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1/*******************************************************************************
2
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "e1000.h"
30#include <net/ip6_checksum.h>
31#include <linux/io.h>
32#include <linux/prefetch.h>
33#include <linux/bitops.h>
34#include <linux/if_vlan.h>
35
36/* Intel Media SOC GbE MDIO physical base address */
37static unsigned long ce4100_gbe_mdio_base_phy;
38/* Intel Media SOC GbE MDIO virtual base address */
39void __iomem *ce4100_gbe_mdio_base_virt;
40
41char e1000_driver_name[] = "e1000";
42static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
43#define DRV_VERSION "7.3.21-k8-NAPI"
44const char e1000_driver_version[] = DRV_VERSION;
45static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
46
47/* e1000_pci_tbl - PCI Device ID Table
48 *
49 * Last entry must be all 0s
50 *
51 * Macro expands to...
52 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
53 */
54static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
55 INTEL_E1000_ETHERNET_DEVICE(0x1000),
56 INTEL_E1000_ETHERNET_DEVICE(0x1001),
57 INTEL_E1000_ETHERNET_DEVICE(0x1004),
58 INTEL_E1000_ETHERNET_DEVICE(0x1008),
59 INTEL_E1000_ETHERNET_DEVICE(0x1009),
60 INTEL_E1000_ETHERNET_DEVICE(0x100C),
61 INTEL_E1000_ETHERNET_DEVICE(0x100D),
62 INTEL_E1000_ETHERNET_DEVICE(0x100E),
63 INTEL_E1000_ETHERNET_DEVICE(0x100F),
64 INTEL_E1000_ETHERNET_DEVICE(0x1010),
65 INTEL_E1000_ETHERNET_DEVICE(0x1011),
66 INTEL_E1000_ETHERNET_DEVICE(0x1012),
67 INTEL_E1000_ETHERNET_DEVICE(0x1013),
68 INTEL_E1000_ETHERNET_DEVICE(0x1014),
69 INTEL_E1000_ETHERNET_DEVICE(0x1015),
70 INTEL_E1000_ETHERNET_DEVICE(0x1016),
71 INTEL_E1000_ETHERNET_DEVICE(0x1017),
72 INTEL_E1000_ETHERNET_DEVICE(0x1018),
73 INTEL_E1000_ETHERNET_DEVICE(0x1019),
74 INTEL_E1000_ETHERNET_DEVICE(0x101A),
75 INTEL_E1000_ETHERNET_DEVICE(0x101D),
76 INTEL_E1000_ETHERNET_DEVICE(0x101E),
77 INTEL_E1000_ETHERNET_DEVICE(0x1026),
78 INTEL_E1000_ETHERNET_DEVICE(0x1027),
79 INTEL_E1000_ETHERNET_DEVICE(0x1028),
80 INTEL_E1000_ETHERNET_DEVICE(0x1075),
81 INTEL_E1000_ETHERNET_DEVICE(0x1076),
82 INTEL_E1000_ETHERNET_DEVICE(0x1077),
83 INTEL_E1000_ETHERNET_DEVICE(0x1078),
84 INTEL_E1000_ETHERNET_DEVICE(0x1079),
85 INTEL_E1000_ETHERNET_DEVICE(0x107A),
86 INTEL_E1000_ETHERNET_DEVICE(0x107B),
87 INTEL_E1000_ETHERNET_DEVICE(0x107C),
88 INTEL_E1000_ETHERNET_DEVICE(0x108A),
89 INTEL_E1000_ETHERNET_DEVICE(0x1099),
90 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
91 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
92 /* required last entry */
93 {0,}
94};
95
96MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
97
98int e1000_up(struct e1000_adapter *adapter);
99void e1000_down(struct e1000_adapter *adapter);
100void e1000_reinit_locked(struct e1000_adapter *adapter);
101void e1000_reset(struct e1000_adapter *adapter);
102int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
103int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
104void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
105void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
106static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
107 struct e1000_tx_ring *txdr);
108static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
109 struct e1000_rx_ring *rxdr);
110static void e1000_free_tx_resources(struct e1000_adapter *adapter,
111 struct e1000_tx_ring *tx_ring);
112static void e1000_free_rx_resources(struct e1000_adapter *adapter,
113 struct e1000_rx_ring *rx_ring);
114void e1000_update_stats(struct e1000_adapter *adapter);
115
116static int e1000_init_module(void);
117static void e1000_exit_module(void);
118static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
119static void __devexit e1000_remove(struct pci_dev *pdev);
120static int e1000_alloc_queues(struct e1000_adapter *adapter);
121static int e1000_sw_init(struct e1000_adapter *adapter);
122static int e1000_open(struct net_device *netdev);
123static int e1000_close(struct net_device *netdev);
124static void e1000_configure_tx(struct e1000_adapter *adapter);
125static void e1000_configure_rx(struct e1000_adapter *adapter);
126static void e1000_setup_rctl(struct e1000_adapter *adapter);
127static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
128static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
129static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
130 struct e1000_tx_ring *tx_ring);
131static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
132 struct e1000_rx_ring *rx_ring);
133static void e1000_set_rx_mode(struct net_device *netdev);
134static void e1000_update_phy_info(unsigned long data);
135static void e1000_update_phy_info_task(struct work_struct *work);
136static void e1000_watchdog(unsigned long data);
137static void e1000_82547_tx_fifo_stall(unsigned long data);
138static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
139static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
140 struct net_device *netdev);
141static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
142static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
143static int e1000_set_mac(struct net_device *netdev, void *p);
144static irqreturn_t e1000_intr(int irq, void *data);
145static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
146 struct e1000_tx_ring *tx_ring);
147static int e1000_clean(struct napi_struct *napi, int budget);
148static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
149 struct e1000_rx_ring *rx_ring,
150 int *work_done, int work_to_do);
151static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
152 struct e1000_rx_ring *rx_ring,
153 int *work_done, int work_to_do);
154static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
155 struct e1000_rx_ring *rx_ring,
156 int cleaned_count);
157static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
158 struct e1000_rx_ring *rx_ring,
159 int cleaned_count);
160static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
161static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
162 int cmd);
163static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
164static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
165static void e1000_tx_timeout(struct net_device *dev);
166static void e1000_reset_task(struct work_struct *work);
167static void e1000_smartspeed(struct e1000_adapter *adapter);
168static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
169 struct sk_buff *skb);
170
171static bool e1000_vlan_used(struct e1000_adapter *adapter);
172static void e1000_vlan_mode(struct net_device *netdev, u32 features);
173static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
174static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
175static void e1000_restore_vlan(struct e1000_adapter *adapter);
176
177#ifdef CONFIG_PM
178static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
179static int e1000_resume(struct pci_dev *pdev);
180#endif
181static void e1000_shutdown(struct pci_dev *pdev);
182
183#ifdef CONFIG_NET_POLL_CONTROLLER
184/* for netdump / net console */
185static void e1000_netpoll (struct net_device *netdev);
186#endif
187
188#define COPYBREAK_DEFAULT 256
189static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
190module_param(copybreak, uint, 0644);
191MODULE_PARM_DESC(copybreak,
192 "Maximum size of packet that is copied to a new buffer on receive");
193
194static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
195 pci_channel_state_t state);
196static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
197static void e1000_io_resume(struct pci_dev *pdev);
198
199static struct pci_error_handlers e1000_err_handler = {
200 .error_detected = e1000_io_error_detected,
201 .slot_reset = e1000_io_slot_reset,
202 .resume = e1000_io_resume,
203};
204
205static struct pci_driver e1000_driver = {
206 .name = e1000_driver_name,
207 .id_table = e1000_pci_tbl,
208 .probe = e1000_probe,
209 .remove = __devexit_p(e1000_remove),
210#ifdef CONFIG_PM
211 /* Power Management Hooks */
212 .suspend = e1000_suspend,
213 .resume = e1000_resume,
214#endif
215 .shutdown = e1000_shutdown,
216 .err_handler = &e1000_err_handler
217};
218
219MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
220MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
221MODULE_LICENSE("GPL");
222MODULE_VERSION(DRV_VERSION);
223
224static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
225module_param(debug, int, 0);
226MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
227
228/**
229 * e1000_get_hw_dev - return device
230 * used by hardware layer to print debugging information
231 *
232 **/
233struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
234{
235 struct e1000_adapter *adapter = hw->back;
236 return adapter->netdev;
237}
238
239/**
240 * e1000_init_module - Driver Registration Routine
241 *
242 * e1000_init_module is the first routine called when the driver is
243 * loaded. All it does is register with the PCI subsystem.
244 **/
245
246static int __init e1000_init_module(void)
247{
248 int ret;
249 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
250
251 pr_info("%s\n", e1000_copyright);
252
253 ret = pci_register_driver(&e1000_driver);
254 if (copybreak != COPYBREAK_DEFAULT) {
255 if (copybreak == 0)
256 pr_info("copybreak disabled\n");
257 else
258 pr_info("copybreak enabled for "
259 "packets <= %u bytes\n", copybreak);
260 }
261 return ret;
262}
263
264module_init(e1000_init_module);
265
266/**
267 * e1000_exit_module - Driver Exit Cleanup Routine
268 *
269 * e1000_exit_module is called just before the driver is removed
270 * from memory.
271 **/
272
273static void __exit e1000_exit_module(void)
274{
275 pci_unregister_driver(&e1000_driver);
276}
277
278module_exit(e1000_exit_module);
279
280static int e1000_request_irq(struct e1000_adapter *adapter)
281{
282 struct net_device *netdev = adapter->netdev;
283 irq_handler_t handler = e1000_intr;
284 int irq_flags = IRQF_SHARED;
285 int err;
286
287 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
288 netdev);
289 if (err) {
290 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
291 }
292
293 return err;
294}
295
296static void e1000_free_irq(struct e1000_adapter *adapter)
297{
298 struct net_device *netdev = adapter->netdev;
299
300 free_irq(adapter->pdev->irq, netdev);
301}
302
303/**
304 * e1000_irq_disable - Mask off interrupt generation on the NIC
305 * @adapter: board private structure
306 **/
307
308static void e1000_irq_disable(struct e1000_adapter *adapter)
309{
310 struct e1000_hw *hw = &adapter->hw;
311
312 ew32(IMC, ~0);
313 E1000_WRITE_FLUSH();
314 synchronize_irq(adapter->pdev->irq);
315}
316
317/**
318 * e1000_irq_enable - Enable default interrupt generation settings
319 * @adapter: board private structure
320 **/
321
322static void e1000_irq_enable(struct e1000_adapter *adapter)
323{
324 struct e1000_hw *hw = &adapter->hw;
325
326 ew32(IMS, IMS_ENABLE_MASK);
327 E1000_WRITE_FLUSH();
328}
329
330static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
331{
332 struct e1000_hw *hw = &adapter->hw;
333 struct net_device *netdev = adapter->netdev;
334 u16 vid = hw->mng_cookie.vlan_id;
335 u16 old_vid = adapter->mng_vlan_id;
336
337 if (!e1000_vlan_used(adapter))
338 return;
339
340 if (!test_bit(vid, adapter->active_vlans)) {
341 if (hw->mng_cookie.status &
342 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
343 e1000_vlan_rx_add_vid(netdev, vid);
344 adapter->mng_vlan_id = vid;
345 } else {
346 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
347 }
348 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
349 (vid != old_vid) &&
350 !test_bit(old_vid, adapter->active_vlans))
351 e1000_vlan_rx_kill_vid(netdev, old_vid);
352 } else {
353 adapter->mng_vlan_id = vid;
354 }
355}
356
357static void e1000_init_manageability(struct e1000_adapter *adapter)
358{
359 struct e1000_hw *hw = &adapter->hw;
360
361 if (adapter->en_mng_pt) {
362 u32 manc = er32(MANC);
363
364 /* disable hardware interception of ARP */
365 manc &= ~(E1000_MANC_ARP_EN);
366
367 ew32(MANC, manc);
368 }
369}
370
371static void e1000_release_manageability(struct e1000_adapter *adapter)
372{
373 struct e1000_hw *hw = &adapter->hw;
374
375 if (adapter->en_mng_pt) {
376 u32 manc = er32(MANC);
377
378 /* re-enable hardware interception of ARP */
379 manc |= E1000_MANC_ARP_EN;
380
381 ew32(MANC, manc);
382 }
383}
384
385/**
386 * e1000_configure - configure the hardware for RX and TX
387 * @adapter = private board structure
388 **/
389static void e1000_configure(struct e1000_adapter *adapter)
390{
391 struct net_device *netdev = adapter->netdev;
392 int i;
393
394 e1000_set_rx_mode(netdev);
395
396 e1000_restore_vlan(adapter);
397 e1000_init_manageability(adapter);
398
399 e1000_configure_tx(adapter);
400 e1000_setup_rctl(adapter);
401 e1000_configure_rx(adapter);
402 /* call E1000_DESC_UNUSED which always leaves
403 * at least 1 descriptor unused to make sure
404 * next_to_use != next_to_clean */
405 for (i = 0; i < adapter->num_rx_queues; i++) {
406 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
407 adapter->alloc_rx_buf(adapter, ring,
408 E1000_DESC_UNUSED(ring));
409 }
410}
411
412int e1000_up(struct e1000_adapter *adapter)
413{
414 struct e1000_hw *hw = &adapter->hw;
415
416 /* hardware has been reset, we need to reload some things */
417 e1000_configure(adapter);
418
419 clear_bit(__E1000_DOWN, &adapter->flags);
420
421 napi_enable(&adapter->napi);
422
423 e1000_irq_enable(adapter);
424
425 netif_wake_queue(adapter->netdev);
426
427 /* fire a link change interrupt to start the watchdog */
428 ew32(ICS, E1000_ICS_LSC);
429 return 0;
430}
431
432/**
433 * e1000_power_up_phy - restore link in case the phy was powered down
434 * @adapter: address of board private structure
435 *
436 * The phy may be powered down to save power and turn off link when the
437 * driver is unloaded and wake on lan is not enabled (among others)
438 * *** this routine MUST be followed by a call to e1000_reset ***
439 *
440 **/
441
442void e1000_power_up_phy(struct e1000_adapter *adapter)
443{
444 struct e1000_hw *hw = &adapter->hw;
445 u16 mii_reg = 0;
446
447 /* Just clear the power down bit to wake the phy back up */
448 if (hw->media_type == e1000_media_type_copper) {
449 /* according to the manual, the phy will retain its
450 * settings across a power-down/up cycle */
451 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
452 mii_reg &= ~MII_CR_POWER_DOWN;
453 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
454 }
455}
456
457static void e1000_power_down_phy(struct e1000_adapter *adapter)
458{
459 struct e1000_hw *hw = &adapter->hw;
460
461 /* Power down the PHY so no link is implied when interface is down *
462 * The PHY cannot be powered down if any of the following is true *
463 * (a) WoL is enabled
464 * (b) AMT is active
465 * (c) SoL/IDER session is active */
466 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
467 hw->media_type == e1000_media_type_copper) {
468 u16 mii_reg = 0;
469
470 switch (hw->mac_type) {
471 case e1000_82540:
472 case e1000_82545:
473 case e1000_82545_rev_3:
474 case e1000_82546:
475 case e1000_ce4100:
476 case e1000_82546_rev_3:
477 case e1000_82541:
478 case e1000_82541_rev_2:
479 case e1000_82547:
480 case e1000_82547_rev_2:
481 if (er32(MANC) & E1000_MANC_SMBUS_EN)
482 goto out;
483 break;
484 default:
485 goto out;
486 }
487 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
488 mii_reg |= MII_CR_POWER_DOWN;
489 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
490 mdelay(1);
491 }
492out:
493 return;
494}
495
496void e1000_down(struct e1000_adapter *adapter)
497{
498 struct e1000_hw *hw = &adapter->hw;
499 struct net_device *netdev = adapter->netdev;
500 u32 rctl, tctl;
501
502
503 /* disable receives in the hardware */
504 rctl = er32(RCTL);
505 ew32(RCTL, rctl & ~E1000_RCTL_EN);
506 /* flush and sleep below */
507
508 netif_tx_disable(netdev);
509
510 /* disable transmits in the hardware */
511 tctl = er32(TCTL);
512 tctl &= ~E1000_TCTL_EN;
513 ew32(TCTL, tctl);
514 /* flush both disables and wait for them to finish */
515 E1000_WRITE_FLUSH();
516 msleep(10);
517
518 napi_disable(&adapter->napi);
519
520 e1000_irq_disable(adapter);
521
522 /*
523 * Setting DOWN must be after irq_disable to prevent
524 * a screaming interrupt. Setting DOWN also prevents
525 * timers and tasks from rescheduling.
526 */
527 set_bit(__E1000_DOWN, &adapter->flags);
528
529 del_timer_sync(&adapter->tx_fifo_stall_timer);
530 del_timer_sync(&adapter->watchdog_timer);
531 del_timer_sync(&adapter->phy_info_timer);
532
533 adapter->link_speed = 0;
534 adapter->link_duplex = 0;
535 netif_carrier_off(netdev);
536
537 e1000_reset(adapter);
538 e1000_clean_all_tx_rings(adapter);
539 e1000_clean_all_rx_rings(adapter);
540}
541
542static void e1000_reinit_safe(struct e1000_adapter *adapter)
543{
544 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
545 msleep(1);
546 rtnl_lock();
547 e1000_down(adapter);
548 e1000_up(adapter);
549 rtnl_unlock();
550 clear_bit(__E1000_RESETTING, &adapter->flags);
551}
552
553void e1000_reinit_locked(struct e1000_adapter *adapter)
554{
555 /* if rtnl_lock is not held the call path is bogus */
556 ASSERT_RTNL();
557 WARN_ON(in_interrupt());
558 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
559 msleep(1);
560 e1000_down(adapter);
561 e1000_up(adapter);
562 clear_bit(__E1000_RESETTING, &adapter->flags);
563}
564
565void e1000_reset(struct e1000_adapter *adapter)
566{
567 struct e1000_hw *hw = &adapter->hw;
568 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
569 bool legacy_pba_adjust = false;
570 u16 hwm;
571
572 /* Repartition Pba for greater than 9k mtu
573 * To take effect CTRL.RST is required.
574 */
575
576 switch (hw->mac_type) {
577 case e1000_82542_rev2_0:
578 case e1000_82542_rev2_1:
579 case e1000_82543:
580 case e1000_82544:
581 case e1000_82540:
582 case e1000_82541:
583 case e1000_82541_rev_2:
584 legacy_pba_adjust = true;
585 pba = E1000_PBA_48K;
586 break;
587 case e1000_82545:
588 case e1000_82545_rev_3:
589 case e1000_82546:
590 case e1000_ce4100:
591 case e1000_82546_rev_3:
592 pba = E1000_PBA_48K;
593 break;
594 case e1000_82547:
595 case e1000_82547_rev_2:
596 legacy_pba_adjust = true;
597 pba = E1000_PBA_30K;
598 break;
599 case e1000_undefined:
600 case e1000_num_macs:
601 break;
602 }
603
604 if (legacy_pba_adjust) {
605 if (hw->max_frame_size > E1000_RXBUFFER_8192)
606 pba -= 8; /* allocate more FIFO for Tx */
607
608 if (hw->mac_type == e1000_82547) {
609 adapter->tx_fifo_head = 0;
610 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
611 adapter->tx_fifo_size =
612 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
613 atomic_set(&adapter->tx_fifo_stall, 0);
614 }
615 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
616 /* adjust PBA for jumbo frames */
617 ew32(PBA, pba);
618
619 /* To maintain wire speed transmits, the Tx FIFO should be
620 * large enough to accommodate two full transmit packets,
621 * rounded up to the next 1KB and expressed in KB. Likewise,
622 * the Rx FIFO should be large enough to accommodate at least
623 * one full receive packet and is similarly rounded up and
624 * expressed in KB. */
625 pba = er32(PBA);
626 /* upper 16 bits has Tx packet buffer allocation size in KB */
627 tx_space = pba >> 16;
628 /* lower 16 bits has Rx packet buffer allocation size in KB */
629 pba &= 0xffff;
630 /*
631 * the tx fifo also stores 16 bytes of information about the tx
632 * but don't include ethernet FCS because hardware appends it
633 */
634 min_tx_space = (hw->max_frame_size +
635 sizeof(struct e1000_tx_desc) -
636 ETH_FCS_LEN) * 2;
637 min_tx_space = ALIGN(min_tx_space, 1024);
638 min_tx_space >>= 10;
639 /* software strips receive CRC, so leave room for it */
640 min_rx_space = hw->max_frame_size;
641 min_rx_space = ALIGN(min_rx_space, 1024);
642 min_rx_space >>= 10;
643
644 /* If current Tx allocation is less than the min Tx FIFO size,
645 * and the min Tx FIFO size is less than the current Rx FIFO
646 * allocation, take space away from current Rx allocation */
647 if (tx_space < min_tx_space &&
648 ((min_tx_space - tx_space) < pba)) {
649 pba = pba - (min_tx_space - tx_space);
650
651 /* PCI/PCIx hardware has PBA alignment constraints */
652 switch (hw->mac_type) {
653 case e1000_82545 ... e1000_82546_rev_3:
654 pba &= ~(E1000_PBA_8K - 1);
655 break;
656 default:
657 break;
658 }
659
660 /* if short on rx space, rx wins and must trump tx
661 * adjustment or use Early Receive if available */
662 if (pba < min_rx_space)
663 pba = min_rx_space;
664 }
665 }
666
667 ew32(PBA, pba);
668
669 /*
670 * flow control settings:
671 * The high water mark must be low enough to fit one full frame
672 * (or the size used for early receive) above it in the Rx FIFO.
673 * Set it to the lower of:
674 * - 90% of the Rx FIFO size, and
675 * - the full Rx FIFO size minus the early receive size (for parts
676 * with ERT support assuming ERT set to E1000_ERT_2048), or
677 * - the full Rx FIFO size minus one full frame
678 */
679 hwm = min(((pba << 10) * 9 / 10),
680 ((pba << 10) - hw->max_frame_size));
681
682 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
683 hw->fc_low_water = hw->fc_high_water - 8;
684 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
685 hw->fc_send_xon = 1;
686 hw->fc = hw->original_fc;
687
688 /* Allow time for pending master requests to run */
689 e1000_reset_hw(hw);
690 if (hw->mac_type >= e1000_82544)
691 ew32(WUC, 0);
692
693 if (e1000_init_hw(hw))
694 e_dev_err("Hardware Error\n");
695 e1000_update_mng_vlan(adapter);
696
697 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
698 if (hw->mac_type >= e1000_82544 &&
699 hw->autoneg == 1 &&
700 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
701 u32 ctrl = er32(CTRL);
702 /* clear phy power management bit if we are in gig only mode,
703 * which if enabled will attempt negotiation to 100Mb, which
704 * can cause a loss of link at power off or driver unload */
705 ctrl &= ~E1000_CTRL_SWDPIN3;
706 ew32(CTRL, ctrl);
707 }
708
709 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
710 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
711
712 e1000_reset_adaptive(hw);
713 e1000_phy_get_info(hw, &adapter->phy_info);
714
715 e1000_release_manageability(adapter);
716}
717
718/**
719 * Dump the eeprom for users having checksum issues
720 **/
721static void e1000_dump_eeprom(struct e1000_adapter *adapter)
722{
723 struct net_device *netdev = adapter->netdev;
724 struct ethtool_eeprom eeprom;
725 const struct ethtool_ops *ops = netdev->ethtool_ops;
726 u8 *data;
727 int i;
728 u16 csum_old, csum_new = 0;
729
730 eeprom.len = ops->get_eeprom_len(netdev);
731 eeprom.offset = 0;
732
733 data = kmalloc(eeprom.len, GFP_KERNEL);
734 if (!data) {
735 pr_err("Unable to allocate memory to dump EEPROM data\n");
736 return;
737 }
738
739 ops->get_eeprom(netdev, &eeprom, data);
740
741 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
742 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
743 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
744 csum_new += data[i] + (data[i + 1] << 8);
745 csum_new = EEPROM_SUM - csum_new;
746
747 pr_err("/*********************/\n");
748 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
749 pr_err("Calculated : 0x%04x\n", csum_new);
750
751 pr_err("Offset Values\n");
752 pr_err("======== ======\n");
753 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
754
755 pr_err("Include this output when contacting your support provider.\n");
756 pr_err("This is not a software error! Something bad happened to\n");
757 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
758 pr_err("result in further problems, possibly loss of data,\n");
759 pr_err("corruption or system hangs!\n");
760 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
761 pr_err("which is invalid and requires you to set the proper MAC\n");
762 pr_err("address manually before continuing to enable this network\n");
763 pr_err("device. Please inspect the EEPROM dump and report the\n");
764 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
765 pr_err("/*********************/\n");
766
767 kfree(data);
768}
769
770/**
771 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
772 * @pdev: PCI device information struct
773 *
774 * Return true if an adapter needs ioport resources
775 **/
776static int e1000_is_need_ioport(struct pci_dev *pdev)
777{
778 switch (pdev->device) {
779 case E1000_DEV_ID_82540EM:
780 case E1000_DEV_ID_82540EM_LOM:
781 case E1000_DEV_ID_82540EP:
782 case E1000_DEV_ID_82540EP_LOM:
783 case E1000_DEV_ID_82540EP_LP:
784 case E1000_DEV_ID_82541EI:
785 case E1000_DEV_ID_82541EI_MOBILE:
786 case E1000_DEV_ID_82541ER:
787 case E1000_DEV_ID_82541ER_LOM:
788 case E1000_DEV_ID_82541GI:
789 case E1000_DEV_ID_82541GI_LF:
790 case E1000_DEV_ID_82541GI_MOBILE:
791 case E1000_DEV_ID_82544EI_COPPER:
792 case E1000_DEV_ID_82544EI_FIBER:
793 case E1000_DEV_ID_82544GC_COPPER:
794 case E1000_DEV_ID_82544GC_LOM:
795 case E1000_DEV_ID_82545EM_COPPER:
796 case E1000_DEV_ID_82545EM_FIBER:
797 case E1000_DEV_ID_82546EB_COPPER:
798 case E1000_DEV_ID_82546EB_FIBER:
799 case E1000_DEV_ID_82546EB_QUAD_COPPER:
800 return true;
801 default:
802 return false;
803 }
804}
805
806static u32 e1000_fix_features(struct net_device *netdev, u32 features)
807{
808 /*
809 * Since there is no support for separate rx/tx vlan accel
810 * enable/disable make sure tx flag is always in same state as rx.
811 */
812 if (features & NETIF_F_HW_VLAN_RX)
813 features |= NETIF_F_HW_VLAN_TX;
814 else
815 features &= ~NETIF_F_HW_VLAN_TX;
816
817 return features;
818}
819
820static int e1000_set_features(struct net_device *netdev, u32 features)
821{
822 struct e1000_adapter *adapter = netdev_priv(netdev);
823 u32 changed = features ^ netdev->features;
824
825 if (changed & NETIF_F_HW_VLAN_RX)
826 e1000_vlan_mode(netdev, features);
827
828 if (!(changed & NETIF_F_RXCSUM))
829 return 0;
830
831 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
832
833 if (netif_running(netdev))
834 e1000_reinit_locked(adapter);
835 else
836 e1000_reset(adapter);
837
838 return 0;
839}
840
841static const struct net_device_ops e1000_netdev_ops = {
842 .ndo_open = e1000_open,
843 .ndo_stop = e1000_close,
844 .ndo_start_xmit = e1000_xmit_frame,
845 .ndo_get_stats = e1000_get_stats,
846 .ndo_set_rx_mode = e1000_set_rx_mode,
847 .ndo_set_mac_address = e1000_set_mac,
848 .ndo_tx_timeout = e1000_tx_timeout,
849 .ndo_change_mtu = e1000_change_mtu,
850 .ndo_do_ioctl = e1000_ioctl,
851 .ndo_validate_addr = eth_validate_addr,
852 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
853 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
854#ifdef CONFIG_NET_POLL_CONTROLLER
855 .ndo_poll_controller = e1000_netpoll,
856#endif
857 .ndo_fix_features = e1000_fix_features,
858 .ndo_set_features = e1000_set_features,
859};
860
861/**
862 * e1000_init_hw_struct - initialize members of hw struct
863 * @adapter: board private struct
864 * @hw: structure used by e1000_hw.c
865 *
866 * Factors out initialization of the e1000_hw struct to its own function
867 * that can be called very early at init (just after struct allocation).
868 * Fields are initialized based on PCI device information and
869 * OS network device settings (MTU size).
870 * Returns negative error codes if MAC type setup fails.
871 */
872static int e1000_init_hw_struct(struct e1000_adapter *adapter,
873 struct e1000_hw *hw)
874{
875 struct pci_dev *pdev = adapter->pdev;
876
877 /* PCI config space info */
878 hw->vendor_id = pdev->vendor;
879 hw->device_id = pdev->device;
880 hw->subsystem_vendor_id = pdev->subsystem_vendor;
881 hw->subsystem_id = pdev->subsystem_device;
882 hw->revision_id = pdev->revision;
883
884 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
885
886 hw->max_frame_size = adapter->netdev->mtu +
887 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
888 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
889
890 /* identify the MAC */
891 if (e1000_set_mac_type(hw)) {
892 e_err(probe, "Unknown MAC Type\n");
893 return -EIO;
894 }
895
896 switch (hw->mac_type) {
897 default:
898 break;
899 case e1000_82541:
900 case e1000_82547:
901 case e1000_82541_rev_2:
902 case e1000_82547_rev_2:
903 hw->phy_init_script = 1;
904 break;
905 }
906
907 e1000_set_media_type(hw);
908 e1000_get_bus_info(hw);
909
910 hw->wait_autoneg_complete = false;
911 hw->tbi_compatibility_en = true;
912 hw->adaptive_ifs = true;
913
914 /* Copper options */
915
916 if (hw->media_type == e1000_media_type_copper) {
917 hw->mdix = AUTO_ALL_MODES;
918 hw->disable_polarity_correction = false;
919 hw->master_slave = E1000_MASTER_SLAVE;
920 }
921
922 return 0;
923}
924
925/**
926 * e1000_probe - Device Initialization Routine
927 * @pdev: PCI device information struct
928 * @ent: entry in e1000_pci_tbl
929 *
930 * Returns 0 on success, negative on failure
931 *
932 * e1000_probe initializes an adapter identified by a pci_dev structure.
933 * The OS initialization, configuring of the adapter private structure,
934 * and a hardware reset occur.
935 **/
936static int __devinit e1000_probe(struct pci_dev *pdev,
937 const struct pci_device_id *ent)
938{
939 struct net_device *netdev;
940 struct e1000_adapter *adapter;
941 struct e1000_hw *hw;
942
943 static int cards_found = 0;
944 static int global_quad_port_a = 0; /* global ksp3 port a indication */
945 int i, err, pci_using_dac;
946 u16 eeprom_data = 0;
947 u16 tmp = 0;
948 u16 eeprom_apme_mask = E1000_EEPROM_APME;
949 int bars, need_ioport;
950
951 /* do not allocate ioport bars when not needed */
952 need_ioport = e1000_is_need_ioport(pdev);
953 if (need_ioport) {
954 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
955 err = pci_enable_device(pdev);
956 } else {
957 bars = pci_select_bars(pdev, IORESOURCE_MEM);
958 err = pci_enable_device_mem(pdev);
959 }
960 if (err)
961 return err;
962
963 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
964 if (err)
965 goto err_pci_reg;
966
967 pci_set_master(pdev);
968 err = pci_save_state(pdev);
969 if (err)
970 goto err_alloc_etherdev;
971
972 err = -ENOMEM;
973 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
974 if (!netdev)
975 goto err_alloc_etherdev;
976
977 SET_NETDEV_DEV(netdev, &pdev->dev);
978
979 pci_set_drvdata(pdev, netdev);
980 adapter = netdev_priv(netdev);
981 adapter->netdev = netdev;
982 adapter->pdev = pdev;
983 adapter->msg_enable = (1 << debug) - 1;
984 adapter->bars = bars;
985 adapter->need_ioport = need_ioport;
986
987 hw = &adapter->hw;
988 hw->back = adapter;
989
990 err = -EIO;
991 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
992 if (!hw->hw_addr)
993 goto err_ioremap;
994
995 if (adapter->need_ioport) {
996 for (i = BAR_1; i <= BAR_5; i++) {
997 if (pci_resource_len(pdev, i) == 0)
998 continue;
999 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1000 hw->io_base = pci_resource_start(pdev, i);
1001 break;
1002 }
1003 }
1004 }
1005
1006 /* make ready for any if (hw->...) below */
1007 err = e1000_init_hw_struct(adapter, hw);
1008 if (err)
1009 goto err_sw_init;
1010
1011 /*
1012 * there is a workaround being applied below that limits
1013 * 64-bit DMA addresses to 64-bit hardware. There are some
1014 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1015 */
1016 pci_using_dac = 0;
1017 if ((hw->bus_type == e1000_bus_type_pcix) &&
1018 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1019 /*
1020 * according to DMA-API-HOWTO, coherent calls will always
1021 * succeed if the set call did
1022 */
1023 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1024 pci_using_dac = 1;
1025 } else {
1026 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1027 if (err) {
1028 pr_err("No usable DMA config, aborting\n");
1029 goto err_dma;
1030 }
1031 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1032 }
1033
1034 netdev->netdev_ops = &e1000_netdev_ops;
1035 e1000_set_ethtool_ops(netdev);
1036 netdev->watchdog_timeo = 5 * HZ;
1037 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1038
1039 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1040
1041 adapter->bd_number = cards_found;
1042
1043 /* setup the private structure */
1044
1045 err = e1000_sw_init(adapter);
1046 if (err)
1047 goto err_sw_init;
1048
1049 err = -EIO;
1050 if (hw->mac_type == e1000_ce4100) {
1051 ce4100_gbe_mdio_base_phy = pci_resource_start(pdev, BAR_1);
1052 ce4100_gbe_mdio_base_virt = ioremap(ce4100_gbe_mdio_base_phy,
1053 pci_resource_len(pdev, BAR_1));
1054
1055 if (!ce4100_gbe_mdio_base_virt)
1056 goto err_mdio_ioremap;
1057 }
1058
1059 if (hw->mac_type >= e1000_82543) {
1060 netdev->hw_features = NETIF_F_SG |
1061 NETIF_F_HW_CSUM |
1062 NETIF_F_HW_VLAN_RX;
1063 netdev->features = NETIF_F_HW_VLAN_TX |
1064 NETIF_F_HW_VLAN_FILTER;
1065 }
1066
1067 if ((hw->mac_type >= e1000_82544) &&
1068 (hw->mac_type != e1000_82547))
1069 netdev->hw_features |= NETIF_F_TSO;
1070
1071 netdev->features |= netdev->hw_features;
1072 netdev->hw_features |= NETIF_F_RXCSUM;
1073
1074 if (pci_using_dac) {
1075 netdev->features |= NETIF_F_HIGHDMA;
1076 netdev->vlan_features |= NETIF_F_HIGHDMA;
1077 }
1078
1079 netdev->vlan_features |= NETIF_F_TSO;
1080 netdev->vlan_features |= NETIF_F_HW_CSUM;
1081 netdev->vlan_features |= NETIF_F_SG;
1082
1083 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1084
1085 /* initialize eeprom parameters */
1086 if (e1000_init_eeprom_params(hw)) {
1087 e_err(probe, "EEPROM initialization failed\n");
1088 goto err_eeprom;
1089 }
1090
1091 /* before reading the EEPROM, reset the controller to
1092 * put the device in a known good starting state */
1093
1094 e1000_reset_hw(hw);
1095
1096 /* make sure the EEPROM is good */
1097 if (e1000_validate_eeprom_checksum(hw) < 0) {
1098 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1099 e1000_dump_eeprom(adapter);
1100 /*
1101 * set MAC address to all zeroes to invalidate and temporary
1102 * disable this device for the user. This blocks regular
1103 * traffic while still permitting ethtool ioctls from reaching
1104 * the hardware as well as allowing the user to run the
1105 * interface after manually setting a hw addr using
1106 * `ip set address`
1107 */
1108 memset(hw->mac_addr, 0, netdev->addr_len);
1109 } else {
1110 /* copy the MAC address out of the EEPROM */
1111 if (e1000_read_mac_addr(hw))
1112 e_err(probe, "EEPROM Read Error\n");
1113 }
1114 /* don't block initalization here due to bad MAC address */
1115 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1116 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1117
1118 if (!is_valid_ether_addr(netdev->perm_addr))
1119 e_err(probe, "Invalid MAC Address\n");
1120
1121 init_timer(&adapter->tx_fifo_stall_timer);
1122 adapter->tx_fifo_stall_timer.function = e1000_82547_tx_fifo_stall;
1123 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1124
1125 init_timer(&adapter->watchdog_timer);
1126 adapter->watchdog_timer.function = e1000_watchdog;
1127 adapter->watchdog_timer.data = (unsigned long) adapter;
1128
1129 init_timer(&adapter->phy_info_timer);
1130 adapter->phy_info_timer.function = e1000_update_phy_info;
1131 adapter->phy_info_timer.data = (unsigned long)adapter;
1132
1133 INIT_WORK(&adapter->fifo_stall_task, e1000_82547_tx_fifo_stall_task);
1134 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1135 INIT_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1136
1137 e1000_check_options(adapter);
1138
1139 /* Initial Wake on LAN setting
1140 * If APM wake is enabled in the EEPROM,
1141 * enable the ACPI Magic Packet filter
1142 */
1143
1144 switch (hw->mac_type) {
1145 case e1000_82542_rev2_0:
1146 case e1000_82542_rev2_1:
1147 case e1000_82543:
1148 break;
1149 case e1000_82544:
1150 e1000_read_eeprom(hw,
1151 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1152 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1153 break;
1154 case e1000_82546:
1155 case e1000_82546_rev_3:
1156 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1157 e1000_read_eeprom(hw,
1158 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1159 break;
1160 }
1161 /* Fall Through */
1162 default:
1163 e1000_read_eeprom(hw,
1164 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1165 break;
1166 }
1167 if (eeprom_data & eeprom_apme_mask)
1168 adapter->eeprom_wol |= E1000_WUFC_MAG;
1169
1170 /* now that we have the eeprom settings, apply the special cases
1171 * where the eeprom may be wrong or the board simply won't support
1172 * wake on lan on a particular port */
1173 switch (pdev->device) {
1174 case E1000_DEV_ID_82546GB_PCIE:
1175 adapter->eeprom_wol = 0;
1176 break;
1177 case E1000_DEV_ID_82546EB_FIBER:
1178 case E1000_DEV_ID_82546GB_FIBER:
1179 /* Wake events only supported on port A for dual fiber
1180 * regardless of eeprom setting */
1181 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1182 adapter->eeprom_wol = 0;
1183 break;
1184 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1185 /* if quad port adapter, disable WoL on all but port A */
1186 if (global_quad_port_a != 0)
1187 adapter->eeprom_wol = 0;
1188 else
1189 adapter->quad_port_a = 1;
1190 /* Reset for multiple quad port adapters */
1191 if (++global_quad_port_a == 4)
1192 global_quad_port_a = 0;
1193 break;
1194 }
1195
1196 /* initialize the wol settings based on the eeprom settings */
1197 adapter->wol = adapter->eeprom_wol;
1198 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1199
1200 /* Auto detect PHY address */
1201 if (hw->mac_type == e1000_ce4100) {
1202 for (i = 0; i < 32; i++) {
1203 hw->phy_addr = i;
1204 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1205 if (tmp == 0 || tmp == 0xFF) {
1206 if (i == 31)
1207 goto err_eeprom;
1208 continue;
1209 } else
1210 break;
1211 }
1212 }
1213
1214 /* reset the hardware with the new settings */
1215 e1000_reset(adapter);
1216
1217 strcpy(netdev->name, "eth%d");
1218 err = register_netdev(netdev);
1219 if (err)
1220 goto err_register;
1221
1222 e1000_vlan_mode(netdev, netdev->features);
1223
1224 /* print bus type/speed/width info */
1225 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1226 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1227 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1228 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1229 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1230 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1231 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1232 netdev->dev_addr);
1233
1234 /* carrier off reporting is important to ethtool even BEFORE open */
1235 netif_carrier_off(netdev);
1236
1237 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1238
1239 cards_found++;
1240 return 0;
1241
1242err_register:
1243err_eeprom:
1244 e1000_phy_hw_reset(hw);
1245
1246 if (hw->flash_address)
1247 iounmap(hw->flash_address);
1248 kfree(adapter->tx_ring);
1249 kfree(adapter->rx_ring);
1250err_dma:
1251err_sw_init:
1252err_mdio_ioremap:
1253 iounmap(ce4100_gbe_mdio_base_virt);
1254 iounmap(hw->hw_addr);
1255err_ioremap:
1256 free_netdev(netdev);
1257err_alloc_etherdev:
1258 pci_release_selected_regions(pdev, bars);
1259err_pci_reg:
1260 pci_disable_device(pdev);
1261 return err;
1262}
1263
1264/**
1265 * e1000_remove - Device Removal Routine
1266 * @pdev: PCI device information struct
1267 *
1268 * e1000_remove is called by the PCI subsystem to alert the driver
1269 * that it should release a PCI device. The could be caused by a
1270 * Hot-Plug event, or because the driver is going to be removed from
1271 * memory.
1272 **/
1273
1274static void __devexit e1000_remove(struct pci_dev *pdev)
1275{
1276 struct net_device *netdev = pci_get_drvdata(pdev);
1277 struct e1000_adapter *adapter = netdev_priv(netdev);
1278 struct e1000_hw *hw = &adapter->hw;
1279
1280 set_bit(__E1000_DOWN, &adapter->flags);
1281 del_timer_sync(&adapter->tx_fifo_stall_timer);
1282 del_timer_sync(&adapter->watchdog_timer);
1283 del_timer_sync(&adapter->phy_info_timer);
1284
1285 cancel_work_sync(&adapter->reset_task);
1286
1287 e1000_release_manageability(adapter);
1288
1289 unregister_netdev(netdev);
1290
1291 e1000_phy_hw_reset(hw);
1292
1293 kfree(adapter->tx_ring);
1294 kfree(adapter->rx_ring);
1295
1296 iounmap(hw->hw_addr);
1297 if (hw->flash_address)
1298 iounmap(hw->flash_address);
1299 pci_release_selected_regions(pdev, adapter->bars);
1300
1301 free_netdev(netdev);
1302
1303 pci_disable_device(pdev);
1304}
1305
1306/**
1307 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1308 * @adapter: board private structure to initialize
1309 *
1310 * e1000_sw_init initializes the Adapter private data structure.
1311 * e1000_init_hw_struct MUST be called before this function
1312 **/
1313
1314static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1315{
1316 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1317
1318 adapter->num_tx_queues = 1;
1319 adapter->num_rx_queues = 1;
1320
1321 if (e1000_alloc_queues(adapter)) {
1322 e_err(probe, "Unable to allocate memory for queues\n");
1323 return -ENOMEM;
1324 }
1325
1326 /* Explicitly disable IRQ since the NIC can be in any state. */
1327 e1000_irq_disable(adapter);
1328
1329 spin_lock_init(&adapter->stats_lock);
1330
1331 set_bit(__E1000_DOWN, &adapter->flags);
1332
1333 return 0;
1334}
1335
1336/**
1337 * e1000_alloc_queues - Allocate memory for all rings
1338 * @adapter: board private structure to initialize
1339 *
1340 * We allocate one ring per queue at run-time since we don't know the
1341 * number of queues at compile-time.
1342 **/
1343
1344static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1345{
1346 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1347 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1348 if (!adapter->tx_ring)
1349 return -ENOMEM;
1350
1351 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1352 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1353 if (!adapter->rx_ring) {
1354 kfree(adapter->tx_ring);
1355 return -ENOMEM;
1356 }
1357
1358 return E1000_SUCCESS;
1359}
1360
1361/**
1362 * e1000_open - Called when a network interface is made active
1363 * @netdev: network interface device structure
1364 *
1365 * Returns 0 on success, negative value on failure
1366 *
1367 * The open entry point is called when a network interface is made
1368 * active by the system (IFF_UP). At this point all resources needed
1369 * for transmit and receive operations are allocated, the interrupt
1370 * handler is registered with the OS, the watchdog timer is started,
1371 * and the stack is notified that the interface is ready.
1372 **/
1373
1374static int e1000_open(struct net_device *netdev)
1375{
1376 struct e1000_adapter *adapter = netdev_priv(netdev);
1377 struct e1000_hw *hw = &adapter->hw;
1378 int err;
1379
1380 /* disallow open during test */
1381 if (test_bit(__E1000_TESTING, &adapter->flags))
1382 return -EBUSY;
1383
1384 netif_carrier_off(netdev);
1385
1386 /* allocate transmit descriptors */
1387 err = e1000_setup_all_tx_resources(adapter);
1388 if (err)
1389 goto err_setup_tx;
1390
1391 /* allocate receive descriptors */
1392 err = e1000_setup_all_rx_resources(adapter);
1393 if (err)
1394 goto err_setup_rx;
1395
1396 e1000_power_up_phy(adapter);
1397
1398 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1399 if ((hw->mng_cookie.status &
1400 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1401 e1000_update_mng_vlan(adapter);
1402 }
1403
1404 /* before we allocate an interrupt, we must be ready to handle it.
1405 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1406 * as soon as we call pci_request_irq, so we have to setup our
1407 * clean_rx handler before we do so. */
1408 e1000_configure(adapter);
1409
1410 err = e1000_request_irq(adapter);
1411 if (err)
1412 goto err_req_irq;
1413
1414 /* From here on the code is the same as e1000_up() */
1415 clear_bit(__E1000_DOWN, &adapter->flags);
1416
1417 napi_enable(&adapter->napi);
1418
1419 e1000_irq_enable(adapter);
1420
1421 netif_start_queue(netdev);
1422
1423 /* fire a link status change interrupt to start the watchdog */
1424 ew32(ICS, E1000_ICS_LSC);
1425
1426 return E1000_SUCCESS;
1427
1428err_req_irq:
1429 e1000_power_down_phy(adapter);
1430 e1000_free_all_rx_resources(adapter);
1431err_setup_rx:
1432 e1000_free_all_tx_resources(adapter);
1433err_setup_tx:
1434 e1000_reset(adapter);
1435
1436 return err;
1437}
1438
1439/**
1440 * e1000_close - Disables a network interface
1441 * @netdev: network interface device structure
1442 *
1443 * Returns 0, this is not allowed to fail
1444 *
1445 * The close entry point is called when an interface is de-activated
1446 * by the OS. The hardware is still under the drivers control, but
1447 * needs to be disabled. A global MAC reset is issued to stop the
1448 * hardware, and all transmit and receive resources are freed.
1449 **/
1450
1451static int e1000_close(struct net_device *netdev)
1452{
1453 struct e1000_adapter *adapter = netdev_priv(netdev);
1454 struct e1000_hw *hw = &adapter->hw;
1455
1456 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1457 e1000_down(adapter);
1458 e1000_power_down_phy(adapter);
1459 e1000_free_irq(adapter);
1460
1461 e1000_free_all_tx_resources(adapter);
1462 e1000_free_all_rx_resources(adapter);
1463
1464 /* kill manageability vlan ID if supported, but not if a vlan with
1465 * the same ID is registered on the host OS (let 8021q kill it) */
1466 if ((hw->mng_cookie.status &
1467 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1468 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1469 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1470 }
1471
1472 return 0;
1473}
1474
1475/**
1476 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1477 * @adapter: address of board private structure
1478 * @start: address of beginning of memory
1479 * @len: length of memory
1480 **/
1481static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1482 unsigned long len)
1483{
1484 struct e1000_hw *hw = &adapter->hw;
1485 unsigned long begin = (unsigned long)start;
1486 unsigned long end = begin + len;
1487
1488 /* First rev 82545 and 82546 need to not allow any memory
1489 * write location to cross 64k boundary due to errata 23 */
1490 if (hw->mac_type == e1000_82545 ||
1491 hw->mac_type == e1000_ce4100 ||
1492 hw->mac_type == e1000_82546) {
1493 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1494 }
1495
1496 return true;
1497}
1498
1499/**
1500 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1501 * @adapter: board private structure
1502 * @txdr: tx descriptor ring (for a specific queue) to setup
1503 *
1504 * Return 0 on success, negative on failure
1505 **/
1506
1507static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1508 struct e1000_tx_ring *txdr)
1509{
1510 struct pci_dev *pdev = adapter->pdev;
1511 int size;
1512
1513 size = sizeof(struct e1000_buffer) * txdr->count;
1514 txdr->buffer_info = vzalloc(size);
1515 if (!txdr->buffer_info) {
1516 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1517 "ring\n");
1518 return -ENOMEM;
1519 }
1520
1521 /* round up to nearest 4K */
1522
1523 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1524 txdr->size = ALIGN(txdr->size, 4096);
1525
1526 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1527 GFP_KERNEL);
1528 if (!txdr->desc) {
1529setup_tx_desc_die:
1530 vfree(txdr->buffer_info);
1531 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1532 "ring\n");
1533 return -ENOMEM;
1534 }
1535
1536 /* Fix for errata 23, can't cross 64kB boundary */
1537 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1538 void *olddesc = txdr->desc;
1539 dma_addr_t olddma = txdr->dma;
1540 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1541 txdr->size, txdr->desc);
1542 /* Try again, without freeing the previous */
1543 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1544 &txdr->dma, GFP_KERNEL);
1545 /* Failed allocation, critical failure */
1546 if (!txdr->desc) {
1547 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1548 olddma);
1549 goto setup_tx_desc_die;
1550 }
1551
1552 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1553 /* give up */
1554 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1555 txdr->dma);
1556 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1557 olddma);
1558 e_err(probe, "Unable to allocate aligned memory "
1559 "for the transmit descriptor ring\n");
1560 vfree(txdr->buffer_info);
1561 return -ENOMEM;
1562 } else {
1563 /* Free old allocation, new allocation was successful */
1564 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1565 olddma);
1566 }
1567 }
1568 memset(txdr->desc, 0, txdr->size);
1569
1570 txdr->next_to_use = 0;
1571 txdr->next_to_clean = 0;
1572
1573 return 0;
1574}
1575
1576/**
1577 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1578 * (Descriptors) for all queues
1579 * @adapter: board private structure
1580 *
1581 * Return 0 on success, negative on failure
1582 **/
1583
1584int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1585{
1586 int i, err = 0;
1587
1588 for (i = 0; i < adapter->num_tx_queues; i++) {
1589 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1590 if (err) {
1591 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1592 for (i-- ; i >= 0; i--)
1593 e1000_free_tx_resources(adapter,
1594 &adapter->tx_ring[i]);
1595 break;
1596 }
1597 }
1598
1599 return err;
1600}
1601
1602/**
1603 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1604 * @adapter: board private structure
1605 *
1606 * Configure the Tx unit of the MAC after a reset.
1607 **/
1608
1609static void e1000_configure_tx(struct e1000_adapter *adapter)
1610{
1611 u64 tdba;
1612 struct e1000_hw *hw = &adapter->hw;
1613 u32 tdlen, tctl, tipg;
1614 u32 ipgr1, ipgr2;
1615
1616 /* Setup the HW Tx Head and Tail descriptor pointers */
1617
1618 switch (adapter->num_tx_queues) {
1619 case 1:
1620 default:
1621 tdba = adapter->tx_ring[0].dma;
1622 tdlen = adapter->tx_ring[0].count *
1623 sizeof(struct e1000_tx_desc);
1624 ew32(TDLEN, tdlen);
1625 ew32(TDBAH, (tdba >> 32));
1626 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1627 ew32(TDT, 0);
1628 ew32(TDH, 0);
1629 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1630 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1631 break;
1632 }
1633
1634 /* Set the default values for the Tx Inter Packet Gap timer */
1635 if ((hw->media_type == e1000_media_type_fiber ||
1636 hw->media_type == e1000_media_type_internal_serdes))
1637 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1638 else
1639 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1640
1641 switch (hw->mac_type) {
1642 case e1000_82542_rev2_0:
1643 case e1000_82542_rev2_1:
1644 tipg = DEFAULT_82542_TIPG_IPGT;
1645 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1646 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1647 break;
1648 default:
1649 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1650 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1651 break;
1652 }
1653 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1654 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1655 ew32(TIPG, tipg);
1656
1657 /* Set the Tx Interrupt Delay register */
1658
1659 ew32(TIDV, adapter->tx_int_delay);
1660 if (hw->mac_type >= e1000_82540)
1661 ew32(TADV, adapter->tx_abs_int_delay);
1662
1663 /* Program the Transmit Control Register */
1664
1665 tctl = er32(TCTL);
1666 tctl &= ~E1000_TCTL_CT;
1667 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1668 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1669
1670 e1000_config_collision_dist(hw);
1671
1672 /* Setup Transmit Descriptor Settings for eop descriptor */
1673 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1674
1675 /* only set IDE if we are delaying interrupts using the timers */
1676 if (adapter->tx_int_delay)
1677 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1678
1679 if (hw->mac_type < e1000_82543)
1680 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1681 else
1682 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1683
1684 /* Cache if we're 82544 running in PCI-X because we'll
1685 * need this to apply a workaround later in the send path. */
1686 if (hw->mac_type == e1000_82544 &&
1687 hw->bus_type == e1000_bus_type_pcix)
1688 adapter->pcix_82544 = 1;
1689
1690 ew32(TCTL, tctl);
1691
1692}
1693
1694/**
1695 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1696 * @adapter: board private structure
1697 * @rxdr: rx descriptor ring (for a specific queue) to setup
1698 *
1699 * Returns 0 on success, negative on failure
1700 **/
1701
1702static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1703 struct e1000_rx_ring *rxdr)
1704{
1705 struct pci_dev *pdev = adapter->pdev;
1706 int size, desc_len;
1707
1708 size = sizeof(struct e1000_buffer) * rxdr->count;
1709 rxdr->buffer_info = vzalloc(size);
1710 if (!rxdr->buffer_info) {
1711 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1712 "ring\n");
1713 return -ENOMEM;
1714 }
1715
1716 desc_len = sizeof(struct e1000_rx_desc);
1717
1718 /* Round up to nearest 4K */
1719
1720 rxdr->size = rxdr->count * desc_len;
1721 rxdr->size = ALIGN(rxdr->size, 4096);
1722
1723 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1724 GFP_KERNEL);
1725
1726 if (!rxdr->desc) {
1727 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1728 "ring\n");
1729setup_rx_desc_die:
1730 vfree(rxdr->buffer_info);
1731 return -ENOMEM;
1732 }
1733
1734 /* Fix for errata 23, can't cross 64kB boundary */
1735 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1736 void *olddesc = rxdr->desc;
1737 dma_addr_t olddma = rxdr->dma;
1738 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1739 rxdr->size, rxdr->desc);
1740 /* Try again, without freeing the previous */
1741 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1742 &rxdr->dma, GFP_KERNEL);
1743 /* Failed allocation, critical failure */
1744 if (!rxdr->desc) {
1745 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1746 olddma);
1747 e_err(probe, "Unable to allocate memory for the Rx "
1748 "descriptor ring\n");
1749 goto setup_rx_desc_die;
1750 }
1751
1752 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1753 /* give up */
1754 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1755 rxdr->dma);
1756 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1757 olddma);
1758 e_err(probe, "Unable to allocate aligned memory for "
1759 "the Rx descriptor ring\n");
1760 goto setup_rx_desc_die;
1761 } else {
1762 /* Free old allocation, new allocation was successful */
1763 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1764 olddma);
1765 }
1766 }
1767 memset(rxdr->desc, 0, rxdr->size);
1768
1769 rxdr->next_to_clean = 0;
1770 rxdr->next_to_use = 0;
1771 rxdr->rx_skb_top = NULL;
1772
1773 return 0;
1774}
1775
1776/**
1777 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1778 * (Descriptors) for all queues
1779 * @adapter: board private structure
1780 *
1781 * Return 0 on success, negative on failure
1782 **/
1783
1784int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1785{
1786 int i, err = 0;
1787
1788 for (i = 0; i < adapter->num_rx_queues; i++) {
1789 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1790 if (err) {
1791 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1792 for (i-- ; i >= 0; i--)
1793 e1000_free_rx_resources(adapter,
1794 &adapter->rx_ring[i]);
1795 break;
1796 }
1797 }
1798
1799 return err;
1800}
1801
1802/**
1803 * e1000_setup_rctl - configure the receive control registers
1804 * @adapter: Board private structure
1805 **/
1806static void e1000_setup_rctl(struct e1000_adapter *adapter)
1807{
1808 struct e1000_hw *hw = &adapter->hw;
1809 u32 rctl;
1810
1811 rctl = er32(RCTL);
1812
1813 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1814
1815 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1816 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1817 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1818
1819 if (hw->tbi_compatibility_on == 1)
1820 rctl |= E1000_RCTL_SBP;
1821 else
1822 rctl &= ~E1000_RCTL_SBP;
1823
1824 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1825 rctl &= ~E1000_RCTL_LPE;
1826 else
1827 rctl |= E1000_RCTL_LPE;
1828
1829 /* Setup buffer sizes */
1830 rctl &= ~E1000_RCTL_SZ_4096;
1831 rctl |= E1000_RCTL_BSEX;
1832 switch (adapter->rx_buffer_len) {
1833 case E1000_RXBUFFER_2048:
1834 default:
1835 rctl |= E1000_RCTL_SZ_2048;
1836 rctl &= ~E1000_RCTL_BSEX;
1837 break;
1838 case E1000_RXBUFFER_4096:
1839 rctl |= E1000_RCTL_SZ_4096;
1840 break;
1841 case E1000_RXBUFFER_8192:
1842 rctl |= E1000_RCTL_SZ_8192;
1843 break;
1844 case E1000_RXBUFFER_16384:
1845 rctl |= E1000_RCTL_SZ_16384;
1846 break;
1847 }
1848
1849 ew32(RCTL, rctl);
1850}
1851
1852/**
1853 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1854 * @adapter: board private structure
1855 *
1856 * Configure the Rx unit of the MAC after a reset.
1857 **/
1858
1859static void e1000_configure_rx(struct e1000_adapter *adapter)
1860{
1861 u64 rdba;
1862 struct e1000_hw *hw = &adapter->hw;
1863 u32 rdlen, rctl, rxcsum;
1864
1865 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1866 rdlen = adapter->rx_ring[0].count *
1867 sizeof(struct e1000_rx_desc);
1868 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1869 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1870 } else {
1871 rdlen = adapter->rx_ring[0].count *
1872 sizeof(struct e1000_rx_desc);
1873 adapter->clean_rx = e1000_clean_rx_irq;
1874 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1875 }
1876
1877 /* disable receives while setting up the descriptors */
1878 rctl = er32(RCTL);
1879 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1880
1881 /* set the Receive Delay Timer Register */
1882 ew32(RDTR, adapter->rx_int_delay);
1883
1884 if (hw->mac_type >= e1000_82540) {
1885 ew32(RADV, adapter->rx_abs_int_delay);
1886 if (adapter->itr_setting != 0)
1887 ew32(ITR, 1000000000 / (adapter->itr * 256));
1888 }
1889
1890 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1891 * the Base and Length of the Rx Descriptor Ring */
1892 switch (adapter->num_rx_queues) {
1893 case 1:
1894 default:
1895 rdba = adapter->rx_ring[0].dma;
1896 ew32(RDLEN, rdlen);
1897 ew32(RDBAH, (rdba >> 32));
1898 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1899 ew32(RDT, 0);
1900 ew32(RDH, 0);
1901 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1902 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1903 break;
1904 }
1905
1906 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1907 if (hw->mac_type >= e1000_82543) {
1908 rxcsum = er32(RXCSUM);
1909 if (adapter->rx_csum)
1910 rxcsum |= E1000_RXCSUM_TUOFL;
1911 else
1912 /* don't need to clear IPPCSE as it defaults to 0 */
1913 rxcsum &= ~E1000_RXCSUM_TUOFL;
1914 ew32(RXCSUM, rxcsum);
1915 }
1916
1917 /* Enable Receives */
1918 ew32(RCTL, rctl);
1919}
1920
1921/**
1922 * e1000_free_tx_resources - Free Tx Resources per Queue
1923 * @adapter: board private structure
1924 * @tx_ring: Tx descriptor ring for a specific queue
1925 *
1926 * Free all transmit software resources
1927 **/
1928
1929static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1930 struct e1000_tx_ring *tx_ring)
1931{
1932 struct pci_dev *pdev = adapter->pdev;
1933
1934 e1000_clean_tx_ring(adapter, tx_ring);
1935
1936 vfree(tx_ring->buffer_info);
1937 tx_ring->buffer_info = NULL;
1938
1939 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1940 tx_ring->dma);
1941
1942 tx_ring->desc = NULL;
1943}
1944
1945/**
1946 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1947 * @adapter: board private structure
1948 *
1949 * Free all transmit software resources
1950 **/
1951
1952void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1953{
1954 int i;
1955
1956 for (i = 0; i < adapter->num_tx_queues; i++)
1957 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1958}
1959
1960static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1961 struct e1000_buffer *buffer_info)
1962{
1963 if (buffer_info->dma) {
1964 if (buffer_info->mapped_as_page)
1965 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1966 buffer_info->length, DMA_TO_DEVICE);
1967 else
1968 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1969 buffer_info->length,
1970 DMA_TO_DEVICE);
1971 buffer_info->dma = 0;
1972 }
1973 if (buffer_info->skb) {
1974 dev_kfree_skb_any(buffer_info->skb);
1975 buffer_info->skb = NULL;
1976 }
1977 buffer_info->time_stamp = 0;
1978 /* buffer_info must be completely set up in the transmit path */
1979}
1980
1981/**
1982 * e1000_clean_tx_ring - Free Tx Buffers
1983 * @adapter: board private structure
1984 * @tx_ring: ring to be cleaned
1985 **/
1986
1987static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1988 struct e1000_tx_ring *tx_ring)
1989{
1990 struct e1000_hw *hw = &adapter->hw;
1991 struct e1000_buffer *buffer_info;
1992 unsigned long size;
1993 unsigned int i;
1994
1995 /* Free all the Tx ring sk_buffs */
1996
1997 for (i = 0; i < tx_ring->count; i++) {
1998 buffer_info = &tx_ring->buffer_info[i];
1999 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2000 }
2001
2002 size = sizeof(struct e1000_buffer) * tx_ring->count;
2003 memset(tx_ring->buffer_info, 0, size);
2004
2005 /* Zero out the descriptor ring */
2006
2007 memset(tx_ring->desc, 0, tx_ring->size);
2008
2009 tx_ring->next_to_use = 0;
2010 tx_ring->next_to_clean = 0;
2011 tx_ring->last_tx_tso = 0;
2012
2013 writel(0, hw->hw_addr + tx_ring->tdh);
2014 writel(0, hw->hw_addr + tx_ring->tdt);
2015}
2016
2017/**
2018 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2019 * @adapter: board private structure
2020 **/
2021
2022static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2023{
2024 int i;
2025
2026 for (i = 0; i < adapter->num_tx_queues; i++)
2027 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2028}
2029
2030/**
2031 * e1000_free_rx_resources - Free Rx Resources
2032 * @adapter: board private structure
2033 * @rx_ring: ring to clean the resources from
2034 *
2035 * Free all receive software resources
2036 **/
2037
2038static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2039 struct e1000_rx_ring *rx_ring)
2040{
2041 struct pci_dev *pdev = adapter->pdev;
2042
2043 e1000_clean_rx_ring(adapter, rx_ring);
2044
2045 vfree(rx_ring->buffer_info);
2046 rx_ring->buffer_info = NULL;
2047
2048 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2049 rx_ring->dma);
2050
2051 rx_ring->desc = NULL;
2052}
2053
2054/**
2055 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2056 * @adapter: board private structure
2057 *
2058 * Free all receive software resources
2059 **/
2060
2061void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2062{
2063 int i;
2064
2065 for (i = 0; i < adapter->num_rx_queues; i++)
2066 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2067}
2068
2069/**
2070 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2071 * @adapter: board private structure
2072 * @rx_ring: ring to free buffers from
2073 **/
2074
2075static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2076 struct e1000_rx_ring *rx_ring)
2077{
2078 struct e1000_hw *hw = &adapter->hw;
2079 struct e1000_buffer *buffer_info;
2080 struct pci_dev *pdev = adapter->pdev;
2081 unsigned long size;
2082 unsigned int i;
2083
2084 /* Free all the Rx ring sk_buffs */
2085 for (i = 0; i < rx_ring->count; i++) {
2086 buffer_info = &rx_ring->buffer_info[i];
2087 if (buffer_info->dma &&
2088 adapter->clean_rx == e1000_clean_rx_irq) {
2089 dma_unmap_single(&pdev->dev, buffer_info->dma,
2090 buffer_info->length,
2091 DMA_FROM_DEVICE);
2092 } else if (buffer_info->dma &&
2093 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2094 dma_unmap_page(&pdev->dev, buffer_info->dma,
2095 buffer_info->length,
2096 DMA_FROM_DEVICE);
2097 }
2098
2099 buffer_info->dma = 0;
2100 if (buffer_info->page) {
2101 put_page(buffer_info->page);
2102 buffer_info->page = NULL;
2103 }
2104 if (buffer_info->skb) {
2105 dev_kfree_skb(buffer_info->skb);
2106 buffer_info->skb = NULL;
2107 }
2108 }
2109
2110 /* there also may be some cached data from a chained receive */
2111 if (rx_ring->rx_skb_top) {
2112 dev_kfree_skb(rx_ring->rx_skb_top);
2113 rx_ring->rx_skb_top = NULL;
2114 }
2115
2116 size = sizeof(struct e1000_buffer) * rx_ring->count;
2117 memset(rx_ring->buffer_info, 0, size);
2118
2119 /* Zero out the descriptor ring */
2120 memset(rx_ring->desc, 0, rx_ring->size);
2121
2122 rx_ring->next_to_clean = 0;
2123 rx_ring->next_to_use = 0;
2124
2125 writel(0, hw->hw_addr + rx_ring->rdh);
2126 writel(0, hw->hw_addr + rx_ring->rdt);
2127}
2128
2129/**
2130 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2131 * @adapter: board private structure
2132 **/
2133
2134static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2135{
2136 int i;
2137
2138 for (i = 0; i < adapter->num_rx_queues; i++)
2139 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2140}
2141
2142/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2143 * and memory write and invalidate disabled for certain operations
2144 */
2145static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2146{
2147 struct e1000_hw *hw = &adapter->hw;
2148 struct net_device *netdev = adapter->netdev;
2149 u32 rctl;
2150
2151 e1000_pci_clear_mwi(hw);
2152
2153 rctl = er32(RCTL);
2154 rctl |= E1000_RCTL_RST;
2155 ew32(RCTL, rctl);
2156 E1000_WRITE_FLUSH();
2157 mdelay(5);
2158
2159 if (netif_running(netdev))
2160 e1000_clean_all_rx_rings(adapter);
2161}
2162
2163static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2164{
2165 struct e1000_hw *hw = &adapter->hw;
2166 struct net_device *netdev = adapter->netdev;
2167 u32 rctl;
2168
2169 rctl = er32(RCTL);
2170 rctl &= ~E1000_RCTL_RST;
2171 ew32(RCTL, rctl);
2172 E1000_WRITE_FLUSH();
2173 mdelay(5);
2174
2175 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2176 e1000_pci_set_mwi(hw);
2177
2178 if (netif_running(netdev)) {
2179 /* No need to loop, because 82542 supports only 1 queue */
2180 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2181 e1000_configure_rx(adapter);
2182 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2183 }
2184}
2185
2186/**
2187 * e1000_set_mac - Change the Ethernet Address of the NIC
2188 * @netdev: network interface device structure
2189 * @p: pointer to an address structure
2190 *
2191 * Returns 0 on success, negative on failure
2192 **/
2193
2194static int e1000_set_mac(struct net_device *netdev, void *p)
2195{
2196 struct e1000_adapter *adapter = netdev_priv(netdev);
2197 struct e1000_hw *hw = &adapter->hw;
2198 struct sockaddr *addr = p;
2199
2200 if (!is_valid_ether_addr(addr->sa_data))
2201 return -EADDRNOTAVAIL;
2202
2203 /* 82542 2.0 needs to be in reset to write receive address registers */
2204
2205 if (hw->mac_type == e1000_82542_rev2_0)
2206 e1000_enter_82542_rst(adapter);
2207
2208 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2209 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2210
2211 e1000_rar_set(hw, hw->mac_addr, 0);
2212
2213 if (hw->mac_type == e1000_82542_rev2_0)
2214 e1000_leave_82542_rst(adapter);
2215
2216 return 0;
2217}
2218
2219/**
2220 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2221 * @netdev: network interface device structure
2222 *
2223 * The set_rx_mode entry point is called whenever the unicast or multicast
2224 * address lists or the network interface flags are updated. This routine is
2225 * responsible for configuring the hardware for proper unicast, multicast,
2226 * promiscuous mode, and all-multi behavior.
2227 **/
2228
2229static void e1000_set_rx_mode(struct net_device *netdev)
2230{
2231 struct e1000_adapter *adapter = netdev_priv(netdev);
2232 struct e1000_hw *hw = &adapter->hw;
2233 struct netdev_hw_addr *ha;
2234 bool use_uc = false;
2235 u32 rctl;
2236 u32 hash_value;
2237 int i, rar_entries = E1000_RAR_ENTRIES;
2238 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2239 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2240
2241 if (!mcarray) {
2242 e_err(probe, "memory allocation failed\n");
2243 return;
2244 }
2245
2246 /* Check for Promiscuous and All Multicast modes */
2247
2248 rctl = er32(RCTL);
2249
2250 if (netdev->flags & IFF_PROMISC) {
2251 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2252 rctl &= ~E1000_RCTL_VFE;
2253 } else {
2254 if (netdev->flags & IFF_ALLMULTI)
2255 rctl |= E1000_RCTL_MPE;
2256 else
2257 rctl &= ~E1000_RCTL_MPE;
2258 /* Enable VLAN filter if there is a VLAN */
2259 if (e1000_vlan_used(adapter))
2260 rctl |= E1000_RCTL_VFE;
2261 }
2262
2263 if (netdev_uc_count(netdev) > rar_entries - 1) {
2264 rctl |= E1000_RCTL_UPE;
2265 } else if (!(netdev->flags & IFF_PROMISC)) {
2266 rctl &= ~E1000_RCTL_UPE;
2267 use_uc = true;
2268 }
2269
2270 ew32(RCTL, rctl);
2271
2272 /* 82542 2.0 needs to be in reset to write receive address registers */
2273
2274 if (hw->mac_type == e1000_82542_rev2_0)
2275 e1000_enter_82542_rst(adapter);
2276
2277 /* load the first 14 addresses into the exact filters 1-14. Unicast
2278 * addresses take precedence to avoid disabling unicast filtering
2279 * when possible.
2280 *
2281 * RAR 0 is used for the station MAC address
2282 * if there are not 14 addresses, go ahead and clear the filters
2283 */
2284 i = 1;
2285 if (use_uc)
2286 netdev_for_each_uc_addr(ha, netdev) {
2287 if (i == rar_entries)
2288 break;
2289 e1000_rar_set(hw, ha->addr, i++);
2290 }
2291
2292 netdev_for_each_mc_addr(ha, netdev) {
2293 if (i == rar_entries) {
2294 /* load any remaining addresses into the hash table */
2295 u32 hash_reg, hash_bit, mta;
2296 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2297 hash_reg = (hash_value >> 5) & 0x7F;
2298 hash_bit = hash_value & 0x1F;
2299 mta = (1 << hash_bit);
2300 mcarray[hash_reg] |= mta;
2301 } else {
2302 e1000_rar_set(hw, ha->addr, i++);
2303 }
2304 }
2305
2306 for (; i < rar_entries; i++) {
2307 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2308 E1000_WRITE_FLUSH();
2309 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2310 E1000_WRITE_FLUSH();
2311 }
2312
2313 /* write the hash table completely, write from bottom to avoid
2314 * both stupid write combining chipsets, and flushing each write */
2315 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2316 /*
2317 * If we are on an 82544 has an errata where writing odd
2318 * offsets overwrites the previous even offset, but writing
2319 * backwards over the range solves the issue by always
2320 * writing the odd offset first
2321 */
2322 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2323 }
2324 E1000_WRITE_FLUSH();
2325
2326 if (hw->mac_type == e1000_82542_rev2_0)
2327 e1000_leave_82542_rst(adapter);
2328
2329 kfree(mcarray);
2330}
2331
2332/* Need to wait a few seconds after link up to get diagnostic information from
2333 * the phy */
2334
2335static void e1000_update_phy_info(unsigned long data)
2336{
2337 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2338 schedule_work(&adapter->phy_info_task);
2339}
2340
2341static void e1000_update_phy_info_task(struct work_struct *work)
2342{
2343 struct e1000_adapter *adapter = container_of(work,
2344 struct e1000_adapter,
2345 phy_info_task);
2346 struct e1000_hw *hw = &adapter->hw;
2347
2348 rtnl_lock();
2349 e1000_phy_get_info(hw, &adapter->phy_info);
2350 rtnl_unlock();
2351}
2352
2353/**
2354 * e1000_82547_tx_fifo_stall - Timer Call-back
2355 * @data: pointer to adapter cast into an unsigned long
2356 **/
2357static void e1000_82547_tx_fifo_stall(unsigned long data)
2358{
2359 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2360 schedule_work(&adapter->fifo_stall_task);
2361}
2362
2363/**
2364 * e1000_82547_tx_fifo_stall_task - task to complete work
2365 * @work: work struct contained inside adapter struct
2366 **/
2367static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2368{
2369 struct e1000_adapter *adapter = container_of(work,
2370 struct e1000_adapter,
2371 fifo_stall_task);
2372 struct e1000_hw *hw = &adapter->hw;
2373 struct net_device *netdev = adapter->netdev;
2374 u32 tctl;
2375
2376 rtnl_lock();
2377 if (atomic_read(&adapter->tx_fifo_stall)) {
2378 if ((er32(TDT) == er32(TDH)) &&
2379 (er32(TDFT) == er32(TDFH)) &&
2380 (er32(TDFTS) == er32(TDFHS))) {
2381 tctl = er32(TCTL);
2382 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2383 ew32(TDFT, adapter->tx_head_addr);
2384 ew32(TDFH, adapter->tx_head_addr);
2385 ew32(TDFTS, adapter->tx_head_addr);
2386 ew32(TDFHS, adapter->tx_head_addr);
2387 ew32(TCTL, tctl);
2388 E1000_WRITE_FLUSH();
2389
2390 adapter->tx_fifo_head = 0;
2391 atomic_set(&adapter->tx_fifo_stall, 0);
2392 netif_wake_queue(netdev);
2393 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2394 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2395 }
2396 }
2397 rtnl_unlock();
2398}
2399
2400bool e1000_has_link(struct e1000_adapter *adapter)
2401{
2402 struct e1000_hw *hw = &adapter->hw;
2403 bool link_active = false;
2404
2405 /* get_link_status is set on LSC (link status) interrupt or rx
2406 * sequence error interrupt (except on intel ce4100).
2407 * get_link_status will stay false until the
2408 * e1000_check_for_link establishes link for copper adapters
2409 * ONLY
2410 */
2411 switch (hw->media_type) {
2412 case e1000_media_type_copper:
2413 if (hw->mac_type == e1000_ce4100)
2414 hw->get_link_status = 1;
2415 if (hw->get_link_status) {
2416 e1000_check_for_link(hw);
2417 link_active = !hw->get_link_status;
2418 } else {
2419 link_active = true;
2420 }
2421 break;
2422 case e1000_media_type_fiber:
2423 e1000_check_for_link(hw);
2424 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2425 break;
2426 case e1000_media_type_internal_serdes:
2427 e1000_check_for_link(hw);
2428 link_active = hw->serdes_has_link;
2429 break;
2430 default:
2431 break;
2432 }
2433
2434 return link_active;
2435}
2436
2437/**
2438 * e1000_watchdog - Timer Call-back
2439 * @data: pointer to adapter cast into an unsigned long
2440 **/
2441static void e1000_watchdog(unsigned long data)
2442{
2443 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2444 struct e1000_hw *hw = &adapter->hw;
2445 struct net_device *netdev = adapter->netdev;
2446 struct e1000_tx_ring *txdr = adapter->tx_ring;
2447 u32 link, tctl;
2448
2449 link = e1000_has_link(adapter);
2450 if ((netif_carrier_ok(netdev)) && link)
2451 goto link_up;
2452
2453 if (link) {
2454 if (!netif_carrier_ok(netdev)) {
2455 u32 ctrl;
2456 bool txb2b = true;
2457 /* update snapshot of PHY registers on LSC */
2458 e1000_get_speed_and_duplex(hw,
2459 &adapter->link_speed,
2460 &adapter->link_duplex);
2461
2462 ctrl = er32(CTRL);
2463 pr_info("%s NIC Link is Up %d Mbps %s, "
2464 "Flow Control: %s\n",
2465 netdev->name,
2466 adapter->link_speed,
2467 adapter->link_duplex == FULL_DUPLEX ?
2468 "Full Duplex" : "Half Duplex",
2469 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2470 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2471 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2472 E1000_CTRL_TFCE) ? "TX" : "None")));
2473
2474 /* adjust timeout factor according to speed/duplex */
2475 adapter->tx_timeout_factor = 1;
2476 switch (adapter->link_speed) {
2477 case SPEED_10:
2478 txb2b = false;
2479 adapter->tx_timeout_factor = 16;
2480 break;
2481 case SPEED_100:
2482 txb2b = false;
2483 /* maybe add some timeout factor ? */
2484 break;
2485 }
2486
2487 /* enable transmits in the hardware */
2488 tctl = er32(TCTL);
2489 tctl |= E1000_TCTL_EN;
2490 ew32(TCTL, tctl);
2491
2492 netif_carrier_on(netdev);
2493 if (!test_bit(__E1000_DOWN, &adapter->flags))
2494 mod_timer(&adapter->phy_info_timer,
2495 round_jiffies(jiffies + 2 * HZ));
2496 adapter->smartspeed = 0;
2497 }
2498 } else {
2499 if (netif_carrier_ok(netdev)) {
2500 adapter->link_speed = 0;
2501 adapter->link_duplex = 0;
2502 pr_info("%s NIC Link is Down\n",
2503 netdev->name);
2504 netif_carrier_off(netdev);
2505
2506 if (!test_bit(__E1000_DOWN, &adapter->flags))
2507 mod_timer(&adapter->phy_info_timer,
2508 round_jiffies(jiffies + 2 * HZ));
2509 }
2510
2511 e1000_smartspeed(adapter);
2512 }
2513
2514link_up:
2515 e1000_update_stats(adapter);
2516
2517 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2518 adapter->tpt_old = adapter->stats.tpt;
2519 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2520 adapter->colc_old = adapter->stats.colc;
2521
2522 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2523 adapter->gorcl_old = adapter->stats.gorcl;
2524 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2525 adapter->gotcl_old = adapter->stats.gotcl;
2526
2527 e1000_update_adaptive(hw);
2528
2529 if (!netif_carrier_ok(netdev)) {
2530 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2531 /* We've lost link, so the controller stops DMA,
2532 * but we've got queued Tx work that's never going
2533 * to get done, so reset controller to flush Tx.
2534 * (Do the reset outside of interrupt context). */
2535 adapter->tx_timeout_count++;
2536 schedule_work(&adapter->reset_task);
2537 /* return immediately since reset is imminent */
2538 return;
2539 }
2540 }
2541
2542 /* Simple mode for Interrupt Throttle Rate (ITR) */
2543 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2544 /*
2545 * Symmetric Tx/Rx gets a reduced ITR=2000;
2546 * Total asymmetrical Tx or Rx gets ITR=8000;
2547 * everyone else is between 2000-8000.
2548 */
2549 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2550 u32 dif = (adapter->gotcl > adapter->gorcl ?
2551 adapter->gotcl - adapter->gorcl :
2552 adapter->gorcl - adapter->gotcl) / 10000;
2553 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2554
2555 ew32(ITR, 1000000000 / (itr * 256));
2556 }
2557
2558 /* Cause software interrupt to ensure rx ring is cleaned */
2559 ew32(ICS, E1000_ICS_RXDMT0);
2560
2561 /* Force detection of hung controller every watchdog period */
2562 adapter->detect_tx_hung = true;
2563
2564 /* Reset the timer */
2565 if (!test_bit(__E1000_DOWN, &adapter->flags))
2566 mod_timer(&adapter->watchdog_timer,
2567 round_jiffies(jiffies + 2 * HZ));
2568}
2569
2570enum latency_range {
2571 lowest_latency = 0,
2572 low_latency = 1,
2573 bulk_latency = 2,
2574 latency_invalid = 255
2575};
2576
2577/**
2578 * e1000_update_itr - update the dynamic ITR value based on statistics
2579 * @adapter: pointer to adapter
2580 * @itr_setting: current adapter->itr
2581 * @packets: the number of packets during this measurement interval
2582 * @bytes: the number of bytes during this measurement interval
2583 *
2584 * Stores a new ITR value based on packets and byte
2585 * counts during the last interrupt. The advantage of per interrupt
2586 * computation is faster updates and more accurate ITR for the current
2587 * traffic pattern. Constants in this function were computed
2588 * based on theoretical maximum wire speed and thresholds were set based
2589 * on testing data as well as attempting to minimize response time
2590 * while increasing bulk throughput.
2591 * this functionality is controlled by the InterruptThrottleRate module
2592 * parameter (see e1000_param.c)
2593 **/
2594static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2595 u16 itr_setting, int packets, int bytes)
2596{
2597 unsigned int retval = itr_setting;
2598 struct e1000_hw *hw = &adapter->hw;
2599
2600 if (unlikely(hw->mac_type < e1000_82540))
2601 goto update_itr_done;
2602
2603 if (packets == 0)
2604 goto update_itr_done;
2605
2606 switch (itr_setting) {
2607 case lowest_latency:
2608 /* jumbo frames get bulk treatment*/
2609 if (bytes/packets > 8000)
2610 retval = bulk_latency;
2611 else if ((packets < 5) && (bytes > 512))
2612 retval = low_latency;
2613 break;
2614 case low_latency: /* 50 usec aka 20000 ints/s */
2615 if (bytes > 10000) {
2616 /* jumbo frames need bulk latency setting */
2617 if (bytes/packets > 8000)
2618 retval = bulk_latency;
2619 else if ((packets < 10) || ((bytes/packets) > 1200))
2620 retval = bulk_latency;
2621 else if ((packets > 35))
2622 retval = lowest_latency;
2623 } else if (bytes/packets > 2000)
2624 retval = bulk_latency;
2625 else if (packets <= 2 && bytes < 512)
2626 retval = lowest_latency;
2627 break;
2628 case bulk_latency: /* 250 usec aka 4000 ints/s */
2629 if (bytes > 25000) {
2630 if (packets > 35)
2631 retval = low_latency;
2632 } else if (bytes < 6000) {
2633 retval = low_latency;
2634 }
2635 break;
2636 }
2637
2638update_itr_done:
2639 return retval;
2640}
2641
2642static void e1000_set_itr(struct e1000_adapter *adapter)
2643{
2644 struct e1000_hw *hw = &adapter->hw;
2645 u16 current_itr;
2646 u32 new_itr = adapter->itr;
2647
2648 if (unlikely(hw->mac_type < e1000_82540))
2649 return;
2650
2651 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2652 if (unlikely(adapter->link_speed != SPEED_1000)) {
2653 current_itr = 0;
2654 new_itr = 4000;
2655 goto set_itr_now;
2656 }
2657
2658 adapter->tx_itr = e1000_update_itr(adapter,
2659 adapter->tx_itr,
2660 adapter->total_tx_packets,
2661 adapter->total_tx_bytes);
2662 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2663 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2664 adapter->tx_itr = low_latency;
2665
2666 adapter->rx_itr = e1000_update_itr(adapter,
2667 adapter->rx_itr,
2668 adapter->total_rx_packets,
2669 adapter->total_rx_bytes);
2670 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2671 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2672 adapter->rx_itr = low_latency;
2673
2674 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2675
2676 switch (current_itr) {
2677 /* counts and packets in update_itr are dependent on these numbers */
2678 case lowest_latency:
2679 new_itr = 70000;
2680 break;
2681 case low_latency:
2682 new_itr = 20000; /* aka hwitr = ~200 */
2683 break;
2684 case bulk_latency:
2685 new_itr = 4000;
2686 break;
2687 default:
2688 break;
2689 }
2690
2691set_itr_now:
2692 if (new_itr != adapter->itr) {
2693 /* this attempts to bias the interrupt rate towards Bulk
2694 * by adding intermediate steps when interrupt rate is
2695 * increasing */
2696 new_itr = new_itr > adapter->itr ?
2697 min(adapter->itr + (new_itr >> 2), new_itr) :
2698 new_itr;
2699 adapter->itr = new_itr;
2700 ew32(ITR, 1000000000 / (new_itr * 256));
2701 }
2702}
2703
2704#define E1000_TX_FLAGS_CSUM 0x00000001
2705#define E1000_TX_FLAGS_VLAN 0x00000002
2706#define E1000_TX_FLAGS_TSO 0x00000004
2707#define E1000_TX_FLAGS_IPV4 0x00000008
2708#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2709#define E1000_TX_FLAGS_VLAN_SHIFT 16
2710
2711static int e1000_tso(struct e1000_adapter *adapter,
2712 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2713{
2714 struct e1000_context_desc *context_desc;
2715 struct e1000_buffer *buffer_info;
2716 unsigned int i;
2717 u32 cmd_length = 0;
2718 u16 ipcse = 0, tucse, mss;
2719 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2720 int err;
2721
2722 if (skb_is_gso(skb)) {
2723 if (skb_header_cloned(skb)) {
2724 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2725 if (err)
2726 return err;
2727 }
2728
2729 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2730 mss = skb_shinfo(skb)->gso_size;
2731 if (skb->protocol == htons(ETH_P_IP)) {
2732 struct iphdr *iph = ip_hdr(skb);
2733 iph->tot_len = 0;
2734 iph->check = 0;
2735 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2736 iph->daddr, 0,
2737 IPPROTO_TCP,
2738 0);
2739 cmd_length = E1000_TXD_CMD_IP;
2740 ipcse = skb_transport_offset(skb) - 1;
2741 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2742 ipv6_hdr(skb)->payload_len = 0;
2743 tcp_hdr(skb)->check =
2744 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2745 &ipv6_hdr(skb)->daddr,
2746 0, IPPROTO_TCP, 0);
2747 ipcse = 0;
2748 }
2749 ipcss = skb_network_offset(skb);
2750 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2751 tucss = skb_transport_offset(skb);
2752 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2753 tucse = 0;
2754
2755 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2756 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2757
2758 i = tx_ring->next_to_use;
2759 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2760 buffer_info = &tx_ring->buffer_info[i];
2761
2762 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2763 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2764 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2765 context_desc->upper_setup.tcp_fields.tucss = tucss;
2766 context_desc->upper_setup.tcp_fields.tucso = tucso;
2767 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2768 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2769 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2770 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2771
2772 buffer_info->time_stamp = jiffies;
2773 buffer_info->next_to_watch = i;
2774
2775 if (++i == tx_ring->count) i = 0;
2776 tx_ring->next_to_use = i;
2777
2778 return true;
2779 }
2780 return false;
2781}
2782
2783static bool e1000_tx_csum(struct e1000_adapter *adapter,
2784 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2785{
2786 struct e1000_context_desc *context_desc;
2787 struct e1000_buffer *buffer_info;
2788 unsigned int i;
2789 u8 css;
2790 u32 cmd_len = E1000_TXD_CMD_DEXT;
2791
2792 if (skb->ip_summed != CHECKSUM_PARTIAL)
2793 return false;
2794
2795 switch (skb->protocol) {
2796 case cpu_to_be16(ETH_P_IP):
2797 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2798 cmd_len |= E1000_TXD_CMD_TCP;
2799 break;
2800 case cpu_to_be16(ETH_P_IPV6):
2801 /* XXX not handling all IPV6 headers */
2802 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2803 cmd_len |= E1000_TXD_CMD_TCP;
2804 break;
2805 default:
2806 if (unlikely(net_ratelimit()))
2807 e_warn(drv, "checksum_partial proto=%x!\n",
2808 skb->protocol);
2809 break;
2810 }
2811
2812 css = skb_checksum_start_offset(skb);
2813
2814 i = tx_ring->next_to_use;
2815 buffer_info = &tx_ring->buffer_info[i];
2816 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2817
2818 context_desc->lower_setup.ip_config = 0;
2819 context_desc->upper_setup.tcp_fields.tucss = css;
2820 context_desc->upper_setup.tcp_fields.tucso =
2821 css + skb->csum_offset;
2822 context_desc->upper_setup.tcp_fields.tucse = 0;
2823 context_desc->tcp_seg_setup.data = 0;
2824 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2825
2826 buffer_info->time_stamp = jiffies;
2827 buffer_info->next_to_watch = i;
2828
2829 if (unlikely(++i == tx_ring->count)) i = 0;
2830 tx_ring->next_to_use = i;
2831
2832 return true;
2833}
2834
2835#define E1000_MAX_TXD_PWR 12
2836#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2837
2838static int e1000_tx_map(struct e1000_adapter *adapter,
2839 struct e1000_tx_ring *tx_ring,
2840 struct sk_buff *skb, unsigned int first,
2841 unsigned int max_per_txd, unsigned int nr_frags,
2842 unsigned int mss)
2843{
2844 struct e1000_hw *hw = &adapter->hw;
2845 struct pci_dev *pdev = adapter->pdev;
2846 struct e1000_buffer *buffer_info;
2847 unsigned int len = skb_headlen(skb);
2848 unsigned int offset = 0, size, count = 0, i;
2849 unsigned int f;
2850
2851 i = tx_ring->next_to_use;
2852
2853 while (len) {
2854 buffer_info = &tx_ring->buffer_info[i];
2855 size = min(len, max_per_txd);
2856 /* Workaround for Controller erratum --
2857 * descriptor for non-tso packet in a linear SKB that follows a
2858 * tso gets written back prematurely before the data is fully
2859 * DMA'd to the controller */
2860 if (!skb->data_len && tx_ring->last_tx_tso &&
2861 !skb_is_gso(skb)) {
2862 tx_ring->last_tx_tso = 0;
2863 size -= 4;
2864 }
2865
2866 /* Workaround for premature desc write-backs
2867 * in TSO mode. Append 4-byte sentinel desc */
2868 if (unlikely(mss && !nr_frags && size == len && size > 8))
2869 size -= 4;
2870 /* work-around for errata 10 and it applies
2871 * to all controllers in PCI-X mode
2872 * The fix is to make sure that the first descriptor of a
2873 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2874 */
2875 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2876 (size > 2015) && count == 0))
2877 size = 2015;
2878
2879 /* Workaround for potential 82544 hang in PCI-X. Avoid
2880 * terminating buffers within evenly-aligned dwords. */
2881 if (unlikely(adapter->pcix_82544 &&
2882 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2883 size > 4))
2884 size -= 4;
2885
2886 buffer_info->length = size;
2887 /* set time_stamp *before* dma to help avoid a possible race */
2888 buffer_info->time_stamp = jiffies;
2889 buffer_info->mapped_as_page = false;
2890 buffer_info->dma = dma_map_single(&pdev->dev,
2891 skb->data + offset,
2892 size, DMA_TO_DEVICE);
2893 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2894 goto dma_error;
2895 buffer_info->next_to_watch = i;
2896
2897 len -= size;
2898 offset += size;
2899 count++;
2900 if (len) {
2901 i++;
2902 if (unlikely(i == tx_ring->count))
2903 i = 0;
2904 }
2905 }
2906
2907 for (f = 0; f < nr_frags; f++) {
2908 struct skb_frag_struct *frag;
2909
2910 frag = &skb_shinfo(skb)->frags[f];
2911 len = frag->size;
2912 offset = frag->page_offset;
2913
2914 while (len) {
2915 i++;
2916 if (unlikely(i == tx_ring->count))
2917 i = 0;
2918
2919 buffer_info = &tx_ring->buffer_info[i];
2920 size = min(len, max_per_txd);
2921 /* Workaround for premature desc write-backs
2922 * in TSO mode. Append 4-byte sentinel desc */
2923 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2924 size -= 4;
2925 /* Workaround for potential 82544 hang in PCI-X.
2926 * Avoid terminating buffers within evenly-aligned
2927 * dwords. */
2928 if (unlikely(adapter->pcix_82544 &&
2929 !((unsigned long)(page_to_phys(frag->page) + offset
2930 + size - 1) & 4) &&
2931 size > 4))
2932 size -= 4;
2933
2934 buffer_info->length = size;
2935 buffer_info->time_stamp = jiffies;
2936 buffer_info->mapped_as_page = true;
2937 buffer_info->dma = dma_map_page(&pdev->dev, frag->page,
2938 offset, size,
2939 DMA_TO_DEVICE);
2940 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2941 goto dma_error;
2942 buffer_info->next_to_watch = i;
2943
2944 len -= size;
2945 offset += size;
2946 count++;
2947 }
2948 }
2949
2950 tx_ring->buffer_info[i].skb = skb;
2951 tx_ring->buffer_info[first].next_to_watch = i;
2952
2953 return count;
2954
2955dma_error:
2956 dev_err(&pdev->dev, "TX DMA map failed\n");
2957 buffer_info->dma = 0;
2958 if (count)
2959 count--;
2960
2961 while (count--) {
2962 if (i==0)
2963 i += tx_ring->count;
2964 i--;
2965 buffer_info = &tx_ring->buffer_info[i];
2966 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2967 }
2968
2969 return 0;
2970}
2971
2972static void e1000_tx_queue(struct e1000_adapter *adapter,
2973 struct e1000_tx_ring *tx_ring, int tx_flags,
2974 int count)
2975{
2976 struct e1000_hw *hw = &adapter->hw;
2977 struct e1000_tx_desc *tx_desc = NULL;
2978 struct e1000_buffer *buffer_info;
2979 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2980 unsigned int i;
2981
2982 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2983 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2984 E1000_TXD_CMD_TSE;
2985 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2986
2987 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2988 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2989 }
2990
2991 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2992 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2993 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2994 }
2995
2996 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2997 txd_lower |= E1000_TXD_CMD_VLE;
2998 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2999 }
3000
3001 i = tx_ring->next_to_use;
3002
3003 while (count--) {
3004 buffer_info = &tx_ring->buffer_info[i];
3005 tx_desc = E1000_TX_DESC(*tx_ring, i);
3006 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3007 tx_desc->lower.data =
3008 cpu_to_le32(txd_lower | buffer_info->length);
3009 tx_desc->upper.data = cpu_to_le32(txd_upper);
3010 if (unlikely(++i == tx_ring->count)) i = 0;
3011 }
3012
3013 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3014
3015 /* Force memory writes to complete before letting h/w
3016 * know there are new descriptors to fetch. (Only
3017 * applicable for weak-ordered memory model archs,
3018 * such as IA-64). */
3019 wmb();
3020
3021 tx_ring->next_to_use = i;
3022 writel(i, hw->hw_addr + tx_ring->tdt);
3023 /* we need this if more than one processor can write to our tail
3024 * at a time, it syncronizes IO on IA64/Altix systems */
3025 mmiowb();
3026}
3027
3028/**
3029 * 82547 workaround to avoid controller hang in half-duplex environment.
3030 * The workaround is to avoid queuing a large packet that would span
3031 * the internal Tx FIFO ring boundary by notifying the stack to resend
3032 * the packet at a later time. This gives the Tx FIFO an opportunity to
3033 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3034 * to the beginning of the Tx FIFO.
3035 **/
3036
3037#define E1000_FIFO_HDR 0x10
3038#define E1000_82547_PAD_LEN 0x3E0
3039
3040static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3041 struct sk_buff *skb)
3042{
3043 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3044 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3045
3046 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3047
3048 if (adapter->link_duplex != HALF_DUPLEX)
3049 goto no_fifo_stall_required;
3050
3051 if (atomic_read(&adapter->tx_fifo_stall))
3052 return 1;
3053
3054 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3055 atomic_set(&adapter->tx_fifo_stall, 1);
3056 return 1;
3057 }
3058
3059no_fifo_stall_required:
3060 adapter->tx_fifo_head += skb_fifo_len;
3061 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3062 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3063 return 0;
3064}
3065
3066static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3067{
3068 struct e1000_adapter *adapter = netdev_priv(netdev);
3069 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3070
3071 netif_stop_queue(netdev);
3072 /* Herbert's original patch had:
3073 * smp_mb__after_netif_stop_queue();
3074 * but since that doesn't exist yet, just open code it. */
3075 smp_mb();
3076
3077 /* We need to check again in a case another CPU has just
3078 * made room available. */
3079 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3080 return -EBUSY;
3081
3082 /* A reprieve! */
3083 netif_start_queue(netdev);
3084 ++adapter->restart_queue;
3085 return 0;
3086}
3087
3088static int e1000_maybe_stop_tx(struct net_device *netdev,
3089 struct e1000_tx_ring *tx_ring, int size)
3090{
3091 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3092 return 0;
3093 return __e1000_maybe_stop_tx(netdev, size);
3094}
3095
3096#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3097static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3098 struct net_device *netdev)
3099{
3100 struct e1000_adapter *adapter = netdev_priv(netdev);
3101 struct e1000_hw *hw = &adapter->hw;
3102 struct e1000_tx_ring *tx_ring;
3103 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3104 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3105 unsigned int tx_flags = 0;
3106 unsigned int len = skb_headlen(skb);
3107 unsigned int nr_frags;
3108 unsigned int mss;
3109 int count = 0;
3110 int tso;
3111 unsigned int f;
3112
3113 /* This goes back to the question of how to logically map a tx queue
3114 * to a flow. Right now, performance is impacted slightly negatively
3115 * if using multiple tx queues. If the stack breaks away from a
3116 * single qdisc implementation, we can look at this again. */
3117 tx_ring = adapter->tx_ring;
3118
3119 if (unlikely(skb->len <= 0)) {
3120 dev_kfree_skb_any(skb);
3121 return NETDEV_TX_OK;
3122 }
3123
3124 mss = skb_shinfo(skb)->gso_size;
3125 /* The controller does a simple calculation to
3126 * make sure there is enough room in the FIFO before
3127 * initiating the DMA for each buffer. The calc is:
3128 * 4 = ceil(buffer len/mss). To make sure we don't
3129 * overrun the FIFO, adjust the max buffer len if mss
3130 * drops. */
3131 if (mss) {
3132 u8 hdr_len;
3133 max_per_txd = min(mss << 2, max_per_txd);
3134 max_txd_pwr = fls(max_per_txd) - 1;
3135
3136 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3137 if (skb->data_len && hdr_len == len) {
3138 switch (hw->mac_type) {
3139 unsigned int pull_size;
3140 case e1000_82544:
3141 /* Make sure we have room to chop off 4 bytes,
3142 * and that the end alignment will work out to
3143 * this hardware's requirements
3144 * NOTE: this is a TSO only workaround
3145 * if end byte alignment not correct move us
3146 * into the next dword */
3147 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3148 break;
3149 /* fall through */
3150 pull_size = min((unsigned int)4, skb->data_len);
3151 if (!__pskb_pull_tail(skb, pull_size)) {
3152 e_err(drv, "__pskb_pull_tail "
3153 "failed.\n");
3154 dev_kfree_skb_any(skb);
3155 return NETDEV_TX_OK;
3156 }
3157 len = skb_headlen(skb);
3158 break;
3159 default:
3160 /* do nothing */
3161 break;
3162 }
3163 }
3164 }
3165
3166 /* reserve a descriptor for the offload context */
3167 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3168 count++;
3169 count++;
3170
3171 /* Controller Erratum workaround */
3172 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3173 count++;
3174
3175 count += TXD_USE_COUNT(len, max_txd_pwr);
3176
3177 if (adapter->pcix_82544)
3178 count++;
3179
3180 /* work-around for errata 10 and it applies to all controllers
3181 * in PCI-X mode, so add one more descriptor to the count
3182 */
3183 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3184 (len > 2015)))
3185 count++;
3186
3187 nr_frags = skb_shinfo(skb)->nr_frags;
3188 for (f = 0; f < nr_frags; f++)
3189 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3190 max_txd_pwr);
3191 if (adapter->pcix_82544)
3192 count += nr_frags;
3193
3194 /* need: count + 2 desc gap to keep tail from touching
3195 * head, otherwise try next time */
3196 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3197 return NETDEV_TX_BUSY;
3198
3199 if (unlikely(hw->mac_type == e1000_82547)) {
3200 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3201 netif_stop_queue(netdev);
3202 if (!test_bit(__E1000_DOWN, &adapter->flags))
3203 mod_timer(&adapter->tx_fifo_stall_timer,
3204 jiffies + 1);
3205 return NETDEV_TX_BUSY;
3206 }
3207 }
3208
3209 if (vlan_tx_tag_present(skb)) {
3210 tx_flags |= E1000_TX_FLAGS_VLAN;
3211 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3212 }
3213
3214 first = tx_ring->next_to_use;
3215
3216 tso = e1000_tso(adapter, tx_ring, skb);
3217 if (tso < 0) {
3218 dev_kfree_skb_any(skb);
3219 return NETDEV_TX_OK;
3220 }
3221
3222 if (likely(tso)) {
3223 if (likely(hw->mac_type != e1000_82544))
3224 tx_ring->last_tx_tso = 1;
3225 tx_flags |= E1000_TX_FLAGS_TSO;
3226 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3227 tx_flags |= E1000_TX_FLAGS_CSUM;
3228
3229 if (likely(skb->protocol == htons(ETH_P_IP)))
3230 tx_flags |= E1000_TX_FLAGS_IPV4;
3231
3232 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3233 nr_frags, mss);
3234
3235 if (count) {
3236 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3237 /* Make sure there is space in the ring for the next send. */
3238 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3239
3240 } else {
3241 dev_kfree_skb_any(skb);
3242 tx_ring->buffer_info[first].time_stamp = 0;
3243 tx_ring->next_to_use = first;
3244 }
3245
3246 return NETDEV_TX_OK;
3247}
3248
3249/**
3250 * e1000_tx_timeout - Respond to a Tx Hang
3251 * @netdev: network interface device structure
3252 **/
3253
3254static void e1000_tx_timeout(struct net_device *netdev)
3255{
3256 struct e1000_adapter *adapter = netdev_priv(netdev);
3257
3258 /* Do the reset outside of interrupt context */
3259 adapter->tx_timeout_count++;
3260 schedule_work(&adapter->reset_task);
3261}
3262
3263static void e1000_reset_task(struct work_struct *work)
3264{
3265 struct e1000_adapter *adapter =
3266 container_of(work, struct e1000_adapter, reset_task);
3267
3268 e1000_reinit_safe(adapter);
3269}
3270
3271/**
3272 * e1000_get_stats - Get System Network Statistics
3273 * @netdev: network interface device structure
3274 *
3275 * Returns the address of the device statistics structure.
3276 * The statistics are actually updated from the timer callback.
3277 **/
3278
3279static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3280{
3281 /* only return the current stats */
3282 return &netdev->stats;
3283}
3284
3285/**
3286 * e1000_change_mtu - Change the Maximum Transfer Unit
3287 * @netdev: network interface device structure
3288 * @new_mtu: new value for maximum frame size
3289 *
3290 * Returns 0 on success, negative on failure
3291 **/
3292
3293static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3294{
3295 struct e1000_adapter *adapter = netdev_priv(netdev);
3296 struct e1000_hw *hw = &adapter->hw;
3297 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3298
3299 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3300 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3301 e_err(probe, "Invalid MTU setting\n");
3302 return -EINVAL;
3303 }
3304
3305 /* Adapter-specific max frame size limits. */
3306 switch (hw->mac_type) {
3307 case e1000_undefined ... e1000_82542_rev2_1:
3308 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3309 e_err(probe, "Jumbo Frames not supported.\n");
3310 return -EINVAL;
3311 }
3312 break;
3313 default:
3314 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3315 break;
3316 }
3317
3318 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3319 msleep(1);
3320 /* e1000_down has a dependency on max_frame_size */
3321 hw->max_frame_size = max_frame;
3322 if (netif_running(netdev))
3323 e1000_down(adapter);
3324
3325 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3326 * means we reserve 2 more, this pushes us to allocate from the next
3327 * larger slab size.
3328 * i.e. RXBUFFER_2048 --> size-4096 slab
3329 * however with the new *_jumbo_rx* routines, jumbo receives will use
3330 * fragmented skbs */
3331
3332 if (max_frame <= E1000_RXBUFFER_2048)
3333 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3334 else
3335#if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3336 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3337#elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3338 adapter->rx_buffer_len = PAGE_SIZE;
3339#endif
3340
3341 /* adjust allocation if LPE protects us, and we aren't using SBP */
3342 if (!hw->tbi_compatibility_on &&
3343 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3344 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3345 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3346
3347 pr_info("%s changing MTU from %d to %d\n",
3348 netdev->name, netdev->mtu, new_mtu);
3349 netdev->mtu = new_mtu;
3350
3351 if (netif_running(netdev))
3352 e1000_up(adapter);
3353 else
3354 e1000_reset(adapter);
3355
3356 clear_bit(__E1000_RESETTING, &adapter->flags);
3357
3358 return 0;
3359}
3360
3361/**
3362 * e1000_update_stats - Update the board statistics counters
3363 * @adapter: board private structure
3364 **/
3365
3366void e1000_update_stats(struct e1000_adapter *adapter)
3367{
3368 struct net_device *netdev = adapter->netdev;
3369 struct e1000_hw *hw = &adapter->hw;
3370 struct pci_dev *pdev = adapter->pdev;
3371 unsigned long flags;
3372 u16 phy_tmp;
3373
3374#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3375
3376 /*
3377 * Prevent stats update while adapter is being reset, or if the pci
3378 * connection is down.
3379 */
3380 if (adapter->link_speed == 0)
3381 return;
3382 if (pci_channel_offline(pdev))
3383 return;
3384
3385 spin_lock_irqsave(&adapter->stats_lock, flags);
3386
3387 /* these counters are modified from e1000_tbi_adjust_stats,
3388 * called from the interrupt context, so they must only
3389 * be written while holding adapter->stats_lock
3390 */
3391
3392 adapter->stats.crcerrs += er32(CRCERRS);
3393 adapter->stats.gprc += er32(GPRC);
3394 adapter->stats.gorcl += er32(GORCL);
3395 adapter->stats.gorch += er32(GORCH);
3396 adapter->stats.bprc += er32(BPRC);
3397 adapter->stats.mprc += er32(MPRC);
3398 adapter->stats.roc += er32(ROC);
3399
3400 adapter->stats.prc64 += er32(PRC64);
3401 adapter->stats.prc127 += er32(PRC127);
3402 adapter->stats.prc255 += er32(PRC255);
3403 adapter->stats.prc511 += er32(PRC511);
3404 adapter->stats.prc1023 += er32(PRC1023);
3405 adapter->stats.prc1522 += er32(PRC1522);
3406
3407 adapter->stats.symerrs += er32(SYMERRS);
3408 adapter->stats.mpc += er32(MPC);
3409 adapter->stats.scc += er32(SCC);
3410 adapter->stats.ecol += er32(ECOL);
3411 adapter->stats.mcc += er32(MCC);
3412 adapter->stats.latecol += er32(LATECOL);
3413 adapter->stats.dc += er32(DC);
3414 adapter->stats.sec += er32(SEC);
3415 adapter->stats.rlec += er32(RLEC);
3416 adapter->stats.xonrxc += er32(XONRXC);
3417 adapter->stats.xontxc += er32(XONTXC);
3418 adapter->stats.xoffrxc += er32(XOFFRXC);
3419 adapter->stats.xofftxc += er32(XOFFTXC);
3420 adapter->stats.fcruc += er32(FCRUC);
3421 adapter->stats.gptc += er32(GPTC);
3422 adapter->stats.gotcl += er32(GOTCL);
3423 adapter->stats.gotch += er32(GOTCH);
3424 adapter->stats.rnbc += er32(RNBC);
3425 adapter->stats.ruc += er32(RUC);
3426 adapter->stats.rfc += er32(RFC);
3427 adapter->stats.rjc += er32(RJC);
3428 adapter->stats.torl += er32(TORL);
3429 adapter->stats.torh += er32(TORH);
3430 adapter->stats.totl += er32(TOTL);
3431 adapter->stats.toth += er32(TOTH);
3432 adapter->stats.tpr += er32(TPR);
3433
3434 adapter->stats.ptc64 += er32(PTC64);
3435 adapter->stats.ptc127 += er32(PTC127);
3436 adapter->stats.ptc255 += er32(PTC255);
3437 adapter->stats.ptc511 += er32(PTC511);
3438 adapter->stats.ptc1023 += er32(PTC1023);
3439 adapter->stats.ptc1522 += er32(PTC1522);
3440
3441 adapter->stats.mptc += er32(MPTC);
3442 adapter->stats.bptc += er32(BPTC);
3443
3444 /* used for adaptive IFS */
3445
3446 hw->tx_packet_delta = er32(TPT);
3447 adapter->stats.tpt += hw->tx_packet_delta;
3448 hw->collision_delta = er32(COLC);
3449 adapter->stats.colc += hw->collision_delta;
3450
3451 if (hw->mac_type >= e1000_82543) {
3452 adapter->stats.algnerrc += er32(ALGNERRC);
3453 adapter->stats.rxerrc += er32(RXERRC);
3454 adapter->stats.tncrs += er32(TNCRS);
3455 adapter->stats.cexterr += er32(CEXTERR);
3456 adapter->stats.tsctc += er32(TSCTC);
3457 adapter->stats.tsctfc += er32(TSCTFC);
3458 }
3459
3460 /* Fill out the OS statistics structure */
3461 netdev->stats.multicast = adapter->stats.mprc;
3462 netdev->stats.collisions = adapter->stats.colc;
3463
3464 /* Rx Errors */
3465
3466 /* RLEC on some newer hardware can be incorrect so build
3467 * our own version based on RUC and ROC */
3468 netdev->stats.rx_errors = adapter->stats.rxerrc +
3469 adapter->stats.crcerrs + adapter->stats.algnerrc +
3470 adapter->stats.ruc + adapter->stats.roc +
3471 adapter->stats.cexterr;
3472 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3473 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3474 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3475 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3476 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3477
3478 /* Tx Errors */
3479 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3480 netdev->stats.tx_errors = adapter->stats.txerrc;
3481 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3482 netdev->stats.tx_window_errors = adapter->stats.latecol;
3483 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3484 if (hw->bad_tx_carr_stats_fd &&
3485 adapter->link_duplex == FULL_DUPLEX) {
3486 netdev->stats.tx_carrier_errors = 0;
3487 adapter->stats.tncrs = 0;
3488 }
3489
3490 /* Tx Dropped needs to be maintained elsewhere */
3491
3492 /* Phy Stats */
3493 if (hw->media_type == e1000_media_type_copper) {
3494 if ((adapter->link_speed == SPEED_1000) &&
3495 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3496 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3497 adapter->phy_stats.idle_errors += phy_tmp;
3498 }
3499
3500 if ((hw->mac_type <= e1000_82546) &&
3501 (hw->phy_type == e1000_phy_m88) &&
3502 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3503 adapter->phy_stats.receive_errors += phy_tmp;
3504 }
3505
3506 /* Management Stats */
3507 if (hw->has_smbus) {
3508 adapter->stats.mgptc += er32(MGTPTC);
3509 adapter->stats.mgprc += er32(MGTPRC);
3510 adapter->stats.mgpdc += er32(MGTPDC);
3511 }
3512
3513 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3514}
3515
3516/**
3517 * e1000_intr - Interrupt Handler
3518 * @irq: interrupt number
3519 * @data: pointer to a network interface device structure
3520 **/
3521
3522static irqreturn_t e1000_intr(int irq, void *data)
3523{
3524 struct net_device *netdev = data;
3525 struct e1000_adapter *adapter = netdev_priv(netdev);
3526 struct e1000_hw *hw = &adapter->hw;
3527 u32 icr = er32(ICR);
3528
3529 if (unlikely((!icr)))
3530 return IRQ_NONE; /* Not our interrupt */
3531
3532 /*
3533 * we might have caused the interrupt, but the above
3534 * read cleared it, and just in case the driver is
3535 * down there is nothing to do so return handled
3536 */
3537 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3538 return IRQ_HANDLED;
3539
3540 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3541 hw->get_link_status = 1;
3542 /* guard against interrupt when we're going down */
3543 if (!test_bit(__E1000_DOWN, &adapter->flags))
3544 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3545 }
3546
3547 /* disable interrupts, without the synchronize_irq bit */
3548 ew32(IMC, ~0);
3549 E1000_WRITE_FLUSH();
3550
3551 if (likely(napi_schedule_prep(&adapter->napi))) {
3552 adapter->total_tx_bytes = 0;
3553 adapter->total_tx_packets = 0;
3554 adapter->total_rx_bytes = 0;
3555 adapter->total_rx_packets = 0;
3556 __napi_schedule(&adapter->napi);
3557 } else {
3558 /* this really should not happen! if it does it is basically a
3559 * bug, but not a hard error, so enable ints and continue */
3560 if (!test_bit(__E1000_DOWN, &adapter->flags))
3561 e1000_irq_enable(adapter);
3562 }
3563
3564 return IRQ_HANDLED;
3565}
3566
3567/**
3568 * e1000_clean - NAPI Rx polling callback
3569 * @adapter: board private structure
3570 **/
3571static int e1000_clean(struct napi_struct *napi, int budget)
3572{
3573 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3574 int tx_clean_complete = 0, work_done = 0;
3575
3576 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3577
3578 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3579
3580 if (!tx_clean_complete)
3581 work_done = budget;
3582
3583 /* If budget not fully consumed, exit the polling mode */
3584 if (work_done < budget) {
3585 if (likely(adapter->itr_setting & 3))
3586 e1000_set_itr(adapter);
3587 napi_complete(napi);
3588 if (!test_bit(__E1000_DOWN, &adapter->flags))
3589 e1000_irq_enable(adapter);
3590 }
3591
3592 return work_done;
3593}
3594
3595/**
3596 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3597 * @adapter: board private structure
3598 **/
3599static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3600 struct e1000_tx_ring *tx_ring)
3601{
3602 struct e1000_hw *hw = &adapter->hw;
3603 struct net_device *netdev = adapter->netdev;
3604 struct e1000_tx_desc *tx_desc, *eop_desc;
3605 struct e1000_buffer *buffer_info;
3606 unsigned int i, eop;
3607 unsigned int count = 0;
3608 unsigned int total_tx_bytes=0, total_tx_packets=0;
3609
3610 i = tx_ring->next_to_clean;
3611 eop = tx_ring->buffer_info[i].next_to_watch;
3612 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3613
3614 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3615 (count < tx_ring->count)) {
3616 bool cleaned = false;
3617 rmb(); /* read buffer_info after eop_desc */
3618 for ( ; !cleaned; count++) {
3619 tx_desc = E1000_TX_DESC(*tx_ring, i);
3620 buffer_info = &tx_ring->buffer_info[i];
3621 cleaned = (i == eop);
3622
3623 if (cleaned) {
3624 struct sk_buff *skb = buffer_info->skb;
3625 unsigned int segs, bytecount;
3626 segs = skb_shinfo(skb)->gso_segs ?: 1;
3627 /* multiply data chunks by size of headers */
3628 bytecount = ((segs - 1) * skb_headlen(skb)) +
3629 skb->len;
3630 total_tx_packets += segs;
3631 total_tx_bytes += bytecount;
3632 }
3633 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3634 tx_desc->upper.data = 0;
3635
3636 if (unlikely(++i == tx_ring->count)) i = 0;
3637 }
3638
3639 eop = tx_ring->buffer_info[i].next_to_watch;
3640 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3641 }
3642
3643 tx_ring->next_to_clean = i;
3644
3645#define TX_WAKE_THRESHOLD 32
3646 if (unlikely(count && netif_carrier_ok(netdev) &&
3647 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3648 /* Make sure that anybody stopping the queue after this
3649 * sees the new next_to_clean.
3650 */
3651 smp_mb();
3652
3653 if (netif_queue_stopped(netdev) &&
3654 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3655 netif_wake_queue(netdev);
3656 ++adapter->restart_queue;
3657 }
3658 }
3659
3660 if (adapter->detect_tx_hung) {
3661 /* Detect a transmit hang in hardware, this serializes the
3662 * check with the clearing of time_stamp and movement of i */
3663 adapter->detect_tx_hung = false;
3664 if (tx_ring->buffer_info[eop].time_stamp &&
3665 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3666 (adapter->tx_timeout_factor * HZ)) &&
3667 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3668
3669 /* detected Tx unit hang */
3670 e_err(drv, "Detected Tx Unit Hang\n"
3671 " Tx Queue <%lu>\n"
3672 " TDH <%x>\n"
3673 " TDT <%x>\n"
3674 " next_to_use <%x>\n"
3675 " next_to_clean <%x>\n"
3676 "buffer_info[next_to_clean]\n"
3677 " time_stamp <%lx>\n"
3678 " next_to_watch <%x>\n"
3679 " jiffies <%lx>\n"
3680 " next_to_watch.status <%x>\n",
3681 (unsigned long)((tx_ring - adapter->tx_ring) /
3682 sizeof(struct e1000_tx_ring)),
3683 readl(hw->hw_addr + tx_ring->tdh),
3684 readl(hw->hw_addr + tx_ring->tdt),
3685 tx_ring->next_to_use,
3686 tx_ring->next_to_clean,
3687 tx_ring->buffer_info[eop].time_stamp,
3688 eop,
3689 jiffies,
3690 eop_desc->upper.fields.status);
3691 netif_stop_queue(netdev);
3692 }
3693 }
3694 adapter->total_tx_bytes += total_tx_bytes;
3695 adapter->total_tx_packets += total_tx_packets;
3696 netdev->stats.tx_bytes += total_tx_bytes;
3697 netdev->stats.tx_packets += total_tx_packets;
3698 return count < tx_ring->count;
3699}
3700
3701/**
3702 * e1000_rx_checksum - Receive Checksum Offload for 82543
3703 * @adapter: board private structure
3704 * @status_err: receive descriptor status and error fields
3705 * @csum: receive descriptor csum field
3706 * @sk_buff: socket buffer with received data
3707 **/
3708
3709static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3710 u32 csum, struct sk_buff *skb)
3711{
3712 struct e1000_hw *hw = &adapter->hw;
3713 u16 status = (u16)status_err;
3714 u8 errors = (u8)(status_err >> 24);
3715
3716 skb_checksum_none_assert(skb);
3717
3718 /* 82543 or newer only */
3719 if (unlikely(hw->mac_type < e1000_82543)) return;
3720 /* Ignore Checksum bit is set */
3721 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3722 /* TCP/UDP checksum error bit is set */
3723 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3724 /* let the stack verify checksum errors */
3725 adapter->hw_csum_err++;
3726 return;
3727 }
3728 /* TCP/UDP Checksum has not been calculated */
3729 if (!(status & E1000_RXD_STAT_TCPCS))
3730 return;
3731
3732 /* It must be a TCP or UDP packet with a valid checksum */
3733 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3734 /* TCP checksum is good */
3735 skb->ip_summed = CHECKSUM_UNNECESSARY;
3736 }
3737 adapter->hw_csum_good++;
3738}
3739
3740/**
3741 * e1000_consume_page - helper function
3742 **/
3743static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3744 u16 length)
3745{
3746 bi->page = NULL;
3747 skb->len += length;
3748 skb->data_len += length;
3749 skb->truesize += length;
3750}
3751
3752/**
3753 * e1000_receive_skb - helper function to handle rx indications
3754 * @adapter: board private structure
3755 * @status: descriptor status field as written by hardware
3756 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3757 * @skb: pointer to sk_buff to be indicated to stack
3758 */
3759static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3760 __le16 vlan, struct sk_buff *skb)
3761{
3762 skb->protocol = eth_type_trans(skb, adapter->netdev);
3763
3764 if (status & E1000_RXD_STAT_VP) {
3765 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3766
3767 __vlan_hwaccel_put_tag(skb, vid);
3768 }
3769 napi_gro_receive(&adapter->napi, skb);
3770}
3771
3772/**
3773 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3774 * @adapter: board private structure
3775 * @rx_ring: ring to clean
3776 * @work_done: amount of napi work completed this call
3777 * @work_to_do: max amount of work allowed for this call to do
3778 *
3779 * the return value indicates whether actual cleaning was done, there
3780 * is no guarantee that everything was cleaned
3781 */
3782static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3783 struct e1000_rx_ring *rx_ring,
3784 int *work_done, int work_to_do)
3785{
3786 struct e1000_hw *hw = &adapter->hw;
3787 struct net_device *netdev = adapter->netdev;
3788 struct pci_dev *pdev = adapter->pdev;
3789 struct e1000_rx_desc *rx_desc, *next_rxd;
3790 struct e1000_buffer *buffer_info, *next_buffer;
3791 unsigned long irq_flags;
3792 u32 length;
3793 unsigned int i;
3794 int cleaned_count = 0;
3795 bool cleaned = false;
3796 unsigned int total_rx_bytes=0, total_rx_packets=0;
3797
3798 i = rx_ring->next_to_clean;
3799 rx_desc = E1000_RX_DESC(*rx_ring, i);
3800 buffer_info = &rx_ring->buffer_info[i];
3801
3802 while (rx_desc->status & E1000_RXD_STAT_DD) {
3803 struct sk_buff *skb;
3804 u8 status;
3805
3806 if (*work_done >= work_to_do)
3807 break;
3808 (*work_done)++;
3809 rmb(); /* read descriptor and rx_buffer_info after status DD */
3810
3811 status = rx_desc->status;
3812 skb = buffer_info->skb;
3813 buffer_info->skb = NULL;
3814
3815 if (++i == rx_ring->count) i = 0;
3816 next_rxd = E1000_RX_DESC(*rx_ring, i);
3817 prefetch(next_rxd);
3818
3819 next_buffer = &rx_ring->buffer_info[i];
3820
3821 cleaned = true;
3822 cleaned_count++;
3823 dma_unmap_page(&pdev->dev, buffer_info->dma,
3824 buffer_info->length, DMA_FROM_DEVICE);
3825 buffer_info->dma = 0;
3826
3827 length = le16_to_cpu(rx_desc->length);
3828
3829 /* errors is only valid for DD + EOP descriptors */
3830 if (unlikely((status & E1000_RXD_STAT_EOP) &&
3831 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
3832 u8 last_byte = *(skb->data + length - 1);
3833 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3834 last_byte)) {
3835 spin_lock_irqsave(&adapter->stats_lock,
3836 irq_flags);
3837 e1000_tbi_adjust_stats(hw, &adapter->stats,
3838 length, skb->data);
3839 spin_unlock_irqrestore(&adapter->stats_lock,
3840 irq_flags);
3841 length--;
3842 } else {
3843 /* recycle both page and skb */
3844 buffer_info->skb = skb;
3845 /* an error means any chain goes out the window
3846 * too */
3847 if (rx_ring->rx_skb_top)
3848 dev_kfree_skb(rx_ring->rx_skb_top);
3849 rx_ring->rx_skb_top = NULL;
3850 goto next_desc;
3851 }
3852 }
3853
3854#define rxtop rx_ring->rx_skb_top
3855 if (!(status & E1000_RXD_STAT_EOP)) {
3856 /* this descriptor is only the beginning (or middle) */
3857 if (!rxtop) {
3858 /* this is the beginning of a chain */
3859 rxtop = skb;
3860 skb_fill_page_desc(rxtop, 0, buffer_info->page,
3861 0, length);
3862 } else {
3863 /* this is the middle of a chain */
3864 skb_fill_page_desc(rxtop,
3865 skb_shinfo(rxtop)->nr_frags,
3866 buffer_info->page, 0, length);
3867 /* re-use the skb, only consumed the page */
3868 buffer_info->skb = skb;
3869 }
3870 e1000_consume_page(buffer_info, rxtop, length);
3871 goto next_desc;
3872 } else {
3873 if (rxtop) {
3874 /* end of the chain */
3875 skb_fill_page_desc(rxtop,
3876 skb_shinfo(rxtop)->nr_frags,
3877 buffer_info->page, 0, length);
3878 /* re-use the current skb, we only consumed the
3879 * page */
3880 buffer_info->skb = skb;
3881 skb = rxtop;
3882 rxtop = NULL;
3883 e1000_consume_page(buffer_info, skb, length);
3884 } else {
3885 /* no chain, got EOP, this buf is the packet
3886 * copybreak to save the put_page/alloc_page */
3887 if (length <= copybreak &&
3888 skb_tailroom(skb) >= length) {
3889 u8 *vaddr;
3890 vaddr = kmap_atomic(buffer_info->page,
3891 KM_SKB_DATA_SOFTIRQ);
3892 memcpy(skb_tail_pointer(skb), vaddr, length);
3893 kunmap_atomic(vaddr,
3894 KM_SKB_DATA_SOFTIRQ);
3895 /* re-use the page, so don't erase
3896 * buffer_info->page */
3897 skb_put(skb, length);
3898 } else {
3899 skb_fill_page_desc(skb, 0,
3900 buffer_info->page, 0,
3901 length);
3902 e1000_consume_page(buffer_info, skb,
3903 length);
3904 }
3905 }
3906 }
3907
3908 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3909 e1000_rx_checksum(adapter,
3910 (u32)(status) |
3911 ((u32)(rx_desc->errors) << 24),
3912 le16_to_cpu(rx_desc->csum), skb);
3913
3914 pskb_trim(skb, skb->len - 4);
3915
3916 /* probably a little skewed due to removing CRC */
3917 total_rx_bytes += skb->len;
3918 total_rx_packets++;
3919
3920 /* eth type trans needs skb->data to point to something */
3921 if (!pskb_may_pull(skb, ETH_HLEN)) {
3922 e_err(drv, "pskb_may_pull failed.\n");
3923 dev_kfree_skb(skb);
3924 goto next_desc;
3925 }
3926
3927 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3928
3929next_desc:
3930 rx_desc->status = 0;
3931
3932 /* return some buffers to hardware, one at a time is too slow */
3933 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3934 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3935 cleaned_count = 0;
3936 }
3937
3938 /* use prefetched values */
3939 rx_desc = next_rxd;
3940 buffer_info = next_buffer;
3941 }
3942 rx_ring->next_to_clean = i;
3943
3944 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3945 if (cleaned_count)
3946 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3947
3948 adapter->total_rx_packets += total_rx_packets;
3949 adapter->total_rx_bytes += total_rx_bytes;
3950 netdev->stats.rx_bytes += total_rx_bytes;
3951 netdev->stats.rx_packets += total_rx_packets;
3952 return cleaned;
3953}
3954
3955/*
3956 * this should improve performance for small packets with large amounts
3957 * of reassembly being done in the stack
3958 */
3959static void e1000_check_copybreak(struct net_device *netdev,
3960 struct e1000_buffer *buffer_info,
3961 u32 length, struct sk_buff **skb)
3962{
3963 struct sk_buff *new_skb;
3964
3965 if (length > copybreak)
3966 return;
3967
3968 new_skb = netdev_alloc_skb_ip_align(netdev, length);
3969 if (!new_skb)
3970 return;
3971
3972 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
3973 (*skb)->data - NET_IP_ALIGN,
3974 length + NET_IP_ALIGN);
3975 /* save the skb in buffer_info as good */
3976 buffer_info->skb = *skb;
3977 *skb = new_skb;
3978}
3979
3980/**
3981 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3982 * @adapter: board private structure
3983 * @rx_ring: ring to clean
3984 * @work_done: amount of napi work completed this call
3985 * @work_to_do: max amount of work allowed for this call to do
3986 */
3987static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3988 struct e1000_rx_ring *rx_ring,
3989 int *work_done, int work_to_do)
3990{
3991 struct e1000_hw *hw = &adapter->hw;
3992 struct net_device *netdev = adapter->netdev;
3993 struct pci_dev *pdev = adapter->pdev;
3994 struct e1000_rx_desc *rx_desc, *next_rxd;
3995 struct e1000_buffer *buffer_info, *next_buffer;
3996 unsigned long flags;
3997 u32 length;
3998 unsigned int i;
3999 int cleaned_count = 0;
4000 bool cleaned = false;
4001 unsigned int total_rx_bytes=0, total_rx_packets=0;
4002
4003 i = rx_ring->next_to_clean;
4004 rx_desc = E1000_RX_DESC(*rx_ring, i);
4005 buffer_info = &rx_ring->buffer_info[i];
4006
4007 while (rx_desc->status & E1000_RXD_STAT_DD) {
4008 struct sk_buff *skb;
4009 u8 status;
4010
4011 if (*work_done >= work_to_do)
4012 break;
4013 (*work_done)++;
4014 rmb(); /* read descriptor and rx_buffer_info after status DD */
4015
4016 status = rx_desc->status;
4017 skb = buffer_info->skb;
4018 buffer_info->skb = NULL;
4019
4020 prefetch(skb->data - NET_IP_ALIGN);
4021
4022 if (++i == rx_ring->count) i = 0;
4023 next_rxd = E1000_RX_DESC(*rx_ring, i);
4024 prefetch(next_rxd);
4025
4026 next_buffer = &rx_ring->buffer_info[i];
4027
4028 cleaned = true;
4029 cleaned_count++;
4030 dma_unmap_single(&pdev->dev, buffer_info->dma,
4031 buffer_info->length, DMA_FROM_DEVICE);
4032 buffer_info->dma = 0;
4033
4034 length = le16_to_cpu(rx_desc->length);
4035 /* !EOP means multiple descriptors were used to store a single
4036 * packet, if thats the case we need to toss it. In fact, we
4037 * to toss every packet with the EOP bit clear and the next
4038 * frame that _does_ have the EOP bit set, as it is by
4039 * definition only a frame fragment
4040 */
4041 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4042 adapter->discarding = true;
4043
4044 if (adapter->discarding) {
4045 /* All receives must fit into a single buffer */
4046 e_dbg("Receive packet consumed multiple buffers\n");
4047 /* recycle */
4048 buffer_info->skb = skb;
4049 if (status & E1000_RXD_STAT_EOP)
4050 adapter->discarding = false;
4051 goto next_desc;
4052 }
4053
4054 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4055 u8 last_byte = *(skb->data + length - 1);
4056 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4057 last_byte)) {
4058 spin_lock_irqsave(&adapter->stats_lock, flags);
4059 e1000_tbi_adjust_stats(hw, &adapter->stats,
4060 length, skb->data);
4061 spin_unlock_irqrestore(&adapter->stats_lock,
4062 flags);
4063 length--;
4064 } else {
4065 /* recycle */
4066 buffer_info->skb = skb;
4067 goto next_desc;
4068 }
4069 }
4070
4071 /* adjust length to remove Ethernet CRC, this must be
4072 * done after the TBI_ACCEPT workaround above */
4073 length -= 4;
4074
4075 /* probably a little skewed due to removing CRC */
4076 total_rx_bytes += length;
4077 total_rx_packets++;
4078
4079 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4080
4081 skb_put(skb, length);
4082
4083 /* Receive Checksum Offload */
4084 e1000_rx_checksum(adapter,
4085 (u32)(status) |
4086 ((u32)(rx_desc->errors) << 24),
4087 le16_to_cpu(rx_desc->csum), skb);
4088
4089 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4090
4091next_desc:
4092 rx_desc->status = 0;
4093
4094 /* return some buffers to hardware, one at a time is too slow */
4095 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4096 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4097 cleaned_count = 0;
4098 }
4099
4100 /* use prefetched values */
4101 rx_desc = next_rxd;
4102 buffer_info = next_buffer;
4103 }
4104 rx_ring->next_to_clean = i;
4105
4106 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4107 if (cleaned_count)
4108 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4109
4110 adapter->total_rx_packets += total_rx_packets;
4111 adapter->total_rx_bytes += total_rx_bytes;
4112 netdev->stats.rx_bytes += total_rx_bytes;
4113 netdev->stats.rx_packets += total_rx_packets;
4114 return cleaned;
4115}
4116
4117/**
4118 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4119 * @adapter: address of board private structure
4120 * @rx_ring: pointer to receive ring structure
4121 * @cleaned_count: number of buffers to allocate this pass
4122 **/
4123
4124static void
4125e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4126 struct e1000_rx_ring *rx_ring, int cleaned_count)
4127{
4128 struct net_device *netdev = adapter->netdev;
4129 struct pci_dev *pdev = adapter->pdev;
4130 struct e1000_rx_desc *rx_desc;
4131 struct e1000_buffer *buffer_info;
4132 struct sk_buff *skb;
4133 unsigned int i;
4134 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4135
4136 i = rx_ring->next_to_use;
4137 buffer_info = &rx_ring->buffer_info[i];
4138
4139 while (cleaned_count--) {
4140 skb = buffer_info->skb;
4141 if (skb) {
4142 skb_trim(skb, 0);
4143 goto check_page;
4144 }
4145
4146 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4147 if (unlikely(!skb)) {
4148 /* Better luck next round */
4149 adapter->alloc_rx_buff_failed++;
4150 break;
4151 }
4152
4153 /* Fix for errata 23, can't cross 64kB boundary */
4154 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4155 struct sk_buff *oldskb = skb;
4156 e_err(rx_err, "skb align check failed: %u bytes at "
4157 "%p\n", bufsz, skb->data);
4158 /* Try again, without freeing the previous */
4159 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4160 /* Failed allocation, critical failure */
4161 if (!skb) {
4162 dev_kfree_skb(oldskb);
4163 adapter->alloc_rx_buff_failed++;
4164 break;
4165 }
4166
4167 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4168 /* give up */
4169 dev_kfree_skb(skb);
4170 dev_kfree_skb(oldskb);
4171 break; /* while (cleaned_count--) */
4172 }
4173
4174 /* Use new allocation */
4175 dev_kfree_skb(oldskb);
4176 }
4177 buffer_info->skb = skb;
4178 buffer_info->length = adapter->rx_buffer_len;
4179check_page:
4180 /* allocate a new page if necessary */
4181 if (!buffer_info->page) {
4182 buffer_info->page = alloc_page(GFP_ATOMIC);
4183 if (unlikely(!buffer_info->page)) {
4184 adapter->alloc_rx_buff_failed++;
4185 break;
4186 }
4187 }
4188
4189 if (!buffer_info->dma) {
4190 buffer_info->dma = dma_map_page(&pdev->dev,
4191 buffer_info->page, 0,
4192 buffer_info->length,
4193 DMA_FROM_DEVICE);
4194 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4195 put_page(buffer_info->page);
4196 dev_kfree_skb(skb);
4197 buffer_info->page = NULL;
4198 buffer_info->skb = NULL;
4199 buffer_info->dma = 0;
4200 adapter->alloc_rx_buff_failed++;
4201 break; /* while !buffer_info->skb */
4202 }
4203 }
4204
4205 rx_desc = E1000_RX_DESC(*rx_ring, i);
4206 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4207
4208 if (unlikely(++i == rx_ring->count))
4209 i = 0;
4210 buffer_info = &rx_ring->buffer_info[i];
4211 }
4212
4213 if (likely(rx_ring->next_to_use != i)) {
4214 rx_ring->next_to_use = i;
4215 if (unlikely(i-- == 0))
4216 i = (rx_ring->count - 1);
4217
4218 /* Force memory writes to complete before letting h/w
4219 * know there are new descriptors to fetch. (Only
4220 * applicable for weak-ordered memory model archs,
4221 * such as IA-64). */
4222 wmb();
4223 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4224 }
4225}
4226
4227/**
4228 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4229 * @adapter: address of board private structure
4230 **/
4231
4232static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4233 struct e1000_rx_ring *rx_ring,
4234 int cleaned_count)
4235{
4236 struct e1000_hw *hw = &adapter->hw;
4237 struct net_device *netdev = adapter->netdev;
4238 struct pci_dev *pdev = adapter->pdev;
4239 struct e1000_rx_desc *rx_desc;
4240 struct e1000_buffer *buffer_info;
4241 struct sk_buff *skb;
4242 unsigned int i;
4243 unsigned int bufsz = adapter->rx_buffer_len;
4244
4245 i = rx_ring->next_to_use;
4246 buffer_info = &rx_ring->buffer_info[i];
4247
4248 while (cleaned_count--) {
4249 skb = buffer_info->skb;
4250 if (skb) {
4251 skb_trim(skb, 0);
4252 goto map_skb;
4253 }
4254
4255 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4256 if (unlikely(!skb)) {
4257 /* Better luck next round */
4258 adapter->alloc_rx_buff_failed++;
4259 break;
4260 }
4261
4262 /* Fix for errata 23, can't cross 64kB boundary */
4263 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4264 struct sk_buff *oldskb = skb;
4265 e_err(rx_err, "skb align check failed: %u bytes at "
4266 "%p\n", bufsz, skb->data);
4267 /* Try again, without freeing the previous */
4268 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4269 /* Failed allocation, critical failure */
4270 if (!skb) {
4271 dev_kfree_skb(oldskb);
4272 adapter->alloc_rx_buff_failed++;
4273 break;
4274 }
4275
4276 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4277 /* give up */
4278 dev_kfree_skb(skb);
4279 dev_kfree_skb(oldskb);
4280 adapter->alloc_rx_buff_failed++;
4281 break; /* while !buffer_info->skb */
4282 }
4283
4284 /* Use new allocation */
4285 dev_kfree_skb(oldskb);
4286 }
4287 buffer_info->skb = skb;
4288 buffer_info->length = adapter->rx_buffer_len;
4289map_skb:
4290 buffer_info->dma = dma_map_single(&pdev->dev,
4291 skb->data,
4292 buffer_info->length,
4293 DMA_FROM_DEVICE);
4294 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4295 dev_kfree_skb(skb);
4296 buffer_info->skb = NULL;
4297 buffer_info->dma = 0;
4298 adapter->alloc_rx_buff_failed++;
4299 break; /* while !buffer_info->skb */
4300 }
4301
4302 /*
4303 * XXX if it was allocated cleanly it will never map to a
4304 * boundary crossing
4305 */
4306
4307 /* Fix for errata 23, can't cross 64kB boundary */
4308 if (!e1000_check_64k_bound(adapter,
4309 (void *)(unsigned long)buffer_info->dma,
4310 adapter->rx_buffer_len)) {
4311 e_err(rx_err, "dma align check failed: %u bytes at "
4312 "%p\n", adapter->rx_buffer_len,
4313 (void *)(unsigned long)buffer_info->dma);
4314 dev_kfree_skb(skb);
4315 buffer_info->skb = NULL;
4316
4317 dma_unmap_single(&pdev->dev, buffer_info->dma,
4318 adapter->rx_buffer_len,
4319 DMA_FROM_DEVICE);
4320 buffer_info->dma = 0;
4321
4322 adapter->alloc_rx_buff_failed++;
4323 break; /* while !buffer_info->skb */
4324 }
4325 rx_desc = E1000_RX_DESC(*rx_ring, i);
4326 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4327
4328 if (unlikely(++i == rx_ring->count))
4329 i = 0;
4330 buffer_info = &rx_ring->buffer_info[i];
4331 }
4332
4333 if (likely(rx_ring->next_to_use != i)) {
4334 rx_ring->next_to_use = i;
4335 if (unlikely(i-- == 0))
4336 i = (rx_ring->count - 1);
4337
4338 /* Force memory writes to complete before letting h/w
4339 * know there are new descriptors to fetch. (Only
4340 * applicable for weak-ordered memory model archs,
4341 * such as IA-64). */
4342 wmb();
4343 writel(i, hw->hw_addr + rx_ring->rdt);
4344 }
4345}
4346
4347/**
4348 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4349 * @adapter:
4350 **/
4351
4352static void e1000_smartspeed(struct e1000_adapter *adapter)
4353{
4354 struct e1000_hw *hw = &adapter->hw;
4355 u16 phy_status;
4356 u16 phy_ctrl;
4357
4358 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4359 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4360 return;
4361
4362 if (adapter->smartspeed == 0) {
4363 /* If Master/Slave config fault is asserted twice,
4364 * we assume back-to-back */
4365 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4366 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4367 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4368 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4369 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4370 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4371 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4372 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4373 phy_ctrl);
4374 adapter->smartspeed++;
4375 if (!e1000_phy_setup_autoneg(hw) &&
4376 !e1000_read_phy_reg(hw, PHY_CTRL,
4377 &phy_ctrl)) {
4378 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4379 MII_CR_RESTART_AUTO_NEG);
4380 e1000_write_phy_reg(hw, PHY_CTRL,
4381 phy_ctrl);
4382 }
4383 }
4384 return;
4385 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4386 /* If still no link, perhaps using 2/3 pair cable */
4387 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4388 phy_ctrl |= CR_1000T_MS_ENABLE;
4389 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4390 if (!e1000_phy_setup_autoneg(hw) &&
4391 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4392 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4393 MII_CR_RESTART_AUTO_NEG);
4394 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4395 }
4396 }
4397 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4398 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4399 adapter->smartspeed = 0;
4400}
4401
4402/**
4403 * e1000_ioctl -
4404 * @netdev:
4405 * @ifreq:
4406 * @cmd:
4407 **/
4408
4409static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4410{
4411 switch (cmd) {
4412 case SIOCGMIIPHY:
4413 case SIOCGMIIREG:
4414 case SIOCSMIIREG:
4415 return e1000_mii_ioctl(netdev, ifr, cmd);
4416 default:
4417 return -EOPNOTSUPP;
4418 }
4419}
4420
4421/**
4422 * e1000_mii_ioctl -
4423 * @netdev:
4424 * @ifreq:
4425 * @cmd:
4426 **/
4427
4428static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4429 int cmd)
4430{
4431 struct e1000_adapter *adapter = netdev_priv(netdev);
4432 struct e1000_hw *hw = &adapter->hw;
4433 struct mii_ioctl_data *data = if_mii(ifr);
4434 int retval;
4435 u16 mii_reg;
4436 unsigned long flags;
4437
4438 if (hw->media_type != e1000_media_type_copper)
4439 return -EOPNOTSUPP;
4440
4441 switch (cmd) {
4442 case SIOCGMIIPHY:
4443 data->phy_id = hw->phy_addr;
4444 break;
4445 case SIOCGMIIREG:
4446 spin_lock_irqsave(&adapter->stats_lock, flags);
4447 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4448 &data->val_out)) {
4449 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4450 return -EIO;
4451 }
4452 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4453 break;
4454 case SIOCSMIIREG:
4455 if (data->reg_num & ~(0x1F))
4456 return -EFAULT;
4457 mii_reg = data->val_in;
4458 spin_lock_irqsave(&adapter->stats_lock, flags);
4459 if (e1000_write_phy_reg(hw, data->reg_num,
4460 mii_reg)) {
4461 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4462 return -EIO;
4463 }
4464 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4465 if (hw->media_type == e1000_media_type_copper) {
4466 switch (data->reg_num) {
4467 case PHY_CTRL:
4468 if (mii_reg & MII_CR_POWER_DOWN)
4469 break;
4470 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4471 hw->autoneg = 1;
4472 hw->autoneg_advertised = 0x2F;
4473 } else {
4474 u32 speed;
4475 if (mii_reg & 0x40)
4476 speed = SPEED_1000;
4477 else if (mii_reg & 0x2000)
4478 speed = SPEED_100;
4479 else
4480 speed = SPEED_10;
4481 retval = e1000_set_spd_dplx(
4482 adapter, speed,
4483 ((mii_reg & 0x100)
4484 ? DUPLEX_FULL :
4485 DUPLEX_HALF));
4486 if (retval)
4487 return retval;
4488 }
4489 if (netif_running(adapter->netdev))
4490 e1000_reinit_locked(adapter);
4491 else
4492 e1000_reset(adapter);
4493 break;
4494 case M88E1000_PHY_SPEC_CTRL:
4495 case M88E1000_EXT_PHY_SPEC_CTRL:
4496 if (e1000_phy_reset(hw))
4497 return -EIO;
4498 break;
4499 }
4500 } else {
4501 switch (data->reg_num) {
4502 case PHY_CTRL:
4503 if (mii_reg & MII_CR_POWER_DOWN)
4504 break;
4505 if (netif_running(adapter->netdev))
4506 e1000_reinit_locked(adapter);
4507 else
4508 e1000_reset(adapter);
4509 break;
4510 }
4511 }
4512 break;
4513 default:
4514 return -EOPNOTSUPP;
4515 }
4516 return E1000_SUCCESS;
4517}
4518
4519void e1000_pci_set_mwi(struct e1000_hw *hw)
4520{
4521 struct e1000_adapter *adapter = hw->back;
4522 int ret_val = pci_set_mwi(adapter->pdev);
4523
4524 if (ret_val)
4525 e_err(probe, "Error in setting MWI\n");
4526}
4527
4528void e1000_pci_clear_mwi(struct e1000_hw *hw)
4529{
4530 struct e1000_adapter *adapter = hw->back;
4531
4532 pci_clear_mwi(adapter->pdev);
4533}
4534
4535int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4536{
4537 struct e1000_adapter *adapter = hw->back;
4538 return pcix_get_mmrbc(adapter->pdev);
4539}
4540
4541void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4542{
4543 struct e1000_adapter *adapter = hw->back;
4544 pcix_set_mmrbc(adapter->pdev, mmrbc);
4545}
4546
4547void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4548{
4549 outl(value, port);
4550}
4551
4552static bool e1000_vlan_used(struct e1000_adapter *adapter)
4553{
4554 u16 vid;
4555
4556 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4557 return true;
4558 return false;
4559}
4560
4561static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4562 bool filter_on)
4563{
4564 struct e1000_hw *hw = &adapter->hw;
4565 u32 rctl;
4566
4567 if (!test_bit(__E1000_DOWN, &adapter->flags))
4568 e1000_irq_disable(adapter);
4569
4570 if (filter_on) {
4571 /* enable VLAN receive filtering */
4572 rctl = er32(RCTL);
4573 rctl &= ~E1000_RCTL_CFIEN;
4574 if (!(adapter->netdev->flags & IFF_PROMISC))
4575 rctl |= E1000_RCTL_VFE;
4576 ew32(RCTL, rctl);
4577 e1000_update_mng_vlan(adapter);
4578 } else {
4579 /* disable VLAN receive filtering */
4580 rctl = er32(RCTL);
4581 rctl &= ~E1000_RCTL_VFE;
4582 ew32(RCTL, rctl);
4583 }
4584
4585 if (!test_bit(__E1000_DOWN, &adapter->flags))
4586 e1000_irq_enable(adapter);
4587}
4588
4589static void e1000_vlan_mode(struct net_device *netdev, u32 features)
4590{
4591 struct e1000_adapter *adapter = netdev_priv(netdev);
4592 struct e1000_hw *hw = &adapter->hw;
4593 u32 ctrl;
4594
4595 if (!test_bit(__E1000_DOWN, &adapter->flags))
4596 e1000_irq_disable(adapter);
4597
4598 ctrl = er32(CTRL);
4599 if (features & NETIF_F_HW_VLAN_RX) {
4600 /* enable VLAN tag insert/strip */
4601 ctrl |= E1000_CTRL_VME;
4602 } else {
4603 /* disable VLAN tag insert/strip */
4604 ctrl &= ~E1000_CTRL_VME;
4605 }
4606 ew32(CTRL, ctrl);
4607
4608 if (!test_bit(__E1000_DOWN, &adapter->flags))
4609 e1000_irq_enable(adapter);
4610}
4611
4612static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4613{
4614 struct e1000_adapter *adapter = netdev_priv(netdev);
4615 struct e1000_hw *hw = &adapter->hw;
4616 u32 vfta, index;
4617
4618 if ((hw->mng_cookie.status &
4619 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4620 (vid == adapter->mng_vlan_id))
4621 return;
4622
4623 if (!e1000_vlan_used(adapter))
4624 e1000_vlan_filter_on_off(adapter, true);
4625
4626 /* add VID to filter table */
4627 index = (vid >> 5) & 0x7F;
4628 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4629 vfta |= (1 << (vid & 0x1F));
4630 e1000_write_vfta(hw, index, vfta);
4631
4632 set_bit(vid, adapter->active_vlans);
4633}
4634
4635static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4636{
4637 struct e1000_adapter *adapter = netdev_priv(netdev);
4638 struct e1000_hw *hw = &adapter->hw;
4639 u32 vfta, index;
4640
4641 if (!test_bit(__E1000_DOWN, &adapter->flags))
4642 e1000_irq_disable(adapter);
4643 if (!test_bit(__E1000_DOWN, &adapter->flags))
4644 e1000_irq_enable(adapter);
4645
4646 /* remove VID from filter table */
4647 index = (vid >> 5) & 0x7F;
4648 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4649 vfta &= ~(1 << (vid & 0x1F));
4650 e1000_write_vfta(hw, index, vfta);
4651
4652 clear_bit(vid, adapter->active_vlans);
4653
4654 if (!e1000_vlan_used(adapter))
4655 e1000_vlan_filter_on_off(adapter, false);
4656}
4657
4658static void e1000_restore_vlan(struct e1000_adapter *adapter)
4659{
4660 u16 vid;
4661
4662 if (!e1000_vlan_used(adapter))
4663 return;
4664
4665 e1000_vlan_filter_on_off(adapter, true);
4666 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4667 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4668}
4669
4670int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4671{
4672 struct e1000_hw *hw = &adapter->hw;
4673
4674 hw->autoneg = 0;
4675
4676 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4677 * for the switch() below to work */
4678 if ((spd & 1) || (dplx & ~1))
4679 goto err_inval;
4680
4681 /* Fiber NICs only allow 1000 gbps Full duplex */
4682 if ((hw->media_type == e1000_media_type_fiber) &&
4683 spd != SPEED_1000 &&
4684 dplx != DUPLEX_FULL)
4685 goto err_inval;
4686
4687 switch (spd + dplx) {
4688 case SPEED_10 + DUPLEX_HALF:
4689 hw->forced_speed_duplex = e1000_10_half;
4690 break;
4691 case SPEED_10 + DUPLEX_FULL:
4692 hw->forced_speed_duplex = e1000_10_full;
4693 break;
4694 case SPEED_100 + DUPLEX_HALF:
4695 hw->forced_speed_duplex = e1000_100_half;
4696 break;
4697 case SPEED_100 + DUPLEX_FULL:
4698 hw->forced_speed_duplex = e1000_100_full;
4699 break;
4700 case SPEED_1000 + DUPLEX_FULL:
4701 hw->autoneg = 1;
4702 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4703 break;
4704 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4705 default:
4706 goto err_inval;
4707 }
4708 return 0;
4709
4710err_inval:
4711 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4712 return -EINVAL;
4713}
4714
4715static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4716{
4717 struct net_device *netdev = pci_get_drvdata(pdev);
4718 struct e1000_adapter *adapter = netdev_priv(netdev);
4719 struct e1000_hw *hw = &adapter->hw;
4720 u32 ctrl, ctrl_ext, rctl, status;
4721 u32 wufc = adapter->wol;
4722#ifdef CONFIG_PM
4723 int retval = 0;
4724#endif
4725
4726 netif_device_detach(netdev);
4727
4728 if (netif_running(netdev)) {
4729 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4730 e1000_down(adapter);
4731 }
4732
4733#ifdef CONFIG_PM
4734 retval = pci_save_state(pdev);
4735 if (retval)
4736 return retval;
4737#endif
4738
4739 status = er32(STATUS);
4740 if (status & E1000_STATUS_LU)
4741 wufc &= ~E1000_WUFC_LNKC;
4742
4743 if (wufc) {
4744 e1000_setup_rctl(adapter);
4745 e1000_set_rx_mode(netdev);
4746
4747 /* turn on all-multi mode if wake on multicast is enabled */
4748 if (wufc & E1000_WUFC_MC) {
4749 rctl = er32(RCTL);
4750 rctl |= E1000_RCTL_MPE;
4751 ew32(RCTL, rctl);
4752 }
4753
4754 if (hw->mac_type >= e1000_82540) {
4755 ctrl = er32(CTRL);
4756 /* advertise wake from D3Cold */
4757 #define E1000_CTRL_ADVD3WUC 0x00100000
4758 /* phy power management enable */
4759 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4760 ctrl |= E1000_CTRL_ADVD3WUC |
4761 E1000_CTRL_EN_PHY_PWR_MGMT;
4762 ew32(CTRL, ctrl);
4763 }
4764
4765 if (hw->media_type == e1000_media_type_fiber ||
4766 hw->media_type == e1000_media_type_internal_serdes) {
4767 /* keep the laser running in D3 */
4768 ctrl_ext = er32(CTRL_EXT);
4769 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4770 ew32(CTRL_EXT, ctrl_ext);
4771 }
4772
4773 ew32(WUC, E1000_WUC_PME_EN);
4774 ew32(WUFC, wufc);
4775 } else {
4776 ew32(WUC, 0);
4777 ew32(WUFC, 0);
4778 }
4779
4780 e1000_release_manageability(adapter);
4781
4782 *enable_wake = !!wufc;
4783
4784 /* make sure adapter isn't asleep if manageability is enabled */
4785 if (adapter->en_mng_pt)
4786 *enable_wake = true;
4787
4788 if (netif_running(netdev))
4789 e1000_free_irq(adapter);
4790
4791 pci_disable_device(pdev);
4792
4793 return 0;
4794}
4795
4796#ifdef CONFIG_PM
4797static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4798{
4799 int retval;
4800 bool wake;
4801
4802 retval = __e1000_shutdown(pdev, &wake);
4803 if (retval)
4804 return retval;
4805
4806 if (wake) {
4807 pci_prepare_to_sleep(pdev);
4808 } else {
4809 pci_wake_from_d3(pdev, false);
4810 pci_set_power_state(pdev, PCI_D3hot);
4811 }
4812
4813 return 0;
4814}
4815
4816static int e1000_resume(struct pci_dev *pdev)
4817{
4818 struct net_device *netdev = pci_get_drvdata(pdev);
4819 struct e1000_adapter *adapter = netdev_priv(netdev);
4820 struct e1000_hw *hw = &adapter->hw;
4821 u32 err;
4822
4823 pci_set_power_state(pdev, PCI_D0);
4824 pci_restore_state(pdev);
4825 pci_save_state(pdev);
4826
4827 if (adapter->need_ioport)
4828 err = pci_enable_device(pdev);
4829 else
4830 err = pci_enable_device_mem(pdev);
4831 if (err) {
4832 pr_err("Cannot enable PCI device from suspend\n");
4833 return err;
4834 }
4835 pci_set_master(pdev);
4836
4837 pci_enable_wake(pdev, PCI_D3hot, 0);
4838 pci_enable_wake(pdev, PCI_D3cold, 0);
4839
4840 if (netif_running(netdev)) {
4841 err = e1000_request_irq(adapter);
4842 if (err)
4843 return err;
4844 }
4845
4846 e1000_power_up_phy(adapter);
4847 e1000_reset(adapter);
4848 ew32(WUS, ~0);
4849
4850 e1000_init_manageability(adapter);
4851
4852 if (netif_running(netdev))
4853 e1000_up(adapter);
4854
4855 netif_device_attach(netdev);
4856
4857 return 0;
4858}
4859#endif
4860
4861static void e1000_shutdown(struct pci_dev *pdev)
4862{
4863 bool wake;
4864
4865 __e1000_shutdown(pdev, &wake);
4866
4867 if (system_state == SYSTEM_POWER_OFF) {
4868 pci_wake_from_d3(pdev, wake);
4869 pci_set_power_state(pdev, PCI_D3hot);
4870 }
4871}
4872
4873#ifdef CONFIG_NET_POLL_CONTROLLER
4874/*
4875 * Polling 'interrupt' - used by things like netconsole to send skbs
4876 * without having to re-enable interrupts. It's not called while
4877 * the interrupt routine is executing.
4878 */
4879static void e1000_netpoll(struct net_device *netdev)
4880{
4881 struct e1000_adapter *adapter = netdev_priv(netdev);
4882
4883 disable_irq(adapter->pdev->irq);
4884 e1000_intr(adapter->pdev->irq, netdev);
4885 enable_irq(adapter->pdev->irq);
4886}
4887#endif
4888
4889/**
4890 * e1000_io_error_detected - called when PCI error is detected
4891 * @pdev: Pointer to PCI device
4892 * @state: The current pci connection state
4893 *
4894 * This function is called after a PCI bus error affecting
4895 * this device has been detected.
4896 */
4897static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4898 pci_channel_state_t state)
4899{
4900 struct net_device *netdev = pci_get_drvdata(pdev);
4901 struct e1000_adapter *adapter = netdev_priv(netdev);
4902
4903 netif_device_detach(netdev);
4904
4905 if (state == pci_channel_io_perm_failure)
4906 return PCI_ERS_RESULT_DISCONNECT;
4907
4908 if (netif_running(netdev))
4909 e1000_down(adapter);
4910 pci_disable_device(pdev);
4911
4912 /* Request a slot slot reset. */
4913 return PCI_ERS_RESULT_NEED_RESET;
4914}
4915
4916/**
4917 * e1000_io_slot_reset - called after the pci bus has been reset.
4918 * @pdev: Pointer to PCI device
4919 *
4920 * Restart the card from scratch, as if from a cold-boot. Implementation
4921 * resembles the first-half of the e1000_resume routine.
4922 */
4923static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4924{
4925 struct net_device *netdev = pci_get_drvdata(pdev);
4926 struct e1000_adapter *adapter = netdev_priv(netdev);
4927 struct e1000_hw *hw = &adapter->hw;
4928 int err;
4929
4930 if (adapter->need_ioport)
4931 err = pci_enable_device(pdev);
4932 else
4933 err = pci_enable_device_mem(pdev);
4934 if (err) {
4935 pr_err("Cannot re-enable PCI device after reset.\n");
4936 return PCI_ERS_RESULT_DISCONNECT;
4937 }
4938 pci_set_master(pdev);
4939
4940 pci_enable_wake(pdev, PCI_D3hot, 0);
4941 pci_enable_wake(pdev, PCI_D3cold, 0);
4942
4943 e1000_reset(adapter);
4944 ew32(WUS, ~0);
4945
4946 return PCI_ERS_RESULT_RECOVERED;
4947}
4948
4949/**
4950 * e1000_io_resume - called when traffic can start flowing again.
4951 * @pdev: Pointer to PCI device
4952 *
4953 * This callback is called when the error recovery driver tells us that
4954 * its OK to resume normal operation. Implementation resembles the
4955 * second-half of the e1000_resume routine.
4956 */
4957static void e1000_io_resume(struct pci_dev *pdev)
4958{
4959 struct net_device *netdev = pci_get_drvdata(pdev);
4960 struct e1000_adapter *adapter = netdev_priv(netdev);
4961
4962 e1000_init_manageability(adapter);
4963
4964 if (netif_running(netdev)) {
4965 if (e1000_up(adapter)) {
4966 pr_info("can't bring device back up after reset\n");
4967 return;
4968 }
4969 }
4970
4971 netif_device_attach(netdev);
4972}
4973
4974/* e1000_main.c */