1c_irq_disable(adapter);
353 atl1c_check_link_status(adapter);
354 atl1c_irq_enable(adapter);
359 static void atl1c_del_timer(struct atl1c_adapter *adapter)
361 del_timer_sync(&adapter->phy_config_timer);
366 * atl1c_tx_timeout - Respond to a Tx Hang
367 * @netdev: network interface device structure
369 static void atl1c_tx_timeout(struct net_device *netdev)
371 struct atl1c_adapter *adapter = netdev_priv(netdev);
373 /* Do the reset outside of interrupt context */
374 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
375 schedule_work(&adapter->common_task);
379 * atl1c_set_multi - Multicast and Promiscuous mode set
380 * @netdev: network interface device structure
382 * The set_multi entry point is called whenever the multicast address
383 * list or the network interface flags are updated. This routine is
384 * responsible for configuring the hardware for proper multicast,
385 * promiscuous mode, and all-multi behavior.
387 static void atl1c_set_multi(struct net_device *netdev)
389 struct atl1c_adapter *adapter = netdev_priv(netdev);
390 struct atl1c_hw *hw = &adapter->hw;
391 struct netdev_hw_addr *ha;
395 /* Check for Promiscuous and All Multicast modes */
396 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
398 if (netdev->flags & IFF_PROMISC) {
399 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
400 } else if (netdev->flags & IFF_ALLMULTI) {
401 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
402 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
404 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
407 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
409 /* clear the old settings from the multicast hash table */
410 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
411 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
413 /* comoute mc addresses' hash value ,and put it into hash table */
414 netdev_for_each_mc_addr(ha, netdev) {
415 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
416 atl1c_hash_set(hw, hash_value);
420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
422 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
423 /* enable VLAN tag insert/strip */
424 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
426 /* disable VLAN tag insert/strip */
427 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
431 static void atl1c_vlan_mode(struct net_device *netdev,
432 netdev_features_t features)
434 struct atl1c_adapter *adapter = netdev_priv(netdev);
435 struct pci_dev *pdev = adapter->pdev;
436 u32 mac_ctrl_data = 0;
438 if (netif_msg_pktdata(adapter))
439 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
441 atl1c_irq_disable(adapter);
442 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
443 __atl1c_vlan_mode(features, &mac_ctrl_data);
444 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
445 atl1c_irq_enable(adapter);
448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
450 struct pci_dev *pdev = adapter->pdev;
452 if (netif_msg_pktdata(adapter))
453 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
454 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
458 * atl1c_set_mac - Change the Ethernet Address of the NIC
459 * @netdev: network interface device structure
460 * @p: pointer to an address structure
462 * Returns 0 on success, negative on failure
464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
466 struct atl1c_adapter *adapter = netdev_priv(netdev);
467 struct sockaddr *addr = p;
469 if (!is_valid_ether_addr(addr->sa_data))
470 return -EADDRNOTAVAIL;
472 if (netif_running(netdev))
475 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
476 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
478 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
484 struct net_device *dev)
486 unsigned int head_size;
489 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
490 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
492 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
493 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
494 adapter->rx_frag_size = roundup_pow_of_two(head_size);
497 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
498 netdev_features_t features)
501 * Since there is no support for separate rx/tx vlan accel
502 * enable/disable make sure tx flag is always in same state as rx.
504 if (features & NETIF_F_HW_VLAN_CTAG_RX)
505 features |= NETIF_F_HW_VLAN_CTAG_TX;
507 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
509 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
510 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
515 static int atl1c_set_features(struct net_device *netdev,
516 netdev_features_t features)
518 netdev_features_t changed = netdev->features ^ features;
520 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
521 atl1c_vlan_mode(netdev, features);
527 * atl1c_change_mtu - Change the Maximum Transfer Unit
528 * @netdev: network interface device structure
529 * @new_mtu: new value for maximum frame size
531 * Returns 0 on success, negative on failure
533 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
535 struct atl1c_adapter *adapter = netdev_priv(netdev);
536 struct atl1c_hw *hw = &adapter->hw;
537 int old_mtu = netdev->mtu;
538 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
540 /* Fast Ethernet controller doesn't support jumbo packet */
541 if (((hw->nic_type == athr_l2c ||
542 hw->nic_type == athr_l2c_b ||
543 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
544 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
545 max_frame > MAX_JUMBO_FRAME_SIZE) {
546 if (netif_msg_link(adapter))
547 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
551 if (old_mtu != new_mtu && netif_running(netdev)) {
552 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
554 netdev->mtu = new_mtu;
555 adapter->hw.max_frame_size = new_mtu;
556 atl1c_set_rxbufsize(adapter, netdev);
558 netdev_update_features(netdev);
560 clear_bit(__AT_RESETTING, &adapter->flags);
566 * caller should hold mdio_lock
568 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
570 struct atl1c_adapter *adapter = netdev_priv(netdev);
573 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
577 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
578 int reg_num, int val)
580 struct atl1c_adapter *adapter = netdev_priv(netdev);
582 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
585 static int atl1c_mii_ioctl(struct net_device *netdev,
586 struct ifreq *ifr, int cmd)
588 struct atl1c_adapter *adapter = netdev_priv(netdev);
589 struct pci_dev *pdev = adapter->pdev;
590 struct mii_ioctl_data *data = if_mii(ifr);
594 if (!netif_running(netdev))
597 spin_lock_irqsave(&adapter->mdio_lock, flags);
604 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
612 if (data->reg_num & ~(0x1F)) {
617 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
618 data->reg_num, data->val_in);
619 if (atl1c_write_phy_reg(&adapter->hw,
620 data->reg_num, data->val_in)) {
627 retval = -EOPNOTSUPP;
631 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
635 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
641 return atl1c_mii_ioctl(netdev, ifr, cmd);
648 * atl1c_alloc_queues - Allocate memory for all rings
649 * @adapter: board private structure to initialize
652 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
657 static void atl1c_set_mac_type(struct atl1c_hw *hw)
659 switch (hw->device_id) {
660 case PCI_DEVICE_ID_ATTANSIC_L2C:
661 hw->nic_type = athr_l2c;
663 case PCI_DEVICE_ID_ATTANSIC_L1C:
664 hw->nic_type = athr_l1c;
666 case PCI_DEVICE_ID_ATHEROS_L2C_B:
667 hw->nic_type = athr_l2c_b;
669 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
670 hw->nic_type = athr_l2c_b2;
672 case PCI_DEVICE_ID_ATHEROS_L1D:
673 hw->nic_type = athr_l1d;
675 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
676 hw->nic_type = athr_l1d_2;
683 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
687 atl1c_set_mac_type(hw);
688 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
690 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
691 ATL1C_TXQ_MODE_ENHANCE;
692 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
693 ATL1C_ASPM_L1_SUPPORT;
694 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
696 if (hw->nic_type == athr_l1c ||
697 hw->nic_type == athr_l1d ||
698 hw->nic_type == athr_l1d_2)
699 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
703 struct atl1c_platform_patch {
709 #define ATL1C_LINK_PATCH 0x1
711 static const struct atl1c_platform_patch plats[] = {
712 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
713 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
714 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
715 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
716 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
717 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
718 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
719 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
720 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
721 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
722 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
723 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
724 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
725 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
726 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
727 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
728 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
729 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
730 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
734 static void atl1c_patch_assign(struct atl1c_hw *hw)
736 struct pci_dev *pdev = hw->adapter->pdev;
740 hw->msi_lnkpatch = false;
742 while (plats[i].pci_did != 0) {
743 if (plats[i].pci_did == hw->device_id &&
744 plats[i].pci_revid == hw->revision_id &&
745 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
746 plats[i].subsystem_did == hw->subsystem_id) {
747 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
748 hw->msi_lnkpatch = true;
753 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
754 hw->revision_id == L2CB_V21) {
755 /* config access mode */
756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
757 REG_PCIE_DEV_MISC_CTRL);
758 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
760 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
761 REG_PCIE_DEV_MISC_CTRL);
762 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
766 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
767 * @adapter: board private structure to initialize
769 * atl1c_sw_init initializes the Adapter private data structure.
770 * Fields are initialized based on PCI device information and
771 * OS network device settings (MTU size).
773 static int atl1c_sw_init(struct atl1c_adapter *adapter)
775 struct atl1c_hw *hw = &adapter->hw;
776 struct pci_dev *pdev = adapter->pdev;
781 device_set_wakeup_enable(&pdev->dev, false);
782 adapter->link_speed = SPEED_0;
783 adapter->link_duplex = FULL_DUPLEX;
784 adapter->tpd_ring[0].count = 1024;
785 adapter->rfd_ring.count = 512;
787 hw->vendor_id = pdev->vendor;
788 hw->device_id = pdev->device;
789 hw->subsystem_vendor_id = pdev->subsystem_vendor;
790 hw->subsystem_id = pdev->subsystem_device;
791 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
792 hw->revision_id = revision & 0xFF;
793 /* before link up, we assume hibernate is true */
794 hw->hibernate = true;
795 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
796 if (atl1c_setup_mac_funcs(hw) != 0) {
797 dev_err(&pdev->dev, "set mac function pointers failed\n");
800 atl1c_patch_assign(hw);
802 hw->intr_mask = IMR_NORMAL_MASK;
803 hw->phy_configured = false;
804 hw->preamble_len = 7;
805 hw->max_frame_size = adapter->netdev->mtu;
806 hw->autoneg_advertised = ADVERTISED_Autoneg;
807 hw->indirect_tab = 0xE4E4E4E4;
810 hw->ict = 50000; /* 100ms */
811 hw->smb_timer = 200000; /* 400ms */
817 hw->dma_order = atl1c_dma_ord_out;
818 hw->dmar_block = atl1c_dma_req_1024;
820 if (atl1c_alloc_queues(adapter)) {
821 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
825 atl1c_set_rxbufsize(adapter, adapter->netdev);
826 atomic_set(&adapter->irq_sem, 1);
827 spin_lock_init(&adapter->mdio_lock);
828 spin_lock_init(&adapter->tx_lock);
829 set_bit(__AT_DOWN, &adapter->flags);
834 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
835 struct atl1c_buffer *buffer_info)
838 if (buffer_info->flags & ATL1C_BUFFER_FREE)
840 if (buffer_info->dma) {
841 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
842 pci_driection = PCI_DMA_FROMDEVICE;
844 pci_driection = PCI_DMA_TODEVICE;
846 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
847 pci_unmap_single(pdev, buffer_info->dma,
848 buffer_info->length, pci_driection);
849 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
850 pci_unmap_page(pdev, buffer_info->dma,
851 buffer_info->length, pci_driection);
853 if (buffer_info->skb)
854 dev_consume_skb_any(buffer_info->skb);
855 buffer_info->dma = 0;
856 buffer_info->skb = NULL;
857 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
860 * atl1c_clean_tx_ring - Free Tx-skb
861 * @adapter: board private structure
863 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
864 enum atl1c_trans_queue type)
866 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
867 struct atl1c_buffer *buffer_info;
868 struct pci_dev *pdev = adapter->pdev;
869 u16 index, ring_count;
871 ring_count = tpd_ring->count;
872 for (index = 0; index < ring_count; index++) {
873 buffer_info = &tpd_ring->buffer_info[index];
874 atl1c_clean_buffer(pdev, buffer_info);
877 netdev_reset_queue(adapter->netdev);
879 /* Zero out Tx-buffers */
880 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
882 atomic_set(&tpd_ring->next_to_clean, 0);
883 tpd_ring->next_to_use = 0;
887 * atl1c_clean_rx_ring - Free rx-reservation skbs
888 * @adapter: board private structure
890 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
892 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
893 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
894 struct atl1c_buffer *buffer_info;
895 struct pci_dev *pdev = adapter->pdev;
898 for (j = 0; j < rfd_ring->count; j++) {
899 buffer_info = &rfd_ring->buffer_info[j];
900 atl1c_clean_buffer(pdev, buffer_info);
902 /* zero out the descriptor ring */
903 memset(rfd_ring->desc, 0, rfd_ring->size);
904 rfd_ring->next_to_clean = 0;
905 rfd_ring->next_to_use = 0;
906 rrd_ring->next_to_use = 0;
907 rrd_ring->next_to_clean = 0;
911 * Read / Write Ptr Initialize:
913 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
915 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
916 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
917 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
918 struct atl1c_buffer *buffer_info;
921 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
922 tpd_ring[i].next_to_use = 0;
923 atomic_set(&tpd_ring[i].next_to_clean, 0);
924 buffer_info = tpd_ring[i].buffer_info;
925 for (j = 0; j < tpd_ring->count; j++)
926 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
929 rfd_ring->next_to_use = 0;
930 rfd_ring->next_to_clean = 0;
931 rrd_ring->next_to_use = 0;
932 rrd_ring->next_to_clean = 0;
933 for (j = 0; j < rfd_ring->count; j++) {
934 buffer_info = &rfd_ring->buffer_info[j];
935 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
940 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
941 * @adapter: board private structure
943 * Free all transmit software resources
945 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
947 struct pci_dev *pdev = adapter->pdev;
949 pci_free_consistent(pdev, adapter->ring_header.size,
950 adapter->ring_header.desc,
951 adapter->ring_header.dma);
952 adapter->ring_header.desc = NULL;
954 /* Note: just free tdp_ring.buffer_info,
955 * it contain rfd_ring.buffer_info, do not double free */
956 if (adapter->tpd_ring[0].buffer_info) {
957 kfree(adapter->tpd_ring[0].buffer_info);
958 adapter->tpd_ring[0].buffer_info = NULL;
960 if (adapter->rx_page) {
961 put_page(adapter->rx_page);
962 adapter->rx_page = NULL;
967 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
968 * @adapter: board private structure
970 * Return 0 on success, negative on failure
972 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
974 struct pci_dev *pdev = adapter->pdev;
975 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
976 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
977 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
978 struct atl1c_ring_header *ring_header = &adapter->ring_header;
982 int rx_desc_count = 0;
985 rrd_ring->count = rfd_ring->count;
986 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
987 tpd_ring[i].count = tpd_ring[0].count;
989 /* 2 tpd queue, one high priority queue,
990 * another normal priority queue */
991 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
993 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
994 if (unlikely(!tpd_ring->buffer_info))
997 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
998 tpd_ring[i].buffer_info =
999 (tpd_ring->buffer_info + count);
1000 count += tpd_ring[i].count;
1003 rfd_ring->buffer_info =
1004 (tpd_ring->buffer_info + count);
1005 count += rfd_ring->count;
1006 rx_desc_count += rfd_ring->count;
1009 * real ring DMA buffer
1010 * each ring/block may need up to 8 bytes for alignment, hence the
1011 * additional bytes tacked onto the end.
1013 ring_header->size = size =
1014 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1015 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1016 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1019 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1021 if (unlikely(!ring_header->desc)) {
1022 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1025 memset(ring_header->desc, 0, ring_header->size);
1028 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1029 offset = tpd_ring[0].dma - ring_header->dma;
1030 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1031 tpd_ring[i].dma = ring_header->dma + offset;
1032 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1034 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1035 offset += roundup(tpd_ring[i].size, 8);
1038 rfd_ring->dma = ring_header->dma + offset;
1039 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1040 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1041 offset += roundup(rfd_ring->size, 8);
1044 rrd_ring->dma = ring_header->dma + offset;
1045 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1046 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1048 offset += roundup(rrd_ring->size, 8);
1053 kfree(tpd_ring->buffer_info);
1057 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1059 struct atl1c_hw *hw = &adapter->hw;
1060 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1061 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1062 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1066 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1067 (u32)((tpd_ring[atl1c_trans_normal].dma &
1068 AT_DMA_HI_ADDR_MASK) >> 32));
1069 /* just enable normal priority TX queue */
1070 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1071 (u32)(tpd_ring[atl1c_trans_normal].dma &
1072 AT_DMA_LO_ADDR_MASK));
1073 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1074 (u32)(tpd_ring[atl1c_trans_high].dma &
1075 AT_DMA_LO_ADDR_MASK));
1076 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1077 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1081 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1082 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1083 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1084 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1086 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1087 rfd_ring->count & RFD_RING_SIZE_MASK);
1088 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1089 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1092 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1093 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1094 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1095 (rrd_ring->count & RRD_RING_SIZE_MASK));
1097 if (hw->nic_type == athr_l2c_b) {
1098 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1099 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1100 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1101 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1102 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1103 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1104 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1105 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1107 /* Load all of base address above */
1108 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1111 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1113 struct atl1c_hw *hw = &adapter->hw;
1115 u16 tx_offload_thresh;
1118 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1119 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1120 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1121 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1122 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1124 * if BIOS had changed the dam-read-max-length to an invalid value,
1125 * restore it to default value
1127 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1128 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1129 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1132 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1133 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1135 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1138 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1140 struct atl1c_hw *hw = &adapter->hw;
1143 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1144 RXQ_RFD_BURST_NUM_SHIFT;
1146 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1147 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1149 /* aspm for gigabit */
1150 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1151 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1152 ASPM_THRUPUT_LIMIT_100M);
1154 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1157 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1159 struct atl1c_hw *hw = &adapter->hw;
1162 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1163 DMA_CTRL_RREQ_PRI_DATA |
1164 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1165 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1166 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1168 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1172 * Stop the mac, transmit and receive units
1173 * hw - Struct containing variables accessed by shared code
1174 * return : 0 or idle status (if error)
1176 static int atl1c_stop_mac(struct atl1c_hw *hw)
1180 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1181 data &= ~RXQ_CTRL_EN;
1182 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1184 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1185 data &= ~TXQ_CTRL_EN;
1186 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1188 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1190 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1191 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1192 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1194 return (int)atl1c_wait_until_idle(hw,
1195 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1198 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1200 struct atl1c_hw *hw = &adapter->hw;
1203 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1204 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1205 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1207 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1208 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1209 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1213 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1214 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1215 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1216 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1217 MAC_CTRL_HASH_ALG_CRC32;
1219 mac |= MAC_CTRL_DUPLX;
1221 mac &= ~MAC_CTRL_DUPLX;
1222 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1223 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1225 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1226 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1227 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1231 * Reset the transmit and receive units; mask and clear all interrupts.
1232 * hw - Struct containing variables accessed by shared code
1233 * return : 0 or idle status (if error)
1235 static int atl1c_reset_mac(struct atl1c_hw *hw)
1237 struct atl1c_adapter *adapter = hw->adapter;
1238 struct pci_dev *pdev = adapter->pdev;
1243 * Issue Soft Reset to the MAC. This will reset the chip's
1244 * transmit, receive, DMA. It will not effect
1245 * the current PCI configuration. The global reset bit is self-
1246 * clearing, and should clear within a microsecond.
1248 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1249 ctrl_data |= MASTER_CTRL_OOB_DIS;
1250 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1254 /* Wait at least 10ms for All module to be Idle */
1256 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1258 "MAC state machine can't be idle since"
1259 " disabled for 10ms second\n");
1262 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1264 /* driver control speed/duplex */
1265 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1266 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1268 /* clk switch setting */
1269 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1270 switch (hw->nic_type) {
1272 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1273 SERDES_MAC_CLK_SLOWDOWN);
1274 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1278 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1279 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1288 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1290 u16 ctrl_flags = hw->ctrl_flags;
1292 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1293 atl1c_set_aspm(hw, SPEED_0);
1294 hw->ctrl_flags = ctrl_flags;
1299 * Enable/disable L0s/L1 depend on link state.
1301 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1306 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1307 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1308 PM_CTRL_ASPM_L0S_EN |
1309 PM_CTRL_MAC_ASPM_CHK);
1311 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1312 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1314 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1315 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1316 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1317 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1319 link_l1_timer = hw->nic_type == athr_l2c_b ?
1320 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1321 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1323 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1324 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1328 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1329 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1330 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1331 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1333 /* l2cb & l1d & l2cb2 & l1d2 */
1334 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1335 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1336 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1337 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1338 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1339 PM_CTRL_SERDES_PD_EX_L1 |
1341 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1342 PM_CTRL_SERDES_PLL_L1_EN |
1343 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1346 /* disable l0s if link down or l2cb */
1347 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1348 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1351 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1352 if (link_speed != SPEED_0) {
1353 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1354 PM_CTRL_SERDES_PLL_L1_EN |
1355 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1356 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1357 PM_CTRL_CLK_SWH_L1 |
1358 PM_CTRL_ASPM_L0S_EN |
1359 PM_CTRL_ASPM_L1_EN);
1360 } else { /* link down */
1361 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1362 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1363 PM_CTRL_SERDES_PLL_L1_EN |
1364 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1365 PM_CTRL_ASPM_L0S_EN);
1368 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1374 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1375 * @adapter: board private structure
1377 * Configure the Tx /Rx unit of the MAC after a reset.
1379 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1381 struct atl1c_hw *hw = &adapter->hw;
1382 u32 master_ctrl_data = 0;
1383 u32 intr_modrt_data;
1386 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1387 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1388 MASTER_CTRL_RX_ITIMER_EN |
1389 MASTER_CTRL_INT_RDCLR);
1390 /* clear interrupt status */
1391 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1392 /* Clear any WOL status */
1393 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1394 /* set Interrupt Clear Timer
1395 * HW will enable self to assert interrupt event to system after
1396 * waiting x-time for software to notify it accept interrupt.
1399 data = CLK_GATING_EN_ALL;
1400 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1401 if (hw->nic_type == athr_l2c_b)
1402 data &= ~CLK_GATING_RXMAC_EN;
1405 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1407 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1408 hw->ict & INT_RETRIG_TIMER_MASK);
1410 atl1c_configure_des_ring(adapter);
1412 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1413 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1414 IRQ_MODRT_TX_TIMER_SHIFT;
1415 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1416 IRQ_MODRT_RX_TIMER_SHIFT;
1417 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1419 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1422 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1423 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1425 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1426 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1428 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1429 hw->smb_timer & SMB_STAT_TIMER_MASK);
1432 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1433 VLAN_HLEN + ETH_FCS_LEN);
1435 atl1c_configure_tx(adapter);
1436 atl1c_configure_rx(adapter);
1437 atl1c_configure_dma(adapter);
1442 static int atl1c_configure(struct atl1c_adapter *adapter)
1444 struct net_device *netdev = adapter->netdev;
1447 atl1c_init_ring_ptrs(adapter);
1448 atl1c_set_multi(netdev);
1449 atl1c_restore_vlan(adapter);
1451 num = atl1c_alloc_rx_buffer(adapter);
1452 if (unlikely(num == 0))
1455 if (atl1c_configure_mac(adapter))
1461 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1463 u16 hw_reg_addr = 0;
1464 unsigned long *stats_item = NULL;
1467 /* update rx status */
1468 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1469 stats_item = &adapter->hw_stats.rx_ok;
1470 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1471 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1472 *stats_item += data;
1476 /* update tx status */
1477 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1478 stats_item = &adapter->hw_stats.tx_ok;
1479 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1480 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1481 *stats_item += data;
1488 * atl1c_get_stats - Get System Network Statistics
1489 * @netdev: network interface device structure
1491 * Returns the address of the device statistics structure.
1492 * The statistics are actually updated from the timer callback.
1494 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1496 struct atl1c_adapter *adapter = netdev_priv(netdev);
1497 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1498 struct net_device_stats *net_stats = &netdev->stats;
1500 atl1c_update_hw_stats(adapter);
1501 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1502 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1503 net_stats->multicast = hw_stats->rx_mcast;
1504 net_stats->collisions = hw_stats->tx_1_col +
1505 hw_stats->tx_2_col +
1506 hw_stats->tx_late_col +
1507 hw_stats->tx_abort_col;
1509 net_stats->rx_errors = hw_stats->rx_frag +
1510 hw_stats->rx_fcs_err +
1511 hw_stats->rx_len_err +
1512 hw_stats->rx_sz_ov +
1513 hw_stats->rx_rrd_ov +
1514 hw_stats->rx_align_err +
1515 hw_stats->rx_rxf_ov;
1517 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1518 net_stats->rx_length_errors = hw_stats->rx_len_err;
1519 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1520 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1521 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1523 net_stats->tx_errors = hw_stats->tx_late_col +
1524 hw_stats->tx_abort_col +
1525 hw_stats->tx_underrun +
1528 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1529 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1530 net_stats->tx_window_errors = hw_stats->tx_late_col;
1532 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1533 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1538 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1542 spin_lock(&adapter->mdio_lock);
1543 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1544 spin_unlock(&adapter->mdio_lock);
1547 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1548 enum atl1c_trans_queue type)
1550 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1551 struct atl1c_buffer *buffer_info;
1552 struct pci_dev *pdev = adapter->pdev;
1553 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1554 u16 hw_next_to_clean;
1556 unsigned int total_bytes = 0, total_packets = 0;
1558 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1560 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1562 while (next_to_clean != hw_next_to_clean) {
1563 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1564 if (buffer_info->skb) {
1565 total_bytes += buffer_info->skb->len;
1568 atl1c_clean_buffer(pdev, buffer_info);
1569 if (++next_to_clean == tpd_ring->count)
1571 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1574 netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1576 if (netif_queue_stopped(adapter->netdev) &&
1577 netif_carrier_ok(adapter->netdev)) {
1578 netif_wake_queue(adapter->netdev);
1585 * atl1c_intr - Interrupt Handler
1586 * @irq: interrupt number
1587 * @data: pointer to a network interface device structure
1589 static irqreturn_t atl1c_intr(int irq, void *data)
1591 struct net_device *netdev = data;
1592 struct atl1c_adapter *adapter = netdev_priv(netdev);
1593 struct pci_dev *pdev = adapter->pdev;
1594 struct atl1c_hw *hw = &adapter->hw;
1595 int max_ints = AT_MAX_INT_WORK;
1596 int handled = IRQ_NONE;
1601 AT_READ_REG(hw, REG_ISR, ®_data);
1602 status = reg_data & hw->intr_mask;
1604 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1605 if (max_ints != AT_MAX_INT_WORK)
1606 handled = IRQ_HANDLED;
1610 if (status & ISR_GPHY)
1611 atl1c_clear_phy_int(adapter);
1613 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1614 if (status & ISR_RX_PKT) {
1615 if (likely(napi_schedule_prep(&adapter->napi))) {
1616 hw->intr_mask &= ~ISR_RX_PKT;
1617 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1618 __napi_schedule(&adapter->napi);
1621 if (status & ISR_TX_PKT)
1622 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1624 handled = IRQ_HANDLED;
1625 /* check if PCIE PHY Link down */
1626 if (status & ISR_ERROR) {
1627 if (netif_msg_hw(adapter))
1629 "atl1c hardware error (status = 0x%x)\n",
1630 status & ISR_ERROR);
1632 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1633 schedule_work(&adapter->common_task);
1637 if (status & ISR_OVER)
1638 if (netif_msg_intr(adapter))
1639 dev_warn(&pdev->dev,
1640 "TX/RX overflow (status = 0x%x)\n",
1644 if (status & (ISR_GPHY | ISR_MANUAL)) {
1645 netdev->stats.tx_carrier_errors++;
1646 atl1c_link_chg_event(adapter);
1650 } while (--max_ints > 0);
1651 /* re-enable Interrupt*/
1652 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1656 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1657 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1660 * The pid field in RRS in not correct sometimes, so we
1661 * cannot figure out if the packet is fragmented or not,
1662 * so we tell the KERNEL CHECKSUM_NONE
1664 skb_checksum_none_assert(skb);
1667 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1669 struct sk_buff *skb;
1672 if (adapter->rx_frag_size > PAGE_SIZE)
1673 return netdev_alloc_skb(adapter->netdev,
1674 adapter->rx_buffer_len);
1676 page = adapter->rx_page;
1678 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1679 if (unlikely(!page))
1681 adapter->rx_page_offset = 0;
1684 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1685 adapter->rx_frag_size);
1687 adapter->rx_page_offset += adapter->rx_frag_size;
1688 if (adapter->rx_page_offset >= PAGE_SIZE)
1689 adapter->rx_page = NULL;
1696 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1698 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1699 struct pci_dev *pdev = adapter->pdev;
1700 struct atl1c_buffer *buffer_info, *next_info;
1701 struct sk_buff *skb;
1702 void *vir_addr = NULL;
1704 u16 rfd_next_to_use, next_next;
1705 struct atl1c_rx_free_desc *rfd_desc;
1708 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1709 if (++next_next == rfd_ring->count)
1711 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1712 next_info = &rfd_ring->buffer_info[next_next];
1714 while (next_info->flags & ATL1C_BUFFER_FREE) {
1715 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1717 skb = atl1c_alloc_skb(adapter);
1718 if (unlikely(!skb)) {
1719 if (netif_msg_rx_err(adapter))
1720 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1725 * Make buffer alignment 2 beyond a 16 byte boundary
1726 * this will result in a 16 byte aligned IP header after
1727 * the 14 byte MAC header is removed
1729 vir_addr = skb->data;
1730 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1731 buffer_info->skb = skb;
1732 buffer_info->length = adapter->rx_buffer_len;
1733 mapping = pci_map_single(pdev, vir_addr,
1734 buffer_info->length,
1735 PCI_DMA_FROMDEVICE);
1736 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1738 buffer_info->skb = NULL;
1739 buffer_info->length = 0;
1740 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1741 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1744 buffer_info->dma = mapping;
1745 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1746 ATL1C_PCIMAP_FROMDEVICE);
1747 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1748 rfd_next_to_use = next_next;
1749 if (++next_next == rfd_ring->count)
1751 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1752 next_info = &rfd_ring->buffer_info[next_next];
1757 /* TODO: update mailbox here */
1759 rfd_ring->next_to_use = rfd_next_to_use;
1760 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1761 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1767 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1768 struct atl1c_recv_ret_status *rrs, u16 num)
1771 /* the relationship between rrd and rfd is one map one */
1772 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1773 rrd_ring->next_to_clean)) {
1774 rrs->word3 &= ~RRS_RXD_UPDATED;
1775 if (++rrd_ring->next_to_clean == rrd_ring->count)
1776 rrd_ring->next_to_clean = 0;
1780 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1781 struct atl1c_recv_ret_status *rrs, u16 num)
1785 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1787 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1788 RRS_RX_RFD_INDEX_MASK;
1789 for (i = 0; i < num; i++) {
1790 buffer_info[rfd_index].skb = NULL;
1791 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1793 if (++rfd_index == rfd_ring->count)
1796 rfd_ring->next_to_clean = rfd_index;
1799 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1800 int *work_done, int work_to_do)
1802 u16 rfd_num, rfd_index;
1805 struct pci_dev *pdev = adapter->pdev;
1806 struct net_device *netdev = adapter->netdev;
1807 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1808 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1809 struct sk_buff *skb;
1810 struct atl1c_recv_ret_status *rrs;
1811 struct atl1c_buffer *buffer_info;
1814 if (*work_done >= work_to_do)
1816 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1817 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1818 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1819 RRS_RX_RFD_CNT_MASK;
1820 if (unlikely(rfd_num != 1))
1821 /* TODO support mul rfd*/
1822 if (netif_msg_rx_err(adapter))
1823 dev_warn(&pdev->dev,
1824 "Multi rfd not support yet!\n");
1830 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1831 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1832 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1833 if (netif_msg_rx_err(adapter))
1834 dev_warn(&pdev->dev,
1835 "wrong packet! rrs word3 is %x\n",
1840 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1843 if (likely(rfd_num == 1)) {
1844 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1845 RRS_RX_RFD_INDEX_MASK;
1846 buffer_info = &rfd_ring->buffer_info[rfd_index];
1847 pci_unmap_single(pdev, buffer_info->dma,
1848 buffer_info->length, PCI_DMA_FROMDEVICE);
1849 skb = buffer_info->skb;
1852 if (netif_msg_rx_err(adapter))
1853 dev_warn(&pdev->dev,
1854 "Multi rfd not support yet!\n");
1857 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1858 skb_put(skb, length - ETH_FCS_LEN);
1859 skb->protocol = eth_type_trans(skb, netdev);
1860 atl1c_rx_checksum(adapter, skb, rrs);
1861 if (rrs->word3 & RRS_VLAN_INS) {
1864 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1865 vlan = le16_to_cpu(vlan);
1866 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1868 netif_receive_skb(skb);
1874 atl1c_alloc_rx_buffer(adapter);
1878 * atl1c_clean - NAPI Rx polling callback
1880 static int atl1c_clean(struct napi_struct *napi, int budget)
1882 struct atl1c_adapter *adapter =
1883 container_of(napi, struct atl1c_adapter, napi);
1886 /* Keep link state information with original netdev */
1887 if (!netif_carrier_ok(adapter->netdev))
1889 /* just enable one RXQ */
1890 atl1c_clean_rx_irq(adapter, &work_done, budget);
1892 if (work_done < budget) {
1894 napi_complete(napi);
1895 adapter->hw.intr_mask |= ISR_RX_PKT;
1896 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1901 #ifdef CONFIG_NET_POLL_CONTROLLER
1904 * Polling 'interrupt' - used by things like netconsole to send skbs
1905 * without having to re-enable interrupts. It's not called while
1906 * the interrupt routine is executing.
1908 static void atl1c_netpoll(struct net_device *netdev)
1910 struct atl1c_adapter *adapter = netdev_priv(netdev);
1912 disable_irq(adapter->pdev->irq);
1913 atl1c_intr(adapter->pdev->irq, netdev);
1914 enable_irq(adapter->pdev->irq);
1918 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1920 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1921 u16 next_to_use = 0;
1922 u16 next_to_clean = 0;
1924 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1925 next_to_use = tpd_ring->next_to_use;
1927 return (u16)(next_to_clean > next_to_use) ?
1928 (next_to_clean - next_to_use - 1) :
1929 (tpd_ring->count + next_to_clean - next_to_use - 1);
1933 * get next usable tpd
1934 * Note: should call atl1c_tdp_avail to make sure
1935 * there is enough tpd to use
1937 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1938 enum atl1c_trans_queue type)
1940 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1941 struct atl1c_tpd_desc *tpd_desc;
1942 u16 next_to_use = 0;
1944 next_to_use = tpd_ring->next_to_use;
1945 if (++tpd_ring->next_to_use == tpd_ring->count)
1946 tpd_ring->next_to_use = 0;
1947 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1948 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1952 static struct atl1c_buffer *
1953 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1955 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1957 return &tpd_ring->buffer_info[tpd -
1958 (struct atl1c_tpd_desc *)tpd_ring->desc];
1961 /* Calculate the transmit packet descript needed*/
1962 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1965 u16 proto_hdr_len = 0;
1967 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1969 if (skb_is_gso(skb)) {
1970 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1971 if (proto_hdr_len < skb_headlen(skb))
1973 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1979 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1980 struct sk_buff *skb,
1981 struct atl1c_tpd_desc **tpd,
1982 enum atl1c_trans_queue type)
1984 struct pci_dev *pdev = adapter->pdev;
1985 unsigned short offload_type;
1989 if (skb_is_gso(skb)) {
1992 err = skb_cow_head(skb, 0);
1996 offload_type = skb_shinfo(skb)->gso_type;
1998 if (offload_type & SKB_GSO_TCPV4) {
1999 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2000 + ntohs(ip_hdr(skb)->tot_len));
2002 if (real_len < skb->len)
2003 pskb_trim(skb, real_len);
2005 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2006 if (unlikely(skb->len == hdr_len)) {
2007 /* only xsum need */
2008 if (netif_msg_tx_queued(adapter))
2009 dev_warn(&pdev->dev,
2010 "IPV4 tso with zero data??\n");
2013 ip_hdr(skb)->check = 0;
2014 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2018 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2022 if (offload_type & SKB_GSO_TCPV6) {
2023 struct atl1c_tpd_ext_desc *etpd =
2024 *(struct atl1c_tpd_ext_desc **)(tpd);
2026 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2027 *tpd = atl1c_get_tpd(adapter, type);
2028 ipv6_hdr(skb)->payload_len = 0;
2029 /* check payload == 0 byte ? */
2030 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2031 if (unlikely(skb->len == hdr_len)) {
2032 /* only xsum need */
2033 if (netif_msg_tx_queued(adapter))
2034 dev_warn(&pdev->dev,
2035 "IPV6 tso with zero data??\n");
2038 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2039 &ipv6_hdr(skb)->saddr,
2040 &ipv6_hdr(skb)->daddr,
2042 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2043 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2044 etpd->pkt_len = cpu_to_le32(skb->len);
2045 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2048 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2049 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2050 TPD_TCPHDR_OFFSET_SHIFT;
2051 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2057 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2059 cso = skb_checksum_start_offset(skb);
2061 if (unlikely(cso & 0x1)) {
2062 if (netif_msg_tx_err(adapter))
2063 dev_err(&adapter->pdev->dev,
2064 "payload offset should not an event number\n");
2067 css = cso + skb->csum_offset;
2069 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2070 TPD_PLOADOFFSET_SHIFT;
2071 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2072 TPD_CCSUM_OFFSET_SHIFT;
2073 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2079 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2080 struct atl1c_tpd_desc *first_tpd,
2081 enum atl1c_trans_queue type)
2083 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2084 struct atl1c_buffer *buffer_info;
2085 struct atl1c_tpd_desc *tpd;
2086 u16 first_index, index;
2088 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2089 index = first_index;
2090 while (index != tpd_ring->next_to_use) {
2091 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2092 buffer_info = &tpd_ring->buffer_info[index];
2093 atl1c_clean_buffer(adpt->pdev, buffer_info);
2094 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2095 if (++index == tpd_ring->count)
2098 tpd_ring->next_to_use = first_index;
2101 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2102 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2103 enum atl1c_trans_queue type)
2105 struct atl1c_tpd_desc *use_tpd = NULL;
2106 struct atl1c_buffer *buffer_info = NULL;
2107 u16 buf_len = skb_headlen(skb);
2115 nr_frags = skb_shinfo(skb)->nr_frags;
2116 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2119 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2122 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2123 buffer_info->length = map_len;
2124 buffer_info->dma = pci_map_single(adapter->pdev,
2125 skb->data, hdr_len, PCI_DMA_TODEVICE);
2126 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2129 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2130 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2131 ATL1C_PCIMAP_TODEVICE);
2132 mapped_len += map_len;
2133 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2134 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2137 if (mapped_len < buf_len) {
2138 /* mapped_len == 0, means we should use the first tpd,
2139 which is given by caller */
2140 if (mapped_len == 0)
2143 use_tpd = atl1c_get_tpd(adapter, type);
2144 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2146 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2147 buffer_info->length = buf_len - mapped_len;
2149 pci_map_single(adapter->pdev, skb->data + mapped_len,
2150 buffer_info->length, PCI_DMA_TODEVICE);
2151 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2155 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2156 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2157 ATL1C_PCIMAP_TODEVICE);
2158 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2159 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2162 for (f = 0; f < nr_frags; f++) {
2163 struct skb_frag_struct *frag;
2165 frag = &skb_shinfo(skb)->frags[f];
2167 use_tpd = atl1c_get_tpd(adapter, type);
2168 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2170 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2171 buffer_info->length = skb_frag_size(frag);
2172 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2174 buffer_info->length,
2176 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2179 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2180 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2181 ATL1C_PCIMAP_TODEVICE);
2182 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2183 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2187 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2188 /* The last buffer info contain the skb address,
2189 so it will be free after unmap */
2190 buffer_info->skb = skb;
2195 buffer_info->dma = 0;
2196 buffer_info->length = 0;
2200 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2201 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2203 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2206 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2207 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2210 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2211 struct net_device *netdev)
2213 struct atl1c_adapter *adapter = netdev_priv(netdev);
2214 unsigned long flags;
2216 struct atl1c_tpd_desc *tpd;
2217 enum atl1c_trans_queue type = atl1c_trans_normal;
2219 if (test_bit(__AT_DOWN, &adapter->flags)) {
2220 dev_kfree_skb_any(skb);
2221 return NETDEV_TX_OK;
2224 tpd_req = atl1c_cal_tpd_req(skb);
2225 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2226 if (netif_msg_pktdata(adapter))
2227 dev_info(&adapter->pdev->dev, "tx locked\n");
2228 return NETDEV_TX_LOCKED;
2231 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2232 /* no enough descriptor, just stop queue */
2233 netif_stop_queue(netdev);
2234 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2235 return NETDEV_TX_BUSY;
2238 tpd = atl1c_get_tpd(adapter, type);
2240 /* do TSO and check sum */
2241 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2242 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2243 dev_kfree_skb_any(skb);
2244 return NETDEV_TX_OK;
2247 if (unlikely(skb_vlan_tag_present(skb))) {
2248 u16 vlan = skb_vlan_tag_get(skb);
2251 vlan = cpu_to_le16(vlan);
2252 AT_VLAN_TO_TAG(vlan, tag);
2253 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2254 tpd->vlan_tag = tag;
2257 if (skb_network_offset(skb) != ETH_HLEN)
2258 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2260 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2261 netif_info(adapter, tx_done, adapter->netdev,
2262 "tx-skb droppted due to dma error\n");
2263 /* roll back tpd/buffer */
2264 atl1c_tx_rollback(adapter, tpd, type);
2265 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2266 dev_kfree_skb_any(skb);
2268 netdev_sent_queue(adapter->netdev, skb->len);
2269 atl1c_tx_queue(adapter, skb, tpd, type);
2270 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2273 return NETDEV_TX_OK;
2276 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2278 struct net_device *netdev = adapter->netdev;
2280 free_irq(adapter->pdev->irq, netdev);
2282 if (adapter->have_msi)
2283 pci_disable_msi(adapter->pdev);
2286 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2288 struct pci_dev *pdev = adapter->pdev;
2289 struct net_device *netdev = adapter->netdev;
2293 adapter->have_msi = true;
2294 err = pci_enable_msi(adapter->pdev);
2296 if (netif_msg_ifup(adapter))
2298 "Unable to allocate MSI interrupt Error: %d\n",
2300 adapter->have_msi = false;
2303 if (!adapter->have_msi)
2304 flags |= IRQF_SHARED;
2305 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2306 netdev->name, netdev);
2308 if (netif_msg_ifup(adapter))
2310 "Unable to allocate interrupt Error: %d\n",
2312 if (adapter->have_msi)
2313 pci_disable_msi(adapter->pdev);
2316 if (netif_msg_ifup(adapter))
2317 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2322 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2324 /* release tx-pending skbs and reset tx/rx ring index */
2325 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2326 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2327 atl1c_clean_rx_ring(adapter);
2330 static int atl1c_up(struct atl1c_adapter *adapter)
2332 struct net_device *netdev = adapter->netdev;
2335 netif_carrier_off(netdev);
2337 err = atl1c_configure(adapter);
2341 err = atl1c_request_irq(adapter);
2345 atl1c_check_link_status(adapter);
2346 clear_bit(__AT_DOWN, &adapter->flags);
2347 napi_enable(&adapter->napi);
2348 atl1c_irq_enable(adapter);
2349 netif_start_queue(netdev);
2353 atl1c_clean_rx_ring(adapter);
2357 static void atl1c_down(struct atl1c_adapter *adapter)
2359 struct net_device *netdev = adapter->netdev;
2361 atl1c_del_timer(adapter);
2362 adapter->work_event = 0; /* clear all event */
2363 /* signal that we're down so the interrupt handler does not
2364 * reschedule our watchdog timer */
2365 set_bit(__AT_DOWN, &adapter->flags);
2366 netif_carrier_off(netdev);
2367 napi_disable(&adapter->napi);
2368 atl1c_irq_disable(adapter);
2369 atl1c_free_irq(adapter);
2370 /* disable ASPM if device inactive */
2371 atl1c_disable_l0s_l1(&adapter->hw);
2372 /* reset MAC to disable all RX/TX */
2373 atl1c_reset_mac(&adapter->hw);
2376 adapter->link_speed = SPEED_0;
2377 adapter->link_duplex = -1;
2378 atl1c_reset_dma_ring(adapter);
2382 * atl1c_open - Called when a network interface is made active
2383 * @netdev: network interface device structure
2385 * Returns 0 on success, negative value on failure
2387 * The open entry point is called when a network interface is made
2388 * active by the system (IFF_UP). At this point all resources needed
2389 * for transmit and receive operations are allocated, the interrupt
2390 * handler is registered with the OS, the watchdog timer is started,
2391 * and the stack is notified that the interface is ready.
2393 static int atl1c_open(struct net_device *netdev)
2395 struct atl1c_adapter *adapter = netdev_priv(netdev);
2398 /* disallow open during test */
2399 if (test_bit(__AT_TESTING, &adapter->flags))
2402 /* allocate rx/tx dma buffer & descriptors */
2403 err = atl1c_setup_ring_resources(adapter);
2407 err = atl1c_up(adapter);
2414 atl1c_free_irq(adapter);
2415 atl1c_free_ring_resources(adapter);
2416 atl1c_reset_mac(&adapter->hw);
2421 * atl1c_close - Disables a network interface
2422 * @netdev: network interface device structure
2424 * Returns 0, this is not allowed to fail
2426 * The close entry point is called when an interface is de-activated
2427 * by the OS. The hardware is still under the drivers control, but
2428 * needs to be disabled. A global MAC reset is issued to stop the
2429 * hardware, and all transmit and receive resources are freed.
2431 static int atl1c_close(struct net_device *netdev)
2433 struct atl1c_adapter *adapter = netdev_priv(netdev);
2435 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2436 set_bit(__AT_DOWN, &adapter->flags);
2437 cancel_work_sync(&adapter->common_task);
2438 atl1c_down(adapter);
2439 atl1c_free_ring_resources(adapter);
2443 static int atl1c_suspend(struct device *dev)
2445 struct pci_dev *pdev = to_pci_dev(dev);
2446 struct net_device *netdev = pci_get_drvdata(pdev);
2447 struct atl1c_adapter *adapter = netdev_priv(netdev);
2448 struct atl1c_hw *hw = &adapter->hw;
2449 u32 wufc = adapter->wol;
2451 atl1c_disable_l0s_l1(hw);
2452 if (netif_running(netdev)) {
2453 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2454 atl1c_down(adapter);
2456 netif_device_detach(netdev);
2459 if (atl1c_phy_to_ps_link(hw) != 0)
2460 dev_dbg(&pdev->dev, "phy power saving failed");
2462 atl1c_power_saving(hw, wufc);
2467 #ifdef CONFIG_PM_SLEEP
2468 static int atl1c_resume(struct device *dev)
2470 struct pci_dev *pdev = to_pci_dev(dev);
2471 struct net_device *netdev = pci_get_drvdata(pdev);
2472 struct atl1c_adapter *adapter = netdev_priv(netdev);
2474 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2475 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2477 atl1c_phy_reset(&adapter->hw);
2478 atl1c_reset_mac(&adapter->hw);
2479 atl1c_phy_init(&adapter->hw);
2482 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2483 pm_data &= ~PM_CTRLSTAT_PME_EN;
2484 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2487 netif_device_attach(netdev);
2488 if (netif_running(netdev))
2495 static void atl1c_shutdown(struct pci_dev *pdev)
2497 struct net_device *netdev = pci_get_drvdata(pdev);
2498 struct atl1c_adapter *adapter = netdev_priv(netdev);
2500 atl1c_suspend(&pdev->dev);
2501 pci_wake_from_d3(pdev, adapter->wol);
2502 pci_set_power_state(pdev, PCI_D3hot);
2505 static const struct net_device_ops atl1c_netdev_ops = {
2506 .ndo_open = atl1c_open,
2507 .ndo_stop = atl1c_close,
2508 .ndo_validate_addr = eth_validate_addr,
2509 .ndo_start_xmit = atl1c_xmit_frame,
2510 .ndo_set_mac_address = atl1c_set_mac_addr,
2511 .ndo_set_rx_mode = atl1c_set_multi,
2512 .ndo_change_mtu = atl1c_change_mtu,
2513 .ndo_fix_features = atl1c_fix_features,
2514 .ndo_set_features = atl1c_set_features,
2515 .ndo_do_ioctl = atl1c_ioctl,
2516 .ndo_tx_timeout = atl1c_tx_timeout,
2517 .ndo_get_stats = atl1c_get_stats,
2518 #ifdef CONFIG_NET_POLL_CONTROLLER
2519 .ndo_poll_controller = atl1c_netpoll,
2523 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2525 SET_NETDEV_DEV(netdev, &pdev->dev);
2526 pci_set_drvdata(pdev, netdev);
2528 netdev->netdev_ops = &atl1c_netdev_ops;
2529 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2530 atl1c_set_ethtool_ops(netdev);
2532 /* TODO: add when ready */
2533 netdev->hw_features = NETIF_F_SG |
2535 NETIF_F_HW_VLAN_CTAG_RX |
2538 netdev->features = netdev->hw_features |
2539 NETIF_F_HW_VLAN_CTAG_TX;
2544 * atl1c_probe - Device Initialization Routine
2545 * @pdev: PCI device information struct
2546 * @ent: entry in atl1c_pci_tbl
2548 * Returns 0 on success, negative on failure
2550 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2551 * The OS initialization, configuring of the adapter private structure,
2552 * and a hardware reset occur.
2554 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2556 struct net_device *netdev;
2557 struct atl1c_adapter *adapter;
2558 static int cards_found;
2562 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2563 err = pci_enable_device_mem(pdev);
2565 dev_err(&pdev->dev, "cannot enable PCI device\n");
2570 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2571 * shared register for the high 32 bits, so only a single, aligned,
2572 * 4 GB physical address range can be used at a time.
2574 * Supporting 64-bit DMA on this hardware is more trouble than it's
2575 * worth. It is far easier to limit to 32-bit DMA than update
2576 * various kernel subsystems to support the mechanics required by a
2577 * fixed-high-32-bit system.
2579 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2580 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2581 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2585 err = pci_request_regions(pdev, atl1c_driver_name);
2587 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2591 pci_set_master(pdev);
2593 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2594 if (netdev == NULL) {
2596 goto err_alloc_etherdev;
2599 err = atl1c_init_netdev(netdev, pdev);
2601 dev_err(&pdev->dev, "init netdevice failed\n");
2602 goto err_init_netdev;
2604 adapter = netdev_priv(netdev);
2605 adapter->bd_number = cards_found;
2606 adapter->netdev = netdev;
2607 adapter->pdev = pdev;
2608 adapter->hw.adapter = adapter;
2609 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2610 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2611 if (!adapter->hw.hw_addr) {
2613 dev_err(&pdev->dev, "cannot map device registers\n");
2618 adapter->mii.dev = netdev;
2619 adapter->mii.mdio_read = atl1c_mdio_read;
2620 adapter->mii.mdio_write = atl1c_mdio_write;
2621 adapter->mii.phy_id_mask = 0x1f;
2622 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2623 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2624 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2625 (unsigned long)adapter);
2626 /* setup the private structure */
2627 err = atl1c_sw_init(adapter);
2629 dev_err(&pdev->dev, "net device private data init failed\n");
2632 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2634 /* Init GPHY as early as possible due to power saving issue */
2635 atl1c_phy_reset(&adapter->hw);
2637 err = atl1c_reset_mac(&adapter->hw);
2643 /* reset the controller to
2644 * put the device in a known good starting state */
2645 err = atl1c_phy_init(&adapter->hw);
2650 if (atl1c_read_mac_addr(&adapter->hw)) {
2651 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2652 netdev->addr_assign_type = NET_ADDR_RANDOM;
2654 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2655 if (netif_msg_probe(adapter))
2656 dev_dbg(&pdev->dev, "mac address : %pM\n",
2657 adapter->hw.mac_addr);
2659 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2660 INIT_WORK(&adapter->common_task, atl1c_common_task);
2661 adapter->work_event = 0;
2662 err = register_netdev(netdev);
2664 dev_err(&pdev->dev, "register netdevice failed\n");
2668 if (netif_msg_probe(adapter))
2669 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2676 iounmap(adapter->hw.hw_addr);
2679 free_netdev(netdev);
2681 pci_release_regions(pdev);
2684 pci_disable_device(pdev);
2689 * atl1c_remove - Device Removal Routine
2690 * @pdev: PCI device information struct
2692 * atl1c_remove is called by the PCI subsystem to alert the driver
2693 * that it should release a PCI device. The could be caused by a
2694 * Hot-Plug event, or because the driver is going to be removed from
2697 static void atl1c_remove(struct pci_dev *pdev)
2699 struct net_device *netdev = pci_get_drvdata(pdev);
2700 struct atl1c_adapter *adapter = netdev_priv(netdev);
2702 unregister_netdev(netdev);
2703 /* restore permanent address */
2704 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2705 atl1c_phy_disable(&adapter->hw);
2707 iounmap(adapter->hw.hw_addr);
2709 pci_release_regions(pdev);
2710 pci_disable_device(pdev);
2711 free_netdev(netdev);
2715 * atl1c_io_error_detected - called when PCI error is detected
2716 * @pdev: Pointer to PCI device
2717 * @state: The current pci connection state
2719 * This function is called after a PCI bus error affecting
2720 * this device has been detected.
2722 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2723 pci_channel_state_t state)
2725 struct net_device *netdev = pci_get_drvdata(pdev);
2726 struct atl1c_adapter *adapter = netdev_priv(netdev);
2728 netif_device_detach(netdev);
2730 if (state == pci_channel_io_perm_failure)
2731 return PCI_ERS_RESULT_DISCONNECT;
2733 if (netif_running(netdev))
2734 atl1c_down(adapter);
2736 pci_disable_device(pdev);
2738 /* Request a slot slot reset. */
2739 return PCI_ERS_RESULT_NEED_RESET;
2743 * atl1c_io_slot_reset - called after the pci bus has been reset.
2744 * @pdev: Pointer to PCI device
2746 * Restart the card from scratch, as if from a cold-boot. Implementation
2747 * resembles the first-half of the e1000_resume routine.
2749 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2751 struct net_device *netdev = pci_get_drvdata(pdev);
2752 struct atl1c_adapter *adapter = netdev_priv(netdev);
2754 if (pci_enable_device(pdev)) {
2755 if (netif_msg_hw(adapter))
2757 "Cannot re-enable PCI device after reset\n");
2758 return PCI_ERS_RESULT_DISCONNECT;
2760 pci_set_master(pdev);
2762 pci_enable_wake(pdev, PCI_D3hot, 0);
2763 pci_enable_wake(pdev, PCI_D3cold, 0);
2765 atl1c_reset_mac(&adapter->hw);
2767 return PCI_ERS_RESULT_RECOVERED;
2771 * atl1c_io_resume - called when traffic can start flowing again.
2772 * @pdev: Pointer to PCI device
2774 * This callback is called when the error recovery driver tells us that
2775 * its OK to resume normal operation. Implementation resembles the
2776 * second-half of the atl1c_resume routine.
2778 static void atl1c_io_resume(struct pci_dev *pdev)
2780 struct net_device *netdev = pci_get_drvdata(pdev);
2781 struct atl1c_adapter *adapter = netdev_priv(netdev);
2783 if (netif_running(netdev)) {
2784 if (atl1c_up(adapter)) {
2785 if (netif_msg_hw(adapter))
2787 "Cannot bring device back up after reset\n");
2792 netif_device_attach(netdev);
2795 static const struct pci_error_handlers atl1c_err_handler = {
2796 .error_detected = atl1c_io_error_detected,
2797 .slot_reset = atl1c_io_slot_reset,
2798 .resume = atl1c_io_resume,
2801 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2803 static struct pci_driver atl1c_driver = {
2804 .name = atl1c_driver_name,
2805 .id_table = atl1c_pci_tbl,
2806 .probe = atl1c_probe,
2807 .remove = atl1c_remove,
2808 .shutdown = atl1c_shutdown,
2809 .err_handler = &atl1c_err_handler,
2810 .driver.pm = &atl1c_pm_ops,
2813 module_pci_driver(atl1c_driver);