1/*
2 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
3 *
4 * Derived from Intel e1000 driver
5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 *
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)
10 * any later version.
11 *
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
15 * more details.
16 *
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.
20 */
21
22#include "atl1c.h"
23
24#define ATL1C_DRV_VERSION "1.0.1.1-NAPI"
25char atl1c_driver_name[] = "atl1c";
26char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27
28/*
29 * atl1c_pci_tbl - PCI Device ID Table
30 *
31 * Wildcard entries (PCI_ANY_ID) should come last
32 * Last entry must be all 0s
33 *
34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
35 *   Class, Class Mask, private data (not used) }
36 */
37static 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 */
45	{ 0 }
46};
47MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
48
49MODULE_AUTHOR("Jie Yang");
50MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
51MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
52MODULE_LICENSE("GPL");
53MODULE_VERSION(ATL1C_DRV_VERSION);
54
55static int atl1c_stop_mac(struct atl1c_hw *hw);
56static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
57static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
58static void atl1c_start_mac(struct atl1c_adapter *adapter);
59static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
60		   int *work_done, int work_to_do);
61static int atl1c_up(struct atl1c_adapter *adapter);
62static void atl1c_down(struct atl1c_adapter *adapter);
63static int atl1c_reset_mac(struct atl1c_hw *hw);
64static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
65static int atl1c_configure(struct atl1c_adapter *adapter);
66static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
67
68static const u16 atl1c_pay_load_size[] = {
69	128, 256, 512, 1024, 2048, 4096,
70};
71
72
73static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
74	NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
75static void atl1c_pcie_patch(struct atl1c_hw *hw)
76{
77	u32 mst_data, data;
78
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);
83
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);
93	}
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);
106	}
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);
115	}
116}
117
118/* FIXME: no need any more ? */
119/*
120 * atl1c_init_pcie - init PCIE module
121 */
122static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
123{
124	u32 data;
125	u32 pci_cmd;
126	struct pci_dev *pdev = hw->adapter->pdev;
127	int pos;
128
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 |
132		PCI_COMMAND_IO);
133	AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
134
135	/*
136	 * Clear any PowerSaveing Settings
137	 */
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);
143
144	/*
145	 * Mask some pcie error bits
146	 */
147	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
148	if (pos) {
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);
152	}
153	/* clear error status */
154	pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
155			PCI_EXP_DEVSTA_NFED |
156			PCI_EXP_DEVSTA_FED |
157			PCI_EXP_DEVSTA_CED |
158			PCI_EXP_DEVSTA_URD);
159
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);
163
164	atl1c_pcie_patch(hw);
165	if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
166		atl1c_disable_l0s_l1(hw);
167
168	msleep(5);
169}
170
171/**
172 * atl1c_irq_enable - Enable default interrupt generation settings
173 * @adapter: board private structure
174 */
175static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
176{
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);
181	}
182}
183
184/**
185 * atl1c_irq_disable - Mask off interrupt generation on the NIC
186 * @adapter: board private structure
187 */
188static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
189{
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);
195}
196
197/**
198 * atl1c_irq_reset - reset interrupt confiure on the NIC
199 * @adapter: board private structure
200 */
201static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
202{
203	atomic_set(&adapter->irq_sem, 1);
204	atl1c_irq_enable(adapter);
205}
206
207/*
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
210 */
211static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
212{
213	int timeout;
214	u32 data;
215
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)
219			return 0;
220		msleep(1);
221	}
222	return data;
223}
224
225/**
226 * atl1c_phy_config - Timer Call-back
227 * @data: pointer to netdev cast into an unsigned long
228 */
229static void atl1c_phy_config(unsigned long data)
230{
231	struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
232	struct atl1c_hw *hw = &adapter->hw;
233	unsigned long flags;
234
235	spin_lock_irqsave(&adapter->mdio_lock, flags);
236	atl1c_restart_autoneg(hw);
237	spin_unlock_irqrestore(&adapter->mdio_lock, flags);
238}
239
240void atl1c_reinit_locked(struct atl1c_adapter *adapter)
241{
242	WARN_ON(in_interrupt());
243	atl1c_down(adapter);
244	atl1c_up(adapter);
245	clear_bit(__AT_RESETTING, &adapter->flags);
246}
247
248static void atl1c_check_link_status(struct atl1c_adapter *adapter)
249{
250	struct atl1c_hw *hw = &adapter->hw;
251	struct net_device *netdev = adapter->netdev;
252	struct pci_dev    *pdev   = adapter->pdev;
253	int err;
254	unsigned long flags;
255	u16 speed, duplex, phy_data;
256
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);
262
263	if ((phy_data & BMSR_LSTATUS) == 0) {
264		/* link down */
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);
274	} else {
275		/* Link Up */
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);
280		if (unlikely(err))
281			return;
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))
291				dev_info(&pdev->dev,
292					"%s: %s NIC Link is Up<%d Mbps %s>\n",
293					atl1c_driver_name, netdev->name,
294					adapter->link_speed,
295					adapter->link_duplex == FULL_DUPLEX ?
296					"Full Duplex" : "Half Duplex");
297		}
298		if (!netif_carrier_ok(netdev))
299			netif_carrier_on(netdev);
300	}
301}
302
303static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
304{
305	struct net_device *netdev = adapter->netdev;
306	struct pci_dev    *pdev   = adapter->pdev;
307	u16 phy_data;
308	u16 link_up;
309
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 */
316	if (!link_up) {
317		if (netif_carrier_ok(netdev)) {
318			/* old link state: Up */
319			netif_carrier_off(netdev);
320			if (netif_msg_link(adapter))
321				dev_info(&pdev->dev,
322					"%s: %s NIC Link is Down\n",
323					atl1c_driver_name, netdev->name);
324			adapter->link_speed = SPEED_0;
325		}
326	}
327
328	set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
329	schedule_work(&adapter->common_task);
330}
331
332static void atl1c_common_task(struct work_struct *work)
333{
334	struct atl1c_adapter *adapter;
335	struct net_device *netdev;
336
337	adapter = container_of(work, struct atl1c_adapter, common_task);
338	netdev = adapter->netdev;
339
340	if (test_bit(__AT_DOWN, &adapter->flags))
341		return;
342
343	if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
344		netif_device_detach(netdev);
345		atl1c_down(adapter);
346		atl1c_up(adapter);
347		netif_device_attach(netdev);
348	}
349
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);
355	}
356}
357
358
359static void atl1c_del_timer(struct atl1c_adapter *adapter)
360{
361	del_timer_sync(&adapter->phy_config_timer);
362}
363
364
365/**
366 * atl1c_tx_timeout - Respond to a Tx Hang
367 * @netdev: network interface device structure
368 */
369static void atl1c_tx_timeout(struct net_device *netdev)
370{
371	struct atl1c_adapter *adapter = netdev_priv(netdev);
372
373	/* Do the reset outside of interrupt context */
374	set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
375	schedule_work(&adapter->common_task);
376}
377
378/**
379 * atl1c_set_multi - Multicast and Promiscuous mode set
380 * @netdev: network interface device structure
381 *
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.
386 */
387static void atl1c_set_multi(struct net_device *netdev)
388{
389	struct atl1c_adapter *adapter = netdev_priv(netdev);
390	struct atl1c_hw *hw = &adapter->hw;
391	struct netdev_hw_addr *ha;
392	u32 mac_ctrl_data;
393	u32 hash_value;
394
395	/* Check for Promiscuous and All Multicast modes */
396	AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
397
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;
403	} else {
404		mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
405	}
406
407	AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
408
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);
412
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);
417	}
418}
419
420static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
421{
422	if (features & NETIF_F_HW_VLAN_CTAG_RX) {
423		/* enable VLAN tag insert/strip */
424		*mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
425	} else {
426		/* disable VLAN tag insert/strip */
427		*mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
428	}
429}
430
431static void atl1c_vlan_mode(struct net_device *netdev,
432	netdev_features_t features)
433{
434	struct atl1c_adapter *adapter = netdev_priv(netdev);
435	struct pci_dev *pdev = adapter->pdev;
436	u32 mac_ctrl_data = 0;
437
438	if (netif_msg_pktdata(adapter))
439		dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
440
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);
446}
447
448static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
449{
450	struct pci_dev *pdev = adapter->pdev;
451
452	if (netif_msg_pktdata(adapter))
453		dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
454	atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
455}
456
457/**
458 * atl1c_set_mac - Change the Ethernet Address of the NIC
459 * @netdev: network interface device structure
460 * @p: pointer to an address structure
461 *
462 * Returns 0 on success, negative on failure
463 */
464static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
465{
466	struct atl1c_adapter *adapter = netdev_priv(netdev);
467	struct sockaddr *addr = p;
468
469	if (!is_valid_ether_addr(addr->sa_data))
470		return -EADDRNOTAVAIL;
471
472	if (netif_running(netdev))
473		return -EBUSY;
474
475	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
476	memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
477
478	atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
479
480	return 0;
481}
482
483static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
484				struct net_device *dev)
485{
486	unsigned int head_size;
487	int mtu = dev->mtu;
488
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;
491
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);
495}
496
497static netdev_features_t atl1c_fix_features(struct net_device *netdev,
498	netdev_features_t features)
499{
500	/*
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.
503	 */
504	if (features & NETIF_F_HW_VLAN_CTAG_RX)
505		features |= NETIF_F_HW_VLAN_CTAG_TX;
506	else
507		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
508
509	if (netdev->mtu > MAX_TSO_FRAME_SIZE)
510		features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
511
512	return features;
513}
514
515static int atl1c_set_features(struct net_device *netdev,
516	netdev_features_t features)
517{
518	netdev_features_t changed = netdev->features ^ features;
519
520	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
521		atl1c_vlan_mode(netdev, features);
522
523	return 0;
524}
525
526/**
527 * atl1c_change_mtu - Change the Maximum Transfer Unit
528 * @netdev: network interface device structure
529 * @new_mtu: new value for maximum frame size
530 *
531 * Returns 0 on success, negative on failure
532 */
533static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
534{
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;
539
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");
548		return -EINVAL;
549	}
550	/* set MTU */
551	if (old_mtu != new_mtu && netif_running(netdev)) {
552		while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
553			msleep(1);
554		netdev->mtu = new_mtu;
555		adapter->hw.max_frame_size = new_mtu;
556		atl1c_set_rxbufsize(adapter, netdev);
557		atl1c_down(adapter);
558		netdev_update_features(netdev);
559		atl1c_up(adapter);
560		clear_bit(__AT_RESETTING, &adapter->flags);
561	}
562	return 0;
563}
564
565/*
566 *  caller should hold mdio_lock
567 */
568static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
569{
570	struct atl1c_adapter *adapter = netdev_priv(netdev);
571	u16 result;
572
573	atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
574	return result;
575}
576
577static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
578			     int reg_num, int val)
579{
580	struct atl1c_adapter *adapter = netdev_priv(netdev);
581
582	atl1c_write_phy_reg(&adapter->hw, reg_num, val);
583}
584
585static int atl1c_mii_ioctl(struct net_device *netdev,
586			   struct ifreq *ifr, int cmd)
587{
588	struct atl1c_adapter *adapter = netdev_priv(netdev);
589	struct pci_dev *pdev = adapter->pdev;
590	struct mii_ioctl_data *data = if_mii(ifr);
591	unsigned long flags;
592	int retval = 0;
593
594	if (!netif_running(netdev))
595		return -EINVAL;
596
597	spin_lock_irqsave(&adapter->mdio_lock, flags);
598	switch (cmd) {
599	case SIOCGMIIPHY:
600		data->phy_id = 0;
601		break;
602
603	case SIOCGMIIREG:
604		if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
605				    &data->val_out)) {
606			retval = -EIO;
607			goto out;
608		}
609		break;
610
611	case SIOCSMIIREG:
612		if (data->reg_num & ~(0x1F)) {
613			retval = -EFAULT;
614			goto out;
615		}
616
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)) {
621			retval = -EIO;
622			goto out;
623		}
624		break;
625
626	default:
627		retval = -EOPNOTSUPP;
628		break;
629	}
630out:
631	spin_unlock_irqrestore(&adapter->mdio_lock, flags);
632	return retval;
633}
634
635static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
636{
637	switch (cmd) {
638	case SIOCGMIIPHY:
639	case SIOCGMIIREG:
640	case SIOCSMIIREG:
641		return atl1c_mii_ioctl(netdev, ifr, cmd);
642	default:
643		return -EOPNOTSUPP;
644	}
645}
646
647/**
648 * atl1c_alloc_queues - Allocate memory for all rings
649 * @adapter: board private structure to initialize
650 *
651 */
652static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
653{
654	return 0;
655}
656
657static void atl1c_set_mac_type(struct atl1c_hw *hw)
658{
659	switch (hw->device_id) {
660	case PCI_DEVICE_ID_ATTANSIC_L2C:
661		hw->nic_type = athr_l2c;
662		break;
663	case PCI_DEVICE_ID_ATTANSIC_L1C:
664		hw->nic_type = athr_l1c;
665		break;
666	case PCI_DEVICE_ID_ATHEROS_L2C_B:
667		hw->nic_type = athr_l2c_b;
668		break;
669	case PCI_DEVICE_ID_ATHEROS_L2C_B2:
670		hw->nic_type = athr_l2c_b2;
671		break;
672	case PCI_DEVICE_ID_ATHEROS_L1D:
673		hw->nic_type = athr_l1d;
674		break;
675	case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
676		hw->nic_type = athr_l1d_2;
677		break;
678	default:
679		break;
680	}
681}
682
683static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
684{
685	u32 link_ctrl_data;
686
687	atl1c_set_mac_type(hw);
688	AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
689
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;
695
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;
700	return 0;
701}
702
703struct atl1c_platform_patch {
704	u16 pci_did;
705	u8  pci_revid;
706	u16 subsystem_vid;
707	u16 subsystem_did;
708	u32 patch_flag;
709#define ATL1C_LINK_PATCH	0x1
710};
711static 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},
731{0},
732};
733
734static void atl1c_patch_assign(struct atl1c_hw *hw)
735{
736	struct pci_dev	*pdev = hw->adapter->pdev;
737	u32 misc_ctrl;
738	int i = 0;
739
740	hw->msi_lnkpatch = false;
741
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;
749		}
750		i++;
751	}
752
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);
759		misc_ctrl &= ~0x100;
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);
763	}
764}
765/**
766 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
767 * @adapter: board private structure to initialize
768 *
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).
772 */
773static int atl1c_sw_init(struct atl1c_adapter *adapter)
774{
775	struct atl1c_hw *hw   = &adapter->hw;
776	struct pci_dev	*pdev = adapter->pdev;
777	u32 revision;
778
779
780	adapter->wol = 0;
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;
786
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");
798		return -1;
799	}
800	atl1c_patch_assign(hw);
801
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;
808	hw->base_cpu = 0;
809
810	hw->ict = 50000;		/* 100ms */
811	hw->smb_timer = 200000;	  	/* 400ms */
812	hw->rx_imt = 200;
813	hw->tx_imt = 1000;
814
815	hw->tpd_burst = 5;
816	hw->rfd_burst = 8;
817	hw->dma_order = atl1c_dma_ord_out;
818	hw->dmar_block = atl1c_dma_req_1024;
819
820	if (atl1c_alloc_queues(adapter)) {
821		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
822		return -ENOMEM;
823	}
824	/* TODO */
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);
830
831	return 0;
832}
833
834static inline void atl1c_clean_buffer(struct pci_dev *pdev,
835				struct atl1c_buffer *buffer_info)
836{
837	u16 pci_driection;
838	if (buffer_info->flags & ATL1C_BUFFER_FREE)
839		return;
840	if (buffer_info->dma) {
841		if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
842			pci_driection = PCI_DMA_FROMDEVICE;
843		else
844			pci_driection = PCI_DMA_TODEVICE;
845
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);
852	}
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);
858}
859/**
860 * atl1c_clean_tx_ring - Free Tx-skb
861 * @adapter: board private structure
862 */
863static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
864				enum atl1c_trans_queue type)
865{
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;
870
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);
875	}
876
877	/* Zero out Tx-buffers */
878	memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
879		ring_count);
880	atomic_set(&tpd_ring->next_to_clean, 0);
881	tpd_ring->next_to_use = 0;
882}
883
884/**
885 * atl1c_clean_rx_ring - Free rx-reservation skbs
886 * @adapter: board private structure
887 */
888static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
889{
890	struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
891	struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
892	struct atl1c_buffer *buffer_info;
893	struct pci_dev *pdev = adapter->pdev;
894	int j;
895
896	for (j = 0; j < rfd_ring->count; j++) {
897		buffer_info = &rfd_ring->buffer_info[j];
898		atl1c_clean_buffer(pdev, buffer_info);
899	}
900	/* zero out the descriptor ring */
901	memset(rfd_ring->desc, 0, rfd_ring->size);
902	rfd_ring->next_to_clean = 0;
903	rfd_ring->next_to_use = 0;
904	rrd_ring->next_to_use = 0;
905	rrd_ring->next_to_clean = 0;
906}
907
908/*
909 * Read / Write Ptr Initialize:
910 */
911static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
912{
913	struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
914	struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
915	struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
916	struct atl1c_buffer *buffer_info;
917	int i, j;
918
919	for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
920		tpd_ring[i].next_to_use = 0;
921		atomic_set(&tpd_ring[i].next_to_clean, 0);
922		buffer_info = tpd_ring[i].buffer_info;
923		for (j = 0; j < tpd_ring->count; j++)
924			ATL1C_SET_BUFFER_STATE(&buffer_info[i],
925					ATL1C_BUFFER_FREE);
926	}
927	rfd_ring->next_to_use = 0;
928	rfd_ring->next_to_clean = 0;
929	rrd_ring->next_to_use = 0;
930	rrd_ring->next_to_clean = 0;
931	for (j = 0; j < rfd_ring->count; j++) {
932		buffer_info = &rfd_ring->buffer_info[j];
933		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
934	}
935}
936
937/**
938 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
939 * @adapter: board private structure
940 *
941 * Free all transmit software resources
942 */
943static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
944{
945	struct pci_dev *pdev = adapter->pdev;
946
947	pci_free_consistent(pdev, adapter->ring_header.size,
948					adapter->ring_header.desc,
949					adapter->ring_header.dma);
950	adapter->ring_header.desc = NULL;
951
952	/* Note: just free tdp_ring.buffer_info,
953	*  it contain rfd_ring.buffer_info, do not double free */
954	if (adapter->tpd_ring[0].buffer_info) {
955		kfree(adapter->tpd_ring[0].buffer_info);
956		adapter->tpd_ring[0].buffer_info = NULL;
957	}
958	if (adapter->rx_page) {
959		put_page(adapter->rx_page);
960		adapter->rx_page = NULL;
961	}
962}
963
964/**
965 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
966 * @adapter: board private structure
967 *
968 * Return 0 on success, negative on failure
969 */
970static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
971{
972	struct pci_dev *pdev = adapter->pdev;
973	struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
974	struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
975	struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
976	struct atl1c_ring_header *ring_header = &adapter->ring_header;
977	int size;
978	int i;
979	int count = 0;
980	int rx_desc_count = 0;
981	u32 offset = 0;
982
983	rrd_ring->count = rfd_ring->count;
984	for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
985		tpd_ring[i].count = tpd_ring[0].count;
986
987	/* 2 tpd queue, one high priority queue,
988	 * another normal priority queue */
989	size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
990		rfd_ring->count);
991	tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
992	if (unlikely(!tpd_ring->buffer_info))
993		goto err_nomem;
994
995	for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
996		tpd_ring[i].buffer_info =
997			(tpd_ring->buffer_info + count);
998		count += tpd_ring[i].count;
999	}
1000
1001	rfd_ring->buffer_info =
1002		(tpd_ring->buffer_info + count);
1003	count += rfd_ring->count;
1004	rx_desc_count += rfd_ring->count;
1005
1006	/*
1007	 * real ring DMA buffer
1008	 * each ring/block may need up to 8 bytes for alignment, hence the
1009	 * additional bytes tacked onto the end.
1010	 */
1011	ring_header->size = size =
1012		sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1013		sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1014		sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1015		8 * 4;
1016
1017	ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size,
1018						&ring_header->dma, GFP_KERNEL);
1019	if (unlikely(!ring_header->desc)) {
1020		dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1021		goto err_nomem;
1022	}
1023	/* init TPD ring */
1024
1025	tpd_ring[0].dma = roundup(ring_header->dma, 8);
1026	offset = tpd_ring[0].dma - ring_header->dma;
1027	for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1028		tpd_ring[i].dma = ring_header->dma + offset;
1029		tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1030		tpd_ring[i].size =
1031			sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1032		offset += roundup(tpd_ring[i].size, 8);
1033	}
1034	/* init RFD ring */
1035	rfd_ring->dma = ring_header->dma + offset;
1036	rfd_ring->desc = (u8 *) ring_header->desc + offset;
1037	rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1038	offset += roundup(rfd_ring->size, 8);
1039
1040	/* init RRD ring */
1041	rrd_ring->dma = ring_header->dma + offset;
1042	rrd_ring->desc = (u8 *) ring_header->desc + offset;
1043	rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1044		rrd_ring->count;
1045	offset += roundup(rrd_ring->size, 8);
1046
1047	return 0;
1048
1049err_nomem:
1050	kfree(tpd_ring->buffer_info);
1051	return -ENOMEM;
1052}
1053
1054static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1055{
1056	struct atl1c_hw *hw = &adapter->hw;
1057	struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1058	struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1059	struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1060				adapter->tpd_ring;
1061
1062	/* TPD */
1063	AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1064			(u32)((tpd_ring[atl1c_trans_normal].dma &
1065				AT_DMA_HI_ADDR_MASK) >> 32));
1066	/* just enable normal priority TX queue */
1067	AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1068			(u32)(tpd_ring[atl1c_trans_normal].dma &
1069				AT_DMA_LO_ADDR_MASK));
1070	AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1071			(u32)(tpd_ring[atl1c_trans_high].dma &
1072				AT_DMA_LO_ADDR_MASK));
1073	AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1074			(u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1075
1076
1077	/* RFD */
1078	AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1079			(u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1080	AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1081			(u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1082
1083	AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1084			rfd_ring->count & RFD_RING_SIZE_MASK);
1085	AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1086			adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1087
1088	/* RRD */
1089	AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1090			(u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1091	AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1092			(rrd_ring->count & RRD_RING_SIZE_MASK));
1093
1094	if (hw->nic_type == athr_l2c_b) {
1095		AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1096		AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1097		AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1098		AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1099		AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1100		AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1101		AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);	/* TX watermark, to enter l1 state.*/
1102		AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);		/* RXD threshold.*/
1103	}
1104	/* Load all of base address above */
1105	AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1106}
1107
1108static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1109{
1110	struct atl1c_hw *hw = &adapter->hw;
1111	int max_pay_load;
1112	u16 tx_offload_thresh;
1113	u32 txq_ctrl_data;
1114
1115	tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1116	AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1117		(tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1118	max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1119	hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1120	/*
1121	 * if BIOS had changed the dam-read-max-length to an invalid value,
1122	 * restore it to default value
1123	 */
1124	if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1125		pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1126		hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1127	}
1128	txq_ctrl_data =
1129		hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1130		L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1131
1132	AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1133}
1134
1135static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1136{
1137	struct atl1c_hw *hw = &adapter->hw;
1138	u32 rxq_ctrl_data;
1139
1140	rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1141			RXQ_RFD_BURST_NUM_SHIFT;
1142
1143	if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1144		rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1145
1146	/* aspm for gigabit */
1147	if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1148		rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1149			ASPM_THRUPUT_LIMIT_100M);
1150
1151	AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1152}
1153
1154static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1155{
1156	struct atl1c_hw *hw = &adapter->hw;
1157	u32 dma_ctrl_data;
1158
1159	dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1160		DMA_CTRL_RREQ_PRI_DATA |
1161		FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1162		FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1163		FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1164
1165	AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1166}
1167
1168/*
1169 * Stop the mac, transmit and receive units
1170 * hw - Struct containing variables accessed by shared code
1171 * return : 0  or  idle status (if error)
1172 */
1173static int atl1c_stop_mac(struct atl1c_hw *hw)
1174{
1175	u32 data;
1176
1177	AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1178	data &= ~RXQ_CTRL_EN;
1179	AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1180
1181	AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1182	data &= ~TXQ_CTRL_EN;
1183	AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1184
1185	atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1186
1187	AT_READ_REG(hw, REG_MAC_CTRL, &data);
1188	data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1189	AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1190
1191	return (int)atl1c_wait_until_idle(hw,
1192		IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1193}
1194
1195static void atl1c_start_mac(struct atl1c_adapter *adapter)
1196{
1197	struct atl1c_hw *hw = &adapter->hw;
1198	u32 mac, txq, rxq;
1199
1200	hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1201	hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1202		atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1203
1204	AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1205	AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1206	AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1207
1208	txq |= TXQ_CTRL_EN;
1209	rxq |= RXQ_CTRL_EN;
1210	mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1211	       MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1212	       MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1213	       MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1214	       MAC_CTRL_HASH_ALG_CRC32;
1215	if (hw->mac_duplex)
1216		mac |= MAC_CTRL_DUPLX;
1217	else
1218		mac &= ~MAC_CTRL_DUPLX;
1219	mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1220	mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1221
1222	AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1223	AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1224	AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1225}
1226
1227/*
1228 * Reset the transmit and receive units; mask and clear all interrupts.
1229 * hw - Struct containing variables accessed by shared code
1230 * return : 0  or  idle status (if error)
1231 */
1232static int atl1c_reset_mac(struct atl1c_hw *hw)
1233{
1234	struct atl1c_adapter *adapter = hw->adapter;
1235	struct pci_dev *pdev = adapter->pdev;
1236	u32 ctrl_data = 0;
1237
1238	atl1c_stop_mac(hw);
1239	/*
1240	 * Issue Soft Reset to the MAC.  This will reset the chip's
1241	 * transmit, receive, DMA.  It will not effect
1242	 * the current PCI configuration.  The global reset bit is self-
1243	 * clearing, and should clear within a microsecond.
1244	 */
1245	AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1246	ctrl_data |= MASTER_CTRL_OOB_DIS;
1247	AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1248
1249	AT_WRITE_FLUSH(hw);
1250	msleep(10);
1251	/* Wait at least 10ms for All module to be Idle */
1252
1253	if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1254		dev_err(&pdev->dev,
1255			"MAC state machine can't be idle since"
1256			" disabled for 10ms second\n");
1257		return -1;
1258	}
1259	AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1260
1261	/* driver control speed/duplex */
1262	AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1263	AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1264
1265	/* clk switch setting */
1266	AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1267	switch (hw->nic_type) {
1268	case athr_l2c_b:
1269		ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1270				SERDES_MAC_CLK_SLOWDOWN);
1271		AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1272		break;
1273	case athr_l2c_b2:
1274	case athr_l1d_2:
1275		ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1276		AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1277		break;
1278	default:
1279		break;
1280	}
1281
1282	return 0;
1283}
1284
1285static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1286{
1287	u16 ctrl_flags = hw->ctrl_flags;
1288
1289	hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1290	atl1c_set_aspm(hw, SPEED_0);
1291	hw->ctrl_flags = ctrl_flags;
1292}
1293
1294/*
1295 * Set ASPM state.
1296 * Enable/disable L0s/L1 depend on link state.
1297 */
1298static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1299{
1300	u32 pm_ctrl_data;
1301	u32 link_l1_timer;
1302
1303	AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1304	pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1305			  PM_CTRL_ASPM_L0S_EN |
1306			  PM_CTRL_MAC_ASPM_CHK);
1307	/* L1 timer */
1308	if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1309		pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1310		link_l1_timer =
1311			link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1312			L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1313		pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1314			L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1315	} else {
1316		link_l1_timer = hw->nic_type == athr_l2c_b ?
1317			L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1318		if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1319			link_l1_timer = 1;
1320		pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1321			PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1322	}
1323
1324	/* L0S/L1 enable */
1325	if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1326		pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1327	if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1328		pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1329
1330	/* l2cb & l1d & l2cb2 & l1d2 */
1331	if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1332	    hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1333		pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1334			PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1335		pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1336				PM_CTRL_SERDES_PD_EX_L1 |
1337				PM_CTRL_CLK_SWH_L1;
1338		pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1339				  PM_CTRL_SERDES_PLL_L1_EN |
1340				  PM_CTRL_SERDES_BUFS_RX_L1_EN |
1341				  PM_CTRL_SA_DLY_EN |
1342				  PM_CTRL_HOTRST);
1343		/* disable l0s if link down or l2cb */
1344		if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1345			pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1346	} else { /* l1c */
1347		pm_ctrl_data =
1348			FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1349		if (link_speed != SPEED_0) {
1350			pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1351					PM_CTRL_SERDES_PLL_L1_EN |
1352					PM_CTRL_SERDES_BUFS_RX_L1_EN;
1353			pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1354					  PM_CTRL_CLK_SWH_L1 |
1355					  PM_CTRL_ASPM_L0S_EN |
1356					  PM_CTRL_ASPM_L1_EN);
1357		} else { /* link down */
1358			pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1359			pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1360					  PM_CTRL_SERDES_PLL_L1_EN |
1361					  PM_CTRL_SERDES_BUFS_RX_L1_EN |
1362					  PM_CTRL_ASPM_L0S_EN);
1363		}
1364	}
1365	AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1366
1367	return;
1368}
1369
1370/**
1371 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1372 * @adapter: board private structure
1373 *
1374 * Configure the Tx /Rx unit of the MAC after a reset.
1375 */
1376static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1377{
1378	struct atl1c_hw *hw = &adapter->hw;
1379	u32 master_ctrl_data = 0;
1380	u32 intr_modrt_data;
1381	u32 data;
1382
1383	AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1384	master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1385			      MASTER_CTRL_RX_ITIMER_EN |
1386			      MASTER_CTRL_INT_RDCLR);
1387	/* clear interrupt status */
1388	AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1389	/*  Clear any WOL status */
1390	AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1391	/* set Interrupt Clear Timer
1392	 * HW will enable self to assert interrupt event to system after
1393	 * waiting x-time for software to notify it accept interrupt.
1394	 */
1395
1396	data = CLK_GATING_EN_ALL;
1397	if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1398		if (hw->nic_type == athr_l2c_b)
1399			data &= ~CLK_GATING_RXMAC_EN;
1400	} else
1401		data = 0;
1402	AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1403
1404	AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1405		hw->ict & INT_RETRIG_TIMER_MASK);
1406
1407	atl1c_configure_des_ring(adapter);
1408
1409	if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1410		intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1411					IRQ_MODRT_TX_TIMER_SHIFT;
1412		intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1413					IRQ_MODRT_RX_TIMER_SHIFT;
1414		AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1415		master_ctrl_data |=
1416			MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1417	}
1418
1419	if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1420		master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1421
1422	master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1423	AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1424
1425	AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1426		hw->smb_timer & SMB_STAT_TIMER_MASK);
1427
1428	/* set MTU */
1429	AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1430			VLAN_HLEN + ETH_FCS_LEN);
1431
1432	atl1c_configure_tx(adapter);
1433	atl1c_configure_rx(adapter);
1434	atl1c_configure_dma(adapter);
1435
1436	return 0;
1437}
1438
1439static int atl1c_configure(struct atl1c_adapter *adapter)
1440{
1441	struct net_device *netdev = adapter->netdev;
1442	int num;
1443
1444	atl1c_init_ring_ptrs(adapter);
1445	atl1c_set_multi(netdev);
1446	atl1c_restore_vlan(adapter);
1447
1448	num = atl1c_alloc_rx_buffer(adapter);
1449	if (unlikely(num == 0))
1450		return -ENOMEM;
1451
1452	if (atl1c_configure_mac(adapter))
1453		return -EIO;
1454
1455	return 0;
1456}
1457
1458static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1459{
1460	u16 hw_reg_addr = 0;
1461	unsigned long *stats_item = NULL;
1462	u32 data;
1463
1464	/* update rx status */
1465	hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1466	stats_item  = &adapter->hw_stats.rx_ok;
1467	while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1468		AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1469		*stats_item += data;
1470		stats_item++;
1471		hw_reg_addr += 4;
1472	}
1473/* update tx status */
1474	hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1475	stats_item  = &adapter->hw_stats.tx_ok;
1476	while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1477		AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1478		*stats_item += data;
1479		stats_item++;
1480		hw_reg_addr += 4;
1481	}
1482}
1483
1484/**
1485 * atl1c_get_stats - Get System Network Statistics
1486 * @netdev: network interface device structure
1487 *
1488 * Returns the address of the device statistics structure.
1489 * The statistics are actually updated from the timer callback.
1490 */
1491static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1492{
1493	struct atl1c_adapter *adapter = netdev_priv(netdev);
1494	struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1495	struct net_device_stats *net_stats = &netdev->stats;
1496
1497	atl1c_update_hw_stats(adapter);
1498	net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1499	net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1500	net_stats->multicast  = hw_stats->rx_mcast;
1501	net_stats->collisions = hw_stats->tx_1_col +
1502				hw_stats->tx_2_col +
1503				hw_stats->tx_late_col +
1504				hw_stats->tx_abort_col;
1505
1506	net_stats->rx_errors  = hw_stats->rx_frag +
1507				hw_stats->rx_fcs_err +
1508				hw_stats->rx_len_err +
1509				hw_stats->rx_sz_ov +
1510				hw_stats->rx_rrd_ov +
1511				hw_stats->rx_align_err +
1512				hw_stats->rx_rxf_ov;
1513
1514	net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1515	net_stats->rx_length_errors = hw_stats->rx_len_err;
1516	net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1517	net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1518	net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1519
1520	net_stats->tx_errors = hw_stats->tx_late_col +
1521			       hw_stats->tx_abort_col +
1522			       hw_stats->tx_underrun +
1523			       hw_stats->tx_trunc;
1524
1525	net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1526	net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1527	net_stats->tx_window_errors  = hw_stats->tx_late_col;
1528
1529	net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1530	net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1531
1532	return net_stats;
1533}
1534
1535static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1536{
1537	u16 phy_data;
1538
1539	spin_lock(&adapter->mdio_lock);
1540	atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1541	spin_unlock(&adapter->mdio_lock);
1542}
1543
1544static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1545				enum atl1c_trans_queue type)
1546{
1547	struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1548	struct atl1c_buffer *buffer_info;
1549	struct pci_dev *pdev = adapter->pdev;
1550	u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1551	u16 hw_next_to_clean;
1552	u16 reg;
1553
1554	reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1555
1556	AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1557
1558	while (next_to_clean != hw_next_to_clean) {
1559		buffer_info = &tpd_ring->buffer_info[next_to_clean];
1560		atl1c_clean_buffer(pdev, buffer_info);
1561		if (++next_to_clean == tpd_ring->count)
1562			next_to_clean = 0;
1563		atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1564	}
1565
1566	if (netif_queue_stopped(adapter->netdev) &&
1567			netif_carrier_ok(adapter->netdev)) {
1568		netif_wake_queue(adapter->netdev);
1569	}
1570
1571	return true;
1572}
1573
1574/**
1575 * atl1c_intr - Interrupt Handler
1576 * @irq: interrupt number
1577 * @data: pointer to a network interface device structure
1578 */
1579static irqreturn_t atl1c_intr(int irq, void *data)
1580{
1581	struct net_device *netdev  = data;
1582	struct atl1c_adapter *adapter = netdev_priv(netdev);
1583	struct pci_dev *pdev = adapter->pdev;
1584	struct atl1c_hw *hw = &adapter->hw;
1585	int max_ints = AT_MAX_INT_WORK;
1586	int handled = IRQ_NONE;
1587	u32 status;
1588	u32 reg_data;
1589
1590	do {
1591		AT_READ_REG(hw, REG_ISR, &reg_data);
1592		status = reg_data & hw->intr_mask;
1593
1594		if (status == 0 || (status & ISR_DIS_INT) != 0) {
1595			if (max_ints != AT_MAX_INT_WORK)
1596				handled = IRQ_HANDLED;
1597			break;
1598		}
1599		/* link event */
1600		if (status & ISR_GPHY)
1601			atl1c_clear_phy_int(adapter);
1602		/* Ack ISR */
1603		AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1604		if (status & ISR_RX_PKT) {
1605			if (likely(napi_schedule_prep(&adapter->napi))) {
1606				hw->intr_mask &= ~ISR_RX_PKT;
1607				AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1608				__napi_schedule(&adapter->napi);
1609			}
1610		}
1611		if (status & ISR_TX_PKT)
1612			atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1613
1614		handled = IRQ_HANDLED;
1615		/* check if PCIE PHY Link down */
1616		if (status & ISR_ERROR) {
1617			if (netif_msg_hw(adapter))
1618				dev_err(&pdev->dev,
1619					"atl1c hardware error (status = 0x%x)\n",
1620					status & ISR_ERROR);
1621			/* reset MAC */
1622			set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1623			schedule_work(&adapter->common_task);
1624			return IRQ_HANDLED;
1625		}
1626
1627		if (status & ISR_OVER)
1628			if (netif_msg_intr(adapter))
1629				dev_warn(&pdev->dev,
1630					"TX/RX overflow (status = 0x%x)\n",
1631					status & ISR_OVER);
1632
1633		/* link event */
1634		if (status & (ISR_GPHY | ISR_MANUAL)) {
1635			netdev->stats.tx_carrier_errors++;
1636			atl1c_link_chg_event(adapter);
1637			break;
1638		}
1639
1640	} while (--max_ints > 0);
1641	/* re-enable Interrupt*/
1642	AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1643	return handled;
1644}
1645
1646static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1647		  struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1648{
1649	/*
1650	 * The pid field in RRS in not correct sometimes, so we
1651	 * cannot figure out if the packet is fragmented or not,
1652	 * so we tell the KERNEL CHECKSUM_NONE
1653	 */
1654	skb_checksum_none_assert(skb);
1655}
1656
1657static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1658{
1659	struct sk_buff *skb;
1660	struct page *page;
1661
1662	if (adapter->rx_frag_size > PAGE_SIZE)
1663		return netdev_alloc_skb(adapter->netdev,
1664					adapter->rx_buffer_len);
1665
1666	page = adapter->rx_page;
1667	if (!page) {
1668		adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1669		if (unlikely(!page))
1670			return NULL;
1671		adapter->rx_page_offset = 0;
1672	}
1673
1674	skb = build_skb(page_address(page) + adapter->rx_page_offset,
1675			adapter->rx_frag_size);
1676	if (likely(skb)) {
1677		adapter->rx_page_offset += adapter->rx_frag_size;
1678		if (adapter->rx_page_offset >= PAGE_SIZE)
1679			adapter->rx_page = NULL;
1680		else
1681			get_page(page);
1682	}
1683	return skb;
1684}
1685
1686static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1687{
1688	struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1689	struct pci_dev *pdev = adapter->pdev;
1690	struct atl1c_buffer *buffer_info, *next_info;
1691	struct sk_buff *skb;
1692	void *vir_addr = NULL;
1693	u16 num_alloc = 0;
1694	u16 rfd_next_to_use, next_next;
1695	struct atl1c_rx_free_desc *rfd_desc;
1696	dma_addr_t mapping;
1697
1698	next_next = rfd_next_to_use = rfd_ring->next_to_use;
1699	if (++next_next == rfd_ring->count)
1700		next_next = 0;
1701	buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1702	next_info = &rfd_ring->buffer_info[next_next];
1703
1704	while (next_info->flags & ATL1C_BUFFER_FREE) {
1705		rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1706
1707		skb = atl1c_alloc_skb(adapter);
1708		if (unlikely(!skb)) {
1709			if (netif_msg_rx_err(adapter))
1710				dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1711			break;
1712		}
1713
1714		/*
1715		 * Make buffer alignment 2 beyond a 16 byte boundary
1716		 * this will result in a 16 byte aligned IP header after
1717		 * the 14 byte MAC header is removed
1718		 */
1719		vir_addr = skb->data;
1720		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1721		buffer_info->skb = skb;
1722		buffer_info->length = adapter->rx_buffer_len;
1723		mapping = pci_map_single(pdev, vir_addr,
1724						buffer_info->length,
1725						PCI_DMA_FROMDEVICE);
1726		if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1727			dev_kfree_skb(skb);
1728			buffer_info->skb = NULL;
1729			buffer_info->length = 0;
1730			ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1731			netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1732			break;
1733		}
1734		buffer_info->dma = mapping;
1735		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1736			ATL1C_PCIMAP_FROMDEVICE);
1737		rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1738		rfd_next_to_use = next_next;
1739		if (++next_next == rfd_ring->count)
1740			next_next = 0;
1741		buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1742		next_info = &rfd_ring->buffer_info[next_next];
1743		num_alloc++;
1744	}
1745
1746	if (num_alloc) {
1747		/* TODO: update mailbox here */
1748		wmb();
1749		rfd_ring->next_to_use = rfd_next_to_use;
1750		AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1751			rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1752	}
1753
1754	return num_alloc;
1755}
1756
1757static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1758			struct	atl1c_recv_ret_status *rrs, u16 num)
1759{
1760	u16 i;
1761	/* the relationship between rrd and rfd is one map one */
1762	for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1763					rrd_ring->next_to_clean)) {
1764		rrs->word3 &= ~RRS_RXD_UPDATED;
1765		if (++rrd_ring->next_to_clean == rrd_ring->count)
1766			rrd_ring->next_to_clean = 0;
1767	}
1768}
1769
1770static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1771	struct atl1c_recv_ret_status *rrs, u16 num)
1772{
1773	u16 i;
1774	u16 rfd_index;
1775	struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1776
1777	rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1778			RRS_RX_RFD_INDEX_MASK;
1779	for (i = 0; i < num; i++) {
1780		buffer_info[rfd_index].skb = NULL;
1781		ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1782					ATL1C_BUFFER_FREE);
1783		if (++rfd_index == rfd_ring->count)
1784			rfd_index = 0;
1785	}
1786	rfd_ring->next_to_clean = rfd_index;
1787}
1788
1789static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1790		   int *work_done, int work_to_do)
1791{
1792	u16 rfd_num, rfd_index;
1793	u16 count = 0;
1794	u16 length;
1795	struct pci_dev *pdev = adapter->pdev;
1796	struct net_device *netdev  = adapter->netdev;
1797	struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1798	struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1799	struct sk_buff *skb;
1800	struct atl1c_recv_ret_status *rrs;
1801	struct atl1c_buffer *buffer_info;
1802
1803	while (1) {
1804		if (*work_done >= work_to_do)
1805			break;
1806		rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1807		if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1808			rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1809				RRS_RX_RFD_CNT_MASK;
1810			if (unlikely(rfd_num != 1))
1811				/* TODO support mul rfd*/
1812				if (netif_msg_rx_err(adapter))
1813					dev_warn(&pdev->dev,
1814						"Multi rfd not support yet!\n");
1815			goto rrs_checked;
1816		} else {
1817			break;
1818		}
1819rrs_checked:
1820		atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1821		if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1822			atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1823				if (netif_msg_rx_err(adapter))
1824					dev_warn(&pdev->dev,
1825						"wrong packet! rrs word3 is %x\n",
1826						rrs->word3);
1827			continue;
1828		}
1829
1830		length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1831				RRS_PKT_SIZE_MASK);
1832		/* Good Receive */
1833		if (likely(rfd_num == 1)) {
1834			rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1835					RRS_RX_RFD_INDEX_MASK;
1836			buffer_info = &rfd_ring->buffer_info[rfd_index];
1837			pci_unmap_single(pdev, buffer_info->dma,
1838				buffer_info->length, PCI_DMA_FROMDEVICE);
1839			skb = buffer_info->skb;
1840		} else {
1841			/* TODO */
1842			if (netif_msg_rx_err(adapter))
1843				dev_warn(&pdev->dev,
1844					"Multi rfd not support yet!\n");
1845			break;
1846		}
1847		atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1848		skb_put(skb, length - ETH_FCS_LEN);
1849		skb->protocol = eth_type_trans(skb, netdev);
1850		atl1c_rx_checksum(adapter, skb, rrs);
1851		if (rrs->word3 & RRS_VLAN_INS) {
1852			u16 vlan;
1853
1854			AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1855			vlan = le16_to_cpu(vlan);
1856			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1857		}
1858		netif_receive_skb(skb);
1859
1860		(*work_done)++;
1861		count++;
1862	}
1863	if (count)
1864		atl1c_alloc_rx_buffer(adapter);
1865}
1866
1867/**
1868 * atl1c_clean - NAPI Rx polling callback
1869 */
1870static int atl1c_clean(struct napi_struct *napi, int budget)
1871{
1872	struct atl1c_adapter *adapter =
1873			container_of(napi, struct atl1c_adapter, napi);
1874	int work_done = 0;
1875
1876	/* Keep link state information with original netdev */
1877	if (!netif_carrier_ok(adapter->netdev))
1878		goto quit_polling;
1879	/* just enable one RXQ */
1880	atl1c_clean_rx_irq(adapter, &work_done, budget);
1881
1882	if (work_done < budget) {
1883quit_polling:
1884		napi_complete(napi);
1885		adapter->hw.intr_mask |= ISR_RX_PKT;
1886		AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1887	}
1888	return work_done;
1889}
1890
1891#ifdef CONFIG_NET_POLL_CONTROLLER
1892
1893/*
1894 * Polling 'interrupt' - used by things like netconsole to send skbs
1895 * without having to re-enable interrupts. It's not called while
1896 * the interrupt routine is executing.
1897 */
1898static void atl1c_netpoll(struct net_device *netdev)
1899{
1900	struct atl1c_adapter *adapter = netdev_priv(netdev);
1901
1902	disable_irq(adapter->pdev->irq);
1903	atl1c_intr(adapter->pdev->irq, netdev);
1904	enable_irq(adapter->pdev->irq);
1905}
1906#endif
1907
1908static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1909{
1910	struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1911	u16 next_to_use = 0;
1912	u16 next_to_clean = 0;
1913
1914	next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1915	next_to_use   = tpd_ring->next_to_use;
1916
1917	return (u16)(next_to_clean > next_to_use) ?
1918		(next_to_clean - next_to_use - 1) :
1919		(tpd_ring->count + next_to_clean - next_to_use - 1);
1920}
1921
1922/*
1923 * get next usable tpd
1924 * Note: should call atl1c_tdp_avail to make sure
1925 * there is enough tpd to use
1926 */
1927static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1928	enum atl1c_trans_queue type)
1929{
1930	struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1931	struct atl1c_tpd_desc *tpd_desc;
1932	u16 next_to_use = 0;
1933
1934	next_to_use = tpd_ring->next_to_use;
1935	if (++tpd_ring->next_to_use == tpd_ring->count)
1936		tpd_ring->next_to_use = 0;
1937	tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1938	memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1939	return	tpd_desc;
1940}
1941
1942static struct atl1c_buffer *
1943atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1944{
1945	struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1946
1947	return &tpd_ring->buffer_info[tpd -
1948			(struct atl1c_tpd_desc *)tpd_ring->desc];
1949}
1950
1951/* Calculate the transmit packet descript needed*/
1952static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1953{
1954	u16 tpd_req;
1955	u16 proto_hdr_len = 0;
1956
1957	tpd_req = skb_shinfo(skb)->nr_frags + 1;
1958
1959	if (skb_is_gso(skb)) {
1960		proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1961		if (proto_hdr_len < skb_headlen(skb))
1962			tpd_req++;
1963		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1964			tpd_req++;
1965	}
1966	return tpd_req;
1967}
1968
1969static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1970			  struct sk_buff *skb,
1971			  struct atl1c_tpd_desc **tpd,
1972			  enum atl1c_trans_queue type)
1973{
1974	struct pci_dev *pdev = adapter->pdev;
1975	unsigned short offload_type;
1976	u8 hdr_len;
1977	u32 real_len;
1978
1979	if (skb_is_gso(skb)) {
1980		int err;
1981
1982		err = skb_cow_head(skb, 0);
1983		if (err < 0)
1984			return err;
1985
1986		offload_type = skb_shinfo(skb)->gso_type;
1987
1988		if (offload_type & SKB_GSO_TCPV4) {
1989			real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1990					+ ntohs(ip_hdr(skb)->tot_len));
1991
1992			if (real_len < skb->len)
1993				pskb_trim(skb, real_len);
1994
1995			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1996			if (unlikely(skb->len == hdr_len)) {
1997				/* only xsum need */
1998				if (netif_msg_tx_queued(adapter))
1999					dev_warn(&pdev->dev,
2000						"IPV4 tso with zero data??\n");
2001				goto check_sum;
2002			} else {
2003				ip_hdr(skb)->check = 0;
2004				tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2005							ip_hdr(skb)->saddr,
2006							ip_hdr(skb)->daddr,
2007							0, IPPROTO_TCP, 0);
2008				(*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2009			}
2010		}
2011
2012		if (offload_type & SKB_GSO_TCPV6) {
2013			struct atl1c_tpd_ext_desc *etpd =
2014				*(struct atl1c_tpd_ext_desc **)(tpd);
2015
2016			memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2017			*tpd = atl1c_get_tpd(adapter, type);
2018			ipv6_hdr(skb)->payload_len = 0;
2019			/* check payload == 0 byte ? */
2020			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2021			if (unlikely(skb->len == hdr_len)) {
2022				/* only xsum need */
2023				if (netif_msg_tx_queued(adapter))
2024					dev_warn(&pdev->dev,
2025						"IPV6 tso with zero data??\n");
2026				goto check_sum;
2027			} else
2028				tcp_hdr(skb)->check = ~csum_ipv6_magic(
2029						&ipv6_hdr(skb)->saddr,
2030						&ipv6_hdr(skb)->daddr,
2031						0, IPPROTO_TCP, 0);
2032			etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2033			etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2034			etpd->pkt_len = cpu_to_le32(skb->len);
2035			(*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2036		}
2037
2038		(*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2039		(*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2040				TPD_TCPHDR_OFFSET_SHIFT;
2041		(*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2042				TPD_MSS_SHIFT;
2043		return 0;
2044	}
2045
2046check_sum:
2047	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2048		u8 css, cso;
2049		cso = skb_checksum_start_offset(skb);
2050
2051		if (unlikely(cso & 0x1)) {
2052			if (netif_msg_tx_err(adapter))
2053				dev_err(&adapter->pdev->dev,
2054					"payload offset should not an event number\n");
2055			return -1;
2056		} else {
2057			css = cso + skb->csum_offset;
2058
2059			(*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2060					TPD_PLOADOFFSET_SHIFT;
2061			(*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2062					TPD_CCSUM_OFFSET_SHIFT;
2063			(*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2064		}
2065	}
2066	return 0;
2067}
2068
2069static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2070			      struct atl1c_tpd_desc *first_tpd,
2071			      enum atl1c_trans_queue type)
2072{
2073	struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2074	struct atl1c_buffer *buffer_info;
2075	struct atl1c_tpd_desc *tpd;
2076	u16 first_index, index;
2077
2078	first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2079	index = first_index;
2080	while (index != tpd_ring->next_to_use) {
2081		tpd = ATL1C_TPD_DESC(tpd_ring, index);
2082		buffer_info = &tpd_ring->buffer_info[index];
2083		atl1c_clean_buffer(adpt->pdev, buffer_info);
2084		memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2085		if (++index == tpd_ring->count)
2086			index = 0;
2087	}
2088	tpd_ring->next_to_use = first_index;
2089}
2090
2091static int atl1c_tx_map(struct atl1c_adapter *adapter,
2092		      struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2093			enum atl1c_trans_queue type)
2094{
2095	struct atl1c_tpd_desc *use_tpd = NULL;
2096	struct atl1c_buffer *buffer_info = NULL;
2097	u16 buf_len = skb_headlen(skb);
2098	u16 map_len = 0;
2099	u16 mapped_len = 0;
2100	u16 hdr_len = 0;
2101	u16 nr_frags;
2102	u16 f;
2103	int tso;
2104
2105	nr_frags = skb_shinfo(skb)->nr_frags;
2106	tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2107	if (tso) {
2108		/* TSO */
2109		map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2110		use_tpd = tpd;
2111
2112		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2113		buffer_info->length = map_len;
2114		buffer_info->dma = pci_map_single(adapter->pdev,
2115					skb->data, hdr_len, PCI_DMA_TODEVICE);
2116		if (unlikely(pci_dma_mapping_error(adapter->pdev,
2117						   buffer_info->dma)))
2118			goto err_dma;
2119		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2120		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2121			ATL1C_PCIMAP_TODEVICE);
2122		mapped_len += map_len;
2123		use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2124		use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2125	}
2126
2127	if (mapped_len < buf_len) {
2128		/* mapped_len == 0, means we should use the first tpd,
2129		   which is given by caller  */
2130		if (mapped_len == 0)
2131			use_tpd = tpd;
2132		else {
2133			use_tpd = atl1c_get_tpd(adapter, type);
2134			memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2135		}
2136		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2137		buffer_info->length = buf_len - mapped_len;
2138		buffer_info->dma =
2139			pci_map_single(adapter->pdev, skb->data + mapped_len,
2140					buffer_info->length, PCI_DMA_TODEVICE);
2141		if (unlikely(pci_dma_mapping_error(adapter->pdev,
2142						   buffer_info->dma)))
2143			goto err_dma;
2144
2145		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2146		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2147			ATL1C_PCIMAP_TODEVICE);
2148		use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2149		use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2150	}
2151
2152	for (f = 0; f < nr_frags; f++) {
2153		struct skb_frag_struct *frag;
2154
2155		frag = &skb_shinfo(skb)->frags[f];
2156
2157		use_tpd = atl1c_get_tpd(adapter, type);
2158		memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2159
2160		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2161		buffer_info->length = skb_frag_size(frag);
2162		buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2163						    frag, 0,
2164						    buffer_info->length,
2165						    DMA_TO_DEVICE);
2166		if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2167			goto err_dma;
2168
2169		ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2170		ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2171			ATL1C_PCIMAP_TODEVICE);
2172		use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2173		use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2174	}
2175
2176	/* The last tpd */
2177	use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2178	/* The last buffer info contain the skb address,
2179	   so it will be free after unmap */
2180	buffer_info->skb = skb;
2181
2182	return 0;
2183
2184err_dma:
2185	buffer_info->dma = 0;
2186	buffer_info->length = 0;
2187	return -1;
2188}
2189
2190static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2191			   struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2192{
2193	struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2194	u16 reg;
2195
2196	reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2197	AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2198}
2199
2200static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2201					  struct net_device *netdev)
2202{
2203	struct atl1c_adapter *adapter = netdev_priv(netdev);
2204	unsigned long flags;
2205	u16 tpd_req = 1;
2206	struct atl1c_tpd_desc *tpd;
2207	enum atl1c_trans_queue type = atl1c_trans_normal;
2208
2209	if (test_bit(__AT_DOWN, &adapter->flags)) {
2210		dev_kfree_skb_any(skb);
2211		return NETDEV_TX_OK;
2212	}
2213
2214	tpd_req = atl1c_cal_tpd_req(skb);
2215	if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2216		if (netif_msg_pktdata(adapter))
2217			dev_info(&adapter->pdev->dev, "tx locked\n");
2218		return NETDEV_TX_LOCKED;
2219	}
2220
2221	if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2222		/* no enough descriptor, just stop queue */
2223		netif_stop_queue(netdev);
2224		spin_unlock_irqrestore(&adapter->tx_lock, flags);
2225		return NETDEV_TX_BUSY;
2226	}
2227
2228	tpd = atl1c_get_tpd(adapter, type);
2229
2230	/* do TSO and check sum */
2231	if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2232		spin_unlock_irqrestore(&adapter->tx_lock, flags);
2233		dev_kfree_skb_any(skb);
2234		return NETDEV_TX_OK;
2235	}
2236
2237	if (unlikely(skb_vlan_tag_present(skb))) {
2238		u16 vlan = skb_vlan_tag_get(skb);
2239		__le16 tag;
2240
2241		vlan = cpu_to_le16(vlan);
2242		AT_VLAN_TO_TAG(vlan, tag);
2243		tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2244		tpd->vlan_tag = tag;
2245	}
2246
2247	if (skb_network_offset(skb) != ETH_HLEN)
2248		tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2249
2250	if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2251		netif_info(adapter, tx_done, adapter->netdev,
2252			   "tx-skb droppted due to dma error\n");
2253		/* roll back tpd/buffer */
2254		atl1c_tx_rollback(adapter, tpd, type);
2255		spin_unlock_irqrestore(&adapter->tx_lock, flags);
2256		dev_kfree_skb_any(skb);
2257	} else {
2258		atl1c_tx_queue(adapter, skb, tpd, type);
2259		spin_unlock_irqrestore(&adapter->tx_lock, flags);
2260	}
2261
2262	return NETDEV_TX_OK;
2263}
2264
2265static void atl1c_free_irq(struct atl1c_adapter *adapter)
2266{
2267	struct net_device *netdev = adapter->netdev;
2268
2269	free_irq(adapter->pdev->irq, netdev);
2270
2271	if (adapter->have_msi)
2272		pci_disable_msi(adapter->pdev);
2273}
2274
2275static int atl1c_request_irq(struct atl1c_adapter *adapter)
2276{
2277	struct pci_dev    *pdev   = adapter->pdev;
2278	struct net_device *netdev = adapter->netdev;
2279	int flags = 0;
2280	int err = 0;
2281
2282	adapter->have_msi = true;
2283	err = pci_enable_msi(adapter->pdev);
2284	if (err) {
2285		if (netif_msg_ifup(adapter))
2286			dev_err(&pdev->dev,
2287				"Unable to allocate MSI interrupt Error: %d\n",
2288				err);
2289		adapter->have_msi = false;
2290	}
2291
2292	if (!adapter->have_msi)
2293		flags |= IRQF_SHARED;
2294	err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2295			netdev->name, netdev);
2296	if (err) {
2297		if (netif_msg_ifup(adapter))
2298			dev_err(&pdev->dev,
2299				"Unable to allocate interrupt Error: %d\n",
2300				err);
2301		if (adapter->have_msi)
2302			pci_disable_msi(adapter->pdev);
2303		return err;
2304	}
2305	if (netif_msg_ifup(adapter))
2306		dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2307	return err;
2308}
2309
2310
2311static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2312{
2313	/* release tx-pending skbs and reset tx/rx ring index */
2314	atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2315	atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2316	atl1c_clean_rx_ring(adapter);
2317}
2318
2319static int atl1c_up(struct atl1c_adapter *adapter)
2320{
2321	struct net_device *netdev = adapter->netdev;
2322	int err;
2323
2324	netif_carrier_off(netdev);
2325
2326	err = atl1c_configure(adapter);
2327	if (unlikely(err))
2328		goto err_up;
2329
2330	err = atl1c_request_irq(adapter);
2331	if (unlikely(err))
2332		goto err_up;
2333
2334	atl1c_check_link_status(adapter);
2335	clear_bit(__AT_DOWN, &adapter->flags);
2336	napi_enable(&adapter->napi);
2337	atl1c_irq_enable(adapter);
2338	netif_start_queue(netdev);
2339	return err;
2340
2341err_up:
2342	atl1c_clean_rx_ring(adapter);
2343	return err;
2344}
2345
2346static void atl1c_down(struct atl1c_adapter *adapter)
2347{
2348	struct net_device *netdev = adapter->netdev;
2349
2350	atl1c_del_timer(adapter);
2351	adapter->work_event = 0; /* clear all event */
2352	/* signal that we're down so the interrupt handler does not
2353	 * reschedule our watchdog timer */
2354	set_bit(__AT_DOWN, &adapter->flags);
2355	netif_carrier_off(netdev);
2356	napi_disable(&adapter->napi);
2357	atl1c_irq_disable(adapter);
2358	atl1c_free_irq(adapter);
2359	/* disable ASPM if device inactive */
2360	atl1c_disable_l0s_l1(&adapter->hw);
2361	/* reset MAC to disable all RX/TX */
2362	atl1c_reset_mac(&adapter->hw);
2363	msleep(1);
2364
2365	adapter->link_speed = SPEED_0;
2366	adapter->link_duplex = -1;
2367	atl1c_reset_dma_ring(adapter);
2368}
2369
2370/**
2371 * atl1c_open - Called when a network interface is made active
2372 * @netdev: network interface device structure
2373 *
2374 * Returns 0 on success, negative value on failure
2375 *
2376 * The open entry point is called when a network interface is made
2377 * active by the system (IFF_UP).  At this point all resources needed
2378 * for transmit and receive operations are allocated, the interrupt
2379 * handler is registered with the OS, the watchdog timer is started,
2380 * and the stack is notified that the interface is ready.
2381 */
2382static int atl1c_open(struct net_device *netdev)
2383{
2384	struct atl1c_adapter *adapter = netdev_priv(netdev);
2385	int err;
2386
2387	/* disallow open during test */
2388	if (test_bit(__AT_TESTING, &adapter->flags))
2389		return -EBUSY;
2390
2391	/* allocate rx/tx dma buffer & descriptors */
2392	err = atl1c_setup_ring_resources(adapter);
2393	if (unlikely(err))
2394		return err;
2395
2396	err = atl1c_up(adapter);
2397	if (unlikely(err))
2398		goto err_up;
2399
2400	return 0;
2401
2402err_up:
2403	atl1c_free_irq(adapter);
2404	atl1c_free_ring_resources(adapter);
2405	atl1c_reset_mac(&adapter->hw);
2406	return err;
2407}
2408
2409/**
2410 * atl1c_close - Disables a network interface
2411 * @netdev: network interface device structure
2412 *
2413 * Returns 0, this is not allowed to fail
2414 *
2415 * The close entry point is called when an interface is de-activated
2416 * by the OS.  The hardware is still under the drivers control, but
2417 * needs to be disabled.  A global MAC reset is issued to stop the
2418 * hardware, and all transmit and receive resources are freed.
2419 */
2420static int atl1c_close(struct net_device *netdev)
2421{
2422	struct atl1c_adapter *adapter = netdev_priv(netdev);
2423
2424	WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2425	set_bit(__AT_DOWN, &adapter->flags);
2426	cancel_work_sync(&adapter->common_task);
2427	atl1c_down(adapter);
2428	atl1c_free_ring_resources(adapter);
2429	return 0;
2430}
2431
2432static int atl1c_suspend(struct device *dev)
2433{
2434	struct pci_dev *pdev = to_pci_dev(dev);
2435	struct net_device *netdev = pci_get_drvdata(pdev);
2436	struct atl1c_adapter *adapter = netdev_priv(netdev);
2437	struct atl1c_hw *hw = &adapter->hw;
2438	u32 wufc = adapter->wol;
2439
2440	atl1c_disable_l0s_l1(hw);
2441	if (netif_running(netdev)) {
2442		WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2443		atl1c_down(adapter);
2444	}
2445	netif_device_detach(netdev);
2446
2447	if (wufc)
2448		if (atl1c_phy_to_ps_link(hw) != 0)
2449			dev_dbg(&pdev->dev, "phy power saving failed");
2450
2451	atl1c_power_saving(hw, wufc);
2452
2453	return 0;
2454}
2455
2456#ifdef CONFIG_PM_SLEEP
2457static int atl1c_resume(struct device *dev)
2458{
2459	struct pci_dev *pdev = to_pci_dev(dev);
2460	struct net_device *netdev = pci_get_drvdata(pdev);
2461	struct atl1c_adapter *adapter = netdev_priv(netdev);
2462
2463	AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2464	atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2465
2466	atl1c_phy_reset(&adapter->hw);
2467	atl1c_reset_mac(&adapter->hw);
2468	atl1c_phy_init(&adapter->hw);
2469
2470#if 0
2471	AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2472	pm_data &= ~PM_CTRLSTAT_PME_EN;
2473	AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2474#endif
2475
2476	netif_device_attach(netdev);
2477	if (netif_running(netdev))
2478		atl1c_up(adapter);
2479
2480	return 0;
2481}
2482#endif
2483
2484static void atl1c_shutdown(struct pci_dev *pdev)
2485{
2486	struct net_device *netdev = pci_get_drvdata(pdev);
2487	struct atl1c_adapter *adapter = netdev_priv(netdev);
2488
2489	atl1c_suspend(&pdev->dev);
2490	pci_wake_from_d3(pdev, adapter->wol);
2491	pci_set_power_state(pdev, PCI_D3hot);
2492}
2493
2494static const struct net_device_ops atl1c_netdev_ops = {
2495	.ndo_open		= atl1c_open,
2496	.ndo_stop		= atl1c_close,
2497	.ndo_validate_addr	= eth_validate_addr,
2498	.ndo_start_xmit		= atl1c_xmit_frame,
2499	.ndo_set_mac_address	= atl1c_set_mac_addr,
2500	.ndo_set_rx_mode	= atl1c_set_multi,
2501	.ndo_change_mtu		= atl1c_change_mtu,
2502	.ndo_fix_features	= atl1c_fix_features,
2503	.ndo_set_features	= atl1c_set_features,
2504	.ndo_do_ioctl		= atl1c_ioctl,
2505	.ndo_tx_timeout		= atl1c_tx_timeout,
2506	.ndo_get_stats		= atl1c_get_stats,
2507#ifdef CONFIG_NET_POLL_CONTROLLER
2508	.ndo_poll_controller	= atl1c_netpoll,
2509#endif
2510};
2511
2512static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2513{
2514	SET_NETDEV_DEV(netdev, &pdev->dev);
2515	pci_set_drvdata(pdev, netdev);
2516
2517	netdev->netdev_ops = &atl1c_netdev_ops;
2518	netdev->watchdog_timeo = AT_TX_WATCHDOG;
2519	atl1c_set_ethtool_ops(netdev);
2520
2521	/* TODO: add when ready */
2522	netdev->hw_features =	NETIF_F_SG		|
2523				NETIF_F_HW_CSUM		|
2524				NETIF_F_HW_VLAN_CTAG_RX	|
2525				NETIF_F_TSO		|
2526				NETIF_F_TSO6;
2527	netdev->features =	netdev->hw_features	|
2528				NETIF_F_HW_VLAN_CTAG_TX;
2529	return 0;
2530}
2531
2532/**
2533 * atl1c_probe - Device Initialization Routine
2534 * @pdev: PCI device information struct
2535 * @ent: entry in atl1c_pci_tbl
2536 *
2537 * Returns 0 on success, negative on failure
2538 *
2539 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2540 * The OS initialization, configuring of the adapter private structure,
2541 * and a hardware reset occur.
2542 */
2543static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2544{
2545	struct net_device *netdev;
2546	struct atl1c_adapter *adapter;
2547	static int cards_found;
2548
2549	int err = 0;
2550
2551	/* enable device (incl. PCI PM wakeup and hotplug setup) */
2552	err = pci_enable_device_mem(pdev);
2553	if (err) {
2554		dev_err(&pdev->dev, "cannot enable PCI device\n");
2555		return err;
2556	}
2557
2558	/*
2559	 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2560	 * shared register for the high 32 bits, so only a single, aligned,
2561	 * 4 GB physical address range can be used at a time.
2562	 *
2563	 * Supporting 64-bit DMA on this hardware is more trouble than it's
2564	 * worth.  It is far easier to limit to 32-bit DMA than update
2565	 * various kernel subsystems to support the mechanics required by a
2566	 * fixed-high-32-bit system.
2567	 */
2568	if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2569	    (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2570		dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2571		goto err_dma;
2572	}
2573
2574	err = pci_request_regions(pdev, atl1c_driver_name);
2575	if (err) {
2576		dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2577		goto err_pci_reg;
2578	}
2579
2580	pci_set_master(pdev);
2581
2582	netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2583	if (netdev == NULL) {
2584		err = -ENOMEM;
2585		goto err_alloc_etherdev;
2586	}
2587
2588	err = atl1c_init_netdev(netdev, pdev);
2589	if (err) {
2590		dev_err(&pdev->dev, "init netdevice failed\n");
2591		goto err_init_netdev;
2592	}
2593	adapter = netdev_priv(netdev);
2594	adapter->bd_number = cards_found;
2595	adapter->netdev = netdev;
2596	adapter->pdev = pdev;
2597	adapter->hw.adapter = adapter;
2598	adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2599	adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2600	if (!adapter->hw.hw_addr) {
2601		err = -EIO;
2602		dev_err(&pdev->dev, "cannot map device registers\n");
2603		goto err_ioremap;
2604	}
2605
2606	/* init mii data */
2607	adapter->mii.dev = netdev;
2608	adapter->mii.mdio_read  = atl1c_mdio_read;
2609	adapter->mii.mdio_write = atl1c_mdio_write;
2610	adapter->mii.phy_id_mask = 0x1f;
2611	adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2612	netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2613	setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2614			(unsigned long)adapter);
2615	/* setup the private structure */
2616	err = atl1c_sw_init(adapter);
2617	if (err) {
2618		dev_err(&pdev->dev, "net device private data init failed\n");
2619		goto err_sw_init;
2620	}
2621	atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2622
2623	/* Init GPHY as early as possible due to power saving issue  */
2624	atl1c_phy_reset(&adapter->hw);
2625
2626	err = atl1c_reset_mac(&adapter->hw);
2627	if (err) {
2628		err = -EIO;
2629		goto err_reset;
2630	}
2631
2632	/* reset the controller to
2633	 * put the device in a known good starting state */
2634	err = atl1c_phy_init(&adapter->hw);
2635	if (err) {
2636		err = -EIO;
2637		goto err_reset;
2638	}
2639	if (atl1c_read_mac_addr(&adapter->hw)) {
2640		/* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2641		netdev->addr_assign_type = NET_ADDR_RANDOM;
2642	}
2643	memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2644	if (netif_msg_probe(adapter))
2645		dev_dbg(&pdev->dev, "mac address : %pM\n",
2646			adapter->hw.mac_addr);
2647
2648	atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2649	INIT_WORK(&adapter->common_task, atl1c_common_task);
2650	adapter->work_event = 0;
2651	err = register_netdev(netdev);
2652	if (err) {
2653		dev_err(&pdev->dev, "register netdevice failed\n");
2654		goto err_register;
2655	}
2656
2657	if (netif_msg_probe(adapter))
2658		dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2659	cards_found++;
2660	return 0;
2661
2662err_reset:
2663err_register:
2664err_sw_init:
2665	iounmap(adapter->hw.hw_addr);
2666err_init_netdev:
2667err_ioremap:
2668	free_netdev(netdev);
2669err_alloc_etherdev:
2670	pci_release_regions(pdev);
2671err_pci_reg:
2672err_dma:
2673	pci_disable_device(pdev);
2674	return err;
2675}
2676
2677/**
2678 * atl1c_remove - Device Removal Routine
2679 * @pdev: PCI device information struct
2680 *
2681 * atl1c_remove is called by the PCI subsystem to alert the driver
2682 * that it should release a PCI device.  The could be caused by a
2683 * Hot-Plug event, or because the driver is going to be removed from
2684 * memory.
2685 */
2686static void atl1c_remove(struct pci_dev *pdev)
2687{
2688	struct net_device *netdev = pci_get_drvdata(pdev);
2689	struct atl1c_adapter *adapter = netdev_priv(netdev);
2690
2691	unregister_netdev(netdev);
2692	/* restore permanent address */
2693	atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2694	atl1c_phy_disable(&adapter->hw);
2695
2696	iounmap(adapter->hw.hw_addr);
2697
2698	pci_release_regions(pdev);
2699	pci_disable_device(pdev);
2700	free_netdev(netdev);
2701}
2702
2703/**
2704 * atl1c_io_error_detected - called when PCI error is detected
2705 * @pdev: Pointer to PCI device
2706 * @state: The current pci connection state
2707 *
2708 * This function is called after a PCI bus error affecting
2709 * this device has been detected.
2710 */
2711static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2712						pci_channel_state_t state)
2713{
2714	struct net_device *netdev = pci_get_drvdata(pdev);
2715	struct atl1c_adapter *adapter = netdev_priv(netdev);
2716
2717	netif_device_detach(netdev);
2718
2719	if (state == pci_channel_io_perm_failure)
2720		return PCI_ERS_RESULT_DISCONNECT;
2721
2722	if (netif_running(netdev))
2723		atl1c_down(adapter);
2724
2725	pci_disable_device(pdev);
2726
2727	/* Request a slot slot reset. */
2728	return PCI_ERS_RESULT_NEED_RESET;
2729}
2730
2731/**
2732 * atl1c_io_slot_reset - called after the pci bus has been reset.
2733 * @pdev: Pointer to PCI device
2734 *
2735 * Restart the card from scratch, as if from a cold-boot. Implementation
2736 * resembles the first-half of the e1000_resume routine.
2737 */
2738static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2739{
2740	struct net_device *netdev = pci_get_drvdata(pdev);
2741	struct atl1c_adapter *adapter = netdev_priv(netdev);
2742
2743	if (pci_enable_device(pdev)) {
2744		if (netif_msg_hw(adapter))
2745			dev_err(&pdev->dev,
2746				"Cannot re-enable PCI device after reset\n");
2747		return PCI_ERS_RESULT_DISCONNECT;
2748	}
2749	pci_set_master(pdev);
2750
2751	pci_enable_wake(pdev, PCI_D3hot, 0);
2752	pci_enable_wake(pdev, PCI_D3cold, 0);
2753
2754	atl1c_reset_mac(&adapter->hw);
2755
2756	return PCI_ERS_RESULT_RECOVERED;
2757}
2758
2759/**
2760 * atl1c_io_resume - called when traffic can start flowing again.
2761 * @pdev: Pointer to PCI device
2762 *
2763 * This callback is called when the error recovery driver tells us that
2764 * its OK to resume normal operation. Implementation resembles the
2765 * second-half of the atl1c_resume routine.
2766 */
2767static void atl1c_io_resume(struct pci_dev *pdev)
2768{
2769	struct net_device *netdev = pci_get_drvdata(pdev);
2770	struct atl1c_adapter *adapter = netdev_priv(netdev);
2771
2772	if (netif_running(netdev)) {
2773		if (atl1c_up(adapter)) {
2774			if (netif_msg_hw(adapter))
2775				dev_err(&pdev->dev,
2776					"Cannot bring device back up after reset\n");
2777			return;
2778		}
2779	}
2780
2781	netif_device_attach(netdev);
2782}
2783
2784static const struct pci_error_handlers atl1c_err_handler = {
2785	.error_detected = atl1c_io_error_detected,
2786	.slot_reset = atl1c_io_slot_reset,
2787	.resume = atl1c_io_resume,
2788};
2789
2790static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2791
2792static struct pci_driver atl1c_driver = {
2793	.name     = atl1c_driver_name,
2794	.id_table = atl1c_pci_tbl,
2795	.probe    = atl1c_probe,
2796	.remove   = atl1c_remove,
2797	.shutdown = atl1c_shutdown,
2798	.err_handler = &atl1c_err_handler,
2799	.driver.pm = &atl1c_pm_ops,
2800};
2801
2802module_pci_driver(atl1c_driver);
2803