1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
4 *
5 * Derived from Intel e1000 driver
6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
7 */
8
9 #include "atl1c.h"
10
11 char atl1c_driver_name[] = "atl1c";
12
13 /*
14 * atl1c_pci_tbl - PCI Device ID Table
15 *
16 * Wildcard entries (PCI_ANY_ID) should come last
17 * Last entry must be all 0s
18 *
19 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
20 * Class, Class Mask, private data (not used) }
21 */
22 static const struct pci_device_id atl1c_pci_tbl[] = {
23 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
24 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
25 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
26 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
27 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
28 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
29 /* required last entry */
30 { 0 }
31 };
32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
33
34 MODULE_AUTHOR("Jie Yang");
35 MODULE_AUTHOR("Qualcomm Atheros Inc.");
36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
37 MODULE_LICENSE("GPL");
38
39 struct atl1c_qregs {
40 u16 tpd_addr_lo;
41 u16 tpd_prod;
42 u16 tpd_cons;
43 u16 rfd_addr_lo;
44 u16 rrd_addr_lo;
45 u16 rfd_prod;
46 u32 tx_isr;
47 u32 rx_isr;
48 };
49
50 static struct atl1c_qregs atl1c_qregs[AT_MAX_TRANSMIT_QUEUE] = {
51 {
52 REG_TPD_PRI0_ADDR_LO, REG_TPD_PRI0_PIDX, REG_TPD_PRI0_CIDX,
53 REG_RFD0_HEAD_ADDR_LO, REG_RRD0_HEAD_ADDR_LO,
54 REG_MB_RFD0_PROD_IDX, ISR_TX_PKT_0, ISR_RX_PKT_0
55 },
56 {
57 REG_TPD_PRI1_ADDR_LO, REG_TPD_PRI1_PIDX, REG_TPD_PRI1_CIDX,
58 REG_RFD1_HEAD_ADDR_LO, REG_RRD1_HEAD_ADDR_LO,
59 REG_MB_RFD1_PROD_IDX, ISR_TX_PKT_1, ISR_RX_PKT_1
60 },
61 {
62 REG_TPD_PRI2_ADDR_LO, REG_TPD_PRI2_PIDX, REG_TPD_PRI2_CIDX,
63 REG_RFD2_HEAD_ADDR_LO, REG_RRD2_HEAD_ADDR_LO,
64 REG_MB_RFD2_PROD_IDX, ISR_TX_PKT_2, ISR_RX_PKT_2
65 },
66 {
67 REG_TPD_PRI3_ADDR_LO, REG_TPD_PRI3_PIDX, REG_TPD_PRI3_CIDX,
68 REG_RFD3_HEAD_ADDR_LO, REG_RRD3_HEAD_ADDR_LO,
69 REG_MB_RFD3_PROD_IDX, ISR_TX_PKT_3, ISR_RX_PKT_3
70 },
71 };
72
73 static int atl1c_stop_mac(struct atl1c_hw *hw);
74 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
75 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
76 static void atl1c_start_mac(struct atl1c_adapter *adapter);
77 static int atl1c_up(struct atl1c_adapter *adapter);
78 static void atl1c_down(struct atl1c_adapter *adapter);
79 static int atl1c_reset_mac(struct atl1c_hw *hw);
80 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
81 static int atl1c_configure(struct atl1c_adapter *adapter);
82 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
83 bool napi_mode);
84
85
86 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
87 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
atl1c_pcie_patch(struct atl1c_hw * hw)88 static void atl1c_pcie_patch(struct atl1c_hw *hw)
89 {
90 u32 mst_data, data;
91
92 /* pclk sel could switch to 25M */
93 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
94 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
95 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
96
97 /* WoL/PCIE related settings */
98 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
99 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
100 data |= PCIE_PHYMISC_FORCE_RCV_DET;
101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
102 } else { /* new dev set bit5 of MASTER */
103 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
104 AT_WRITE_REG(hw, REG_MASTER_CTRL,
105 mst_data | MASTER_CTRL_WAKEN_25M);
106 }
107 /* aspm/PCIE setting only for l2cb 1.0 */
108 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
109 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
110 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
111 L2CB1_PCIE_PHYMISC2_CDR_BW);
112 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
113 L2CB1_PCIE_PHYMISC2_L0S_TH);
114 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
115 /* extend L1 sync timer */
116 AT_READ_REG(hw, REG_LINK_CTRL, &data);
117 data |= LINK_CTRL_EXT_SYNC;
118 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
119 }
120 /* l2cb 1.x & l1d 1.x */
121 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
122 AT_READ_REG(hw, REG_PM_CTRL, &data);
123 data |= PM_CTRL_L0S_BUFSRX_EN;
124 AT_WRITE_REG(hw, REG_PM_CTRL, data);
125 /* clear vendor msg */
126 AT_READ_REG(hw, REG_DMA_DBG, &data);
127 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
128 }
129 }
130
131 /* FIXME: no need any more ? */
132 /*
133 * atl1c_init_pcie - init PCIE module
134 */
atl1c_reset_pcie(struct atl1c_hw * hw,u32 flag)135 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
136 {
137 u32 data;
138 u32 pci_cmd;
139 struct pci_dev *pdev = hw->adapter->pdev;
140 int pos;
141
142 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
143 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
144 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
145 PCI_COMMAND_IO);
146 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
147
148 /*
149 * Clear any PowerSaveing Settings
150 */
151 pci_enable_wake(pdev, PCI_D3hot, 0);
152 pci_enable_wake(pdev, PCI_D3cold, 0);
153 /* wol sts read-clear */
154 AT_READ_REG(hw, REG_WOL_CTRL, &data);
155 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
156
157 /*
158 * Mask some pcie error bits
159 */
160 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
161 if (pos) {
162 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
163 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
164 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
165 }
166 /* clear error status */
167 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
168 PCI_EXP_DEVSTA_NFED |
169 PCI_EXP_DEVSTA_FED |
170 PCI_EXP_DEVSTA_CED |
171 PCI_EXP_DEVSTA_URD);
172
173 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
174 data &= ~LTSSM_ID_EN_WRO;
175 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
176
177 atl1c_pcie_patch(hw);
178 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
179 atl1c_disable_l0s_l1(hw);
180
181 msleep(5);
182 }
183
184 /**
185 * atl1c_irq_enable - Enable default interrupt generation settings
186 * @adapter: board private structure
187 */
atl1c_irq_enable(struct atl1c_adapter * adapter)188 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
189 {
190 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
191 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
192 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
193 AT_WRITE_FLUSH(&adapter->hw);
194 }
195 }
196
197 /**
198 * atl1c_irq_disable - Mask off interrupt generation on the NIC
199 * @adapter: board private structure
200 */
atl1c_irq_disable(struct atl1c_adapter * adapter)201 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
202 {
203 atomic_inc(&adapter->irq_sem);
204 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
205 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
206 AT_WRITE_FLUSH(&adapter->hw);
207 synchronize_irq(adapter->pdev->irq);
208 }
209
210 /*
211 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
212 * of the idle status register until the device is actually idle
213 */
atl1c_wait_until_idle(struct atl1c_hw * hw,u32 modu_ctrl)214 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
215 {
216 int timeout;
217 u32 data;
218
219 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
220 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
221 if ((data & modu_ctrl) == 0)
222 return 0;
223 msleep(1);
224 }
225 return data;
226 }
227
228 /**
229 * atl1c_phy_config - Timer Call-back
230 * @t: timer list containing pointer to netdev cast into an unsigned long
231 */
atl1c_phy_config(struct timer_list * t)232 static void atl1c_phy_config(struct timer_list *t)
233 {
234 struct atl1c_adapter *adapter = from_timer(adapter, t,
235 phy_config_timer);
236 struct atl1c_hw *hw = &adapter->hw;
237 unsigned long flags;
238
239 spin_lock_irqsave(&adapter->mdio_lock, flags);
240 atl1c_restart_autoneg(hw);
241 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
242 }
243
atl1c_reinit_locked(struct atl1c_adapter * adapter)244 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
245 {
246 atl1c_down(adapter);
247 atl1c_up(adapter);
248 clear_bit(__AT_RESETTING, &adapter->flags);
249 }
250
atl1c_check_link_status(struct atl1c_adapter * adapter)251 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
252 {
253 struct atl1c_hw *hw = &adapter->hw;
254 struct net_device *netdev = adapter->netdev;
255 struct pci_dev *pdev = adapter->pdev;
256 int err;
257 unsigned long flags;
258 u16 speed, duplex;
259 bool link;
260
261 spin_lock_irqsave(&adapter->mdio_lock, flags);
262 link = atl1c_get_link_status(hw);
263 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
264
265 if (!link) {
266 /* link down */
267 netif_carrier_off(netdev);
268 hw->hibernate = true;
269 if (atl1c_reset_mac(hw) != 0)
270 if (netif_msg_hw(adapter))
271 dev_warn(&pdev->dev, "reset mac failed\n");
272 atl1c_set_aspm(hw, SPEED_0);
273 atl1c_post_phy_linkchg(hw, SPEED_0);
274 atl1c_reset_dma_ring(adapter);
275 atl1c_configure(adapter);
276 } else {
277 /* Link Up */
278 hw->hibernate = false;
279 spin_lock_irqsave(&adapter->mdio_lock, flags);
280 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
281 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
282 if (unlikely(err))
283 return;
284 /* link result is our setting */
285 if (adapter->link_speed != speed ||
286 adapter->link_duplex != duplex) {
287 adapter->link_speed = speed;
288 adapter->link_duplex = duplex;
289 atl1c_set_aspm(hw, speed);
290 atl1c_post_phy_linkchg(hw, speed);
291 atl1c_start_mac(adapter);
292 if (netif_msg_link(adapter))
293 dev_info(&pdev->dev,
294 "%s: %s NIC Link is Up<%d Mbps %s>\n",
295 atl1c_driver_name, netdev->name,
296 adapter->link_speed,
297 adapter->link_duplex == FULL_DUPLEX ?
298 "Full Duplex" : "Half Duplex");
299 }
300 if (!netif_carrier_ok(netdev))
301 netif_carrier_on(netdev);
302 }
303 }
304
atl1c_link_chg_event(struct atl1c_adapter * adapter)305 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
306 {
307 struct net_device *netdev = adapter->netdev;
308 struct pci_dev *pdev = adapter->pdev;
309 bool link;
310
311 spin_lock(&adapter->mdio_lock);
312 link = atl1c_get_link_status(&adapter->hw);
313 spin_unlock(&adapter->mdio_lock);
314 /* notify upper layer link down ASAP */
315 if (!link) {
316 if (netif_carrier_ok(netdev)) {
317 /* old link state: Up */
318 netif_carrier_off(netdev);
319 if (netif_msg_link(adapter))
320 dev_info(&pdev->dev,
321 "%s: %s NIC Link is Down\n",
322 atl1c_driver_name, netdev->name);
323 adapter->link_speed = SPEED_0;
324 }
325 }
326
327 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
328 schedule_work(&adapter->common_task);
329 }
330
atl1c_common_task(struct work_struct * work)331 static void atl1c_common_task(struct work_struct *work)
332 {
333 struct atl1c_adapter *adapter;
334 struct net_device *netdev;
335
336 adapter = container_of(work, struct atl1c_adapter, common_task);
337 netdev = adapter->netdev;
338
339 if (test_bit(__AT_DOWN, &adapter->flags))
340 return;
341
342 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
343 netif_device_detach(netdev);
344 atl1c_down(adapter);
345 atl1c_up(adapter);
346 netif_device_attach(netdev);
347 }
348
349 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
350 &adapter->work_event)) {
351 atl1c_irq_disable(adapter);
352 atl1c_check_link_status(adapter);
353 atl1c_irq_enable(adapter);
354 }
355 }
356
357
atl1c_del_timer(struct atl1c_adapter * adapter)358 static void atl1c_del_timer(struct atl1c_adapter *adapter)
359 {
360 del_timer_sync(&adapter->phy_config_timer);
361 }
362
363
364 /**
365 * atl1c_tx_timeout - Respond to a Tx Hang
366 * @netdev: network interface device structure
367 * @txqueue: index of hanging tx queue
368 */
atl1c_tx_timeout(struct net_device * netdev,unsigned int txqueue)369 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue)
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_addr - 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 eth_hw_addr_set(netdev, addr->sa_data);
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 int mtu = dev->mtu;
487
488 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
489 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
490 }
491
atl1c_fix_features(struct net_device * netdev,netdev_features_t features)492 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
493 netdev_features_t features)
494 {
495 struct atl1c_adapter *adapter = netdev_priv(netdev);
496 struct atl1c_hw *hw = &adapter->hw;
497
498 /*
499 * Since there is no support for separate rx/tx vlan accel
500 * enable/disable make sure tx flag is always in same state as rx.
501 */
502 if (features & NETIF_F_HW_VLAN_CTAG_RX)
503 features |= NETIF_F_HW_VLAN_CTAG_TX;
504 else
505 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
506
507 if (hw->nic_type != athr_mt) {
508 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
509 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
510 }
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
atl1c_set_max_mtu(struct net_device * netdev)526 static void atl1c_set_max_mtu(struct net_device *netdev)
527 {
528 struct atl1c_adapter *adapter = netdev_priv(netdev);
529 struct atl1c_hw *hw = &adapter->hw;
530
531 switch (hw->nic_type) {
532 /* These (GbE) devices support jumbo packets, max_mtu 6122 */
533 case athr_l1c:
534 case athr_l1d:
535 case athr_l1d_2:
536 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
537 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
538 break;
539 case athr_mt:
540 netdev->max_mtu = 9500;
541 break;
542 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
543 default:
544 netdev->max_mtu = ETH_DATA_LEN;
545 break;
546 }
547 }
548
549 /**
550 * atl1c_change_mtu - Change the Maximum Transfer Unit
551 * @netdev: network interface device structure
552 * @new_mtu: new value for maximum frame size
553 *
554 * Returns 0 on success, negative on failure
555 */
atl1c_change_mtu(struct net_device * netdev,int new_mtu)556 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
557 {
558 struct atl1c_adapter *adapter = netdev_priv(netdev);
559
560 /* set MTU */
561 if (netif_running(netdev)) {
562 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
563 msleep(1);
564 WRITE_ONCE(netdev->mtu, new_mtu);
565 adapter->hw.max_frame_size = new_mtu;
566 atl1c_set_rxbufsize(adapter, netdev);
567 atl1c_down(adapter);
568 netdev_update_features(netdev);
569 atl1c_up(adapter);
570 clear_bit(__AT_RESETTING, &adapter->flags);
571 }
572 return 0;
573 }
574
575 /*
576 * caller should hold mdio_lock
577 */
atl1c_mdio_read(struct net_device * netdev,int phy_id,int reg_num)578 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
579 {
580 struct atl1c_adapter *adapter = netdev_priv(netdev);
581 u16 result;
582
583 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
584 return result;
585 }
586
atl1c_mdio_write(struct net_device * netdev,int phy_id,int reg_num,int val)587 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
588 int reg_num, int val)
589 {
590 struct atl1c_adapter *adapter = netdev_priv(netdev);
591
592 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
593 }
594
atl1c_mii_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)595 static int atl1c_mii_ioctl(struct net_device *netdev,
596 struct ifreq *ifr, int cmd)
597 {
598 struct atl1c_adapter *adapter = netdev_priv(netdev);
599 struct pci_dev *pdev = adapter->pdev;
600 struct mii_ioctl_data *data = if_mii(ifr);
601 unsigned long flags;
602 int retval = 0;
603
604 if (!netif_running(netdev))
605 return -EINVAL;
606
607 spin_lock_irqsave(&adapter->mdio_lock, flags);
608 switch (cmd) {
609 case SIOCGMIIPHY:
610 data->phy_id = 0;
611 break;
612
613 case SIOCGMIIREG:
614 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
615 &data->val_out)) {
616 retval = -EIO;
617 goto out;
618 }
619 break;
620
621 case SIOCSMIIREG:
622 if (data->reg_num & ~(0x1F)) {
623 retval = -EFAULT;
624 goto out;
625 }
626
627 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
628 data->reg_num, data->val_in);
629 if (atl1c_write_phy_reg(&adapter->hw,
630 data->reg_num, data->val_in)) {
631 retval = -EIO;
632 goto out;
633 }
634 break;
635
636 default:
637 retval = -EOPNOTSUPP;
638 break;
639 }
640 out:
641 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
642 return retval;
643 }
644
atl1c_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)645 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
646 {
647 switch (cmd) {
648 case SIOCGMIIPHY:
649 case SIOCGMIIREG:
650 case SIOCSMIIREG:
651 return atl1c_mii_ioctl(netdev, ifr, cmd);
652 default:
653 return -EOPNOTSUPP;
654 }
655 }
656
657 /**
658 * atl1c_alloc_queues - Allocate memory for all rings
659 * @adapter: board private structure to initialize
660 *
661 */
atl1c_alloc_queues(struct atl1c_adapter * adapter)662 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
663 {
664 return 0;
665 }
666
atl1c_get_mac_type(struct pci_dev * pdev,u8 __iomem * hw_addr)667 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev,
668 u8 __iomem *hw_addr)
669 {
670 switch (pdev->device) {
671 case PCI_DEVICE_ID_ATTANSIC_L2C:
672 return athr_l2c;
673 case PCI_DEVICE_ID_ATTANSIC_L1C:
674 return athr_l1c;
675 case PCI_DEVICE_ID_ATHEROS_L2C_B:
676 return athr_l2c_b;
677 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
678 return athr_l2c_b2;
679 case PCI_DEVICE_ID_ATHEROS_L1D:
680 return athr_l1d;
681 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
682 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC)
683 return athr_mt;
684 return athr_l1d_2;
685 default:
686 return athr_l1c;
687 }
688 }
689
atl1c_setup_mac_funcs(struct atl1c_hw * hw)690 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
691 {
692 u32 link_ctrl_data;
693
694 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
695
696 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
697 ATL1C_TXQ_MODE_ENHANCE;
698 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
699 ATL1C_ASPM_L1_SUPPORT;
700 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
701
702 if (hw->nic_type == athr_l1c ||
703 hw->nic_type == athr_l1d ||
704 hw->nic_type == athr_l1d_2)
705 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
706 return 0;
707 }
708
709 struct atl1c_platform_patch {
710 u16 pci_did;
711 u8 pci_revid;
712 u16 subsystem_vid;
713 u16 subsystem_did;
714 u32 patch_flag;
715 #define ATL1C_LINK_PATCH 0x1
716 };
717 static const struct atl1c_platform_patch plats[] = {
718 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
719 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
720 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
721 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
722 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
723 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
724 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
725 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
726 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
727 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
728 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
729 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
730 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
731 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
732 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
733 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
734 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
735 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
736 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
737 {0},
738 };
739
atl1c_patch_assign(struct atl1c_hw * hw)740 static void atl1c_patch_assign(struct atl1c_hw *hw)
741 {
742 struct pci_dev *pdev = hw->adapter->pdev;
743 u32 misc_ctrl;
744 int i = 0;
745
746 hw->msi_lnkpatch = false;
747
748 while (plats[i].pci_did != 0) {
749 if (plats[i].pci_did == hw->device_id &&
750 plats[i].pci_revid == hw->revision_id &&
751 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
752 plats[i].subsystem_did == hw->subsystem_id) {
753 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
754 hw->msi_lnkpatch = true;
755 }
756 i++;
757 }
758
759 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
760 hw->revision_id == L2CB_V21) {
761 /* config access mode */
762 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
763 REG_PCIE_DEV_MISC_CTRL);
764 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
765 misc_ctrl &= ~0x100;
766 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
767 REG_PCIE_DEV_MISC_CTRL);
768 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
769 }
770 }
771 /**
772 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
773 * @adapter: board private structure to initialize
774 *
775 * atl1c_sw_init initializes the Adapter private data structure.
776 * Fields are initialized based on PCI device information and
777 * OS network device settings (MTU size).
778 */
atl1c_sw_init(struct atl1c_adapter * adapter)779 static int atl1c_sw_init(struct atl1c_adapter *adapter)
780 {
781 struct atl1c_hw *hw = &adapter->hw;
782 struct pci_dev *pdev = adapter->pdev;
783 u32 revision;
784 int i;
785
786 adapter->wol = 0;
787 device_set_wakeup_enable(&pdev->dev, false);
788 adapter->link_speed = SPEED_0;
789 adapter->link_duplex = FULL_DUPLEX;
790 adapter->tpd_ring[0].count = 1024;
791 adapter->rfd_ring[0].count = 512;
792
793 hw->vendor_id = pdev->vendor;
794 hw->device_id = pdev->device;
795 hw->subsystem_vendor_id = pdev->subsystem_vendor;
796 hw->subsystem_id = pdev->subsystem_device;
797 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
798 hw->revision_id = revision & 0xFF;
799 /* before link up, we assume hibernate is true */
800 hw->hibernate = true;
801 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
802 if (atl1c_setup_mac_funcs(hw) != 0) {
803 dev_err(&pdev->dev, "set mac function pointers failed\n");
804 return -1;
805 }
806 atl1c_patch_assign(hw);
807
808 hw->intr_mask = IMR_NORMAL_MASK;
809 for (i = 0; i < adapter->tx_queue_count; ++i)
810 hw->intr_mask |= atl1c_qregs[i].tx_isr;
811 for (i = 0; i < adapter->rx_queue_count; ++i)
812 hw->intr_mask |= atl1c_qregs[i].rx_isr;
813 hw->phy_configured = false;
814 hw->preamble_len = 7;
815 hw->max_frame_size = adapter->netdev->mtu;
816 hw->autoneg_advertised = ADVERTISED_Autoneg;
817 hw->indirect_tab = 0xE4E4E4E4;
818 hw->base_cpu = 0;
819
820 hw->ict = 50000; /* 100ms */
821 hw->smb_timer = 200000; /* 400ms */
822 hw->rx_imt = 200;
823 hw->tx_imt = 1000;
824
825 hw->tpd_burst = 5;
826 hw->rfd_burst = 8;
827 hw->dma_order = atl1c_dma_ord_out;
828 hw->dmar_block = atl1c_dma_req_1024;
829
830 if (atl1c_alloc_queues(adapter)) {
831 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
832 return -ENOMEM;
833 }
834 /* TODO */
835 atl1c_set_rxbufsize(adapter, adapter->netdev);
836 atomic_set(&adapter->irq_sem, 1);
837 spin_lock_init(&adapter->mdio_lock);
838 spin_lock_init(&adapter->hw.intr_mask_lock);
839 set_bit(__AT_DOWN, &adapter->flags);
840
841 return 0;
842 }
843
atl1c_clean_buffer(struct pci_dev * pdev,struct atl1c_buffer * buffer_info,int budget)844 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
845 struct atl1c_buffer *buffer_info,
846 int budget)
847 {
848 u16 pci_driection;
849 if (buffer_info->flags & ATL1C_BUFFER_FREE)
850 return;
851 if (buffer_info->dma) {
852 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
853 pci_driection = DMA_FROM_DEVICE;
854 else
855 pci_driection = DMA_TO_DEVICE;
856
857 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
858 dma_unmap_single(&pdev->dev, buffer_info->dma,
859 buffer_info->length, pci_driection);
860 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
861 dma_unmap_page(&pdev->dev, buffer_info->dma,
862 buffer_info->length, pci_driection);
863 }
864 if (buffer_info->skb)
865 napi_consume_skb(buffer_info->skb, budget);
866 buffer_info->dma = 0;
867 buffer_info->skb = NULL;
868 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
869 }
870 /**
871 * atl1c_clean_tx_ring - Free Tx-skb
872 * @adapter: board private structure
873 * @queue: idx of transmit queue
874 */
atl1c_clean_tx_ring(struct atl1c_adapter * adapter,u32 queue)875 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
876 u32 queue)
877 {
878 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
879 struct atl1c_buffer *buffer_info;
880 struct pci_dev *pdev = adapter->pdev;
881 u16 index, ring_count;
882
883 ring_count = tpd_ring->count;
884 for (index = 0; index < ring_count; index++) {
885 buffer_info = &tpd_ring->buffer_info[index];
886 atl1c_clean_buffer(pdev, buffer_info, 0);
887 }
888
889 netdev_tx_reset_queue(netdev_get_tx_queue(adapter->netdev, queue));
890
891 /* Zero out Tx-buffers */
892 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
893 ring_count);
894 atomic_set(&tpd_ring->next_to_clean, 0);
895 tpd_ring->next_to_use = 0;
896 }
897
898 /**
899 * atl1c_clean_rx_ring - Free rx-reservation skbs
900 * @adapter: board private structure
901 * @queue: idx of transmit queue
902 */
atl1c_clean_rx_ring(struct atl1c_adapter * adapter,u32 queue)903 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue)
904 {
905 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
906 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
907 struct atl1c_buffer *buffer_info;
908 struct pci_dev *pdev = adapter->pdev;
909 int j;
910
911 for (j = 0; j < rfd_ring->count; j++) {
912 buffer_info = &rfd_ring->buffer_info[j];
913 atl1c_clean_buffer(pdev, buffer_info, 0);
914 }
915 /* zero out the descriptor ring */
916 memset(rfd_ring->desc, 0, rfd_ring->size);
917 rfd_ring->next_to_clean = 0;
918 rfd_ring->next_to_use = 0;
919 rrd_ring->next_to_use = 0;
920 rrd_ring->next_to_clean = 0;
921 }
922
923 /*
924 * Read / Write Ptr Initialize:
925 */
atl1c_init_ring_ptrs(struct atl1c_adapter * adapter)926 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
927 {
928 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
929 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
930 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
931 struct atl1c_buffer *buffer_info;
932 int i, j;
933
934 for (i = 0; i < adapter->tx_queue_count; i++) {
935 tpd_ring[i].next_to_use = 0;
936 atomic_set(&tpd_ring[i].next_to_clean, 0);
937 buffer_info = tpd_ring[i].buffer_info;
938 for (j = 0; j < tpd_ring->count; j++)
939 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
940 ATL1C_BUFFER_FREE);
941 }
942 for (i = 0; i < adapter->rx_queue_count; i++) {
943 rfd_ring[i].next_to_use = 0;
944 rfd_ring[i].next_to_clean = 0;
945 rrd_ring[i].next_to_use = 0;
946 rrd_ring[i].next_to_clean = 0;
947 for (j = 0; j < rfd_ring[i].count; j++) {
948 buffer_info = &rfd_ring[i].buffer_info[j];
949 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
950 }
951 }
952 }
953
954 /**
955 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
956 * @adapter: board private structure
957 *
958 * Free all transmit software resources
959 */
atl1c_free_ring_resources(struct atl1c_adapter * adapter)960 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
961 {
962 struct pci_dev *pdev = adapter->pdev;
963
964 dma_free_coherent(&pdev->dev, adapter->ring_header.size,
965 adapter->ring_header.desc, adapter->ring_header.dma);
966 adapter->ring_header.desc = NULL;
967
968 /* Note: just free tdp_ring.buffer_info,
969 * it contain rfd_ring.buffer_info, do not double free
970 */
971 if (adapter->tpd_ring[0].buffer_info) {
972 kfree(adapter->tpd_ring[0].buffer_info);
973 adapter->tpd_ring[0].buffer_info = NULL;
974 }
975 }
976
977 /**
978 * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources
979 * @adapter: board private structure
980 *
981 * Return 0 on success, negative on failure
982 */
atl1c_setup_ring_resources(struct atl1c_adapter * adapter)983 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
984 {
985 struct pci_dev *pdev = adapter->pdev;
986 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
987 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
988 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
989 struct atl1c_ring_header *ring_header = &adapter->ring_header;
990 int tqc = adapter->tx_queue_count;
991 int rqc = adapter->rx_queue_count;
992 int size;
993 int i;
994 int count = 0;
995 u32 offset = 0;
996
997 /* Even though only one tpd queue is actually used, the "high"
998 * priority tpd queue also gets initialized
999 */
1000 if (tqc == 1)
1001 tqc = 2;
1002
1003 for (i = 1; i < tqc; i++)
1004 tpd_ring[i].count = tpd_ring[0].count;
1005
1006 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc +
1007 rfd_ring->count * rqc);
1008 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1009 if (unlikely(!tpd_ring->buffer_info))
1010 goto err_nomem;
1011
1012 for (i = 0; i < tqc; i++) {
1013 tpd_ring[i].adapter = adapter;
1014 tpd_ring[i].num = i;
1015 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1016 count += tpd_ring[i].count;
1017 }
1018
1019 for (i = 0; i < rqc; i++) {
1020 rrd_ring[i].adapter = adapter;
1021 rrd_ring[i].num = i;
1022 rrd_ring[i].count = rfd_ring[0].count;
1023 rfd_ring[i].count = rfd_ring[0].count;
1024 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1025 count += rfd_ring->count;
1026 }
1027
1028 /*
1029 * real ring DMA buffer
1030 * each ring/block may need up to 8 bytes for alignment, hence the
1031 * additional bytes tacked onto the end.
1032 */
1033 ring_header->size =
1034 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc +
1035 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc +
1036 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc +
1037 8 * 4;
1038
1039 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1040 &ring_header->dma, GFP_KERNEL);
1041 if (unlikely(!ring_header->desc)) {
1042 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1043 goto err_nomem;
1044 }
1045 /* init TPD ring */
1046
1047 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1048 offset = tpd_ring[0].dma - ring_header->dma;
1049 for (i = 0; i < tqc; i++) {
1050 tpd_ring[i].dma = ring_header->dma + offset;
1051 tpd_ring[i].desc = (u8 *)ring_header->desc + offset;
1052 tpd_ring[i].size =
1053 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1054 offset += roundup(tpd_ring[i].size, 8);
1055 }
1056 for (i = 0; i < rqc; i++) {
1057 /* init RFD ring */
1058 rfd_ring[i].dma = ring_header->dma + offset;
1059 rfd_ring[i].desc = (u8 *)ring_header->desc + offset;
1060 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1061 rfd_ring[i].count;
1062 offset += roundup(rfd_ring[i].size, 8);
1063
1064 /* init RRD ring */
1065 rrd_ring[i].dma = ring_header->dma + offset;
1066 rrd_ring[i].desc = (u8 *)ring_header->desc + offset;
1067 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1068 rrd_ring[i].count;
1069 offset += roundup(rrd_ring[i].size, 8);
1070 }
1071
1072 return 0;
1073
1074 err_nomem:
1075 kfree(tpd_ring->buffer_info);
1076 return -ENOMEM;
1077 }
1078
atl1c_configure_des_ring(struct atl1c_adapter * adapter)1079 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1080 {
1081 struct atl1c_hw *hw = &adapter->hw;
1082 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1083 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1084 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1085 int i;
1086 int tx_queue_count = adapter->tx_queue_count;
1087
1088 if (tx_queue_count == 1)
1089 tx_queue_count = 2;
1090
1091 /* TPD */
1092 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1093 (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1094 /* just enable normal priority TX queue */
1095 for (i = 0; i < tx_queue_count; i++) {
1096 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo,
1097 (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1098 }
1099 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1100 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1101
1102
1103 /* RFD */
1104 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1105 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1106 for (i = 0; i < adapter->rx_queue_count; i++) {
1107 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo,
1108 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1109 }
1110
1111 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1112 rfd_ring->count & RFD_RING_SIZE_MASK);
1113 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1114 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1115
1116 /* RRD */
1117 for (i = 0; i < adapter->rx_queue_count; i++) {
1118 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo,
1119 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1120 }
1121 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1122 (rrd_ring->count & RRD_RING_SIZE_MASK));
1123
1124 if (hw->nic_type == athr_l2c_b) {
1125 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1126 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1127 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1128 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1129 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1130 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1131 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1132 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1133 }
1134 /* Load all of base address above */
1135 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1136 }
1137
atl1c_configure_tx(struct atl1c_adapter * adapter)1138 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1139 {
1140 struct atl1c_hw *hw = &adapter->hw;
1141 int max_pay_load;
1142 u16 tx_offload_thresh;
1143 u32 txq_ctrl_data;
1144
1145 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1146 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1147 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1148 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1149 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1150 /*
1151 * if BIOS had changed the dam-read-max-length to an invalid value,
1152 * restore it to default value
1153 */
1154 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1155 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1156 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1157 }
1158 txq_ctrl_data =
1159 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1160 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1161
1162 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1163 }
1164
atl1c_configure_rx(struct atl1c_adapter * adapter)1165 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1166 {
1167 struct atl1c_hw *hw = &adapter->hw;
1168 u32 rxq_ctrl_data;
1169
1170 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1171 RXQ_RFD_BURST_NUM_SHIFT;
1172
1173 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1174 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1175
1176 /* aspm for gigabit */
1177 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1178 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1179 ASPM_THRUPUT_LIMIT_100M);
1180
1181 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1182 }
1183
atl1c_configure_dma(struct atl1c_adapter * adapter)1184 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1185 {
1186 struct atl1c_hw *hw = &adapter->hw;
1187 u32 dma_ctrl_data;
1188
1189 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1190 DMA_CTRL_RREQ_PRI_DATA |
1191 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1192 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1193 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1194
1195 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1196 }
1197
1198 /*
1199 * Stop the mac, transmit and receive units
1200 * hw - Struct containing variables accessed by shared code
1201 * return : 0 or idle status (if error)
1202 */
atl1c_stop_mac(struct atl1c_hw * hw)1203 static int atl1c_stop_mac(struct atl1c_hw *hw)
1204 {
1205 u32 data;
1206
1207 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1208 data &= ~RXQ_CTRL_EN;
1209 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1210
1211 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1212 data &= ~TXQ_CTRL_EN;
1213 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1214
1215 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1216
1217 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1218 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1219 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1220
1221 return (int)atl1c_wait_until_idle(hw,
1222 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1223 }
1224
atl1c_start_mac(struct atl1c_adapter * adapter)1225 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1226 {
1227 struct atl1c_hw *hw = &adapter->hw;
1228 u32 mac, txq, rxq;
1229
1230 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX;
1231 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1232 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1233
1234 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1235 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1236 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1237
1238 txq |= TXQ_CTRL_EN;
1239 rxq |= RXQ_CTRL_EN;
1240 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1241 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1242 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1243 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1244 MAC_CTRL_HASH_ALG_CRC32;
1245 if (hw->mac_duplex)
1246 mac |= MAC_CTRL_DUPLX;
1247 else
1248 mac &= ~MAC_CTRL_DUPLX;
1249 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1250 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1251
1252 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1253 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1254 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1255 }
1256
1257 /*
1258 * Reset the transmit and receive units; mask and clear all interrupts.
1259 * hw - Struct containing variables accessed by shared code
1260 * return : 0 or idle status (if error)
1261 */
atl1c_reset_mac(struct atl1c_hw * hw)1262 static int atl1c_reset_mac(struct atl1c_hw *hw)
1263 {
1264 struct atl1c_adapter *adapter = hw->adapter;
1265 struct pci_dev *pdev = adapter->pdev;
1266 u32 ctrl_data = 0;
1267
1268 atl1c_stop_mac(hw);
1269 /*
1270 * Issue Soft Reset to the MAC. This will reset the chip's
1271 * transmit, receive, DMA. It will not effect
1272 * the current PCI configuration. The global reset bit is self-
1273 * clearing, and should clear within a microsecond.
1274 */
1275 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1276 ctrl_data |= MASTER_CTRL_OOB_DIS;
1277 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1278
1279 AT_WRITE_FLUSH(hw);
1280 msleep(10);
1281 /* Wait at least 10ms for All module to be Idle */
1282
1283 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1284 dev_err(&pdev->dev,
1285 "MAC state machine can't be idle since"
1286 " disabled for 10ms second\n");
1287 return -1;
1288 }
1289 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1290
1291 /* driver control speed/duplex */
1292 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1293 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1294
1295 /* clk switch setting */
1296 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1297 switch (hw->nic_type) {
1298 case athr_l2c_b:
1299 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1300 SERDES_MAC_CLK_SLOWDOWN);
1301 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1302 break;
1303 case athr_l2c_b2:
1304 case athr_l1d_2:
1305 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1306 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1307 break;
1308 default:
1309 break;
1310 }
1311
1312 return 0;
1313 }
1314
atl1c_disable_l0s_l1(struct atl1c_hw * hw)1315 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1316 {
1317 u16 ctrl_flags = hw->ctrl_flags;
1318
1319 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1320 atl1c_set_aspm(hw, SPEED_0);
1321 hw->ctrl_flags = ctrl_flags;
1322 }
1323
1324 /*
1325 * Set ASPM state.
1326 * Enable/disable L0s/L1 depend on link state.
1327 */
atl1c_set_aspm(struct atl1c_hw * hw,u16 link_speed)1328 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1329 {
1330 u32 pm_ctrl_data;
1331 u32 link_l1_timer;
1332
1333 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1334 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1335 PM_CTRL_ASPM_L0S_EN |
1336 PM_CTRL_MAC_ASPM_CHK);
1337 /* L1 timer */
1338 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1339 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1340 link_l1_timer =
1341 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1342 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1343 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1344 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1345 } else {
1346 link_l1_timer = hw->nic_type == athr_l2c_b ?
1347 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1348 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1349 link_l1_timer = 1;
1350 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1351 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1352 }
1353
1354 /* L0S/L1 enable */
1355 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1356 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1357 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1358 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1359
1360 /* l2cb & l1d & l2cb2 & l1d2 */
1361 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1362 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1363 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1364 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1365 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1366 PM_CTRL_SERDES_PD_EX_L1 |
1367 PM_CTRL_CLK_SWH_L1;
1368 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1369 PM_CTRL_SERDES_PLL_L1_EN |
1370 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1371 PM_CTRL_SA_DLY_EN |
1372 PM_CTRL_HOTRST);
1373 /* disable l0s if link down or l2cb */
1374 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1375 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1376 } else { /* l1c */
1377 pm_ctrl_data =
1378 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1379 if (link_speed != SPEED_0) {
1380 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1381 PM_CTRL_SERDES_PLL_L1_EN |
1382 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1383 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1384 PM_CTRL_CLK_SWH_L1 |
1385 PM_CTRL_ASPM_L0S_EN |
1386 PM_CTRL_ASPM_L1_EN);
1387 } else { /* link down */
1388 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1389 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1390 PM_CTRL_SERDES_PLL_L1_EN |
1391 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1392 PM_CTRL_ASPM_L0S_EN);
1393 }
1394 }
1395 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1396
1397 return;
1398 }
1399
1400 /**
1401 * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset
1402 * @adapter: board private structure
1403 *
1404 * Configure the Tx /Rx unit of the MAC after a reset.
1405 */
atl1c_configure_mac(struct atl1c_adapter * adapter)1406 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1407 {
1408 struct atl1c_hw *hw = &adapter->hw;
1409 u32 master_ctrl_data = 0;
1410 u32 intr_modrt_data;
1411 u32 data;
1412
1413 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1414 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1415 MASTER_CTRL_RX_ITIMER_EN |
1416 MASTER_CTRL_INT_RDCLR);
1417 /* clear interrupt status */
1418 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1419 /* Clear any WOL status */
1420 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1421 /* set Interrupt Clear Timer
1422 * HW will enable self to assert interrupt event to system after
1423 * waiting x-time for software to notify it accept interrupt.
1424 */
1425
1426 data = CLK_GATING_EN_ALL;
1427 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1428 if (hw->nic_type == athr_l2c_b)
1429 data &= ~CLK_GATING_RXMAC_EN;
1430 } else
1431 data = 0;
1432 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1433
1434 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1435 hw->ict & INT_RETRIG_TIMER_MASK);
1436
1437 atl1c_configure_des_ring(adapter);
1438
1439 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1440 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1441 IRQ_MODRT_TX_TIMER_SHIFT;
1442 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1443 IRQ_MODRT_RX_TIMER_SHIFT;
1444 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1445 master_ctrl_data |=
1446 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1447 }
1448
1449 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1450 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1451
1452 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1453 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1454
1455 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1456 hw->smb_timer & SMB_STAT_TIMER_MASK);
1457
1458 /* set MTU */
1459 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1460 VLAN_HLEN + ETH_FCS_LEN);
1461
1462 atl1c_configure_tx(adapter);
1463 atl1c_configure_rx(adapter);
1464 atl1c_configure_dma(adapter);
1465
1466 return 0;
1467 }
1468
atl1c_configure(struct atl1c_adapter * adapter)1469 static int atl1c_configure(struct atl1c_adapter *adapter)
1470 {
1471 struct net_device *netdev = adapter->netdev;
1472 int num;
1473 int i;
1474
1475 if (adapter->hw.nic_type == athr_mt) {
1476 u32 mode;
1477
1478 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode);
1479 if (adapter->rx_queue_count == 4)
1480 mode |= MT_MODE_4Q;
1481 else
1482 mode &= ~MT_MODE_4Q;
1483 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode);
1484 }
1485
1486 atl1c_init_ring_ptrs(adapter);
1487 atl1c_set_multi(netdev);
1488 atl1c_restore_vlan(adapter);
1489
1490 for (i = 0; i < adapter->rx_queue_count; ++i) {
1491 num = atl1c_alloc_rx_buffer(adapter, i, false);
1492 if (unlikely(num == 0))
1493 return -ENOMEM;
1494 }
1495
1496 if (atl1c_configure_mac(adapter))
1497 return -EIO;
1498
1499 return 0;
1500 }
1501
atl1c_update_hw_stats(struct atl1c_adapter * adapter)1502 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1503 {
1504 u16 hw_reg_addr = 0;
1505 unsigned long *stats_item = NULL;
1506 u32 data;
1507
1508 /* update rx status */
1509 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1510 stats_item = &adapter->hw_stats.rx_ok;
1511 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1512 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1513 *stats_item += data;
1514 stats_item++;
1515 hw_reg_addr += 4;
1516 }
1517 /* update tx status */
1518 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1519 stats_item = &adapter->hw_stats.tx_ok;
1520 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1521 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1522 *stats_item += data;
1523 stats_item++;
1524 hw_reg_addr += 4;
1525 }
1526 }
1527
1528 /**
1529 * atl1c_get_stats - Get System Network Statistics
1530 * @netdev: network interface device structure
1531 *
1532 * Returns the address of the device statistics structure.
1533 * The statistics are actually updated from the timer callback.
1534 */
atl1c_get_stats(struct net_device * netdev)1535 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1536 {
1537 struct atl1c_adapter *adapter = netdev_priv(netdev);
1538 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1539 struct net_device_stats *net_stats = &netdev->stats;
1540
1541 atl1c_update_hw_stats(adapter);
1542 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1543 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1544 net_stats->multicast = hw_stats->rx_mcast;
1545 net_stats->collisions = hw_stats->tx_1_col +
1546 hw_stats->tx_2_col +
1547 hw_stats->tx_late_col +
1548 hw_stats->tx_abort_col;
1549
1550 net_stats->rx_errors = hw_stats->rx_frag +
1551 hw_stats->rx_fcs_err +
1552 hw_stats->rx_len_err +
1553 hw_stats->rx_sz_ov +
1554 hw_stats->rx_rrd_ov +
1555 hw_stats->rx_align_err +
1556 hw_stats->rx_rxf_ov;
1557
1558 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1559 net_stats->rx_length_errors = hw_stats->rx_len_err;
1560 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1561 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1562 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1563
1564 net_stats->tx_errors = hw_stats->tx_late_col +
1565 hw_stats->tx_abort_col +
1566 hw_stats->tx_underrun +
1567 hw_stats->tx_trunc;
1568
1569 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1570 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1571 net_stats->tx_window_errors = hw_stats->tx_late_col;
1572
1573 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1574 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1575
1576 return net_stats;
1577 }
1578
atl1c_clear_phy_int(struct atl1c_adapter * adapter)1579 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1580 {
1581 u16 phy_data;
1582
1583 spin_lock(&adapter->mdio_lock);
1584 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1585 spin_unlock(&adapter->mdio_lock);
1586 }
1587
atl1c_clean_tx(struct napi_struct * napi,int budget)1588 static int atl1c_clean_tx(struct napi_struct *napi, int budget)
1589 {
1590 struct atl1c_tpd_ring *tpd_ring =
1591 container_of(napi, struct atl1c_tpd_ring, napi);
1592 struct atl1c_adapter *adapter = tpd_ring->adapter;
1593 struct netdev_queue *txq =
1594 netdev_get_tx_queue(napi->dev, tpd_ring->num);
1595 struct atl1c_buffer *buffer_info;
1596 struct pci_dev *pdev = adapter->pdev;
1597 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1598 u16 hw_next_to_clean;
1599 unsigned int total_bytes = 0, total_packets = 0;
1600 unsigned long flags;
1601
1602 AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons,
1603 &hw_next_to_clean);
1604
1605 while (next_to_clean != hw_next_to_clean) {
1606 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1607 if (buffer_info->skb) {
1608 total_bytes += buffer_info->skb->len;
1609 total_packets++;
1610 }
1611 atl1c_clean_buffer(pdev, buffer_info, budget);
1612 if (++next_to_clean == tpd_ring->count)
1613 next_to_clean = 0;
1614 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1615 }
1616
1617 netdev_tx_completed_queue(txq, total_packets, total_bytes);
1618
1619 if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev))
1620 netif_tx_wake_queue(txq);
1621
1622 if (total_packets < budget) {
1623 napi_complete_done(napi, total_packets);
1624 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1625 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr;
1626 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1627 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1628 return total_packets;
1629 }
1630 return budget;
1631 }
1632
atl1c_intr_rx_tx(struct atl1c_adapter * adapter,u32 status)1633 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status)
1634 {
1635 struct atl1c_hw *hw = &adapter->hw;
1636 u32 intr_mask;
1637 int i;
1638
1639 spin_lock(&hw->intr_mask_lock);
1640 intr_mask = hw->intr_mask;
1641 for (i = 0; i < adapter->rx_queue_count; ++i) {
1642 if (!(status & atl1c_qregs[i].rx_isr))
1643 continue;
1644 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) {
1645 intr_mask &= ~atl1c_qregs[i].rx_isr;
1646 __napi_schedule(&adapter->rrd_ring[i].napi);
1647 }
1648 }
1649 for (i = 0; i < adapter->tx_queue_count; ++i) {
1650 if (!(status & atl1c_qregs[i].tx_isr))
1651 continue;
1652 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) {
1653 intr_mask &= ~atl1c_qregs[i].tx_isr;
1654 __napi_schedule(&adapter->tpd_ring[i].napi);
1655 }
1656 }
1657
1658 if (hw->intr_mask != intr_mask) {
1659 hw->intr_mask = intr_mask;
1660 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1661 }
1662 spin_unlock(&hw->intr_mask_lock);
1663 }
1664
1665 /**
1666 * atl1c_intr - Interrupt Handler
1667 * @irq: interrupt number
1668 * @data: pointer to a network interface device structure
1669 */
atl1c_intr(int irq,void * data)1670 static irqreturn_t atl1c_intr(int irq, void *data)
1671 {
1672 struct net_device *netdev = data;
1673 struct atl1c_adapter *adapter = netdev_priv(netdev);
1674 struct pci_dev *pdev = adapter->pdev;
1675 struct atl1c_hw *hw = &adapter->hw;
1676 int max_ints = AT_MAX_INT_WORK;
1677 int handled = IRQ_NONE;
1678 u32 status;
1679 u32 reg_data;
1680
1681 do {
1682 AT_READ_REG(hw, REG_ISR, ®_data);
1683 status = reg_data & hw->intr_mask;
1684
1685 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1686 if (max_ints != AT_MAX_INT_WORK)
1687 handled = IRQ_HANDLED;
1688 break;
1689 }
1690 /* link event */
1691 if (status & ISR_GPHY)
1692 atl1c_clear_phy_int(adapter);
1693 /* Ack ISR */
1694 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1695 if (status & (ISR_RX_PKT | ISR_TX_PKT))
1696 atl1c_intr_rx_tx(adapter, status);
1697
1698 handled = IRQ_HANDLED;
1699 /* check if PCIE PHY Link down */
1700 if (status & ISR_ERROR) {
1701 if (netif_msg_hw(adapter))
1702 dev_err(&pdev->dev,
1703 "atl1c hardware error (status = 0x%x)\n",
1704 status & ISR_ERROR);
1705 /* reset MAC */
1706 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1707 schedule_work(&adapter->common_task);
1708 return IRQ_HANDLED;
1709 }
1710
1711 if (status & ISR_OVER)
1712 if (netif_msg_intr(adapter))
1713 dev_warn(&pdev->dev,
1714 "TX/RX overflow (status = 0x%x)\n",
1715 status & ISR_OVER);
1716
1717 /* link event */
1718 if (status & (ISR_GPHY | ISR_MANUAL)) {
1719 netdev->stats.tx_carrier_errors++;
1720 atl1c_link_chg_event(adapter);
1721 break;
1722 }
1723
1724 } while (--max_ints > 0);
1725 /* re-enable Interrupt*/
1726 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1727 return handled;
1728 }
1729
atl1c_rx_checksum(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_recv_ret_status * prrs)1730 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1731 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1732 {
1733 if (adapter->hw.nic_type == athr_mt) {
1734 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP)
1735 skb->ip_summed = CHECKSUM_UNNECESSARY;
1736 return;
1737 }
1738 /*
1739 * The pid field in RRS in not correct sometimes, so we
1740 * cannot figure out if the packet is fragmented or not,
1741 * so we tell the KERNEL CHECKSUM_NONE
1742 */
1743 skb_checksum_none_assert(skb);
1744 }
1745
atl1c_alloc_rx_buffer(struct atl1c_adapter * adapter,u32 queue,bool napi_mode)1746 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
1747 bool napi_mode)
1748 {
1749 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
1750 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
1751 struct pci_dev *pdev = adapter->pdev;
1752 struct atl1c_buffer *buffer_info, *next_info;
1753 struct sk_buff *skb;
1754 void *vir_addr = NULL;
1755 u16 num_alloc = 0;
1756 u16 rfd_next_to_use, next_next;
1757 struct atl1c_rx_free_desc *rfd_desc;
1758 dma_addr_t mapping;
1759
1760 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1761 if (++next_next == rfd_ring->count)
1762 next_next = 0;
1763 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1764 next_info = &rfd_ring->buffer_info[next_next];
1765
1766 while (next_info->flags & ATL1C_BUFFER_FREE) {
1767 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1768
1769 /* When DMA RX address is set to something like
1770 * 0x....fc0, it will be very likely to cause DMA
1771 * RFD overflow issue.
1772 *
1773 * To work around it, we apply rx skb with 64 bytes
1774 * longer space, and offset the address whenever
1775 * 0x....fc0 is detected.
1776 */
1777 if (likely(napi_mode))
1778 skb = napi_alloc_skb(&rrd_ring->napi, adapter->rx_buffer_len + 64);
1779 else
1780 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len + 64);
1781 if (unlikely(!skb)) {
1782 if (netif_msg_rx_err(adapter))
1783 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1784 break;
1785 }
1786
1787 if (((unsigned long)skb->data & 0xfff) == 0xfc0)
1788 skb_reserve(skb, 64);
1789
1790 /*
1791 * Make buffer alignment 2 beyond a 16 byte boundary
1792 * this will result in a 16 byte aligned IP header after
1793 * the 14 byte MAC header is removed
1794 */
1795 vir_addr = skb->data;
1796 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1797 buffer_info->skb = skb;
1798 buffer_info->length = adapter->rx_buffer_len;
1799 mapping = dma_map_single(&pdev->dev, vir_addr,
1800 buffer_info->length, DMA_FROM_DEVICE);
1801 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1802 dev_kfree_skb(skb);
1803 buffer_info->skb = NULL;
1804 buffer_info->length = 0;
1805 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1806 netif_warn(adapter, rx_err, adapter->netdev, "RX dma_map_single failed");
1807 break;
1808 }
1809 buffer_info->dma = mapping;
1810 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1811 ATL1C_PCIMAP_FROMDEVICE);
1812 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1813 rfd_next_to_use = next_next;
1814 if (++next_next == rfd_ring->count)
1815 next_next = 0;
1816 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1817 next_info = &rfd_ring->buffer_info[next_next];
1818 num_alloc++;
1819 }
1820
1821 if (num_alloc) {
1822 /* TODO: update mailbox here */
1823 wmb();
1824 rfd_ring->next_to_use = rfd_next_to_use;
1825 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod,
1826 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1827 }
1828
1829 return num_alloc;
1830 }
1831
atl1c_clean_rrd(struct atl1c_rrd_ring * rrd_ring,struct atl1c_recv_ret_status * rrs,u16 num)1832 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1833 struct atl1c_recv_ret_status *rrs, u16 num)
1834 {
1835 u16 i;
1836 /* the relationship between rrd and rfd is one map one */
1837 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1838 rrd_ring->next_to_clean)) {
1839 rrs->word3 &= ~RRS_RXD_UPDATED;
1840 if (++rrd_ring->next_to_clean == rrd_ring->count)
1841 rrd_ring->next_to_clean = 0;
1842 }
1843 }
1844
atl1c_clean_rfd(struct atl1c_rfd_ring * rfd_ring,struct atl1c_recv_ret_status * rrs,u16 num)1845 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1846 struct atl1c_recv_ret_status *rrs, u16 num)
1847 {
1848 u16 i;
1849 u16 rfd_index;
1850 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1851
1852 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1853 RRS_RX_RFD_INDEX_MASK;
1854 for (i = 0; i < num; i++) {
1855 buffer_info[rfd_index].skb = NULL;
1856 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1857 ATL1C_BUFFER_FREE);
1858 if (++rfd_index == rfd_ring->count)
1859 rfd_index = 0;
1860 }
1861 rfd_ring->next_to_clean = rfd_index;
1862 }
1863
1864 /**
1865 * atl1c_clean_rx - NAPI Rx polling callback
1866 * @napi: napi info
1867 * @budget: limit of packets to clean
1868 */
atl1c_clean_rx(struct napi_struct * napi,int budget)1869 static int atl1c_clean_rx(struct napi_struct *napi, int budget)
1870 {
1871 struct atl1c_rrd_ring *rrd_ring =
1872 container_of(napi, struct atl1c_rrd_ring, napi);
1873 struct atl1c_adapter *adapter = rrd_ring->adapter;
1874 u16 rfd_num, rfd_index;
1875 u16 length;
1876 struct pci_dev *pdev = adapter->pdev;
1877 struct net_device *netdev = adapter->netdev;
1878 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num];
1879 struct sk_buff *skb;
1880 struct atl1c_recv_ret_status *rrs;
1881 struct atl1c_buffer *buffer_info;
1882 int work_done = 0;
1883 unsigned long flags;
1884
1885 /* Keep link state information with original netdev */
1886 if (!netif_carrier_ok(adapter->netdev))
1887 goto quit_polling;
1888
1889 while (1) {
1890 if (work_done >= budget)
1891 break;
1892 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1893 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1894 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1895 RRS_RX_RFD_CNT_MASK;
1896 if (unlikely(rfd_num != 1))
1897 /* TODO support mul rfd*/
1898 if (netif_msg_rx_err(adapter))
1899 dev_warn(&pdev->dev,
1900 "Multi rfd not support yet!\n");
1901 goto rrs_checked;
1902 } else {
1903 break;
1904 }
1905 rrs_checked:
1906 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1907 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1908 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1909 if (netif_msg_rx_err(adapter))
1910 dev_warn(&pdev->dev,
1911 "wrong packet! rrs word3 is %x\n",
1912 rrs->word3);
1913 continue;
1914 }
1915
1916 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1917 RRS_PKT_SIZE_MASK);
1918 /* Good Receive */
1919 if (likely(rfd_num == 1)) {
1920 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1921 RRS_RX_RFD_INDEX_MASK;
1922 buffer_info = &rfd_ring->buffer_info[rfd_index];
1923 dma_unmap_single(&pdev->dev, buffer_info->dma,
1924 buffer_info->length, DMA_FROM_DEVICE);
1925 skb = buffer_info->skb;
1926 } else {
1927 /* TODO */
1928 if (netif_msg_rx_err(adapter))
1929 dev_warn(&pdev->dev,
1930 "Multi rfd not support yet!\n");
1931 break;
1932 }
1933 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1934 skb_put(skb, length - ETH_FCS_LEN);
1935 skb->protocol = eth_type_trans(skb, netdev);
1936 atl1c_rx_checksum(adapter, skb, rrs);
1937 if (rrs->word3 & RRS_VLAN_INS) {
1938 u16 vlan;
1939
1940 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1941 vlan = le16_to_cpu(vlan);
1942 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1943 }
1944 napi_gro_receive(napi, skb);
1945
1946 work_done++;
1947 }
1948 if (work_done)
1949 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true);
1950
1951 if (work_done < budget) {
1952 quit_polling:
1953 napi_complete_done(napi, work_done);
1954 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1955 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr;
1956 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1957 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1958 }
1959 return work_done;
1960 }
1961
1962 #ifdef CONFIG_NET_POLL_CONTROLLER
1963
1964 /*
1965 * Polling 'interrupt' - used by things like netconsole to send skbs
1966 * without having to re-enable interrupts. It's not called while
1967 * the interrupt routine is executing.
1968 */
atl1c_netpoll(struct net_device * netdev)1969 static void atl1c_netpoll(struct net_device *netdev)
1970 {
1971 struct atl1c_adapter *adapter = netdev_priv(netdev);
1972
1973 disable_irq(adapter->pdev->irq);
1974 atl1c_intr(adapter->pdev->irq, netdev);
1975 enable_irq(adapter->pdev->irq);
1976 }
1977 #endif
1978
atl1c_tpd_avail(struct atl1c_adapter * adapter,u32 queue)1979 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue)
1980 {
1981 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
1982 u16 next_to_use = 0;
1983 u16 next_to_clean = 0;
1984
1985 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1986 next_to_use = tpd_ring->next_to_use;
1987
1988 return (u16)(next_to_clean > next_to_use) ?
1989 (next_to_clean - next_to_use - 1) :
1990 (tpd_ring->count + next_to_clean - next_to_use - 1);
1991 }
1992
1993 /*
1994 * get next usable tpd
1995 * Note: should call atl1c_tdp_avail to make sure
1996 * there is enough tpd to use
1997 */
atl1c_get_tpd(struct atl1c_adapter * adapter,u32 queue)1998 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1999 u32 queue)
2000 {
2001 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2002 struct atl1c_tpd_desc *tpd_desc;
2003 u16 next_to_use = 0;
2004
2005 next_to_use = tpd_ring->next_to_use;
2006 if (++tpd_ring->next_to_use == tpd_ring->count)
2007 tpd_ring->next_to_use = 0;
2008 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
2009 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
2010 return tpd_desc;
2011 }
2012
2013 static struct atl1c_buffer *
atl1c_get_tx_buffer(struct atl1c_adapter * adapter,struct atl1c_tpd_desc * tpd)2014 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
2015 {
2016 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
2017
2018 return &tpd_ring->buffer_info[tpd -
2019 (struct atl1c_tpd_desc *)tpd_ring->desc];
2020 }
2021
2022 /* Calculate the transmit packet descript needed*/
atl1c_cal_tpd_req(const struct sk_buff * skb)2023 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2024 {
2025 u16 tpd_req;
2026 u16 proto_hdr_len = 0;
2027
2028 tpd_req = skb_shinfo(skb)->nr_frags + 1;
2029
2030 if (skb_is_gso(skb)) {
2031 proto_hdr_len = skb_tcp_all_headers(skb);
2032 if (proto_hdr_len < skb_headlen(skb))
2033 tpd_req++;
2034 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2035 tpd_req++;
2036 }
2037 return tpd_req;
2038 }
2039
atl1c_tso_csum(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc ** tpd,u32 queue)2040 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2041 struct sk_buff *skb,
2042 struct atl1c_tpd_desc **tpd,
2043 u32 queue)
2044 {
2045 struct pci_dev *pdev = adapter->pdev;
2046 unsigned short offload_type;
2047 u8 hdr_len;
2048 u32 real_len;
2049
2050 if (skb_is_gso(skb)) {
2051 int err;
2052
2053 err = skb_cow_head(skb, 0);
2054 if (err < 0)
2055 return err;
2056
2057 offload_type = skb_shinfo(skb)->gso_type;
2058
2059 if (offload_type & SKB_GSO_TCPV4) {
2060 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2061 + ntohs(ip_hdr(skb)->tot_len));
2062
2063 if (real_len < skb->len) {
2064 err = pskb_trim(skb, real_len);
2065 if (err)
2066 return err;
2067 }
2068
2069 hdr_len = skb_tcp_all_headers(skb);
2070 if (unlikely(skb->len == hdr_len)) {
2071 /* only xsum need */
2072 if (netif_msg_tx_queued(adapter))
2073 dev_warn(&pdev->dev,
2074 "IPV4 tso with zero data??\n");
2075 goto check_sum;
2076 } else {
2077 ip_hdr(skb)->check = 0;
2078 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2079 ip_hdr(skb)->saddr,
2080 ip_hdr(skb)->daddr,
2081 0, IPPROTO_TCP, 0);
2082 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2083 }
2084 }
2085
2086 if (offload_type & SKB_GSO_TCPV6) {
2087 struct atl1c_tpd_ext_desc *etpd =
2088 *(struct atl1c_tpd_ext_desc **)(tpd);
2089
2090 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2091 *tpd = atl1c_get_tpd(adapter, queue);
2092 ipv6_hdr(skb)->payload_len = 0;
2093 /* check payload == 0 byte ? */
2094 hdr_len = skb_tcp_all_headers(skb);
2095 if (unlikely(skb->len == hdr_len)) {
2096 /* only xsum need */
2097 if (netif_msg_tx_queued(adapter))
2098 dev_warn(&pdev->dev,
2099 "IPV6 tso with zero data??\n");
2100 goto check_sum;
2101 } else
2102 tcp_v6_gso_csum_prep(skb);
2103
2104 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2105 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2106 etpd->pkt_len = cpu_to_le32(skb->len);
2107 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2108 }
2109
2110 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2111 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2112 TPD_TCPHDR_OFFSET_SHIFT;
2113 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2114 TPD_MSS_SHIFT;
2115 return 0;
2116 }
2117
2118 check_sum:
2119 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2120 u8 css, cso;
2121 cso = skb_checksum_start_offset(skb);
2122
2123 if (unlikely(cso & 0x1)) {
2124 if (netif_msg_tx_err(adapter))
2125 dev_err(&adapter->pdev->dev,
2126 "payload offset should not an event number\n");
2127 return -1;
2128 } else {
2129 css = cso + skb->csum_offset;
2130
2131 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2132 TPD_PLOADOFFSET_SHIFT;
2133 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2134 TPD_CCSUM_OFFSET_SHIFT;
2135 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2136 }
2137 }
2138 return 0;
2139 }
2140
atl1c_tx_rollback(struct atl1c_adapter * adpt,struct atl1c_tpd_desc * first_tpd,u32 queue)2141 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2142 struct atl1c_tpd_desc *first_tpd,
2143 u32 queue)
2144 {
2145 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue];
2146 struct atl1c_buffer *buffer_info;
2147 struct atl1c_tpd_desc *tpd;
2148 u16 first_index, index;
2149
2150 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2151 index = first_index;
2152 while (index != tpd_ring->next_to_use) {
2153 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2154 buffer_info = &tpd_ring->buffer_info[index];
2155 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2156 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2157 if (++index == tpd_ring->count)
2158 index = 0;
2159 }
2160 tpd_ring->next_to_use = first_index;
2161 }
2162
atl1c_tx_map(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc * tpd,u32 queue)2163 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2164 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2165 u32 queue)
2166 {
2167 struct atl1c_tpd_desc *use_tpd = NULL;
2168 struct atl1c_buffer *buffer_info = NULL;
2169 u16 buf_len = skb_headlen(skb);
2170 u16 map_len = 0;
2171 u16 mapped_len = 0;
2172 u16 hdr_len = 0;
2173 u16 nr_frags;
2174 u16 f;
2175 int tso;
2176
2177 nr_frags = skb_shinfo(skb)->nr_frags;
2178 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2179 if (tso) {
2180 /* TSO */
2181 hdr_len = skb_tcp_all_headers(skb);
2182 map_len = hdr_len;
2183 use_tpd = tpd;
2184
2185 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2186 buffer_info->length = map_len;
2187 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2188 skb->data, hdr_len,
2189 DMA_TO_DEVICE);
2190 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2191 goto err_dma;
2192 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2193 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2194 ATL1C_PCIMAP_TODEVICE);
2195 mapped_len += map_len;
2196 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2197 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2198 }
2199
2200 if (mapped_len < buf_len) {
2201 /* mapped_len == 0, means we should use the first tpd,
2202 which is given by caller */
2203 if (mapped_len == 0)
2204 use_tpd = tpd;
2205 else {
2206 use_tpd = atl1c_get_tpd(adapter, queue);
2207 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2208 }
2209 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2210 buffer_info->length = buf_len - mapped_len;
2211 buffer_info->dma =
2212 dma_map_single(&adapter->pdev->dev,
2213 skb->data + mapped_len,
2214 buffer_info->length, DMA_TO_DEVICE);
2215 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2216 goto err_dma;
2217
2218 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2219 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2220 ATL1C_PCIMAP_TODEVICE);
2221 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2222 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2223 }
2224
2225 for (f = 0; f < nr_frags; f++) {
2226 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2227
2228 use_tpd = atl1c_get_tpd(adapter, queue);
2229 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2230
2231 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2232 buffer_info->length = skb_frag_size(frag);
2233 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2234 frag, 0,
2235 buffer_info->length,
2236 DMA_TO_DEVICE);
2237 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2238 goto err_dma;
2239
2240 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2241 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2242 ATL1C_PCIMAP_TODEVICE);
2243 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2244 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2245 }
2246
2247 /* The last tpd */
2248 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2249 /* The last buffer info contain the skb address,
2250 so it will be free after unmap */
2251 buffer_info->skb = skb;
2252
2253 return 0;
2254
2255 err_dma:
2256 buffer_info->dma = 0;
2257 buffer_info->length = 0;
2258 return -1;
2259 }
2260
atl1c_tx_queue(struct atl1c_adapter * adapter,u32 queue)2261 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue)
2262 {
2263 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2264
2265 AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod,
2266 tpd_ring->next_to_use);
2267 }
2268
atl1c_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2269 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2270 struct net_device *netdev)
2271 {
2272 struct atl1c_adapter *adapter = netdev_priv(netdev);
2273 u32 queue = skb_get_queue_mapping(skb);
2274 struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue);
2275 struct atl1c_tpd_desc *tpd;
2276 u16 tpd_req;
2277
2278 if (test_bit(__AT_DOWN, &adapter->flags)) {
2279 dev_kfree_skb_any(skb);
2280 return NETDEV_TX_OK;
2281 }
2282
2283 tpd_req = atl1c_cal_tpd_req(skb);
2284
2285 if (atl1c_tpd_avail(adapter, queue) < tpd_req) {
2286 /* no enough descriptor, just stop queue */
2287 atl1c_tx_queue(adapter, queue);
2288 netif_tx_stop_queue(txq);
2289 return NETDEV_TX_BUSY;
2290 }
2291
2292 tpd = atl1c_get_tpd(adapter, queue);
2293
2294 /* do TSO and check sum */
2295 if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) {
2296 atl1c_tx_queue(adapter, queue);
2297 dev_kfree_skb_any(skb);
2298 return NETDEV_TX_OK;
2299 }
2300
2301 if (unlikely(skb_vlan_tag_present(skb))) {
2302 u16 vlan = skb_vlan_tag_get(skb);
2303 __le16 tag;
2304
2305 vlan = cpu_to_le16(vlan);
2306 AT_VLAN_TO_TAG(vlan, tag);
2307 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2308 tpd->vlan_tag = tag;
2309 }
2310
2311 if (skb_network_offset(skb) != ETH_HLEN)
2312 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2313
2314 if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) {
2315 netif_info(adapter, tx_done, adapter->netdev,
2316 "tx-skb dropped due to dma error\n");
2317 /* roll back tpd/buffer */
2318 atl1c_tx_rollback(adapter, tpd, queue);
2319 dev_kfree_skb_any(skb);
2320 } else {
2321 bool more = netdev_xmit_more();
2322
2323 if (__netdev_tx_sent_queue(txq, skb->len, more))
2324 atl1c_tx_queue(adapter, queue);
2325 }
2326
2327 return NETDEV_TX_OK;
2328 }
2329
atl1c_free_irq(struct atl1c_adapter * adapter)2330 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2331 {
2332 struct net_device *netdev = adapter->netdev;
2333
2334 free_irq(adapter->pdev->irq, netdev);
2335
2336 if (adapter->have_msi)
2337 pci_disable_msi(adapter->pdev);
2338 }
2339
atl1c_request_irq(struct atl1c_adapter * adapter)2340 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2341 {
2342 struct pci_dev *pdev = adapter->pdev;
2343 struct net_device *netdev = adapter->netdev;
2344 int flags = 0;
2345 int err = 0;
2346
2347 adapter->have_msi = true;
2348 err = pci_enable_msi(adapter->pdev);
2349 if (err) {
2350 if (netif_msg_ifup(adapter))
2351 dev_err(&pdev->dev,
2352 "Unable to allocate MSI interrupt Error: %d\n",
2353 err);
2354 adapter->have_msi = false;
2355 }
2356
2357 if (!adapter->have_msi)
2358 flags |= IRQF_SHARED;
2359 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2360 netdev->name, netdev);
2361 if (err) {
2362 if (netif_msg_ifup(adapter))
2363 dev_err(&pdev->dev,
2364 "Unable to allocate interrupt Error: %d\n",
2365 err);
2366 if (adapter->have_msi)
2367 pci_disable_msi(adapter->pdev);
2368 return err;
2369 }
2370 if (netif_msg_ifup(adapter))
2371 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2372 return err;
2373 }
2374
2375
atl1c_reset_dma_ring(struct atl1c_adapter * adapter)2376 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2377 {
2378 int i;
2379 /* release tx-pending skbs and reset tx/rx ring index */
2380 for (i = 0; i < adapter->tx_queue_count; ++i)
2381 atl1c_clean_tx_ring(adapter, i);
2382 for (i = 0; i < adapter->rx_queue_count; ++i)
2383 atl1c_clean_rx_ring(adapter, i);
2384 }
2385
atl1c_up(struct atl1c_adapter * adapter)2386 static int atl1c_up(struct atl1c_adapter *adapter)
2387 {
2388 struct net_device *netdev = adapter->netdev;
2389 int err;
2390 int i;
2391
2392 netif_carrier_off(netdev);
2393
2394 err = atl1c_configure(adapter);
2395 if (unlikely(err))
2396 goto err_up;
2397
2398 err = atl1c_request_irq(adapter);
2399 if (unlikely(err))
2400 goto err_up;
2401
2402 atl1c_check_link_status(adapter);
2403 clear_bit(__AT_DOWN, &adapter->flags);
2404 for (i = 0; i < adapter->tx_queue_count; ++i)
2405 napi_enable(&adapter->tpd_ring[i].napi);
2406 for (i = 0; i < adapter->rx_queue_count; ++i)
2407 napi_enable(&adapter->rrd_ring[i].napi);
2408 atl1c_irq_enable(adapter);
2409 netif_start_queue(netdev);
2410 return err;
2411
2412 err_up:
2413 for (i = 0; i < adapter->rx_queue_count; ++i)
2414 atl1c_clean_rx_ring(adapter, i);
2415 return err;
2416 }
2417
atl1c_down(struct atl1c_adapter * adapter)2418 static void atl1c_down(struct atl1c_adapter *adapter)
2419 {
2420 struct net_device *netdev = adapter->netdev;
2421 int i;
2422
2423 atl1c_del_timer(adapter);
2424 adapter->work_event = 0; /* clear all event */
2425 /* signal that we're down so the interrupt handler does not
2426 * reschedule our watchdog timer */
2427 set_bit(__AT_DOWN, &adapter->flags);
2428 netif_carrier_off(netdev);
2429 for (i = 0; i < adapter->tx_queue_count; ++i)
2430 napi_disable(&adapter->tpd_ring[i].napi);
2431 for (i = 0; i < adapter->rx_queue_count; ++i)
2432 napi_disable(&adapter->rrd_ring[i].napi);
2433 atl1c_irq_disable(adapter);
2434 atl1c_free_irq(adapter);
2435 /* disable ASPM if device inactive */
2436 atl1c_disable_l0s_l1(&adapter->hw);
2437 /* reset MAC to disable all RX/TX */
2438 atl1c_reset_mac(&adapter->hw);
2439 msleep(1);
2440
2441 adapter->link_speed = SPEED_0;
2442 adapter->link_duplex = -1;
2443 atl1c_reset_dma_ring(adapter);
2444 }
2445
2446 /**
2447 * atl1c_open - Called when a network interface is made active
2448 * @netdev: network interface device structure
2449 *
2450 * Returns 0 on success, negative value on failure
2451 *
2452 * The open entry point is called when a network interface is made
2453 * active by the system (IFF_UP). At this point all resources needed
2454 * for transmit and receive operations are allocated, the interrupt
2455 * handler is registered with the OS, the watchdog timer is started,
2456 * and the stack is notified that the interface is ready.
2457 */
atl1c_open(struct net_device * netdev)2458 static int atl1c_open(struct net_device *netdev)
2459 {
2460 struct atl1c_adapter *adapter = netdev_priv(netdev);
2461 int err;
2462
2463 /* disallow open during test */
2464 if (test_bit(__AT_TESTING, &adapter->flags))
2465 return -EBUSY;
2466
2467 /* allocate rx/tx dma buffer & descriptors */
2468 err = atl1c_setup_ring_resources(adapter);
2469 if (unlikely(err))
2470 return err;
2471
2472 err = atl1c_up(adapter);
2473 if (unlikely(err))
2474 goto err_up;
2475
2476 return 0;
2477
2478 err_up:
2479 atl1c_free_irq(adapter);
2480 atl1c_free_ring_resources(adapter);
2481 atl1c_reset_mac(&adapter->hw);
2482 return err;
2483 }
2484
2485 /**
2486 * atl1c_close - Disables a network interface
2487 * @netdev: network interface device structure
2488 *
2489 * Returns 0, this is not allowed to fail
2490 *
2491 * The close entry point is called when an interface is de-activated
2492 * by the OS. The hardware is still under the drivers control, but
2493 * needs to be disabled. A global MAC reset is issued to stop the
2494 * hardware, and all transmit and receive resources are freed.
2495 */
atl1c_close(struct net_device * netdev)2496 static int atl1c_close(struct net_device *netdev)
2497 {
2498 struct atl1c_adapter *adapter = netdev_priv(netdev);
2499
2500 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2501 set_bit(__AT_DOWN, &adapter->flags);
2502 cancel_work_sync(&adapter->common_task);
2503 atl1c_down(adapter);
2504 atl1c_free_ring_resources(adapter);
2505 return 0;
2506 }
2507
atl1c_suspend(struct device * dev)2508 static int atl1c_suspend(struct device *dev)
2509 {
2510 struct net_device *netdev = dev_get_drvdata(dev);
2511 struct atl1c_adapter *adapter = netdev_priv(netdev);
2512 struct atl1c_hw *hw = &adapter->hw;
2513 u32 wufc = adapter->wol;
2514
2515 atl1c_disable_l0s_l1(hw);
2516 if (netif_running(netdev)) {
2517 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2518 atl1c_down(adapter);
2519 }
2520 netif_device_detach(netdev);
2521
2522 if (wufc)
2523 if (atl1c_phy_to_ps_link(hw) != 0)
2524 dev_dbg(dev, "phy power saving failed");
2525
2526 atl1c_power_saving(hw, wufc);
2527
2528 return 0;
2529 }
2530
2531 #ifdef CONFIG_PM_SLEEP
atl1c_resume(struct device * dev)2532 static int atl1c_resume(struct device *dev)
2533 {
2534 struct net_device *netdev = dev_get_drvdata(dev);
2535 struct atl1c_adapter *adapter = netdev_priv(netdev);
2536
2537 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2538 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2539
2540 atl1c_phy_reset(&adapter->hw);
2541 atl1c_reset_mac(&adapter->hw);
2542 atl1c_phy_init(&adapter->hw);
2543
2544 netif_device_attach(netdev);
2545 if (netif_running(netdev))
2546 atl1c_up(adapter);
2547
2548 return 0;
2549 }
2550 #endif
2551
atl1c_shutdown(struct pci_dev * pdev)2552 static void atl1c_shutdown(struct pci_dev *pdev)
2553 {
2554 struct net_device *netdev = pci_get_drvdata(pdev);
2555 struct atl1c_adapter *adapter = netdev_priv(netdev);
2556
2557 atl1c_suspend(&pdev->dev);
2558 pci_wake_from_d3(pdev, adapter->wol);
2559 pci_set_power_state(pdev, PCI_D3hot);
2560 }
2561
2562 static const struct net_device_ops atl1c_netdev_ops = {
2563 .ndo_open = atl1c_open,
2564 .ndo_stop = atl1c_close,
2565 .ndo_validate_addr = eth_validate_addr,
2566 .ndo_start_xmit = atl1c_xmit_frame,
2567 .ndo_set_mac_address = atl1c_set_mac_addr,
2568 .ndo_set_rx_mode = atl1c_set_multi,
2569 .ndo_change_mtu = atl1c_change_mtu,
2570 .ndo_fix_features = atl1c_fix_features,
2571 .ndo_set_features = atl1c_set_features,
2572 .ndo_eth_ioctl = atl1c_ioctl,
2573 .ndo_tx_timeout = atl1c_tx_timeout,
2574 .ndo_get_stats = atl1c_get_stats,
2575 #ifdef CONFIG_NET_POLL_CONTROLLER
2576 .ndo_poll_controller = atl1c_netpoll,
2577 #endif
2578 };
2579
atl1c_init_netdev(struct net_device * netdev,struct pci_dev * pdev)2580 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2581 {
2582 SET_NETDEV_DEV(netdev, &pdev->dev);
2583 pci_set_drvdata(pdev, netdev);
2584
2585 netdev->netdev_ops = &atl1c_netdev_ops;
2586 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2587 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2588 atl1c_set_ethtool_ops(netdev);
2589
2590 /* TODO: add when ready */
2591 netdev->hw_features = NETIF_F_SG |
2592 NETIF_F_HW_CSUM |
2593 NETIF_F_HW_VLAN_CTAG_RX |
2594 NETIF_F_TSO |
2595 NETIF_F_TSO6;
2596 netdev->features = netdev->hw_features |
2597 NETIF_F_HW_VLAN_CTAG_TX;
2598 return 0;
2599 }
2600
2601 /**
2602 * atl1c_probe - Device Initialization Routine
2603 * @pdev: PCI device information struct
2604 * @ent: entry in atl1c_pci_tbl
2605 *
2606 * Returns 0 on success, negative on failure
2607 *
2608 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2609 * The OS initialization, configuring of the adapter private structure,
2610 * and a hardware reset occur.
2611 */
atl1c_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2612 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2613 {
2614 struct net_device *netdev;
2615 struct atl1c_adapter *adapter;
2616 static int cards_found;
2617 u8 __iomem *hw_addr;
2618 enum atl1c_nic_type nic_type;
2619 u32 queue_count = 1;
2620 int err = 0;
2621 int i;
2622
2623 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2624 err = pci_enable_device_mem(pdev);
2625 if (err)
2626 return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");
2627
2628 /*
2629 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2630 * shared register for the high 32 bits, so only a single, aligned,
2631 * 4 GB physical address range can be used at a time.
2632 *
2633 * Supporting 64-bit DMA on this hardware is more trouble than it's
2634 * worth. It is far easier to limit to 32-bit DMA than update
2635 * various kernel subsystems to support the mechanics required by a
2636 * fixed-high-32-bit system.
2637 */
2638 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2639 if (err) {
2640 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2641 goto err_dma;
2642 }
2643
2644 err = pci_request_regions(pdev, atl1c_driver_name);
2645 if (err) {
2646 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2647 goto err_pci_reg;
2648 }
2649
2650 pci_set_master(pdev);
2651
2652 hw_addr = pci_ioremap_bar(pdev, 0);
2653 if (!hw_addr) {
2654 err = -EIO;
2655 dev_err(&pdev->dev, "cannot map device registers\n");
2656 goto err_ioremap;
2657 }
2658
2659 nic_type = atl1c_get_mac_type(pdev, hw_addr);
2660 if (nic_type == athr_mt)
2661 queue_count = 4;
2662
2663 netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count);
2664 if (netdev == NULL) {
2665 err = -ENOMEM;
2666 goto err_alloc_etherdev;
2667 }
2668
2669 err = atl1c_init_netdev(netdev, pdev);
2670 if (err) {
2671 dev_err(&pdev->dev, "init netdevice failed\n");
2672 goto err_init_netdev;
2673 }
2674 adapter = netdev_priv(netdev);
2675 adapter->bd_number = cards_found;
2676 adapter->netdev = netdev;
2677 adapter->pdev = pdev;
2678 adapter->hw.adapter = adapter;
2679 adapter->hw.nic_type = nic_type;
2680 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2681 adapter->hw.hw_addr = hw_addr;
2682 adapter->tx_queue_count = queue_count;
2683 adapter->rx_queue_count = queue_count;
2684
2685 /* init mii data */
2686 adapter->mii.dev = netdev;
2687 adapter->mii.mdio_read = atl1c_mdio_read;
2688 adapter->mii.mdio_write = atl1c_mdio_write;
2689 adapter->mii.phy_id_mask = 0x1f;
2690 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2691 dev_set_threaded(netdev, true);
2692 for (i = 0; i < adapter->rx_queue_count; ++i)
2693 netif_napi_add(netdev, &adapter->rrd_ring[i].napi,
2694 atl1c_clean_rx);
2695 for (i = 0; i < adapter->tx_queue_count; ++i)
2696 netif_napi_add_tx(netdev, &adapter->tpd_ring[i].napi,
2697 atl1c_clean_tx);
2698 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2699 /* setup the private structure */
2700 err = atl1c_sw_init(adapter);
2701 if (err) {
2702 dev_err(&pdev->dev, "net device private data init failed\n");
2703 goto err_sw_init;
2704 }
2705 /* set max MTU */
2706 atl1c_set_max_mtu(netdev);
2707
2708 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2709
2710 /* Init GPHY as early as possible due to power saving issue */
2711 atl1c_phy_reset(&adapter->hw);
2712
2713 err = atl1c_reset_mac(&adapter->hw);
2714 if (err) {
2715 err = -EIO;
2716 goto err_reset;
2717 }
2718
2719 /* reset the controller to
2720 * put the device in a known good starting state */
2721 err = atl1c_phy_init(&adapter->hw);
2722 if (err) {
2723 err = -EIO;
2724 goto err_reset;
2725 }
2726 if (atl1c_read_mac_addr(&adapter->hw)) {
2727 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2728 netdev->addr_assign_type = NET_ADDR_RANDOM;
2729 }
2730 eth_hw_addr_set(netdev, adapter->hw.mac_addr);
2731 if (netif_msg_probe(adapter))
2732 dev_dbg(&pdev->dev, "mac address : %pM\n",
2733 adapter->hw.mac_addr);
2734
2735 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2736 INIT_WORK(&adapter->common_task, atl1c_common_task);
2737 adapter->work_event = 0;
2738 err = register_netdev(netdev);
2739 if (err) {
2740 dev_err(&pdev->dev, "register netdevice failed\n");
2741 goto err_register;
2742 }
2743
2744 cards_found++;
2745 return 0;
2746
2747 err_reset:
2748 err_register:
2749 err_sw_init:
2750 err_init_netdev:
2751 free_netdev(netdev);
2752 err_alloc_etherdev:
2753 iounmap(hw_addr);
2754 err_ioremap:
2755 pci_release_regions(pdev);
2756 err_pci_reg:
2757 err_dma:
2758 pci_disable_device(pdev);
2759 return err;
2760 }
2761
2762 /**
2763 * atl1c_remove - Device Removal Routine
2764 * @pdev: PCI device information struct
2765 *
2766 * atl1c_remove is called by the PCI subsystem to alert the driver
2767 * that it should release a PCI device. The could be caused by a
2768 * Hot-Plug event, or because the driver is going to be removed from
2769 * memory.
2770 */
atl1c_remove(struct pci_dev * pdev)2771 static void atl1c_remove(struct pci_dev *pdev)
2772 {
2773 struct net_device *netdev = pci_get_drvdata(pdev);
2774 struct atl1c_adapter *adapter = netdev_priv(netdev);
2775
2776 unregister_netdev(netdev);
2777 /* restore permanent address */
2778 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2779 atl1c_phy_disable(&adapter->hw);
2780
2781 iounmap(adapter->hw.hw_addr);
2782
2783 pci_release_regions(pdev);
2784 pci_disable_device(pdev);
2785 free_netdev(netdev);
2786 }
2787
2788 /**
2789 * atl1c_io_error_detected - called when PCI error is detected
2790 * @pdev: Pointer to PCI device
2791 * @state: The current pci connection state
2792 *
2793 * This function is called after a PCI bus error affecting
2794 * this device has been detected.
2795 */
atl1c_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)2796 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2797 pci_channel_state_t state)
2798 {
2799 struct net_device *netdev = pci_get_drvdata(pdev);
2800 struct atl1c_adapter *adapter = netdev_priv(netdev);
2801
2802 netif_device_detach(netdev);
2803
2804 if (state == pci_channel_io_perm_failure)
2805 return PCI_ERS_RESULT_DISCONNECT;
2806
2807 if (netif_running(netdev))
2808 atl1c_down(adapter);
2809
2810 pci_disable_device(pdev);
2811
2812 /* Request a slot reset. */
2813 return PCI_ERS_RESULT_NEED_RESET;
2814 }
2815
2816 /**
2817 * atl1c_io_slot_reset - called after the pci bus has been reset.
2818 * @pdev: Pointer to PCI device
2819 *
2820 * Restart the card from scratch, as if from a cold-boot. Implementation
2821 * resembles the first-half of the e1000_resume routine.
2822 */
atl1c_io_slot_reset(struct pci_dev * pdev)2823 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2824 {
2825 struct net_device *netdev = pci_get_drvdata(pdev);
2826 struct atl1c_adapter *adapter = netdev_priv(netdev);
2827
2828 if (pci_enable_device(pdev)) {
2829 if (netif_msg_hw(adapter))
2830 dev_err(&pdev->dev,
2831 "Cannot re-enable PCI device after reset\n");
2832 return PCI_ERS_RESULT_DISCONNECT;
2833 }
2834 pci_set_master(pdev);
2835
2836 pci_enable_wake(pdev, PCI_D3hot, 0);
2837 pci_enable_wake(pdev, PCI_D3cold, 0);
2838
2839 atl1c_reset_mac(&adapter->hw);
2840
2841 return PCI_ERS_RESULT_RECOVERED;
2842 }
2843
2844 /**
2845 * atl1c_io_resume - called when traffic can start flowing again.
2846 * @pdev: Pointer to PCI device
2847 *
2848 * This callback is called when the error recovery driver tells us that
2849 * its OK to resume normal operation. Implementation resembles the
2850 * second-half of the atl1c_resume routine.
2851 */
atl1c_io_resume(struct pci_dev * pdev)2852 static void atl1c_io_resume(struct pci_dev *pdev)
2853 {
2854 struct net_device *netdev = pci_get_drvdata(pdev);
2855 struct atl1c_adapter *adapter = netdev_priv(netdev);
2856
2857 if (netif_running(netdev)) {
2858 if (atl1c_up(adapter)) {
2859 if (netif_msg_hw(adapter))
2860 dev_err(&pdev->dev,
2861 "Cannot bring device back up after reset\n");
2862 return;
2863 }
2864 }
2865
2866 netif_device_attach(netdev);
2867 }
2868
2869 static const struct pci_error_handlers atl1c_err_handler = {
2870 .error_detected = atl1c_io_error_detected,
2871 .slot_reset = atl1c_io_slot_reset,
2872 .resume = atl1c_io_resume,
2873 };
2874
2875 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2876
2877 static struct pci_driver atl1c_driver = {
2878 .name = atl1c_driver_name,
2879 .id_table = atl1c_pci_tbl,
2880 .probe = atl1c_probe,
2881 .remove = atl1c_remove,
2882 .shutdown = atl1c_shutdown,
2883 .err_handler = &atl1c_err_handler,
2884 .driver.pm = &atl1c_pm_ops,
2885 };
2886
2887 module_pci_driver(atl1c_driver);
2888