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Merge branch 'for-davem' into for-next
[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
JY		 67
68static const u16 atl1c_pay_load_size[] = {
69 128, 256, 512, 1024, 2048, 4096,
70};
71
43250ddd
JY		 72
73static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
74 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
8f574b35
JY		 75static void atl1c_pcie_patch(struct atl1c_hw *hw)
76{
5cbdcc2f
HX		 77 u32 mst_data, data;
78
79 /* pclk sel could switch to 25M */
80 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
81 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
82 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
43250ddd 83
ebe22ed9
HX		 84 /* WoL/PCIE related settings */
85 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
86 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
87 data |= PCIE_PHYMISC_FORCE_RCV_DET;
88 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
89 } else { /* new dev set bit5 of MASTER */
90 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
91 AT_WRITE_REG(hw, REG_MASTER_CTRL,
92 mst_data | MASTER_CTRL_WAKEN_25M);
93 }
94 /* aspm/PCIE setting only for l2cb 1.0 */
8f574b35
JY		 95 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
96 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
ebe22ed9
HX		 97 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
98 L2CB1_PCIE_PHYMISC2_CDR_BW);
99 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
100 L2CB1_PCIE_PHYMISC2_L0S_TH);
8f574b35 101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
ebe22ed9
HX		 102 /* extend L1 sync timer */
103 AT_READ_REG(hw, REG_LINK_CTRL, &data);
104 data |= LINK_CTRL_EXT_SYNC;
105 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
106 }
107 /* l2cb 1.x & l1d 1.x */
108 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
109 AT_READ_REG(hw, REG_PM_CTRL, &data);
110 data |= PM_CTRL_L0S_BUFSRX_EN;
111 AT_WRITE_REG(hw, REG_PM_CTRL, data);
112 /* clear vendor msg */
113 AT_READ_REG(hw, REG_DMA_DBG, &data);
114 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
8f574b35
JY		 115 }
116}
117
118/* FIXME: no need any more ? */
43250ddd
JY		 119/*
120 * atl1c_init_pcie - init PCIE module
121 */
122static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
123{
124 u32 data;
125 u32 pci_cmd;
126 struct pci_dev *pdev = hw->adapter->pdev;
95f9aea7 127 int pos;
43250ddd
JY		 128
129 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
130 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
131 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
132 PCI_COMMAND_IO);
133 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
134
135 /*
136 * Clear any PowerSaveing Settings
137 */
138 pci_enable_wake(pdev, PCI_D3hot, 0);
139 pci_enable_wake(pdev, PCI_D3cold, 0);
87eabe6b
HX		 140 /* wol sts read-clear */
141 AT_READ_REG(hw, REG_WOL_CTRL, &data);
142 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
43250ddd
JY		 143
144 /*
145 * Mask some pcie error bits
146 */
95f9aea7 147 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
a4f63634
BD		 148 if (pos) {
149 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
150 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
151 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
152 }
95f9aea7 153 /* clear error status */
eb0ff563 154 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
95f9aea7
HX		 155 PCI_EXP_DEVSTA_NFED |
156 PCI_EXP_DEVSTA_FED |
157 PCI_EXP_DEVSTA_CED |
158 PCI_EXP_DEVSTA_URD);
43250ddd 159
8f574b35
JY		 160 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
161 data &= ~LTSSM_ID_EN_WRO;
162 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
163
164 atl1c_pcie_patch(hw);
43250ddd
JY		 165 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
166 atl1c_disable_l0s_l1(hw);
43250ddd 167
8f574b35 168 msleep(5);
43250ddd
JY		 169}
170
49ce9c2c 171/**
43250ddd
JY		 172 * atl1c_irq_enable - Enable default interrupt generation settings
173 * @adapter: board private structure
174 */
175static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
176{
177 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
178 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
179 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
180 AT_WRITE_FLUSH(&adapter->hw);
181 }
182}
183
49ce9c2c 184/**
43250ddd
JY		 185 * atl1c_irq_disable - Mask off interrupt generation on the NIC
186 * @adapter: board private structure
187 */
188static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
189{
190 atomic_inc(&adapter->irq_sem);
191 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
8f574b35 192 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
43250ddd
JY		 193 AT_WRITE_FLUSH(&adapter->hw);
194 synchronize_irq(adapter->pdev->irq);
195}
196
49ce9c2c 197/**
43250ddd
JY		 198 * atl1c_irq_reset - reset interrupt confiure on the NIC
199 * @adapter: board private structure
200 */
201static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
202{
203 atomic_set(&adapter->irq_sem, 1);
204 atl1c_irq_enable(adapter);
205}
206
c930a662
JP		 207/*
208 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
209 * of the idle status register until the device is actually idle
210 */
969a7ee2 211static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
c930a662
JP		 212{
213 int timeout;
214 u32 data;
215
216 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
217 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
969a7ee2 218 if ((data & modu_ctrl) == 0)
c930a662
JP		 219 return 0;
220 msleep(1);
221 }
222 return data;
223}
224
49ce9c2c 225/**
43250ddd
JY		 226 * atl1c_phy_config - Timer Call-back
227 * @data: pointer to netdev cast into an unsigned long
228 */
229static void atl1c_phy_config(unsigned long data)
230{
231 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
232 struct atl1c_hw *hw = &adapter->hw;
233 unsigned long flags;
234
235 spin_lock_irqsave(&adapter->mdio_lock, flags);
236 atl1c_restart_autoneg(hw);
237 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
238}
239
240void atl1c_reinit_locked(struct atl1c_adapter *adapter)
241{
43250ddd
JY		 242 WARN_ON(in_interrupt());
243 atl1c_down(adapter);
244 atl1c_up(adapter);
245 clear_bit(__AT_RESETTING, &adapter->flags);
246}
247
43250ddd
JY		 248static void atl1c_check_link_status(struct atl1c_adapter *adapter)
249{
250 struct atl1c_hw *hw = &adapter->hw;
251 struct net_device *netdev = adapter->netdev;
252 struct pci_dev *pdev = adapter->pdev;
253 int err;
254 unsigned long flags;
255 u16 speed, duplex, phy_data;
256
257 spin_lock_irqsave(&adapter->mdio_lock, flags);
258 /* MII_BMSR must read twise */
259 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
260 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
261 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
262
263 if ((phy_data & BMSR_LSTATUS) == 0) {
264 /* link down */
5e5c0964 265 netif_carrier_off(netdev);
8f574b35 266 hw->hibernate = true;
5e5c0964 267 if (atl1c_reset_mac(hw) != 0)
8f574b35 268 if (netif_msg_hw(adapter))
5e5c0964 269 dev_warn(&pdev->dev, "reset mac failed\n");
024e1e4d 270 atl1c_set_aspm(hw, SPEED_0);
903d7ce0 271 atl1c_post_phy_linkchg(hw, SPEED_0);
5e5c0964
HX		 272 atl1c_reset_dma_ring(adapter);
273 atl1c_configure(adapter);
43250ddd
JY		 274 } else {
275 /* Link Up */
276 hw->hibernate = false;
277 spin_lock_irqsave(&adapter->mdio_lock, flags);
278 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
279 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
280 if (unlikely(err))
281 return;
282 /* link result is our setting */
283 if (adapter->link_speed != speed ||
284 adapter->link_duplex != duplex) {
285 adapter->link_speed = speed;
286 adapter->link_duplex = duplex;
024e1e4d 287 atl1c_set_aspm(hw, speed);
903d7ce0 288 atl1c_post_phy_linkchg(hw, speed);
25456e5c 289 atl1c_start_mac(adapter);
43250ddd
JY		 290 if (netif_msg_link(adapter))
291 dev_info(&pdev->dev,
292 "%s: %s NIC Link is Up<%d Mbps %s>\n",
293 atl1c_driver_name, netdev->name,
294 adapter->link_speed,
295 adapter->link_duplex == FULL_DUPLEX ?
296 "Full Duplex" : "Half Duplex");
297 }
298 if (!netif_carrier_ok(netdev))
299 netif_carrier_on(netdev);
300 }
301}
302
43250ddd
JY		 303static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
304{
305 struct net_device *netdev = adapter->netdev;
306 struct pci_dev *pdev = adapter->pdev;
307 u16 phy_data;
308 u16 link_up;
309
310 spin_lock(&adapter->mdio_lock);
311 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
312 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
313 spin_unlock(&adapter->mdio_lock);
314 link_up = phy_data & BMSR_LSTATUS;
315 /* notify upper layer link down ASAP */
316 if (!link_up) {
317 if (netif_carrier_ok(netdev)) {
318 /* old link state: Up */
319 netif_carrier_off(netdev);
320 if (netif_msg_link(adapter))
321 dev_info(&pdev->dev,
322 "%s: %s NIC Link is Down\n",
323 atl1c_driver_name, netdev->name);
324 adapter->link_speed = SPEED_0;
325 }
326 }
cb190546 327
cb771838 328 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
cb190546 329 schedule_work(&adapter->common_task);
43250ddd
JY		 330}
331
cb190546 332static void atl1c_common_task(struct work_struct *work)
43250ddd 333{
cb190546
JY		 334 struct atl1c_adapter *adapter;
335 struct net_device *netdev;
336
337 adapter = container_of(work, struct atl1c_adapter, common_task);
338 netdev = adapter->netdev;
339
0aa76ce3
HX		 340 if (test_bit(__AT_DOWN, &adapter->flags))
341 return;
342
cb771838 343 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
cb190546
JY		 344 netif_device_detach(netdev);
345 atl1c_down(adapter);
346 atl1c_up(adapter);
347 netif_device_attach(netdev);
cb190546
JY		 348 }
349
cb771838 350 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
5e5c0964
HX		 351 &adapter->work_event)) {
352 atl1c_irq_disable(adapter);
cb190546 353 atl1c_check_link_status(adapter);
5e5c0964
HX		 354 atl1c_irq_enable(adapter);
355 }
43250ddd
JY		 356}
357
cb190546
JY		 358
359static void atl1c_del_timer(struct atl1c_adapter *adapter)
43250ddd 360{
cb190546 361 del_timer_sync(&adapter->phy_config_timer);
43250ddd
JY		 362}
363
cb190546 364
49ce9c2c 365/**
43250ddd
JY		 366 * atl1c_tx_timeout - Respond to a Tx Hang
367 * @netdev: network interface device structure
368 */
369static void atl1c_tx_timeout(struct net_device *netdev)
370{
371 struct atl1c_adapter *adapter = netdev_priv(netdev);
372
373 /* Do the reset outside of interrupt context */
cb771838 374 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
cb190546 375 schedule_work(&adapter->common_task);
43250ddd
JY		 376}
377
49ce9c2c 378/**
43250ddd
JY		 379 * atl1c_set_multi - Multicast and Promiscuous mode set
380 * @netdev: network interface device structure
381 *
382 * The set_multi entry point is called whenever the multicast address
383 * list or the network interface flags are updated. This routine is
384 * responsible for configuring the hardware for proper multicast,
385 * promiscuous mode, and all-multi behavior.
386 */
387static void atl1c_set_multi(struct net_device *netdev)
388{
389 struct atl1c_adapter *adapter = netdev_priv(netdev);
390 struct atl1c_hw *hw = &adapter->hw;
22bedad3 391 struct netdev_hw_addr *ha;
43250ddd
JY		 392 u32 mac_ctrl_data;
393 u32 hash_value;
394
395 /* Check for Promiscuous and All Multicast modes */
396 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
397
398 if (netdev->flags & IFF_PROMISC) {
399 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
400 } else if (netdev->flags & IFF_ALLMULTI) {
401 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
402 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
403 } else {
404 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
405 }
406
407 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
408
409 /* clear the old settings from the multicast hash table */
410 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
411 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
412
413 /* comoute mc addresses' hash value ,and put it into hash table */
22bedad3
JP		 414 netdev_for_each_mc_addr(ha, netdev) {
415 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
43250ddd
JY		 416 atl1c_hash_set(hw, hash_value);
417 }
418}
419
c8f44aff 420static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
46facce9 421{
f646968f 422 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
46facce9
JP		 423 /* enable VLAN tag insert/strip */
424 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
425 } else {
426 /* disable VLAN tag insert/strip */
427 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
428 }
429}
430
c8f44aff
MM		 431static void atl1c_vlan_mode(struct net_device *netdev,
432 netdev_features_t features)
43250ddd
JY		 433{
434 struct atl1c_adapter *adapter = netdev_priv(netdev);
435 struct pci_dev *pdev = adapter->pdev;
436 u32 mac_ctrl_data = 0;
437
438 if (netif_msg_pktdata(adapter))
46facce9 439 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
43250ddd
JY		 440
441 atl1c_irq_disable(adapter);
43250ddd 442 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
46facce9 443 __atl1c_vlan_mode(features, &mac_ctrl_data);
43250ddd
JY		 444 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
445 atl1c_irq_enable(adapter);
446}
447
448static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
449{
450 struct pci_dev *pdev = adapter->pdev;
451
452 if (netif_msg_pktdata(adapter))
46facce9
JP		 453 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
454 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
43250ddd 455}
46facce9 456
49ce9c2c 457/**
43250ddd
JY		 458 * atl1c_set_mac - Change the Ethernet Address of the NIC
459 * @netdev: network interface device structure
460 * @p: pointer to an address structure
461 *
462 * Returns 0 on success, negative on failure
463 */
464static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
465{
466 struct atl1c_adapter *adapter = netdev_priv(netdev);
467 struct sockaddr *addr = p;
468
469 if (!is_valid_ether_addr(addr->sa_data))
470 return -EADDRNOTAVAIL;
471
472 if (netif_running(netdev))
473 return -EBUSY;
474
475 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
476 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
477
229e6b6e 478 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
43250ddd
JY		 479
480 return 0;
481}
482
483static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
484 struct net_device *dev)
485{
7b701764 486 unsigned int head_size;
43250ddd
JY		 487 int mtu = dev->mtu;
488
489 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
490 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
7b701764
ED		 491
492 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
493 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
494 adapter->rx_frag_size = roundup_pow_of_two(head_size);
43250ddd 495}
782d640a 496
c8f44aff
MM		 497static netdev_features_t atl1c_fix_features(struct net_device *netdev,
498 netdev_features_t features)
782d640a 499{
46facce9
JP		 500 /*
501 * Since there is no support for separate rx/tx vlan accel
502 * enable/disable make sure tx flag is always in same state as rx.
503 */
f646968f
PM		 504 if (features & NETIF_F_HW_VLAN_CTAG_RX)
505 features |= NETIF_F_HW_VLAN_CTAG_TX;
46facce9 506 else
f646968f 507 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
46facce9 508
782d640a
MM		 509 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
510 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
511
512 return features;
513}
514
c8f44aff
MM		 515static int atl1c_set_features(struct net_device *netdev,
516 netdev_features_t features)
46facce9 517{
c8f44aff 518 netdev_features_t changed = netdev->features ^ features;
46facce9 519
f646968f 520 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
46facce9
JP		 521 atl1c_vlan_mode(netdev, features);
522
523 return 0;
524}
525
49ce9c2c 526/**
43250ddd
JY		 527 * atl1c_change_mtu - Change the Maximum Transfer Unit
528 * @netdev: network interface device structure
529 * @new_mtu: new value for maximum frame size
530 *
531 * Returns 0 on success, negative on failure
532 */
533static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
534{
535 struct atl1c_adapter *adapter = netdev_priv(netdev);
c08b9b2a 536 struct atl1c_hw *hw = &adapter->hw;
43250ddd
JY		 537 int old_mtu = netdev->mtu;
538 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
539
c08b9b2a
HX		 540 /* Fast Ethernet controller doesn't support jumbo packet */
541 if (((hw->nic_type == athr_l2c ||
542 hw->nic_type == athr_l2c_b ||
543 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
544 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
545 max_frame > MAX_JUMBO_FRAME_SIZE) {
43250ddd
JY		 546 if (netif_msg_link(adapter))
547 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
548 return -EINVAL;
549 }
550 /* set MTU */
551 if (old_mtu != new_mtu && netif_running(netdev)) {
552 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
553 msleep(1);
554 netdev->mtu = new_mtu;
555 adapter->hw.max_frame_size = new_mtu;
556 atl1c_set_rxbufsize(adapter, netdev);
557 atl1c_down(adapter);
782d640a 558 netdev_update_features(netdev);
43250ddd
JY		 559 atl1c_up(adapter);
560 clear_bit(__AT_RESETTING, &adapter->flags);
43250ddd
JY		 561 }
562 return 0;
563}
564
565/*
566 * caller should hold mdio_lock
567 */
568static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
569{
570 struct atl1c_adapter *adapter = netdev_priv(netdev);
571 u16 result;
572
2528a5dc 573 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
43250ddd
JY		 574 return result;
575}
576
577static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
578 int reg_num, int val)
579{
580 struct atl1c_adapter *adapter = netdev_priv(netdev);
581
2528a5dc 582 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
43250ddd
JY		 583}
584
43250ddd
JY		 585static int atl1c_mii_ioctl(struct net_device *netdev,
586 struct ifreq *ifr, int cmd)
587{
588 struct atl1c_adapter *adapter = netdev_priv(netdev);
589 struct pci_dev *pdev = adapter->pdev;
590 struct mii_ioctl_data *data = if_mii(ifr);
591 unsigned long flags;
592 int retval = 0;
593
594 if (!netif_running(netdev))
595 return -EINVAL;
596
597 spin_lock_irqsave(&adapter->mdio_lock, flags);
598 switch (cmd) {
599 case SIOCGMIIPHY:
600 data->phy_id = 0;
601 break;
602
603 case SIOCGMIIREG:
43250ddd
JY		 604 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
605 &data->val_out)) {
606 retval = -EIO;
607 goto out;
608 }
609 break;
610
611 case SIOCSMIIREG:
43250ddd
JY		 612 if (data->reg_num & ~(0x1F)) {
613 retval = -EFAULT;
614 goto out;
615 }
616
617 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
618 data->reg_num, data->val_in);
619 if (atl1c_write_phy_reg(&adapter->hw,
620 data->reg_num, data->val_in)) {
621 retval = -EIO;
622 goto out;
623 }
624 break;
625
626 default:
627 retval = -EOPNOTSUPP;
628 break;
629 }
630out:
631 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
632 return retval;
633}
634
43250ddd
JY		 635static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
636{
637 switch (cmd) {
638 case SIOCGMIIPHY:
639 case SIOCGMIIREG:
640 case SIOCSMIIREG:
641 return atl1c_mii_ioctl(netdev, ifr, cmd);
642 default:
643 return -EOPNOTSUPP;
644 }
645}
646
49ce9c2c 647/**
43250ddd
JY		 648 * atl1c_alloc_queues - Allocate memory for all rings
649 * @adapter: board private structure to initialize
650 *
651 */
093d369d 652static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
43250ddd
JY		 653{
654 return 0;
655}
656
657static void atl1c_set_mac_type(struct atl1c_hw *hw)
658{
659 switch (hw->device_id) {
660 case PCI_DEVICE_ID_ATTANSIC_L2C:
661 hw->nic_type = athr_l2c;
662 break;
43250ddd
JY		 663 case PCI_DEVICE_ID_ATTANSIC_L1C:
664 hw->nic_type = athr_l1c;
665 break;
496c185c
LR		 666 case PCI_DEVICE_ID_ATHEROS_L2C_B:
667 hw->nic_type = athr_l2c_b;
668 break;
669 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
670 hw->nic_type = athr_l2c_b2;
671 break;
672 case PCI_DEVICE_ID_ATHEROS_L1D:
673 hw->nic_type = athr_l1d;
674 break;
8f574b35
JY		 675 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
676 hw->nic_type = athr_l1d_2;
677 break;
43250ddd
JY		 678 default:
679 break;
680 }
681}
682
683static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
684{
43250ddd
JY		 685 u32 link_ctrl_data;
686
687 atl1c_set_mac_type(hw);
43250ddd
JY		 688 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
689
8f574b35 690 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
43250ddd 691 ATL1C_TXQ_MODE_ENHANCE;
024e1e4d
HX		 692 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
693 ATL1C_ASPM_L1_SUPPORT;
8f574b35 694 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
43250ddd 695
496c185c 696 if (hw->nic_type == athr_l1c ||
8f574b35
JY		 697 hw->nic_type == athr_l1d ||
698 hw->nic_type == athr_l1d_2)
496c185c 699 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
43250ddd
JY		 700 return 0;
701}
903d7ce0
HX		 702
703struct atl1c_platform_patch {
704 u16 pci_did;
705 u8 pci_revid;
706 u16 subsystem_vid;
707 u16 subsystem_did;
708 u32 patch_flag;
709#define ATL1C_LINK_PATCH 0x1
710};
093d369d 711static const struct atl1c_platform_patch plats[] = {
903d7ce0
HX		 712{0x2060, 0xC1, 0x1019, 0x8152, 0x1},
713{0x2060, 0xC1, 0x1019, 0x2060, 0x1},
714{0x2060, 0xC1, 0x1019, 0xE000, 0x1},
715{0x2062, 0xC0, 0x1019, 0x8152, 0x1},
716{0x2062, 0xC0, 0x1019, 0x2062, 0x1},
717{0x2062, 0xC0, 0x1458, 0xE000, 0x1},
718{0x2062, 0xC1, 0x1019, 0x8152, 0x1},
719{0x2062, 0xC1, 0x1019, 0x2062, 0x1},
720{0x2062, 0xC1, 0x1458, 0xE000, 0x1},
721{0x2062, 0xC1, 0x1565, 0x2802, 0x1},
722{0x2062, 0xC1, 0x1565, 0x2801, 0x1},
723{0x1073, 0xC0, 0x1019, 0x8151, 0x1},
724{0x1073, 0xC0, 0x1019, 0x1073, 0x1},
725{0x1073, 0xC0, 0x1458, 0xE000, 0x1},
726{0x1083, 0xC0, 0x1458, 0xE000, 0x1},
727{0x1083, 0xC0, 0x1019, 0x8151, 0x1},
728{0x1083, 0xC0, 0x1019, 0x1083, 0x1},
729{0x1083, 0xC0, 0x1462, 0x7680, 0x1},
730{0x1083, 0xC0, 0x1565, 0x2803, 0x1},
731{0},
732};
733
093d369d 734static void atl1c_patch_assign(struct atl1c_hw *hw)
903d7ce0 735{
fa0afcd1
CR		 736 struct pci_dev *pdev = hw->adapter->pdev;
737 u32 misc_ctrl;
903d7ce0
HX		 738 int i = 0;
739
740 hw->msi_lnkpatch = false;
741
742 while (plats[i].pci_did != 0) {
743 if (plats[i].pci_did == hw->device_id &&
744 plats[i].pci_revid == hw->revision_id &&
745 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
746 plats[i].subsystem_did == hw->subsystem_id) {
747 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
748 hw->msi_lnkpatch = true;
749 }
750 i++;
751 }
fa0afcd1
CR		 752
753 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
754 hw->revision_id == L2CB_V21) {
dbedd44e 755 /* config access mode */
fa0afcd1
CR		 756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
757 REG_PCIE_DEV_MISC_CTRL);
758 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
759 misc_ctrl &= ~0x100;
760 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
761 REG_PCIE_DEV_MISC_CTRL);
762 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
763 }
903d7ce0 764}
49ce9c2c 765/**
43250ddd
JY		 766 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
767 * @adapter: board private structure to initialize
768 *
769 * atl1c_sw_init initializes the Adapter private data structure.
770 * Fields are initialized based on PCI device information and
771 * OS network device settings (MTU size).
772 */
093d369d 773static int atl1c_sw_init(struct atl1c_adapter *adapter)
43250ddd
JY		 774{
775 struct atl1c_hw *hw = &adapter->hw;
776 struct pci_dev *pdev = adapter->pdev;
8f574b35
JY		 777 u32 revision;
778
43250ddd
JY		 779
780 adapter->wol = 0;
762e3023 781 device_set_wakeup_enable(&pdev->dev, false);
43250ddd
JY		 782 adapter->link_speed = SPEED_0;
783 adapter->link_duplex = FULL_DUPLEX;
43250ddd 784 adapter->tpd_ring[0].count = 1024;
9f1fd0ef 785 adapter->rfd_ring.count = 512;
43250ddd
JY		 786
787 hw->vendor_id = pdev->vendor;
788 hw->device_id = pdev->device;
789 hw->subsystem_vendor_id = pdev->subsystem_vendor;
790 hw->subsystem_id = pdev->subsystem_device;
fa0afcd1 791 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
8f574b35 792 hw->revision_id = revision & 0xFF;
43250ddd
JY		 793 /* before link up, we assume hibernate is true */
794 hw->hibernate = true;
795 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
796 if (atl1c_setup_mac_funcs(hw) != 0) {
797 dev_err(&pdev->dev, "set mac function pointers failed\n");
798 return -1;
799 }
903d7ce0
HX		 800 atl1c_patch_assign(hw);
801
43250ddd
JY		 802 hw->intr_mask = IMR_NORMAL_MASK;
803 hw->phy_configured = false;
804 hw->preamble_len = 7;
805 hw->max_frame_size = adapter->netdev->mtu;
43250ddd
JY		 806 hw->autoneg_advertised = ADVERTISED_Autoneg;
807 hw->indirect_tab = 0xE4E4E4E4;
808 hw->base_cpu = 0;
809
810 hw->ict = 50000; /* 100ms */
811 hw->smb_timer = 200000; /* 400ms */
43250ddd
JY		 812 hw->rx_imt = 200;
813 hw->tx_imt = 1000;
814
815 hw->tpd_burst = 5;
816 hw->rfd_burst = 8;
817 hw->dma_order = atl1c_dma_ord_out;
818 hw->dmar_block = atl1c_dma_req_1024;
43250ddd
JY		 819
820 if (atl1c_alloc_queues(adapter)) {
821 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
822 return -ENOMEM;
823 }
824 /* TODO */
825 atl1c_set_rxbufsize(adapter, adapter->netdev);
826 atomic_set(&adapter->irq_sem, 1);
827 spin_lock_init(&adapter->mdio_lock);
828 spin_lock_init(&adapter->tx_lock);
829 set_bit(__AT_DOWN, &adapter->flags);
830
831 return 0;
832}
833
c6060be4 834static inline void atl1c_clean_buffer(struct pci_dev *pdev,
07641c8f 835 struct atl1c_buffer *buffer_info)
c6060be4 836{
4b45e342 837 u16 pci_driection;
c6060be4
JY		 838 if (buffer_info->flags & ATL1C_BUFFER_FREE)
839 return;
840 if (buffer_info->dma) {
4b45e342
JY		 841 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
842 pci_driection = PCI_DMA_FROMDEVICE;
843 else
844 pci_driection = PCI_DMA_TODEVICE;
845
c6060be4
JY		 846 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
847 pci_unmap_single(pdev, buffer_info->dma,
4b45e342 848 buffer_info->length, pci_driection);
c6060be4
JY		 849 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
850 pci_unmap_page(pdev, buffer_info->dma,
4b45e342 851 buffer_info->length, pci_driection);
c6060be4 852 }
07641c8f
EB		 853 if (buffer_info->skb)
854 dev_consume_skb_any(buffer_info->skb);
c6060be4
JY		 855 buffer_info->dma = 0;
856 buffer_info->skb = NULL;
857 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
858}
49ce9c2c 859/**
43250ddd
JY		 860 * atl1c_clean_tx_ring - Free Tx-skb
861 * @adapter: board private structure
862 */
863static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
864 enum atl1c_trans_queue type)
865{
866 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
867 struct atl1c_buffer *buffer_info;
868 struct pci_dev *pdev = adapter->pdev;
869 u16 index, ring_count;
870
871 ring_count = tpd_ring->count;
872 for (index = 0; index < ring_count; index++) {
873 buffer_info = &tpd_ring->buffer_info[index];
07641c8f 874 atl1c_clean_buffer(pdev, buffer_info);
43250ddd
JY		 875 }
876
877 /* Zero out Tx-buffers */
878 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
c6060be4 879 ring_count);
43250ddd
JY		 880 atomic_set(&tpd_ring->next_to_clean, 0);
881 tpd_ring->next_to_use = 0;
882}
883
49ce9c2c 884/**
43250ddd
JY		 885 * atl1c_clean_rx_ring - Free rx-reservation skbs
886 * @adapter: board private structure
887 */
888static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
889{
9f1fd0ef
HX		 890 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
891 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 892 struct atl1c_buffer *buffer_info;
893 struct pci_dev *pdev = adapter->pdev;
9f1fd0ef 894 int j;
43250ddd 895
9f1fd0ef
HX		 896 for (j = 0; j < rfd_ring->count; j++) {
897 buffer_info = &rfd_ring->buffer_info[j];
07641c8f 898 atl1c_clean_buffer(pdev, buffer_info);
43250ddd 899 }
9f1fd0ef
HX		 900 /* zero out the descriptor ring */
901 memset(rfd_ring->desc, 0, rfd_ring->size);
902 rfd_ring->next_to_clean = 0;
903 rfd_ring->next_to_use = 0;
904 rrd_ring->next_to_use = 0;
905 rrd_ring->next_to_clean = 0;
43250ddd
JY		 906}
907
908/*
909 * Read / Write Ptr Initialize:
910 */
911static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
912{
913 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
9f1fd0ef
HX		 914 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
915 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 916 struct atl1c_buffer *buffer_info;
917 int i, j;
918
919 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
920 tpd_ring[i].next_to_use = 0;
921 atomic_set(&tpd_ring[i].next_to_clean, 0);
922 buffer_info = tpd_ring[i].buffer_info;
923 for (j = 0; j < tpd_ring->count; j++)
c6060be4
JY		 924 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
925 ATL1C_BUFFER_FREE);
43250ddd 926 }
9f1fd0ef
HX		 927 rfd_ring->next_to_use = 0;
928 rfd_ring->next_to_clean = 0;
929 rrd_ring->next_to_use = 0;
930 rrd_ring->next_to_clean = 0;
931 for (j = 0; j < rfd_ring->count; j++) {
932 buffer_info = &rfd_ring->buffer_info[j];
933 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
43250ddd
JY		 934 }
935}
936
49ce9c2c 937/**
43250ddd
JY		 938 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
939 * @adapter: board private structure
940 *
941 * Free all transmit software resources
942 */
943static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
944{
945 struct pci_dev *pdev = adapter->pdev;
946
947 pci_free_consistent(pdev, adapter->ring_header.size,
948 adapter->ring_header.desc,
949 adapter->ring_header.dma);
950 adapter->ring_header.desc = NULL;
951
952 /* Note: just free tdp_ring.buffer_info,
953 * it contain rfd_ring.buffer_info, do not double free */
954 if (adapter->tpd_ring[0].buffer_info) {
955 kfree(adapter->tpd_ring[0].buffer_info);
956 adapter->tpd_ring[0].buffer_info = NULL;
957 }
7b701764
ED		 958 if (adapter->rx_page) {
959 put_page(adapter->rx_page);
960 adapter->rx_page = NULL;
961 }
43250ddd
JY		 962}
963
49ce9c2c 964/**
43250ddd
JY		 965 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
966 * @adapter: board private structure
967 *
968 * Return 0 on success, negative on failure
969 */
970static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
971{
972 struct pci_dev *pdev = adapter->pdev;
973 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
9f1fd0ef
HX		 974 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
975 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd 976 struct atl1c_ring_header *ring_header = &adapter->ring_header;
43250ddd
JY		 977 int size;
978 int i;
979 int count = 0;
980 int rx_desc_count = 0;
981 u32 offset = 0;
982
9f1fd0ef 983 rrd_ring->count = rfd_ring->count;
43250ddd
JY		 984 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
985 tpd_ring[i].count = tpd_ring[0].count;
986
43250ddd
JY		 987 /* 2 tpd queue, one high priority queue,
988 * another normal priority queue */
989 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
9f1fd0ef 990 rfd_ring->count);
43250ddd 991 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
b2adaca9 992 if (unlikely(!tpd_ring->buffer_info))
43250ddd 993 goto err_nomem;
b2adaca9 994
43250ddd
JY		 995 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
996 tpd_ring[i].buffer_info =
64699336 997 (tpd_ring->buffer_info + count);
43250ddd
JY		 998 count += tpd_ring[i].count;
999 }
1000
9f1fd0ef 1001 rfd_ring->buffer_info =
64699336 1002 (tpd_ring->buffer_info + count);
9f1fd0ef
HX		 1003 count += rfd_ring->count;
1004 rx_desc_count += rfd_ring->count;
1005
43250ddd
JY		 1006 /*
1007 * real ring DMA buffer
1008 * each ring/block may need up to 8 bytes for alignment, hence the
1009 * additional bytes tacked onto the end.
1010 */
1011 ring_header->size = size =
1012 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1013 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1014 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
8d5c6836 1015 8 * 4;
43250ddd
JY		 1016
1017 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1018 &ring_header->dma);
1019 if (unlikely(!ring_header->desc)) {
1020 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1021 goto err_nomem;
1022 }
1023 memset(ring_header->desc, 0, ring_header->size);
1024 /* init TPD ring */
1025
1026 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1027 offset = tpd_ring[0].dma - ring_header->dma;
1028 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1029 tpd_ring[i].dma = ring_header->dma + offset;
1030 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1031 tpd_ring[i].size =
1032 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1033 offset += roundup(tpd_ring[i].size, 8);
1034 }
1035 /* init RFD ring */
9f1fd0ef
HX		 1036 rfd_ring->dma = ring_header->dma + offset;
1037 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1038 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1039 offset += roundup(rfd_ring->size, 8);
43250ddd
JY		 1040
1041 /* init RRD ring */
9f1fd0ef
HX		 1042 rrd_ring->dma = ring_header->dma + offset;
1043 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1044 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1045 rrd_ring->count;
1046 offset += roundup(rrd_ring->size, 8);
43250ddd 1047
43250ddd
JY		 1048 return 0;
1049
1050err_nomem:
1051 kfree(tpd_ring->buffer_info);
1052 return -ENOMEM;
1053}
1054
1055static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1056{
1057 struct atl1c_hw *hw = &adapter->hw;
9f1fd0ef
HX		 1058 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1059 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 1060 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1061 adapter->tpd_ring;
43250ddd
JY		 1062
1063 /* TPD */
1064 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1065 (u32)((tpd_ring[atl1c_trans_normal].dma &
1066 AT_DMA_HI_ADDR_MASK) >> 32));
1067 /* just enable normal priority TX queue */
0af48336 1068 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
43250ddd
JY		 1069 (u32)(tpd_ring[atl1c_trans_normal].dma &
1070 AT_DMA_LO_ADDR_MASK));
0af48336 1071 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
43250ddd
JY		 1072 (u32)(tpd_ring[atl1c_trans_high].dma &
1073 AT_DMA_LO_ADDR_MASK));
1074 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1075 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1076
1077
1078 /* RFD */
1079 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
9f1fd0ef
HX		 1080 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1081 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1082 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
43250ddd
JY		 1083
1084 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
9f1fd0ef 1085 rfd_ring->count & RFD_RING_SIZE_MASK);
43250ddd
JY		 1086 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1087 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1088
1089 /* RRD */
9f1fd0ef
HX		 1090 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1091 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
43250ddd 1092 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
9f1fd0ef 1093 (rrd_ring->count & RRD_RING_SIZE_MASK));
43250ddd 1094
8f574b35
JY		 1095 if (hw->nic_type == athr_l2c_b) {
1096 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1097 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1098 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1099 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1100 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1101 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1102 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1103 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1104 }
43250ddd
JY		 1105 /* Load all of base address above */
1106 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1107}
1108
1109static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1110{
1111 struct atl1c_hw *hw = &adapter->hw;
59e26eff 1112 int max_pay_load;
43250ddd
JY		 1113 u16 tx_offload_thresh;
1114 u32 txq_ctrl_data;
43250ddd 1115
c08b9b2a 1116 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
43250ddd
JY		 1117 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1118 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
59e26eff 1119 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
81b504b8 1120 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
59e26eff
HX		 1121 /*
1122 * if BIOS had changed the dam-read-max-length to an invalid value,
1123 * restore it to default value
1124 */
1125 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1126 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1127 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1128 }
c24588af
HX		 1129 txq_ctrl_data =
1130 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1131 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
43250ddd
JY		 1132
1133 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1134}
1135
1136static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1137{
1138 struct atl1c_hw *hw = &adapter->hw;
1139 u32 rxq_ctrl_data;
1140
1141 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1142 RXQ_RFD_BURST_NUM_SHIFT;
1143
1144 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1145 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
9f1fd0ef 1146
9c528218
HX		 1147 /* aspm for gigabit */
1148 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1149 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1150 ASPM_THRUPUT_LIMIT_100M);
43250ddd
JY		 1151
1152 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1153}
1154
43250ddd
JY		 1155static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1156{
1157 struct atl1c_hw *hw = &adapter->hw;
1158 u32 dma_ctrl_data;
1159
37bfccb5
HX		 1160 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1161 DMA_CTRL_RREQ_PRI_DATA |
1162 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1163 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1164 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
43250ddd
JY		 1165
1166 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1167}
1168
1169/*
1170 * Stop the mac, transmit and receive units
1171 * hw - Struct containing variables accessed by shared code
1172 * return : 0 or idle status (if error)
1173 */
1174static int atl1c_stop_mac(struct atl1c_hw *hw)
1175{
1176 u32 data;
43250ddd
JY		 1177
1178 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
027392c2 1179 data &= ~RXQ_CTRL_EN;
43250ddd
JY		 1180 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1181
1182 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1183 data &= ~TXQ_CTRL_EN;
0cbec61c 1184 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
43250ddd 1185
969a7ee2 1186 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
43250ddd
JY		 1187
1188 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1189 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1190 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1191
969a7ee2
HX		 1192 return (int)atl1c_wait_until_idle(hw,
1193 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
43250ddd
JY		 1194}
1195
25456e5c 1196static void atl1c_start_mac(struct atl1c_adapter *adapter)
43250ddd 1197{
25456e5c
HX		 1198 struct atl1c_hw *hw = &adapter->hw;
1199 u32 mac, txq, rxq;
1200
1201 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1202 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1203 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1204
1205 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1206 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1207 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1208
1209 txq |= TXQ_CTRL_EN;
1210 rxq |= RXQ_CTRL_EN;
1211 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1212 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1213 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1214 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1215 MAC_CTRL_HASH_ALG_CRC32;
1216 if (hw->mac_duplex)
1217 mac |= MAC_CTRL_DUPLX;
1218 else
1219 mac &= ~MAC_CTRL_DUPLX;
1220 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1221 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
43250ddd 1222
25456e5c
HX		 1223 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1224 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1225 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
43250ddd
JY		 1226}
1227
1228/*
1229 * Reset the transmit and receive units; mask and clear all interrupts.
1230 * hw - Struct containing variables accessed by shared code
1231 * return : 0 or idle status (if error)
1232 */
1233static int atl1c_reset_mac(struct atl1c_hw *hw)
1234{
64699336 1235 struct atl1c_adapter *adapter = hw->adapter;
43250ddd 1236 struct pci_dev *pdev = adapter->pdev;
7737fd96 1237 u32 ctrl_data = 0;
43250ddd 1238
8f574b35 1239 atl1c_stop_mac(hw);
43250ddd
JY		 1240 /*
1241 * Issue Soft Reset to the MAC. This will reset the chip's
1242 * transmit, receive, DMA. It will not effect
1243 * the current PCI configuration. The global reset bit is self-
1244 * clearing, and should clear within a microsecond.
1245 */
7737fd96
HX		 1246 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1247 ctrl_data |= MASTER_CTRL_OOB_DIS;
1248 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
8f574b35 1249
43250ddd
JY		 1250 AT_WRITE_FLUSH(hw);
1251 msleep(10);
1252 /* Wait at least 10ms for All module to be Idle */
c930a662 1253
969a7ee2 1254 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
43250ddd 1255 dev_err(&pdev->dev,
c930a662 1256 "MAC state machine can't be idle since"
43250ddd
JY		 1257 " disabled for 10ms second\n");
1258 return -1;
1259 }
7737fd96
HX		 1260 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1261
1262 /* driver control speed/duplex */
1263 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1264 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1265
1266 /* clk switch setting */
1267 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1268 switch (hw->nic_type) {
1269 case athr_l2c_b:
1270 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1271 SERDES_MAC_CLK_SLOWDOWN);
1272 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1273 break;
1274 case athr_l2c_b2:
1275 case athr_l1d_2:
1276 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1277 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1278 break;
1279 default:
1280 break;
1281 }
ebe22ed9 1282
43250ddd
JY		 1283 return 0;
1284}
1285
1286static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1287{
024e1e4d 1288 u16 ctrl_flags = hw->ctrl_flags;
43250ddd 1289
024e1e4d
HX		 1290 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1291 atl1c_set_aspm(hw, SPEED_0);
1292 hw->ctrl_flags = ctrl_flags;
43250ddd
JY		 1293}
1294
1295/*
1296 * Set ASPM state.
1297 * Enable/disable L0s/L1 depend on link state.
1298 */
024e1e4d 1299static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
43250ddd
JY		 1300{
1301 u32 pm_ctrl_data;
024e1e4d 1302 u32 link_l1_timer;
43250ddd
JY		 1303
1304 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
024e1e4d
HX		 1305 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1306 PM_CTRL_ASPM_L0S_EN |
1307 PM_CTRL_MAC_ASPM_CHK);
1308 /* L1 timer */
1309 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1310 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1311 link_l1_timer =
1312 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1313 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1314 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1315 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1316 } else {
1317 link_l1_timer = hw->nic_type == athr_l2c_b ?
1318 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1319 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1320 link_l1_timer = 1;
1321 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1322 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1323 }
496c185c 1324
024e1e4d 1325 /* L0S/L1 enable */
4fc36352 1326 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
024e1e4d
HX		 1327 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1328 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1329 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
496c185c 1330
024e1e4d 1331 /* l2cb & l1d & l2cb2 & l1d2 */
8f574b35 1332 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
024e1e4d
HX		 1333 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1334 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1335 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1336 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1337 PM_CTRL_SERDES_PD_EX_L1 |
1338 PM_CTRL_CLK_SWH_L1;
1339 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1340 PM_CTRL_SERDES_PLL_L1_EN |
1341 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1342 PM_CTRL_SA_DLY_EN |
1343 PM_CTRL_HOTRST);
1344 /* disable l0s if link down or l2cb */
1345 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
496c185c 1346 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
024e1e4d
HX		 1347 } else { /* l1c */
1348 pm_ctrl_data =
1349 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1350 if (link_speed != SPEED_0) {
1351 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1352 PM_CTRL_SERDES_PLL_L1_EN |
1353 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1354 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1355 PM_CTRL_CLK_SWH_L1 |
1356 PM_CTRL_ASPM_L0S_EN |
1357 PM_CTRL_ASPM_L1_EN);
1358 } else { /* link down */
1359 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1360 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1361 PM_CTRL_SERDES_PLL_L1_EN |
1362 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1363 PM_CTRL_ASPM_L0S_EN);
8f574b35 1364 }
43250ddd 1365 }
43250ddd 1366 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
8f574b35
JY		 1367
1368 return;
43250ddd
JY		 1369}
1370
49ce9c2c 1371/**
43250ddd
JY		 1372 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1373 * @adapter: board private structure
1374 *
1375 * Configure the Tx /Rx unit of the MAC after a reset.
1376 */
5e5c0964 1377static int atl1c_configure_mac(struct atl1c_adapter *adapter)
43250ddd
JY		 1378{
1379 struct atl1c_hw *hw = &adapter->hw;
1380 u32 master_ctrl_data = 0;
1381 u32 intr_modrt_data;
8f574b35 1382 u32 data;
43250ddd 1383
ebe22ed9
HX		 1384 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1385 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1386 MASTER_CTRL_RX_ITIMER_EN |
1387 MASTER_CTRL_INT_RDCLR);
43250ddd
JY		 1388 /* clear interrupt status */
1389 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1390 /* Clear any WOL status */
1391 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1392 /* set Interrupt Clear Timer
1393 * HW will enable self to assert interrupt event to system after
1394 * waiting x-time for software to notify it accept interrupt.
1395 */
8f574b35
JY		 1396
1397 data = CLK_GATING_EN_ALL;
1398 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1399 if (hw->nic_type == athr_l2c_b)
1400 data &= ~CLK_GATING_RXMAC_EN;
1401 } else
1402 data = 0;
1403 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1404
43250ddd
JY		 1405 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1406 hw->ict & INT_RETRIG_TIMER_MASK);
1407
1408 atl1c_configure_des_ring(adapter);
1409
1410 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1411 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1412 IRQ_MODRT_TX_TIMER_SHIFT;
1413 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1414 IRQ_MODRT_RX_TIMER_SHIFT;
1415 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1416 master_ctrl_data |=
1417 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1418 }
1419
1420 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1421 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1422
8f574b35 1423 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
43250ddd
JY		 1424 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1425
8d5c6836
HX		 1426 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1427 hw->smb_timer & SMB_STAT_TIMER_MASK);
43250ddd 1428
43250ddd
JY		 1429 /* set MTU */
1430 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1431 VLAN_HLEN + ETH_FCS_LEN);
43250ddd
JY		 1432
1433 atl1c_configure_tx(adapter);
1434 atl1c_configure_rx(adapter);
43250ddd
JY		 1435 atl1c_configure_dma(adapter);
1436
1437 return 0;
1438}
1439
5e5c0964
HX		 1440static int atl1c_configure(struct atl1c_adapter *adapter)
1441{
1442 struct net_device *netdev = adapter->netdev;
1443 int num;
1444
1445 atl1c_init_ring_ptrs(adapter);
1446 atl1c_set_multi(netdev);
1447 atl1c_restore_vlan(adapter);
1448
1449 num = atl1c_alloc_rx_buffer(adapter);
1450 if (unlikely(num == 0))
1451 return -ENOMEM;
1452
1453 if (atl1c_configure_mac(adapter))
1454 return -EIO;
1455
1456 return 0;
1457}
1458
43250ddd
JY		 1459static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1460{
1461 u16 hw_reg_addr = 0;
1462 unsigned long *stats_item = NULL;
1463 u32 data;
1464
1465 /* update rx status */
1466 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1467 stats_item = &adapter->hw_stats.rx_ok;
1468 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1469 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1470 *stats_item += data;
1471 stats_item++;
1472 hw_reg_addr += 4;
1473 }
1474/* update tx status */
1475 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1476 stats_item = &adapter->hw_stats.tx_ok;
1477 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1478 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1479 *stats_item += data;
1480 stats_item++;
1481 hw_reg_addr += 4;
1482 }
1483}
1484
49ce9c2c 1485/**
43250ddd
JY		 1486 * atl1c_get_stats - Get System Network Statistics
1487 * @netdev: network interface device structure
1488 *
1489 * Returns the address of the device statistics structure.
1490 * The statistics are actually updated from the timer callback.
1491 */
1492static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1493{
1494 struct atl1c_adapter *adapter = netdev_priv(netdev);
1495 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
a2c483a1 1496 struct net_device_stats *net_stats = &netdev->stats;
43250ddd
JY		 1497
1498 atl1c_update_hw_stats(adapter);
43250ddd
JY		 1499 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1500 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1501 net_stats->multicast = hw_stats->rx_mcast;
1502 net_stats->collisions = hw_stats->tx_1_col +
8560258f
SD		 1503 hw_stats->tx_2_col +
1504 hw_stats->tx_late_col +
1505 hw_stats->tx_abort_col;
1506
1507 net_stats->rx_errors = hw_stats->rx_frag +
1508 hw_stats->rx_fcs_err +
1509 hw_stats->rx_len_err +
1510 hw_stats->rx_sz_ov +
1511 hw_stats->rx_rrd_ov +
1512 hw_stats->rx_align_err +
1513 hw_stats->rx_rxf_ov;
1514
43250ddd
JY		 1515 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1516 net_stats->rx_length_errors = hw_stats->rx_len_err;
1517 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1518 net_stats->rx_frame_errors = hw_stats->rx_align_err;
8560258f 1519 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
43250ddd 1520
8560258f
SD		 1521 net_stats->tx_errors = hw_stats->tx_late_col +
1522 hw_stats->tx_abort_col +
1523 hw_stats->tx_underrun +
1524 hw_stats->tx_trunc;
43250ddd 1525
43250ddd
JY		 1526 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1527 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1528 net_stats->tx_window_errors = hw_stats->tx_late_col;
1529
8560258f
SD		 1530 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1531 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1532
a2c483a1 1533 return net_stats;
43250ddd
JY		 1534}
1535
1536static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1537{
1538 u16 phy_data;
1539
1540 spin_lock(&adapter->mdio_lock);
1541 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1542 spin_unlock(&adapter->mdio_lock);
1543}
1544
1545static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1546 enum atl1c_trans_queue type)
1547{
64699336 1548 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
43250ddd 1549 struct atl1c_buffer *buffer_info;
c6060be4 1550 struct pci_dev *pdev = adapter->pdev;
43250ddd
JY		 1551 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1552 u16 hw_next_to_clean;
0af48336 1553 u16 reg;
43250ddd 1554
0af48336 1555 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
43250ddd 1556
0af48336 1557 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
43250ddd
JY		 1558
1559 while (next_to_clean != hw_next_to_clean) {
1560 buffer_info = &tpd_ring->buffer_info[next_to_clean];
07641c8f 1561 atl1c_clean_buffer(pdev, buffer_info);
43250ddd
JY		 1562 if (++next_to_clean == tpd_ring->count)
1563 next_to_clean = 0;
1564 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1565 }
1566
1567 if (netif_queue_stopped(adapter->netdev) &&
1568 netif_carrier_ok(adapter->netdev)) {
1569 netif_wake_queue(adapter->netdev);
1570 }
1571
1572 return true;
1573}
1574
49ce9c2c 1575/**
43250ddd
JY		 1576 * atl1c_intr - Interrupt Handler
1577 * @irq: interrupt number
1578 * @data: pointer to a network interface device structure
43250ddd
JY		 1579 */
1580static irqreturn_t atl1c_intr(int irq, void *data)
1581{
1582 struct net_device *netdev = data;
1583 struct atl1c_adapter *adapter = netdev_priv(netdev);
1584 struct pci_dev *pdev = adapter->pdev;
1585 struct atl1c_hw *hw = &adapter->hw;
1586 int max_ints = AT_MAX_INT_WORK;
1587 int handled = IRQ_NONE;
1588 u32 status;
1589 u32 reg_data;
1590
1591 do {
1592 AT_READ_REG(hw, REG_ISR, &reg_data);
1593 status = reg_data & hw->intr_mask;
1594
1595 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1596 if (max_ints != AT_MAX_INT_WORK)
1597 handled = IRQ_HANDLED;
1598 break;
1599 }
1600 /* link event */
1601 if (status & ISR_GPHY)
1602 atl1c_clear_phy_int(adapter);
1603 /* Ack ISR */
1604 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1605 if (status & ISR_RX_PKT) {
1606 if (likely(napi_schedule_prep(&adapter->napi))) {
1607 hw->intr_mask &= ~ISR_RX_PKT;
1608 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1609 __napi_schedule(&adapter->napi);
1610 }
1611 }
1612 if (status & ISR_TX_PKT)
1613 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1614
1615 handled = IRQ_HANDLED;
1616 /* check if PCIE PHY Link down */
1617 if (status & ISR_ERROR) {
1618 if (netif_msg_hw(adapter))
1619 dev_err(&pdev->dev,
1620 "atl1c hardware error (status = 0x%x)\n",
1621 status & ISR_ERROR);
1622 /* reset MAC */
78315457 1623 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
cb190546 1624 schedule_work(&adapter->common_task);
8f574b35 1625 return IRQ_HANDLED;
43250ddd
JY		 1626 }
1627
1628 if (status & ISR_OVER)
1629 if (netif_msg_intr(adapter))
1630 dev_warn(&pdev->dev,
af901ca1 1631 "TX/RX overflow (status = 0x%x)\n",
43250ddd
JY		 1632 status & ISR_OVER);
1633
1634 /* link event */
1635 if (status & (ISR_GPHY | ISR_MANUAL)) {
a2c483a1 1636 netdev->stats.tx_carrier_errors++;
43250ddd
JY		 1637 atl1c_link_chg_event(adapter);
1638 break;
1639 }
1640
1641 } while (--max_ints > 0);
1642 /* re-enable Interrupt*/
1643 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1644 return handled;
1645}
1646
1647static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1648 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1649{
1650 /*
1651 * The pid field in RRS in not correct sometimes, so we
1652 * cannot figure out if the packet is fragmented or not,
1653 * so we tell the KERNEL CHECKSUM_NONE
1654 */
bc8acf2c 1655 skb_checksum_none_assert(skb);
43250ddd
JY		 1656}
1657
7b701764
ED		 1658static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1659{
1660 struct sk_buff *skb;
1661 struct page *page;
1662
1663 if (adapter->rx_frag_size > PAGE_SIZE)
1664 return netdev_alloc_skb(adapter->netdev,
1665 adapter->rx_buffer_len);
1666
1667 page = adapter->rx_page;
1668 if (!page) {
1669 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1670 if (unlikely(!page))
1671 return NULL;
1672 adapter->rx_page_offset = 0;
1673 }
1674
1675 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1676 adapter->rx_frag_size);
1677 if (likely(skb)) {
1678 adapter->rx_page_offset += adapter->rx_frag_size;
1679 if (adapter->rx_page_offset >= PAGE_SIZE)
1680 adapter->rx_page = NULL;
1681 else
1682 get_page(page);
1683 }
1684 return skb;
1685}
1686
9f1fd0ef 1687static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
43250ddd 1688{
9f1fd0ef 1689 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
43250ddd
JY		 1690 struct pci_dev *pdev = adapter->pdev;
1691 struct atl1c_buffer *buffer_info, *next_info;
1692 struct sk_buff *skb;
1693 void *vir_addr = NULL;
1694 u16 num_alloc = 0;
1695 u16 rfd_next_to_use, next_next;
1696 struct atl1c_rx_free_desc *rfd_desc;
ac574804 1697 dma_addr_t mapping;
43250ddd
JY		 1698
1699 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1700 if (++next_next == rfd_ring->count)
1701 next_next = 0;
1702 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1703 next_info = &rfd_ring->buffer_info[next_next];
1704
c6060be4 1705 while (next_info->flags & ATL1C_BUFFER_FREE) {
43250ddd
JY		 1706 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1707
7b701764 1708 skb = atl1c_alloc_skb(adapter);
43250ddd
JY		 1709 if (unlikely(!skb)) {
1710 if (netif_msg_rx_err(adapter))
1711 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1712 break;
1713 }
1714
1715 /*
1716 * Make buffer alignment 2 beyond a 16 byte boundary
1717 * this will result in a 16 byte aligned IP header after
1718 * the 14 byte MAC header is removed
1719 */
1720 vir_addr = skb->data;
c6060be4 1721 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
43250ddd
JY		 1722 buffer_info->skb = skb;
1723 buffer_info->length = adapter->rx_buffer_len;
ac574804 1724 mapping = pci_map_single(pdev, vir_addr,
43250ddd
JY		 1725 buffer_info->length,
1726 PCI_DMA_FROMDEVICE);
ac574804
HX		 1727 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1728 dev_kfree_skb(skb);
1729 buffer_info->skb = NULL;
1730 buffer_info->length = 0;
1731 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1732 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1733 break;
1734 }
1735 buffer_info->dma = mapping;
4b45e342
JY		 1736 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1737 ATL1C_PCIMAP_FROMDEVICE);
43250ddd
JY		 1738 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1739 rfd_next_to_use = next_next;
1740 if (++next_next == rfd_ring->count)
1741 next_next = 0;
1742 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1743 next_info = &rfd_ring->buffer_info[next_next];
1744 num_alloc++;
1745 }
1746
1747 if (num_alloc) {
1748 /* TODO: update mailbox here */
1749 wmb();
1750 rfd_ring->next_to_use = rfd_next_to_use;
9f1fd0ef 1751 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
43250ddd
JY		 1752 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1753 }
1754
1755 return num_alloc;
1756}
1757
1758static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1759 struct atl1c_recv_ret_status *rrs, u16 num)
1760{
1761 u16 i;
1762 /* the relationship between rrd and rfd is one map one */
1763 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1764 rrd_ring->next_to_clean)) {
1765 rrs->word3 &= ~RRS_RXD_UPDATED;
1766 if (++rrd_ring->next_to_clean == rrd_ring->count)
1767 rrd_ring->next_to_clean = 0;
1768 }
1769}
1770
1771static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1772 struct atl1c_recv_ret_status *rrs, u16 num)
1773{
1774 u16 i;
1775 u16 rfd_index;
1776 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1777
1778 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1779 RRS_RX_RFD_INDEX_MASK;
1780 for (i = 0; i < num; i++) {
1781 buffer_info[rfd_index].skb = NULL;
c6060be4
JY		 1782 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1783 ATL1C_BUFFER_FREE);
43250ddd
JY		 1784 if (++rfd_index == rfd_ring->count)
1785 rfd_index = 0;
1786 }
1787 rfd_ring->next_to_clean = rfd_index;
1788}
1789
9f1fd0ef 1790static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
43250ddd
JY		 1791 int *work_done, int work_to_do)
1792{
1793 u16 rfd_num, rfd_index;
1794 u16 count = 0;
1795 u16 length;
1796 struct pci_dev *pdev = adapter->pdev;
1797 struct net_device *netdev = adapter->netdev;
9f1fd0ef
HX		 1798 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1799 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
43250ddd
JY		 1800 struct sk_buff *skb;
1801 struct atl1c_recv_ret_status *rrs;
1802 struct atl1c_buffer *buffer_info;
1803
1804 while (1) {
1805 if (*work_done >= work_to_do)
1806 break;
1807 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1808 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1809 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1810 RRS_RX_RFD_CNT_MASK;
37b76c69 1811 if (unlikely(rfd_num != 1))
43250ddd
JY		 1812 /* TODO support mul rfd*/
1813 if (netif_msg_rx_err(adapter))
1814 dev_warn(&pdev->dev,
1815 "Multi rfd not support yet!\n");
1816 goto rrs_checked;
1817 } else {
1818 break;
1819 }
1820rrs_checked:
1821 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1822 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1823 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1824 if (netif_msg_rx_err(adapter))
1825 dev_warn(&pdev->dev,
1826 "wrong packet! rrs word3 is %x\n",
1827 rrs->word3);
1828 continue;
1829 }
1830
1831 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1832 RRS_PKT_SIZE_MASK);
1833 /* Good Receive */
1834 if (likely(rfd_num == 1)) {
1835 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1836 RRS_RX_RFD_INDEX_MASK;
1837 buffer_info = &rfd_ring->buffer_info[rfd_index];
1838 pci_unmap_single(pdev, buffer_info->dma,
1839 buffer_info->length, PCI_DMA_FROMDEVICE);
1840 skb = buffer_info->skb;
1841 } else {
1842 /* TODO */
1843 if (netif_msg_rx_err(adapter))
1844 dev_warn(&pdev->dev,
1845 "Multi rfd not support yet!\n");
1846 break;
1847 }
1848 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1849 skb_put(skb, length - ETH_FCS_LEN);
1850 skb->protocol = eth_type_trans(skb, netdev);
43250ddd 1851 atl1c_rx_checksum(adapter, skb, rrs);
46facce9 1852 if (rrs->word3 & RRS_VLAN_INS) {
43250ddd
JY		 1853 u16 vlan;
1854
1855 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1856 vlan = le16_to_cpu(vlan);
86a9bad3 1857 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
46facce9
JP		 1858 }
1859 netif_receive_skb(skb);
43250ddd 1860
43250ddd
JY		 1861 (*work_done)++;
1862 count++;
1863 }
1864 if (count)
9f1fd0ef 1865 atl1c_alloc_rx_buffer(adapter);
43250ddd
JY		 1866}
1867
49ce9c2c 1868/**
43250ddd 1869 * atl1c_clean - NAPI Rx polling callback
43250ddd
JY		 1870 */
1871static int atl1c_clean(struct napi_struct *napi, int budget)
1872{
1873 struct atl1c_adapter *adapter =
1874 container_of(napi, struct atl1c_adapter, napi);
1875 int work_done = 0;
1876
1877 /* Keep link state information with original netdev */
1878 if (!netif_carrier_ok(adapter->netdev))
1879 goto quit_polling;
1880 /* just enable one RXQ */
9f1fd0ef 1881 atl1c_clean_rx_irq(adapter, &work_done, budget);
43250ddd
JY		 1882
1883 if (work_done < budget) {
1884quit_polling:
1885 napi_complete(napi);
1886 adapter->hw.intr_mask |= ISR_RX_PKT;
1887 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1888 }
1889 return work_done;
1890}
1891
1892#ifdef CONFIG_NET_POLL_CONTROLLER
1893
1894/*
1895 * Polling 'interrupt' - used by things like netconsole to send skbs
1896 * without having to re-enable interrupts. It's not called while
1897 * the interrupt routine is executing.
1898 */
1899static void atl1c_netpoll(struct net_device *netdev)
1900{
1901 struct atl1c_adapter *adapter = netdev_priv(netdev);
1902
1903 disable_irq(adapter->pdev->irq);
1904 atl1c_intr(adapter->pdev->irq, netdev);
1905 enable_irq(adapter->pdev->irq);
1906}
1907#endif
1908
1909static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1910{
1911 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1912 u16 next_to_use = 0;
1913 u16 next_to_clean = 0;
1914
1915 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1916 next_to_use = tpd_ring->next_to_use;
1917
1918 return (u16)(next_to_clean > next_to_use) ?
1919 (next_to_clean - next_to_use - 1) :
1920 (tpd_ring->count + next_to_clean - next_to_use - 1);
1921}
1922
1923/*
1924 * get next usable tpd
1925 * Note: should call atl1c_tdp_avail to make sure
1926 * there is enough tpd to use
1927 */
1928static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1929 enum atl1c_trans_queue type)
1930{
1931 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1932 struct atl1c_tpd_desc *tpd_desc;
1933 u16 next_to_use = 0;
1934
1935 next_to_use = tpd_ring->next_to_use;
1936 if (++tpd_ring->next_to_use == tpd_ring->count)
1937 tpd_ring->next_to_use = 0;
1938 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1939 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1940 return tpd_desc;
1941}
1942
1943static struct atl1c_buffer *
1944atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1945{
1946 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1947
1948 return &tpd_ring->buffer_info[tpd -
1949 (struct atl1c_tpd_desc *)tpd_ring->desc];
1950}
1951
1952/* Calculate the transmit packet descript needed*/
1953static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1954{
1955 u16 tpd_req;
1956 u16 proto_hdr_len = 0;
1957
1958 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1959
1960 if (skb_is_gso(skb)) {
1961 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1962 if (proto_hdr_len < skb_headlen(skb))
1963 tpd_req++;
1964 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1965 tpd_req++;
1966 }
1967 return tpd_req;
1968}
1969
1970static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1971 struct sk_buff *skb,
1972 struct atl1c_tpd_desc **tpd,
1973 enum atl1c_trans_queue type)
1974{
1975 struct pci_dev *pdev = adapter->pdev;
0f5c113c 1976 unsigned short offload_type;
43250ddd
JY		 1977 u8 hdr_len;
1978 u32 real_len;
43250ddd
JY		 1979
1980 if (skb_is_gso(skb)) {
0f5c113c 1981 int err;
1982
1983 err = skb_cow_head(skb, 0);
1984 if (err < 0)
1985 return err;
1986
43250ddd
JY		 1987 offload_type = skb_shinfo(skb)->gso_type;
1988
1989 if (offload_type & SKB_GSO_TCPV4) {
1990 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1991 + ntohs(ip_hdr(skb)->tot_len));
1992
1993 if (real_len < skb->len)
1994 pskb_trim(skb, real_len);
1995
1996 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1997 if (unlikely(skb->len == hdr_len)) {
1998 /* only xsum need */
1999 if (netif_msg_tx_queued(adapter))
2000 dev_warn(&pdev->dev,
2001 "IPV4 tso with zero data??\n");
2002 goto check_sum;
2003 } else {
2004 ip_hdr(skb)->check = 0;
2005 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2006 ip_hdr(skb)->saddr,
2007 ip_hdr(skb)->daddr,
2008 0, IPPROTO_TCP, 0);
2009 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2010 }
2011 }
2012
2013 if (offload_type & SKB_GSO_TCPV6) {
2014 struct atl1c_tpd_ext_desc *etpd =
2015 *(struct atl1c_tpd_ext_desc **)(tpd);
2016
2017 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2018 *tpd = atl1c_get_tpd(adapter, type);
2019 ipv6_hdr(skb)->payload_len = 0;
2020 /* check payload == 0 byte ? */
2021 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2022 if (unlikely(skb->len == hdr_len)) {
2023 /* only xsum need */
2024 if (netif_msg_tx_queued(adapter))
2025 dev_warn(&pdev->dev,
2026 "IPV6 tso with zero data??\n");
2027 goto check_sum;
2028 } else
2029 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2030 &ipv6_hdr(skb)->saddr,
2031 &ipv6_hdr(skb)->daddr,
2032 0, IPPROTO_TCP, 0);
2033 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2034 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2035 etpd->pkt_len = cpu_to_le32(skb->len);
2036 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2037 }
2038
2039 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2040 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2041 TPD_TCPHDR_OFFSET_SHIFT;
2042 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2043 TPD_MSS_SHIFT;
2044 return 0;
2045 }
2046
2047check_sum:
2048 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2049 u8 css, cso;
0d0b1672 2050 cso = skb_checksum_start_offset(skb);
43250ddd
JY		 2051
2052 if (unlikely(cso & 0x1)) {
2053 if (netif_msg_tx_err(adapter))
2054 dev_err(&adapter->pdev->dev,
2055 "payload offset should not an event number\n");
2056 return -1;
2057 } else {
2058 css = cso + skb->csum_offset;
2059
2060 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2061 TPD_PLOADOFFSET_SHIFT;
2062 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2063 TPD_CCSUM_OFFSET_SHIFT;
2064 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2065 }
2066 }
2067 return 0;
2068}
2069
ac574804
HX		 2070static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2071 struct atl1c_tpd_desc *first_tpd,
2072 enum atl1c_trans_queue type)
2073{
2074 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2075 struct atl1c_buffer *buffer_info;
2076 struct atl1c_tpd_desc *tpd;
2077 u16 first_index, index;
2078
2079 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2080 index = first_index;
2081 while (index != tpd_ring->next_to_use) {
2082 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2083 buffer_info = &tpd_ring->buffer_info[index];
07641c8f 2084 atl1c_clean_buffer(adpt->pdev, buffer_info);
ac574804
HX		 2085 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2086 if (++index == tpd_ring->count)
2087 index = 0;
2088 }
2089 tpd_ring->next_to_use = first_index;
2090}
2091
2092static int atl1c_tx_map(struct atl1c_adapter *adapter,
43250ddd
JY		 2093 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2094 enum atl1c_trans_queue type)
2095{
2096 struct atl1c_tpd_desc *use_tpd = NULL;
2097 struct atl1c_buffer *buffer_info = NULL;
2098 u16 buf_len = skb_headlen(skb);
2099 u16 map_len = 0;
2100 u16 mapped_len = 0;
2101 u16 hdr_len = 0;
2102 u16 nr_frags;
2103 u16 f;
2104 int tso;
2105
2106 nr_frags = skb_shinfo(skb)->nr_frags;
2107 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2108 if (tso) {
2109 /* TSO */
2110 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2111 use_tpd = tpd;
2112
2113 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2114 buffer_info->length = map_len;
2115 buffer_info->dma = pci_map_single(adapter->pdev,
2116 skb->data, hdr_len, PCI_DMA_TODEVICE);
ac574804
HX		 2117 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2118 buffer_info->dma)))
2119 goto err_dma;
7cb08d7f 2120 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
4b45e342
JY		 2121 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2122 ATL1C_PCIMAP_TODEVICE);
43250ddd
JY		 2123 mapped_len += map_len;
2124 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2125 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2126 }
2127
2128 if (mapped_len < buf_len) {
2129 /* mapped_len == 0, means we should use the first tpd,
2130 which is given by caller */
2131 if (mapped_len == 0)
2132 use_tpd = tpd;
2133 else {
2134 use_tpd = atl1c_get_tpd(adapter, type);
43250ddd
JY		 2135 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2136 }
2137 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2138 buffer_info->length = buf_len - mapped_len;
2139 buffer_info->dma =
2140 pci_map_single(adapter->pdev, skb->data + mapped_len,
2141 buffer_info->length, PCI_DMA_TODEVICE);
ac574804
HX		 2142 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2143 buffer_info->dma)))
2144 goto err_dma;
2145
c6060be4 2146 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
4b45e342
JY		 2147 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2148 ATL1C_PCIMAP_TODEVICE);
43250ddd
JY		 2149 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2150 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2151 }
2152
2153 for (f = 0; f < nr_frags; f++) {
2154 struct skb_frag_struct *frag;
2155
2156 frag = &skb_shinfo(skb)->frags[f];
2157
2158 use_tpd = atl1c_get_tpd(adapter, type);
2159 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2160
2161 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
9e903e08 2162 buffer_info->length = skb_frag_size(frag);
8d1bb865
IC		 2163 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2164 frag, 0,
2165 buffer_info->length,
5d6bcdfe 2166 DMA_TO_DEVICE);
ac574804
HX		 2167 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2168 goto err_dma;
2169
c6060be4 2170 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
4b45e342
JY		 2171 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2172 ATL1C_PCIMAP_TODEVICE);
43250ddd
JY		 2173 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2174 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2175 }
2176
2177 /* The last tpd */
2178 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2179 /* The last buffer info contain the skb address,
2180 so it will be free after unmap */
2181 buffer_info->skb = skb;
ac574804
HX		 2182
2183 return 0;
2184
2185err_dma:
2186 buffer_info->dma = 0;
2187 buffer_info->length = 0;
2188 return -1;
43250ddd
JY		 2189}
2190
2191static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2192 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2193{
2194 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
0af48336 2195 u16 reg;
43250ddd 2196
0af48336
HX		 2197 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2198 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
43250ddd
JY		 2199}
2200
61357325
SH		 2201static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2202 struct net_device *netdev)
43250ddd
JY		 2203{
2204 struct atl1c_adapter *adapter = netdev_priv(netdev);
2205 unsigned long flags;
2206 u16 tpd_req = 1;
2207 struct atl1c_tpd_desc *tpd;
2208 enum atl1c_trans_queue type = atl1c_trans_normal;
2209
2210 if (test_bit(__AT_DOWN, &adapter->flags)) {
2211 dev_kfree_skb_any(skb);
2212 return NETDEV_TX_OK;
2213 }
2214
2215 tpd_req = atl1c_cal_tpd_req(skb);
2216 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2217 if (netif_msg_pktdata(adapter))
2218 dev_info(&adapter->pdev->dev, "tx locked\n");
2219 return NETDEV_TX_LOCKED;
2220 }
43250ddd
JY		 2221
2222 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2223 /* no enough descriptor, just stop queue */
2224 netif_stop_queue(netdev);
2225 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2226 return NETDEV_TX_BUSY;
2227 }
2228
2229 tpd = atl1c_get_tpd(adapter, type);
2230
2231 /* do TSO and check sum */
2232 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2233 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2234 dev_kfree_skb_any(skb);
2235 return NETDEV_TX_OK;
2236 }
2237
df8a39de
JP		 2238 if (unlikely(skb_vlan_tag_present(skb))) {
2239 u16 vlan = skb_vlan_tag_get(skb);
43250ddd
JY		 2240 __le16 tag;
2241
2242 vlan = cpu_to_le16(vlan);
2243 AT_VLAN_TO_TAG(vlan, tag);
2244 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2245 tpd->vlan_tag = tag;
2246 }
2247
2248 if (skb_network_offset(skb) != ETH_HLEN)
2249 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2250
ac574804
HX		 2251 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2252 netif_info(adapter, tx_done, adapter->netdev,
2253 "tx-skb droppted due to dma error\n");
2254 /* roll back tpd/buffer */
2255 atl1c_tx_rollback(adapter, tpd, type);
2256 spin_unlock_irqrestore(&adapter->tx_lock, flags);
07641c8f 2257 dev_kfree_skb_any(skb);
ac574804
HX		 2258 } else {
2259 atl1c_tx_queue(adapter, skb, tpd, type);
2260 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2261 }
43250ddd 2262
43250ddd
JY		 2263 return NETDEV_TX_OK;
2264}
2265
2266static void atl1c_free_irq(struct atl1c_adapter *adapter)
2267{
2268 struct net_device *netdev = adapter->netdev;
2269
2270 free_irq(adapter->pdev->irq, netdev);
2271
2272 if (adapter->have_msi)
2273 pci_disable_msi(adapter->pdev);
2274}
2275
2276static int atl1c_request_irq(struct atl1c_adapter *adapter)
2277{
2278 struct pci_dev *pdev = adapter->pdev;
2279 struct net_device *netdev = adapter->netdev;
2280 int flags = 0;
2281 int err = 0;
2282
2283 adapter->have_msi = true;
2284 err = pci_enable_msi(adapter->pdev);
2285 if (err) {
2286 if (netif_msg_ifup(adapter))
2287 dev_err(&pdev->dev,
2288 "Unable to allocate MSI interrupt Error: %d\n",
2289 err);
2290 adapter->have_msi = false;
93f7fab4 2291 }
43250ddd
JY		 2292
2293 if (!adapter->have_msi)
2294 flags |= IRQF_SHARED;
9aff7e92 2295 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
43250ddd
JY		 2296 netdev->name, netdev);
2297 if (err) {
2298 if (netif_msg_ifup(adapter))
2299 dev_err(&pdev->dev,
2300 "Unable to allocate interrupt Error: %d\n",
2301 err);
2302 if (adapter->have_msi)
2303 pci_disable_msi(adapter->pdev);
2304 return err;
2305 }
2306 if (netif_msg_ifup(adapter))
2307 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2308 return err;
2309}
2310
5e5c0964
HX		 2311
2312static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2313{
2314 /* release tx-pending skbs and reset tx/rx ring index */
2315 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2316 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2317 atl1c_clean_rx_ring(adapter);
2318}
2319
0fb1e54e 2320static int atl1c_up(struct atl1c_adapter *adapter)
43250ddd
JY		 2321{
2322 struct net_device *netdev = adapter->netdev;
43250ddd 2323 int err;
43250ddd
JY		 2324
2325 netif_carrier_off(netdev);
43250ddd 2326
5e5c0964
HX		 2327 err = atl1c_configure(adapter);
2328 if (unlikely(err))
43250ddd 2329 goto err_up;
43250ddd
JY		 2330
2331 err = atl1c_request_irq(adapter);
2332 if (unlikely(err))
2333 goto err_up;
2334
5e5c0964 2335 atl1c_check_link_status(adapter);
43250ddd
JY		 2336 clear_bit(__AT_DOWN, &adapter->flags);
2337 napi_enable(&adapter->napi);
2338 atl1c_irq_enable(adapter);
43250ddd
JY		 2339 netif_start_queue(netdev);
2340 return err;
2341
2342err_up:
43250ddd
JY		 2343 atl1c_clean_rx_ring(adapter);
2344 return err;
2345}
2346
0fb1e54e 2347static void atl1c_down(struct atl1c_adapter *adapter)
43250ddd
JY		 2348{
2349 struct net_device *netdev = adapter->netdev;
2350
2351 atl1c_del_timer(adapter);
cb190546 2352 adapter->work_event = 0; /* clear all event */
43250ddd
JY		 2353 /* signal that we're down so the interrupt handler does not
2354 * reschedule our watchdog timer */
2355 set_bit(__AT_DOWN, &adapter->flags);
2356 netif_carrier_off(netdev);
2357 napi_disable(&adapter->napi);
2358 atl1c_irq_disable(adapter);
2359 atl1c_free_irq(adapter);
024e1e4d
HX		 2360 /* disable ASPM if device inactive */
2361 atl1c_disable_l0s_l1(&adapter->hw);
43250ddd
JY		 2362 /* reset MAC to disable all RX/TX */
2363 atl1c_reset_mac(&adapter->hw);
2364 msleep(1);
2365
2366 adapter->link_speed = SPEED_0;
2367 adapter->link_duplex = -1;
5e5c0964 2368 atl1c_reset_dma_ring(adapter);
43250ddd
JY		 2369}
2370
49ce9c2c 2371/**
43250ddd
JY		 2372 * atl1c_open - Called when a network interface is made active
2373 * @netdev: network interface device structure
2374 *
2375 * Returns 0 on success, negative value on failure
2376 *
2377 * The open entry point is called when a network interface is made
2378 * active by the system (IFF_UP). At this point all resources needed
2379 * for transmit and receive operations are allocated, the interrupt
2380 * handler is registered with the OS, the watchdog timer is started,
2381 * and the stack is notified that the interface is ready.
2382 */
2383static int atl1c_open(struct net_device *netdev)
2384{
2385 struct atl1c_adapter *adapter = netdev_priv(netdev);
2386 int err;
2387
2388 /* disallow open during test */
2389 if (test_bit(__AT_TESTING, &adapter->flags))
2390 return -EBUSY;
2391
2392 /* allocate rx/tx dma buffer & descriptors */
2393 err = atl1c_setup_ring_resources(adapter);
2394 if (unlikely(err))
2395 return err;
2396
2397 err = atl1c_up(adapter);
2398 if (unlikely(err))
2399 goto err_up;
2400
43250ddd
JY		 2401 return 0;
2402
2403err_up:
2404 atl1c_free_irq(adapter);
2405 atl1c_free_ring_resources(adapter);
2406 atl1c_reset_mac(&adapter->hw);
2407 return err;
2408}
2409
49ce9c2c 2410/**
43250ddd
JY		 2411 * atl1c_close - Disables a network interface
2412 * @netdev: network interface device structure
2413 *
2414 * Returns 0, this is not allowed to fail
2415 *
2416 * The close entry point is called when an interface is de-activated
2417 * by the OS. The hardware is still under the drivers control, but
2418 * needs to be disabled. A global MAC reset is issued to stop the
2419 * hardware, and all transmit and receive resources are freed.
2420 */
2421static int atl1c_close(struct net_device *netdev)
2422{
2423 struct atl1c_adapter *adapter = netdev_priv(netdev);
2424
2425 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
0aa76ce3
HX		 2426 set_bit(__AT_DOWN, &adapter->flags);
2427 cancel_work_sync(&adapter->common_task);
43250ddd
JY		 2428 atl1c_down(adapter);
2429 atl1c_free_ring_resources(adapter);
2430 return 0;
2431}
2432
762e3023 2433static int atl1c_suspend(struct device *dev)
43250ddd 2434{
762e3023 2435 struct pci_dev *pdev = to_pci_dev(dev);
43250ddd
JY		 2436 struct net_device *netdev = pci_get_drvdata(pdev);
2437 struct atl1c_adapter *adapter = netdev_priv(netdev);
2438 struct atl1c_hw *hw = &adapter->hw;
43250ddd 2439 u32 wufc = adapter->wol;
43250ddd 2440
8f574b35 2441 atl1c_disable_l0s_l1(hw);
43250ddd
JY		 2442 if (netif_running(netdev)) {
2443 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2444 atl1c_down(adapter);
2445 }
2446 netif_device_detach(netdev);
8f574b35
JY		 2447
2448 if (wufc)
319d013a 2449 if (atl1c_phy_to_ps_link(hw) != 0)
8f574b35
JY		 2450 dev_dbg(&pdev->dev, "phy power saving failed");
2451
319d013a 2452 atl1c_power_saving(hw, wufc);
ce5b972b 2453
43250ddd
JY		 2454 return 0;
2455}
2456
d187c1aa 2457#ifdef CONFIG_PM_SLEEP
762e3023 2458static int atl1c_resume(struct device *dev)
43250ddd 2459{
762e3023 2460 struct pci_dev *pdev = to_pci_dev(dev);
43250ddd
JY		 2461 struct net_device *netdev = pci_get_drvdata(pdev);
2462 struct atl1c_adapter *adapter = netdev_priv(netdev);
2463
43250ddd 2464 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
ce3ba0c9 2465 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
43250ddd
JY		 2466
2467 atl1c_phy_reset(&adapter->hw);
2468 atl1c_reset_mac(&adapter->hw);
8f574b35
JY		 2469 atl1c_phy_init(&adapter->hw);
2470
2471#if 0
2472 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2473 pm_data &= ~PM_CTRLSTAT_PME_EN;
2474 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2475#endif
2476
43250ddd
JY		 2477 netif_device_attach(netdev);
2478 if (netif_running(netdev))
2479 atl1c_up(adapter);
2480
2481 return 0;
2482}
d187c1aa 2483#endif
43250ddd
JY		 2484
2485static void atl1c_shutdown(struct pci_dev *pdev)
2486{
762e3023
RW		 2487 struct net_device *netdev = pci_get_drvdata(pdev);
2488 struct atl1c_adapter *adapter = netdev_priv(netdev);
2489
2490 atl1c_suspend(&pdev->dev);
2491 pci_wake_from_d3(pdev, adapter->wol);
2492 pci_set_power_state(pdev, PCI_D3hot);
43250ddd
JY		 2493}
2494
2495static const struct net_device_ops atl1c_netdev_ops = {
2496 .ndo_open = atl1c_open,
2497 .ndo_stop = atl1c_close,
2498 .ndo_validate_addr = eth_validate_addr,
2499 .ndo_start_xmit = atl1c_xmit_frame,
46facce9 2500 .ndo_set_mac_address = atl1c_set_mac_addr,
afc4b13d 2501 .ndo_set_rx_mode = atl1c_set_multi,
43250ddd 2502 .ndo_change_mtu = atl1c_change_mtu,
782d640a 2503 .ndo_fix_features = atl1c_fix_features,
46facce9 2504 .ndo_set_features = atl1c_set_features,
43250ddd
JY		 2505 .ndo_do_ioctl = atl1c_ioctl,
2506 .ndo_tx_timeout = atl1c_tx_timeout,
2507 .ndo_get_stats = atl1c_get_stats,
43250ddd
JY		 2508#ifdef CONFIG_NET_POLL_CONTROLLER
2509 .ndo_poll_controller = atl1c_netpoll,
2510#endif
2511};
2512
2513static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2514{
2515 SET_NETDEV_DEV(netdev, &pdev->dev);
2516 pci_set_drvdata(pdev, netdev);
2517
43250ddd
JY		 2518 netdev->netdev_ops = &atl1c_netdev_ops;
2519 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2520 atl1c_set_ethtool_ops(netdev);
2521
2522 /* TODO: add when ready */
f646968f
PM		 2523 netdev->hw_features = NETIF_F_SG |
2524 NETIF_F_HW_CSUM |
2525 NETIF_F_HW_VLAN_CTAG_RX |
2526 NETIF_F_TSO |
43250ddd 2527 NETIF_F_TSO6;
f646968f
PM		 2528 netdev->features = netdev->hw_features |
2529 NETIF_F_HW_VLAN_CTAG_TX;
43250ddd
JY		 2530 return 0;
2531}
2532
49ce9c2c 2533/**
43250ddd
JY		 2534 * atl1c_probe - Device Initialization Routine
2535 * @pdev: PCI device information struct
2536 * @ent: entry in atl1c_pci_tbl
2537 *
2538 * Returns 0 on success, negative on failure
2539 *
2540 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2541 * The OS initialization, configuring of the adapter private structure,
2542 * and a hardware reset occur.
2543 */
1dd06ae8 2544static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
43250ddd
JY		 2545{
2546 struct net_device *netdev;
2547 struct atl1c_adapter *adapter;
2548 static int cards_found;
2549
2550 int err = 0;
2551
2552 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2553 err = pci_enable_device_mem(pdev);
2554 if (err) {
2555 dev_err(&pdev->dev, "cannot enable PCI device\n");
2556 return err;
2557 }
2558
2559 /*
2560 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2561 * shared register for the high 32 bits, so only a single, aligned,
2562 * 4 GB physical address range can be used at a time.
2563 *
2564 * Supporting 64-bit DMA on this hardware is more trouble than it's
2565 * worth. It is far easier to limit to 32-bit DMA than update
2566 * various kernel subsystems to support the mechanics required by a
2567 * fixed-high-32-bit system.
2568 */
e930438c
YH		 2569 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2570 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
43250ddd
JY		 2571 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2572 goto err_dma;
2573 }
2574
2575 err = pci_request_regions(pdev, atl1c_driver_name);
2576 if (err) {
2577 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2578 goto err_pci_reg;
2579 }
2580
2581 pci_set_master(pdev);
2582
2583 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2584 if (netdev == NULL) {
2585 err = -ENOMEM;
43250ddd
JY		 2586 goto err_alloc_etherdev;
2587 }
2588
2589 err = atl1c_init_netdev(netdev, pdev);
2590 if (err) {
2591 dev_err(&pdev->dev, "init netdevice failed\n");
2592 goto err_init_netdev;
2593 }
2594 adapter = netdev_priv(netdev);
2595 adapter->bd_number = cards_found;
2596 adapter->netdev = netdev;
2597 adapter->pdev = pdev;
2598 adapter->hw.adapter = adapter;
2599 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2600 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2601 if (!adapter->hw.hw_addr) {
2602 err = -EIO;
2603 dev_err(&pdev->dev, "cannot map device registers\n");
2604 goto err_ioremap;
2605 }
43250ddd
JY		 2606
2607 /* init mii data */
2608 adapter->mii.dev = netdev;
2609 adapter->mii.mdio_read = atl1c_mdio_read;
2610 adapter->mii.mdio_write = atl1c_mdio_write;
2611 adapter->mii.phy_id_mask = 0x1f;
929a5e93 2612 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
43250ddd
JY		 2613 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2614 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2615 (unsigned long)adapter);
2616 /* setup the private structure */
2617 err = atl1c_sw_init(adapter);
2618 if (err) {
2619 dev_err(&pdev->dev, "net device private data init failed\n");
2620 goto err_sw_init;
2621 }
ce3ba0c9 2622 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
43250ddd
JY		 2623
2624 /* Init GPHY as early as possible due to power saving issue */
2625 atl1c_phy_reset(&adapter->hw);
2626
2627 err = atl1c_reset_mac(&adapter->hw);
2628 if (err) {
2629 err = -EIO;
2630 goto err_reset;
2631 }
2632
43250ddd
JY		 2633 /* reset the controller to
2634 * put the device in a known good starting state */
2635 err = atl1c_phy_init(&adapter->hw);
2636 if (err) {
2637 err = -EIO;
2638 goto err_reset;
2639 }
6a214fd4
DK		 2640 if (atl1c_read_mac_addr(&adapter->hw)) {
2641 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
e41b2d7f 2642 netdev->addr_assign_type = NET_ADDR_RANDOM;
43250ddd
JY		 2643 }
2644 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
43250ddd 2645 if (netif_msg_probe(adapter))
82991172 2646 dev_dbg(&pdev->dev, "mac address : %pM\n",
2647 adapter->hw.mac_addr);
43250ddd 2648
229e6b6e 2649 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
cb190546
JY		 2650 INIT_WORK(&adapter->common_task, atl1c_common_task);
2651 adapter->work_event = 0;
43250ddd
JY		 2652 err = register_netdev(netdev);
2653 if (err) {
2654 dev_err(&pdev->dev, "register netdevice failed\n");
2655 goto err_register;
2656 }
2657
2658 if (netif_msg_probe(adapter))
2659 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2660 cards_found++;
2661 return 0;
2662
2663err_reset:
2664err_register:
2665err_sw_init:
43250ddd
JY		 2666 iounmap(adapter->hw.hw_addr);
2667err_init_netdev:
2668err_ioremap:
2669 free_netdev(netdev);
2670err_alloc_etherdev:
2671 pci_release_regions(pdev);
2672err_pci_reg:
2673err_dma:
2674 pci_disable_device(pdev);
2675 return err;
2676}
2677
49ce9c2c 2678/**
43250ddd
JY		 2679 * atl1c_remove - Device Removal Routine
2680 * @pdev: PCI device information struct
2681 *
2682 * atl1c_remove is called by the PCI subsystem to alert the driver
2683 * that it should release a PCI device. The could be caused by a
2684 * Hot-Plug event, or because the driver is going to be removed from
2685 * memory.
2686 */
093d369d 2687static void atl1c_remove(struct pci_dev *pdev)
43250ddd
JY		 2688{
2689 struct net_device *netdev = pci_get_drvdata(pdev);
2690 struct atl1c_adapter *adapter = netdev_priv(netdev);
2691
2692 unregister_netdev(netdev);
229e6b6e
HX		 2693 /* restore permanent address */
2694 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
43250ddd
JY		 2695 atl1c_phy_disable(&adapter->hw);
2696
2697 iounmap(adapter->hw.hw_addr);
2698
2699 pci_release_regions(pdev);
2700 pci_disable_device(pdev);
2701 free_netdev(netdev);
2702}
2703
49ce9c2c 2704/**
43250ddd
JY		 2705 * atl1c_io_error_detected - called when PCI error is detected
2706 * @pdev: Pointer to PCI device
2707 * @state: The current pci connection state
2708 *
2709 * This function is called after a PCI bus error affecting
2710 * this device has been detected.
2711 */
2712static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2713 pci_channel_state_t state)
2714{
2715 struct net_device *netdev = pci_get_drvdata(pdev);
2716 struct atl1c_adapter *adapter = netdev_priv(netdev);
2717
2718 netif_device_detach(netdev);
2719
005fb4f0
DN		 2720 if (state == pci_channel_io_perm_failure)
2721 return PCI_ERS_RESULT_DISCONNECT;
2722
43250ddd
JY		 2723 if (netif_running(netdev))
2724 atl1c_down(adapter);
2725
2726 pci_disable_device(pdev);
2727
2728 /* Request a slot slot reset. */
2729 return PCI_ERS_RESULT_NEED_RESET;
2730}
2731
49ce9c2c 2732/**
43250ddd
JY		 2733 * atl1c_io_slot_reset - called after the pci bus has been reset.
2734 * @pdev: Pointer to PCI device
2735 *
2736 * Restart the card from scratch, as if from a cold-boot. Implementation
2737 * resembles the first-half of the e1000_resume routine.
2738 */
2739static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2740{
2741 struct net_device *netdev = pci_get_drvdata(pdev);
2742 struct atl1c_adapter *adapter = netdev_priv(netdev);
2743
2744 if (pci_enable_device(pdev)) {
2745 if (netif_msg_hw(adapter))
2746 dev_err(&pdev->dev,
2747 "Cannot re-enable PCI device after reset\n");
2748 return PCI_ERS_RESULT_DISCONNECT;
2749 }
2750 pci_set_master(pdev);
2751
2752 pci_enable_wake(pdev, PCI_D3hot, 0);
2753 pci_enable_wake(pdev, PCI_D3cold, 0);
2754
2755 atl1c_reset_mac(&adapter->hw);
2756
2757 return PCI_ERS_RESULT_RECOVERED;
2758}
2759
49ce9c2c 2760/**
43250ddd
JY		 2761 * atl1c_io_resume - called when traffic can start flowing again.
2762 * @pdev: Pointer to PCI device
2763 *
2764 * This callback is called when the error recovery driver tells us that
2765 * its OK to resume normal operation. Implementation resembles the
2766 * second-half of the atl1c_resume routine.
2767 */
2768static void atl1c_io_resume(struct pci_dev *pdev)
2769{
2770 struct net_device *netdev = pci_get_drvdata(pdev);
2771 struct atl1c_adapter *adapter = netdev_priv(netdev);
2772
2773 if (netif_running(netdev)) {
2774 if (atl1c_up(adapter)) {
2775 if (netif_msg_hw(adapter))
2776 dev_err(&pdev->dev,
2777 "Cannot bring device back up after reset\n");
2778 return;
2779 }
2780 }
2781
2782 netif_device_attach(netdev);
2783}
2784
3646f0e5 2785static const struct pci_error_handlers atl1c_err_handler = {
43250ddd
JY		 2786 .error_detected = atl1c_io_error_detected,
2787 .slot_reset = atl1c_io_slot_reset,
2788 .resume = atl1c_io_resume,
2789};
2790
762e3023
RW		 2791static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2792
43250ddd
JY		 2793static struct pci_driver atl1c_driver = {
2794 .name = atl1c_driver_name,
2795 .id_table = atl1c_pci_tbl,
2796 .probe = atl1c_probe,
093d369d 2797 .remove = atl1c_remove,
43250ddd 2798 .shutdown = atl1c_shutdown,
762e3023
RW		 2799 .err_handler = &atl1c_err_handler,
2800 .driver.pm = &atl1c_pm_ops,
43250ddd
JY		 2801};
2802
2c21d6c9 2803module_pci_driver(atl1c_driver);
Linux kernel - Deliverables
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