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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[deliverable/linux.git] / drivers / net / ethernet / atheros / atl1c / atl1c_main.c
CommitLineData
43250ddd
JY		 1/*
2 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
3 *
4 * Derived from Intel e1000 driver
5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59
19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#include "atl1c.h"
23
ac574804 24#define ATL1C_DRV_VERSION "1.0.1.1-NAPI"
43250ddd
JY		 25char atl1c_driver_name[] = "atl1c";
26char atl1c_driver_version[] = ATL1C_DRV_VERSION;
496c185c 27
43250ddd
JY		 28/*
29 * atl1c_pci_tbl - PCI Device ID Table
30 *
31 * Wildcard entries (PCI_ANY_ID) should come last
32 * Last entry must be all 0s
33 *
34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
35 * Class, Class Mask, private data (not used) }
36 */
9baa3c34 37static const struct pci_device_id atl1c_pci_tbl[] = {
43250ddd
JY		 38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
496c185c
LR		 40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
94dde7e4 43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
43250ddd
JY		 44 /* required last entry */
45 { 0 }
46};
47MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
48
70c9fbd3
HX		 49MODULE_AUTHOR("Jie Yang");
50MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
fe4e4372 51MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
43250ddd
JY		 52MODULE_LICENSE("GPL");
53MODULE_VERSION(ATL1C_DRV_VERSION);
54
55static int atl1c_stop_mac(struct atl1c_hw *hw);
43250ddd 56static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
024e1e4d 57static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
25456e5c 58static void atl1c_start_mac(struct atl1c_adapter *adapter);
9f1fd0ef 59static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
43250ddd 60 int *work_done, int work_to_do);
0fb1e54e 61static int atl1c_up(struct atl1c_adapter *adapter);
62static void atl1c_down(struct atl1c_adapter *adapter);
5e5c0964
HX		 63static int atl1c_reset_mac(struct atl1c_hw *hw);
64static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
65static int atl1c_configure(struct atl1c_adapter *adapter);
66static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
43250ddd 67
43250ddd
JY		 68
69static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
70 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
8f574b35
JY		 71static void atl1c_pcie_patch(struct atl1c_hw *hw)
72{
5cbdcc2f
HX		 73 u32 mst_data, data;
74
75 /* pclk sel could switch to 25M */
76 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
77 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
78 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
43250ddd 79
ebe22ed9
HX		 80 /* WoL/PCIE related settings */
81 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
82 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
83 data |= PCIE_PHYMISC_FORCE_RCV_DET;
84 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
85 } else { /* new dev set bit5 of MASTER */
86 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
87 AT_WRITE_REG(hw, REG_MASTER_CTRL,
88 mst_data | MASTER_CTRL_WAKEN_25M);
89 }
90 /* aspm/PCIE setting only for l2cb 1.0 */
8f574b35
JY		 91 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
92 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
ebe22ed9
HX		 93 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
94 L2CB1_PCIE_PHYMISC2_CDR_BW);
95 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
96 L2CB1_PCIE_PHYMISC2_L0S_TH);
8f574b35 97 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
ebe22ed9
HX		 98 /* extend L1 sync timer */
99 AT_READ_REG(hw, REG_LINK_CTRL, &data);
100 data |= LINK_CTRL_EXT_SYNC;
101 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
102 }
103 /* l2cb 1.x & l1d 1.x */
104 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
105 AT_READ_REG(hw, REG_PM_CTRL, &data);
106 data |= PM_CTRL_L0S_BUFSRX_EN;
107 AT_WRITE_REG(hw, REG_PM_CTRL, data);
108 /* clear vendor msg */
109 AT_READ_REG(hw, REG_DMA_DBG, &data);
110 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
8f574b35
JY		 111 }
112}
113
114/* FIXME: no need any more ? */
43250ddd
JY		 115/*
116 * atl1c_init_pcie - init PCIE module
117 */
118static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
119{
120 u32 data;
121 u32 pci_cmd;
122 struct pci_dev *pdev = hw->adapter->pdev;
95f9aea7 123 int pos;
43250ddd
JY		 124
125 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
126 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
127 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
128 PCI_COMMAND_IO);
129 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
130
131 /*
132 * Clear any PowerSaveing Settings
133 */
134 pci_enable_wake(pdev, PCI_D3hot, 0);
135 pci_enable_wake(pdev, PCI_D3cold, 0);
87eabe6b
HX		 136 /* wol sts read-clear */
137 AT_READ_REG(hw, REG_WOL_CTRL, &data);
138 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
43250ddd
JY		 139
140 /*
141 * Mask some pcie error bits
142 */
95f9aea7 143 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
a4f63634
BD		 144 if (pos) {
145 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
146 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
147 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
148 }
95f9aea7 149 /* clear error status */
eb0ff563 150 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
95f9aea7
HX		 151 PCI_EXP_DEVSTA_NFED |
152 PCI_EXP_DEVSTA_FED |
153 PCI_EXP_DEVSTA_CED |
154 PCI_EXP_DEVSTA_URD);
43250ddd 155
8f574b35
JY		 156 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
157 data &= ~LTSSM_ID_EN_WRO;
158 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
159
160 atl1c_pcie_patch(hw);
43250ddd
JY		 161 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
162 atl1c_disable_l0s_l1(hw);
43250ddd 163
8f574b35 164 msleep(5);
43250ddd
JY		 165}
166
49ce9c2c 167/**
43250ddd
JY		 168 * atl1c_irq_enable - Enable default interrupt generation settings
169 * @adapter: board private structure
170 */
171static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
172{
173 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
174 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
175 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
176 AT_WRITE_FLUSH(&adapter->hw);
177 }
178}
179
49ce9c2c 180/**
43250ddd
JY		 181 * atl1c_irq_disable - Mask off interrupt generation on the NIC
182 * @adapter: board private structure
183 */
184static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
185{
186 atomic_inc(&adapter->irq_sem);
187 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
8f574b35 188 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
43250ddd
JY		 189 AT_WRITE_FLUSH(&adapter->hw);
190 synchronize_irq(adapter->pdev->irq);
191}
192
49ce9c2c 193/**
43250ddd
JY		 194 * atl1c_irq_reset - reset interrupt confiure on the NIC
195 * @adapter: board private structure
196 */
197static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
198{
199 atomic_set(&adapter->irq_sem, 1);
200 atl1c_irq_enable(adapter);
201}
202
c930a662
JP		 203/*
204 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
205 * of the idle status register until the device is actually idle
206 */
969a7ee2 207static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
c930a662
JP		 208{
209 int timeout;
210 u32 data;
211
212 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
213 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
969a7ee2 214 if ((data & modu_ctrl) == 0)
c930a662
JP		 215 return 0;
216 msleep(1);
217 }
218 return data;
219}
220
49ce9c2c 221/**
43250ddd
JY		 222 * atl1c_phy_config - Timer Call-back
223 * @data: pointer to netdev cast into an unsigned long
224 */
225static void atl1c_phy_config(unsigned long data)
226{
227 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
228 struct atl1c_hw *hw = &adapter->hw;
229 unsigned long flags;
230
231 spin_lock_irqsave(&adapter->mdio_lock, flags);
232 atl1c_restart_autoneg(hw);
233 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
234}
235
236void atl1c_reinit_locked(struct atl1c_adapter *adapter)
237{
43250ddd
JY		 238 WARN_ON(in_interrupt());
239 atl1c_down(adapter);
240 atl1c_up(adapter);
241 clear_bit(__AT_RESETTING, &adapter->flags);
242}
243
43250ddd
JY		 244static void atl1c_check_link_status(struct atl1c_adapter *adapter)
245{
246 struct atl1c_hw *hw = &adapter->hw;
247 struct net_device *netdev = adapter->netdev;
248 struct pci_dev *pdev = adapter->pdev;
249 int err;
250 unsigned long flags;
251 u16 speed, duplex, phy_data;
252
253 spin_lock_irqsave(&adapter->mdio_lock, flags);
254 /* MII_BMSR must read twise */
255 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
256 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
257 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
258
259 if ((phy_data & BMSR_LSTATUS) == 0) {
260 /* link down */
5e5c0964 261 netif_carrier_off(netdev);
8f574b35 262 hw->hibernate = true;
5e5c0964 263 if (atl1c_reset_mac(hw) != 0)
8f574b35 264 if (netif_msg_hw(adapter))
5e5c0964 265 dev_warn(&pdev->dev, "reset mac failed\n");
024e1e4d 266 atl1c_set_aspm(hw, SPEED_0);
903d7ce0 267 atl1c_post_phy_linkchg(hw, SPEED_0);
5e5c0964
HX		 268 atl1c_reset_dma_ring(adapter);
269 atl1c_configure(adapter);
43250ddd
JY		 270 } else {
271 /* Link Up */
272 hw->hibernate = false;
273 spin_lock_irqsave(&adapter->mdio_lock, flags);
274 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
275 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
276 if (unlikely(err))
277 return;
278 /* link result is our setting */
279 if (adapter->link_speed != speed ||
280 adapter->link_duplex != duplex) {
281 adapter->link_speed = speed;
282 adapter->link_duplex = duplex;
024e1e4d 283 atl1c_set_aspm(hw, speed);
903d7ce0 284 atl1c_post_phy_linkchg(hw, speed);
25456e5c 285 atl1c_start_mac(adapter);
43250ddd
JY		 286 if (netif_msg_link(adapter))
287 dev_info(&pdev->dev,
288 "%s: %s NIC Link is Up<%d Mbps %s>\n",
289 atl1c_driver_name, netdev->name,
290 adapter->link_speed,
291 adapter->link_duplex == FULL_DUPLEX ?
292 "Full Duplex" : "Half Duplex");
293 }
294 if (!netif_carrier_ok(netdev))
295 netif_carrier_on(netdev);
296 }
297}
298
43250ddd
JY		 299static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
300{
301 struct net_device *netdev = adapter->netdev;
302 struct pci_dev *pdev = adapter->pdev;
303 u16 phy_data;
304 u16 link_up;
305
306 spin_lock(&adapter->mdio_lock);
307 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
308 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
309 spin_unlock(&adapter->mdio_lock);
310 link_up = phy_data & BMSR_LSTATUS;
311 /* notify upper layer link down ASAP */
312 if (!link_up) {
313 if (netif_carrier_ok(netdev)) {
314 /* old link state: Up */
315 netif_carrier_off(netdev);
316 if (netif_msg_link(adapter))
317 dev_info(&pdev->dev,
318 "%s: %s NIC Link is Down\n",
319 atl1c_driver_name, netdev->name);
320 adapter->link_speed = SPEED_0;
321 }
322 }
cb190546 323
cb771838 324 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
cb190546 325 schedule_work(&adapter->common_task);
43250ddd
JY		 326}
327
cb190546 328static void atl1c_common_task(struct work_struct *work)
43250ddd 329{
cb190546
JY		 330 struct atl1c_adapter *adapter;
331 struct net_device *netdev;
332
333 adapter = container_of(work, struct atl1c_adapter, common_task);
334 netdev = adapter->netdev;
335
0aa76ce3
HX		 336 if (test_bit(__AT_DOWN, &adapter->flags))
337 return;
338
cb771838 339 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
cb190546
JY		 340 netif_device_detach(netdev);
341 atl1c_down(adapter);
342 atl1c_up(adapter);
343 netif_device_attach(netdev);
cb190546
JY		 344 }
345
cb771838 346 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
5e5c0964
HX		 347 &adapter->work_event)) {
348 atl1c_irq_disable(adapter);
cb190546 349 atl1c_check_link_status(adapter);
5e5c0964
HX		 350 atl1c_irq_enable(adapter);
351 }
43250ddd
JY		 352}
353
cb190546
JY		 354
355static void atl1c_del_timer(struct atl1c_adapter *adapter)
43250ddd 356{
cb190546 357 del_timer_sync(&adapter->phy_config_timer);
43250ddd
JY		 358}
359
cb190546 360
49ce9c2c 361/**
43250ddd
JY		 362 * atl1c_tx_timeout - Respond to a Tx Hang
363 * @netdev: network interface device structure
364 */
365static void atl1c_tx_timeout(struct net_device *netdev)
366{
367 struct atl1c_adapter *adapter = netdev_priv(netdev);
368
369 /* Do the reset outside of interrupt context */
cb771838 370 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
cb190546 371 schedule_work(&adapter->common_task);
43250ddd
JY		 372}
373
49ce9c2c 374/**
43250ddd
JY		 375 * atl1c_set_multi - Multicast and Promiscuous mode set
376 * @netdev: network interface device structure
377 *
378 * The set_multi entry point is called whenever the multicast address
379 * list or the network interface flags are updated. This routine is
380 * responsible for configuring the hardware for proper multicast,
381 * promiscuous mode, and all-multi behavior.
382 */
383static void atl1c_set_multi(struct net_device *netdev)
384{
385 struct atl1c_adapter *adapter = netdev_priv(netdev);
386 struct atl1c_hw *hw = &adapter->hw;
22bedad3 387 struct netdev_hw_addr *ha;
43250ddd
JY		 388 u32 mac_ctrl_data;
389 u32 hash_value;
390
391 /* Check for Promiscuous and All Multicast modes */
392 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
393
394 if (netdev->flags & IFF_PROMISC) {
395 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
396 } else if (netdev->flags & IFF_ALLMULTI) {
397 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
398 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
399 } else {
400 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
401 }
402
403 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
404
405 /* clear the old settings from the multicast hash table */
406 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
407 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
408
409 /* comoute mc addresses' hash value ,and put it into hash table */
22bedad3
JP		 410 netdev_for_each_mc_addr(ha, netdev) {
411 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
43250ddd
JY		 412 atl1c_hash_set(hw, hash_value);
413 }
414}
415
c8f44aff 416static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
46facce9 417{
f646968f 418 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
46facce9
JP		 419 /* enable VLAN tag insert/strip */
420 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
421 } else {
422 /* disable VLAN tag insert/strip */
423 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
424 }
425}
426
c8f44aff
MM		 427static void atl1c_vlan_mode(struct net_device *netdev,
428 netdev_features_t features)
43250ddd
JY		 429{
430 struct atl1c_adapter *adapter = netdev_priv(netdev);
431 struct pci_dev *pdev = adapter->pdev;
432 u32 mac_ctrl_data = 0;
433
434 if (netif_msg_pktdata(adapter))
46facce9 435 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
43250ddd
JY		 436
437 atl1c_irq_disable(adapter);
43250ddd 438 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
46facce9 439 __atl1c_vlan_mode(features, &mac_ctrl_data);
43250ddd
JY		 440 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
441 atl1c_irq_enable(adapter);
442}
443
444static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
445{
446 struct pci_dev *pdev = adapter->pdev;
447
448 if (netif_msg_pktdata(adapter))
46facce9
JP		 449 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
450 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
43250ddd 451}
46facce9 452
49ce9c2c 453/**
43250ddd
JY		 454 * atl1c_set_mac - Change the Ethernet Address of the NIC
455 * @netdev: network interface device structure
456 * @p: pointer to an address structure
457 *
458 * Returns 0 on success, negative on failure
459 */
460static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
461{
462 struct atl1c_adapter *adapter = netdev_priv(netdev);
463 struct sockaddr *addr = p;
464
465 if (!is_valid_ether_addr(addr->sa_data))
466 return -EADDRNOTAVAIL;
467
468 if (netif_running(netdev))
469 return -EBUSY;
470
471 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
472 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
473
229e6b6e 474 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
43250ddd
JY		 475
476 return 0;
477}
478
479static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
480 struct net_device *dev)
481{
7b701764 482 unsigned int head_size;
43250ddd
JY		 483 int mtu = dev->mtu;
484
485 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
486 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
7b701764
ED		 487
488 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
489 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
490 adapter->rx_frag_size = roundup_pow_of_two(head_size);
43250ddd 491}
782d640a 492
c8f44aff
MM		 493static netdev_features_t atl1c_fix_features(struct net_device *netdev,
494 netdev_features_t features)
782d640a 495{
46facce9
JP		 496 /*
497 * Since there is no support for separate rx/tx vlan accel
498 * enable/disable make sure tx flag is always in same state as rx.
499 */
f646968f
PM		 500 if (features & NETIF_F_HW_VLAN_CTAG_RX)
501 features |= NETIF_F_HW_VLAN_CTAG_TX;
46facce9 502 else
f646968f 503 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
46facce9 504
782d640a
MM		 505 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
506 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
507
508 return features;
509}
510
c8f44aff
MM		 511static int atl1c_set_features(struct net_device *netdev,
512 netdev_features_t features)
46facce9 513{
c8f44aff 514 netdev_features_t changed = netdev->features ^ features;
46facce9 515
f646968f 516 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
46facce9
JP		 517 atl1c_vlan_mode(netdev, features);
518
519 return 0;
520}
521
49ce9c2c 522/**
43250ddd
JY		 523 * atl1c_change_mtu - Change the Maximum Transfer Unit
524 * @netdev: network interface device structure
525 * @new_mtu: new value for maximum frame size
526 *
527 * Returns 0 on success, negative on failure
528 */
529static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
530{
531 struct atl1c_adapter *adapter = netdev_priv(netdev);
c08b9b2a 532 struct atl1c_hw *hw = &adapter->hw;
43250ddd
JY		 533 int old_mtu = netdev->mtu;
534 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
535
c08b9b2a
HX		 536 /* Fast Ethernet controller doesn't support jumbo packet */
537 if (((hw->nic_type == athr_l2c ||
538 hw->nic_type == athr_l2c_b ||
539 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
540 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
541 max_frame > MAX_JUMBO_FRAME_SIZE) {
43250ddd
JY		 542 if (netif_msg_link(adapter))
543 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
544 return -EINVAL;
545 }
546 /* set MTU */
547 if (old_mtu != new_mtu && netif_running(netdev)) {
548 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
549 msleep(1);
550 netdev->mtu = new_mtu;
551 adapter->hw.max_frame_size = new_mtu;
552 atl1c_set_rxbufsize(adapter, netdev);
553 atl1c_down(adapter);
782d640a 554 netdev_update_features(netdev);
43250ddd
JY		 555 atl1c_up(adapter);
556 clear_bit(__AT_RESETTING, &adapter->flags);
43250ddd
JY		 557 }
558 return 0;
559}
560
561/*
562 * caller should hold mdio_lock
563 */
564static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
565{
566 struct atl1c_adapter *adapter = netdev_priv(netdev);
567 u16 result;
568
2528a5dc 569 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
43250ddd
JY		 570 return result;
571}
572
573static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
574 int reg_num, int val)
575{
576 struct atl1c_adapter *adapter = netdev_priv(netdev);
577
2528a5dc 578 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
43250ddd
JY		 579}
580
43250ddd
JY		 581static int atl1c_mii_ioctl(struct net_device *netdev,
582 struct ifreq *ifr, int cmd)
583{
584 struct atl1c_adapter *adapter = netdev_priv(netdev);
585 struct pci_dev *pdev = adapter->pdev;
586 struct mii_ioctl_data *data = if_mii(ifr);
587 unsigned long flags;
588 int retval = 0;
589
590 if (!netif_running(netdev))
591 return -EINVAL;
592
593 spin_lock_irqsave(&adapter->mdio_lock, flags);
594 switch (cmd) {
595 case SIOCGMIIPHY:
596 data->phy_id = 0;
597 break;
598
599 case SIOCGMIIREG:
43250ddd
JY		 600 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
601 &data->val_out)) {
602 retval = -EIO;
603 goto out;
604 }
605 break;
606
607 case SIOCSMIIREG:
43250ddd
JY		 608 if (data->reg_num & ~(0x1F)) {
609 retval = -EFAULT;
610 goto out;
611 }
612
613 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
614 data->reg_num, data->val_in);
615 if (atl1c_write_phy_reg(&adapter->hw,
616 data->reg_num, data->val_in)) {
617 retval = -EIO;
618 goto out;
619 }
620 break;
621
622 default:
623 retval = -EOPNOTSUPP;
624 break;
625 }
626out:
627 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
628 return retval;
629}
630
43250ddd
JY		 631static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
632{
633 switch (cmd) {
634 case SIOCGMIIPHY:
635 case SIOCGMIIREG:
636 case SIOCSMIIREG:
637 return atl1c_mii_ioctl(netdev, ifr, cmd);
638 default:
639 return -EOPNOTSUPP;
640 }
641}
642
49ce9c2c 643/**
43250ddd
JY		 644 * atl1c_alloc_queues - Allocate memory for all rings
645 * @adapter: board private structure to initialize
646 *
647 */
093d369d 648static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
43250ddd
JY		 649{
650 return 0;
651}
652
653static void atl1c_set_mac_type(struct atl1c_hw *hw)
654{
655 switch (hw->device_id) {
656 case PCI_DEVICE_ID_ATTANSIC_L2C:
657 hw->nic_type = athr_l2c;
658 break;
43250ddd
JY		 659 case PCI_DEVICE_ID_ATTANSIC_L1C:
660 hw->nic_type = athr_l1c;
661 break;
496c185c
LR		 662 case PCI_DEVICE_ID_ATHEROS_L2C_B:
663 hw->nic_type = athr_l2c_b;
664 break;
665 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
666 hw->nic_type = athr_l2c_b2;
667 break;
668 case PCI_DEVICE_ID_ATHEROS_L1D:
669 hw->nic_type = athr_l1d;
670 break;
8f574b35
JY		 671 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
672 hw->nic_type = athr_l1d_2;
673 break;
43250ddd
JY		 674 default:
675 break;
676 }
677}
678
679static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
680{
43250ddd
JY		 681 u32 link_ctrl_data;
682
683 atl1c_set_mac_type(hw);
43250ddd
JY		 684 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
685
8f574b35 686 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
43250ddd 687 ATL1C_TXQ_MODE_ENHANCE;
024e1e4d
HX		 688 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
689 ATL1C_ASPM_L1_SUPPORT;
8f574b35 690 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
43250ddd 691
496c185c 692 if (hw->nic_type == athr_l1c ||
8f574b35
JY		 693 hw->nic_type == athr_l1d ||
694 hw->nic_type == athr_l1d_2)
496c185c 695 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
43250ddd
JY		 696 return 0;
697}
903d7ce0
HX		 698
699struct atl1c_platform_patch {
700 u16 pci_did;
701 u8 pci_revid;
702 u16 subsystem_vid;
703 u16 subsystem_did;
704 u32 patch_flag;
705#define ATL1C_LINK_PATCH 0x1
706};
093d369d 707static const struct atl1c_platform_patch plats[] = {
903d7ce0
HX		 708{0x2060, 0xC1, 0x1019, 0x8152, 0x1},
709{0x2060, 0xC1, 0x1019, 0x2060, 0x1},
710{0x2060, 0xC1, 0x1019, 0xE000, 0x1},
711{0x2062, 0xC0, 0x1019, 0x8152, 0x1},
712{0x2062, 0xC0, 0x1019, 0x2062, 0x1},
713{0x2062, 0xC0, 0x1458, 0xE000, 0x1},
714{0x2062, 0xC1, 0x1019, 0x8152, 0x1},
715{0x2062, 0xC1, 0x1019, 0x2062, 0x1},
716{0x2062, 0xC1, 0x1458, 0xE000, 0x1},
717{0x2062, 0xC1, 0x1565, 0x2802, 0x1},
718{0x2062, 0xC1, 0x1565, 0x2801, 0x1},
719{0x1073, 0xC0, 0x1019, 0x8151, 0x1},
720{0x1073, 0xC0, 0x1019, 0x1073, 0x1},
721{0x1073, 0xC0, 0x1458, 0xE000, 0x1},
722{0x1083, 0xC0, 0x1458, 0xE000, 0x1},
723{0x1083, 0xC0, 0x1019, 0x8151, 0x1},
724{0x1083, 0xC0, 0x1019, 0x1083, 0x1},
725{0x1083, 0xC0, 0x1462, 0x7680, 0x1},
726{0x1083, 0xC0, 0x1565, 0x2803, 0x1},
727{0},
728};
729
093d369d 730static void atl1c_patch_assign(struct atl1c_hw *hw)
903d7ce0 731{
fa0afcd1
CR		 732 struct pci_dev *pdev = hw->adapter->pdev;
733 u32 misc_ctrl;
903d7ce0
HX		 734 int i = 0;
735
736 hw->msi_lnkpatch = false;
737
738 while (plats[i].pci_did != 0) {
739 if (plats[i].pci_did == hw->device_id &&
740 plats[i].pci_revid == hw->revision_id &&
741 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
742 plats[i].subsystem_did == hw->subsystem_id) {
743 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
744 hw->msi_lnkpatch = true;
745 }
746 i++;
747 }
fa0afcd1
CR		 748
749 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
750 hw->revision_id == L2CB_V21) {
dbedd44e 751 /* config access mode */
fa0afcd1
CR		 752 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
753 REG_PCIE_DEV_MISC_CTRL);
754 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
755 misc_ctrl &= ~0x100;
756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
757 REG_PCIE_DEV_MISC_CTRL);
758 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
759 }
903d7ce0 760}
49ce9c2c 761/**
43250ddd
JY		 762 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
763 * @adapter: board private structure to initialize
764 *
765 * atl1c_sw_init initializes the Adapter private data structure.
766 * Fields are initialized based on PCI device information and
767 * OS network device settings (MTU size).
768 */
093d369d 769static int atl1c_sw_init(struct atl1c_adapter *adapter)
43250ddd
JY		 770{
771 struct atl1c_hw *hw = &adapter->hw;
772 struct pci_dev *pdev = adapter->pdev;
8f574b35
JY		 773 u32 revision;
774
43250ddd
JY		 775
776 adapter->wol = 0;
762e3023 777 device_set_wakeup_enable(&pdev->dev, false);
43250ddd
JY		 778 adapter->link_speed = SPEED_0;
779 adapter->link_duplex = FULL_DUPLEX;
43250ddd 780 adapter->tpd_ring[0].count = 1024;
9f1fd0ef 781 adapter->rfd_ring.count = 512;
43250ddd
JY		 782
783 hw->vendor_id = pdev->vendor;
784 hw->device_id = pdev->device;
785 hw->subsystem_vendor_id = pdev->subsystem_vendor;
786 hw->subsystem_id = pdev->subsystem_device;
fa0afcd1 787 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
8f574b35 788 hw->revision_id = revision & 0xFF;
43250ddd
JY		 789 /* before link up, we assume hibernate is true */
790 hw->hibernate = true;
791 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
792 if (atl1c_setup_mac_funcs(hw) != 0) {
793 dev_err(&pdev->dev, "set mac function pointers failed\n");
794 return -1;
795 }
903d7ce0
HX		 796 atl1c_patch_assign(hw);
797
43250ddd
JY		 798 hw->intr_mask = IMR_NORMAL_MASK;
799 hw->phy_configured = false;
800 hw->preamble_len = 7;
801 hw->max_frame_size = adapter->netdev->mtu;
43250ddd
JY		 802 hw->autoneg_advertised = ADVERTISED_Autoneg;
803 hw->indirect_tab = 0xE4E4E4E4;
804 hw->base_cpu = 0;
805
806 hw->ict = 50000; /* 100ms */
807 hw->smb_timer = 200000; /* 400ms */
43250ddd
JY		 808 hw->rx_imt = 200;
809 hw->tx_imt = 1000;
810
811 hw->tpd_burst = 5;
812 hw->rfd_burst = 8;
813 hw->dma_order = atl1c_dma_ord_out;
814 hw->dmar_block = atl1c_dma_req_1024;
43250ddd
JY		 815
816 if (atl1c_alloc_queues(adapter)) {
817 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
818 return -ENOMEM;
819 }
820 /* TODO */
821 atl1c_set_rxbufsize(adapter, adapter->netdev);
822 atomic_set(&adapter->irq_sem, 1);
823 spin_lock_init(&adapter->mdio_lock);
43250ddd
JY		 824 set_bit(__AT_DOWN, &adapter->flags);
825
826 return 0;
827}
828
c6060be4 829static inline void atl1c_clean_buffer(struct pci_dev *pdev,
07641c8f 830 struct atl1c_buffer *buffer_info)
c6060be4 831{
4b45e342 832 u16 pci_driection;
c6060be4
JY		 833 if (buffer_info->flags & ATL1C_BUFFER_FREE)
834 return;
835 if (buffer_info->dma) {
4b45e342
JY		 836 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
837 pci_driection = PCI_DMA_FROMDEVICE;
838 else
839 pci_driection = PCI_DMA_TODEVICE;
840
c6060be4
JY		 841 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
842 pci_unmap_single(pdev, buffer_info->dma,
4b45e342 843 buffer_info->length, pci_driection);
c6060be4
JY		 844 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
845 pci_unmap_page(pdev, buffer_info->dma,
4b45e342 846 buffer_info->length, pci_driection);
c6060be4 847 }
07641c8f
EB		 848 if (buffer_info->skb)
849 dev_consume_skb_any(buffer_info->skb);
c6060be4
JY		 850 buffer_info->dma = 0;
851 buffer_info->skb = NULL;
852 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
853}
49ce9c2c 854/**
43250ddd
JY		 855 * atl1c_clean_tx_ring - Free Tx-skb
856 * @adapter: board private structure
857 */
858static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
859 enum atl1c_trans_queue type)
860{
861 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
862 struct atl1c_buffer *buffer_info;
863 struct pci_dev *pdev = adapter->pdev;
864 u16 index, ring_count;
865
866 ring_count = tpd_ring->count;
867 for (index = 0; index < ring_count; index++) {
868 buffer_info = &tpd_ring->buffer_info[index];
07641c8f 869 atl1c_clean_buffer(pdev, buffer_info);
43250ddd
JY		 870 }
871
47b344b2
RA		 872 netdev_reset_queue(adapter->netdev);
873
43250ddd
JY		 874 /* Zero out Tx-buffers */
875 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
c6060be4 876 ring_count);
43250ddd
JY		 877 atomic_set(&tpd_ring->next_to_clean, 0);
878 tpd_ring->next_to_use = 0;
879}
880
49ce9c2c 881/**
43250ddd
JY		 882 * atl1c_clean_rx_ring - Free rx-reservation skbs
883 * @adapter: board private structure
884 */
885static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
886{
9f1fd0ef
HX		 887 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
888 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 889 struct atl1c_buffer *buffer_info;
890 struct pci_dev *pdev = adapter->pdev;
9f1fd0ef 891 int j;
43250ddd 892
9f1fd0ef
HX		 893 for (j = 0; j < rfd_ring->count; j++) {
894 buffer_info = &rfd_ring->buffer_info[j];
07641c8f 895 atl1c_clean_buffer(pdev, buffer_info);
43250ddd 896 }
9f1fd0ef
HX		 897 /* zero out the descriptor ring */
898 memset(rfd_ring->desc, 0, rfd_ring->size);
899 rfd_ring->next_to_clean = 0;
900 rfd_ring->next_to_use = 0;
901 rrd_ring->next_to_use = 0;
902 rrd_ring->next_to_clean = 0;
43250ddd
JY		 903}
904
905/*
906 * Read / Write Ptr Initialize:
907 */
908static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
909{
910 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
9f1fd0ef
HX		 911 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
912 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 913 struct atl1c_buffer *buffer_info;
914 int i, j;
915
916 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
917 tpd_ring[i].next_to_use = 0;
918 atomic_set(&tpd_ring[i].next_to_clean, 0);
919 buffer_info = tpd_ring[i].buffer_info;
920 for (j = 0; j < tpd_ring->count; j++)
c6060be4
JY		 921 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
922 ATL1C_BUFFER_FREE);
43250ddd 923 }
9f1fd0ef
HX		 924 rfd_ring->next_to_use = 0;
925 rfd_ring->next_to_clean = 0;
926 rrd_ring->next_to_use = 0;
927 rrd_ring->next_to_clean = 0;
928 for (j = 0; j < rfd_ring->count; j++) {
929 buffer_info = &rfd_ring->buffer_info[j];
930 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
43250ddd
JY		 931 }
932}
933
49ce9c2c 934/**
43250ddd
JY		 935 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
936 * @adapter: board private structure
937 *
938 * Free all transmit software resources
939 */
940static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
941{
942 struct pci_dev *pdev = adapter->pdev;
943
944 pci_free_consistent(pdev, adapter->ring_header.size,
945 adapter->ring_header.desc,
946 adapter->ring_header.dma);
947 adapter->ring_header.desc = NULL;
948
949 /* Note: just free tdp_ring.buffer_info,
950 * it contain rfd_ring.buffer_info, do not double free */
951 if (adapter->tpd_ring[0].buffer_info) {
952 kfree(adapter->tpd_ring[0].buffer_info);
953 adapter->tpd_ring[0].buffer_info = NULL;
954 }
7b701764
ED		 955 if (adapter->rx_page) {
956 put_page(adapter->rx_page);
957 adapter->rx_page = NULL;
958 }
43250ddd
JY		 959}
960
49ce9c2c 961/**
43250ddd
JY		 962 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
963 * @adapter: board private structure
964 *
965 * Return 0 on success, negative on failure
966 */
967static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
968{
969 struct pci_dev *pdev = adapter->pdev;
970 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
9f1fd0ef
HX		 971 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
972 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd 973 struct atl1c_ring_header *ring_header = &adapter->ring_header;
43250ddd
JY		 974 int size;
975 int i;
976 int count = 0;
977 int rx_desc_count = 0;
978 u32 offset = 0;
979
9f1fd0ef 980 rrd_ring->count = rfd_ring->count;
43250ddd
JY		 981 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
982 tpd_ring[i].count = tpd_ring[0].count;
983
43250ddd
JY		 984 /* 2 tpd queue, one high priority queue,
985 * another normal priority queue */
986 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
9f1fd0ef 987 rfd_ring->count);
43250ddd 988 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
b2adaca9 989 if (unlikely(!tpd_ring->buffer_info))
43250ddd 990 goto err_nomem;
b2adaca9 991
43250ddd
JY		 992 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
993 tpd_ring[i].buffer_info =
64699336 994 (tpd_ring->buffer_info + count);
43250ddd
JY		 995 count += tpd_ring[i].count;
996 }
997
9f1fd0ef 998 rfd_ring->buffer_info =
64699336 999 (tpd_ring->buffer_info + count);
9f1fd0ef
HX		 1000 count += rfd_ring->count;
1001 rx_desc_count += rfd_ring->count;
1002
43250ddd
JY		 1003 /*
1004 * real ring DMA buffer
1005 * each ring/block may need up to 8 bytes for alignment, hence the
1006 * additional bytes tacked onto the end.
1007 */
1008 ring_header->size = size =
1009 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1010 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1011 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
8d5c6836 1012 8 * 4;
43250ddd 1013
f2a3771a
PM		 1014 ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size,
1015 &ring_header->dma, GFP_KERNEL);
43250ddd 1016 if (unlikely(!ring_header->desc)) {
f2a3771a 1017 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
43250ddd
JY		 1018 goto err_nomem;
1019 }
43250ddd
JY		 1020 /* init TPD ring */
1021
1022 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1023 offset = tpd_ring[0].dma - ring_header->dma;
1024 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1025 tpd_ring[i].dma = ring_header->dma + offset;
1026 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1027 tpd_ring[i].size =
1028 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1029 offset += roundup(tpd_ring[i].size, 8);
1030 }
1031 /* init RFD ring */
9f1fd0ef
HX		 1032 rfd_ring->dma = ring_header->dma + offset;
1033 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1034 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1035 offset += roundup(rfd_ring->size, 8);
43250ddd
JY		 1036
1037 /* init RRD ring */
9f1fd0ef
HX		 1038 rrd_ring->dma = ring_header->dma + offset;
1039 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1040 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1041 rrd_ring->count;
1042 offset += roundup(rrd_ring->size, 8);
43250ddd 1043
43250ddd
JY		 1044 return 0;
1045
1046err_nomem:
1047 kfree(tpd_ring->buffer_info);
1048 return -ENOMEM;
1049}
1050
1051static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1052{
1053 struct atl1c_hw *hw = &adapter->hw;
9f1fd0ef
HX		 1054 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1055 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 1056 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1057 adapter->tpd_ring;
43250ddd
JY		 1058
1059 /* TPD */
1060 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1061 (u32)((tpd_ring[atl1c_trans_normal].dma &
1062 AT_DMA_HI_ADDR_MASK) >> 32));
1063 /* just enable normal priority TX queue */
0af48336 1064 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
43250ddd
JY		 1065 (u32)(tpd_ring[atl1c_trans_normal].dma &
1066 AT_DMA_LO_ADDR_MASK));
0af48336 1067 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
43250ddd
JY		 1068 (u32)(tpd_ring[atl1c_trans_high].dma &
1069 AT_DMA_LO_ADDR_MASK));
1070 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1071 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1072
1073
1074 /* RFD */
1075 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
9f1fd0ef
HX		 1076 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1077 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1078 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
43250ddd
JY		 1079
1080 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
9f1fd0ef 1081 rfd_ring->count & RFD_RING_SIZE_MASK);
43250ddd
JY		 1082 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1083 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1084
1085 /* RRD */
9f1fd0ef
HX		 1086 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1087 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
43250ddd 1088 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
9f1fd0ef 1089 (rrd_ring->count & RRD_RING_SIZE_MASK));
43250ddd 1090
8f574b35
JY		 1091 if (hw->nic_type == athr_l2c_b) {
1092 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1093 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1094 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1095 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1096 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1097 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1098 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1099 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1100 }
43250ddd
JY		 1101 /* Load all of base address above */
1102 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1103}
1104
1105static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1106{
1107 struct atl1c_hw *hw = &adapter->hw;
59e26eff 1108 int max_pay_load;
43250ddd
JY		 1109 u16 tx_offload_thresh;
1110 u32 txq_ctrl_data;
43250ddd 1111
c08b9b2a 1112 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
43250ddd
JY		 1113 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1114 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
59e26eff 1115 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
81b504b8 1116 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
59e26eff
HX		 1117 /*
1118 * if BIOS had changed the dam-read-max-length to an invalid value,
1119 * restore it to default value
1120 */
1121 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1122 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1123 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1124 }
c24588af
HX		 1125 txq_ctrl_data =
1126 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1127 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
43250ddd
JY		 1128
1129 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1130}
1131
1132static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1133{
1134 struct atl1c_hw *hw = &adapter->hw;
1135 u32 rxq_ctrl_data;
1136
1137 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1138 RXQ_RFD_BURST_NUM_SHIFT;
1139
1140 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1141 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
9f1fd0ef 1142
9c528218
HX		 1143 /* aspm for gigabit */
1144 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1145 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1146 ASPM_THRUPUT_LIMIT_100M);
43250ddd
JY		 1147
1148 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1149}
1150
43250ddd
JY		 1151static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1152{
1153 struct atl1c_hw *hw = &adapter->hw;
1154 u32 dma_ctrl_data;
1155
37bfccb5
HX		 1156 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1157 DMA_CTRL_RREQ_PRI_DATA |
1158 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1159 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1160 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
43250ddd
JY		 1161
1162 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1163}
1164
1165/*
1166 * Stop the mac, transmit and receive units
1167 * hw - Struct containing variables accessed by shared code
1168 * return : 0 or idle status (if error)
1169 */
1170static int atl1c_stop_mac(struct atl1c_hw *hw)
1171{
1172 u32 data;
43250ddd
JY		 1173
1174 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
027392c2 1175 data &= ~RXQ_CTRL_EN;
43250ddd
JY		 1176 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1177
1178 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1179 data &= ~TXQ_CTRL_EN;
0cbec61c 1180 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
43250ddd 1181
969a7ee2 1182 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
43250ddd
JY		 1183
1184 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1185 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1186 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1187
969a7ee2
HX		 1188 return (int)atl1c_wait_until_idle(hw,
1189 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
43250ddd
JY		 1190}
1191
25456e5c 1192static void atl1c_start_mac(struct atl1c_adapter *adapter)
43250ddd 1193{
25456e5c
HX		 1194 struct atl1c_hw *hw = &adapter->hw;
1195 u32 mac, txq, rxq;
1196
1197 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1198 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1199 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1200
1201 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1202 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1203 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1204
1205 txq |= TXQ_CTRL_EN;
1206 rxq |= RXQ_CTRL_EN;
1207 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1208 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1209 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1210 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1211 MAC_CTRL_HASH_ALG_CRC32;
1212 if (hw->mac_duplex)
1213 mac |= MAC_CTRL_DUPLX;
1214 else
1215 mac &= ~MAC_CTRL_DUPLX;
1216 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1217 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
43250ddd 1218
25456e5c
HX		 1219 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1220 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1221 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
43250ddd
JY		 1222}
1223
1224/*
1225 * Reset the transmit and receive units; mask and clear all interrupts.
1226 * hw - Struct containing variables accessed by shared code
1227 * return : 0 or idle status (if error)
1228 */
1229static int atl1c_reset_mac(struct atl1c_hw *hw)
1230{
64699336 1231 struct atl1c_adapter *adapter = hw->adapter;
43250ddd 1232 struct pci_dev *pdev = adapter->pdev;
7737fd96 1233 u32 ctrl_data = 0;
43250ddd 1234
8f574b35 1235 atl1c_stop_mac(hw);
43250ddd
JY		 1236 /*
1237 * Issue Soft Reset to the MAC. This will reset the chip's
1238 * transmit, receive, DMA. It will not effect
1239 * the current PCI configuration. The global reset bit is self-
1240 * clearing, and should clear within a microsecond.
1241 */
7737fd96
HX		 1242 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1243 ctrl_data |= MASTER_CTRL_OOB_DIS;
1244 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
8f574b35 1245
43250ddd
JY		 1246 AT_WRITE_FLUSH(hw);
1247 msleep(10);
1248 /* Wait at least 10ms for All module to be Idle */
c930a662 1249
969a7ee2 1250 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
43250ddd 1251 dev_err(&pdev->dev,
c930a662 1252 "MAC state machine can't be idle since"
43250ddd
JY		 1253 " disabled for 10ms second\n");
1254 return -1;
1255 }
7737fd96
HX		 1256 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1257
1258 /* driver control speed/duplex */
1259 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1260 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1261
1262 /* clk switch setting */
1263 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1264 switch (hw->nic_type) {
1265 case athr_l2c_b:
1266 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1267 SERDES_MAC_CLK_SLOWDOWN);
1268 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1269 break;
1270 case athr_l2c_b2:
1271 case athr_l1d_2:
1272 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1273 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1274 break;
1275 default:
1276 break;
1277 }
ebe22ed9 1278
43250ddd
JY		 1279 return 0;
1280}
1281
1282static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1283{
024e1e4d 1284 u16 ctrl_flags = hw->ctrl_flags;
43250ddd 1285
024e1e4d
HX		 1286 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1287 atl1c_set_aspm(hw, SPEED_0);
1288 hw->ctrl_flags = ctrl_flags;
43250ddd
JY		 1289}
1290
1291/*
1292 * Set ASPM state.
1293 * Enable/disable L0s/L1 depend on link state.
1294 */
024e1e4d 1295static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
43250ddd
JY		 1296{
1297 u32 pm_ctrl_data;
024e1e4d 1298 u32 link_l1_timer;
43250ddd
JY		 1299
1300 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
024e1e4d
HX		 1301 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1302 PM_CTRL_ASPM_L0S_EN |
1303 PM_CTRL_MAC_ASPM_CHK);
1304 /* L1 timer */
1305 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1306 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1307 link_l1_timer =
1308 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1309 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1310 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1311 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1312 } else {
1313 link_l1_timer = hw->nic_type == athr_l2c_b ?
1314 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1315 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1316 link_l1_timer = 1;
1317 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1318 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1319 }
496c185c 1320
024e1e4d 1321 /* L0S/L1 enable */
4fc36352 1322 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
024e1e4d
HX		 1323 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1324 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1325 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
496c185c 1326
024e1e4d 1327 /* l2cb & l1d & l2cb2 & l1d2 */
8f574b35 1328 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
024e1e4d
HX		 1329 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1330 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1331 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1332 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1333 PM_CTRL_SERDES_PD_EX_L1 |
1334 PM_CTRL_CLK_SWH_L1;
1335 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1336 PM_CTRL_SERDES_PLL_L1_EN |
1337 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1338 PM_CTRL_SA_DLY_EN |
1339 PM_CTRL_HOTRST);
1340 /* disable l0s if link down or l2cb */
1341 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
496c185c 1342 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
024e1e4d
HX		 1343 } else { /* l1c */
1344 pm_ctrl_data =
1345 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1346 if (link_speed != SPEED_0) {
1347 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1348 PM_CTRL_SERDES_PLL_L1_EN |
1349 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1350 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1351 PM_CTRL_CLK_SWH_L1 |
1352 PM_CTRL_ASPM_L0S_EN |
1353 PM_CTRL_ASPM_L1_EN);
1354 } else { /* link down */
1355 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1356 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1357 PM_CTRL_SERDES_PLL_L1_EN |
1358 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1359 PM_CTRL_ASPM_L0S_EN);
8f574b35 1360 }
43250ddd 1361 }
43250ddd 1362 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
8f574b35
JY		 1363
1364 return;
43250ddd
JY		 1365}
1366
49ce9c2c 1367/**
43250ddd
JY		 1368 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1369 * @adapter: board private structure
1370 *
1371 * Configure the Tx /Rx unit of the MAC after a reset.
1372 */
5e5c0964 1373static int atl1c_configure_mac(struct atl1c_adapter *adapter)
43250ddd
JY		 1374{
1375 struct atl1c_hw *hw = &adapter->hw;
1376 u32 master_ctrl_data = 0;
1377 u32 intr_modrt_data;
8f574b35 1378 u32 data;
43250ddd 1379
ebe22ed9
HX		 1380 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1381 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1382 MASTER_CTRL_RX_ITIMER_EN |
1383 MASTER_CTRL_INT_RDCLR);
43250ddd
JY		 1384 /* clear interrupt status */
1385 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1386 /* Clear any WOL status */
1387 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1388 /* set Interrupt Clear Timer
1389 * HW will enable self to assert interrupt event to system after
1390 * waiting x-time for software to notify it accept interrupt.
1391 */
8f574b35
JY		 1392
1393 data = CLK_GATING_EN_ALL;
1394 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1395 if (hw->nic_type == athr_l2c_b)
1396 data &= ~CLK_GATING_RXMAC_EN;
1397 } else
1398 data = 0;
1399 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1400
43250ddd
JY		 1401 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1402 hw->ict & INT_RETRIG_TIMER_MASK);
1403
1404 atl1c_configure_des_ring(adapter);
1405
1406 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1407 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1408 IRQ_MODRT_TX_TIMER_SHIFT;
1409 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1410 IRQ_MODRT_RX_TIMER_SHIFT;
1411 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1412 master_ctrl_data |=
1413 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1414 }
1415
1416 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1417 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1418
8f574b35 1419 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
43250ddd
JY		 1420 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1421
8d5c6836
HX		 1422 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1423 hw->smb_timer & SMB_STAT_TIMER_MASK);
43250ddd 1424
43250ddd
JY		 1425 /* set MTU */
1426 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1427 VLAN_HLEN + ETH_FCS_LEN);
43250ddd
JY		 1428
1429 atl1c_configure_tx(adapter);
1430 atl1c_configure_rx(adapter);
43250ddd
JY		 1431 atl1c_configure_dma(adapter);
1432
1433 return 0;
1434}
1435
5e5c0964
HX		 1436static int atl1c_configure(struct atl1c_adapter *adapter)
1437{
1438 struct net_device *netdev = adapter->netdev;
1439 int num;
1440
1441 atl1c_init_ring_ptrs(adapter);
1442 atl1c_set_multi(netdev);
1443 atl1c_restore_vlan(adapter);
1444
1445 num = atl1c_alloc_rx_buffer(adapter);
1446 if (unlikely(num == 0))
1447 return -ENOMEM;
1448
1449 if (atl1c_configure_mac(adapter))
1450 return -EIO;
1451
1452 return 0;
1453}
1454
43250ddd
JY		 1455static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1456{
1457 u16 hw_reg_addr = 0;
1458 unsigned long *stats_item = NULL;
1459 u32 data;
1460
1461 /* update rx status */
1462 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1463 stats_item = &adapter->hw_stats.rx_ok;
1464 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1465 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1466 *stats_item += data;
1467 stats_item++;
1468 hw_reg_addr += 4;
1469 }
1470/* update tx status */
1471 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1472 stats_item = &adapter->hw_stats.tx_ok;
1473 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1474 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1475 *stats_item += data;
1476 stats_item++;
1477 hw_reg_addr += 4;
1478 }
1479}
1480
49ce9c2c 1481/**
43250ddd
JY		 1482 * atl1c_get_stats - Get System Network Statistics
1483 * @netdev: network interface device structure
1484 *
1485 * Returns the address of the device statistics structure.
1486 * The statistics are actually updated from the timer callback.
1487 */
1488static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1489{
1490 struct atl1c_adapter *adapter = netdev_priv(netdev);
1491 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
a2c483a1 1492 struct net_device_stats *net_stats = &netdev->stats;
43250ddd
JY		 1493
1494 atl1c_update_hw_stats(adapter);
43250ddd
JY		 1495 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1496 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1497 net_stats->multicast = hw_stats->rx_mcast;
1498 net_stats->collisions = hw_stats->tx_1_col +
8560258f
SD		 1499 hw_stats->tx_2_col +
1500 hw_stats->tx_late_col +
1501 hw_stats->tx_abort_col;
1502
1503 net_stats->rx_errors = hw_stats->rx_frag +
1504 hw_stats->rx_fcs_err +
1505 hw_stats->rx_len_err +
1506 hw_stats->rx_sz_ov +
1507 hw_stats->rx_rrd_ov +
1508 hw_stats->rx_align_err +
1509 hw_stats->rx_rxf_ov;
1510
43250ddd
JY		 1511 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1512 net_stats->rx_length_errors = hw_stats->rx_len_err;
1513 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1514 net_stats->rx_frame_errors = hw_stats->rx_align_err;
8560258f 1515 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
43250ddd 1516
8560258f
SD		 1517 net_stats->tx_errors = hw_stats->tx_late_col +
1518 hw_stats->tx_abort_col +
1519 hw_stats->tx_underrun +
1520 hw_stats->tx_trunc;
43250ddd 1521
43250ddd
JY		 1522 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1523 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1524 net_stats->tx_window_errors = hw_stats->tx_late_col;
1525
8560258f
SD		 1526 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1527 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1528
a2c483a1 1529 return net_stats;
43250ddd
JY		 1530}
1531
1532static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1533{
1534 u16 phy_data;
1535
1536 spin_lock(&adapter->mdio_lock);
1537 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1538 spin_unlock(&adapter->mdio_lock);
1539}
1540
1541static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1542 enum atl1c_trans_queue type)
1543{
64699336 1544 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
43250ddd 1545 struct atl1c_buffer *buffer_info;
c6060be4 1546 struct pci_dev *pdev = adapter->pdev;
43250ddd
JY		 1547 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1548 u16 hw_next_to_clean;
0af48336 1549 u16 reg;
47b344b2 1550 unsigned int total_bytes = 0, total_packets = 0;
43250ddd 1551
0af48336 1552 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
43250ddd 1553
0af48336 1554 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
43250ddd
JY		 1555
1556 while (next_to_clean != hw_next_to_clean) {
1557 buffer_info = &tpd_ring->buffer_info[next_to_clean];
47b344b2
RA		 1558 if (buffer_info->skb) {
1559 total_bytes += buffer_info->skb->len;
1560 total_packets++;
1561 }
07641c8f 1562 atl1c_clean_buffer(pdev, buffer_info);
43250ddd
JY		 1563 if (++next_to_clean == tpd_ring->count)
1564 next_to_clean = 0;
1565 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1566 }
1567
47b344b2
RA		 1568 netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1569
43250ddd
JY		 1570 if (netif_queue_stopped(adapter->netdev) &&
1571 netif_carrier_ok(adapter->netdev)) {
1572 netif_wake_queue(adapter->netdev);
1573 }
1574
1575 return true;
1576}
1577
49ce9c2c 1578/**
43250ddd
JY		 1579 * atl1c_intr - Interrupt Handler
1580 * @irq: interrupt number
1581 * @data: pointer to a network interface device structure
43250ddd
JY		 1582 */
1583static irqreturn_t atl1c_intr(int irq, void *data)
1584{
1585 struct net_device *netdev = data;
1586 struct atl1c_adapter *adapter = netdev_priv(netdev);
1587 struct pci_dev *pdev = adapter->pdev;
1588 struct atl1c_hw *hw = &adapter->hw;
1589 int max_ints = AT_MAX_INT_WORK;
1590 int handled = IRQ_NONE;
1591 u32 status;
1592 u32 reg_data;
1593
1594 do {
1595 AT_READ_REG(hw, REG_ISR, &reg_data);
1596 status = reg_data & hw->intr_mask;
1597
1598 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1599 if (max_ints != AT_MAX_INT_WORK)
1600 handled = IRQ_HANDLED;
1601 break;
1602 }
1603 /* link event */
1604 if (status & ISR_GPHY)
1605 atl1c_clear_phy_int(adapter);
1606 /* Ack ISR */
1607 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1608 if (status & ISR_RX_PKT) {
1609 if (likely(napi_schedule_prep(&adapter->napi))) {
1610 hw->intr_mask &= ~ISR_RX_PKT;
1611 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1612 __napi_schedule(&adapter->napi);
1613 }
1614 }
1615 if (status & ISR_TX_PKT)
1616 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1617
1618 handled = IRQ_HANDLED;
1619 /* check if PCIE PHY Link down */
1620 if (status & ISR_ERROR) {
1621 if (netif_msg_hw(adapter))
1622 dev_err(&pdev->dev,
1623 "atl1c hardware error (status = 0x%x)\n",
1624 status & ISR_ERROR);
1625 /* reset MAC */
78315457 1626 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
cb190546 1627 schedule_work(&adapter->common_task);
8f574b35 1628 return IRQ_HANDLED;
43250ddd
JY		 1629 }
1630
1631 if (status & ISR_OVER)
1632 if (netif_msg_intr(adapter))
1633 dev_warn(&pdev->dev,
af901ca1 1634 "TX/RX overflow (status = 0x%x)\n",
43250ddd
JY		 1635 status & ISR_OVER);
1636
1637 /* link event */
1638 if (status & (ISR_GPHY | ISR_MANUAL)) {
a2c483a1 1639 netdev->stats.tx_carrier_errors++;
43250ddd
JY		 1640 atl1c_link_chg_event(adapter);
1641 break;
1642 }
1643
1644 } while (--max_ints > 0);
1645 /* re-enable Interrupt*/
1646 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1647 return handled;
1648}
1649
1650static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1651 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1652{
1653 /*
1654 * The pid field in RRS in not correct sometimes, so we
1655 * cannot figure out if the packet is fragmented or not,
1656 * so we tell the KERNEL CHECKSUM_NONE
1657 */
bc8acf2c 1658 skb_checksum_none_assert(skb);
43250ddd
JY		 1659}
1660
7b701764
ED		 1661static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1662{
1663 struct sk_buff *skb;
1664 struct page *page;
1665
1666 if (adapter->rx_frag_size > PAGE_SIZE)
1667 return netdev_alloc_skb(adapter->netdev,
1668 adapter->rx_buffer_len);
1669
1670 page = adapter->rx_page;
1671 if (!page) {
1672 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1673 if (unlikely(!page))
1674 return NULL;
1675 adapter->rx_page_offset = 0;
1676 }
1677
1678 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1679 adapter->rx_frag_size);
1680 if (likely(skb)) {
1681 adapter->rx_page_offset += adapter->rx_frag_size;
1682 if (adapter->rx_page_offset >= PAGE_SIZE)
1683 adapter->rx_page = NULL;
1684 else
1685 get_page(page);
1686 }
1687 return skb;
1688}
1689
9f1fd0ef 1690static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
43250ddd 1691{
9f1fd0ef 1692 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
43250ddd
JY		 1693 struct pci_dev *pdev = adapter->pdev;
1694 struct atl1c_buffer *buffer_info, *next_info;
1695 struct sk_buff *skb;
1696 void *vir_addr = NULL;
1697 u16 num_alloc = 0;
1698 u16 rfd_next_to_use, next_next;
1699 struct atl1c_rx_free_desc *rfd_desc;
ac574804 1700 dma_addr_t mapping;
43250ddd
JY		 1701
1702 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1703 if (++next_next == rfd_ring->count)
1704 next_next = 0;
1705 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1706 next_info = &rfd_ring->buffer_info[next_next];
1707
c6060be4 1708 while (next_info->flags & ATL1C_BUFFER_FREE) {
43250ddd
JY		 1709 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1710
7b701764 1711 skb = atl1c_alloc_skb(adapter);
43250ddd
JY		 1712 if (unlikely(!skb)) {
1713 if (netif_msg_rx_err(adapter))
1714 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1715 break;
1716 }
1717
1718 /*
1719 * Make buffer alignment 2 beyond a 16 byte boundary
1720 * this will result in a 16 byte aligned IP header after
1721 * the 14 byte MAC header is removed
1722 */
1723 vir_addr = skb->data;
c6060be4 1724 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
43250ddd
JY		 1725 buffer_info->skb = skb;
1726 buffer_info->length = adapter->rx_buffer_len;
ac574804 1727 mapping = pci_map_single(pdev, vir_addr,
43250ddd
JY		 1728 buffer_info->length,
1729 PCI_DMA_FROMDEVICE);
ac574804
HX		 1730 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1731 dev_kfree_skb(skb);
1732 buffer_info->skb = NULL;
1733 buffer_info->length = 0;
1734 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1735 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1736 break;
1737 }
1738 buffer_info->dma = mapping;
4b45e342
JY		 1739 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1740 ATL1C_PCIMAP_FROMDEVICE);
43250ddd
JY		 1741 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1742 rfd_next_to_use = next_next;
1743 if (++next_next == rfd_ring->count)
1744 next_next = 0;
1745 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1746 next_info = &rfd_ring->buffer_info[next_next];
1747 num_alloc++;
1748 }
1749
1750 if (num_alloc) {
1751 /* TODO: update mailbox here */
1752 wmb();
1753 rfd_ring->next_to_use = rfd_next_to_use;
9f1fd0ef 1754 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
43250ddd
JY		 1755 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1756 }
1757
1758 return num_alloc;
1759}
1760
1761static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1762 struct atl1c_recv_ret_status *rrs, u16 num)
1763{
1764 u16 i;
1765 /* the relationship between rrd and rfd is one map one */
1766 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1767 rrd_ring->next_to_clean)) {
1768 rrs->word3 &= ~RRS_RXD_UPDATED;
1769 if (++rrd_ring->next_to_clean == rrd_ring->count)
1770 rrd_ring->next_to_clean = 0;
1771 }
1772}
1773
1774static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1775 struct atl1c_recv_ret_status *rrs, u16 num)
1776{
1777 u16 i;
1778 u16 rfd_index;
1779 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1780
1781 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1782 RRS_RX_RFD_INDEX_MASK;
1783 for (i = 0; i < num; i++) {
1784 buffer_info[rfd_index].skb = NULL;
c6060be4
JY		 1785 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1786 ATL1C_BUFFER_FREE);
43250ddd
JY		 1787 if (++rfd_index == rfd_ring->count)
1788 rfd_index = 0;
1789 }
1790 rfd_ring->next_to_clean = rfd_index;
1791}
1792
9f1fd0ef 1793static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
43250ddd
JY		 1794 int *work_done, int work_to_do)
1795{
1796 u16 rfd_num, rfd_index;
1797 u16 count = 0;
1798 u16 length;
1799 struct pci_dev *pdev = adapter->pdev;
1800 struct net_device *netdev = adapter->netdev;
9f1fd0ef
HX		 1801 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1802 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 1803 struct sk_buff *skb;
1804 struct atl1c_recv_ret_status *rrs;
1805 struct atl1c_buffer *buffer_info;
1806
1807 while (1) {
1808 if (*work_done >= work_to_do)
1809 break;
1810 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1811 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1812 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1813 RRS_RX_RFD_CNT_MASK;
37b76c69 1814 if (unlikely(rfd_num != 1))
43250ddd
JY		 1815 /* TODO support mul rfd*/
1816 if (netif_msg_rx_err(adapter))
1817 dev_warn(&pdev->dev,
1818 "Multi rfd not support yet!\n");
1819 goto rrs_checked;
1820 } else {
1821 break;
1822 }
1823rrs_checked:
1824 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1825 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1826 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1827 if (netif_msg_rx_err(adapter))
1828 dev_warn(&pdev->dev,
1829 "wrong packet! rrs word3 is %x\n",
1830 rrs->word3);
1831 continue;
1832 }
1833
1834 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1835 RRS_PKT_SIZE_MASK);
1836 /* Good Receive */
1837 if (likely(rfd_num == 1)) {
1838 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1839 RRS_RX_RFD_INDEX_MASK;
1840 buffer_info = &rfd_ring->buffer_info[rfd_index];
1841 pci_unmap_single(pdev, buffer_info->dma,
1842 buffer_info->length, PCI_DMA_FROMDEVICE);
1843 skb = buffer_info->skb;
1844 } else {
1845 /* TODO */
1846 if (netif_msg_rx_err(adapter))
1847 dev_warn(&pdev->dev,
1848 "Multi rfd not support yet!\n");
1849 break;
1850 }
1851 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1852 skb_put(skb, length - ETH_FCS_LEN);
1853 skb->protocol = eth_type_trans(skb, netdev);
43250ddd 1854 atl1c_rx_checksum(adapter, skb, rrs);
46facce9 1855 if (rrs->word3 & RRS_VLAN_INS) {
43250ddd
JY		 1856 u16 vlan;
1857
1858 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1859 vlan = le16_to_cpu(vlan);
86a9bad3 1860 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
46facce9
JP		 1861 }
1862 netif_receive_skb(skb);
43250ddd 1863
43250ddd
JY		 1864 (*work_done)++;
1865 count++;
1866 }
1867 if (count)
9f1fd0ef 1868 atl1c_alloc_rx_buffer(adapter);
43250ddd
JY		 1869}
1870
49ce9c2c 1871/**
43250ddd 1872 * atl1c_clean - NAPI Rx polling callback
43250ddd
JY		 1873 */
1874static int atl1c_clean(struct napi_struct *napi, int budget)
1875{
1876 struct atl1c_adapter *adapter =
1877 container_of(napi, struct atl1c_adapter, napi);
1878 int work_done = 0;
1879
1880 /* Keep link state information with original netdev */
1881 if (!netif_carrier_ok(adapter->netdev))
1882 goto quit_polling;
1883 /* just enable one RXQ */
9f1fd0ef 1884 atl1c_clean_rx_irq(adapter, &work_done, budget);
43250ddd
JY		 1885
1886 if (work_done < budget) {
1887quit_polling:
1888 napi_complete(napi);
1889 adapter->hw.intr_mask |= ISR_RX_PKT;
1890 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1891 }
1892 return work_done;
1893}
1894
1895#ifdef CONFIG_NET_POLL_CONTROLLER
1896
1897/*
1898 * Polling 'interrupt' - used by things like netconsole to send skbs
1899 * without having to re-enable interrupts. It's not called while
1900 * the interrupt routine is executing.
1901 */
1902static void atl1c_netpoll(struct net_device *netdev)
1903{
1904 struct atl1c_adapter *adapter = netdev_priv(netdev);
1905
1906 disable_irq(adapter->pdev->irq);
1907 atl1c_intr(adapter->pdev->irq, netdev);
1908 enable_irq(adapter->pdev->irq);
1909}
1910#endif
1911
1912static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1913{
1914 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1915 u16 next_to_use = 0;
1916 u16 next_to_clean = 0;
1917
1918 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1919 next_to_use = tpd_ring->next_to_use;
1920
1921 return (u16)(next_to_clean > next_to_use) ?
1922 (next_to_clean - next_to_use - 1) :
1923 (tpd_ring->count + next_to_clean - next_to_use - 1);
1924}
1925
1926/*
1927 * get next usable tpd
1928 * Note: should call atl1c_tdp_avail to make sure
1929 * there is enough tpd to use
1930 */
1931static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1932 enum atl1c_trans_queue type)
1933{
1934 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1935 struct atl1c_tpd_desc *tpd_desc;
1936 u16 next_to_use = 0;
1937
1938 next_to_use = tpd_ring->next_to_use;
1939 if (++tpd_ring->next_to_use == tpd_ring->count)
1940 tpd_ring->next_to_use = 0;
1941 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1942 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1943 return tpd_desc;
1944}
1945
1946static struct atl1c_buffer *
1947atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1948{
1949 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1950
1951 return &tpd_ring->buffer_info[tpd -
1952 (struct atl1c_tpd_desc *)tpd_ring->desc];
1953}
1954
1955/* Calculate the transmit packet descript needed*/
1956static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1957{
1958 u16 tpd_req;
1959 u16 proto_hdr_len = 0;
1960
1961 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1962
1963 if (skb_is_gso(skb)) {
1964 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1965 if (proto_hdr_len < skb_headlen(skb))
1966 tpd_req++;
1967 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1968 tpd_req++;
1969 }
1970 return tpd_req;
1971}
1972
1973static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1974 struct sk_buff *skb,
1975 struct atl1c_tpd_desc **tpd,
1976 enum atl1c_trans_queue type)
1977{
1978 struct pci_dev *pdev = adapter->pdev;
0f5c113c 1979 unsigned short offload_type;
43250ddd
JY		 1980 u8 hdr_len;
1981 u32 real_len;
43250ddd
JY		 1982
1983 if (skb_is_gso(skb)) {
0f5c113c 1984 int err;
1985
1986 err = skb_cow_head(skb, 0);
1987 if (err < 0)
1988 return err;
1989
43250ddd
JY		 1990 offload_type = skb_shinfo(skb)->gso_type;
1991
1992 if (offload_type & SKB_GSO_TCPV4) {
1993 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1994 + ntohs(ip_hdr(skb)->tot_len));
1995
1996 if (real_len < skb->len)
1997 pskb_trim(skb, real_len);
1998
1999 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2000 if (unlikely(skb->len == hdr_len)) {
2001 /* only xsum need */
2002 if (netif_msg_tx_queued(adapter))
2003 dev_warn(&pdev->dev,
2004 "IPV4 tso with zero data??\n");
2005 goto check_sum;
2006 } else {
2007 ip_hdr(skb)->check = 0;
2008 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2009 ip_hdr(skb)->saddr,
2010 ip_hdr(skb)->daddr,
2011 0, IPPROTO_TCP, 0);
2012 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2013 }
2014 }
2015
2016 if (offload_type & SKB_GSO_TCPV6) {
2017 struct atl1c_tpd_ext_desc *etpd =
2018 *(struct atl1c_tpd_ext_desc **)(tpd);
2019
2020 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2021 *tpd = atl1c_get_tpd(adapter, type);
2022 ipv6_hdr(skb)->payload_len = 0;
2023 /* check payload == 0 byte ? */
2024 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2025 if (unlikely(skb->len == hdr_len)) {
2026 /* only xsum need */
2027 if (netif_msg_tx_queued(adapter))
2028 dev_warn(&pdev->dev,
2029 "IPV6 tso with zero data??\n");
2030 goto check_sum;
2031 } else
2032 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2033 &ipv6_hdr(skb)->saddr,
2034 &ipv6_hdr(skb)->daddr,
2035 0, IPPROTO_TCP, 0);
2036 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2037 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2038 etpd->pkt_len = cpu_to_le32(skb->len);
2039 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2040 }
2041
2042 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2043 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2044 TPD_TCPHDR_OFFSET_SHIFT;
2045 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2046 TPD_MSS_SHIFT;
2047 return 0;
2048 }
2049
2050check_sum:
2051 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2052 u8 css, cso;
0d0b1672 2053 cso = skb_checksum_start_offset(skb);
43250ddd
JY		 2054
2055 if (unlikely(cso & 0x1)) {
2056 if (netif_msg_tx_err(adapter))
2057 dev_err(&adapter->pdev->dev,
2058 "payload offset should not an event number\n");
2059 return -1;
2060 } else {
2061 css = cso + skb->csum_offset;
2062
2063 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2064 TPD_PLOADOFFSET_SHIFT;
2065 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2066 TPD_CCSUM_OFFSET_SHIFT;
2067 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2068 }
2069 }
2070 return 0;
2071}
2072
ac574804
HX		 2073static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2074 struct atl1c_tpd_desc *first_tpd,
2075 enum atl1c_trans_queue type)
2076{
2077 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2078 struct atl1c_buffer *buffer_info;
2079 struct atl1c_tpd_desc *tpd;
2080 u16 first_index, index;
2081
2082 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2083 index = first_index;
2084 while (index != tpd_ring->next_to_use) {
2085 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2086 buffer_info = &tpd_ring->buffer_info[index];
07641c8f 2087 atl1c_clean_buffer(adpt->pdev, buffer_info);
ac574804
HX		 2088 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2089 if (++index == tpd_ring->count)
2090 index = 0;
2091 }
2092 tpd_ring->next_to_use = first_index;
2093}
2094
2095static int atl1c_tx_map(struct atl1c_adapter *adapter,
43250ddd
JY		 2096 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2097 enum atl1c_trans_queue type)
2098{
2099 struct atl1c_tpd_desc *use_tpd = NULL;
2100 struct atl1c_buffer *buffer_info = NULL;
2101 u16 buf_len = skb_headlen(skb);
2102 u16 map_len = 0;
2103 u16 mapped_len = 0;
2104 u16 hdr_len = 0;
2105 u16 nr_frags;
2106 u16 f;
2107 int tso;
2108
2109 nr_frags = skb_shinfo(skb)->nr_frags;
2110 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2111 if (tso) {
2112 /* TSO */
2113 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2114 use_tpd = tpd;
2115
2116 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2117 buffer_info->length = map_len;
2118 buffer_info->dma = pci_map_single(adapter->pdev,
2119 skb->data, hdr_len, PCI_DMA_TODEVICE);
ac574804
HX		 2120 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2121 buffer_info->dma)))
2122 goto err_dma;
7cb08d7f 2123 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
4b45e342
JY		 2124 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2125 ATL1C_PCIMAP_TODEVICE);
43250ddd
JY		 2126 mapped_len += map_len;
2127 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2128 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2129 }
2130
2131 if (mapped_len < buf_len) {
2132 /* mapped_len == 0, means we should use the first tpd,
2133 which is given by caller */
2134 if (mapped_len == 0)
2135 use_tpd = tpd;
2136 else {
2137 use_tpd = atl1c_get_tpd(adapter, type);
43250ddd
JY		 2138 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2139 }
2140 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2141 buffer_info->length = buf_len - mapped_len;
2142 buffer_info->dma =
2143 pci_map_single(adapter->pdev, skb->data + mapped_len,
2144 buffer_info->length, PCI_DMA_TODEVICE);
ac574804
HX		 2145 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2146 buffer_info->dma)))
2147 goto err_dma;
2148
c6060be4 2149 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
4b45e342
JY		 2150 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2151 ATL1C_PCIMAP_TODEVICE);
43250ddd
JY		 2152 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2153 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2154 }
2155
2156 for (f = 0; f < nr_frags; f++) {
2157 struct skb_frag_struct *frag;
2158
2159 frag = &skb_shinfo(skb)->frags[f];
2160
2161 use_tpd = atl1c_get_tpd(adapter, type);
2162 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2163
2164 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
9e903e08 2165 buffer_info->length = skb_frag_size(frag);
8d1bb865
IC		 2166 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2167 frag, 0,
2168 buffer_info->length,
5d6bcdfe 2169 DMA_TO_DEVICE);
ac574804
HX		 2170 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2171 goto err_dma;
2172
c6060be4 2173 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
4b45e342
JY		 2174 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2175 ATL1C_PCIMAP_TODEVICE);
43250ddd
JY		 2176 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2177 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2178 }
2179
2180 /* The last tpd */
2181 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2182 /* The last buffer info contain the skb address,
2183 so it will be free after unmap */
2184 buffer_info->skb = skb;
ac574804
HX		 2185
2186 return 0;
2187
2188err_dma:
2189 buffer_info->dma = 0;
2190 buffer_info->length = 0;
2191 return -1;
43250ddd
JY		 2192}
2193
2194static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2195 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2196{
2197 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
0af48336 2198 u16 reg;
43250ddd 2199
0af48336
HX		 2200 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2201 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
43250ddd
JY		 2202}
2203
61357325
SH		 2204static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2205 struct net_device *netdev)
43250ddd
JY		 2206{
2207 struct atl1c_adapter *adapter = netdev_priv(netdev);
43250ddd
JY		 2208 u16 tpd_req = 1;
2209 struct atl1c_tpd_desc *tpd;
2210 enum atl1c_trans_queue type = atl1c_trans_normal;
2211
2212 if (test_bit(__AT_DOWN, &adapter->flags)) {
2213 dev_kfree_skb_any(skb);
2214 return NETDEV_TX_OK;
2215 }
2216
2217 tpd_req = atl1c_cal_tpd_req(skb);
43250ddd
JY		 2218
2219 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2220 /* no enough descriptor, just stop queue */
2221 netif_stop_queue(netdev);
43250ddd
JY		 2222 return NETDEV_TX_BUSY;
2223 }
2224
2225 tpd = atl1c_get_tpd(adapter, type);
2226
2227 /* do TSO and check sum */
2228 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
43250ddd
JY		 2229 dev_kfree_skb_any(skb);
2230 return NETDEV_TX_OK;
2231 }
2232
df8a39de
JP		 2233 if (unlikely(skb_vlan_tag_present(skb))) {
2234 u16 vlan = skb_vlan_tag_get(skb);
43250ddd
JY		 2235 __le16 tag;
2236
2237 vlan = cpu_to_le16(vlan);
2238 AT_VLAN_TO_TAG(vlan, tag);
2239 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2240 tpd->vlan_tag = tag;
2241 }
2242
2243 if (skb_network_offset(skb) != ETH_HLEN)
2244 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2245
ac574804
HX		 2246 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2247 netif_info(adapter, tx_done, adapter->netdev,
2248 "tx-skb droppted due to dma error\n");
2249 /* roll back tpd/buffer */
2250 atl1c_tx_rollback(adapter, tpd, type);
07641c8f 2251 dev_kfree_skb_any(skb);
ac574804 2252 } else {
47b344b2 2253 netdev_sent_queue(adapter->netdev, skb->len);
ac574804 2254 atl1c_tx_queue(adapter, skb, tpd, type);
ac574804 2255 }
43250ddd 2256
43250ddd
JY		 2257 return NETDEV_TX_OK;
2258}
2259
2260static void atl1c_free_irq(struct atl1c_adapter *adapter)
2261{
2262 struct net_device *netdev = adapter->netdev;
2263
2264 free_irq(adapter->pdev->irq, netdev);
2265
2266 if (adapter->have_msi)
2267 pci_disable_msi(adapter->pdev);
2268}
2269
2270static int atl1c_request_irq(struct atl1c_adapter *adapter)
2271{
2272 struct pci_dev *pdev = adapter->pdev;
2273 struct net_device *netdev = adapter->netdev;
2274 int flags = 0;
2275 int err = 0;
2276
2277 adapter->have_msi = true;
2278 err = pci_enable_msi(adapter->pdev);
2279 if (err) {
2280 if (netif_msg_ifup(adapter))
2281 dev_err(&pdev->dev,
2282 "Unable to allocate MSI interrupt Error: %d\n",
2283 err);
2284 adapter->have_msi = false;
93f7fab4 2285 }
43250ddd
JY		 2286
2287 if (!adapter->have_msi)
2288 flags |= IRQF_SHARED;
9aff7e92 2289 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
43250ddd
JY		 2290 netdev->name, netdev);
2291 if (err) {
2292 if (netif_msg_ifup(adapter))
2293 dev_err(&pdev->dev,
2294 "Unable to allocate interrupt Error: %d\n",
2295 err);
2296 if (adapter->have_msi)
2297 pci_disable_msi(adapter->pdev);
2298 return err;
2299 }
2300 if (netif_msg_ifup(adapter))
2301 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2302 return err;
2303}
2304
5e5c0964
HX		 2305
2306static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2307{
2308 /* release tx-pending skbs and reset tx/rx ring index */
2309 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2310 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2311 atl1c_clean_rx_ring(adapter);
2312}
2313
0fb1e54e 2314static int atl1c_up(struct atl1c_adapter *adapter)
43250ddd
JY		 2315{
2316 struct net_device *netdev = adapter->netdev;
43250ddd 2317 int err;
43250ddd
JY		 2318
2319 netif_carrier_off(netdev);
43250ddd 2320
5e5c0964
HX		 2321 err = atl1c_configure(adapter);
2322 if (unlikely(err))
43250ddd 2323 goto err_up;
43250ddd
JY		 2324
2325 err = atl1c_request_irq(adapter);
2326 if (unlikely(err))
2327 goto err_up;
2328
5e5c0964 2329 atl1c_check_link_status(adapter);
43250ddd
JY		 2330 clear_bit(__AT_DOWN, &adapter->flags);
2331 napi_enable(&adapter->napi);
2332 atl1c_irq_enable(adapter);
43250ddd
JY		 2333 netif_start_queue(netdev);
2334 return err;
2335
2336err_up:
43250ddd
JY		 2337 atl1c_clean_rx_ring(adapter);
2338 return err;
2339}
2340
0fb1e54e 2341static void atl1c_down(struct atl1c_adapter *adapter)
43250ddd
JY		 2342{
2343 struct net_device *netdev = adapter->netdev;
2344
2345 atl1c_del_timer(adapter);
cb190546 2346 adapter->work_event = 0; /* clear all event */
43250ddd
JY		 2347 /* signal that we're down so the interrupt handler does not
2348 * reschedule our watchdog timer */
2349 set_bit(__AT_DOWN, &adapter->flags);
2350 netif_carrier_off(netdev);
2351 napi_disable(&adapter->napi);
2352 atl1c_irq_disable(adapter);
2353 atl1c_free_irq(adapter);
024e1e4d
HX		 2354 /* disable ASPM if device inactive */
2355 atl1c_disable_l0s_l1(&adapter->hw);
43250ddd
JY		 2356 /* reset MAC to disable all RX/TX */
2357 atl1c_reset_mac(&adapter->hw);
2358 msleep(1);
2359
2360 adapter->link_speed = SPEED_0;
2361 adapter->link_duplex = -1;
5e5c0964 2362 atl1c_reset_dma_ring(adapter);
43250ddd
JY		 2363}
2364
49ce9c2c 2365/**
43250ddd
JY		 2366 * atl1c_open - Called when a network interface is made active
2367 * @netdev: network interface device structure
2368 *
2369 * Returns 0 on success, negative value on failure
2370 *
2371 * The open entry point is called when a network interface is made
2372 * active by the system (IFF_UP). At this point all resources needed
2373 * for transmit and receive operations are allocated, the interrupt
2374 * handler is registered with the OS, the watchdog timer is started,
2375 * and the stack is notified that the interface is ready.
2376 */
2377static int atl1c_open(struct net_device *netdev)
2378{
2379 struct atl1c_adapter *adapter = netdev_priv(netdev);
2380 int err;
2381
2382 /* disallow open during test */
2383 if (test_bit(__AT_TESTING, &adapter->flags))
2384 return -EBUSY;
2385
2386 /* allocate rx/tx dma buffer & descriptors */
2387 err = atl1c_setup_ring_resources(adapter);
2388 if (unlikely(err))
2389 return err;
2390
2391 err = atl1c_up(adapter);
2392 if (unlikely(err))
2393 goto err_up;
2394
43250ddd
JY		 2395 return 0;
2396
2397err_up:
2398 atl1c_free_irq(adapter);
2399 atl1c_free_ring_resources(adapter);
2400 atl1c_reset_mac(&adapter->hw);
2401 return err;
2402}
2403
49ce9c2c 2404/**
43250ddd
JY		 2405 * atl1c_close - Disables a network interface
2406 * @netdev: network interface device structure
2407 *
2408 * Returns 0, this is not allowed to fail
2409 *
2410 * The close entry point is called when an interface is de-activated
2411 * by the OS. The hardware is still under the drivers control, but
2412 * needs to be disabled. A global MAC reset is issued to stop the
2413 * hardware, and all transmit and receive resources are freed.
2414 */
2415static int atl1c_close(struct net_device *netdev)
2416{
2417 struct atl1c_adapter *adapter = netdev_priv(netdev);
2418
2419 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
0aa76ce3
HX		 2420 set_bit(__AT_DOWN, &adapter->flags);
2421 cancel_work_sync(&adapter->common_task);
43250ddd
JY		 2422 atl1c_down(adapter);
2423 atl1c_free_ring_resources(adapter);
2424 return 0;
2425}
2426
762e3023 2427static int atl1c_suspend(struct device *dev)
43250ddd 2428{
762e3023 2429 struct pci_dev *pdev = to_pci_dev(dev);
43250ddd
JY		 2430 struct net_device *netdev = pci_get_drvdata(pdev);
2431 struct atl1c_adapter *adapter = netdev_priv(netdev);
2432 struct atl1c_hw *hw = &adapter->hw;
43250ddd 2433 u32 wufc = adapter->wol;
43250ddd 2434
8f574b35 2435 atl1c_disable_l0s_l1(hw);
43250ddd
JY		 2436 if (netif_running(netdev)) {
2437 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2438 atl1c_down(adapter);
2439 }
2440 netif_device_detach(netdev);
8f574b35
JY		 2441
2442 if (wufc)
319d013a 2443 if (atl1c_phy_to_ps_link(hw) != 0)
8f574b35
JY		 2444 dev_dbg(&pdev->dev, "phy power saving failed");
2445
319d013a 2446 atl1c_power_saving(hw, wufc);
ce5b972b 2447
43250ddd
JY		 2448 return 0;
2449}
2450
d187c1aa 2451#ifdef CONFIG_PM_SLEEP
762e3023 2452static int atl1c_resume(struct device *dev)
43250ddd 2453{
762e3023 2454 struct pci_dev *pdev = to_pci_dev(dev);
43250ddd
JY		 2455 struct net_device *netdev = pci_get_drvdata(pdev);
2456 struct atl1c_adapter *adapter = netdev_priv(netdev);
2457
43250ddd 2458 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
ce3ba0c9 2459 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
43250ddd
JY		 2460
2461 atl1c_phy_reset(&adapter->hw);
2462 atl1c_reset_mac(&adapter->hw);
8f574b35
JY		 2463 atl1c_phy_init(&adapter->hw);
2464
2465#if 0
2466 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2467 pm_data &= ~PM_CTRLSTAT_PME_EN;
2468 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2469#endif
2470
43250ddd
JY		 2471 netif_device_attach(netdev);
2472 if (netif_running(netdev))
2473 atl1c_up(adapter);
2474
2475 return 0;
2476}
d187c1aa 2477#endif
43250ddd
JY		 2478
2479static void atl1c_shutdown(struct pci_dev *pdev)
2480{
762e3023
RW		 2481 struct net_device *netdev = pci_get_drvdata(pdev);
2482 struct atl1c_adapter *adapter = netdev_priv(netdev);
2483
2484 atl1c_suspend(&pdev->dev);
2485 pci_wake_from_d3(pdev, adapter->wol);
2486 pci_set_power_state(pdev, PCI_D3hot);
43250ddd
JY		 2487}
2488
2489static const struct net_device_ops atl1c_netdev_ops = {
2490 .ndo_open = atl1c_open,
2491 .ndo_stop = atl1c_close,
2492 .ndo_validate_addr = eth_validate_addr,
2493 .ndo_start_xmit = atl1c_xmit_frame,
46facce9 2494 .ndo_set_mac_address = atl1c_set_mac_addr,
afc4b13d 2495 .ndo_set_rx_mode = atl1c_set_multi,
43250ddd 2496 .ndo_change_mtu = atl1c_change_mtu,
782d640a 2497 .ndo_fix_features = atl1c_fix_features,
46facce9 2498 .ndo_set_features = atl1c_set_features,
43250ddd
JY		 2499 .ndo_do_ioctl = atl1c_ioctl,
2500 .ndo_tx_timeout = atl1c_tx_timeout,
2501 .ndo_get_stats = atl1c_get_stats,
43250ddd
JY		 2502#ifdef CONFIG_NET_POLL_CONTROLLER
2503 .ndo_poll_controller = atl1c_netpoll,
2504#endif
2505};
2506
2507static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2508{
2509 SET_NETDEV_DEV(netdev, &pdev->dev);
2510 pci_set_drvdata(pdev, netdev);
2511
43250ddd
JY		 2512 netdev->netdev_ops = &atl1c_netdev_ops;
2513 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2514 atl1c_set_ethtool_ops(netdev);
2515
2516 /* TODO: add when ready */
f646968f
PM		 2517 netdev->hw_features = NETIF_F_SG |
2518 NETIF_F_HW_CSUM |
2519 NETIF_F_HW_VLAN_CTAG_RX |
2520 NETIF_F_TSO |
43250ddd 2521 NETIF_F_TSO6;
f646968f
PM		 2522 netdev->features = netdev->hw_features |
2523 NETIF_F_HW_VLAN_CTAG_TX;
43250ddd
JY		 2524 return 0;
2525}
2526
49ce9c2c 2527/**
43250ddd
JY		 2528 * atl1c_probe - Device Initialization Routine
2529 * @pdev: PCI device information struct
2530 * @ent: entry in atl1c_pci_tbl
2531 *
2532 * Returns 0 on success, negative on failure
2533 *
2534 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2535 * The OS initialization, configuring of the adapter private structure,
2536 * and a hardware reset occur.
2537 */
1dd06ae8 2538static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
43250ddd
JY		 2539{
2540 struct net_device *netdev;
2541 struct atl1c_adapter *adapter;
2542 static int cards_found;
2543
2544 int err = 0;
2545
2546 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2547 err = pci_enable_device_mem(pdev);
2548 if (err) {
2549 dev_err(&pdev->dev, "cannot enable PCI device\n");
2550 return err;
2551 }
2552
2553 /*
2554 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2555 * shared register for the high 32 bits, so only a single, aligned,
2556 * 4 GB physical address range can be used at a time.
2557 *
2558 * Supporting 64-bit DMA on this hardware is more trouble than it's
2559 * worth. It is far easier to limit to 32-bit DMA than update
2560 * various kernel subsystems to support the mechanics required by a
2561 * fixed-high-32-bit system.
2562 */
e930438c
YH		 2563 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2564 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
43250ddd
JY		 2565 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2566 goto err_dma;
2567 }
2568
2569 err = pci_request_regions(pdev, atl1c_driver_name);
2570 if (err) {
2571 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2572 goto err_pci_reg;
2573 }
2574
2575 pci_set_master(pdev);
2576
2577 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2578 if (netdev == NULL) {
2579 err = -ENOMEM;
43250ddd
JY		 2580 goto err_alloc_etherdev;
2581 }
2582
2583 err = atl1c_init_netdev(netdev, pdev);
2584 if (err) {
2585 dev_err(&pdev->dev, "init netdevice failed\n");
2586 goto err_init_netdev;
2587 }
2588 adapter = netdev_priv(netdev);
2589 adapter->bd_number = cards_found;
2590 adapter->netdev = netdev;
2591 adapter->pdev = pdev;
2592 adapter->hw.adapter = adapter;
2593 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2594 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2595 if (!adapter->hw.hw_addr) {
2596 err = -EIO;
2597 dev_err(&pdev->dev, "cannot map device registers\n");
2598 goto err_ioremap;
2599 }
43250ddd
JY		 2600
2601 /* init mii data */
2602 adapter->mii.dev = netdev;
2603 adapter->mii.mdio_read = atl1c_mdio_read;
2604 adapter->mii.mdio_write = atl1c_mdio_write;
2605 adapter->mii.phy_id_mask = 0x1f;
929a5e93 2606 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
43250ddd
JY		 2607 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2608 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2609 (unsigned long)adapter);
2610 /* setup the private structure */
2611 err = atl1c_sw_init(adapter);
2612 if (err) {
2613 dev_err(&pdev->dev, "net device private data init failed\n");
2614 goto err_sw_init;
2615 }
ce3ba0c9 2616 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
43250ddd
JY		 2617
2618 /* Init GPHY as early as possible due to power saving issue */
2619 atl1c_phy_reset(&adapter->hw);
2620
2621 err = atl1c_reset_mac(&adapter->hw);
2622 if (err) {
2623 err = -EIO;
2624 goto err_reset;
2625 }
2626
43250ddd
JY		 2627 /* reset the controller to
2628 * put the device in a known good starting state */
2629 err = atl1c_phy_init(&adapter->hw);
2630 if (err) {
2631 err = -EIO;
2632 goto err_reset;
2633 }
6a214fd4
DK		 2634 if (atl1c_read_mac_addr(&adapter->hw)) {
2635 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
e41b2d7f 2636 netdev->addr_assign_type = NET_ADDR_RANDOM;
43250ddd
JY		 2637 }
2638 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
43250ddd 2639 if (netif_msg_probe(adapter))
82991172 2640 dev_dbg(&pdev->dev, "mac address : %pM\n",
2641 adapter->hw.mac_addr);
43250ddd 2642
229e6b6e 2643 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
cb190546
JY		 2644 INIT_WORK(&adapter->common_task, atl1c_common_task);
2645 adapter->work_event = 0;
43250ddd
JY		 2646 err = register_netdev(netdev);
2647 if (err) {
2648 dev_err(&pdev->dev, "register netdevice failed\n");
2649 goto err_register;
2650 }
2651
2652 if (netif_msg_probe(adapter))
2653 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2654 cards_found++;
2655 return 0;
2656
2657err_reset:
2658err_register:
2659err_sw_init:
43250ddd
JY		 2660 iounmap(adapter->hw.hw_addr);
2661err_init_netdev:
2662err_ioremap:
2663 free_netdev(netdev);
2664err_alloc_etherdev:
2665 pci_release_regions(pdev);
2666err_pci_reg:
2667err_dma:
2668 pci_disable_device(pdev);
2669 return err;
2670}
2671
49ce9c2c 2672/**
43250ddd
JY		 2673 * atl1c_remove - Device Removal Routine
2674 * @pdev: PCI device information struct
2675 *
2676 * atl1c_remove is called by the PCI subsystem to alert the driver
2677 * that it should release a PCI device. The could be caused by a
2678 * Hot-Plug event, or because the driver is going to be removed from
2679 * memory.
2680 */
093d369d 2681static void atl1c_remove(struct pci_dev *pdev)
43250ddd
JY		 2682{
2683 struct net_device *netdev = pci_get_drvdata(pdev);
2684 struct atl1c_adapter *adapter = netdev_priv(netdev);
2685
2686 unregister_netdev(netdev);
229e6b6e
HX		 2687 /* restore permanent address */
2688 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
43250ddd
JY		 2689 atl1c_phy_disable(&adapter->hw);
2690
2691 iounmap(adapter->hw.hw_addr);
2692
2693 pci_release_regions(pdev);
2694 pci_disable_device(pdev);
2695 free_netdev(netdev);
2696}
2697
49ce9c2c 2698/**
43250ddd
JY		 2699 * atl1c_io_error_detected - called when PCI error is detected
2700 * @pdev: Pointer to PCI device
2701 * @state: The current pci connection state
2702 *
2703 * This function is called after a PCI bus error affecting
2704 * this device has been detected.
2705 */
2706static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2707 pci_channel_state_t state)
2708{
2709 struct net_device *netdev = pci_get_drvdata(pdev);
2710 struct atl1c_adapter *adapter = netdev_priv(netdev);
2711
2712 netif_device_detach(netdev);
2713
005fb4f0
DN		 2714 if (state == pci_channel_io_perm_failure)
2715 return PCI_ERS_RESULT_DISCONNECT;
2716
43250ddd
JY		 2717 if (netif_running(netdev))
2718 atl1c_down(adapter);
2719
2720 pci_disable_device(pdev);
2721
2722 /* Request a slot slot reset. */
2723 return PCI_ERS_RESULT_NEED_RESET;
2724}
2725
49ce9c2c 2726/**
43250ddd
JY		 2727 * atl1c_io_slot_reset - called after the pci bus has been reset.
2728 * @pdev: Pointer to PCI device
2729 *
2730 * Restart the card from scratch, as if from a cold-boot. Implementation
2731 * resembles the first-half of the e1000_resume routine.
2732 */
2733static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2734{
2735 struct net_device *netdev = pci_get_drvdata(pdev);
2736 struct atl1c_adapter *adapter = netdev_priv(netdev);
2737
2738 if (pci_enable_device(pdev)) {
2739 if (netif_msg_hw(adapter))
2740 dev_err(&pdev->dev,
2741 "Cannot re-enable PCI device after reset\n");
2742 return PCI_ERS_RESULT_DISCONNECT;
2743 }
2744 pci_set_master(pdev);
2745
2746 pci_enable_wake(pdev, PCI_D3hot, 0);
2747 pci_enable_wake(pdev, PCI_D3cold, 0);
2748
2749 atl1c_reset_mac(&adapter->hw);
2750
2751 return PCI_ERS_RESULT_RECOVERED;
2752}
2753
49ce9c2c 2754/**
43250ddd
JY		 2755 * atl1c_io_resume - called when traffic can start flowing again.
2756 * @pdev: Pointer to PCI device
2757 *
2758 * This callback is called when the error recovery driver tells us that
2759 * its OK to resume normal operation. Implementation resembles the
2760 * second-half of the atl1c_resume routine.
2761 */
2762static void atl1c_io_resume(struct pci_dev *pdev)
2763{
2764 struct net_device *netdev = pci_get_drvdata(pdev);
2765 struct atl1c_adapter *adapter = netdev_priv(netdev);
2766
2767 if (netif_running(netdev)) {
2768 if (atl1c_up(adapter)) {
2769 if (netif_msg_hw(adapter))
2770 dev_err(&pdev->dev,
2771 "Cannot bring device back up after reset\n");
2772 return;
2773 }
2774 }
2775
2776 netif_device_attach(netdev);
2777}
2778
3646f0e5 2779static const struct pci_error_handlers atl1c_err_handler = {
43250ddd
JY		 2780 .error_detected = atl1c_io_error_detected,
2781 .slot_reset = atl1c_io_slot_reset,
2782 .resume = atl1c_io_resume,
2783};
2784
762e3023
RW		 2785static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2786
43250ddd
JY		 2787static struct pci_driver atl1c_driver = {
2788 .name = atl1c_driver_name,
2789 .id_table = atl1c_pci_tbl,
2790 .probe = atl1c_probe,
093d369d 2791 .remove = atl1c_remove,
43250ddd 2792 .shutdown = atl1c_shutdown,
762e3023
RW		 2793 .err_handler = &atl1c_err_handler,
2794 .driver.pm = &atl1c_pm_ops,
43250ddd
JY		 2795};
2796
2c21d6c9 2797module_pci_driver(atl1c_driver);
Linux kernel - Deliverables
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