1 /*
2 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
3 *
4 * Derived from Intel e1000 driver
5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59
19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22 #include "atl1c.h"
23
24 #define ATL1C_DRV_VERSION "1.0.1.1-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27
28 /*
29 * atl1c_pci_tbl - PCI Device ID Table
30 *
31 * Wildcard entries (PCI_ANY_ID) should come last
32 * Last entry must be all 0s
33 *
34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
35 * Class, Class Mask, private data (not used) }
36 */
37 static const struct pci_device_id atl1c_pci_tbl[] = {
38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
44 /* required last entry */
45 { 0 }
46 };
47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
48
49 MODULE_AUTHOR("Jie Yang");
50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
51 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_VERSION(ATL1C_DRV_VERSION);
54
55 static int atl1c_stop_mac(struct atl1c_hw *hw);
56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
60 int *work_done, int work_to_do);
61 static int atl1c_up(struct atl1c_adapter *adapter);
62 static void atl1c_down(struct atl1c_adapter *adapter);
63 static int atl1c_reset_mac(struct atl1c_hw *hw);
64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
65 static int atl1c_configure(struct atl1c_adapter *adapter);
66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
67
68 static const u16 atl1c_pay_load_size[] = {
69 128, 256, 512, 1024, 2048, 4096,
70 };
71
72
73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
74 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
atl1c_pcie_patch(struct atl1c_hw * hw)75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
76 {
77 u32 mst_data, data;
78
79 /* pclk sel could switch to 25M */
80 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
81 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
82 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
83
84 /* WoL/PCIE related settings */
85 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
86 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
87 data |= PCIE_PHYMISC_FORCE_RCV_DET;
88 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
89 } else { /* new dev set bit5 of MASTER */
90 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
91 AT_WRITE_REG(hw, REG_MASTER_CTRL,
92 mst_data | MASTER_CTRL_WAKEN_25M);
93 }
94 /* aspm/PCIE setting only for l2cb 1.0 */
95 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
96 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
97 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
98 L2CB1_PCIE_PHYMISC2_CDR_BW);
99 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
100 L2CB1_PCIE_PHYMISC2_L0S_TH);
101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
102 /* extend L1 sync timer */
103 AT_READ_REG(hw, REG_LINK_CTRL, &data);
104 data |= LINK_CTRL_EXT_SYNC;
105 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
106 }
107 /* l2cb 1.x & l1d 1.x */
108 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
109 AT_READ_REG(hw, REG_PM_CTRL, &data);
110 data |= PM_CTRL_L0S_BUFSRX_EN;
111 AT_WRITE_REG(hw, REG_PM_CTRL, data);
112 /* clear vendor msg */
113 AT_READ_REG(hw, REG_DMA_DBG, &data);
114 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
115 }
116 }
117
118 /* FIXME: no need any more ? */
119 /*
120 * atl1c_init_pcie - init PCIE module
121 */
atl1c_reset_pcie(struct atl1c_hw * hw,u32 flag)122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
123 {
124 u32 data;
125 u32 pci_cmd;
126 struct pci_dev *pdev = hw->adapter->pdev;
127 int pos;
128
129 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
130 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
131 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
132 PCI_COMMAND_IO);
133 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
134
135 /*
136 * Clear any PowerSaveing Settings
137 */
138 pci_enable_wake(pdev, PCI_D3hot, 0);
139 pci_enable_wake(pdev, PCI_D3cold, 0);
140 /* wol sts read-clear */
141 AT_READ_REG(hw, REG_WOL_CTRL, &data);
142 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
143
144 /*
145 * Mask some pcie error bits
146 */
147 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
148 if (pos) {
149 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
150 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
151 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
152 }
153 /* clear error status */
154 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
155 PCI_EXP_DEVSTA_NFED |
156 PCI_EXP_DEVSTA_FED |
157 PCI_EXP_DEVSTA_CED |
158 PCI_EXP_DEVSTA_URD);
159
160 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
161 data &= ~LTSSM_ID_EN_WRO;
162 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
163
164 atl1c_pcie_patch(hw);
165 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
166 atl1c_disable_l0s_l1(hw);
167
168 msleep(5);
169 }
170
171 /**
172 * atl1c_irq_enable - Enable default interrupt generation settings
173 * @adapter: board private structure
174 */
atl1c_irq_enable(struct atl1c_adapter * adapter)175 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
176 {
177 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
178 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
179 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
180 AT_WRITE_FLUSH(&adapter->hw);
181 }
182 }
183
184 /**
185 * atl1c_irq_disable - Mask off interrupt generation on the NIC
186 * @adapter: board private structure
187 */
atl1c_irq_disable(struct atl1c_adapter * adapter)188 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
189 {
190 atomic_inc(&adapter->irq_sem);
191 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
192 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
193 AT_WRITE_FLUSH(&adapter->hw);
194 synchronize_irq(adapter->pdev->irq);
195 }
196
197 /**
198 * atl1c_irq_reset - reset interrupt confiure on the NIC
199 * @adapter: board private structure
200 */
atl1c_irq_reset(struct atl1c_adapter * adapter)201 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
202 {
203 atomic_set(&adapter->irq_sem, 1);
204 atl1c_irq_enable(adapter);
205 }
206
207 /*
208 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
209 * of the idle status register until the device is actually idle
210 */
atl1c_wait_until_idle(struct atl1c_hw * hw,u32 modu_ctrl)211 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
212 {
213 int timeout;
214 u32 data;
215
216 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
217 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
218 if ((data & modu_ctrl) == 0)
219 return 0;
220 msleep(1);
221 }
222 return data;
223 }
224
225 /**
226 * atl1c_phy_config - Timer Call-back
227 * @data: pointer to netdev cast into an unsigned long
228 */
atl1c_phy_config(unsigned long data)229 static void atl1c_phy_config(unsigned long data)
230 {
231 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
232 struct atl1c_hw *hw = &adapter->hw;
233 unsigned long flags;
234
235 spin_lock_irqsave(&adapter->mdio_lock, flags);
236 atl1c_restart_autoneg(hw);
237 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
238 }
239
atl1c_reinit_locked(struct atl1c_adapter * adapter)240 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
241 {
242 WARN_ON(in_interrupt());
243 atl1c_down(adapter);
244 atl1c_up(adapter);
245 clear_bit(__AT_RESETTING, &adapter->flags);
246 }
247
atl1c_check_link_status(struct atl1c_adapter * adapter)248 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
249 {
250 struct atl1c_hw *hw = &adapter->hw;
251 struct net_device *netdev = adapter->netdev;
252 struct pci_dev *pdev = adapter->pdev;
253 int err;
254 unsigned long flags;
255 u16 speed, duplex, phy_data;
256
257 spin_lock_irqsave(&adapter->mdio_lock, flags);
258 /* MII_BMSR must read twise */
259 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
260 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
261 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
262
263 if ((phy_data & BMSR_LSTATUS) == 0) {
264 /* link down */
265 netif_carrier_off(netdev);
266 hw->hibernate = true;
267 if (atl1c_reset_mac(hw) != 0)
268 if (netif_msg_hw(adapter))
269 dev_warn(&pdev->dev, "reset mac failed\n");
270 atl1c_set_aspm(hw, SPEED_0);
271 atl1c_post_phy_linkchg(hw, SPEED_0);
272 atl1c_reset_dma_ring(adapter);
273 atl1c_configure(adapter);
274 } else {
275 /* Link Up */
276 hw->hibernate = false;
277 spin_lock_irqsave(&adapter->mdio_lock, flags);
278 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
279 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
280 if (unlikely(err))
281 return;
282 /* link result is our setting */
283 if (adapter->link_speed != speed ||
284 adapter->link_duplex != duplex) {
285 adapter->link_speed = speed;
286 adapter->link_duplex = duplex;
287 atl1c_set_aspm(hw, speed);
288 atl1c_post_phy_linkchg(hw, speed);
289 atl1c_start_mac(adapter);
290 if (netif_msg_link(adapter))
291 dev_info(&pdev->dev,
292 "%s: %s NIC Link is Up<%d Mbps %s>\n",
293 atl1c_driver_name, netdev->name,
294 adapter->link_speed,
295 adapter->link_duplex == FULL_DUPLEX ?
296 "Full Duplex" : "Half Duplex");
297 }
298 if (!netif_carrier_ok(netdev))
299 netif_carrier_on(netdev);
300 }
301 }
302
atl1c_link_chg_event(struct atl1c_adapter * adapter)303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
304 {
305 struct net_device *netdev = adapter->netdev;
306 struct pci_dev *pdev = adapter->pdev;
307 u16 phy_data;
308 u16 link_up;
309
310 spin_lock(&adapter->mdio_lock);
311 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
312 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
313 spin_unlock(&adapter->mdio_lock);
314 link_up = phy_data & BMSR_LSTATUS;
315 /* notify upper layer link down ASAP */
316 if (!link_up) {
317 if (netif_carrier_ok(netdev)) {
318 /* old link state: Up */
319 netif_carrier_off(netdev);
320 if (netif_msg_link(adapter))
321 dev_info(&pdev->dev,
322 "%s: %s NIC Link is Down\n",
323 atl1c_driver_name, netdev->name);
324 adapter->link_speed = SPEED_0;
325 }
326 }
327
328 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
329 schedule_work(&adapter->common_task);
330 }
331
atl1c_common_task(struct work_struct * work)332 static void atl1c_common_task(struct work_struct *work)
333 {
334 struct atl1c_adapter *adapter;
335 struct net_device *netdev;
336
337 adapter = container_of(work, struct atl1c_adapter, common_task);
338 netdev = adapter->netdev;
339
340 if (test_bit(__AT_DOWN, &adapter->flags))
341 return;
342
343 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
344 netif_device_detach(netdev);
345 atl1c_down(adapter);
346 atl1c_up(adapter);
347 netif_device_attach(netdev);
348 }
349
350 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
351 &adapter->work_event)) {
352 atl1c_irq_disable(adapter);
353 atl1c_check_link_status(adapter);
354 atl1c_irq_enable(adapter);
355 }
356 }
357
358
atl1c_del_timer(struct atl1c_adapter * adapter)359 static void atl1c_del_timer(struct atl1c_adapter *adapter)
360 {
361 del_timer_sync(&adapter->phy_config_timer);
362 }
363
364
365 /**
366 * atl1c_tx_timeout - Respond to a Tx Hang
367 * @netdev: network interface device structure
368 */
atl1c_tx_timeout(struct net_device * netdev)369 static void atl1c_tx_timeout(struct net_device *netdev)
370 {
371 struct atl1c_adapter *adapter = netdev_priv(netdev);
372
373 /* Do the reset outside of interrupt context */
374 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
375 schedule_work(&adapter->common_task);
376 }
377
378 /**
379 * atl1c_set_multi - Multicast and Promiscuous mode set
380 * @netdev: network interface device structure
381 *
382 * The set_multi entry point is called whenever the multicast address
383 * list or the network interface flags are updated. This routine is
384 * responsible for configuring the hardware for proper multicast,
385 * promiscuous mode, and all-multi behavior.
386 */
atl1c_set_multi(struct net_device * netdev)387 static void atl1c_set_multi(struct net_device *netdev)
388 {
389 struct atl1c_adapter *adapter = netdev_priv(netdev);
390 struct atl1c_hw *hw = &adapter->hw;
391 struct netdev_hw_addr *ha;
392 u32 mac_ctrl_data;
393 u32 hash_value;
394
395 /* Check for Promiscuous and All Multicast modes */
396 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
397
398 if (netdev->flags & IFF_PROMISC) {
399 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
400 } else if (netdev->flags & IFF_ALLMULTI) {
401 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
402 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
403 } else {
404 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
405 }
406
407 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
408
409 /* clear the old settings from the multicast hash table */
410 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
411 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
412
413 /* comoute mc addresses' hash value ,and put it into hash table */
414 netdev_for_each_mc_addr(ha, netdev) {
415 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
416 atl1c_hash_set(hw, hash_value);
417 }
418 }
419
__atl1c_vlan_mode(netdev_features_t features,u32 * mac_ctrl_data)420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
421 {
422 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
423 /* enable VLAN tag insert/strip */
424 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
425 } else {
426 /* disable VLAN tag insert/strip */
427 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
428 }
429 }
430
atl1c_vlan_mode(struct net_device * netdev,netdev_features_t features)431 static void atl1c_vlan_mode(struct net_device *netdev,
432 netdev_features_t features)
433 {
434 struct atl1c_adapter *adapter = netdev_priv(netdev);
435 struct pci_dev *pdev = adapter->pdev;
436 u32 mac_ctrl_data = 0;
437
438 if (netif_msg_pktdata(adapter))
439 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
440
441 atl1c_irq_disable(adapter);
442 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
443 __atl1c_vlan_mode(features, &mac_ctrl_data);
444 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
445 atl1c_irq_enable(adapter);
446 }
447
atl1c_restore_vlan(struct atl1c_adapter * adapter)448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
449 {
450 struct pci_dev *pdev = adapter->pdev;
451
452 if (netif_msg_pktdata(adapter))
453 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
454 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
455 }
456
457 /**
458 * atl1c_set_mac - Change the Ethernet Address of the NIC
459 * @netdev: network interface device structure
460 * @p: pointer to an address structure
461 *
462 * Returns 0 on success, negative on failure
463 */
atl1c_set_mac_addr(struct net_device * netdev,void * p)464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
465 {
466 struct atl1c_adapter *adapter = netdev_priv(netdev);
467 struct sockaddr *addr = p;
468
469 if (!is_valid_ether_addr(addr->sa_data))
470 return -EADDRNOTAVAIL;
471
472 if (netif_running(netdev))
473 return -EBUSY;
474
475 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
476 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
477
478 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
479
480 return 0;
481 }
482
atl1c_set_rxbufsize(struct atl1c_adapter * adapter,struct net_device * dev)483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
484 struct net_device *dev)
485 {
486 unsigned int head_size;
487 int mtu = dev->mtu;
488
489 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
490 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
491
492 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
493 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
494 adapter->rx_frag_size = roundup_pow_of_two(head_size);
495 }
496
atl1c_fix_features(struct net_device * netdev,netdev_features_t features)497 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
498 netdev_features_t features)
499 {
500 /*
501 * Since there is no support for separate rx/tx vlan accel
502 * enable/disable make sure tx flag is always in same state as rx.
503 */
504 if (features & NETIF_F_HW_VLAN_CTAG_RX)
505 features |= NETIF_F_HW_VLAN_CTAG_TX;
506 else
507 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
508
509 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
510 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
511
512 return features;
513 }
514
atl1c_set_features(struct net_device * netdev,netdev_features_t features)515 static int atl1c_set_features(struct net_device *netdev,
516 netdev_features_t features)
517 {
518 netdev_features_t changed = netdev->features ^ features;
519
520 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
521 atl1c_vlan_mode(netdev, features);
522
523 return 0;
524 }
525
526 /**
527 * atl1c_change_mtu - Change the Maximum Transfer Unit
528 * @netdev: network interface device structure
529 * @new_mtu: new value for maximum frame size
530 *
531 * Returns 0 on success, negative on failure
532 */
atl1c_change_mtu(struct net_device * netdev,int new_mtu)533 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
534 {
535 struct atl1c_adapter *adapter = netdev_priv(netdev);
536 struct atl1c_hw *hw = &adapter->hw;
537 int old_mtu = netdev->mtu;
538 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
539
540 /* Fast Ethernet controller doesn't support jumbo packet */
541 if (((hw->nic_type == athr_l2c ||
542 hw->nic_type == athr_l2c_b ||
543 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
544 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
545 max_frame > MAX_JUMBO_FRAME_SIZE) {
546 if (netif_msg_link(adapter))
547 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
548 return -EINVAL;
549 }
550 /* set MTU */
551 if (old_mtu != new_mtu && netif_running(netdev)) {
552 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
553 msleep(1);
554 netdev->mtu = new_mtu;
555 adapter->hw.max_frame_size = new_mtu;
556 atl1c_set_rxbufsize(adapter, netdev);
557 atl1c_down(adapter);
558 netdev_update_features(netdev);
559 atl1c_up(adapter);
560 clear_bit(__AT_RESETTING, &adapter->flags);
561 }
562 return 0;
563 }
564
565 /*
566 * caller should hold mdio_lock
567 */
atl1c_mdio_read(struct net_device * netdev,int phy_id,int reg_num)568 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
569 {
570 struct atl1c_adapter *adapter = netdev_priv(netdev);
571 u16 result;
572
573 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
574 return result;
575 }
576
atl1c_mdio_write(struct net_device * netdev,int phy_id,int reg_num,int val)577 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
578 int reg_num, int val)
579 {
580 struct atl1c_adapter *adapter = netdev_priv(netdev);
581
582 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
583 }
584
atl1c_mii_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)585 static int atl1c_mii_ioctl(struct net_device *netdev,
586 struct ifreq *ifr, int cmd)
587 {
588 struct atl1c_adapter *adapter = netdev_priv(netdev);
589 struct pci_dev *pdev = adapter->pdev;
590 struct mii_ioctl_data *data = if_mii(ifr);
591 unsigned long flags;
592 int retval = 0;
593
594 if (!netif_running(netdev))
595 return -EINVAL;
596
597 spin_lock_irqsave(&adapter->mdio_lock, flags);
598 switch (cmd) {
599 case SIOCGMIIPHY:
600 data->phy_id = 0;
601 break;
602
603 case SIOCGMIIREG:
604 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
605 &data->val_out)) {
606 retval = -EIO;
607 goto out;
608 }
609 break;
610
611 case SIOCSMIIREG:
612 if (data->reg_num & ~(0x1F)) {
613 retval = -EFAULT;
614 goto out;
615 }
616
617 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
618 data->reg_num, data->val_in);
619 if (atl1c_write_phy_reg(&adapter->hw,
620 data->reg_num, data->val_in)) {
621 retval = -EIO;
622 goto out;
623 }
624 break;
625
626 default:
627 retval = -EOPNOTSUPP;
628 break;
629 }
630 out:
631 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
632 return retval;
633 }
634
atl1c_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)635 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
636 {
637 switch (cmd) {
638 case SIOCGMIIPHY:
639 case SIOCGMIIREG:
640 case SIOCSMIIREG:
641 return atl1c_mii_ioctl(netdev, ifr, cmd);
642 default:
643 return -EOPNOTSUPP;
644 }
645 }
646
647 /**
648 * atl1c_alloc_queues - Allocate memory for all rings
649 * @adapter: board private structure to initialize
650 *
651 */
atl1c_alloc_queues(struct atl1c_adapter * adapter)652 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
653 {
654 return 0;
655 }
656
atl1c_set_mac_type(struct atl1c_hw * hw)657 static void atl1c_set_mac_type(struct atl1c_hw *hw)
658 {
659 switch (hw->device_id) {
660 case PCI_DEVICE_ID_ATTANSIC_L2C:
661 hw->nic_type = athr_l2c;
662 break;
663 case PCI_DEVICE_ID_ATTANSIC_L1C:
664 hw->nic_type = athr_l1c;
665 break;
666 case PCI_DEVICE_ID_ATHEROS_L2C_B:
667 hw->nic_type = athr_l2c_b;
668 break;
669 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
670 hw->nic_type = athr_l2c_b2;
671 break;
672 case PCI_DEVICE_ID_ATHEROS_L1D:
673 hw->nic_type = athr_l1d;
674 break;
675 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
676 hw->nic_type = athr_l1d_2;
677 break;
678 default:
679 break;
680 }
681 }
682
atl1c_setup_mac_funcs(struct atl1c_hw * hw)683 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
684 {
685 u32 link_ctrl_data;
686
687 atl1c_set_mac_type(hw);
688 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
689
690 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
691 ATL1C_TXQ_MODE_ENHANCE;
692 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
693 ATL1C_ASPM_L1_SUPPORT;
694 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
695
696 if (hw->nic_type == athr_l1c ||
697 hw->nic_type == athr_l1d ||
698 hw->nic_type == athr_l1d_2)
699 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
700 return 0;
701 }
702
703 struct atl1c_platform_patch {
704 u16 pci_did;
705 u8 pci_revid;
706 u16 subsystem_vid;
707 u16 subsystem_did;
708 u32 patch_flag;
709 #define ATL1C_LINK_PATCH 0x1
710 };
711 static const struct atl1c_platform_patch plats[] = {
712 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
713 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
714 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
715 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
716 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
717 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
718 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
719 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
720 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
721 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
722 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
723 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
724 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
725 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
726 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
727 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
728 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
729 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
730 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
731 {0},
732 };
733
atl1c_patch_assign(struct atl1c_hw * hw)734 static void atl1c_patch_assign(struct atl1c_hw *hw)
735 {
736 struct pci_dev *pdev = hw->adapter->pdev;
737 u32 misc_ctrl;
738 int i = 0;
739
740 hw->msi_lnkpatch = false;
741
742 while (plats[i].pci_did != 0) {
743 if (plats[i].pci_did == hw->device_id &&
744 plats[i].pci_revid == hw->revision_id &&
745 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
746 plats[i].subsystem_did == hw->subsystem_id) {
747 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
748 hw->msi_lnkpatch = true;
749 }
750 i++;
751 }
752
753 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
754 hw->revision_id == L2CB_V21) {
755 /* config acess mode */
756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
757 REG_PCIE_DEV_MISC_CTRL);
758 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
759 misc_ctrl &= ~0x100;
760 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
761 REG_PCIE_DEV_MISC_CTRL);
762 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
763 }
764 }
765 /**
766 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
767 * @adapter: board private structure to initialize
768 *
769 * atl1c_sw_init initializes the Adapter private data structure.
770 * Fields are initialized based on PCI device information and
771 * OS network device settings (MTU size).
772 */
atl1c_sw_init(struct atl1c_adapter * adapter)773 static int atl1c_sw_init(struct atl1c_adapter *adapter)
774 {
775 struct atl1c_hw *hw = &adapter->hw;
776 struct pci_dev *pdev = adapter->pdev;
777 u32 revision;
778
779
780 adapter->wol = 0;
781 device_set_wakeup_enable(&pdev->dev, false);
782 adapter->link_speed = SPEED_0;
783 adapter->link_duplex = FULL_DUPLEX;
784 adapter->tpd_ring[0].count = 1024;
785 adapter->rfd_ring.count = 512;
786
787 hw->vendor_id = pdev->vendor;
788 hw->device_id = pdev->device;
789 hw->subsystem_vendor_id = pdev->subsystem_vendor;
790 hw->subsystem_id = pdev->subsystem_device;
791 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
792 hw->revision_id = revision & 0xFF;
793 /* before link up, we assume hibernate is true */
794 hw->hibernate = true;
795 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
796 if (atl1c_setup_mac_funcs(hw) != 0) {
797 dev_err(&pdev->dev, "set mac function pointers failed\n");
798 return -1;
799 }
800 atl1c_patch_assign(hw);
801
802 hw->intr_mask = IMR_NORMAL_MASK;
803 hw->phy_configured = false;
804 hw->preamble_len = 7;
805 hw->max_frame_size = adapter->netdev->mtu;
806 hw->autoneg_advertised = ADVERTISED_Autoneg;
807 hw->indirect_tab = 0xE4E4E4E4;
808 hw->base_cpu = 0;
809
810 hw->ict = 50000; /* 100ms */
811 hw->smb_timer = 200000; /* 400ms */
812 hw->rx_imt = 200;
813 hw->tx_imt = 1000;
814
815 hw->tpd_burst = 5;
816 hw->rfd_burst = 8;
817 hw->dma_order = atl1c_dma_ord_out;
818 hw->dmar_block = atl1c_dma_req_1024;
819
820 if (atl1c_alloc_queues(adapter)) {
821 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
822 return -ENOMEM;
823 }
824 /* TODO */
825 atl1c_set_rxbufsize(adapter, adapter->netdev);
826 atomic_set(&adapter->irq_sem, 1);
827 spin_lock_init(&adapter->mdio_lock);
828 spin_lock_init(&adapter->tx_lock);
829 set_bit(__AT_DOWN, &adapter->flags);
830
831 return 0;
832 }
833
atl1c_clean_buffer(struct pci_dev * pdev,struct atl1c_buffer * buffer_info)834 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
835 struct atl1c_buffer *buffer_info)
836 {
837 u16 pci_driection;
838 if (buffer_info->flags & ATL1C_BUFFER_FREE)
839 return;
840 if (buffer_info->dma) {
841 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
842 pci_driection = PCI_DMA_FROMDEVICE;
843 else
844 pci_driection = PCI_DMA_TODEVICE;
845
846 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
847 pci_unmap_single(pdev, buffer_info->dma,
848 buffer_info->length, pci_driection);
849 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
850 pci_unmap_page(pdev, buffer_info->dma,
851 buffer_info->length, pci_driection);
852 }
853 if (buffer_info->skb)
854 dev_consume_skb_any(buffer_info->skb);
855 buffer_info->dma = 0;
856 buffer_info->skb = NULL;
857 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
858 }
859 /**
860 * atl1c_clean_tx_ring - Free Tx-skb
861 * @adapter: board private structure
862 */
atl1c_clean_tx_ring(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)863 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
864 enum atl1c_trans_queue type)
865 {
866 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
867 struct atl1c_buffer *buffer_info;
868 struct pci_dev *pdev = adapter->pdev;
869 u16 index, ring_count;
870
871 ring_count = tpd_ring->count;
872 for (index = 0; index < ring_count; index++) {
873 buffer_info = &tpd_ring->buffer_info[index];
874 atl1c_clean_buffer(pdev, buffer_info);
875 }
876
877 /* Zero out Tx-buffers */
878 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
879 ring_count);
880 atomic_set(&tpd_ring->next_to_clean, 0);
881 tpd_ring->next_to_use = 0;
882 }
883
884 /**
885 * atl1c_clean_rx_ring - Free rx-reservation skbs
886 * @adapter: board private structure
887 */
atl1c_clean_rx_ring(struct atl1c_adapter * adapter)888 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
889 {
890 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
891 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
892 struct atl1c_buffer *buffer_info;
893 struct pci_dev *pdev = adapter->pdev;
894 int j;
895
896 for (j = 0; j < rfd_ring->count; j++) {
897 buffer_info = &rfd_ring->buffer_info[j];
898 atl1c_clean_buffer(pdev, buffer_info);
899 }
900 /* zero out the descriptor ring */
901 memset(rfd_ring->desc, 0, rfd_ring->size);
902 rfd_ring->next_to_clean = 0;
903 rfd_ring->next_to_use = 0;
904 rrd_ring->next_to_use = 0;
905 rrd_ring->next_to_clean = 0;
906 }
907
908 /*
909 * Read / Write Ptr Initialize:
910 */
atl1c_init_ring_ptrs(struct atl1c_adapter * adapter)911 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
912 {
913 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
914 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
915 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
916 struct atl1c_buffer *buffer_info;
917 int i, j;
918
919 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
920 tpd_ring[i].next_to_use = 0;
921 atomic_set(&tpd_ring[i].next_to_clean, 0);
922 buffer_info = tpd_ring[i].buffer_info;
923 for (j = 0; j < tpd_ring->count; j++)
924 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
925 ATL1C_BUFFER_FREE);
926 }
927 rfd_ring->next_to_use = 0;
928 rfd_ring->next_to_clean = 0;
929 rrd_ring->next_to_use = 0;
930 rrd_ring->next_to_clean = 0;
931 for (j = 0; j < rfd_ring->count; j++) {
932 buffer_info = &rfd_ring->buffer_info[j];
933 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
934 }
935 }
936
937 /**
938 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
939 * @adapter: board private structure
940 *
941 * Free all transmit software resources
942 */
atl1c_free_ring_resources(struct atl1c_adapter * adapter)943 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
944 {
945 struct pci_dev *pdev = adapter->pdev;
946
947 pci_free_consistent(pdev, adapter->ring_header.size,
948 adapter->ring_header.desc,
949 adapter->ring_header.dma);
950 adapter->ring_header.desc = NULL;
951
952 /* Note: just free tdp_ring.buffer_info,
953 * it contain rfd_ring.buffer_info, do not double free */
954 if (adapter->tpd_ring[0].buffer_info) {
955 kfree(adapter->tpd_ring[0].buffer_info);
956 adapter->tpd_ring[0].buffer_info = NULL;
957 }
958 if (adapter->rx_page) {
959 put_page(adapter->rx_page);
960 adapter->rx_page = NULL;
961 }
962 }
963
964 /**
965 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
966 * @adapter: board private structure
967 *
968 * Return 0 on success, negative on failure
969 */
atl1c_setup_ring_resources(struct atl1c_adapter * adapter)970 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
971 {
972 struct pci_dev *pdev = adapter->pdev;
973 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
974 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
975 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
976 struct atl1c_ring_header *ring_header = &adapter->ring_header;
977 int size;
978 int i;
979 int count = 0;
980 int rx_desc_count = 0;
981 u32 offset = 0;
982
983 rrd_ring->count = rfd_ring->count;
984 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
985 tpd_ring[i].count = tpd_ring[0].count;
986
987 /* 2 tpd queue, one high priority queue,
988 * another normal priority queue */
989 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
990 rfd_ring->count);
991 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
992 if (unlikely(!tpd_ring->buffer_info))
993 goto err_nomem;
994
995 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
996 tpd_ring[i].buffer_info =
997 (tpd_ring->buffer_info + count);
998 count += tpd_ring[i].count;
999 }
1000
1001 rfd_ring->buffer_info =
1002 (tpd_ring->buffer_info + count);
1003 count += rfd_ring->count;
1004 rx_desc_count += rfd_ring->count;
1005
1006 /*
1007 * real ring DMA buffer
1008 * each ring/block may need up to 8 bytes for alignment, hence the
1009 * additional bytes tacked onto the end.
1010 */
1011 ring_header->size = size =
1012 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1013 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1014 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1015 8 * 4;
1016
1017 ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size,
1018 &ring_header->dma, GFP_KERNEL);
1019 if (unlikely(!ring_header->desc)) {
1020 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1021 goto err_nomem;
1022 }
1023 /* init TPD ring */
1024
1025 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1026 offset = tpd_ring[0].dma - ring_header->dma;
1027 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1028 tpd_ring[i].dma = ring_header->dma + offset;
1029 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1030 tpd_ring[i].size =
1031 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1032 offset += roundup(tpd_ring[i].size, 8);
1033 }
1034 /* init RFD ring */
1035 rfd_ring->dma = ring_header->dma + offset;
1036 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1037 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1038 offset += roundup(rfd_ring->size, 8);
1039
1040 /* init RRD ring */
1041 rrd_ring->dma = ring_header->dma + offset;
1042 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1043 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1044 rrd_ring->count;
1045 offset += roundup(rrd_ring->size, 8);
1046
1047 return 0;
1048
1049 err_nomem:
1050 kfree(tpd_ring->buffer_info);
1051 return -ENOMEM;
1052 }
1053
atl1c_configure_des_ring(struct atl1c_adapter * adapter)1054 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1055 {
1056 struct atl1c_hw *hw = &adapter->hw;
1057 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1058 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1059 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1060 adapter->tpd_ring;
1061
1062 /* TPD */
1063 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1064 (u32)((tpd_ring[atl1c_trans_normal].dma &
1065 AT_DMA_HI_ADDR_MASK) >> 32));
1066 /* just enable normal priority TX queue */
1067 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1068 (u32)(tpd_ring[atl1c_trans_normal].dma &
1069 AT_DMA_LO_ADDR_MASK));
1070 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1071 (u32)(tpd_ring[atl1c_trans_high].dma &
1072 AT_DMA_LO_ADDR_MASK));
1073 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1074 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1075
1076
1077 /* RFD */
1078 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1079 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1080 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1081 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1082
1083 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1084 rfd_ring->count & RFD_RING_SIZE_MASK);
1085 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1086 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1087
1088 /* RRD */
1089 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1090 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1091 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1092 (rrd_ring->count & RRD_RING_SIZE_MASK));
1093
1094 if (hw->nic_type == athr_l2c_b) {
1095 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1096 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1097 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1098 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1099 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1100 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1101 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1102 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1103 }
1104 /* Load all of base address above */
1105 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1106 }
1107
atl1c_configure_tx(struct atl1c_adapter * adapter)1108 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1109 {
1110 struct atl1c_hw *hw = &adapter->hw;
1111 int max_pay_load;
1112 u16 tx_offload_thresh;
1113 u32 txq_ctrl_data;
1114
1115 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1116 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1117 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1118 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1119 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1120 /*
1121 * if BIOS had changed the dam-read-max-length to an invalid value,
1122 * restore it to default value
1123 */
1124 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1125 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1126 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1127 }
1128 txq_ctrl_data =
1129 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1130 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1131
1132 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1133 }
1134
atl1c_configure_rx(struct atl1c_adapter * adapter)1135 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1136 {
1137 struct atl1c_hw *hw = &adapter->hw;
1138 u32 rxq_ctrl_data;
1139
1140 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1141 RXQ_RFD_BURST_NUM_SHIFT;
1142
1143 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1144 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1145
1146 /* aspm for gigabit */
1147 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1148 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1149 ASPM_THRUPUT_LIMIT_100M);
1150
1151 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1152 }
1153
atl1c_configure_dma(struct atl1c_adapter * adapter)1154 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1155 {
1156 struct atl1c_hw *hw = &adapter->hw;
1157 u32 dma_ctrl_data;
1158
1159 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1160 DMA_CTRL_RREQ_PRI_DATA |
1161 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1162 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1163 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1164
1165 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1166 }
1167
1168 /*
1169 * Stop the mac, transmit and receive units
1170 * hw - Struct containing variables accessed by shared code
1171 * return : 0 or idle status (if error)
1172 */
atl1c_stop_mac(struct atl1c_hw * hw)1173 static int atl1c_stop_mac(struct atl1c_hw *hw)
1174 {
1175 u32 data;
1176
1177 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1178 data &= ~RXQ_CTRL_EN;
1179 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1180
1181 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1182 data &= ~TXQ_CTRL_EN;
1183 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1184
1185 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1186
1187 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1188 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1189 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1190
1191 return (int)atl1c_wait_until_idle(hw,
1192 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1193 }
1194
atl1c_start_mac(struct atl1c_adapter * adapter)1195 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1196 {
1197 struct atl1c_hw *hw = &adapter->hw;
1198 u32 mac, txq, rxq;
1199
1200 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1201 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1202 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1203
1204 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1205 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1206 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1207
1208 txq |= TXQ_CTRL_EN;
1209 rxq |= RXQ_CTRL_EN;
1210 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1211 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1212 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1213 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1214 MAC_CTRL_HASH_ALG_CRC32;
1215 if (hw->mac_duplex)
1216 mac |= MAC_CTRL_DUPLX;
1217 else
1218 mac &= ~MAC_CTRL_DUPLX;
1219 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1220 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1221
1222 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1223 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1224 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1225 }
1226
1227 /*
1228 * Reset the transmit and receive units; mask and clear all interrupts.
1229 * hw - Struct containing variables accessed by shared code
1230 * return : 0 or idle status (if error)
1231 */
atl1c_reset_mac(struct atl1c_hw * hw)1232 static int atl1c_reset_mac(struct atl1c_hw *hw)
1233 {
1234 struct atl1c_adapter *adapter = hw->adapter;
1235 struct pci_dev *pdev = adapter->pdev;
1236 u32 ctrl_data = 0;
1237
1238 atl1c_stop_mac(hw);
1239 /*
1240 * Issue Soft Reset to the MAC. This will reset the chip's
1241 * transmit, receive, DMA. It will not effect
1242 * the current PCI configuration. The global reset bit is self-
1243 * clearing, and should clear within a microsecond.
1244 */
1245 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1246 ctrl_data |= MASTER_CTRL_OOB_DIS;
1247 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1248
1249 AT_WRITE_FLUSH(hw);
1250 msleep(10);
1251 /* Wait at least 10ms for All module to be Idle */
1252
1253 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1254 dev_err(&pdev->dev,
1255 "MAC state machine can't be idle since"
1256 " disabled for 10ms second\n");
1257 return -1;
1258 }
1259 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1260
1261 /* driver control speed/duplex */
1262 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1263 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1264
1265 /* clk switch setting */
1266 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1267 switch (hw->nic_type) {
1268 case athr_l2c_b:
1269 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1270 SERDES_MAC_CLK_SLOWDOWN);
1271 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1272 break;
1273 case athr_l2c_b2:
1274 case athr_l1d_2:
1275 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1276 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1277 break;
1278 default:
1279 break;
1280 }
1281
1282 return 0;
1283 }
1284
atl1c_disable_l0s_l1(struct atl1c_hw * hw)1285 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1286 {
1287 u16 ctrl_flags = hw->ctrl_flags;
1288
1289 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1290 atl1c_set_aspm(hw, SPEED_0);
1291 hw->ctrl_flags = ctrl_flags;
1292 }
1293
1294 /*
1295 * Set ASPM state.
1296 * Enable/disable L0s/L1 depend on link state.
1297 */
atl1c_set_aspm(struct atl1c_hw * hw,u16 link_speed)1298 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1299 {
1300 u32 pm_ctrl_data;
1301 u32 link_l1_timer;
1302
1303 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1304 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1305 PM_CTRL_ASPM_L0S_EN |
1306 PM_CTRL_MAC_ASPM_CHK);
1307 /* L1 timer */
1308 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1309 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1310 link_l1_timer =
1311 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1312 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1313 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1314 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1315 } else {
1316 link_l1_timer = hw->nic_type == athr_l2c_b ?
1317 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1318 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1319 link_l1_timer = 1;
1320 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1321 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1322 }
1323
1324 /* L0S/L1 enable */
1325 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1326 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1327 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1328 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1329
1330 /* l2cb & l1d & l2cb2 & l1d2 */
1331 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1332 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1333 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1334 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1335 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1336 PM_CTRL_SERDES_PD_EX_L1 |
1337 PM_CTRL_CLK_SWH_L1;
1338 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1339 PM_CTRL_SERDES_PLL_L1_EN |
1340 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1341 PM_CTRL_SA_DLY_EN |
1342 PM_CTRL_HOTRST);
1343 /* disable l0s if link down or l2cb */
1344 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1345 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1346 } else { /* l1c */
1347 pm_ctrl_data =
1348 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1349 if (link_speed != SPEED_0) {
1350 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1351 PM_CTRL_SERDES_PLL_L1_EN |
1352 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1353 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1354 PM_CTRL_CLK_SWH_L1 |
1355 PM_CTRL_ASPM_L0S_EN |
1356 PM_CTRL_ASPM_L1_EN);
1357 } else { /* link down */
1358 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1359 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1360 PM_CTRL_SERDES_PLL_L1_EN |
1361 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1362 PM_CTRL_ASPM_L0S_EN);
1363 }
1364 }
1365 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1366
1367 return;
1368 }
1369
1370 /**
1371 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1372 * @adapter: board private structure
1373 *
1374 * Configure the Tx /Rx unit of the MAC after a reset.
1375 */
atl1c_configure_mac(struct atl1c_adapter * adapter)1376 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1377 {
1378 struct atl1c_hw *hw = &adapter->hw;
1379 u32 master_ctrl_data = 0;
1380 u32 intr_modrt_data;
1381 u32 data;
1382
1383 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1384 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1385 MASTER_CTRL_RX_ITIMER_EN |
1386 MASTER_CTRL_INT_RDCLR);
1387 /* clear interrupt status */
1388 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1389 /* Clear any WOL status */
1390 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1391 /* set Interrupt Clear Timer
1392 * HW will enable self to assert interrupt event to system after
1393 * waiting x-time for software to notify it accept interrupt.
1394 */
1395
1396 data = CLK_GATING_EN_ALL;
1397 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1398 if (hw->nic_type == athr_l2c_b)
1399 data &= ~CLK_GATING_RXMAC_EN;
1400 } else
1401 data = 0;
1402 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1403
1404 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1405 hw->ict & INT_RETRIG_TIMER_MASK);
1406
1407 atl1c_configure_des_ring(adapter);
1408
1409 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1410 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1411 IRQ_MODRT_TX_TIMER_SHIFT;
1412 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1413 IRQ_MODRT_RX_TIMER_SHIFT;
1414 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1415 master_ctrl_data |=
1416 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1417 }
1418
1419 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1420 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1421
1422 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1423 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1424
1425 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1426 hw->smb_timer & SMB_STAT_TIMER_MASK);
1427
1428 /* set MTU */
1429 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1430 VLAN_HLEN + ETH_FCS_LEN);
1431
1432 atl1c_configure_tx(adapter);
1433 atl1c_configure_rx(adapter);
1434 atl1c_configure_dma(adapter);
1435
1436 return 0;
1437 }
1438
atl1c_configure(struct atl1c_adapter * adapter)1439 static int atl1c_configure(struct atl1c_adapter *adapter)
1440 {
1441 struct net_device *netdev = adapter->netdev;
1442 int num;
1443
1444 atl1c_init_ring_ptrs(adapter);
1445 atl1c_set_multi(netdev);
1446 atl1c_restore_vlan(adapter);
1447
1448 num = atl1c_alloc_rx_buffer(adapter);
1449 if (unlikely(num == 0))
1450 return -ENOMEM;
1451
1452 if (atl1c_configure_mac(adapter))
1453 return -EIO;
1454
1455 return 0;
1456 }
1457
atl1c_update_hw_stats(struct atl1c_adapter * adapter)1458 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1459 {
1460 u16 hw_reg_addr = 0;
1461 unsigned long *stats_item = NULL;
1462 u32 data;
1463
1464 /* update rx status */
1465 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1466 stats_item = &adapter->hw_stats.rx_ok;
1467 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1468 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1469 *stats_item += data;
1470 stats_item++;
1471 hw_reg_addr += 4;
1472 }
1473 /* update tx status */
1474 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1475 stats_item = &adapter->hw_stats.tx_ok;
1476 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1477 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1478 *stats_item += data;
1479 stats_item++;
1480 hw_reg_addr += 4;
1481 }
1482 }
1483
1484 /**
1485 * atl1c_get_stats - Get System Network Statistics
1486 * @netdev: network interface device structure
1487 *
1488 * Returns the address of the device statistics structure.
1489 * The statistics are actually updated from the timer callback.
1490 */
atl1c_get_stats(struct net_device * netdev)1491 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1492 {
1493 struct atl1c_adapter *adapter = netdev_priv(netdev);
1494 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1495 struct net_device_stats *net_stats = &netdev->stats;
1496
1497 atl1c_update_hw_stats(adapter);
1498 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1499 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1500 net_stats->multicast = hw_stats->rx_mcast;
1501 net_stats->collisions = hw_stats->tx_1_col +
1502 hw_stats->tx_2_col +
1503 hw_stats->tx_late_col +
1504 hw_stats->tx_abort_col;
1505
1506 net_stats->rx_errors = hw_stats->rx_frag +
1507 hw_stats->rx_fcs_err +
1508 hw_stats->rx_len_err +
1509 hw_stats->rx_sz_ov +
1510 hw_stats->rx_rrd_ov +
1511 hw_stats->rx_align_err +
1512 hw_stats->rx_rxf_ov;
1513
1514 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1515 net_stats->rx_length_errors = hw_stats->rx_len_err;
1516 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1517 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1518 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1519
1520 net_stats->tx_errors = hw_stats->tx_late_col +
1521 hw_stats->tx_abort_col +
1522 hw_stats->tx_underrun +
1523 hw_stats->tx_trunc;
1524
1525 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1526 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1527 net_stats->tx_window_errors = hw_stats->tx_late_col;
1528
1529 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1530 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1531
1532 return net_stats;
1533 }
1534
atl1c_clear_phy_int(struct atl1c_adapter * adapter)1535 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1536 {
1537 u16 phy_data;
1538
1539 spin_lock(&adapter->mdio_lock);
1540 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1541 spin_unlock(&adapter->mdio_lock);
1542 }
1543
atl1c_clean_tx_irq(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)1544 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1545 enum atl1c_trans_queue type)
1546 {
1547 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1548 struct atl1c_buffer *buffer_info;
1549 struct pci_dev *pdev = adapter->pdev;
1550 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1551 u16 hw_next_to_clean;
1552 u16 reg;
1553
1554 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1555
1556 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1557
1558 while (next_to_clean != hw_next_to_clean) {
1559 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1560 atl1c_clean_buffer(pdev, buffer_info);
1561 if (++next_to_clean == tpd_ring->count)
1562 next_to_clean = 0;
1563 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1564 }
1565
1566 if (netif_queue_stopped(adapter->netdev) &&
1567 netif_carrier_ok(adapter->netdev)) {
1568 netif_wake_queue(adapter->netdev);
1569 }
1570
1571 return true;
1572 }
1573
1574 /**
1575 * atl1c_intr - Interrupt Handler
1576 * @irq: interrupt number
1577 * @data: pointer to a network interface device structure
1578 */
atl1c_intr(int irq,void * data)1579 static irqreturn_t atl1c_intr(int irq, void *data)
1580 {
1581 struct net_device *netdev = data;
1582 struct atl1c_adapter *adapter = netdev_priv(netdev);
1583 struct pci_dev *pdev = adapter->pdev;
1584 struct atl1c_hw *hw = &adapter->hw;
1585 int max_ints = AT_MAX_INT_WORK;
1586 int handled = IRQ_NONE;
1587 u32 status;
1588 u32 reg_data;
1589
1590 do {
1591 AT_READ_REG(hw, REG_ISR, ®_data);
1592 status = reg_data & hw->intr_mask;
1593
1594 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1595 if (max_ints != AT_MAX_INT_WORK)
1596 handled = IRQ_HANDLED;
1597 break;
1598 }
1599 /* link event */
1600 if (status & ISR_GPHY)
1601 atl1c_clear_phy_int(adapter);
1602 /* Ack ISR */
1603 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1604 if (status & ISR_RX_PKT) {
1605 if (likely(napi_schedule_prep(&adapter->napi))) {
1606 hw->intr_mask &= ~ISR_RX_PKT;
1607 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1608 __napi_schedule(&adapter->napi);
1609 }
1610 }
1611 if (status & ISR_TX_PKT)
1612 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1613
1614 handled = IRQ_HANDLED;
1615 /* check if PCIE PHY Link down */
1616 if (status & ISR_ERROR) {
1617 if (netif_msg_hw(adapter))
1618 dev_err(&pdev->dev,
1619 "atl1c hardware error (status = 0x%x)\n",
1620 status & ISR_ERROR);
1621 /* reset MAC */
1622 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1623 schedule_work(&adapter->common_task);
1624 return IRQ_HANDLED;
1625 }
1626
1627 if (status & ISR_OVER)
1628 if (netif_msg_intr(adapter))
1629 dev_warn(&pdev->dev,
1630 "TX/RX overflow (status = 0x%x)\n",
1631 status & ISR_OVER);
1632
1633 /* link event */
1634 if (status & (ISR_GPHY | ISR_MANUAL)) {
1635 netdev->stats.tx_carrier_errors++;
1636 atl1c_link_chg_event(adapter);
1637 break;
1638 }
1639
1640 } while (--max_ints > 0);
1641 /* re-enable Interrupt*/
1642 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1643 return handled;
1644 }
1645
atl1c_rx_checksum(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_recv_ret_status * prrs)1646 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1647 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1648 {
1649 /*
1650 * The pid field in RRS in not correct sometimes, so we
1651 * cannot figure out if the packet is fragmented or not,
1652 * so we tell the KERNEL CHECKSUM_NONE
1653 */
1654 skb_checksum_none_assert(skb);
1655 }
1656
atl1c_alloc_skb(struct atl1c_adapter * adapter)1657 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1658 {
1659 struct sk_buff *skb;
1660 struct page *page;
1661
1662 if (adapter->rx_frag_size > PAGE_SIZE)
1663 return netdev_alloc_skb(adapter->netdev,
1664 adapter->rx_buffer_len);
1665
1666 page = adapter->rx_page;
1667 if (!page) {
1668 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1669 if (unlikely(!page))
1670 return NULL;
1671 adapter->rx_page_offset = 0;
1672 }
1673
1674 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1675 adapter->rx_frag_size);
1676 if (likely(skb)) {
1677 adapter->rx_page_offset += adapter->rx_frag_size;
1678 if (adapter->rx_page_offset >= PAGE_SIZE)
1679 adapter->rx_page = NULL;
1680 else
1681 get_page(page);
1682 }
1683 return skb;
1684 }
1685
atl1c_alloc_rx_buffer(struct atl1c_adapter * adapter)1686 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1687 {
1688 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1689 struct pci_dev *pdev = adapter->pdev;
1690 struct atl1c_buffer *buffer_info, *next_info;
1691 struct sk_buff *skb;
1692 void *vir_addr = NULL;
1693 u16 num_alloc = 0;
1694 u16 rfd_next_to_use, next_next;
1695 struct atl1c_rx_free_desc *rfd_desc;
1696 dma_addr_t mapping;
1697
1698 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1699 if (++next_next == rfd_ring->count)
1700 next_next = 0;
1701 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1702 next_info = &rfd_ring->buffer_info[next_next];
1703
1704 while (next_info->flags & ATL1C_BUFFER_FREE) {
1705 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1706
1707 skb = atl1c_alloc_skb(adapter);
1708 if (unlikely(!skb)) {
1709 if (netif_msg_rx_err(adapter))
1710 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1711 break;
1712 }
1713
1714 /*
1715 * Make buffer alignment 2 beyond a 16 byte boundary
1716 * this will result in a 16 byte aligned IP header after
1717 * the 14 byte MAC header is removed
1718 */
1719 vir_addr = skb->data;
1720 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1721 buffer_info->skb = skb;
1722 buffer_info->length = adapter->rx_buffer_len;
1723 mapping = pci_map_single(pdev, vir_addr,
1724 buffer_info->length,
1725 PCI_DMA_FROMDEVICE);
1726 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1727 dev_kfree_skb(skb);
1728 buffer_info->skb = NULL;
1729 buffer_info->length = 0;
1730 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1731 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1732 break;
1733 }
1734 buffer_info->dma = mapping;
1735 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1736 ATL1C_PCIMAP_FROMDEVICE);
1737 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1738 rfd_next_to_use = next_next;
1739 if (++next_next == rfd_ring->count)
1740 next_next = 0;
1741 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1742 next_info = &rfd_ring->buffer_info[next_next];
1743 num_alloc++;
1744 }
1745
1746 if (num_alloc) {
1747 /* TODO: update mailbox here */
1748 wmb();
1749 rfd_ring->next_to_use = rfd_next_to_use;
1750 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1751 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1752 }
1753
1754 return num_alloc;
1755 }
1756
atl1c_clean_rrd(struct atl1c_rrd_ring * rrd_ring,struct atl1c_recv_ret_status * rrs,u16 num)1757 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1758 struct atl1c_recv_ret_status *rrs, u16 num)
1759 {
1760 u16 i;
1761 /* the relationship between rrd and rfd is one map one */
1762 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1763 rrd_ring->next_to_clean)) {
1764 rrs->word3 &= ~RRS_RXD_UPDATED;
1765 if (++rrd_ring->next_to_clean == rrd_ring->count)
1766 rrd_ring->next_to_clean = 0;
1767 }
1768 }
1769
atl1c_clean_rfd(struct atl1c_rfd_ring * rfd_ring,struct atl1c_recv_ret_status * rrs,u16 num)1770 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1771 struct atl1c_recv_ret_status *rrs, u16 num)
1772 {
1773 u16 i;
1774 u16 rfd_index;
1775 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1776
1777 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1778 RRS_RX_RFD_INDEX_MASK;
1779 for (i = 0; i < num; i++) {
1780 buffer_info[rfd_index].skb = NULL;
1781 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1782 ATL1C_BUFFER_FREE);
1783 if (++rfd_index == rfd_ring->count)
1784 rfd_index = 0;
1785 }
1786 rfd_ring->next_to_clean = rfd_index;
1787 }
1788
atl1c_clean_rx_irq(struct atl1c_adapter * adapter,int * work_done,int work_to_do)1789 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1790 int *work_done, int work_to_do)
1791 {
1792 u16 rfd_num, rfd_index;
1793 u16 count = 0;
1794 u16 length;
1795 struct pci_dev *pdev = adapter->pdev;
1796 struct net_device *netdev = adapter->netdev;
1797 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1798 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1799 struct sk_buff *skb;
1800 struct atl1c_recv_ret_status *rrs;
1801 struct atl1c_buffer *buffer_info;
1802
1803 while (1) {
1804 if (*work_done >= work_to_do)
1805 break;
1806 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1807 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1808 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1809 RRS_RX_RFD_CNT_MASK;
1810 if (unlikely(rfd_num != 1))
1811 /* TODO support mul rfd*/
1812 if (netif_msg_rx_err(adapter))
1813 dev_warn(&pdev->dev,
1814 "Multi rfd not support yet!\n");
1815 goto rrs_checked;
1816 } else {
1817 break;
1818 }
1819 rrs_checked:
1820 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1821 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1822 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1823 if (netif_msg_rx_err(adapter))
1824 dev_warn(&pdev->dev,
1825 "wrong packet! rrs word3 is %x\n",
1826 rrs->word3);
1827 continue;
1828 }
1829
1830 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1831 RRS_PKT_SIZE_MASK);
1832 /* Good Receive */
1833 if (likely(rfd_num == 1)) {
1834 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1835 RRS_RX_RFD_INDEX_MASK;
1836 buffer_info = &rfd_ring->buffer_info[rfd_index];
1837 pci_unmap_single(pdev, buffer_info->dma,
1838 buffer_info->length, PCI_DMA_FROMDEVICE);
1839 skb = buffer_info->skb;
1840 } else {
1841 /* TODO */
1842 if (netif_msg_rx_err(adapter))
1843 dev_warn(&pdev->dev,
1844 "Multi rfd not support yet!\n");
1845 break;
1846 }
1847 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1848 skb_put(skb, length - ETH_FCS_LEN);
1849 skb->protocol = eth_type_trans(skb, netdev);
1850 atl1c_rx_checksum(adapter, skb, rrs);
1851 if (rrs->word3 & RRS_VLAN_INS) {
1852 u16 vlan;
1853
1854 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1855 vlan = le16_to_cpu(vlan);
1856 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1857 }
1858 netif_receive_skb(skb);
1859
1860 (*work_done)++;
1861 count++;
1862 }
1863 if (count)
1864 atl1c_alloc_rx_buffer(adapter);
1865 }
1866
1867 /**
1868 * atl1c_clean - NAPI Rx polling callback
1869 */
atl1c_clean(struct napi_struct * napi,int budget)1870 static int atl1c_clean(struct napi_struct *napi, int budget)
1871 {
1872 struct atl1c_adapter *adapter =
1873 container_of(napi, struct atl1c_adapter, napi);
1874 int work_done = 0;
1875
1876 /* Keep link state information with original netdev */
1877 if (!netif_carrier_ok(adapter->netdev))
1878 goto quit_polling;
1879 /* just enable one RXQ */
1880 atl1c_clean_rx_irq(adapter, &work_done, budget);
1881
1882 if (work_done < budget) {
1883 quit_polling:
1884 napi_complete(napi);
1885 adapter->hw.intr_mask |= ISR_RX_PKT;
1886 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1887 }
1888 return work_done;
1889 }
1890
1891 #ifdef CONFIG_NET_POLL_CONTROLLER
1892
1893 /*
1894 * Polling 'interrupt' - used by things like netconsole to send skbs
1895 * without having to re-enable interrupts. It's not called while
1896 * the interrupt routine is executing.
1897 */
atl1c_netpoll(struct net_device * netdev)1898 static void atl1c_netpoll(struct net_device *netdev)
1899 {
1900 struct atl1c_adapter *adapter = netdev_priv(netdev);
1901
1902 disable_irq(adapter->pdev->irq);
1903 atl1c_intr(adapter->pdev->irq, netdev);
1904 enable_irq(adapter->pdev->irq);
1905 }
1906 #endif
1907
atl1c_tpd_avail(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)1908 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1909 {
1910 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1911 u16 next_to_use = 0;
1912 u16 next_to_clean = 0;
1913
1914 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1915 next_to_use = tpd_ring->next_to_use;
1916
1917 return (u16)(next_to_clean > next_to_use) ?
1918 (next_to_clean - next_to_use - 1) :
1919 (tpd_ring->count + next_to_clean - next_to_use - 1);
1920 }
1921
1922 /*
1923 * get next usable tpd
1924 * Note: should call atl1c_tdp_avail to make sure
1925 * there is enough tpd to use
1926 */
atl1c_get_tpd(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)1927 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1928 enum atl1c_trans_queue type)
1929 {
1930 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1931 struct atl1c_tpd_desc *tpd_desc;
1932 u16 next_to_use = 0;
1933
1934 next_to_use = tpd_ring->next_to_use;
1935 if (++tpd_ring->next_to_use == tpd_ring->count)
1936 tpd_ring->next_to_use = 0;
1937 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1938 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1939 return tpd_desc;
1940 }
1941
1942 static struct atl1c_buffer *
atl1c_get_tx_buffer(struct atl1c_adapter * adapter,struct atl1c_tpd_desc * tpd)1943 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1944 {
1945 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1946
1947 return &tpd_ring->buffer_info[tpd -
1948 (struct atl1c_tpd_desc *)tpd_ring->desc];
1949 }
1950
1951 /* Calculate the transmit packet descript needed*/
atl1c_cal_tpd_req(const struct sk_buff * skb)1952 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1953 {
1954 u16 tpd_req;
1955 u16 proto_hdr_len = 0;
1956
1957 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1958
1959 if (skb_is_gso(skb)) {
1960 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1961 if (proto_hdr_len < skb_headlen(skb))
1962 tpd_req++;
1963 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1964 tpd_req++;
1965 }
1966 return tpd_req;
1967 }
1968
atl1c_tso_csum(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc ** tpd,enum atl1c_trans_queue type)1969 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1970 struct sk_buff *skb,
1971 struct atl1c_tpd_desc **tpd,
1972 enum atl1c_trans_queue type)
1973 {
1974 struct pci_dev *pdev = adapter->pdev;
1975 unsigned short offload_type;
1976 u8 hdr_len;
1977 u32 real_len;
1978
1979 if (skb_is_gso(skb)) {
1980 int err;
1981
1982 err = skb_cow_head(skb, 0);
1983 if (err < 0)
1984 return err;
1985
1986 offload_type = skb_shinfo(skb)->gso_type;
1987
1988 if (offload_type & SKB_GSO_TCPV4) {
1989 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1990 + ntohs(ip_hdr(skb)->tot_len));
1991
1992 if (real_len < skb->len)
1993 pskb_trim(skb, real_len);
1994
1995 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1996 if (unlikely(skb->len == hdr_len)) {
1997 /* only xsum need */
1998 if (netif_msg_tx_queued(adapter))
1999 dev_warn(&pdev->dev,
2000 "IPV4 tso with zero data??\n");
2001 goto check_sum;
2002 } else {
2003 ip_hdr(skb)->check = 0;
2004 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2005 ip_hdr(skb)->saddr,
2006 ip_hdr(skb)->daddr,
2007 0, IPPROTO_TCP, 0);
2008 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2009 }
2010 }
2011
2012 if (offload_type & SKB_GSO_TCPV6) {
2013 struct atl1c_tpd_ext_desc *etpd =
2014 *(struct atl1c_tpd_ext_desc **)(tpd);
2015
2016 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2017 *tpd = atl1c_get_tpd(adapter, type);
2018 ipv6_hdr(skb)->payload_len = 0;
2019 /* check payload == 0 byte ? */
2020 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2021 if (unlikely(skb->len == hdr_len)) {
2022 /* only xsum need */
2023 if (netif_msg_tx_queued(adapter))
2024 dev_warn(&pdev->dev,
2025 "IPV6 tso with zero data??\n");
2026 goto check_sum;
2027 } else
2028 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2029 &ipv6_hdr(skb)->saddr,
2030 &ipv6_hdr(skb)->daddr,
2031 0, IPPROTO_TCP, 0);
2032 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2033 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2034 etpd->pkt_len = cpu_to_le32(skb->len);
2035 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2036 }
2037
2038 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2039 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2040 TPD_TCPHDR_OFFSET_SHIFT;
2041 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2042 TPD_MSS_SHIFT;
2043 return 0;
2044 }
2045
2046 check_sum:
2047 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2048 u8 css, cso;
2049 cso = skb_checksum_start_offset(skb);
2050
2051 if (unlikely(cso & 0x1)) {
2052 if (netif_msg_tx_err(adapter))
2053 dev_err(&adapter->pdev->dev,
2054 "payload offset should not an event number\n");
2055 return -1;
2056 } else {
2057 css = cso + skb->csum_offset;
2058
2059 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2060 TPD_PLOADOFFSET_SHIFT;
2061 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2062 TPD_CCSUM_OFFSET_SHIFT;
2063 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2064 }
2065 }
2066 return 0;
2067 }
2068
atl1c_tx_rollback(struct atl1c_adapter * adpt,struct atl1c_tpd_desc * first_tpd,enum atl1c_trans_queue type)2069 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2070 struct atl1c_tpd_desc *first_tpd,
2071 enum atl1c_trans_queue type)
2072 {
2073 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2074 struct atl1c_buffer *buffer_info;
2075 struct atl1c_tpd_desc *tpd;
2076 u16 first_index, index;
2077
2078 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2079 index = first_index;
2080 while (index != tpd_ring->next_to_use) {
2081 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2082 buffer_info = &tpd_ring->buffer_info[index];
2083 atl1c_clean_buffer(adpt->pdev, buffer_info);
2084 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2085 if (++index == tpd_ring->count)
2086 index = 0;
2087 }
2088 tpd_ring->next_to_use = first_index;
2089 }
2090
atl1c_tx_map(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc * tpd,enum atl1c_trans_queue type)2091 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2092 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2093 enum atl1c_trans_queue type)
2094 {
2095 struct atl1c_tpd_desc *use_tpd = NULL;
2096 struct atl1c_buffer *buffer_info = NULL;
2097 u16 buf_len = skb_headlen(skb);
2098 u16 map_len = 0;
2099 u16 mapped_len = 0;
2100 u16 hdr_len = 0;
2101 u16 nr_frags;
2102 u16 f;
2103 int tso;
2104
2105 nr_frags = skb_shinfo(skb)->nr_frags;
2106 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2107 if (tso) {
2108 /* TSO */
2109 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2110 use_tpd = tpd;
2111
2112 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2113 buffer_info->length = map_len;
2114 buffer_info->dma = pci_map_single(adapter->pdev,
2115 skb->data, hdr_len, PCI_DMA_TODEVICE);
2116 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2117 buffer_info->dma)))
2118 goto err_dma;
2119 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2120 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2121 ATL1C_PCIMAP_TODEVICE);
2122 mapped_len += map_len;
2123 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2124 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2125 }
2126
2127 if (mapped_len < buf_len) {
2128 /* mapped_len == 0, means we should use the first tpd,
2129 which is given by caller */
2130 if (mapped_len == 0)
2131 use_tpd = tpd;
2132 else {
2133 use_tpd = atl1c_get_tpd(adapter, type);
2134 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2135 }
2136 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2137 buffer_info->length = buf_len - mapped_len;
2138 buffer_info->dma =
2139 pci_map_single(adapter->pdev, skb->data + mapped_len,
2140 buffer_info->length, PCI_DMA_TODEVICE);
2141 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2142 buffer_info->dma)))
2143 goto err_dma;
2144
2145 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2146 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2147 ATL1C_PCIMAP_TODEVICE);
2148 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2149 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2150 }
2151
2152 for (f = 0; f < nr_frags; f++) {
2153 struct skb_frag_struct *frag;
2154
2155 frag = &skb_shinfo(skb)->frags[f];
2156
2157 use_tpd = atl1c_get_tpd(adapter, type);
2158 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2159
2160 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2161 buffer_info->length = skb_frag_size(frag);
2162 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2163 frag, 0,
2164 buffer_info->length,
2165 DMA_TO_DEVICE);
2166 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2167 goto err_dma;
2168
2169 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2170 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2171 ATL1C_PCIMAP_TODEVICE);
2172 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2173 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2174 }
2175
2176 /* The last tpd */
2177 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2178 /* The last buffer info contain the skb address,
2179 so it will be free after unmap */
2180 buffer_info->skb = skb;
2181
2182 return 0;
2183
2184 err_dma:
2185 buffer_info->dma = 0;
2186 buffer_info->length = 0;
2187 return -1;
2188 }
2189
atl1c_tx_queue(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc * tpd,enum atl1c_trans_queue type)2190 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2191 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2192 {
2193 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2194 u16 reg;
2195
2196 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2197 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2198 }
2199
atl1c_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2200 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2201 struct net_device *netdev)
2202 {
2203 struct atl1c_adapter *adapter = netdev_priv(netdev);
2204 unsigned long flags;
2205 u16 tpd_req = 1;
2206 struct atl1c_tpd_desc *tpd;
2207 enum atl1c_trans_queue type = atl1c_trans_normal;
2208
2209 if (test_bit(__AT_DOWN, &adapter->flags)) {
2210 dev_kfree_skb_any(skb);
2211 return NETDEV_TX_OK;
2212 }
2213
2214 tpd_req = atl1c_cal_tpd_req(skb);
2215 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2216 if (netif_msg_pktdata(adapter))
2217 dev_info(&adapter->pdev->dev, "tx locked\n");
2218 return NETDEV_TX_LOCKED;
2219 }
2220
2221 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2222 /* no enough descriptor, just stop queue */
2223 netif_stop_queue(netdev);
2224 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2225 return NETDEV_TX_BUSY;
2226 }
2227
2228 tpd = atl1c_get_tpd(adapter, type);
2229
2230 /* do TSO and check sum */
2231 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2232 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2233 dev_kfree_skb_any(skb);
2234 return NETDEV_TX_OK;
2235 }
2236
2237 if (unlikely(vlan_tx_tag_present(skb))) {
2238 u16 vlan = vlan_tx_tag_get(skb);
2239 __le16 tag;
2240
2241 vlan = cpu_to_le16(vlan);
2242 AT_VLAN_TO_TAG(vlan, tag);
2243 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2244 tpd->vlan_tag = tag;
2245 }
2246
2247 if (skb_network_offset(skb) != ETH_HLEN)
2248 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2249
2250 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2251 netif_info(adapter, tx_done, adapter->netdev,
2252 "tx-skb droppted due to dma error\n");
2253 /* roll back tpd/buffer */
2254 atl1c_tx_rollback(adapter, tpd, type);
2255 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2256 dev_kfree_skb_any(skb);
2257 } else {
2258 atl1c_tx_queue(adapter, skb, tpd, type);
2259 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2260 }
2261
2262 return NETDEV_TX_OK;
2263 }
2264
atl1c_free_irq(struct atl1c_adapter * adapter)2265 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2266 {
2267 struct net_device *netdev = adapter->netdev;
2268
2269 free_irq(adapter->pdev->irq, netdev);
2270
2271 if (adapter->have_msi)
2272 pci_disable_msi(adapter->pdev);
2273 }
2274
atl1c_request_irq(struct atl1c_adapter * adapter)2275 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2276 {
2277 struct pci_dev *pdev = adapter->pdev;
2278 struct net_device *netdev = adapter->netdev;
2279 int flags = 0;
2280 int err = 0;
2281
2282 adapter->have_msi = true;
2283 err = pci_enable_msi(adapter->pdev);
2284 if (err) {
2285 if (netif_msg_ifup(adapter))
2286 dev_err(&pdev->dev,
2287 "Unable to allocate MSI interrupt Error: %d\n",
2288 err);
2289 adapter->have_msi = false;
2290 }
2291
2292 if (!adapter->have_msi)
2293 flags |= IRQF_SHARED;
2294 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2295 netdev->name, netdev);
2296 if (err) {
2297 if (netif_msg_ifup(adapter))
2298 dev_err(&pdev->dev,
2299 "Unable to allocate interrupt Error: %d\n",
2300 err);
2301 if (adapter->have_msi)
2302 pci_disable_msi(adapter->pdev);
2303 return err;
2304 }
2305 if (netif_msg_ifup(adapter))
2306 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2307 return err;
2308 }
2309
2310
atl1c_reset_dma_ring(struct atl1c_adapter * adapter)2311 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2312 {
2313 /* release tx-pending skbs and reset tx/rx ring index */
2314 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2315 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2316 atl1c_clean_rx_ring(adapter);
2317 }
2318
atl1c_up(struct atl1c_adapter * adapter)2319 static int atl1c_up(struct atl1c_adapter *adapter)
2320 {
2321 struct net_device *netdev = adapter->netdev;
2322 int err;
2323
2324 netif_carrier_off(netdev);
2325
2326 err = atl1c_configure(adapter);
2327 if (unlikely(err))
2328 goto err_up;
2329
2330 err = atl1c_request_irq(adapter);
2331 if (unlikely(err))
2332 goto err_up;
2333
2334 atl1c_check_link_status(adapter);
2335 clear_bit(__AT_DOWN, &adapter->flags);
2336 napi_enable(&adapter->napi);
2337 atl1c_irq_enable(adapter);
2338 netif_start_queue(netdev);
2339 return err;
2340
2341 err_up:
2342 atl1c_clean_rx_ring(adapter);
2343 return err;
2344 }
2345
atl1c_down(struct atl1c_adapter * adapter)2346 static void atl1c_down(struct atl1c_adapter *adapter)
2347 {
2348 struct net_device *netdev = adapter->netdev;
2349
2350 atl1c_del_timer(adapter);
2351 adapter->work_event = 0; /* clear all event */
2352 /* signal that we're down so the interrupt handler does not
2353 * reschedule our watchdog timer */
2354 set_bit(__AT_DOWN, &adapter->flags);
2355 netif_carrier_off(netdev);
2356 napi_disable(&adapter->napi);
2357 atl1c_irq_disable(adapter);
2358 atl1c_free_irq(adapter);
2359 /* disable ASPM if device inactive */
2360 atl1c_disable_l0s_l1(&adapter->hw);
2361 /* reset MAC to disable all RX/TX */
2362 atl1c_reset_mac(&adapter->hw);
2363 msleep(1);
2364
2365 adapter->link_speed = SPEED_0;
2366 adapter->link_duplex = -1;
2367 atl1c_reset_dma_ring(adapter);
2368 }
2369
2370 /**
2371 * atl1c_open - Called when a network interface is made active
2372 * @netdev: network interface device structure
2373 *
2374 * Returns 0 on success, negative value on failure
2375 *
2376 * The open entry point is called when a network interface is made
2377 * active by the system (IFF_UP). At this point all resources needed
2378 * for transmit and receive operations are allocated, the interrupt
2379 * handler is registered with the OS, the watchdog timer is started,
2380 * and the stack is notified that the interface is ready.
2381 */
atl1c_open(struct net_device * netdev)2382 static int atl1c_open(struct net_device *netdev)
2383 {
2384 struct atl1c_adapter *adapter = netdev_priv(netdev);
2385 int err;
2386
2387 /* disallow open during test */
2388 if (test_bit(__AT_TESTING, &adapter->flags))
2389 return -EBUSY;
2390
2391 /* allocate rx/tx dma buffer & descriptors */
2392 err = atl1c_setup_ring_resources(adapter);
2393 if (unlikely(err))
2394 return err;
2395
2396 err = atl1c_up(adapter);
2397 if (unlikely(err))
2398 goto err_up;
2399
2400 return 0;
2401
2402 err_up:
2403 atl1c_free_irq(adapter);
2404 atl1c_free_ring_resources(adapter);
2405 atl1c_reset_mac(&adapter->hw);
2406 return err;
2407 }
2408
2409 /**
2410 * atl1c_close - Disables a network interface
2411 * @netdev: network interface device structure
2412 *
2413 * Returns 0, this is not allowed to fail
2414 *
2415 * The close entry point is called when an interface is de-activated
2416 * by the OS. The hardware is still under the drivers control, but
2417 * needs to be disabled. A global MAC reset is issued to stop the
2418 * hardware, and all transmit and receive resources are freed.
2419 */
atl1c_close(struct net_device * netdev)2420 static int atl1c_close(struct net_device *netdev)
2421 {
2422 struct atl1c_adapter *adapter = netdev_priv(netdev);
2423
2424 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2425 set_bit(__AT_DOWN, &adapter->flags);
2426 cancel_work_sync(&adapter->common_task);
2427 atl1c_down(adapter);
2428 atl1c_free_ring_resources(adapter);
2429 return 0;
2430 }
2431
atl1c_suspend(struct device * dev)2432 static int atl1c_suspend(struct device *dev)
2433 {
2434 struct pci_dev *pdev = to_pci_dev(dev);
2435 struct net_device *netdev = pci_get_drvdata(pdev);
2436 struct atl1c_adapter *adapter = netdev_priv(netdev);
2437 struct atl1c_hw *hw = &adapter->hw;
2438 u32 wufc = adapter->wol;
2439
2440 atl1c_disable_l0s_l1(hw);
2441 if (netif_running(netdev)) {
2442 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2443 atl1c_down(adapter);
2444 }
2445 netif_device_detach(netdev);
2446
2447 if (wufc)
2448 if (atl1c_phy_to_ps_link(hw) != 0)
2449 dev_dbg(&pdev->dev, "phy power saving failed");
2450
2451 atl1c_power_saving(hw, wufc);
2452
2453 return 0;
2454 }
2455
2456 #ifdef CONFIG_PM_SLEEP
atl1c_resume(struct device * dev)2457 static int atl1c_resume(struct device *dev)
2458 {
2459 struct pci_dev *pdev = to_pci_dev(dev);
2460 struct net_device *netdev = pci_get_drvdata(pdev);
2461 struct atl1c_adapter *adapter = netdev_priv(netdev);
2462
2463 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2464 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2465
2466 atl1c_phy_reset(&adapter->hw);
2467 atl1c_reset_mac(&adapter->hw);
2468 atl1c_phy_init(&adapter->hw);
2469
2470 #if 0
2471 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2472 pm_data &= ~PM_CTRLSTAT_PME_EN;
2473 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2474 #endif
2475
2476 netif_device_attach(netdev);
2477 if (netif_running(netdev))
2478 atl1c_up(adapter);
2479
2480 return 0;
2481 }
2482 #endif
2483
atl1c_shutdown(struct pci_dev * pdev)2484 static void atl1c_shutdown(struct pci_dev *pdev)
2485 {
2486 struct net_device *netdev = pci_get_drvdata(pdev);
2487 struct atl1c_adapter *adapter = netdev_priv(netdev);
2488
2489 atl1c_suspend(&pdev->dev);
2490 pci_wake_from_d3(pdev, adapter->wol);
2491 pci_set_power_state(pdev, PCI_D3hot);
2492 }
2493
2494 static const struct net_device_ops atl1c_netdev_ops = {
2495 .ndo_open = atl1c_open,
2496 .ndo_stop = atl1c_close,
2497 .ndo_validate_addr = eth_validate_addr,
2498 .ndo_start_xmit = atl1c_xmit_frame,
2499 .ndo_set_mac_address = atl1c_set_mac_addr,
2500 .ndo_set_rx_mode = atl1c_set_multi,
2501 .ndo_change_mtu = atl1c_change_mtu,
2502 .ndo_fix_features = atl1c_fix_features,
2503 .ndo_set_features = atl1c_set_features,
2504 .ndo_do_ioctl = atl1c_ioctl,
2505 .ndo_tx_timeout = atl1c_tx_timeout,
2506 .ndo_get_stats = atl1c_get_stats,
2507 #ifdef CONFIG_NET_POLL_CONTROLLER
2508 .ndo_poll_controller = atl1c_netpoll,
2509 #endif
2510 };
2511
atl1c_init_netdev(struct net_device * netdev,struct pci_dev * pdev)2512 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2513 {
2514 SET_NETDEV_DEV(netdev, &pdev->dev);
2515 pci_set_drvdata(pdev, netdev);
2516
2517 netdev->netdev_ops = &atl1c_netdev_ops;
2518 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2519 atl1c_set_ethtool_ops(netdev);
2520
2521 /* TODO: add when ready */
2522 netdev->hw_features = NETIF_F_SG |
2523 NETIF_F_HW_CSUM |
2524 NETIF_F_HW_VLAN_CTAG_RX |
2525 NETIF_F_TSO |
2526 NETIF_F_TSO6;
2527 netdev->features = netdev->hw_features |
2528 NETIF_F_HW_VLAN_CTAG_TX;
2529 return 0;
2530 }
2531
2532 /**
2533 * atl1c_probe - Device Initialization Routine
2534 * @pdev: PCI device information struct
2535 * @ent: entry in atl1c_pci_tbl
2536 *
2537 * Returns 0 on success, negative on failure
2538 *
2539 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2540 * The OS initialization, configuring of the adapter private structure,
2541 * and a hardware reset occur.
2542 */
atl1c_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2543 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2544 {
2545 struct net_device *netdev;
2546 struct atl1c_adapter *adapter;
2547 static int cards_found;
2548
2549 int err = 0;
2550
2551 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2552 err = pci_enable_device_mem(pdev);
2553 if (err) {
2554 dev_err(&pdev->dev, "cannot enable PCI device\n");
2555 return err;
2556 }
2557
2558 /*
2559 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2560 * shared register for the high 32 bits, so only a single, aligned,
2561 * 4 GB physical address range can be used at a time.
2562 *
2563 * Supporting 64-bit DMA on this hardware is more trouble than it's
2564 * worth. It is far easier to limit to 32-bit DMA than update
2565 * various kernel subsystems to support the mechanics required by a
2566 * fixed-high-32-bit system.
2567 */
2568 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2569 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2570 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2571 goto err_dma;
2572 }
2573
2574 err = pci_request_regions(pdev, atl1c_driver_name);
2575 if (err) {
2576 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2577 goto err_pci_reg;
2578 }
2579
2580 pci_set_master(pdev);
2581
2582 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2583 if (netdev == NULL) {
2584 err = -ENOMEM;
2585 goto err_alloc_etherdev;
2586 }
2587
2588 err = atl1c_init_netdev(netdev, pdev);
2589 if (err) {
2590 dev_err(&pdev->dev, "init netdevice failed\n");
2591 goto err_init_netdev;
2592 }
2593 adapter = netdev_priv(netdev);
2594 adapter->bd_number = cards_found;
2595 adapter->netdev = netdev;
2596 adapter->pdev = pdev;
2597 adapter->hw.adapter = adapter;
2598 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2599 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2600 if (!adapter->hw.hw_addr) {
2601 err = -EIO;
2602 dev_err(&pdev->dev, "cannot map device registers\n");
2603 goto err_ioremap;
2604 }
2605
2606 /* init mii data */
2607 adapter->mii.dev = netdev;
2608 adapter->mii.mdio_read = atl1c_mdio_read;
2609 adapter->mii.mdio_write = atl1c_mdio_write;
2610 adapter->mii.phy_id_mask = 0x1f;
2611 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2612 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2613 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2614 (unsigned long)adapter);
2615 /* setup the private structure */
2616 err = atl1c_sw_init(adapter);
2617 if (err) {
2618 dev_err(&pdev->dev, "net device private data init failed\n");
2619 goto err_sw_init;
2620 }
2621 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2622
2623 /* Init GPHY as early as possible due to power saving issue */
2624 atl1c_phy_reset(&adapter->hw);
2625
2626 err = atl1c_reset_mac(&adapter->hw);
2627 if (err) {
2628 err = -EIO;
2629 goto err_reset;
2630 }
2631
2632 /* reset the controller to
2633 * put the device in a known good starting state */
2634 err = atl1c_phy_init(&adapter->hw);
2635 if (err) {
2636 err = -EIO;
2637 goto err_reset;
2638 }
2639 if (atl1c_read_mac_addr(&adapter->hw)) {
2640 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2641 netdev->addr_assign_type = NET_ADDR_RANDOM;
2642 }
2643 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2644 if (netif_msg_probe(adapter))
2645 dev_dbg(&pdev->dev, "mac address : %pM\n",
2646 adapter->hw.mac_addr);
2647
2648 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2649 INIT_WORK(&adapter->common_task, atl1c_common_task);
2650 adapter->work_event = 0;
2651 err = register_netdev(netdev);
2652 if (err) {
2653 dev_err(&pdev->dev, "register netdevice failed\n");
2654 goto err_register;
2655 }
2656
2657 if (netif_msg_probe(adapter))
2658 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2659 cards_found++;
2660 return 0;
2661
2662 err_reset:
2663 err_register:
2664 err_sw_init:
2665 iounmap(adapter->hw.hw_addr);
2666 err_init_netdev:
2667 err_ioremap:
2668 free_netdev(netdev);
2669 err_alloc_etherdev:
2670 pci_release_regions(pdev);
2671 err_pci_reg:
2672 err_dma:
2673 pci_disable_device(pdev);
2674 return err;
2675 }
2676
2677 /**
2678 * atl1c_remove - Device Removal Routine
2679 * @pdev: PCI device information struct
2680 *
2681 * atl1c_remove is called by the PCI subsystem to alert the driver
2682 * that it should release a PCI device. The could be caused by a
2683 * Hot-Plug event, or because the driver is going to be removed from
2684 * memory.
2685 */
atl1c_remove(struct pci_dev * pdev)2686 static void atl1c_remove(struct pci_dev *pdev)
2687 {
2688 struct net_device *netdev = pci_get_drvdata(pdev);
2689 struct atl1c_adapter *adapter = netdev_priv(netdev);
2690
2691 unregister_netdev(netdev);
2692 /* restore permanent address */
2693 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2694 atl1c_phy_disable(&adapter->hw);
2695
2696 iounmap(adapter->hw.hw_addr);
2697
2698 pci_release_regions(pdev);
2699 pci_disable_device(pdev);
2700 free_netdev(netdev);
2701 }
2702
2703 /**
2704 * atl1c_io_error_detected - called when PCI error is detected
2705 * @pdev: Pointer to PCI device
2706 * @state: The current pci connection state
2707 *
2708 * This function is called after a PCI bus error affecting
2709 * this device has been detected.
2710 */
atl1c_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)2711 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2712 pci_channel_state_t state)
2713 {
2714 struct net_device *netdev = pci_get_drvdata(pdev);
2715 struct atl1c_adapter *adapter = netdev_priv(netdev);
2716
2717 netif_device_detach(netdev);
2718
2719 if (state == pci_channel_io_perm_failure)
2720 return PCI_ERS_RESULT_DISCONNECT;
2721
2722 if (netif_running(netdev))
2723 atl1c_down(adapter);
2724
2725 pci_disable_device(pdev);
2726
2727 /* Request a slot slot reset. */
2728 return PCI_ERS_RESULT_NEED_RESET;
2729 }
2730
2731 /**
2732 * atl1c_io_slot_reset - called after the pci bus has been reset.
2733 * @pdev: Pointer to PCI device
2734 *
2735 * Restart the card from scratch, as if from a cold-boot. Implementation
2736 * resembles the first-half of the e1000_resume routine.
2737 */
atl1c_io_slot_reset(struct pci_dev * pdev)2738 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2739 {
2740 struct net_device *netdev = pci_get_drvdata(pdev);
2741 struct atl1c_adapter *adapter = netdev_priv(netdev);
2742
2743 if (pci_enable_device(pdev)) {
2744 if (netif_msg_hw(adapter))
2745 dev_err(&pdev->dev,
2746 "Cannot re-enable PCI device after reset\n");
2747 return PCI_ERS_RESULT_DISCONNECT;
2748 }
2749 pci_set_master(pdev);
2750
2751 pci_enable_wake(pdev, PCI_D3hot, 0);
2752 pci_enable_wake(pdev, PCI_D3cold, 0);
2753
2754 atl1c_reset_mac(&adapter->hw);
2755
2756 return PCI_ERS_RESULT_RECOVERED;
2757 }
2758
2759 /**
2760 * atl1c_io_resume - called when traffic can start flowing again.
2761 * @pdev: Pointer to PCI device
2762 *
2763 * This callback is called when the error recovery driver tells us that
2764 * its OK to resume normal operation. Implementation resembles the
2765 * second-half of the atl1c_resume routine.
2766 */
atl1c_io_resume(struct pci_dev * pdev)2767 static void atl1c_io_resume(struct pci_dev *pdev)
2768 {
2769 struct net_device *netdev = pci_get_drvdata(pdev);
2770 struct atl1c_adapter *adapter = netdev_priv(netdev);
2771
2772 if (netif_running(netdev)) {
2773 if (atl1c_up(adapter)) {
2774 if (netif_msg_hw(adapter))
2775 dev_err(&pdev->dev,
2776 "Cannot bring device back up after reset\n");
2777 return;
2778 }
2779 }
2780
2781 netif_device_attach(netdev);
2782 }
2783
2784 static const struct pci_error_handlers atl1c_err_handler = {
2785 .error_detected = atl1c_io_error_detected,
2786 .slot_reset = atl1c_io_slot_reset,
2787 .resume = atl1c_io_resume,
2788 };
2789
2790 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2791
2792 static struct pci_driver atl1c_driver = {
2793 .name = atl1c_driver_name,
2794 .id_table = atl1c_pci_tbl,
2795 .probe = atl1c_probe,
2796 .remove = atl1c_remove,
2797 .shutdown = atl1c_shutdown,
2798 .err_handler = &atl1c_err_handler,
2799 .driver.pm = &atl1c_pm_ops,
2800 };
2801
2802 module_pci_driver(atl1c_driver);
2803