drm/i915/dvo: Report LVDS attached to ch701x as connected
[~shefty/rdma-dev.git] / drivers / net / atl1c / atl1c_main.c
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 "1.0.1.0-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
33 #define L2CB_V10                        0xc0
34 #define L2CB_V11                        0xc1
35
36 /*
37  * atl1c_pci_tbl - PCI Device ID Table
38  *
39  * Wildcard entries (PCI_ANY_ID) should come last
40  * Last entry must be all 0s
41  *
42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
43  *   Class, Class Mask, private data (not used) }
44  */
45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
51         /* required last entry */
52         { 0 }
53 };
54 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
55
56 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
57 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(ATL1C_DRV_VERSION);
60
61 static int atl1c_stop_mac(struct atl1c_hw *hw);
62 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
63 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
64 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
65 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
66 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
67 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
68                    int *work_done, int work_to_do);
69 static int atl1c_up(struct atl1c_adapter *adapter);
70 static void atl1c_down(struct atl1c_adapter *adapter);
71
72 static const u16 atl1c_pay_load_size[] = {
73         128, 256, 512, 1024, 2048, 4096,
74 };
75
76 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
77 {
78         REG_MB_RFD0_PROD_IDX,
79         REG_MB_RFD1_PROD_IDX,
80         REG_MB_RFD2_PROD_IDX,
81         REG_MB_RFD3_PROD_IDX
82 };
83
84 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
85 {
86         REG_RFD0_HEAD_ADDR_LO,
87         REG_RFD1_HEAD_ADDR_LO,
88         REG_RFD2_HEAD_ADDR_LO,
89         REG_RFD3_HEAD_ADDR_LO
90 };
91
92 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
93 {
94         REG_RRD0_HEAD_ADDR_LO,
95         REG_RRD1_HEAD_ADDR_LO,
96         REG_RRD2_HEAD_ADDR_LO,
97         REG_RRD3_HEAD_ADDR_LO
98 };
99
100 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
101         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
102 static void atl1c_pcie_patch(struct atl1c_hw *hw)
103 {
104         u32 data;
105
106         AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
107         data |= PCIE_PHYMISC_FORCE_RCV_DET;
108         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
109
110         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
111                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
112
113                 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
114                         PCIE_PHYMISC2_SERDES_CDR_SHIFT);
115                 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
116                 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
117                         PCIE_PHYMISC2_SERDES_TH_SHIFT);
118                 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
119                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
120         }
121 }
122
123 /* FIXME: no need any more ? */
124 /*
125  * atl1c_init_pcie - init PCIE module
126  */
127 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
128 {
129         u32 data;
130         u32 pci_cmd;
131         struct pci_dev *pdev = hw->adapter->pdev;
132
133         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
134         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
135         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
136                 PCI_COMMAND_IO);
137         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
138
139         /*
140          * Clear any PowerSaveing Settings
141          */
142         pci_enable_wake(pdev, PCI_D3hot, 0);
143         pci_enable_wake(pdev, PCI_D3cold, 0);
144
145         /*
146          * Mask some pcie error bits
147          */
148         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
149         data &= ~PCIE_UC_SERVRITY_DLP;
150         data &= ~PCIE_UC_SERVRITY_FCP;
151         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
152
153         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
154         data &= ~LTSSM_ID_EN_WRO;
155         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
156
157         atl1c_pcie_patch(hw);
158         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
159                 atl1c_disable_l0s_l1(hw);
160         if (flag & ATL1C_PCIE_PHY_RESET)
161                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
162         else
163                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
164                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
165
166         msleep(5);
167 }
168
169 /*
170  * atl1c_irq_enable - Enable default interrupt generation settings
171  * @adapter: board private structure
172  */
173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
174 {
175         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
176                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
177                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
178                 AT_WRITE_FLUSH(&adapter->hw);
179         }
180 }
181
182 /*
183  * atl1c_irq_disable - Mask off interrupt generation on the NIC
184  * @adapter: board private structure
185  */
186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
187 {
188         atomic_inc(&adapter->irq_sem);
189         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
190         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
191         AT_WRITE_FLUSH(&adapter->hw);
192         synchronize_irq(adapter->pdev->irq);
193 }
194
195 /*
196  * atl1c_irq_reset - reset interrupt confiure on the NIC
197  * @adapter: board private structure
198  */
199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
200 {
201         atomic_set(&adapter->irq_sem, 1);
202         atl1c_irq_enable(adapter);
203 }
204
205 /*
206  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
207  * of the idle status register until the device is actually idle
208  */
209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
210 {
211         int timeout;
212         u32 data;
213
214         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
215                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
216                 if ((data & IDLE_STATUS_MASK) == 0)
217                         return 0;
218                 msleep(1);
219         }
220         return data;
221 }
222
223 /*
224  * atl1c_phy_config - Timer Call-back
225  * @data: pointer to netdev cast into an unsigned long
226  */
227 static void atl1c_phy_config(unsigned long data)
228 {
229         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
230         struct atl1c_hw *hw = &adapter->hw;
231         unsigned long flags;
232
233         spin_lock_irqsave(&adapter->mdio_lock, flags);
234         atl1c_restart_autoneg(hw);
235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
236 }
237
238 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
239 {
240         WARN_ON(in_interrupt());
241         atl1c_down(adapter);
242         atl1c_up(adapter);
243         clear_bit(__AT_RESETTING, &adapter->flags);
244 }
245
246 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
247 {
248         struct atl1c_hw *hw = &adapter->hw;
249         struct net_device *netdev = adapter->netdev;
250         struct pci_dev    *pdev   = adapter->pdev;
251         int err;
252         unsigned long flags;
253         u16 speed, duplex, phy_data;
254
255         spin_lock_irqsave(&adapter->mdio_lock, flags);
256         /* MII_BMSR must read twise */
257         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
259         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
260
261         if ((phy_data & BMSR_LSTATUS) == 0) {
262                 /* link down */
263                 hw->hibernate = true;
264                 if (atl1c_stop_mac(hw) != 0)
265                         if (netif_msg_hw(adapter))
266                                 dev_warn(&pdev->dev, "stop mac failed\n");
267                 atl1c_set_aspm(hw, false);
268                 netif_carrier_off(netdev);
269                 netif_stop_queue(netdev);
270                 atl1c_phy_reset(hw);
271                 atl1c_phy_init(&adapter->hw);
272         } else {
273                 /* Link Up */
274                 hw->hibernate = false;
275                 spin_lock_irqsave(&adapter->mdio_lock, flags);
276                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
277                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
278                 if (unlikely(err))
279                         return;
280                 /* link result is our setting */
281                 if (adapter->link_speed != speed ||
282                     adapter->link_duplex != duplex) {
283                         adapter->link_speed  = speed;
284                         adapter->link_duplex = duplex;
285                         atl1c_set_aspm(hw, true);
286                         atl1c_enable_tx_ctrl(hw);
287                         atl1c_enable_rx_ctrl(hw);
288                         atl1c_setup_mac_ctrl(adapter);
289                         if (netif_msg_link(adapter))
290                                 dev_info(&pdev->dev,
291                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
292                                         atl1c_driver_name, netdev->name,
293                                         adapter->link_speed,
294                                         adapter->link_duplex == FULL_DUPLEX ?
295                                         "Full Duplex" : "Half Duplex");
296                 }
297                 if (!netif_carrier_ok(netdev))
298                         netif_carrier_on(netdev);
299         }
300 }
301
302 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
303 {
304         struct net_device *netdev = adapter->netdev;
305         struct pci_dev    *pdev   = adapter->pdev;
306         u16 phy_data;
307         u16 link_up;
308
309         spin_lock(&adapter->mdio_lock);
310         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
312         spin_unlock(&adapter->mdio_lock);
313         link_up = phy_data & BMSR_LSTATUS;
314         /* notify upper layer link down ASAP */
315         if (!link_up) {
316                 if (netif_carrier_ok(netdev)) {
317                         /* old link state: Up */
318                         netif_carrier_off(netdev);
319                         if (netif_msg_link(adapter))
320                                 dev_info(&pdev->dev,
321                                         "%s: %s NIC Link is Down\n",
322                                         atl1c_driver_name, netdev->name);
323                         adapter->link_speed = SPEED_0;
324                 }
325         }
326
327         adapter->work_event |= ATL1C_WORK_EVENT_LINK_CHANGE;
328         schedule_work(&adapter->common_task);
329 }
330
331 static void atl1c_common_task(struct work_struct *work)
332 {
333         struct atl1c_adapter *adapter;
334         struct net_device *netdev;
335
336         adapter = container_of(work, struct atl1c_adapter, common_task);
337         netdev = adapter->netdev;
338
339         if (adapter->work_event & ATL1C_WORK_EVENT_RESET) {
340                 adapter->work_event &= ~ATL1C_WORK_EVENT_RESET;
341                 netif_device_detach(netdev);
342                 atl1c_down(adapter);
343                 atl1c_up(adapter);
344                 netif_device_attach(netdev);
345                 return;
346         }
347
348         if (adapter->work_event & ATL1C_WORK_EVENT_LINK_CHANGE) {
349                 adapter->work_event &= ~ATL1C_WORK_EVENT_LINK_CHANGE;
350                 atl1c_check_link_status(adapter);
351         }
352         return;
353 }
354
355
356 static void atl1c_del_timer(struct atl1c_adapter *adapter)
357 {
358         del_timer_sync(&adapter->phy_config_timer);
359 }
360
361
362 /*
363  * atl1c_tx_timeout - Respond to a Tx Hang
364  * @netdev: network interface device structure
365  */
366 static void atl1c_tx_timeout(struct net_device *netdev)
367 {
368         struct atl1c_adapter *adapter = netdev_priv(netdev);
369
370         /* Do the reset outside of interrupt context */
371         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
372         schedule_work(&adapter->common_task);
373 }
374
375 /*
376  * atl1c_set_multi - Multicast and Promiscuous mode set
377  * @netdev: network interface device structure
378  *
379  * The set_multi entry point is called whenever the multicast address
380  * list or the network interface flags are updated.  This routine is
381  * responsible for configuring the hardware for proper multicast,
382  * promiscuous mode, and all-multi behavior.
383  */
384 static void atl1c_set_multi(struct net_device *netdev)
385 {
386         struct atl1c_adapter *adapter = netdev_priv(netdev);
387         struct atl1c_hw *hw = &adapter->hw;
388         struct netdev_hw_addr *ha;
389         u32 mac_ctrl_data;
390         u32 hash_value;
391
392         /* Check for Promiscuous and All Multicast modes */
393         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
394
395         if (netdev->flags & IFF_PROMISC) {
396                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
397         } else if (netdev->flags & IFF_ALLMULTI) {
398                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
399                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
400         } else {
401                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
402         }
403
404         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
405
406         /* clear the old settings from the multicast hash table */
407         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
408         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
409
410         /* comoute mc addresses' hash value ,and put it into hash table */
411         netdev_for_each_mc_addr(ha, netdev) {
412                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
413                 atl1c_hash_set(hw, hash_value);
414         }
415 }
416
417 static void atl1c_vlan_rx_register(struct net_device *netdev,
418                                    struct vlan_group *grp)
419 {
420         struct atl1c_adapter *adapter = netdev_priv(netdev);
421         struct pci_dev *pdev = adapter->pdev;
422         u32 mac_ctrl_data = 0;
423
424         if (netif_msg_pktdata(adapter))
425                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
426
427         atl1c_irq_disable(adapter);
428
429         adapter->vlgrp = grp;
430         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
431
432         if (grp) {
433                 /* enable VLAN tag insert/strip */
434                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
435         } else {
436                 /* disable VLAN tag insert/strip */
437                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
438         }
439
440         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
441         atl1c_irq_enable(adapter);
442 }
443
444 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
445 {
446         struct pci_dev *pdev = adapter->pdev;
447
448         if (netif_msg_pktdata(adapter))
449                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
450         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
451 }
452 /*
453  * atl1c_set_mac - Change the Ethernet Address of the NIC
454  * @netdev: network interface device structure
455  * @p: pointer to an address structure
456  *
457  * Returns 0 on success, negative on failure
458  */
459 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
460 {
461         struct atl1c_adapter *adapter = netdev_priv(netdev);
462         struct sockaddr *addr = p;
463
464         if (!is_valid_ether_addr(addr->sa_data))
465                 return -EADDRNOTAVAIL;
466
467         if (netif_running(netdev))
468                 return -EBUSY;
469
470         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
471         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
472
473         atl1c_hw_set_mac_addr(&adapter->hw);
474
475         return 0;
476 }
477
478 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
479                                 struct net_device *dev)
480 {
481         int mtu = dev->mtu;
482
483         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
484                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
485 }
486 /*
487  * atl1c_change_mtu - Change the Maximum Transfer Unit
488  * @netdev: network interface device structure
489  * @new_mtu: new value for maximum frame size
490  *
491  * Returns 0 on success, negative on failure
492  */
493 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
494 {
495         struct atl1c_adapter *adapter = netdev_priv(netdev);
496         int old_mtu   = netdev->mtu;
497         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
498
499         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
500                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
501                 if (netif_msg_link(adapter))
502                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
503                 return -EINVAL;
504         }
505         /* set MTU */
506         if (old_mtu != new_mtu && netif_running(netdev)) {
507                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
508                         msleep(1);
509                 netdev->mtu = new_mtu;
510                 adapter->hw.max_frame_size = new_mtu;
511                 atl1c_set_rxbufsize(adapter, netdev);
512                 if (new_mtu > MAX_TSO_FRAME_SIZE) {
513                         adapter->netdev->features &= ~NETIF_F_TSO;
514                         adapter->netdev->features &= ~NETIF_F_TSO6;
515                 } else {
516                         adapter->netdev->features |= NETIF_F_TSO;
517                         adapter->netdev->features |= NETIF_F_TSO6;
518                 }
519                 atl1c_down(adapter);
520                 atl1c_up(adapter);
521                 clear_bit(__AT_RESETTING, &adapter->flags);
522                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
523                         u32 phy_data;
524
525                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
526                         phy_data |= 0x10000000;
527                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
528                 }
529
530         }
531         return 0;
532 }
533
534 /*
535  *  caller should hold mdio_lock
536  */
537 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
538 {
539         struct atl1c_adapter *adapter = netdev_priv(netdev);
540         u16 result;
541
542         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
543         return result;
544 }
545
546 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
547                              int reg_num, int val)
548 {
549         struct atl1c_adapter *adapter = netdev_priv(netdev);
550
551         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
552 }
553
554 /*
555  * atl1c_mii_ioctl -
556  * @netdev:
557  * @ifreq:
558  * @cmd:
559  */
560 static int atl1c_mii_ioctl(struct net_device *netdev,
561                            struct ifreq *ifr, int cmd)
562 {
563         struct atl1c_adapter *adapter = netdev_priv(netdev);
564         struct pci_dev *pdev = adapter->pdev;
565         struct mii_ioctl_data *data = if_mii(ifr);
566         unsigned long flags;
567         int retval = 0;
568
569         if (!netif_running(netdev))
570                 return -EINVAL;
571
572         spin_lock_irqsave(&adapter->mdio_lock, flags);
573         switch (cmd) {
574         case SIOCGMIIPHY:
575                 data->phy_id = 0;
576                 break;
577
578         case SIOCGMIIREG:
579                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
580                                     &data->val_out)) {
581                         retval = -EIO;
582                         goto out;
583                 }
584                 break;
585
586         case SIOCSMIIREG:
587                 if (data->reg_num & ~(0x1F)) {
588                         retval = -EFAULT;
589                         goto out;
590                 }
591
592                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
593                                 data->reg_num, data->val_in);
594                 if (atl1c_write_phy_reg(&adapter->hw,
595                                      data->reg_num, data->val_in)) {
596                         retval = -EIO;
597                         goto out;
598                 }
599                 break;
600
601         default:
602                 retval = -EOPNOTSUPP;
603                 break;
604         }
605 out:
606         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
607         return retval;
608 }
609
610 /*
611  * atl1c_ioctl -
612  * @netdev:
613  * @ifreq:
614  * @cmd:
615  */
616 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
617 {
618         switch (cmd) {
619         case SIOCGMIIPHY:
620         case SIOCGMIIREG:
621         case SIOCSMIIREG:
622                 return atl1c_mii_ioctl(netdev, ifr, cmd);
623         default:
624                 return -EOPNOTSUPP;
625         }
626 }
627
628 /*
629  * atl1c_alloc_queues - Allocate memory for all rings
630  * @adapter: board private structure to initialize
631  *
632  */
633 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
634 {
635         return 0;
636 }
637
638 static void atl1c_set_mac_type(struct atl1c_hw *hw)
639 {
640         switch (hw->device_id) {
641         case PCI_DEVICE_ID_ATTANSIC_L2C:
642                 hw->nic_type = athr_l2c;
643                 break;
644         case PCI_DEVICE_ID_ATTANSIC_L1C:
645                 hw->nic_type = athr_l1c;
646                 break;
647         case PCI_DEVICE_ID_ATHEROS_L2C_B:
648                 hw->nic_type = athr_l2c_b;
649                 break;
650         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
651                 hw->nic_type = athr_l2c_b2;
652                 break;
653         case PCI_DEVICE_ID_ATHEROS_L1D:
654                 hw->nic_type = athr_l1d;
655                 break;
656         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
657                 hw->nic_type = athr_l1d_2;
658                 break;
659         default:
660                 break;
661         }
662 }
663
664 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
665 {
666         u32 phy_status_data;
667         u32 link_ctrl_data;
668
669         atl1c_set_mac_type(hw);
670         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
671         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
672
673         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
674                          ATL1C_TXQ_MODE_ENHANCE;
675         if (link_ctrl_data & LINK_CTRL_L0S_EN)
676                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
677         if (link_ctrl_data & LINK_CTRL_L1_EN)
678                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
679         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
680                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
681         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
682
683         if (hw->nic_type == athr_l1c ||
684             hw->nic_type == athr_l1d ||
685             hw->nic_type == athr_l1d_2)
686                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
687         return 0;
688 }
689 /*
690  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
691  * @adapter: board private structure to initialize
692  *
693  * atl1c_sw_init initializes the Adapter private data structure.
694  * Fields are initialized based on PCI device information and
695  * OS network device settings (MTU size).
696  */
697 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
698 {
699         struct atl1c_hw *hw   = &adapter->hw;
700         struct pci_dev  *pdev = adapter->pdev;
701         u32 revision;
702
703
704         adapter->wol = 0;
705         adapter->link_speed = SPEED_0;
706         adapter->link_duplex = FULL_DUPLEX;
707         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
708         adapter->tpd_ring[0].count = 1024;
709         adapter->rfd_ring[0].count = 512;
710
711         hw->vendor_id = pdev->vendor;
712         hw->device_id = pdev->device;
713         hw->subsystem_vendor_id = pdev->subsystem_vendor;
714         hw->subsystem_id = pdev->subsystem_device;
715         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
716         hw->revision_id = revision & 0xFF;
717         /* before link up, we assume hibernate is true */
718         hw->hibernate = true;
719         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
720         if (atl1c_setup_mac_funcs(hw) != 0) {
721                 dev_err(&pdev->dev, "set mac function pointers failed\n");
722                 return -1;
723         }
724         hw->intr_mask = IMR_NORMAL_MASK;
725         hw->phy_configured = false;
726         hw->preamble_len = 7;
727         hw->max_frame_size = adapter->netdev->mtu;
728         if (adapter->num_rx_queues < 2) {
729                 hw->rss_type = atl1c_rss_disable;
730                 hw->rss_mode = atl1c_rss_mode_disable;
731         } else {
732                 hw->rss_type = atl1c_rss_ipv4;
733                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
734                 hw->rss_hash_bits = 16;
735         }
736         hw->autoneg_advertised = ADVERTISED_Autoneg;
737         hw->indirect_tab = 0xE4E4E4E4;
738         hw->base_cpu = 0;
739
740         hw->ict = 50000;                /* 100ms */
741         hw->smb_timer = 200000;         /* 400ms */
742         hw->cmb_tpd = 4;
743         hw->cmb_tx_timer = 1;           /* 2 us  */
744         hw->rx_imt = 200;
745         hw->tx_imt = 1000;
746
747         hw->tpd_burst = 5;
748         hw->rfd_burst = 8;
749         hw->dma_order = atl1c_dma_ord_out;
750         hw->dmar_block = atl1c_dma_req_1024;
751         hw->dmaw_block = atl1c_dma_req_1024;
752         hw->dmar_dly_cnt = 15;
753         hw->dmaw_dly_cnt = 4;
754
755         if (atl1c_alloc_queues(adapter)) {
756                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
757                 return -ENOMEM;
758         }
759         /* TODO */
760         atl1c_set_rxbufsize(adapter, adapter->netdev);
761         atomic_set(&adapter->irq_sem, 1);
762         spin_lock_init(&adapter->mdio_lock);
763         spin_lock_init(&adapter->tx_lock);
764         set_bit(__AT_DOWN, &adapter->flags);
765
766         return 0;
767 }
768
769 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
770                                 struct atl1c_buffer *buffer_info, int in_irq)
771 {
772         u16 pci_driection;
773         if (buffer_info->flags & ATL1C_BUFFER_FREE)
774                 return;
775         if (buffer_info->dma) {
776                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
777                         pci_driection = PCI_DMA_FROMDEVICE;
778                 else
779                         pci_driection = PCI_DMA_TODEVICE;
780
781                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
782                         pci_unmap_single(pdev, buffer_info->dma,
783                                         buffer_info->length, pci_driection);
784                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
785                         pci_unmap_page(pdev, buffer_info->dma,
786                                         buffer_info->length, pci_driection);
787         }
788         if (buffer_info->skb) {
789                 if (in_irq)
790                         dev_kfree_skb_irq(buffer_info->skb);
791                 else
792                         dev_kfree_skb(buffer_info->skb);
793         }
794         buffer_info->dma = 0;
795         buffer_info->skb = NULL;
796         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
797 }
798 /*
799  * atl1c_clean_tx_ring - Free Tx-skb
800  * @adapter: board private structure
801  */
802 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
803                                 enum atl1c_trans_queue type)
804 {
805         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
806         struct atl1c_buffer *buffer_info;
807         struct pci_dev *pdev = adapter->pdev;
808         u16 index, ring_count;
809
810         ring_count = tpd_ring->count;
811         for (index = 0; index < ring_count; index++) {
812                 buffer_info = &tpd_ring->buffer_info[index];
813                 atl1c_clean_buffer(pdev, buffer_info, 0);
814         }
815
816         /* Zero out Tx-buffers */
817         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
818                 ring_count);
819         atomic_set(&tpd_ring->next_to_clean, 0);
820         tpd_ring->next_to_use = 0;
821 }
822
823 /*
824  * atl1c_clean_rx_ring - Free rx-reservation skbs
825  * @adapter: board private structure
826  */
827 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
828 {
829         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
830         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
831         struct atl1c_buffer *buffer_info;
832         struct pci_dev *pdev = adapter->pdev;
833         int i, j;
834
835         for (i = 0; i < adapter->num_rx_queues; i++) {
836                 for (j = 0; j < rfd_ring[i].count; j++) {
837                         buffer_info = &rfd_ring[i].buffer_info[j];
838                         atl1c_clean_buffer(pdev, buffer_info, 0);
839                 }
840                 /* zero out the descriptor ring */
841                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
842                 rfd_ring[i].next_to_clean = 0;
843                 rfd_ring[i].next_to_use = 0;
844                 rrd_ring[i].next_to_use = 0;
845                 rrd_ring[i].next_to_clean = 0;
846         }
847 }
848
849 /*
850  * Read / Write Ptr Initialize:
851  */
852 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
853 {
854         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
855         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
856         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
857         struct atl1c_buffer *buffer_info;
858         int i, j;
859
860         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
861                 tpd_ring[i].next_to_use = 0;
862                 atomic_set(&tpd_ring[i].next_to_clean, 0);
863                 buffer_info = tpd_ring[i].buffer_info;
864                 for (j = 0; j < tpd_ring->count; j++)
865                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
866                                         ATL1C_BUFFER_FREE);
867         }
868         for (i = 0; i < adapter->num_rx_queues; i++) {
869                 rfd_ring[i].next_to_use = 0;
870                 rfd_ring[i].next_to_clean = 0;
871                 rrd_ring[i].next_to_use = 0;
872                 rrd_ring[i].next_to_clean = 0;
873                 for (j = 0; j < rfd_ring[i].count; j++) {
874                         buffer_info = &rfd_ring[i].buffer_info[j];
875                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
876                 }
877         }
878 }
879
880 /*
881  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
882  * @adapter: board private structure
883  *
884  * Free all transmit software resources
885  */
886 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
887 {
888         struct pci_dev *pdev = adapter->pdev;
889
890         pci_free_consistent(pdev, adapter->ring_header.size,
891                                         adapter->ring_header.desc,
892                                         adapter->ring_header.dma);
893         adapter->ring_header.desc = NULL;
894
895         /* Note: just free tdp_ring.buffer_info,
896         *  it contain rfd_ring.buffer_info, do not double free */
897         if (adapter->tpd_ring[0].buffer_info) {
898                 kfree(adapter->tpd_ring[0].buffer_info);
899                 adapter->tpd_ring[0].buffer_info = NULL;
900         }
901 }
902
903 /*
904  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
905  * @adapter: board private structure
906  *
907  * Return 0 on success, negative on failure
908  */
909 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
910 {
911         struct pci_dev *pdev = adapter->pdev;
912         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
913         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
914         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
915         struct atl1c_ring_header *ring_header = &adapter->ring_header;
916         int num_rx_queues = adapter->num_rx_queues;
917         int size;
918         int i;
919         int count = 0;
920         int rx_desc_count = 0;
921         u32 offset = 0;
922
923         rrd_ring[0].count = rfd_ring[0].count;
924         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
925                 tpd_ring[i].count = tpd_ring[0].count;
926
927         for (i = 1; i < adapter->num_rx_queues; i++)
928                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
929
930         /* 2 tpd queue, one high priority queue,
931          * another normal priority queue */
932         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
933                 rfd_ring->count * num_rx_queues);
934         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
935         if (unlikely(!tpd_ring->buffer_info)) {
936                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
937                         size);
938                 goto err_nomem;
939         }
940         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
941                 tpd_ring[i].buffer_info =
942                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
943                 count += tpd_ring[i].count;
944         }
945
946         for (i = 0; i < num_rx_queues; i++) {
947                 rfd_ring[i].buffer_info =
948                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
949                 count += rfd_ring[i].count;
950                 rx_desc_count += rfd_ring[i].count;
951         }
952         /*
953          * real ring DMA buffer
954          * each ring/block may need up to 8 bytes for alignment, hence the
955          * additional bytes tacked onto the end.
956          */
957         ring_header->size = size =
958                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
959                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
960                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
961                 sizeof(struct atl1c_hw_stats) +
962                 8 * 4 + 8 * 2 * num_rx_queues;
963
964         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
965                                 &ring_header->dma);
966         if (unlikely(!ring_header->desc)) {
967                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
968                 goto err_nomem;
969         }
970         memset(ring_header->desc, 0, ring_header->size);
971         /* init TPD ring */
972
973         tpd_ring[0].dma = roundup(ring_header->dma, 8);
974         offset = tpd_ring[0].dma - ring_header->dma;
975         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
976                 tpd_ring[i].dma = ring_header->dma + offset;
977                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
978                 tpd_ring[i].size =
979                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
980                 offset += roundup(tpd_ring[i].size, 8);
981         }
982         /* init RFD ring */
983         for (i = 0; i < num_rx_queues; i++) {
984                 rfd_ring[i].dma = ring_header->dma + offset;
985                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
986                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
987                                 rfd_ring[i].count;
988                 offset += roundup(rfd_ring[i].size, 8);
989         }
990
991         /* init RRD ring */
992         for (i = 0; i < num_rx_queues; i++) {
993                 rrd_ring[i].dma = ring_header->dma + offset;
994                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
995                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
996                                 rrd_ring[i].count;
997                 offset += roundup(rrd_ring[i].size, 8);
998         }
999
1000         adapter->smb.dma = ring_header->dma + offset;
1001         adapter->smb.smb = (u8 *)ring_header->desc + offset;
1002         return 0;
1003
1004 err_nomem:
1005         kfree(tpd_ring->buffer_info);
1006         return -ENOMEM;
1007 }
1008
1009 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1010 {
1011         struct atl1c_hw *hw = &adapter->hw;
1012         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
1013                                 adapter->rfd_ring;
1014         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
1015                                 adapter->rrd_ring;
1016         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1017                                 adapter->tpd_ring;
1018         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
1019         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
1020         int i;
1021         u32 data;
1022
1023         /* TPD */
1024         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1025                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1026                                 AT_DMA_HI_ADDR_MASK) >> 32));
1027         /* just enable normal priority TX queue */
1028         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1029                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1030                                 AT_DMA_LO_ADDR_MASK));
1031         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1032                         (u32)(tpd_ring[atl1c_trans_high].dma &
1033                                 AT_DMA_LO_ADDR_MASK));
1034         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1035                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1036
1037
1038         /* RFD */
1039         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1040                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1041         for (i = 0; i < adapter->num_rx_queues; i++)
1042                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1043                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1044
1045         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1046                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
1047         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1048                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1049
1050         /* RRD */
1051         for (i = 0; i < adapter->num_rx_queues; i++)
1052                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1053                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1054         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1055                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1056
1057         /* CMB */
1058         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1059
1060         /* SMB */
1061         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1062                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1063         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1064                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1065         if (hw->nic_type == athr_l2c_b) {
1066                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1067                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1068                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1069                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1070                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1071                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1072                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1073                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1074         }
1075         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1076                         /* Power Saving for L2c_B */
1077                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1078                 data |= SERDES_MAC_CLK_SLOWDOWN;
1079                 data |= SERDES_PYH_CLK_SLOWDOWN;
1080                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1081         }
1082         /* Load all of base address above */
1083         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1084 }
1085
1086 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1087 {
1088         struct atl1c_hw *hw = &adapter->hw;
1089         u32 dev_ctrl_data;
1090         u32 max_pay_load;
1091         u16 tx_offload_thresh;
1092         u32 txq_ctrl_data;
1093         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1094         u32 max_pay_load_data;
1095
1096         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1097         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1098         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1099                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1100         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1101         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1102                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1103         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1104         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1105                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1106         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1107
1108         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1109                         TXQ_NUM_TPD_BURST_SHIFT;
1110         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1111                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1112         max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1113                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1114         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1115                 max_pay_load_data >>= 1;
1116         txq_ctrl_data |= max_pay_load_data;
1117
1118         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1119 }
1120
1121 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1122 {
1123         struct atl1c_hw *hw = &adapter->hw;
1124         u32 rxq_ctrl_data;
1125
1126         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1127                         RXQ_RFD_BURST_NUM_SHIFT;
1128
1129         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1130                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1131         if (hw->rss_type == atl1c_rss_ipv4)
1132                 rxq_ctrl_data |= RSS_HASH_IPV4;
1133         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1134                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1135         if (hw->rss_type == atl1c_rss_ipv6)
1136                 rxq_ctrl_data |= RSS_HASH_IPV6;
1137         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1138                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1139         if (hw->rss_type != atl1c_rss_disable)
1140                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1141
1142         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1143                         RSS_MODE_SHIFT;
1144         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1145                         RSS_HASH_BITS_SHIFT;
1146         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1147                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1148                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1149
1150         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1151 }
1152
1153 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1154 {
1155         struct atl1c_hw *hw = &adapter->hw;
1156
1157         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1158         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1159 }
1160
1161 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1162 {
1163         struct atl1c_hw *hw = &adapter->hw;
1164         u32 dma_ctrl_data;
1165
1166         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1167         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1168                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1169         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1170                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1171         else
1172                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1173
1174         switch (hw->dma_order) {
1175         case atl1c_dma_ord_in:
1176                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1177                 break;
1178         case atl1c_dma_ord_enh:
1179                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1180                 break;
1181         case atl1c_dma_ord_out:
1182                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1183                 break;
1184         default:
1185                 break;
1186         }
1187
1188         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1189                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1190         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1191                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1192         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1193                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1194         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1195                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1196
1197         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1198 }
1199
1200 /*
1201  * Stop the mac, transmit and receive units
1202  * hw - Struct containing variables accessed by shared code
1203  * return : 0  or  idle status (if error)
1204  */
1205 static int atl1c_stop_mac(struct atl1c_hw *hw)
1206 {
1207         u32 data;
1208
1209         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1210         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1211                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1212         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1213
1214         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1215         data &= ~TXQ_CTRL_EN;
1216         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1217
1218         atl1c_wait_until_idle(hw);
1219
1220         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1221         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1222         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1223
1224         return (int)atl1c_wait_until_idle(hw);
1225 }
1226
1227 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1228 {
1229         u32 data;
1230
1231         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1232         switch (hw->adapter->num_rx_queues) {
1233         case 4:
1234                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1235                 break;
1236         case 3:
1237                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1238                 break;
1239         case 2:
1240                 data |= RXQ1_CTRL_EN;
1241                 break;
1242         default:
1243                 break;
1244         }
1245         data |= RXQ_CTRL_EN;
1246         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1247 }
1248
1249 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1250 {
1251         u32 data;
1252
1253         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1254         data |= TXQ_CTRL_EN;
1255         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1256 }
1257
1258 /*
1259  * Reset the transmit and receive units; mask and clear all interrupts.
1260  * hw - Struct containing variables accessed by shared code
1261  * return : 0  or  idle status (if error)
1262  */
1263 static int atl1c_reset_mac(struct atl1c_hw *hw)
1264 {
1265         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1266         struct pci_dev *pdev = adapter->pdev;
1267         u32 master_ctrl_data = 0;
1268
1269         AT_WRITE_REG(hw, REG_IMR, 0);
1270         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1271
1272         atl1c_stop_mac(hw);
1273         /*
1274          * Issue Soft Reset to the MAC.  This will reset the chip's
1275          * transmit, receive, DMA.  It will not effect
1276          * the current PCI configuration.  The global reset bit is self-
1277          * clearing, and should clear within a microsecond.
1278          */
1279         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1280         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1281         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1282                         & 0xFFFF));
1283
1284         AT_WRITE_FLUSH(hw);
1285         msleep(10);
1286         /* Wait at least 10ms for All module to be Idle */
1287
1288         if (atl1c_wait_until_idle(hw)) {
1289                 dev_err(&pdev->dev,
1290                         "MAC state machine can't be idle since"
1291                         " disabled for 10ms second\n");
1292                 return -1;
1293         }
1294         return 0;
1295 }
1296
1297 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1298 {
1299         u32 pm_ctrl_data;
1300
1301         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1302         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1303                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1304         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1305         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1306         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1307         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1308         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1309
1310         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1311         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1312         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1313         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1314 }
1315
1316 /*
1317  * Set ASPM state.
1318  * Enable/disable L0s/L1 depend on link state.
1319  */
1320 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1321 {
1322         u32 pm_ctrl_data;
1323         u32 link_ctrl_data;
1324         u32 link_l1_timer = 0xF;
1325
1326         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1327         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1328
1329         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1330         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1331                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1332         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1333                         PM_CTRL_LCKDET_TIMER_SHIFT);
1334         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1335
1336         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1337                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1338                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1339                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1340                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1341                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1342                 }
1343
1344                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1345
1346                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1347                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1348                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1349                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1350                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1351                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1352                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1353                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1354                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1355         }
1356         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1357         if (linkup) {
1358                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1359                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1360                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1361                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1362                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1363                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1364
1365                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1366                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1367                         if (hw->nic_type == athr_l2c_b)
1368                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1369                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1370                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1371                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1372                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1373                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1374                 if (hw->adapter->link_speed == SPEED_100 ||
1375                                 hw->adapter->link_speed == SPEED_1000) {
1376                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1377                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1378                                 if (hw->nic_type == athr_l2c_b)
1379                                         link_l1_timer = 7;
1380                                 else if (hw->nic_type == athr_l2c_b2 ||
1381                                         hw->nic_type == athr_l1d_2)
1382                                         link_l1_timer = 4;
1383                                 pm_ctrl_data |= link_l1_timer <<
1384                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1385                         }
1386                 } else {
1387                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1388                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1389                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1390                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1391                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1392                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1393
1394                 }
1395         } else {
1396                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1397                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1398                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1399                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1400
1401                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1402                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1403                 else
1404                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1405         }
1406         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1407
1408         return;
1409 }
1410
1411 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1412 {
1413         struct atl1c_hw *hw = &adapter->hw;
1414         struct net_device *netdev = adapter->netdev;
1415         u32 mac_ctrl_data;
1416
1417         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1418         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1419
1420         if (adapter->link_duplex == FULL_DUPLEX) {
1421                 hw->mac_duplex = true;
1422                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1423         }
1424
1425         if (adapter->link_speed == SPEED_1000)
1426                 hw->mac_speed = atl1c_mac_speed_1000;
1427         else
1428                 hw->mac_speed = atl1c_mac_speed_10_100;
1429
1430         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1431                         MAC_CTRL_SPEED_SHIFT;
1432
1433         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1434         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1435                         MAC_CTRL_PRMLEN_SHIFT);
1436
1437         if (adapter->vlgrp)
1438                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1439
1440         mac_ctrl_data |= MAC_CTRL_BC_EN;
1441         if (netdev->flags & IFF_PROMISC)
1442                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1443         if (netdev->flags & IFF_ALLMULTI)
1444                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1445
1446         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1447         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1448             hw->nic_type == athr_l1d_2) {
1449                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1450                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1451         }
1452         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1453 }
1454
1455 /*
1456  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1457  * @adapter: board private structure
1458  *
1459  * Configure the Tx /Rx unit of the MAC after a reset.
1460  */
1461 static int atl1c_configure(struct atl1c_adapter *adapter)
1462 {
1463         struct atl1c_hw *hw = &adapter->hw;
1464         u32 master_ctrl_data = 0;
1465         u32 intr_modrt_data;
1466         u32 data;
1467
1468         /* clear interrupt status */
1469         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1470         /*  Clear any WOL status */
1471         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1472         /* set Interrupt Clear Timer
1473          * HW will enable self to assert interrupt event to system after
1474          * waiting x-time for software to notify it accept interrupt.
1475          */
1476
1477         data = CLK_GATING_EN_ALL;
1478         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1479                 if (hw->nic_type == athr_l2c_b)
1480                         data &= ~CLK_GATING_RXMAC_EN;
1481         } else
1482                 data = 0;
1483         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1484
1485         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1486                 hw->ict & INT_RETRIG_TIMER_MASK);
1487
1488         atl1c_configure_des_ring(adapter);
1489
1490         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1491                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1492                                         IRQ_MODRT_TX_TIMER_SHIFT;
1493                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1494                                         IRQ_MODRT_RX_TIMER_SHIFT;
1495                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1496                 master_ctrl_data |=
1497                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1498         }
1499
1500         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1501                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1502
1503         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1504         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1505
1506         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1507                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1508                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1509                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1510                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1511         }
1512
1513         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1514                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1515                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1516         /* set MTU */
1517         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1518                         VLAN_HLEN + ETH_FCS_LEN);
1519         /* HDS, disable */
1520         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1521
1522         atl1c_configure_tx(adapter);
1523         atl1c_configure_rx(adapter);
1524         atl1c_configure_rss(adapter);
1525         atl1c_configure_dma(adapter);
1526
1527         return 0;
1528 }
1529
1530 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1531 {
1532         u16 hw_reg_addr = 0;
1533         unsigned long *stats_item = NULL;
1534         u32 data;
1535
1536         /* update rx status */
1537         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1538         stats_item  = &adapter->hw_stats.rx_ok;
1539         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1540                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1541                 *stats_item += data;
1542                 stats_item++;
1543                 hw_reg_addr += 4;
1544         }
1545 /* update tx status */
1546         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1547         stats_item  = &adapter->hw_stats.tx_ok;
1548         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1549                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1550                 *stats_item += data;
1551                 stats_item++;
1552                 hw_reg_addr += 4;
1553         }
1554 }
1555
1556 /*
1557  * atl1c_get_stats - Get System Network Statistics
1558  * @netdev: network interface device structure
1559  *
1560  * Returns the address of the device statistics structure.
1561  * The statistics are actually updated from the timer callback.
1562  */
1563 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1564 {
1565         struct atl1c_adapter *adapter = netdev_priv(netdev);
1566         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1567         struct net_device_stats *net_stats = &netdev->stats;
1568
1569         atl1c_update_hw_stats(adapter);
1570         net_stats->rx_packets = hw_stats->rx_ok;
1571         net_stats->tx_packets = hw_stats->tx_ok;
1572         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1573         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1574         net_stats->multicast  = hw_stats->rx_mcast;
1575         net_stats->collisions = hw_stats->tx_1_col +
1576                                 hw_stats->tx_2_col * 2 +
1577                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1578         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1579                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1580                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1581         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1582         net_stats->rx_length_errors = hw_stats->rx_len_err;
1583         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1584         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1585         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1586
1587         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1588
1589         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1590                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1591         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1592         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1593         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1594
1595         return net_stats;
1596 }
1597
1598 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1599 {
1600         u16 phy_data;
1601
1602         spin_lock(&adapter->mdio_lock);
1603         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1604         spin_unlock(&adapter->mdio_lock);
1605 }
1606
1607 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1608                                 enum atl1c_trans_queue type)
1609 {
1610         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1611                                 &adapter->tpd_ring[type];
1612         struct atl1c_buffer *buffer_info;
1613         struct pci_dev *pdev = adapter->pdev;
1614         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1615         u16 hw_next_to_clean;
1616         u16 shift;
1617         u32 data;
1618
1619         if (type == atl1c_trans_high)
1620                 shift = MB_HTPD_CONS_IDX_SHIFT;
1621         else
1622                 shift = MB_NTPD_CONS_IDX_SHIFT;
1623
1624         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1625         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1626
1627         while (next_to_clean != hw_next_to_clean) {
1628                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1629                 atl1c_clean_buffer(pdev, buffer_info, 1);
1630                 if (++next_to_clean == tpd_ring->count)
1631                         next_to_clean = 0;
1632                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1633         }
1634
1635         if (netif_queue_stopped(adapter->netdev) &&
1636                         netif_carrier_ok(adapter->netdev)) {
1637                 netif_wake_queue(adapter->netdev);
1638         }
1639
1640         return true;
1641 }
1642
1643 /*
1644  * atl1c_intr - Interrupt Handler
1645  * @irq: interrupt number
1646  * @data: pointer to a network interface device structure
1647  * @pt_regs: CPU registers structure
1648  */
1649 static irqreturn_t atl1c_intr(int irq, void *data)
1650 {
1651         struct net_device *netdev  = data;
1652         struct atl1c_adapter *adapter = netdev_priv(netdev);
1653         struct pci_dev *pdev = adapter->pdev;
1654         struct atl1c_hw *hw = &adapter->hw;
1655         int max_ints = AT_MAX_INT_WORK;
1656         int handled = IRQ_NONE;
1657         u32 status;
1658         u32 reg_data;
1659
1660         do {
1661                 AT_READ_REG(hw, REG_ISR, &reg_data);
1662                 status = reg_data & hw->intr_mask;
1663
1664                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1665                         if (max_ints != AT_MAX_INT_WORK)
1666                                 handled = IRQ_HANDLED;
1667                         break;
1668                 }
1669                 /* link event */
1670                 if (status & ISR_GPHY)
1671                         atl1c_clear_phy_int(adapter);
1672                 /* Ack ISR */
1673                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1674                 if (status & ISR_RX_PKT) {
1675                         if (likely(napi_schedule_prep(&adapter->napi))) {
1676                                 hw->intr_mask &= ~ISR_RX_PKT;
1677                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1678                                 __napi_schedule(&adapter->napi);
1679                         }
1680                 }
1681                 if (status & ISR_TX_PKT)
1682                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1683
1684                 handled = IRQ_HANDLED;
1685                 /* check if PCIE PHY Link down */
1686                 if (status & ISR_ERROR) {
1687                         if (netif_msg_hw(adapter))
1688                                 dev_err(&pdev->dev,
1689                                         "atl1c hardware error (status = 0x%x)\n",
1690                                         status & ISR_ERROR);
1691                         /* reset MAC */
1692                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1693                         schedule_work(&adapter->common_task);
1694                         return IRQ_HANDLED;
1695                 }
1696
1697                 if (status & ISR_OVER)
1698                         if (netif_msg_intr(adapter))
1699                                 dev_warn(&pdev->dev,
1700                                         "TX/RX overflow (status = 0x%x)\n",
1701                                         status & ISR_OVER);
1702
1703                 /* link event */
1704                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1705                         netdev->stats.tx_carrier_errors++;
1706                         atl1c_link_chg_event(adapter);
1707                         break;
1708                 }
1709
1710         } while (--max_ints > 0);
1711         /* re-enable Interrupt*/
1712         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1713         return handled;
1714 }
1715
1716 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1717                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1718 {
1719         /*
1720          * The pid field in RRS in not correct sometimes, so we
1721          * cannot figure out if the packet is fragmented or not,
1722          * so we tell the KERNEL CHECKSUM_NONE
1723          */
1724         skb_checksum_none_assert(skb);
1725 }
1726
1727 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1728 {
1729         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1730         struct pci_dev *pdev = adapter->pdev;
1731         struct atl1c_buffer *buffer_info, *next_info;
1732         struct sk_buff *skb;
1733         void *vir_addr = NULL;
1734         u16 num_alloc = 0;
1735         u16 rfd_next_to_use, next_next;
1736         struct atl1c_rx_free_desc *rfd_desc;
1737
1738         next_next = rfd_next_to_use = rfd_ring->next_to_use;
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
1744         while (next_info->flags & ATL1C_BUFFER_FREE) {
1745                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1746
1747                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1748                 if (unlikely(!skb)) {
1749                         if (netif_msg_rx_err(adapter))
1750                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1751                         break;
1752                 }
1753
1754                 /*
1755                  * Make buffer alignment 2 beyond a 16 byte boundary
1756                  * this will result in a 16 byte aligned IP header after
1757                  * the 14 byte MAC header is removed
1758                  */
1759                 vir_addr = skb->data;
1760                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1761                 buffer_info->skb = skb;
1762                 buffer_info->length = adapter->rx_buffer_len;
1763                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1764                                                 buffer_info->length,
1765                                                 PCI_DMA_FROMDEVICE);
1766                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1767                         ATL1C_PCIMAP_FROMDEVICE);
1768                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1769                 rfd_next_to_use = next_next;
1770                 if (++next_next == rfd_ring->count)
1771                         next_next = 0;
1772                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1773                 next_info = &rfd_ring->buffer_info[next_next];
1774                 num_alloc++;
1775         }
1776
1777         if (num_alloc) {
1778                 /* TODO: update mailbox here */
1779                 wmb();
1780                 rfd_ring->next_to_use = rfd_next_to_use;
1781                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1782                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1783         }
1784
1785         return num_alloc;
1786 }
1787
1788 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1789                         struct  atl1c_recv_ret_status *rrs, u16 num)
1790 {
1791         u16 i;
1792         /* the relationship between rrd and rfd is one map one */
1793         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1794                                         rrd_ring->next_to_clean)) {
1795                 rrs->word3 &= ~RRS_RXD_UPDATED;
1796                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1797                         rrd_ring->next_to_clean = 0;
1798         }
1799 }
1800
1801 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1802         struct atl1c_recv_ret_status *rrs, u16 num)
1803 {
1804         u16 i;
1805         u16 rfd_index;
1806         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1807
1808         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1809                         RRS_RX_RFD_INDEX_MASK;
1810         for (i = 0; i < num; i++) {
1811                 buffer_info[rfd_index].skb = NULL;
1812                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1813                                         ATL1C_BUFFER_FREE);
1814                 if (++rfd_index == rfd_ring->count)
1815                         rfd_index = 0;
1816         }
1817         rfd_ring->next_to_clean = rfd_index;
1818 }
1819
1820 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1821                    int *work_done, int work_to_do)
1822 {
1823         u16 rfd_num, rfd_index;
1824         u16 count = 0;
1825         u16 length;
1826         struct pci_dev *pdev = adapter->pdev;
1827         struct net_device *netdev  = adapter->netdev;
1828         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1829         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1830         struct sk_buff *skb;
1831         struct atl1c_recv_ret_status *rrs;
1832         struct atl1c_buffer *buffer_info;
1833
1834         while (1) {
1835                 if (*work_done >= work_to_do)
1836                         break;
1837                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1838                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1839                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1840                                 RRS_RX_RFD_CNT_MASK;
1841                         if (unlikely(rfd_num != 1))
1842                                 /* TODO support mul rfd*/
1843                                 if (netif_msg_rx_err(adapter))
1844                                         dev_warn(&pdev->dev,
1845                                                 "Multi rfd not support yet!\n");
1846                         goto rrs_checked;
1847                 } else {
1848                         break;
1849                 }
1850 rrs_checked:
1851                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1852                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1853                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1854                                 if (netif_msg_rx_err(adapter))
1855                                         dev_warn(&pdev->dev,
1856                                                 "wrong packet! rrs word3 is %x\n",
1857                                                 rrs->word3);
1858                         continue;
1859                 }
1860
1861                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1862                                 RRS_PKT_SIZE_MASK);
1863                 /* Good Receive */
1864                 if (likely(rfd_num == 1)) {
1865                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1866                                         RRS_RX_RFD_INDEX_MASK;
1867                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1868                         pci_unmap_single(pdev, buffer_info->dma,
1869                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1870                         skb = buffer_info->skb;
1871                 } else {
1872                         /* TODO */
1873                         if (netif_msg_rx_err(adapter))
1874                                 dev_warn(&pdev->dev,
1875                                         "Multi rfd not support yet!\n");
1876                         break;
1877                 }
1878                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1879                 skb_put(skb, length - ETH_FCS_LEN);
1880                 skb->protocol = eth_type_trans(skb, netdev);
1881                 atl1c_rx_checksum(adapter, skb, rrs);
1882                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1883                         u16 vlan;
1884
1885                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1886                         vlan = le16_to_cpu(vlan);
1887                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1888                 } else
1889                         netif_receive_skb(skb);
1890
1891                 (*work_done)++;
1892                 count++;
1893         }
1894         if (count)
1895                 atl1c_alloc_rx_buffer(adapter, que);
1896 }
1897
1898 /*
1899  * atl1c_clean - NAPI Rx polling callback
1900  * @adapter: board private structure
1901  */
1902 static int atl1c_clean(struct napi_struct *napi, int budget)
1903 {
1904         struct atl1c_adapter *adapter =
1905                         container_of(napi, struct atl1c_adapter, napi);
1906         int work_done = 0;
1907
1908         /* Keep link state information with original netdev */
1909         if (!netif_carrier_ok(adapter->netdev))
1910                 goto quit_polling;
1911         /* just enable one RXQ */
1912         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1913
1914         if (work_done < budget) {
1915 quit_polling:
1916                 napi_complete(napi);
1917                 adapter->hw.intr_mask |= ISR_RX_PKT;
1918                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1919         }
1920         return work_done;
1921 }
1922
1923 #ifdef CONFIG_NET_POLL_CONTROLLER
1924
1925 /*
1926  * Polling 'interrupt' - used by things like netconsole to send skbs
1927  * without having to re-enable interrupts. It's not called while
1928  * the interrupt routine is executing.
1929  */
1930 static void atl1c_netpoll(struct net_device *netdev)
1931 {
1932         struct atl1c_adapter *adapter = netdev_priv(netdev);
1933
1934         disable_irq(adapter->pdev->irq);
1935         atl1c_intr(adapter->pdev->irq, netdev);
1936         enable_irq(adapter->pdev->irq);
1937 }
1938 #endif
1939
1940 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1941 {
1942         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1943         u16 next_to_use = 0;
1944         u16 next_to_clean = 0;
1945
1946         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1947         next_to_use   = tpd_ring->next_to_use;
1948
1949         return (u16)(next_to_clean > next_to_use) ?
1950                 (next_to_clean - next_to_use - 1) :
1951                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1952 }
1953
1954 /*
1955  * get next usable tpd
1956  * Note: should call atl1c_tdp_avail to make sure
1957  * there is enough tpd to use
1958  */
1959 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1960         enum atl1c_trans_queue type)
1961 {
1962         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1963         struct atl1c_tpd_desc *tpd_desc;
1964         u16 next_to_use = 0;
1965
1966         next_to_use = tpd_ring->next_to_use;
1967         if (++tpd_ring->next_to_use == tpd_ring->count)
1968                 tpd_ring->next_to_use = 0;
1969         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1970         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1971         return  tpd_desc;
1972 }
1973
1974 static struct atl1c_buffer *
1975 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1976 {
1977         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1978
1979         return &tpd_ring->buffer_info[tpd -
1980                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1981 }
1982
1983 /* Calculate the transmit packet descript needed*/
1984 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1985 {
1986         u16 tpd_req;
1987         u16 proto_hdr_len = 0;
1988
1989         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1990
1991         if (skb_is_gso(skb)) {
1992                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1993                 if (proto_hdr_len < skb_headlen(skb))
1994                         tpd_req++;
1995                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1996                         tpd_req++;
1997         }
1998         return tpd_req;
1999 }
2000
2001 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2002                           struct sk_buff *skb,
2003                           struct atl1c_tpd_desc **tpd,
2004                           enum atl1c_trans_queue type)
2005 {
2006         struct pci_dev *pdev = adapter->pdev;
2007         u8 hdr_len;
2008         u32 real_len;
2009         unsigned short offload_type;
2010         int err;
2011
2012         if (skb_is_gso(skb)) {
2013                 if (skb_header_cloned(skb)) {
2014                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2015                         if (unlikely(err))
2016                                 return -1;
2017                 }
2018                 offload_type = skb_shinfo(skb)->gso_type;
2019
2020                 if (offload_type & SKB_GSO_TCPV4) {
2021                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2022                                         + ntohs(ip_hdr(skb)->tot_len));
2023
2024                         if (real_len < skb->len)
2025                                 pskb_trim(skb, real_len);
2026
2027                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2028                         if (unlikely(skb->len == hdr_len)) {
2029                                 /* only xsum need */
2030                                 if (netif_msg_tx_queued(adapter))
2031                                         dev_warn(&pdev->dev,
2032                                                 "IPV4 tso with zero data??\n");
2033                                 goto check_sum;
2034                         } else {
2035                                 ip_hdr(skb)->check = 0;
2036                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2037                                                         ip_hdr(skb)->saddr,
2038                                                         ip_hdr(skb)->daddr,
2039                                                         0, IPPROTO_TCP, 0);
2040                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2041                         }
2042                 }
2043
2044                 if (offload_type & SKB_GSO_TCPV6) {
2045                         struct atl1c_tpd_ext_desc *etpd =
2046                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2047
2048                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2049                         *tpd = atl1c_get_tpd(adapter, type);
2050                         ipv6_hdr(skb)->payload_len = 0;
2051                         /* check payload == 0 byte ? */
2052                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2053                         if (unlikely(skb->len == hdr_len)) {
2054                                 /* only xsum need */
2055                                 if (netif_msg_tx_queued(adapter))
2056                                         dev_warn(&pdev->dev,
2057                                                 "IPV6 tso with zero data??\n");
2058                                 goto check_sum;
2059                         } else
2060                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2061                                                 &ipv6_hdr(skb)->saddr,
2062                                                 &ipv6_hdr(skb)->daddr,
2063                                                 0, IPPROTO_TCP, 0);
2064                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2065                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2066                         etpd->pkt_len = cpu_to_le32(skb->len);
2067                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2068                 }
2069
2070                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2071                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2072                                 TPD_TCPHDR_OFFSET_SHIFT;
2073                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2074                                 TPD_MSS_SHIFT;
2075                 return 0;
2076         }
2077
2078 check_sum:
2079         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2080                 u8 css, cso;
2081                 cso = skb_transport_offset(skb);
2082
2083                 if (unlikely(cso & 0x1)) {
2084                         if (netif_msg_tx_err(adapter))
2085                                 dev_err(&adapter->pdev->dev,
2086                                         "payload offset should not an event number\n");
2087                         return -1;
2088                 } else {
2089                         css = cso + skb->csum_offset;
2090
2091                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2092                                         TPD_PLOADOFFSET_SHIFT;
2093                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2094                                         TPD_CCSUM_OFFSET_SHIFT;
2095                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2096                 }
2097         }
2098         return 0;
2099 }
2100
2101 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2102                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2103                         enum atl1c_trans_queue type)
2104 {
2105         struct atl1c_tpd_desc *use_tpd = NULL;
2106         struct atl1c_buffer *buffer_info = NULL;
2107         u16 buf_len = skb_headlen(skb);
2108         u16 map_len = 0;
2109         u16 mapped_len = 0;
2110         u16 hdr_len = 0;
2111         u16 nr_frags;
2112         u16 f;
2113         int tso;
2114
2115         nr_frags = skb_shinfo(skb)->nr_frags;
2116         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2117         if (tso) {
2118                 /* TSO */
2119                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2120                 use_tpd = tpd;
2121
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                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2127                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2128                         ATL1C_PCIMAP_TODEVICE);
2129                 mapped_len += map_len;
2130                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2131                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2132         }
2133
2134         if (mapped_len < buf_len) {
2135                 /* mapped_len == 0, means we should use the first tpd,
2136                    which is given by caller  */
2137                 if (mapped_len == 0)
2138                         use_tpd = tpd;
2139                 else {
2140                         use_tpd = atl1c_get_tpd(adapter, type);
2141                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2142                 }
2143                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2144                 buffer_info->length = buf_len - mapped_len;
2145                 buffer_info->dma =
2146                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2147                                         buffer_info->length, PCI_DMA_TODEVICE);
2148                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2149                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2150                         ATL1C_PCIMAP_TODEVICE);
2151                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2152                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2153         }
2154
2155         for (f = 0; f < nr_frags; f++) {
2156                 struct skb_frag_struct *frag;
2157
2158                 frag = &skb_shinfo(skb)->frags[f];
2159
2160                 use_tpd = atl1c_get_tpd(adapter, type);
2161                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2162
2163                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2164                 buffer_info->length = frag->size;
2165                 buffer_info->dma =
2166                         pci_map_page(adapter->pdev, frag->page,
2167                                         frag->page_offset,
2168                                         buffer_info->length,
2169                                         PCI_DMA_TODEVICE);
2170                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2171                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2172                         ATL1C_PCIMAP_TODEVICE);
2173                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2174                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2175         }
2176
2177         /* The last tpd */
2178         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2179         /* The last buffer info contain the skb address,
2180            so it will be free after unmap */
2181         buffer_info->skb = skb;
2182 }
2183
2184 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2185                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2186 {
2187         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2188         u32 prod_data;
2189
2190         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2191         switch (type) {
2192         case atl1c_trans_high:
2193                 prod_data &= 0xFFFF0000;
2194                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2195                 break;
2196         case atl1c_trans_normal:
2197                 prod_data &= 0x0000FFFF;
2198                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2199                 break;
2200         default:
2201                 break;
2202         }
2203         wmb();
2204         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2205 }
2206
2207 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2208                                           struct net_device *netdev)
2209 {
2210         struct atl1c_adapter *adapter = netdev_priv(netdev);
2211         unsigned long flags;
2212         u16 tpd_req = 1;
2213         struct atl1c_tpd_desc *tpd;
2214         enum atl1c_trans_queue type = atl1c_trans_normal;
2215
2216         if (test_bit(__AT_DOWN, &adapter->flags)) {
2217                 dev_kfree_skb_any(skb);
2218                 return NETDEV_TX_OK;
2219         }
2220
2221         tpd_req = atl1c_cal_tpd_req(skb);
2222         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2223                 if (netif_msg_pktdata(adapter))
2224                         dev_info(&adapter->pdev->dev, "tx locked\n");
2225                 return NETDEV_TX_LOCKED;
2226         }
2227         if (skb->mark == 0x01)
2228                 type = atl1c_trans_high;
2229         else
2230                 type = atl1c_trans_normal;
2231
2232         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2233                 /* no enough descriptor, just stop queue */
2234                 netif_stop_queue(netdev);
2235                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2236                 return NETDEV_TX_BUSY;
2237         }
2238
2239         tpd = atl1c_get_tpd(adapter, type);
2240
2241         /* do TSO and check sum */
2242         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2243                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2244                 dev_kfree_skb_any(skb);
2245                 return NETDEV_TX_OK;
2246         }
2247
2248         if (unlikely(vlan_tx_tag_present(skb))) {
2249                 u16 vlan = vlan_tx_tag_get(skb);
2250                 __le16 tag;
2251
2252                 vlan = cpu_to_le16(vlan);
2253                 AT_VLAN_TO_TAG(vlan, tag);
2254                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2255                 tpd->vlan_tag = tag;
2256         }
2257
2258         if (skb_network_offset(skb) != ETH_HLEN)
2259                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2260
2261         atl1c_tx_map(adapter, skb, tpd, type);
2262         atl1c_tx_queue(adapter, skb, tpd, type);
2263
2264         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2265         return NETDEV_TX_OK;
2266 }
2267
2268 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2269 {
2270         struct net_device *netdev = adapter->netdev;
2271
2272         free_irq(adapter->pdev->irq, netdev);
2273
2274         if (adapter->have_msi)
2275                 pci_disable_msi(adapter->pdev);
2276 }
2277
2278 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2279 {
2280         struct pci_dev    *pdev   = adapter->pdev;
2281         struct net_device *netdev = adapter->netdev;
2282         int flags = 0;
2283         int err = 0;
2284
2285         adapter->have_msi = true;
2286         err = pci_enable_msi(adapter->pdev);
2287         if (err) {
2288                 if (netif_msg_ifup(adapter))
2289                         dev_err(&pdev->dev,
2290                                 "Unable to allocate MSI interrupt Error: %d\n",
2291                                 err);
2292                 adapter->have_msi = false;
2293         } else
2294                 netdev->irq = pdev->irq;
2295
2296         if (!adapter->have_msi)
2297                 flags |= IRQF_SHARED;
2298         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2299                         netdev->name, netdev);
2300         if (err) {
2301                 if (netif_msg_ifup(adapter))
2302                         dev_err(&pdev->dev,
2303                                 "Unable to allocate interrupt Error: %d\n",
2304                                 err);
2305                 if (adapter->have_msi)
2306                         pci_disable_msi(adapter->pdev);
2307                 return err;
2308         }
2309         if (netif_msg_ifup(adapter))
2310                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2311         return err;
2312 }
2313
2314 static int atl1c_up(struct atl1c_adapter *adapter)
2315 {
2316         struct net_device *netdev = adapter->netdev;
2317         int num;
2318         int err;
2319         int i;
2320
2321         netif_carrier_off(netdev);
2322         atl1c_init_ring_ptrs(adapter);
2323         atl1c_set_multi(netdev);
2324         atl1c_restore_vlan(adapter);
2325
2326         for (i = 0; i < adapter->num_rx_queues; i++) {
2327                 num = atl1c_alloc_rx_buffer(adapter, i);
2328                 if (unlikely(num == 0)) {
2329                         err = -ENOMEM;
2330                         goto err_alloc_rx;
2331                 }
2332         }
2333
2334         if (atl1c_configure(adapter)) {
2335                 err = -EIO;
2336                 goto err_up;
2337         }
2338
2339         err = atl1c_request_irq(adapter);
2340         if (unlikely(err))
2341                 goto err_up;
2342
2343         clear_bit(__AT_DOWN, &adapter->flags);
2344         napi_enable(&adapter->napi);
2345         atl1c_irq_enable(adapter);
2346         atl1c_check_link_status(adapter);
2347         netif_start_queue(netdev);
2348         return err;
2349
2350 err_up:
2351 err_alloc_rx:
2352         atl1c_clean_rx_ring(adapter);
2353         return err;
2354 }
2355
2356 static void atl1c_down(struct atl1c_adapter *adapter)
2357 {
2358         struct net_device *netdev = adapter->netdev;
2359
2360         atl1c_del_timer(adapter);
2361         adapter->work_event = 0; /* clear all event */
2362         /* signal that we're down so the interrupt handler does not
2363          * reschedule our watchdog timer */
2364         set_bit(__AT_DOWN, &adapter->flags);
2365         netif_carrier_off(netdev);
2366         napi_disable(&adapter->napi);
2367         atl1c_irq_disable(adapter);
2368         atl1c_free_irq(adapter);
2369         /* reset MAC to disable all RX/TX */
2370         atl1c_reset_mac(&adapter->hw);
2371         msleep(1);
2372
2373         adapter->link_speed = SPEED_0;
2374         adapter->link_duplex = -1;
2375         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2376         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2377         atl1c_clean_rx_ring(adapter);
2378 }
2379
2380 /*
2381  * atl1c_open - Called when a network interface is made active
2382  * @netdev: network interface device structure
2383  *
2384  * Returns 0 on success, negative value on failure
2385  *
2386  * The open entry point is called when a network interface is made
2387  * active by the system (IFF_UP).  At this point all resources needed
2388  * for transmit and receive operations are allocated, the interrupt
2389  * handler is registered with the OS, the watchdog timer is started,
2390  * and the stack is notified that the interface is ready.
2391  */
2392 static int atl1c_open(struct net_device *netdev)
2393 {
2394         struct atl1c_adapter *adapter = netdev_priv(netdev);
2395         int err;
2396
2397         /* disallow open during test */
2398         if (test_bit(__AT_TESTING, &adapter->flags))
2399                 return -EBUSY;
2400
2401         /* allocate rx/tx dma buffer & descriptors */
2402         err = atl1c_setup_ring_resources(adapter);
2403         if (unlikely(err))
2404                 return err;
2405
2406         err = atl1c_up(adapter);
2407         if (unlikely(err))
2408                 goto err_up;
2409
2410         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2411                 u32 phy_data;
2412
2413                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2414                 phy_data |= MDIO_AP_EN;
2415                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2416         }
2417         return 0;
2418
2419 err_up:
2420         atl1c_free_irq(adapter);
2421         atl1c_free_ring_resources(adapter);
2422         atl1c_reset_mac(&adapter->hw);
2423         return err;
2424 }
2425
2426 /*
2427  * atl1c_close - Disables a network interface
2428  * @netdev: network interface device structure
2429  *
2430  * Returns 0, this is not allowed to fail
2431  *
2432  * The close entry point is called when an interface is de-activated
2433  * by the OS.  The hardware is still under the drivers control, but
2434  * needs to be disabled.  A global MAC reset is issued to stop the
2435  * hardware, and all transmit and receive resources are freed.
2436  */
2437 static int atl1c_close(struct net_device *netdev)
2438 {
2439         struct atl1c_adapter *adapter = netdev_priv(netdev);
2440
2441         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2442         atl1c_down(adapter);
2443         atl1c_free_ring_resources(adapter);
2444         return 0;
2445 }
2446
2447 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2448 {
2449         struct net_device *netdev = pci_get_drvdata(pdev);
2450         struct atl1c_adapter *adapter = netdev_priv(netdev);
2451         struct atl1c_hw *hw = &adapter->hw;
2452         u32 mac_ctrl_data = 0;
2453         u32 master_ctrl_data = 0;
2454         u32 wol_ctrl_data = 0;
2455         u16 mii_intr_status_data = 0;
2456         u32 wufc = adapter->wol;
2457         int retval = 0;
2458
2459         atl1c_disable_l0s_l1(hw);
2460         if (netif_running(netdev)) {
2461                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2462                 atl1c_down(adapter);
2463         }
2464         netif_device_detach(netdev);
2465         retval = pci_save_state(pdev);
2466         if (retval)
2467                 return retval;
2468
2469         if (wufc)
2470                 if (atl1c_phy_power_saving(hw) != 0)
2471                         dev_dbg(&pdev->dev, "phy power saving failed");
2472
2473         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2474         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2475
2476         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2477         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2478         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2479                         MAC_CTRL_PRMLEN_MASK) <<
2480                         MAC_CTRL_PRMLEN_SHIFT);
2481         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2482         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2483
2484         if (wufc) {
2485                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2486                 if (adapter->link_speed == SPEED_1000 ||
2487                         adapter->link_speed == SPEED_0) {
2488                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2489                                         MAC_CTRL_SPEED_SHIFT;
2490                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2491                 } else
2492                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2493                                         MAC_CTRL_SPEED_SHIFT;
2494
2495                 if (adapter->link_duplex == DUPLEX_FULL)
2496                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2497
2498                 /* turn on magic packet wol */
2499                 if (wufc & AT_WUFC_MAG)
2500                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2501
2502                 if (wufc & AT_WUFC_LNKC) {
2503                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2504                         /* only link up can wake up */
2505                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2506                                 dev_dbg(&pdev->dev, "%s: read write phy "
2507                                                   "register failed.\n",
2508                                                   atl1c_driver_name);
2509                         }
2510                 }
2511                 /* clear phy interrupt */
2512                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2513                 /* Config MAC Ctrl register */
2514                 if (adapter->vlgrp)
2515                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2516
2517                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2518                 if (wufc & AT_WUFC_MAG)
2519                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2520
2521                 dev_dbg(&pdev->dev,
2522                         "%s: suspend MAC=0x%x\n",
2523                         atl1c_driver_name, mac_ctrl_data);
2524                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2525                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2526                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2527
2528                 /* pcie patch */
2529                 device_set_wakeup_enable(&pdev->dev, 1);
2530
2531                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2532                         GPHY_CTRL_EXT_RESET);
2533                 pci_prepare_to_sleep(pdev);
2534         } else {
2535                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2536                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2537                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2538                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2539                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2540                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2541                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2542                 hw->phy_configured = false; /* re-init PHY when resume */
2543                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2544         }
2545
2546         pci_disable_device(pdev);
2547         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2548
2549         return 0;
2550 }
2551
2552 static int atl1c_resume(struct pci_dev *pdev)
2553 {
2554         struct net_device *netdev = pci_get_drvdata(pdev);
2555         struct atl1c_adapter *adapter = netdev_priv(netdev);
2556
2557         pci_set_power_state(pdev, PCI_D0);
2558         pci_restore_state(pdev);
2559         pci_enable_wake(pdev, PCI_D3hot, 0);
2560         pci_enable_wake(pdev, PCI_D3cold, 0);
2561
2562         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2563         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2564                         ATL1C_PCIE_PHY_RESET);
2565
2566         atl1c_phy_reset(&adapter->hw);
2567         atl1c_reset_mac(&adapter->hw);
2568         atl1c_phy_init(&adapter->hw);
2569
2570 #if 0
2571         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2572         pm_data &= ~PM_CTRLSTAT_PME_EN;
2573         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2574 #endif
2575
2576         netif_device_attach(netdev);
2577         if (netif_running(netdev))
2578                 atl1c_up(adapter);
2579
2580         return 0;
2581 }
2582
2583 static void atl1c_shutdown(struct pci_dev *pdev)
2584 {
2585         atl1c_suspend(pdev, PMSG_SUSPEND);
2586 }
2587
2588 static const struct net_device_ops atl1c_netdev_ops = {
2589         .ndo_open               = atl1c_open,
2590         .ndo_stop               = atl1c_close,
2591         .ndo_validate_addr      = eth_validate_addr,
2592         .ndo_start_xmit         = atl1c_xmit_frame,
2593         .ndo_set_mac_address    = atl1c_set_mac_addr,
2594         .ndo_set_multicast_list = atl1c_set_multi,
2595         .ndo_change_mtu         = atl1c_change_mtu,
2596         .ndo_do_ioctl           = atl1c_ioctl,
2597         .ndo_tx_timeout         = atl1c_tx_timeout,
2598         .ndo_get_stats          = atl1c_get_stats,
2599         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2600 #ifdef CONFIG_NET_POLL_CONTROLLER
2601         .ndo_poll_controller    = atl1c_netpoll,
2602 #endif
2603 };
2604
2605 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2606 {
2607         SET_NETDEV_DEV(netdev, &pdev->dev);
2608         pci_set_drvdata(pdev, netdev);
2609
2610         netdev->irq  = pdev->irq;
2611         netdev->netdev_ops = &atl1c_netdev_ops;
2612         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2613         atl1c_set_ethtool_ops(netdev);
2614
2615         /* TODO: add when ready */
2616         netdev->features =      NETIF_F_SG         |
2617                                 NETIF_F_HW_CSUM    |
2618                                 NETIF_F_HW_VLAN_TX |
2619                                 NETIF_F_HW_VLAN_RX |
2620                                 NETIF_F_TSO        |
2621                                 NETIF_F_TSO6;
2622         return 0;
2623 }
2624
2625 /*
2626  * atl1c_probe - Device Initialization Routine
2627  * @pdev: PCI device information struct
2628  * @ent: entry in atl1c_pci_tbl
2629  *
2630  * Returns 0 on success, negative on failure
2631  *
2632  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2633  * The OS initialization, configuring of the adapter private structure,
2634  * and a hardware reset occur.
2635  */
2636 static int __devinit atl1c_probe(struct pci_dev *pdev,
2637                                  const struct pci_device_id *ent)
2638 {
2639         struct net_device *netdev;
2640         struct atl1c_adapter *adapter;
2641         static int cards_found;
2642
2643         int err = 0;
2644
2645         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2646         err = pci_enable_device_mem(pdev);
2647         if (err) {
2648                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2649                 return err;
2650         }
2651
2652         /*
2653          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2654          * shared register for the high 32 bits, so only a single, aligned,
2655          * 4 GB physical address range can be used at a time.
2656          *
2657          * Supporting 64-bit DMA on this hardware is more trouble than it's
2658          * worth.  It is far easier to limit to 32-bit DMA than update
2659          * various kernel subsystems to support the mechanics required by a
2660          * fixed-high-32-bit system.
2661          */
2662         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2663             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2664                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2665                 goto err_dma;
2666         }
2667
2668         err = pci_request_regions(pdev, atl1c_driver_name);
2669         if (err) {
2670                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2671                 goto err_pci_reg;
2672         }
2673
2674         pci_set_master(pdev);
2675
2676         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2677         if (netdev == NULL) {
2678                 err = -ENOMEM;
2679                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2680                 goto err_alloc_etherdev;
2681         }
2682
2683         err = atl1c_init_netdev(netdev, pdev);
2684         if (err) {
2685                 dev_err(&pdev->dev, "init netdevice failed\n");
2686                 goto err_init_netdev;
2687         }
2688         adapter = netdev_priv(netdev);
2689         adapter->bd_number = cards_found;
2690         adapter->netdev = netdev;
2691         adapter->pdev = pdev;
2692         adapter->hw.adapter = adapter;
2693         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2694         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2695         if (!adapter->hw.hw_addr) {
2696                 err = -EIO;
2697                 dev_err(&pdev->dev, "cannot map device registers\n");
2698                 goto err_ioremap;
2699         }
2700         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2701
2702         /* init mii data */
2703         adapter->mii.dev = netdev;
2704         adapter->mii.mdio_read  = atl1c_mdio_read;
2705         adapter->mii.mdio_write = atl1c_mdio_write;
2706         adapter->mii.phy_id_mask = 0x1f;
2707         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2708         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2709         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2710                         (unsigned long)adapter);
2711         /* setup the private structure */
2712         err = atl1c_sw_init(adapter);
2713         if (err) {
2714                 dev_err(&pdev->dev, "net device private data init failed\n");
2715                 goto err_sw_init;
2716         }
2717         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2718                         ATL1C_PCIE_PHY_RESET);
2719
2720         /* Init GPHY as early as possible due to power saving issue  */
2721         atl1c_phy_reset(&adapter->hw);
2722
2723         err = atl1c_reset_mac(&adapter->hw);
2724         if (err) {
2725                 err = -EIO;
2726                 goto err_reset;
2727         }
2728
2729         device_init_wakeup(&pdev->dev, 1);
2730         /* reset the controller to
2731          * put the device in a known good starting state */
2732         err = atl1c_phy_init(&adapter->hw);
2733         if (err) {
2734                 err = -EIO;
2735                 goto err_reset;
2736         }
2737         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2738                 err = -EIO;
2739                 dev_err(&pdev->dev, "get mac address failed\n");
2740                 goto err_eeprom;
2741         }
2742         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2743         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2744         if (netif_msg_probe(adapter))
2745                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2746                         adapter->hw.mac_addr);
2747
2748         atl1c_hw_set_mac_addr(&adapter->hw);
2749         INIT_WORK(&adapter->common_task, atl1c_common_task);
2750         adapter->work_event = 0;
2751         err = register_netdev(netdev);
2752         if (err) {
2753                 dev_err(&pdev->dev, "register netdevice failed\n");
2754                 goto err_register;
2755         }
2756
2757         if (netif_msg_probe(adapter))
2758                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2759         cards_found++;
2760         return 0;
2761
2762 err_reset:
2763 err_register:
2764 err_sw_init:
2765 err_eeprom:
2766         iounmap(adapter->hw.hw_addr);
2767 err_init_netdev:
2768 err_ioremap:
2769         free_netdev(netdev);
2770 err_alloc_etherdev:
2771         pci_release_regions(pdev);
2772 err_pci_reg:
2773 err_dma:
2774         pci_disable_device(pdev);
2775         return err;
2776 }
2777
2778 /*
2779  * atl1c_remove - Device Removal Routine
2780  * @pdev: PCI device information struct
2781  *
2782  * atl1c_remove is called by the PCI subsystem to alert the driver
2783  * that it should release a PCI device.  The could be caused by a
2784  * Hot-Plug event, or because the driver is going to be removed from
2785  * memory.
2786  */
2787 static void __devexit atl1c_remove(struct pci_dev *pdev)
2788 {
2789         struct net_device *netdev = pci_get_drvdata(pdev);
2790         struct atl1c_adapter *adapter = netdev_priv(netdev);
2791
2792         unregister_netdev(netdev);
2793         atl1c_phy_disable(&adapter->hw);
2794
2795         iounmap(adapter->hw.hw_addr);
2796
2797         pci_release_regions(pdev);
2798         pci_disable_device(pdev);
2799         free_netdev(netdev);
2800 }
2801
2802 /*
2803  * atl1c_io_error_detected - called when PCI error is detected
2804  * @pdev: Pointer to PCI device
2805  * @state: The current pci connection state
2806  *
2807  * This function is called after a PCI bus error affecting
2808  * this device has been detected.
2809  */
2810 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2811                                                 pci_channel_state_t state)
2812 {
2813         struct net_device *netdev = pci_get_drvdata(pdev);
2814         struct atl1c_adapter *adapter = netdev_priv(netdev);
2815
2816         netif_device_detach(netdev);
2817
2818         if (state == pci_channel_io_perm_failure)
2819                 return PCI_ERS_RESULT_DISCONNECT;
2820
2821         if (netif_running(netdev))
2822                 atl1c_down(adapter);
2823
2824         pci_disable_device(pdev);
2825
2826         /* Request a slot slot reset. */
2827         return PCI_ERS_RESULT_NEED_RESET;
2828 }
2829
2830 /*
2831  * atl1c_io_slot_reset - called after the pci bus has been reset.
2832  * @pdev: Pointer to PCI device
2833  *
2834  * Restart the card from scratch, as if from a cold-boot. Implementation
2835  * resembles the first-half of the e1000_resume routine.
2836  */
2837 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2838 {
2839         struct net_device *netdev = pci_get_drvdata(pdev);
2840         struct atl1c_adapter *adapter = netdev_priv(netdev);
2841
2842         if (pci_enable_device(pdev)) {
2843                 if (netif_msg_hw(adapter))
2844                         dev_err(&pdev->dev,
2845                                 "Cannot re-enable PCI device after reset\n");
2846                 return PCI_ERS_RESULT_DISCONNECT;
2847         }
2848         pci_set_master(pdev);
2849
2850         pci_enable_wake(pdev, PCI_D3hot, 0);
2851         pci_enable_wake(pdev, PCI_D3cold, 0);
2852
2853         atl1c_reset_mac(&adapter->hw);
2854
2855         return PCI_ERS_RESULT_RECOVERED;
2856 }
2857
2858 /*
2859  * atl1c_io_resume - called when traffic can start flowing again.
2860  * @pdev: Pointer to PCI device
2861  *
2862  * This callback is called when the error recovery driver tells us that
2863  * its OK to resume normal operation. Implementation resembles the
2864  * second-half of the atl1c_resume routine.
2865  */
2866 static void atl1c_io_resume(struct pci_dev *pdev)
2867 {
2868         struct net_device *netdev = pci_get_drvdata(pdev);
2869         struct atl1c_adapter *adapter = netdev_priv(netdev);
2870
2871         if (netif_running(netdev)) {
2872                 if (atl1c_up(adapter)) {
2873                         if (netif_msg_hw(adapter))
2874                                 dev_err(&pdev->dev,
2875                                         "Cannot bring device back up after reset\n");
2876                         return;
2877                 }
2878         }
2879
2880         netif_device_attach(netdev);
2881 }
2882
2883 static struct pci_error_handlers atl1c_err_handler = {
2884         .error_detected = atl1c_io_error_detected,
2885         .slot_reset = atl1c_io_slot_reset,
2886         .resume = atl1c_io_resume,
2887 };
2888
2889 static struct pci_driver atl1c_driver = {
2890         .name     = atl1c_driver_name,
2891         .id_table = atl1c_pci_tbl,
2892         .probe    = atl1c_probe,
2893         .remove   = __devexit_p(atl1c_remove),
2894         /* Power Managment Hooks */
2895         .suspend  = atl1c_suspend,
2896         .resume   = atl1c_resume,
2897         .shutdown = atl1c_shutdown,
2898         .err_handler = &atl1c_err_handler
2899 };
2900
2901 /*
2902  * atl1c_init_module - Driver Registration Routine
2903  *
2904  * atl1c_init_module is the first routine called when the driver is
2905  * loaded. All it does is register with the PCI subsystem.
2906  */
2907 static int __init atl1c_init_module(void)
2908 {
2909         return pci_register_driver(&atl1c_driver);
2910 }
2911
2912 /*
2913  * atl1c_exit_module - Driver Exit Cleanup Routine
2914  *
2915  * atl1c_exit_module is called just before the driver is removed
2916  * from memory.
2917  */
2918 static void __exit atl1c_exit_module(void)
2919 {
2920         pci_unregister_driver(&atl1c_driver);
2921 }
2922
2923 module_init(atl1c_init_module);
2924 module_exit(atl1c_exit_module);